Patent Publication Number: US-2011051417-A1

Title: Lamp holder, illumination device, display device, and television receiver apparatus

Description:
TECHNICAL FIELD 
     The present invention relates to a lamp holder, an illumination device, a display device, and a television receiver apparatus. 
     BACKGROUND ART 
     For example, a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light by itself, and separately requires a backlight unit as an illumination device. The backlight unit is provided on a back side (on a side opposite a display surface) of the liquid crystal panel, and includes a chassis made of metal or resin and opening on a side of the liquid crystal panel, a reflection sheet provided in the chassis multiple fluorescent tubes (for example, cold cathode tubes) housed as lamps in the chassis, multiple optical members (diffusing sheets or the like) provided in the opening in the chassis for efficiently emitting lights emitted by the cold cathode tubes toward the liquid crystal panel, and a lamp clip that supports an intermediate portion of each of the cold cathode tubes having an elongated tubular shape. The lamp clip includes a lamp gripping portion for gripping the cold cathode tube on a plate-shaped main body mounted to a bottom plate of the chassis. 
     When the cold cathode tube is lit, an amount of light of the cold cathode tube is inevitably slightly reduced in the lamp gripping portion, which may cause a part of the main body to be observed as a faint shadow on the liquid crystal panel. 
     Thus, a technique of preventing occurrence of a shadow on a main body is proposed in Patent Document 1. In this technique, a main body has a triangular sectional shape, an sloped surface is formed on a surface thereof, and the sloped surface can reflect, toward a liquid crystal panel, a light emitted from opposite sides of a portion where a lamp gripping portion grips a cold cathode tube to the main body. This prevents occurrence of a shadow on the main body. 
     Patent Document 1: Japanese Patent Laid-Open No. 2005-17691  
     DISCLOSURE OF THE INVENTION 
     Problems to be Solved by the Invention 
     To reduce a thickness of a liquid crystal display device, it is necessary to reduce a thickness of each component or reduce a space between components. At this time, if a space between an optical member and a lamp clip is reduced, a dark portion created by the lamp clip tends to be easily visually identified. Thus, there is a possibility that the technique described in Patent Document 1 cannot accommodate a further reduction in thickness of the liquid crystal display device, and further measures have been desired. 
     The present invention is completed based on the above-described circumstances, and has an object to reduce visible dark portions. 
     Means for Solving the Problems 
     A lamp holder of the present invention includes a lamp gripping portion having an open-end ring shape for gripping a tubular lamp. At least a part of an inner surface of the lamp gripping portion located on a lamp holding side is angled such that the lamp gripping portion has a ridge shape that spreads toward a bottom away from the lamp. 
     Thus, a gap having an extending skirt is ensured between the lamp and the angular portion of the inner surface of the lamp gripping portion, and the light emitted from the lamp is efficiently emitted to the outside of the lamp gripping portion through the gap. This can improve light taking efficiency from the lamp, and thus the lamp gripping portion is less likely to be recognized as a dark portion. 
     A lamp holder of the present invention includes a lamp gripping portion having an open-end ring shape for gripping a tubular lamp and having a surface on a lamp holding side. The surface is formed so as to have a gap between the lamp gripping portion and a surface of the lamp. The gap has different widths from point to point in a direction corresponding to a length direction of the lamp, between the lamp gripping portion and a surface of the lamp. 
     Thus, the gap having different widths in the length direction of the lamp exists between the surface of the tubular lamp and the opposing surface of the lamp gripping portion, thereby allowing the light emitted from the lamp to be efficiently emitted to the outside of the lamp gripping portion. This can improve light taking efficiency from the lamp, and thus prevents the lamp gripping portion is less likely to be recognized as a dark portion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view showing an outline configuration of a television receiver apparatus according to a first embodiment of the present invention; 
         FIG. 2  is an exploded perspective view showing a general configuration of a liquid crystal display device; 
         FIG. 3  is a sectional view showing the liquid crystal display device cut along a short side direction; 
         FIG. 4  is a sectional view showing the liquid crystal display device cut along a long side direction; 
         FIG. 5  is a front view of a lamp clip; 
         FIG. 6  is a plan view of the lamp clip; 
         FIG. 7  is a bottom view of the lamp clip; 
         FIG. 8  is a side view of the lamp clip; 
         FIG. 9  is a plan view showing the lamp clips mounted to a chassis; 
         FIG. 10  is a plan view of the chassis and a reflection sheet; 
         FIG. 11  is a magnified plan view of the chassis and the reflection sheet; 
         FIG. 12  is a sectional view showing the lamp clip installed in the liquid crystal display device; 
         FIG. 13  is a sectional view taken along the line A-A in  FIG. 12 ; 
         FIG. 14  is a sectional view taken along the line B-B in  FIG. 12 ; 
         FIG. 15  is a sectional view taken along the line C-C in  FIG. 12 ; 
         FIG. 16  is a sectional view taken along the line D-D in  FIG. 12 ; 
         FIG. 17  is a sectional view taken along the line E-E in  FIG. 12 ; 
         FIG. 18  is a sectional view showing the lamp clip before being mounted to the chassis; 
         FIG. 19  is a sectional view showing the lamp clip during mounting, a main body of which is tilted; 
         FIG. 20  is a sectional view showing the lamp clip during mounting before the main body is slid; 
         FIG. 21  is a sectional view showing the lamp clip, a first mounting portion of which interferes with a rim of a second mounting hole when the lamp clip is held the other way around to the normal mounting direction; 
         FIG. 22  is a plan view showing a lamp clip mounted to a chassis according to a second embodiment of the present invention; 
         FIG. 23  is a plan view showing a lamp clip mounted to a chassis according to a third embodiment of the present invention; 
         FIG. 24  is a plan view showing a lamp clip mounted to a chassis according to a variation aspect of the third embodiment; 
         FIG. 25  is a bottom view of a lamp clip according to a fourth embodiment of the present invention; 
         FIG. 26  is a magnified plan view of the chassis; 
         FIG. 27  is a bottom view of a lamp clip according to a variation aspect of the fourth embodiment; 
         FIG. 28  is a magnified plan view of the chassis; 
         FIG. 29  is a side sectional view of a main body of a lamp clip according to a fifth embodiment of the present invention; 
         FIG. 30  is a side sectional view of a main body of a lamp clip according to a sixth embodiment of the present invention; 
         FIG. 31  is a side sectional view of a main body of a lamp clip according to a seventh embodiment of the present invention; 
         FIG. 32  is a side sectional view of a lamp gripping portion of a lamp clip according to an eighth embodiment of the present invention; 
         FIG. 33  is a side sectional view of a lamp gripping portion of a lamp clip according to a ninth embodiment of the present invention; 
         FIG. 34  is a side sectional view of a lamp gripping portion of a lamp clip according to a tenth embodiment of the present invention; 
         FIG. 35  is a side sectional view of a lamp gripping portion of a lamp clip according to an eleventh embodiment of the present invention; 
         FIG. 36  is a front view of a lamp clip according to a twelfth embodiment of the present invention; 
         FIG. 37  is a plan view showing a state where the lamp clip is mounted to a chassis; 
         FIG. 38  is a plan view of a lamp clip according to a thirteenth embodiment of the present invention; 
         FIG. 39  is a front sectional view showing a lamp clip mounted to a chassis according to a fourteenth embodiment of the present invention; 
         FIG. 40  is a plan sectional view of a holding protrusion on a lamp gripping portion of a lamp clip according to a fifteenth embodiment of the present invention; 
         FIG. 41  is a plan sectional view of an arm portion of the lamp gripping portion; 
         FIG. 42  is a plan sectional view of a holding protrusion on a lamp gripping portion of a lamp clip according to a sixteenth embodiment of the present invention; 
         FIG. 43  is a plan sectional view of a holding protrusion according to a variation aspect of the sixteenth embodiment; 
         FIG. 44  is a front view of a lamp clip of other embodiments (1) and (5); 
         FIG. 45  is a plan view of the lamp clip of the other embodiments (1) and (5); and 
         FIG. 46  is a plan view of a chassis of another embodiment (9). 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     First Embodiment 
     A first embodiment of the present invention will be described with reference to  FIGS. 1 to 21 . 
     A television receiver apparatus TV according to this embodiment includes, as shown in  FIG. 1 , a liquid crystal display device  10 , front and back cabinets Ca and Cb that hold and house the liquid crystal display device  10  therebetween, a power source P, a tuner T, and a stand S. The liquid crystal display device (display device)  10  generally has a horizontally oriented rectangular shape, and is housed in a vertically placed state. The liquid crystal display device  10  includes, as shown in  FIG. 2 , a liquid crystal panel  11  as a display panel, and a backlight unit (illumination device)  12  as an external light source, which are integrally held by a frame-shaped bezel  13  or the like. In a part of the drawings, an X-axis, a Y-axis, and a Z-axis are shown so that axial directions are in directions shown in the drawings. 
     Next, the liquid crystal panel  11  and the backlight unit  12  that constitute the liquid crystal display device  10  will be described (see  FIGS. 2 to 4 ). 
     The liquid crystal panel (display panel)  11  is configured so that a pair of glass substrates is bonded to each other with a predetermined gap therebetween, and a liquid crystal is sealed between the glass substrates. On one of the glass substrates, a switching element (for example, TFT) connected to source wiring and gate wiring perpendicular to each other, a pixel electrode connected to the switching element, and further an orientation film or the like are provided. On the other of the glass substrates, a color filter in which coloring portions of such as R(red), G (green) and B (blue) are placed in a predetermined arrangement, a counter electrode, and further an orientation film or the like are provided. On outsides of the substrates, polarizing plates  11   a  and  11   b  are provided (see  FIGS. 3 and 4 ). 
     As shown in  FIG. 2 , the backlight unit  12  includes a substantially box-shaped chassis  14  opening on a side of a light emission surface (liquid crystal panel  11 ), a diffusing plate  15   a  provided to cover an opening  14   b  in the chassis  14 , a plurality of optical sheets  15   b  provided between the diffusing plate  15   a  and the liquid crystal panel  11 , and a frame  16  that is provided along a long side of the chassis  14  and holds a long side edge part of the diffusing plate  15   a  between the frame  16  and the chassis  14 . In the chassis  14 , a cold cathode tube (light source)  17 , a lamp clip  18  for mounting the cold cathode tube  17  to the chassis  14 , a relay connector  19  that relays electrical connection at each edge portion of the cold cathode tube  17 , and a holder  20  that collectively covers edge portions of a group of cold cathode tubes  17  and a group of relay connectors  19  are further provided. In the backlight unit  12 , the side closer to the diffusing plate  15   a  than the cold cathode tube  17  is a light output side. In  FIGS. 2 to 4 , the lamp clip  18  is not shown. 
     The chassis  14  is made of metal, and formed of sheet metal into a shallow substantially box shape including a rectangular bottom plate, and a folded outer edge part  21  (a folded outer edge part  21   a  in a short side direction and a folded outer edge part  21   b  in a long side direction) folded to rise from each side into a substantially U shape. In the bottom plate of the chassis  14 , a plurality of mounting holes  22  in which the relay connectors  19  are mounted are provided in opposite edge portions in the long side direction. Further, in an upper surface of the folded outer edge part  21   b  of the chassis  14 , as shown in  FIG. 3 , a fixing hole  14   c  is provided so that the bezel  13 , the frame  16 , and the chassis  14  or the like can be integrated by a screw or the like. 
     A reflection sheet  23  is provided on an inner surface side (side opposing the cold cathode tube  17 ) of the bottom plate of the chassis  14 . The reflection sheet  23  is made of synthetic resin, has a white surface with high reflectivity, and is placed along an inside of a bottom plate surface of the chassis  14  to cover substantially the entire bottom plate surface. As shown in  FIG. 3 , a long side edge part of the reflection sheet  23  rises to cover the folded outer edge part  21   b  of the chassis  14 , and is held between the chassis  14  and the diffusing plate  15   a.  The reflection sheet  23  can reflect a light emitted from the cold cathode tube  17  toward the diffusing plate  15   a.    
     The cold cathode tube  17  has an elongated tubular shape, and a plurality of cold cathode tubes  17  are housed in the chassis  14  in a state where the cold cathode tubes  17  are arranged in parallel with each other and a length direction (axial direction) thereof matching the long side direction of the chassis  14  (see  FIG. 2 ). The cold cathode tube  17  is slightly raised from the bottom plate (reflection sheet  23 ) of the chassis  14 , each edge portions is fitted in the relay connector  19 , and the holder  20  is mounted to cover the relay connectors  19 . 
     The holder  20  is made of white synthetic resin, covers the edge portion of the cold cathode tube  17 , and has an elongated substantially box shape extending along the short side direction of the chassis  14 . As shown in  FIG. 4 , the holder  20  has a stepped surface on which the diffusing plate  15   a  and the liquid crystal panel  11  can be placed on different steps, is provided to partially overlap the folded outer edge part  21   a  in the short side direction of the chassis  14 , and forms a side wall of the backlight unit  12  together with the folded outer edge part  21   a.  An insertion pin  24  protrudes from a surface of the holder  20  opposing the folded outer edge part  21   a  of the chassis  14 , and the insertion pin  24  is inserted into an insertion hole  25  formed in an upper surface of the folded outer edge part  21   a  of the chassis  14  to mount the holder  20  to the chassis  14 . 
     The stepped surface of the holder  20  includes three surfaces parallel to the bottom plate surface of the chassis  14 , and a short side edge part of the diffusing plate  15   a  is placed on a first surface  20   a  in the lowest position. Further, a tilted cover  26  tilted toward the bottom plate surface of the chassis  14  extends from the first surface  20   a.  On a second surface  20   b  of the stepped surface of the holder  20 , a short side edge part of the liquid crystal panel  11  is placed. A third surface  20   c  in the highest position of the stepped surface of the holder  20  is provided in a position overlapping the folded outer edge part  21   a  of the chassis  14 , and in contact with the bezel  13 . 
     The diffusing plate  15   a  is formed of a plate member made of synthetic resin in which light scattering particles are dispersed, and has a function of scatting a linear light emitted from the cold cathode tube  17  as a tubular light source. The short side edge part of the diffusing plate  15   a  is placed on the first surface  20   a  of the holder  20  as described above, and is not subjected to a vertical constraining force. A long side edge part of the diffusing plate  15   a  is held between the chassis  14  (reflection sheet  23 ) and the frame  16  and secured as shown in  FIG. 3 . 
     The optical sheet  15   b  provided on the diffusing plate  15   a  includes a diffusing sheet, a lens sheet, and a reflective polarizing plate stacked in order from the side of the diffusing plate  15   a,  and has a function of turning a light emitted from the cold cathode tube  17  and having passed through the diffusing plate  15   a  into a planer light. The liquid crystal panel  11  is provided on an upper surface of the optical sheet  15   b,  and the optical sheet  15   b  is held between the diffusing plate  15   a  and the liquid crystal panel  11 . 
     Now, the lamp clip  18  will be described in detail. The lamp clip  18  is made of synthetic resin (for example, polycarbonate), has a white surface with high light reflectivity, and includes, as shown in  FIGS. 5 to 8 , a main body  27  (mounting plate, base portion) having a substantially plate shape along the bottom plates of the chassis  14  and the reflection sheet  23  and a substantially rectangular shape on the plan view. The lamp clip  18  is mounted to the chassis  14  with a length direction of the main body  27  being in a position substantially parallel to the short side direction (Y-axis direction) of the chassis  14 , that is, a position (direction) substantially parallel to a direction perpendicular to the axial direction (length direction, X-axis direction) of the cold cathode tube  17 . Hereinafter, the long side direction and the short side direction are described with reference to the bottom plates of the chassis  14  and the reflection sheet  23  if not otherwise specified. The Z-axis direction is described with an upper side in  FIGS. 3 and 4  being a front side and an opposite lower side being a back side. 
     On a surface on the front side (a surface opposing the diffusing plate  15   a  and the cold cathode tube  17 , a surface on the side opposite the chassis  14 ) of the main body  27 , a lamp gripping portion  28  for supporting the cold cathode tube  17  in a predetermined height position, and a support pin  29  for supporting the diffusing plate  15   a  in a position higher than the cold cathode tube  17  are provided. A plurality of (four in this embodiment) lamp gripping portions  28  are arranged in positions spaced apart from each other in the length direction of the main body  27 , and grip different cold cathode tubes  17 . Pitches between the lamp gripping portions  28  are substantially the same, and match pitches between the cold cathode tubes  17  arranged in the chassis  14 . A support pin  29  is placed in a position offset (displaced), that is, eccentric from a center CC of the main body  27  ( FIGS. 5 and 6 ). In other words, the support pin  29  is provided in a position off the center CC of the main body  27 , and further in other words, in a position away from the center CC of the main body  27 . Further in other words, the support pin  29  is placed in a position a predetermined distance (space) apart from the center CC of the main body  27 , and further in other words, in a position between the center CC of the main body  27  and an outer edge portion. Specifically, the support pin  29  is provided in a position offset (displaced), that is, eccentric in the length direction from a surface CS passing through the center CC (middle position in the length direction) of the main body  27  and along a direction perpendicular to the Z-axis direction and the X-axis direction, that is, a direction perpendicular to the length direction of the main body  27 . More Specifically, the support pin  29  is placed in a substantially intermediate position between a lamp gripping portion  28  closest to an edge of the main body  27 , and a lamp gripping portion  28  adjacent to the above-described lamp gripping portion  28 . On a surface on the back side (a surface opposing the chassis  14  and the reflection sheet  23 , a surface on the side opposite the diffusing plate  15   a  and the cold cathode tube  17 ) of the main body  27 , mounting portions  30  and  31  for holding the lamp clip  18  in a mounting state to the chassis  14  are provided. A plurality of (two in this embodiment) mounting portions  30  and  31  are provided in positions spaced apart from each other in the length direction of the main body  27 . 
     The lamp clips  18  are provided in a plurality of dispersed positions on inner surfaces of the bottom plates of the chassis  14  and the reflection sheet  23  as shown in  FIG. 9 , and an arrangement thereof will be described below in detail. The lamp clips  18  are arranged in a plurality of positions spaced apart from each other in the long side direction (X-axis direction) of the chassis  14  and the reflection sheet  23 , and thus can grip the cold cathode tubes  17  in a plurality of positions spaced apart in the axial direction. Further, a larger number of lamp clips  18  are provided on a center side (side of a reference line L 1 ) than opposite end sides in the short side direction (Y-axis direction) of the bottom plates of the chassis  14  and the reflection sheet  23 . Specifically, on the center side in the short side direction of the chassis  14  and the reflection sheet  23 , more specifically, in each of positions with a virtual reference line L 1  therebetween passing through the middle position and crossing along the long side direction (X-axis direction, length direction of the cold cathode tube  17 , direction perpendicular to the length direction of the main body  27 , and plane direction of the diffusing plate  15   a ), three lamp clips  18  are provided spaced apart in the long side direction, and on the opposite end sides in the short side direction from the six lamp clips  18 , pairs of lamp clips  18  are provided spaced apart in the long side direction. Thus, a larger number of lamp gripping portions  28 , that is, a larger number of support parts for the cold cathode tubes  17  are provided, and a larger number of support pins  29 , that is, a larger number of support parts for the diffusing plate  15   a  are provided on the center side (side of the reference line L 1 ) than the opposite end sides in the short side direction of the chassis  14  and the reflection sheet  23 . 
     The pairs of lamp clips  18  (lamp clips  18  provided on the opposite end sides with respect to the center side in the short side direction) arranged in the long side direction are provided in positions displaced in the long side direction with respect to adjacent lamp clips  18  in the short side direction. Thus, as compared with lamp clips  18  arranged in line along the short side direction, the lamp clips  18  are dispersed in the surface of the bottom plate of the reflection sheet  23 , and shadows of the lamp clips  18  are not easily visually identified from the property of human eyes. Specifically, with the same number of the lamp clips  18 , the lamp clips  18  linearly or collectively arranged are easily visually identified from the property of human eyes. By discretely arranging the lamp clips  18  as in this embodiment, luminance unevenness in the backlight unit  12  is less likely to occur even if the reflection sheet  23  and the lamp clip  18  have different light reflectivities. 
     A mounting direction (mounting position, mounting state) of each lamp clip  18  to the bottom plates of the chassis  14  and the reflection sheet  23  is set so that each support pin  29  is directed toward the above-described reference line L 1  (closer to the reference line L 1 , or near the reference line L 1 ), that is, eccentric toward the reference line L 1 . Specifically, each lamp clip  18  is mounted with the length direction of the main body  27  matching the short side direction (Y-axis direction, length direction of the cold cathode tube  17 , direction perpendicular to the reference line L 1 ) of the chassis  14  and the reflection sheet  23 . In each lamp clip  18 , the support pin  29  is provided in the eccentric position in the length direction of the main body  27 , and thus there is a direction in the mounting direction to the chassis  14 . Thus, two mounting directions of each lamp clip  18  are set including a first mounting direction (first mounting position, first mounting state) with the support pin  29  directed downward in  FIG. 9 , and a second mounting direction (second mounting position, second mounting state) with the support pin  29  directed upward in  FIG. 9  in the direction opposite the first mounting direction. On the bottom plates of the chassis  14  and the reflection sheet  23 , the lamp clips  18  mounted in a first region A 1  on an upper side of the reference line L 1  in  FIG. 9  are in the first mounting direction, while the lamp clips  18  mounted in a second region A 2  on a lower side in  FIG. 9  are in the second mounting direction. Specifically, the lamp clips  18  are divided into a first lamp clip group  18 A in the first mounting direction and a second lamp clip group  18 B in the second mounting direction at the reference line L 1  (as a border), and all the support pins  29  eccentrically placed on the main body  27  are placed closer to the reference line L 1 . In this state, a distance between the reference line L 1  and the support pin  29  of each lamp clip  18  is smaller than a distance between the reference line L 1  and the center CC of the main body  27  of each lamp clip  18 . Thus, each support pin  29  supports the diffusing plate  15   a  in a position closer to the center side in the short side direction of the diffusing plate  15   a,  in other word, distribution density of the support pins  29  increases in positions closer to the center side in the short side direction of the diffusing plate  15   a.  If thermal expansion or thermal contraction occurs in the diffusing plate  15   a,  a screen center side tends to be bent or warped toward the cold cathode tube  17  in structure, but the larger number of support pins  29  are distributed on the screen center side, thereby allowing bending or warpage to be satisfactorily controlled. There are an optimum (smaller) number and arrangement of the lamp clips  18  to support the cold cathode tubes  17 . With the optimum predetermined arrangement, the lamp clips  18  with the support pin  29  eccentrically placed are placed so that the support pins  29  are placed closer to the reference line L 1 , thereby allowing bending or warpage of the diffusing plate  15   a  to be satisfactorily controlled. 
     In the inner surfaces of the bottom plates of the chassis  14  and the reflection sheet  23 , as shown in  FIG. 10 , mounting holes  32  and  33  and insertion holes  34  and  35  through which the mounting portions  30  and  31  are inserted are formed through the bottom plates in the thickness direction in positions to which the lamp clips  18  are to be mounted. The mounting portions  30  and  31 , the mounting holes  32  and  33 , and the insertion holes  34  and  35  will be described later in detail. 
     Next, detailed structures of components of the lamp clip  18  will be described. First, the main body  27  has an elongated substantially rectangular shape along the short side direction (Y-axis direction) of the chassis  14  as shown in  FIGS. 5 to 8 , and an intermediate portion is formed to be slightly narrower than opposite edge portions in the length direction. Thus, a surface area of the main body  27  is smaller than that in a case where a main body  27  has a constant width matching a width of a wide portion  27   a  over the entire length, and a ratio of a surface area of all the lamp clips  18  to a surface area of the entire reflection sheet  23  is small. Therefore, luminance unevenness is less likely to occur in the backlight unit  12  even if the reflection sheet  23  and the lamp clip  18  have different light reflectivities. In the wide portions  27   a  (wide first part) at the opposite ends in the main body  27 , a pair of lamp gripping portions  28  at opposite ends and the mounting portions  30  and  31  are provided, while in an intermediate narrow portion  27   b  (narrow second part), a pair of lamp gripping portions  28  closer to the middle and the support pin  29  are provided. The opposite wide portions  27   a  in the main body  27  have higher rigidity than the narrow portion  27   b,  and the mounting portions  30  and  31  are provided in the wide portions  27   a.  Therefore, the mounting portions  30  and  31  or the main body  27  is less likely to be damaged even if the mounting portions  30  and  31  interfere with the rims of the mounting holes  32  and  33  in the chassis  14  in mounting the lamp clip  18 . 
     Next, a sectional shape of the main body  27  cut along a thickness direction will be described. As shown in  FIG. 13 , the main body  27  includes a base portion  36  having a mounting surface (opposing surface) to the bottom plates of the chassis  14  and the reflection sheet  23 , and a raised portion  37  protruding from the base portion  36  toward the front side (toward the cold cathode tube  17  and the diffusing plate  15   a ) and having an sloped surface  38  on a surface thereof. 
     The base portion  36  has a substantially rectangular shape (block shape) with a substantially even thickness (height, size in the Z-axis direction) and a substantially constant width (size in the X-axis direction). Moreover, the base portion  36  has an elongated cross section. The width of the base of the raised portion  37  is substantially the same as the base portion  36 . The width (size of the short side that measures in the or X-axis direction of the body portion  27 ) gradually decreases toward a vertex that is a peak of the raised portion  37 . In other words, the raised portion  37  has a hill-like shape, the thickness of which at the midpoint (vertex P 1 ) of the width (size in the X-axis direction of the main body  27 )) is the largest and gradually decreases toward respective sides (bottoms on respective sides) in the width direction. Further in other words, the raised portion  37  has a hill-like shape that spreads toward a direction away from a central axis AX of the cold cathode tube  17 . Thus, the raised portion  37  is thinner on the entire sides (on the outer edge sides along the long side) than the center side. Namely, fairly smooth transition is provided between the base portion  36  and the raised portion  37 . 
     On the surface of the raised portion  37 , a pair of sloped surfaces  38  sloping downward from the midpoint of the width to the sides are integrally formed. The sloped surface  38  slopes so that a distance from the reflection sheet  23  gradually decreases from the middle position toward the opposite end positions in the width direction of the raised portion  37 , in other words, a distance from the diffusing plate  15   a  (cold cathode tube  17 ) gradually increases. Specifically, the raised portion  37  has a substantially isosceles triangular sectional shape, and has the pair of sloped surface  38  formed on the surface at the vertex P 1  in the middle in the width direction as a border. Specifically, the raised portion  37  has a symmetrical shape with respect to an axis of symmetry along the Z-axis direction passing through the middle position in the width direction. Thus, the sloped surfaces  38  have the same slope angle. An angle formed by the sloped surfaces  38  connected at the vertex P 1  of the raised portion  37  is an obtuse angle. A thickness T 1  at the vertex P 1  of the raised portion  37  is set to be larger than a thickness T 2  of the base portion  36 . As shown in  FIGS. 13 and 14 , the wide portions  27   a  at the opposite ends in the length direction of the main body  27  and the narrow portion  27   b  as the intermediate portion therebetween have different slope angles of the sloped surface  38  in the raised portion  37 , and an slope angle θ 1  in the wide portion  27   a  is smaller (more gentle) than a slope angle θ 2  in the narrow portion  27   b.  Also in a bottom section (surface of the main body  27  opposing the chassis  14  and the reflection sheet  23 ) of the base portion  36 , a pair of sloped surfaces  27   c  having a more gentle slope angle than the inclined surface  38  with a vertex in the middle position in the width direction is formed over the entire length. 
     As described above, the raised portion  37  having the sloped surfaces  38  is formed on the main body  27 , and thus the sloped surfaces  38  can satisfactorily reflect the light emitted from the cold cathode tube  17  toward the diffusing plate  15   a.  Also, the entire opposite edge portions in the width direction along the length direction of the raised portion  37  are thinner than the middle portion and there is little step from the base portion  36 , and thus there is few shadow portions in the raised portion  37 . This can provide uniform light reflection efficiency of the surface of the main body  27  as much as possible, and thus dark portions (shadow portions, shaded portions) in the main body  27  can be reduced as much as possible. The base portion  36  is provided on a back side of the raised portion  37 , but the thickness T 2  thereof is set to be smaller than the largest thickness T 1  (thickness T 1  at the vertex P 1 ) of the raised portion  37 , and also the sloped surfaces  38  of the raised portion  37  provide uniform light reflection efficiency, and thus opposite side surfaces in the width direction of the base portion  36  are not easily visually identified as dark portions. The sloped surfaces  38  without a curve are formed in the surface of the raised portion  37 , and thus dimensional accuracy of the raised portion  37  can be easily obtained in producing the lamp clip  18  by resin molding. 
     The raised portion  37  has a certain thickness in the middle portion in the width direction, but is extremely thin at the opposite edge portions in the width direction, and a light may pass through the thin portions. However, the base portion  36  is provided on the back side of the raised portion  37 , and has a thickness sufficient for blocking the light. The light does not pass through the opposite edge portions in the width direction of the main body  27 . Thus, even if the chassis  14  is provided on the back side of the opposite edge portions in the width direction of the main body  27  without the reflection sheet  23 , the chassis  14  (and the mounting holes  32  and  33 ) is less likely to be recognized as a dark portion from the front side. With the thin opposite edge portions in the width direction of the raised portion  37 , the main body  27  may have insufficient strength, but the base portion  36  is provided on the back side of the raised portion  37 , thereby ensuring sufficient strength and rigidity of the main body  27 . 
     Next, the support pin  29  that constitutes a support structure for the diffusing plate  15   a  will be described in detail. As shown in  FIG. 12 , the support pin  29  supports, from a back side, a screen middle portion rather than an outer peripheral edge part supported by the holder  20  or the like in the diffusing plate  15   a  to restrict the diffusing plate  15   a  from being bent or warped toward the cold cathode tube  17 . As shown in  FIG. 6 , the support pin  29  has a circular sectional shape when cut along a horizontal direction, and is tapered to have a gradually decreasing diameter from a root toward a tip as shown in  FIGS. 5 and 8 . Specifically, the support pin  29  has a substantially conical shape. A tip portion of the support pin  29  that can abut against the diffusing plate  15   a  has a rounded surface. In an outer peripheral surface of a root portion of the support pin  29 , a curved surface extending toward the main body  27  is formed and gently connected to the sloped surfaces  38  of the main body  27  without a step. The diameter of the root portion of the support pin  29  is larger than a width (size in the X-axis direction) of an arm portion  39  of the lamp gripping portion  28  described next, while the diameter of the tip portion is smaller than the width of the arm portion  39  of the lamp gripping portion  28 . A protruding height of the support pin  29  from the main body  27  is set to be higher than that of the lamp gripping portion  28 . As described above, the support pin  29  is placed in the position eccentric from the middle position in the length direction of the main body  27 , but placed in the middle position in the width direction. 
     The support pin  29  protrudes to the highest position in the lamp clip  18 . Thus, when the lamp clip  18  is attached to and detached from the chassis  14 , an operator can grip the support pin  29  and perform the operation, and the support pin  29  also functions as a console in attachment and detachment. 
     Next, the lamp gripping portion  28  that constitutes the support structure for the cold cathode tube  17  will be described in detail. As shown in  FIG. 12 , the lamp gripping portion  28  can support an intermediate portion of the cold cathode tube  17  between the ends thereof to which electrodes are provided, respectively. Namely, a light emitting portion of the cold cathode tube  17  is supported by the lamp gripping portion  28  from a back side at a height slightly above the reflection sheet  23 . The lamp gripping portion  28  has an open-end ring overall shape that opens toward the front. The lamp gripping portion  28  has a pair of arm portions  39  opposing each other. Between tip portions of the arm portions  39 , an opening  40  is present. The cold cathode tube  17  can be attached or detached along the Z-axis direction (thickness direction of the bottom plates of the chassis  14  and the reflection sheet  23 ) through the opening  40 . The arm portions  39  are cantilevered to rise from positions spaced apart in the length direction (Y-axis direction) in the top surface of the main body  27 , and curved into a substantially arc shape. A curvature of the arm portion  39  substantially matches a curvature of the outer peripheral surface of the cold cathode tube  17  to be mounted. A gap formed between the arm portions  39  and the cold cathode tube  17  has a substantially constant width in a circumferential direction when the cold cathode tube  17  is mounted. The arm portions  39  have a symmetrical shape with respect to an axis of symmetry along the Z-axis direction passing through the middle position in the Y-axis direction of the lamp gripping portion  28 . The arm portions  39  are elastically deformable in the width direction with a rising base end from the main body  27  as a pivot. Each arm portion  39  has a symmetrical shape with respect to an axis of symmetry along the Z-axis direction passing through the center position in the width direction (X-axis direction) as shown in  FIG. 8 . The arm portion  39  has a width smaller than the width of the main body  27 . The arm portion  39  has a gradually increasing width at a protruding base end and is gently connected to the main body  27 . Therefore, a smooth transition is provided. 
     On inner surfaces (surfaces opposing the cold cathode tube  17 ) of tip portions of the arm portions  39 , as shown in  FIG. 12 , holding protrusions  41  for retaining the cold cathode tube  17  in place are provided. The above-described opening  40  is present between the holding protrusions  41 . A space in the opening  40  is slightly narrower than the outer diameter of the cold cathode tube  17 . Thus, when the cold cathode tube  17  is attached and detached through the opening  40 , the arm portions  39  are pressed by the cold cathode tube  17  and elastically expanded and deformed. The holding protrusion  41  protrudes inward from the inner surface of the tip portion of the arm portion  39  (toward the central axis AX of the cold cathode tube  17 ), and is located on the front side (light output side) of the center C of the cold cathode tube  17  in the mounting state, that is, on a side in a removing direction of the cold cathode tube  17 . When mounted, the cold cathode tube  17  is supported at three points by the first support point S 1 , the second support point S 2  and the third support point S 3 . The first support point S 1  is located at the bottom section of the lamp gripping portion  28  directly below the center C of the cold cathode tube  17 . The second support point S 2  and the third support point S 3  are located at inner ends of the holding protrusions  41 . Between the support points S 1  and S 2 , a slight gap (clearance) extending circumferentially is present between the outer peripheral surface of the cold cathode tube  17  and the inner surface of the lamp gripping portion  28 . Such a slight gap is also present between the support points S 1  and S 3 . Lines connecting the support points S 1  to S 3  for the cold cathode tube  17  form an isosceles triangle. Angles formed by the line connecting the first support point S 1  and the center C of the cold cathode tube  17 , the line connecting the second support point S 2  and the center C, and the line connecting the third support point S 3  and the center C (not shown) are obtuse angle angles, respectively. 
     On outer surfaces of the distal ends of the arm portions  39 , guide portions  42  ( FIG. 15 ) for guiding the mounting operation of the cold cathode tube  17  are provided. The guide portions  42  are tapered to rise obliquely outward from the arm portions  39 . The guide portions  42  slope from protruding base ends toward protruding tips to be spaced apart from each other, and inner surfaces opposing the cold cathode tube  17  are sloped surfaces similarly sloping. Thus, the space between the inner surfaces that are opposing surfaces of the guide portions  42  gradually decreases toward the lower side in the drawing, that is, toward the mounting direction of the cold cathode tube  17 , while gradually increases toward the removing direction of the cold cathode tube  17 . Thus, the inner surfaces of the guide portions  42  can smoothly guide the mounting operation of the cold cathode tube  17 . The inner surfaces of the guide portions  42  are gently connected to the inner surfaces of the holding protrusions  41 . 
     As shown in  FIGS. 5 and 12 , the bottom section (including the first support point S 1 ) of the lamp gripping portion  28  between the arm portions  39  is set to be lower than the vertex P 1  of the sloped surfaces  38  (the peak of the raised portion  37 ) of the main body  27 . In other words, a recess having a predetermined width is formed in the top surface of the main body  27 , and the pair of arm portions  39  rise from either side of the recess to form the lamp gripping portion  28 . The recess is formed over the entire width direction (X-axis direction) of the main body  27 , and a depth thereof is set to be slightly smaller than the largest thickness of the raised portion  37 . Thus, in the main body  27 , the base portion  36  has an even thickness over the entire length, while the raised portion  37  is partially formed to be thin in a portion corresponding to each lamp gripping portion  28  in the length direction. It can be said that a bottom section  43  having the bottom section of the lamp gripping portion  28  is constituted by the base portion  36  and thin portions in the raised portion  37  ( FIG. 15 ). The bottom section  43  that is also a part of the main body  27  is formed to be wider than the arm portion  39  that constitutes the lamp gripping portion  28 . The cold cathode tube  17  is supported so that the bottom section is located in a position lower than the vertex P 1  of the main body  27 , that is, a position close to the reflection sheet  23  (position far from the diffusing plate  15   a ), and is suitable for reducing the thickness of the entire backlight unit  12 . The center C of the cold cathode tube  17  is located in a position higher than the vertexes P 1  and P 2  of the main body  27  (position on the front side). The bottom section of the lamp gripping portion  27  herein is a portion located in the lowest side in the Z-axis direction as a vertical direction in the inner surface of the lamp gripping portion  27  opposing the cold cathode tube  17 , and also a portion closest to the chassis  14  in the inner surface of the lamp gripping portion  27  opposing the cold cathode tube  17 . Further in other words, the bottom section of the lamp gripping portion  27  is a root portion of the lamp gripping portion  27  in the inner surface opposing the cold cathode tube  17 . 
     The bottom section of the lamp gripping portion  28  has a substantially straight shape with a fixed height in the length direction (Y-axis direction) of the main body  27 . As shown in  FIG. 15 , the surface of the bottom section is angled such that the lamp gripping portion  28  has a ridge shape that spreads toward a bottom away from the central axis AX of the cold cathode tube  17  in the width direction (X-axis direction, length direction of the cold cathode tube  17  (direction of the central axis AX)) of the main body  27 . Specifically, a gap G, the width of which differs from point to point in the length direction of the cold cathode tube  17  is formed between the surface of the cold cathode tube  17  and the inner surface of the lamp gripping portion  28 . More specifically, the bottom section  43  of the lamp gripping portion  28  has a ridge shape, the thickness of which at the midpoint of the width of the main body  27  is the largest and a gradually decreases toward the respective sides. The bottom section of the lamp gripping portion  28  is constituted by a pair of sloped surfaces  44  (relief surfaces) sloping downward from the midpoint or the width of the main body  27  toward the respective sides. Each sloped surface  44  is a sloping surface such that a distance from the reflection sheet  23  gradually decreases from the midpoint toward the side in the width direction of the main body  27 . In other words, a distance (space, clearance, gap G) from the cold cathode tube  17  (diffusing plate  15   a ) gradually increases. In other words, the gap G between the surface of the cold cathode tube  17  and the sloped surface  44  of the lamp gripping portion  28  gradually expands from the center of the lamp gripping portion  28  toward the sides along the length direction of the cold cathode tube  17 . The gap G is the largest at the edge of the main body  27 . Specifically, the raised portion  37  on the bottom section  43  of the lamp gripping portion  28  has a substantially isosceles triangular sectional shape. The pair of sloped surfaces  44  is formed on the bottom section that is the surface of the raised portion  37  on the either side of the vertex P 2  (including the first support point S 1 ) located at the midpoint of the width of the main body  27 . Specifically, the bottom section  43  of the lamp gripping portion  28  has a symmetrical shape with respect to the Z-axis direction passing through the midpoint. Thus, the sloped surfaces  44  have the same slope angle θ 3 . An angle formed by the sloped surfaces  44  connected at the vertex P 2  of the bottom section  43  of the lamp gripping portion  28  is an obtuse angle. The vertex P 2  of the bottom section  43  of the lamp gripping portion  28  is lower than the vertex P 1  of the raised portion  37  of the main body  27  as described above. Thus, the slope angle θ 3  of the sloped surface  44  formed on the bottom section  43  of the lamp gripping portion  28  is smaller than slope angles θ 1  and θ 2  (see  FIGS. 13 and 14 ) of the sloped surface  38  formed on the raised portion  37  of the main body  27  outside the lamp gripping portion  28 . 
     As shown in  FIG. 17 , the sloped surface  44  formed on the bottom section  43  of the lamp gripping portion  28  is formed to continuously extend to the inner surface of the arm portion  39  to form an extended sloped surface  45 . Further, as shown in  FIG. 16 , the extended sloped surface  45  is extended from the inner surface of the holding protrusion  41  to the inner surface and the outer surface of the guide portion  42 , and further extended to the outer surface of the arm portion  39 . Thus, the extended sloped surface  45  is formed over the entire inner surfaces and outer surfaces of the arm portion  39 , the holding protrusion  41 , and the guide portion  42 . Thus, the arm portion  39 , the holding protrusion  41 , and the guide portion  42  have gradually decreasing thicknesses from the middle position toward the opposite end positions in the width direction (X-axis direction). 
     In the state where the cold cathode tube  17  is mounted, as shown in  FIGS. 15 to 17 , the distance (space, gap) between the outer peripheral surface of the cold cathode tube  17  and the inner surface (surface opposing the cold cathode tube  17 ) of the lamp gripping portion  28  including the bottom section gradually increases from the middle position toward the opposite end positions (outward in the axial direction of the cold cathode tube  17 ) in the X-axis direction of the lamp gripping portion  28 . Thus, when the cold cathode tube  17  is lit, the light emitted from the cold cathode tube  17  passes through the gap (clearance) ensured between the cold cathode tube  17  and the lamp gripping portion  28 , is incident on the sloped surface  44  and the extended sloped surface  45 , and then is reflected and travels toward the diffusing plate  15   a.  The amount of light traveling toward the diffusing plate  15   a  can be increased to improve light taking efficiency from the cold cathode tube  17  as compared with a case where if the lamp gripping portion  28  has a straight inner surface, it is highly likely that the light emitted from the cold cathode tube  17  is incident on the inner surface of the lamp gripping portion  28  and is reflected, and then returned as it is to the cold cathode tube  17 . The extended sloped surface  45  is also formed on the outer surface of the lamp gripping portion  28 , and thus a light incident on the lamp gripping portion  28  from outside can be satisfactorily reflected toward the diffusing plate  15   a.  This can provide uniform light reflection efficiency of the lamp gripping portion  28 . The sloped surface  44  and the extended sloped surface  45  are formed on the inner and outer surfaces of the lamp gripping portion  28 , which is advantageous in mold opening in resin molding of the lamp clip  18 . 
     Next, the mounting portions  30  and  31  that constitute a holding structure for the lamp clip  18  on the chassis  14  will be described in detail together with the mounting holes  32  and  33  and the insertion holes  34  and  35  in the chassis  14  and the reflection sheet  23 . First, the holding structure will be briefly described. As shown in  FIG. 5 , the mounting portions  30  and  31  each has a hook shape along a back surface (plate surface) of the main body  27 , and the mounting portions  30  and  31  are inserted into the mounting holes  32  and  33  and the insertion holes  34  and  35  in the chassis  14  and the reflection sheet  23  and protruded on the back side of the chassis  14  (see  FIG. 20 ). In this state, the lamp clip  18  is slid along the length direction (Y-axis direction, plate surface direction of the bottom plates of the reflection sheet  23  and the chassis  14 ) of the main body  27 , and thus as shown in  FIG. 12 , the chassis  14  and the reflection sheet  23  can be held between the mounting portions  30  and  31  and the main body  27 . 
     As described above, the pair of mounting portions  30  and  31  are provided in the positions spaced apart from each other in the length direction of the main body  27  in the lamp clip  18 , and are referred to as the first mounting portion  30  and the second mounting portion  31 . The first mounting portion  30  is provided near the edge portion on the side opposite the support pin  29  in the length direction of the main body  27 , while the second mounting portion  31  is provided near the edge portion on the side of the support pin  29  in the length direction of the main body  27 . In the first mounting portion  30  and the second mounting portion  31 , a pair of gentle sloped surfaces  30   a  and a pair of gentle sloped surfaces  31   a,  respectively, are formed with a vertex in a middle position in the width direction over the entire circumference and entire region. Slope angles of the sloped surfaces  30   a  and  31   a  are substantially the same as that of the sloped surface  27   c  on the bottom section of the main body  27  described above. 
     Specifically, the first mounting portion  30  includes a base portion  46  protruding from a back side surface of the main body  27  toward the back side (side of the chassis  14  along the Z-axis direction), and a piece  47  substantially squarely bent from the tip of the base portion  46  and protruding (extending) along the length direction (Y-axis direction) of the main body  27 , and has a substantially L shape as viewed from the front. The base portion  46  is located on the back side of the lamp gripping portion  28  provided at the edge portion on the side opposite the support pin  29  in the length direction of the main body  27 , and more specifically, located in substantially the same position as the base end position of the arm portion  39  on the end side that constitutes the lamp gripping portion  28 . The base portion  46  is connected to the wide portion  27   a  of the main body  27 , and thus even if a force is applied to the main body  27  via the first mounting portion, the main body  27  is less likely to be deformed or damaged. The base portion  46  is provided in the substantially middle position in the width direction of the main body  27 . 
     The piece  47  is cantilevered to extend from the base portion  46  to the side opposite the support pin  29 , and has a length such that a distal end protrudes further laterally from the edge portion (front edge portion in a sliding direction) on the side opposite the support pin  29  of the main body  27 . In other words, the distal end (including a guide portion  48  described next) of the piece  47  protrudes outward from an outer end of the main body  27  on the plan view. The piece  47  has a rectangular shape as viewed from the back side, and has a size along the X-axis direction (width) set to be smaller than a size (length) along the Y-axis direction (sliding direction). In the piece  47 , a portion connected to the base portion  46  extends substantially in parallel with the main body  27 , while the distal end is bent to form an obtuse angle, and the bent distal end is the guide portion  48  that can guide the mounting operation to the chassis  14 . The guide portion  48  is sloped so that a distance from the main body  27  gradually increases toward the tip. In other words, the guide portion  48  is formed to be away from the main body  27  toward the tip, and has a substantially even thickness over the entire length, and thus both front and back surfaces thereof form guide surfaces  48   a.  A root position of the guide portion  48  is located outside the end surface in the length direction of the main body  27 . The base portion  46  and the piece  47  have substantially the same width, which is smaller than the width of the main body  27 . 
     As shown in  FIG. 11 , the first mounting hole  32  and the first insertion hole  34  through which the first mounting portion  30  having the above-described configuration can be inserted are formed through the chassis  14  and the reflection sheet  23  in the thickness direction. The first mounting hole  32  formed in the chassis  14  has a rectangular shape on the plan view, and has a width and a length (size in a direction perpendicular to the Z-axis direction (inserting direction of the first mounting portion  30  into the first mounting hole  32 ) set to be substantially the same as or larger than those of the first mounting portion  30 . Meanwhile, the first insertion hole  34  formed in the reflection sheet  23  has a rectangular shape on the plan view like the first mounting hole  32 , and has a width and a length set to be much larger than those of the first mounting hole  32 . A difference in size between the first mounting hole  32  and the first insertion hole  34  is set to be the same as or larger than an assumed maximum value of a displacement amount that may occur between the reflection sheet  23  and the chassis  14  when the reflection sheet  23  is assembled to the chassis  14 . Thus, the first mounting hole  32  is reliably placed inside the first insertion hole  34  to avoid the reflection sheet  23  from covering the first mounting hole  32 . Conversely, the rim of the first mounting hole  32  in the chassis  14  is not covered by the reflection sheet  23 , and directly faces the back surface of the main body  27  without via the reflection sheet  23 . 
     As shown in  FIG. 20 , the first mounting portion  30  is inserted into the first insertion hole  34  and the first mounting hole  32  and protruded on the back side of the chassis  14 , and the main body  27  is slid in a protruding direction (to the right in  FIG. 20  along the Y-axis direction) of the piece  47 . Then, as shown in  FIG. 12 , the piece  47  is placed on the back side of the front portion in the sliding direction (mounting direction) of the rim of the first mounting hole  32 . Thus, the reflection sheet  23  and the chassis  14  are held between the edge portion in the length direction of the main body  27  and the piece  47  of the first mounting portion  30 . Held portions of the reflection sheet  23  and the chassis  14  held between the main body  27  and the first mounting portion  30  are rims of the first mounting hole  32  and the first insertion hole  34  on the side opposite a locking hole  52  described next. The first insertion hole  34  has a width set to be smaller than the width of the main body  27 , and also a distance from a lateral end surface of the support pin  29  in the rear end position in the sliding direction of the main body  27  to the base portion  46  is larger than a sliding amount in mounting. Thus, in the mounting state, the first mounting hole  32  and the first insertion hole  34  are covered (blocked) by the main body  27  and thus the holes  32  and  34  are less likely to be exposed to the outside of the main body  27 . 
     The first mounting portion  30  protrudes laterally from the edge portion of the main body  27 , and thus when the lamp clip  18  is mounted to the chassis  14 , the distal end of the first mounting portion  30  can be previously inserted into the first mounting hole  32  and the operation can be performed. In the mounting operation, as shown in  FIG. 19 , the body portion  27  is sloped so that the edge portion provided with the first mounting portion  30  is lowered. At this time, the support pin  29  gripped by the operator is provided eccentrically toward the edge portion on the side opposite the first mounting portion  30  previously inserted of the main body  27 , thereby further improving workability in mounting the main body  27  to the chassis  14  while tilting the main body  27 . 
     As shown in  FIG. 5 , the second mounting portion  31  has a substantially L shape on the front view like the first mounting portion  30 , and includes a base portion  49  protruding from the back side surface of the main body  27  toward the back side (side of the chassis  14  along the Z-axis direction), and a piece  50  substantially squarely bent from the tip of the base portion  49  and protruding (extending) along the length direction of the main body  27 . The base portion  49  is located in a substantially intermediate position between the lamp gripping portion  28  located at the edge portion on the side of the support pin  29  in the length direction of the main body  27  and the support pin  29 . Specifically, the second mounting portion  31  is placed on the side opposite the first mounting portion  30  via the support pin  29  in the length direction of the main body  27 . The base portion  49  is connected to the wide portion  27   a  of the main body  27  like the base portion  46  of the first mounting portion  30 . A protruding size of the base portion  49  is substantially the same as that of the base portion  46  of the first mounting portion  30 . The base portion  49  is provided in a substantially middle position in the width direction of the main body  27 , that is, the same position as the base portion  46  of the first mounting portion  30 . 
     The piece  50  is cantilevered to extend from the base portion  49  toward the support pin  29 , and has a length such that a distal end thereof is placed on the substantially directly back side of the support pin  29 . The piece  50  is formed to be substantially parallel to the main body  27  over the entire length, and a locking protrusion  51  is provided on a surface of a distal end of the piece  50  opposing the main body  27 . The locking protrusion  51  protrudes from the piece  50  so as to be close to the main body  27 , and a tapered surface  51   a  is formed on a surface opposing the main body  27 . The tapered surface  51   a  is formed continuously to the tip of the piece  50 , and thus the piece  50  is tapered. A surface of the locking protrusion  51  opposing the base portion  49  is a vertical surface substantially in parallel with an outer surface of the base portion  49 , and substantially straight along the direction (Z-axis direction) perpendicular to the sliding direction (Y-axis direction) of the lamp clip  18  with respect to the chassis  14 , and this surface is a locking surface  51   b  to the chassis  14 . The piece  50  has a rectangular shape as viewed from the back side, and a size (width) along the X-axis direction is set to be smaller than a size (length) along the Y-axis direction (sliding direction). The piece  50  has a length larger than that of the piece  47  or the first mounting hole  32  in the first mounting portion  30 . The base portion  49  and the piece  50  have substantially the same width, which is set to be smaller than the width of the main body  27 . 
     As shown in  FIG. 11 , the second mounting hole  33  and the second insertion hole  35  through which the second mounting portion  31  having the above-described configuration can be inserted are formed through the chassis  14  and the reflection sheet  23  in the thickness direction. Further, the locking hole  52  in which the locking protrusion  51  can be locked is formed through the chassis  14  in the thickness direction. The second mounting hole  33  formed in the chassis  14  has a rectangular shape on the plan view, and has a width and a length (size in a direction perpendicular to the Z-axis direction (inserting direction of the second mounting portion  31  into the second mounting hole  33 )) set to be substantially the same as or slightly larger than the second mounting portion  31 . The second mounting hole  33  has a length set to be larger than that of the first mounting hole  32  or the first mounting portion  30 . The locking hole  52  is formed in a position between the first mounting hole  32  and the second mounting hole  33  and adjacent to the second mounting hole  33  with a predetermined space in the length direction. The locking hole  52  has a rectangular shape on the plan view, and has a width and a length set to be substantially the same as or slightly larger than those of the locking protrusion  51  of the second mounting portion  31 . Meanwhile, the second insertion hole  35  formed in the reflection sheet  23  has a rectangular shape on the plan view, and has a width and a length set to be much larger than the sum of the widths and lengths of the second mounting hole  33  and the locking hole  52  so that the second insertion hole  35  can collectively surround the second mounting hole  33  and locking hole  52 . A difference in size between the second mounting hole  33  and the locking hole  52  and the second insertion hole  35  is set to be the same as or larger than an assumed maximum value of a displacement amount that may occur between the reflection sheet  23  and the chassis  14  when the reflection sheet  23  is assembled to the chassis  14 . Thus, the second mounting hole  33  and the locking hole  52  are reliably placed inside the second insertion hole  35  to avoid the reflection sheet  23  from covering the second mounting hole  33  or the locking hole  52 . Conversely, the rims of the second mounting hole  33  and the locking hole  52  in the chassis  14  are not covered by the reflection sheet  23 , and directly face the back surface of the main body  27  without via the reflection sheet  23 . 
     As shown in  FIG. 20 , the second mounting portion  31  is inserted into the second insertion hole  35  and the second mounting hole  33  and protruded on the back side of the chassis  14 , and the main body  27  is slid in a protruding direction (to the right in  FIG. 20  along the Y-axis direction) of the piece  50 . Then, as shown in  FIG. 12 , the piece  50  is placed on the back side of the front portion in the sliding direction (mounting direction) of the rim of the second mounting hole  33 , and the locking protrusion  51  at the distal end enters the locking hole  52  and is locked to the hole edge. Thus, the chassis  14  is held between the connecting portion of the main body  27  to the support pin  29  and the piece  50  of the second mounting portion  31 , and the locking surface  51   b  of the locking protrusion  51  is locked to the hole edge of the locking hole  52  to control movement to the back side in the mounting direction (removing direction). A held portion of the chassis  14  held between the main body  27  and the second mounting portion  31  is a portion between the second mounting hole  33  and the locking hole  52 . The second insertion hole  35  has a width smaller than the width of the main body  27 , and also a distance from a lateral end surface on the side of the support pin  29  in the rear end position in the sliding direction of the main body  27  to the base portion  49  is larger than a sliding amount in mounting. Thus, in the mounting state, the second mounting hole  33  and the second insertion hole  35  are covered (blocked) by the main body  27  and thus the holes  33  and  35  are less likely to be exposed to the outside of the main body  27 . 
     The lamp clip  18  has the above-described design in which the mounting direction to the chassis  14  is specified so that the support pin  29  eccentrically placed is directed toward the reference line L 1  (eccentric toward the reference line L 1 ). Thus, the lamp clip  18  has a control structure for controlling mounting in a direction opposite the specified mounting direction. The control structure will be described below in detail. 
     As shown in  FIG. 7 , the first mounting portion  30  and the second mounting portion  31  have different widths W 1  and W 2  (sizes in parallel with and perpendicular to the sliding direction), and correspondingly thereto, as shown in  FIG. 11 , the first mounting hole  32  and the second mounting hole  33  in the chassis  14  have different widths W 3  and W 4  (sizes in parallel with and perpendicular to the sliding direction). Specifically, the width W 1  of the first mounting portion  30  is larger than the width W 2  of the second mounting portion  31 , and correspondingly thereto, the width W 3  of the first mounting hole  32  is larger than the width W 4  of the second mounting hole  33 . The width W 1  of the first mounting portion  30  is larger than the width W 4  of the second mounting hole  33 , and the width W 3  of the first mounting hole  32  is larger than the width W 2  of the second mounting portion  31 . The widths of the first insertion hole  34  and the second insertion hole  35  in the reflection sheet  23  have the same relationship as the first mounting hole  32  and the second mounting hole  33  in the chassis  14 . 
     Thus, in the case where the lamp clip  18  is mounted to the chassis  14  in the mounting direction opposite the normal direction, the first mounting portion  30  is about to enter the second mounting hole  33  and the second mounting portion  31  is about to enter the first mounting hole  32  with the mounting portions  30  and  31  being in misalignment with the originally corresponding mounting holes  32  and  33 . However, as shown in  FIG. 21 , the width W 1  of the first mounting portion  30  is larger than the width W 4  of the second mounting hole  33 , and thus the edge portion in the width direction of the first mounting portion  30  interferes with the edge portion in the width direction in the rim of the second mounting hole  33  to control the mounting operation with the main body  27  being raised from the chassis  14 . Therefore, the lamp clip  18  is less likely to be mounted in the wrong mounting direction. It can be said that the edge portion in the width direction of the rim of the second mounting hole  33  functions as a mounting control portion that controls mounting of the lamp clip  18 . 
     This embodiment has the above-described structure, and an operation thereof will be described next. The liquid crystal panel  11  and the backlight unit  12  are separately produced and assembled to each other using the bezel  13  or the like to produce the liquid crystal display device  10  shown in  FIGS. 3 and 4 . Then, an assembling operation of the backlight unit  12 , particularly, the mounting operation of the lamp clip  18  will be described in detail. 
     When the reflection sheet  23  is provided on the inside of the chassis  14 , as shown in  FIG. 10 , the corresponding mounting holes  32  and  33  and the locking hole  52  are aligned to face the insertion holes  34  and  35 , and then each lamp clip  18  is mounted to the chassis  14 . The mounting direction of the lamp clip  18  to the chassis  14  is different depending on which of the regions A 1  and A 2  of the chassis  14  the lamp clip  18  is mounted to. Specifically, the mounting directions of the lamp clip  18  are set in opposite directions in the first region A 1  and the second region A 2  at the reference line L 1  on the chassis  14  as a border, a first mounting direction (mounting direction with the support pin  29  being eccentric downward in  FIG. 9 ) is set in the first region A 1 , and a second mounting direction opposite the first mounting direction (mounting direction with the support pin  29  being eccentric upward in  FIG. 9 ) is set in the second region A 2 . Thus, in mounting the lamp clip  18 , the mounting direction corresponding to the mounting position to the chassis  14  needs to be selected. 
     The case where the lamp clip  18  is mounted in the normal mounting direction will be described. When the support pin  29  eccentrically placed on the main body  27  is gripped, the lamp clip  18  is moved from the state shown in  FIG. 18  in the Z-axis direction so as to be close to the chassis  14 , the main body  27  is positioned so that the edge portion on the side opposite the support pin  29  is lowered, and the first mounting portion  30  protruding from the edge portion forward in the mounting direction is previously inserted into the first insertion hole  34  and the first mounting hole  32 . At this time, as shown in  FIG. 19 , the guide surface  48   a  of the guide portion  48  formed at the front edge portion of the first mounting portion  30  is brought into slide contact with the hole edge part of the first mounting hole  32  to achieve smooth insertion. Then, the main body  27  is displaced to be parallel to the bottom plates of the chassis  14  and the reflection sheet  23 , and the second mounting portion  31  is inserted into the second insertion hole  35  and the second mounting hole  33 . If the piece  47  of the first mounting portion  30  protrudes on the back side of the chassis  14 , the main body  27  may be slightly slid in the extending direction of the pieces  47  and  50  before the second mounting portion  31  is inserted. 
     As shown in  FIG. 20 , when the main body  27  is slid in the extending direction of the pieces  47  and  50  (to the right in  FIG. 20  along the Y-axis direction) from the state where the pieces  47  and  50  of the first mounting portion  30  and the second mounting portion  31  protrude on the back side of the chassis  14 , the pieces  47  and  50  oppose the back surface of the chassis  14 , and abut or are brought close to the front portion in the mounting direction of the hole edge parts of the mounting holes  32  and  33 . In this process, the locking protrusion  51  of the second mounting portion  31  rides up onto the back surface of the chassis  14 , and the piece  50  is once elastically deformed. When the lamp clip  18  is slid a predetermined distance, as shown in  FIG. 12 , the locking protrusion  51  enters the locking hole  52  and the piece  50  elastically returns, and the locking surface  51   b  of the locking protrusion  51  is locked to the rim of the locking hole  52 . Therefore, the lamp clip  18  is less likely to be accidentally moved in the direction opposite the mounting direction (removing direction, to the left in  FIG. 12 ). At this time, the piece  50  returns and abuts against the back surface of the chassis  14  and produces sound, and thus the operator can obtain strong click feeling, and can reliably slide the lamp clip  18  to the normal mounting position (retaining position). 
     In this state, the reflection sheet  23  and the chassis  14  are held between the pieces  47  and  50  of the mounting portions  30  and  31  and the main body  27 , and thus the lamp clip  18  is held in the mounting state to the chassis  14 . In this state, even if vibration or the like is applied and a force to displace the lamp clip  18  along the Z-axis direction to the front side is applied, the pieces  47  and  50  of the mounting portions  30  and  31  engage the back surface of the chassis  14  to control the displacement of the lamp clip  18  in the Z-axis direction. The pair of mounting portions  30  and  31  are inserted into the mounting holes  32  and  33  to restrict rotation of the lamp clip  18 . 
     Meanwhile, a case where the lamp clip  18  is mounted in the direction opposite the normal mounting direction (a mounting state different from a normal state) will be described. Even if a user mistakenly tries to mount the lamp clip  18  in the wrong mounting direction, the mounting portions  30  and  31  having the different widths W 1  and W 2  are in misalignment with the corresponding mounting holes  32  and  33 . Thus, as shown in  FIG. 21 , the edge portion in the width direction of the first mounting portion  30  having the comparatively (relatively) large width W 1  (relatively larger first mounting portion  30 ) reliably interferes with the edge portion in the width direction of the rim of the second mounting hole  33  having the comparatively (relatively) small width W 4  (relatively smaller second mounting hole  33 ). Further, the second mounting portion  31  and the second mounting hole  33  have the lengths longer than the lengths of the first mounting portion  30  and the first mounting hole  32 , and thus the edge portion in the length direction of the second mounting portion  31  interferes with the edge portion in the length direction of the rim of the first mounting hole  32 . Thus, the first mounting portion  30  cannot be inserted into the second mounting hole  33 , and the main body  27  is raised from the chassis  14  and the reflection sheet  23 . Thus, the operator can reliably find the wrong mounting direction. 
     When the lamp clip  18  is mounted in the mounting direction opposite the normal direction, and the lamp clip  18  is displaced from a position to which the lamp clip  18  is to be mounted in the chassis  14  in the length direction of the main body  27  (in the short side direction of the chassis  14 ), the first mounting portion  30  may enter the first mounting hole  32  or the second mounting portion  31  may enter the second mounting hole  33 . However, in that case, the other mounting portion different from one mounting portion that may enter the hole is in misalignment with the corresponding mounting hole, and the other mounting portion is placed on the reflection sheet  23  and the main body  27  is raised, and thus the operator can find the wrong mounting direction. In other words, the mounting holes  32  and  33  arranged in the short side direction of the chassis  14  are placed in misalignment with the mounting portions  30  and  31  of the lamp clip  18  when the lamp clips  18  to be mounted to positions adjacent to each other in the short side direction are mounted in the mounting direction opposite the normal direction, and the lamp clip  18  is displaced from the position to which the lamp clip  18  is to be mounted in the length direction of the main body  27 . 
     As described above, mounting of each lamp clip  18  is controlled if the mounting direction (mounting position, mounting state) does not correspond to the region A 1  or A 2  of the chassis  14 . Thus, with all the lamp clips  18  being mounted to the chassis  14 , as shown in  FIG. 9 , the support pins  29  of the lamp clips  18  are reliably aligned eccentrically toward the reference line L 1 . Thus, when the diffusing plate  15   a  is mounted later, the screen center side of the diffusing plate  15   a  can be satisfactorily supported by the support pins  29  to restrict the diffusing plate  15   a  from being bent or warped toward the cold cathode tube  17  when thermal expansion or thermal contraction occurs. In particular, in this embodiment, the liquid crystal panel  11  is directly received by the diffusing plate  15   a  and the optical sheet  15   b  to reduce a thickness of the liquid crystal display device  10 , and thus a slight distance or little distance is ensured between the liquid crystal panel  11  and the diffusing plate  15   a  and the optical sheet  15   b.  In such a case, outer edge parts of the diffusing plate  15   a  and the optical sheet  15   b  tend to be easily held and constrained between the holder  20  and the liquid crystal panel  11 . This easily causes thermal expansion and contraction eccentrically (concentrically) on the screen center side, but the support pins  29  are collectively provided on the screen center side as described above to satisfactorily control warpage or bending of the diffusing plate  15   a,  which is extremely suitable for reducing the thickness of the liquid crystal display device  10 . Conversely, if mounting in the mounting direction opposite the normal direction is allowed, the support pins  29  are eccentrically provided on the side away from the reference line L 1 , which may reduce a supporting function of the diffusing plate  15   a,  but such a situation can be reliably avoided. 
     After the lamp clip  18  is mounted as described above, each cold cathode tube  17  is mounted to each lamp gripping portion  28 , and then the holder  20  is mounted. Then, the diffusing plate  15   a  and the optical sheet  15   b  are stacked, and the liquid crystal panel  11  is further placed from the front side, and the bezel  13  is assembled, and thus the liquid crystal display device  10  is assembled. 
     Next, an operation when each cold cathode tube  17  in the backlight unit  12  is lit will be described. As shown in  FIG. 12 , a linear light emitted from each cold cathode tube  17  is applied directly to the diffusing plate  15   a  or reflected by the reflection sheet  23  or the lamp clip  18  and then applied to the diffusing plate  15   a,  converted into a planar light in the process of passing through the diffusing plate  15   a  and the optical sheet  15   b,  and then applied to the liquid crystal panel  11 . Next, a relationship between the light emitted from the cold cathode tube  17  and the lamp clip  18  will be described in detail. 
     The cold cathode tube  17  is gripped by the lamp gripping portion  28 , and supported at the three points by the first support point S 1  located directly below the center C of the cold cathode tube  17  and the second support point S 2  and the third support point S 3  on the holding protrusions  41  on the bottom section of the lamp gripping portion  28 . Between the support points S 1  to S 3 , a circumferential gap is ensured between the outer peripheral surface of the cold cathode tube  17  and the inner surface of the arm portion  39 . Thus, with decreasing thickness of the backlight unit  12 , the cold cathode tube  17  is held in a position lower than the vertex P 1  of the main body  27 , and even if a slight distance is ensured between the cold cathode tube  17  and the reflection sheet  23 , the light emitted from the cold cathode tube  17  can be efficiently emitted to the outside of the lamp gripping portion  28  through the gap. 
     In the bottom section between the arm portions  39  in the inner surface of the lamp gripping portion  28 , as shown in  FIG. 15 , the pair of sloped surfaces  44  are formed having the highest middle position (vertex P 2 ) in the length direction (X-axis direction) of the cold cathode tube  17  and the lowest opposite end positions, and a gap between the sloped surface  44  and the cold cathode tube  17  extends from the middle position toward the opposite end positions, that is, has a skirt shape. Thus, the light emitted form the cold cathode tube  17  toward the bottom section (side of the chassis  14 , directly below, directly back) of the lamp gripping portion  28  passes through the gap extending outward of the lamp gripping portion  28  in the length direction of the cold cathode tube  17  and is efficiently emitted to the outside of the lamp gripping portion  28 . At this time, the light emitted from the cold cathode tube  17  toward the bottom section of the lamp gripping portion  28  passes through the gap and is incident on the sloped surface  44 , and is thus angled to be reflected outward of the lamp gripping portion  28  in the length direction of the cold cathode tube  17 , and thus few light is returned into the cold cathode tube  17  to further improve light taking efficiency. 
     The bottom section  43  of the lamp gripping portion  28  has a symmetrical shape, and the sloped surfaces  44  have the same slope angle. Therefore, uniform light distribution is provided on the light and left side of the vertex P 2  of the sloped surfaces  44  in  FIG. 5  between the cold cathode tube  17  and the bottom section  43 . This is further effective for reducing luminance unevenness. Further, the raised portion  37  on the bottom section  43  of the lamp gripping portion  28  has a triangular sectional shape, and thus the sloped surface  44  formed over the entire surface of the raised portion  37  of the bottom section  43  can reflect the light toward the diffusing plate  15   a,  and the slope angle of the sloped surface  44  can be more gentle than a case where the raised portion  37  has a trapezoidal sectional shape or the like, which is further suitable for providing uniform light reflection efficiency. 
     Further, the extended sloped surface  45  having the same slope as the sloped surface  44  is formed over the entire inner surfaces of the arm portion  39 , the holding protrusion  41 , and the guide portion  42  besides the bottom section of the lamp gripping portion  28 , and thus a gap gradually extending from the middle position toward the opposite end positions in the length direction of the cold cathode tube  17  is formed between the extended sloped surface  45  and the cold cathode tube  17 . Thus, the light emitted from the cold cathode tube  17  toward the bottom section and also lights emitted to both the lateral sides or the front side can be efficiently emitted through the gap between the cold cathode tube  17  and the extended sloped surface  45  to the outside of the lamp gripping portion  28 , and the light having passed through the gap is incident on the extended sloped surface  45  and angled to be reflected outward of the lamp gripping portion  28  in the length direction of the cold cathode tube  17 , thereby further improving light taking efficiency. 
     In addition, between the lamp gripping portions  28  in the lamp clip  18  (between the cold cathode tubes  17 ), as shown in  FIGS. 13 and 14 , the raised portion  37  having the sloped surfaces  38  having downward slopes from the middle position to the opposite end positions in the width direction are formed in the main body  27 , and thus the light emitted from the cold cathode tube  17  is incident on the sloped surfaces  38  and satisfactorily reflected toward the diffusing plate  15   a.  At this time, the light reflected by the sloped surface  38  is angled outward of the main body  27  in the length direction of the cold cathode tube  17 , which is suitable for reducing luminance unevenness. Also, the opposite edge portions in the width direction along the length direction of the raised portion  37  are thinner over the entire region than the middle portion and there is little step from the base portion  36 , and thus there is few shadow portions (opposite end surfaces in the width direction of the raised portion  37 ) in the raised portion  37 , and the raised portion  37  is hardly visually identified as a shadow. Further, the raised portion  37  has a triangular sectional shape, and thus the sloped surfaces  38  formed over the entire surface of the raised portion  37  can reflect the light toward the diffusing plate  15   a.  Also, the slope angle of the sloped surface  38  can be more gentle than a case where the raised portion  37  has a trapezoidal sectional shape or the like, which is further suitable for providing uniform light reflection efficiency. The thickness T 1  at the vertex P 1  that is the peak of the raised portion  37  is larger than the thickness T 2  of the base portion  38 . Therefore, a large amount of light is reflected by the raised portion  37  and the base portion  38  is less likely to be recognized as a dark portion. This can provide uniform light reflection efficiency of the surface of the main body  27  as much as possible and thus dark portions in the main body  27  are reduced as much as possible. 
     Further, the base portion  36  having a predetermined thickness is formed on the back side of the raised portion  37 . Even if the light is incident on the thin opposite edge portions in the width direction in the raised portion  37 , the light does not pass through the main body  27 . On the back side of portions in the main body  27  corresponding to the insertion holes  34  and  35  in the reflection sheet  23 , as shown in  FIG. 13 , the chassis  14  is directly placed without via the reflection sheet  23  because the insertion holes  34  and  35  in the reflection sheet  23  are slightly larger than the mounting holes  32  and  33  in the chassis  14 . Thus, if the light can pass through the main body  27 , the chassis  14  having lower light reflectivity than the reflection sheet  23  may be visually identified as a dark portion. However, as described above, the base portion  36  having the sufficient thickness is formed on the back side of the thin portion of the raised portion  37  and covers the mounting holes  32  and  33  and the insertion holes  34  and  35 . Therefore, the light does not pass through the main body  27  and the portions of the chassis  14  inside the insertion holes  34  and  35  are less likely to be recognized as a dark portion from the front side. 
     As described above, according to this embodiment, taking efficiency of the light emitted from the cold cathode tube  17  is extremely improved, and parts of the lamp clip  18  and the chassis  14  are less likely to be recognized as a dark portion. Thus, when a distance between the liquid crystal panel  11  and the diffusing plate  15   a  and the optical sheet  15   b,  a distance between the diffusing plate  15   a  and the cold cathode tube  17  and the lamp clip  18 , and a distance between the cold cathode tube  17  and the reflection sheet  23  are reduced with decreasing thickness of the backlight unit  12 , luminance unevenness is less likely to occur and thus even an ultrathin liquid crystal display device  10  can provide satisfactory display performance. 
     A diameter of the cold cathode tube  17  used in this embodiment is 4.0 mm, a distance between the cold cathode tube  17  and the reflection sheet  23  is 0.8 mm, a distance between the adjacent cold cathode tubes  17  is 16.4 mm, and a distance between the cold cathode tube  17  and the diffusing plate  15   a  is 2.7 mm. As such, the thicknesses of the components are reduced in the backlight unit  12 , and the distance between the cold cathode tube  17  and the diffusing plate  15   a  and the distance between the cold cathode tube  17  and the reflection sheet  23  are particularly reduced. By the reduction in thickness of the backlight unit  12 , the thickness of the liquid crystal display device  10  (that is, the thickness from the surface of the liquid crystal panel  11  to the back surface of the backlight unit  12 ) is 16 mm, and the thickness of the television receiver apparatus TV (that is, the thickness from the surface of the front side cabinet Ca to the back surface of the back side cabinet Cb) is 34 mm, and a thin television receiver apparatus is achieved. 
     Second Embodiment 
     A second embodiment of the present invention will be described with reference to  FIG. 22 . In the second embodiment, a position of a reference line L 1 -A set in a chassis  14 -A is changed. In the second embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -A added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As described in the first embodiment, a diffusing plate (not shown) integrated into a backlight unit  12 -A may be thermally expanded or contracted, and which portion in a plane thereof is easily expanded or contracted tends to depend on thermal distribution when the backlight unit  12 -A is lit or extinguished. With uniform thermal distribution, the diffusing plate is easily expanded or contracted on a screen center side, but with uneven thermal distribution, a portion that is easily expanded or contracted in the diffusing plate may be shifted from the screen middle. Thus, thermal distribution of the backlight unit  12 -A is analyzed to identify the portion that is easily expanded or contracted in the diffusing plate, and according thereto, the position of the reference line L 1 -A as a reference for eccentrically placing a support pin  29 -A on each lamp clip  18 -A can be set. 
     Specifically, as shown in  FIG. 22 , when the diffusing plate is easily expanded or contracted in an upper position in the drawing than a middle position in a short side direction of the chassis  14 -A, the reference line L 1 -A is shifted upward in the drawing from the middle position in the short side direction. It is sufficient that in the chassis  14 -A, an upper side in  FIG. 22  of the reference line L 1 -A eccentrically placed is referred to as a first region A 1 -A where a first lamp clip group  18 A-A is provided, and a lower side in the drawing is referred to as a second region A 2 -A where a second lamp clip group  18 B-A is provided. Thus, each support pin  29 -A is placed closer to the portion that is easily expanded or contracted in the diffusing plate, thereby reliably restricting bending or warpage of the diffusing plate. At this time, the number of lamp clips  18 -A may be different between the first lamp clip group  18 A-A and the second lamp clip group  18 B-A. As described above, a supporting state for the diffusing plate can be optimized correspondingly to design of the backlight unit  12 -A. 
     In the backlight unit  12 -A, convection that is rising of heated air may occur with lighting, and in that case, an upper portion of the backlight unit  12 -A in a vertical direction in using a liquid crystal display device tends to be higher in temperature than a lower portion. The diffusing plate tends to be more significantly expanded or contracted in a high temperature region, and thus in such a case, the reference line L 1 -A is effectively shifted vertically upward in using the liquid crystal display device. 
     Third Embodiment 
     A third embodiment of the present invention will be described with reference to  FIG. 23  or  24 . In the third embodiment, positions of a cold cathode tube  17 -B or the like and a reference line L-B in a chassis  14 -B are changed. In the third embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -B added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 23 , the cold cathode tube  17 -B is mounted to the chassis  14 -B with a length direction matching a short side direction of the chassis  14 -B (diffusing plate), and a plurality of cold cathode tubes  17 -B are arranged in parallel. A lamp clip  18 -B for holding each cold cathode tube  17 -B is mounted to the chassis  14 -B with a length direction of a main body  27 -B matching a long side direction of the chassis  14 -B (diffusing plate). The reference line L 1 -B as a reference of a mounting direction of each lamp clip  18 -B on which a support pin  29 -B is eccentrically placed is set to cross along the short side direction through a middle position in the long side direction of the chassis  14 -B (diffusing plate). Thus, also for a liquid crystal display device used with the long side direction of the chassis  14 -B matching a vertical direction of the liquid crystal display device, bending or warpage of the diffusing plate can be satisfactorily controlled. 
     As shown in  FIG. 24 , a position of a reference line L 1 -B′ may be, of course, shifted from a middle position in a long side direction of a chassis  14 -B′ by applying a design idea described in the second embodiment. 
     Fourth Embodiment 
     A fourth embodiment of the present invention will be described with reference to  FIGS. 25 to 28 . In the fourth embodiment, a structure for controlling mounting of a lamp clip  18 -C in a wrong direction is changed. In the fourth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -C added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A first mounting portion  30 -C and a second mounting portion  31 -C in the lamp clip  18 -C have substantially the same width as shown in  FIG. 25 . From opposite side surfaces of a piece  47 -C of the first mounting portion  30 -C, a pair of control portions  53  are formed to laterally protrude. Thus, the first mounting portion  30 -C is formed so that portions corresponding to the control portions  53  are partially wide. Meanwhile, a first mounting hole  32 -C and a second mounting hole  33 -C in a chassis  14 -C have the same width matching the mounting portions  30 -C and  31 -C as shown in  FIG. 26 , but the first mounting hole  32 -C is formed with notches  54  corresponding to the control portions  53  and formed to be partially wide. 
     Thus, when the lamp clip  18 -C is to be mounted in a mounting direction different from a normal direction, the control portions  53  of the first mounting portion  30 -C interfere with a rim of the second mounting hole  33 -C. This can reliably control mounting of the lamp clip  18 -C in a wrong direction. 
     As a variation aspect of a structure for controlling mounting of the lamp clip  18 -C in a wrong direction, for example, as shown in  FIGS. 27 and 28 , a second mounting portion  31 -C′ and a second mounting hole  33 -C′ may have larger widths than a first mounting portion  30 -C′ and a first mounting hole  32 -C′. 
     Fifth Embodiment  
     A fifth embodiment of the present invention will be described with reference to  FIG. 29 . In the fifth embodiment, a sectional shape of a main body  27 -D is changed. In the fifth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -D added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A main body  27 -D includes, as shown in  FIG. 29 , a base portion  36 -D having a block-shaped sectional shape, and a raised portion  37 -D having a triangular sectional shape placed on the base portion  36 -D, and a thickness T 3  at a vertex P 1  of the raised portion  37 -D is set to be smaller than a thickness T 4  of the base portion  36 -D. The sum of the thickness T 3  of the raised portion  37 -D and the thickness T 4  of the base portion  36 -D (thickness of the main body  27 -D) is set to be the same as the sum of the thickness T 1  of the raised portion  37  and the thickness T 2  of the base portion  36  in the first embodiment (see  FIG. 13 ). Thus, a slope angle θ 4  of each sloped surface  38 -D of the raised portion  37 -D is smaller than the slope angles θ 1  and θ 2  of the sloped surface  38  in the first embodiment. At this time, the slope angle θ 4  of the sloped surface  38 -D may be the same as the slope angle θ 3  (see  FIG. 15 ) of the sloped surface  44  of the bottom section of the lamp gripping portion  28  in the first embodiment, which can provide more uniform reflection efficiency of the surface of the lamp clip  18 -D. 
     Sixth Embodiment 
     A sixth embodiment of the present invention will be described with reference to  FIG. 30 . In the sixth embodiment, a sectional shape of a main body  27 -E is changed. In the sixth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -E added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -E that constitutes a main body  27 -E has a substantially trapezoidal sectional shape as shown in  FIG. 30 . A pair of sloped surfaces  38 -E is formed on opposite side surfaces in a width direction of the raised portion  37 -E, and vertexes of the sloped surfaces  38 -E are connected by a flat surface  55  parallel to an X-axis direction. In the raised portion  37 -E, an angle  05  formed by the flat surface  55  and each of the sloped surfaces  38 -E is larger than the angle (see  FIG. 13 ) formed by the sloped surfaces  38  of the raised portion  37  in the first embodiment. Thus, when the lamp clip  18 -E is molded of resin, a molten resin material easily uniformly flows into a mold, thereby reducing poor molding. 
     Seventh Embodiment 
     A seventh embodiment of the present invention will be described with reference to  FIG. 31 . In the seventh embodiment, a sectional shape of a main body  27 -F is changed. In the seventh embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -F added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -F that constitutes the main body  27 -F has a substantially arcuate sectional shape as shown in  FIG. 31 . An arcuate curved surface  56  is formed over the entire circumferential surface of the raised portion  37 -F. The curved surface  56  bulges outward with respect to lines L 2  connecting a vertex P 1  and respective ends of the raised portion  37 -F (end points of the raised portion  37 -F in a length direction of a cold cathode tube  17 -F) . When a light is reflected by the curved surface  56 , the reflected light is appropriately scattered without traveling in a particular direction. This is suitable for providing uniform reflection efficiency. Also, higher strength can be obtained than a curved surface that bulges inward with respect to the line L 2 . 
     Eighth Embodiment 
     An eighth embodiment of the present invention will be described with reference to  FIG. 32 . In the eighth embodiment, a sectional shape of a bottom section  43 -G of a lamp gripping portion  28 -G is changed. In the eighth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -G added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -G that constitutes the bottom section  43 -G of the lamp gripping portion  28 -G has a substantially trapezoidal sectional shape as shown in  FIG. 32 . A pair of sloped surfaces  44 -G is formed on opposite side surfaces of the raised portion  37 -G of the bottom section  43 -G, and vertexes of the sloped surfaces  44 -G are connected by a flat surface  57  parallel to an X-axis direction. An angle θ 6  formed by the flat surface  57  and each of the sloped surfaces  44 -G in the bottom section  43 -G is larger than the angle (see  FIG. 15 ) formed by the sloped surfaces  44  of the bottom section  43  in the first embodiment. Thus, when the lamp clip  18 -G is molded of resin, a molten resin material easily uniformly flows into a mold, thereby reducing poor molding. 
     Ninth Embodiment 
     A ninth embodiment of the present invention will be described with reference to  FIG. 33 . In the ninth embodiment, a sectional shape of a bottom section  43 -H of a lamp gripping portion  28 -H is changed. In the ninth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -H added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -H that constitutes a bottom section  43 -H has a substantially arcuate sectional shape as shown in  FIG. 33 . An arcuate curved surface  58  is formed over the entire circumferential surface of the raised portion  37 -H of the bottom section  43 -H. The curved surface  58  bulges outward with respect to lines L 3  connecting a vertex P 2  and respective ends of the raised portion  37 -H in the width direction. When a light is reflected by the curved surface  58 , the reflected light is appropriately scattered without traveling in a particular direction. This is suitable for providing uniform reflection efficiency. Also, higher strength can be obtained than a raised portion that bulges inward with respect to the line L 3 . 
     Tenth Embodiment 
     A tenth embodiment of the present invention will be described with reference to  FIG. 34 . In the tenth embodiment, a sectional shape of a bottom section  43 -I of a lamp gripping portion  28 -I is changed. In the tenth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -I added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -I that constitutes the bottom section  43 -I is formed to have a substantially angular sectional shape with opposite side surfaces being recessed in an arcuate shape as shown in  FIG. 34 . On opposite side surfaces of the raised portion  37 -I of the bottom section  43 -I, arcuate curved surfaces  59  that bulge inward with respect to lines L 4  connecting the vertex P 2  and respective ends of the raised portion  37 -I in the width direction are formed. The bottom section  43 -I is tapered toward the vertex P 2  by the curved surfaces  59 . This can ensure a large gap between a cold cathode tube  17 -I and the bottom section  43 -I, thereby further improving light taking efficiency. Also, material costs can be reduced as compared with the curved surfaces  59  that bulges outward with respect to the line L 4 . 
     Eleventh Embodiment 
     An eleventh embodiment of the present invention will be described with reference to  FIG. 35 . In the eleventh embodiment, a sectional shape of a bottom section  43 -J of a lamp gripping portion  28 -J is changed. In the eleventh embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -J added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     A raised portion  37 -J that constitutes a bottom section  43 -J has a triangular sectional shape asymmetrical in a width direction as shown in  FIG. 35 . Thus, a pair of sloped surfaces  44 -J formed on opposite side surfaces of the raised portion  37 -J of the bottom section  43 -J have different slope angles. Thus, between a cold cathode tube  17 -J and the bottom section  43 -J, different amounts of light can be emitted from a vertex P 2  of the bottom section  43 -J to the left and right in  FIG. 35 , which is suitable for a backlight unit that desires such design. Alternatively, this design can be used for adding an intensity distribution correction function to the backlight unit. In this case, the vertex P 2  is in an eccentric position from a middle in a width direction of the bottom section  43 -J. 
     Twelfth Embodiment 
     A twelfth embodiment of the present invention will be described with reference to  FIG. 36  or  37 . In the twelfth embodiment, an arrangement of each lamp gripping portion  28 -K on a lamp clip  18 -K is changed. In the twelfth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -K added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 36 , a plurality of (four) lamp gripping portions  28 -K are arranged in positions spaced apart in a length direction of a main body  27 -K with different pitches (spaces) PT 1  to PT 3  between the lamp gripping portions  28 -K. Specifically, the pitches PT 1  to PT 3  between the adjacent lamp gripping portions  28 -K are smaller in positions closer to an edge portion of the main body  27 -K on a side of a support pin  29 -K, and larger in positions closer to an edge portion on a side opposite the support pin  29 -K. Specifically, distribution density of the lamp gripping portions  28 -K on the lamp clip  18 -K is set to be higher on the side closer the eccentrically placed support pin  29 -K. 
     As shown in  FIG. 37 , a plurality of lamp clips  18 -K having the above-described structure are mounted to a chassis  14 -K, and the lamp clips  18 -K are designed with different pitches PT 1  to PT 3  between the lamp gripping portions  28 -K depending on mounting positions to the chassis  14 -K. Specifically, a maximum value PTmax of a pitch between the lamp gripping portions  28 -K on the lamp clip  18 -K provided close to a reference line L 1 -K of the chassis  14 -K is set to be smaller than a minimum value PTmin of a pitch between the lamp gripping portions  28 -K on the lamp clip  18 -K mounted to a position farther from the reference line L 1 -K than the above-described lamp clip  18 -K. Specifically, distribution density of the lamp gripping portions  28 -K on the chassis  14 -K is set to be higher on the side closer to the reference line L 1 -K. 
     With such design, when each cold cathode tube  17 -K is mounted to each lamp gripping portion  28 -K, the pitches between adjacent cold cathode tubes  17 -K are unequal, distribution density of the cold cathode tubes  17 -K is higher on the side closer to the reference line L 1 -K on the chassis  14 -K, and distribution density of the cold cathode tubes  17 -K is lower on the side closer to the opposite end sides. This can improve intensity on a screen center side of the backlight unit  12 -K, and each support pin  29 -K placed closer to the screen middle can satisfactorily support a diffusing plate. 
     Thirteenth Embodiment 
     A thirteenth embodiment of the present invention will be described with reference to  FIG. 38 . In the thirteenth embodiment, a shape of a main body  27 -L is changed. In the thirteenth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -L added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 38 , the main body  27 -L has a constant width over the entire length. This can simplify a shape of a lamp clip  18 -L and reduce mold production costs or the like. 
     Fourteenth Embodiment 
     A fourteenth embodiment of the present invention will be described with reference to  FIG. 39 . In the fourteenth embodiment, a mounting portion  60  is changed. In the fourteenth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -M added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 39 , the mounting portion  60  includes a base portion  61  protruding from a back surface of a main body  27 -M, and a pair of locking pieces  62  bent from a protruding end of the base portion  61  toward the main body  27 -M to oppose the base portion  61 . The locking piece  62  is elastically deformable so as to be close to the base portion  61 , and a stepped locking surface  62   a  is formed in a distal end thereof. A mounting hole  63  in a chassis  14 -M has substantially the same diameter as a space between the locking surfaces  62   a  of the locking pieces  62 . 
     When a lamp clip  18 -M is pressed in the chassis  14 -M from a front side along a Z-axis direction, each mounting portion  60  is inserted into each mounting hole  63 , and the locking piece  62  is once elastically deformed. Then, when the lamp clip  18 -M is pressed to a normal depth, the mounting portion  60  protrudes on a back side of the chassis  14 -M, the locking piece  62  is restored, and the locking surface  62   a  is locked to a rim of the mounting hole  63  in the chassis  14 -M from the back side. Thus, the lamp clip  18 -M is held in a mounting state to the chassis  14 -M. As such, besides the sliding mounting type lamp clip  18  described in the first embodiment, the insertion mounting type lamp clip  18 -M in this embodiment can satisfactorily reduce luminance unevenness. The mounting portion  60  is provided directly below the support pin  29 -M, thereby improving workability in mounting the lamp clip  18 -M to the chassis  14 -M. 
     Fifteenth Embodiment 
     A fifteenth embodiment of the present invention will be described with reference to  FIG. 40  or  41 . In the fifteenth embodiment, a shape of a lamp gripping portion  28 -N is changed. In the fifteenth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -N added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 40 , a holding protrusion  41 -N that constitutes the lamp gripping portion  28 -N is so-called tapered with a gradually decreasing width (size in an X-axis direction) from outside to inside, that is, toward a cold cathode tube  17 . Specifically, the width of the holding protrusion  41 -N, that is, a size in a length direction of the cold cathode tube  17 -N is largest in an outer end position with a longest distance to a central axis AX of the cold cathode tube  17 -N and smallest in an inner end position with a shortest distance to the central axis AX of the cold cathode tube  17 -N, and gradually decreases toward the central axis AX of the cold cathode tube  17 -N. Specifically, the width of the holding protrusion  41 -N tends to be proportional to the distance to the central axis AX of the cold cathode tube  17 -N in a mounting state. Thus, a pair of tapered surfaces (sloped surfaces)  41   a  having the same slope angle is formed on opposite side surfaces in a width direction of the holding protrusion  41 -N. The holding protrusion  41  covers the cold cathode tube  17  from a front side (light output side) in the lamp gripping portion  28 , and is tapered as viewed from the front side. 
     As shown in  FIG. 41 , an arm portion  39 -N is also tapered matching the shape of the holding protrusion  41 -N, and an extended tapered surface  39   a  continuous with the holding protrusion  41 -N is formed on each of opposite side surfaces in the width direction of the arm portion  39 -N. Therefore, a smooth transition from the holding protrusion  41 -N is provided. The extended tapered surface  39   a  is formed over the entire length of the arm portion  39 -N from a distal end adjacent to the holding protrusion  41 -N to a root portion. The arm portion  39 -N has a gradually decreasing width from the outer end position to the inner end position over the entire length. Thus, the extended tapered surface  39   a  is formed in a portion on the front side of the center of the cold cathode tube  17 -N in the arm portion  39 -N. A guide portion is tapered similarly to the holding protrusion  41 -N and the arm portion  39 -N. When the lamp gripping portion  28 -N is generally viewed, an inner edge portion of the holding protrusion  41 -N closest to the central axis AX of the cold cathode tube  17 -N is formed to be narrowest. 
     With the cold cathode tube  17 -N being mounted, as shown in  FIG. 40 , the holding protrusion  41 -N of the lamp gripping portion  28 -N covers the front side (light output side) of the cold cathode tube  17 -N and forms a shadow, in other words, the holding protrusion  41 -N is interposed between the cold cathode tube  17 -N and the diffusing plate. The holding protrusion  41 -N is tapered as described above, and a covering area of the cold cathode tube  17 -N from the front side is smaller than a case where the holding protrusion has a constant width. This means that an effective light emitting area in the cold cathode tube  17 -N increases, which increases an amount of light taken from the cold cathode tube  17 -N. Also, besides the holding protrusion  41 -N, the arm portion  39 -N and the guide portion are tapered over the entire length, and thus a covering area of the cold cathode tube  17  by the arm portion  39 -N, the holding protrusion  41 -N, and the guide portion surrounding the outer peripheral surface of the cold cathode tube  17 -N is circumferentially minimized, which is further effective for increasing the amount of light. A lamp gripping portion simply formed to be narrow may provide insufficient strength, but in this embodiment, the outer edge portion of the lamp gripping portion  28 -N ensures an original width, thereby ensuring sufficient strength. 
     Next, an operation when each cold cathode tube  17 -N is lit will be described. As shown in  FIG. 40 , the holding protrusions  41 -N of the lamp gripping portion  28 -N that covers the cold cathode tube  17 -N from the front side (light output side) are tapered toward the inner ends, and thus a covering area of the cold cathode tube  17 -N by the holding protrusion  41 -N as viewed from the front side is smaller than a case where the holding protrusion has a constant width. This can increase an effective light emitting area of the cold cathode tube  17 -N and ensure a sufficient amount of light taken from the cold cathode tube  17 -N. Therefore, the holding protrusion  41 -N that covers the cold cathode tube  17 -N from the front side is less likely to be recognized as a dark portion. The holding protrusion  41 -N (lamp gripping portion  28 -N) has a symmetrical shape, and the tapered surfaces  41   a  have the same slope angle, which is further effective for reducing luminance unevenness. Further, as shown in  FIG. 41 , the extended tapered surface  39   a  is formed so that the holding protrusion  41 -N and also the arm portion  39 -N and the guide portion are tapered over the entire lengths, and thus a covering area of the cold cathode tube  17 -N by the arm portion  39 -N, the holding protrusion  41 -N, and the guide portion surrounding the outer peripheral surface of the cold cathode tube  17 -N is circumferentially minimized, which is further effective for increasing the amount of light. 
     Sixteenth Embodiment 
     A sixteenth embodiment of the present invention will be described with reference to  FIG. 42  or  43 . In the fifteenth embodiment, a shape of a lamp gripping portion  28 -O is changed. In the fifteenth embodiment, the same components as in the first embodiment are denoted by the same reference numerals with a suffix -O added to the ends, and overlapping descriptions on structures, operations, and advantages will be omitted. 
     As shown in  FIG. 42 , a holding protrusion  41 -O of the lamp gripping portion  28 -O has an inner surface formed with a curved surface  64 , and is thus tapered toward a cold cathode tube  17 -O. Specifically, the holding protrusion  41 -O has a width gradually decreasing from an outer end side toward an inner end side, that is, toward a central axis AX of the cold cathode tube  17 -O. An arm portion  39 -O is also tapered continuously with the holding protrusion  41 -O. This can reduce a covering area of the cold cathode tube  17 -O by the lamp gripping portion  28 -O, and ensure a sufficient amount of light taken from the cold cathode tube  17 -O. 
     As a further variation aspect, as shown in  FIG. 43 , a holding protrusion  41 -O′ may have a substantially triangular sectional shape, and tapered surfaces  41   a -O′ may be directly connected. An angle formed by the tapered surfaces  41   a -O′ is preferably an acute angle. This can further reduce a covering area of a cold cathode tube  17 -O′ by a lamp gripping portion  28 -O′, which is further suitable for increasing an amount of light. 
     Further Embodiments 
     The present invention is not limited to the embodiments described in the above descriptions and the drawings, and for example, the following embodiments also fall within a technical scope of the present invention. 
     (1) Besides the above-described embodiments, the number, shape, arrangement of lamp gripping portions on a lamp clip may be appropriately changed. Specifically, it may be allowed that a shape of an inner surface of a lamp gripping portion  28 ′ is changed, and as shown in  FIGS. 44 and 45 , auxiliary sloped surfaces  65  sloping upward toward an arm portion  39 ′ are provided in opposite side end positions of sloped surfaces  44 ′ of an inner surface of the lamp gripping portion  28 ′. The number of lamp gripping portions may be three or less or five or more. A pair of arm portions that constitute the lamp gripping portion may be asymmetrical to each other. The lamp gripping portion may include one arm portion, and a cold cathode tube may be laterally mounted along a plate surface of a main body. The lamp gripping portion may be placed in a position at a predetermined height raised from the main body. 
     (2) In the fifteenth and sixteenth embodiments, the entire lamp gripping portion is tapered to form the tapered surface and the extended tapered surface, but the extended tapered surface may be omitted except a tapered surface formed on a holding protrusion, that is, only the holding protrusion may be tapered in the present invention. Further, for example, the tapered surface and the extended tapered surface may be left at the center of the cold cathode tube in the lamp gripping portion, specifically, in a region on a front side of a reference surface parallel to the chassis passing through the center of the cold cathode tube, but the extended tapered surface may be omitted in a region on a back side. This can ensure at least a sufficient amount of light emitted from the cold cathode tube to the front side. Therefore, a dark portion is less likely to be recognized. 
     (3) In the first embodiment, the sloped surface (relief surface) and the extended sloped surface (extended relief surface) are formed over the entire inner and outer surfaces of the lamp gripping portion, but the extended sloped surface may be omitted except an sloped surface formed on a bottom section in the present invention. Further, a forming range of the extended sloped surface in the lamp gripping portion may be appropriately changed. 
     (4) Besides the above-described embodiments, the number, shape, arrangement of support pins on a lamp clip may be appropriately changed. Specifically, a plurality of support pins may be provided. The support pin may be formed into a pyramidal shape. The support pin may be provided in an eccentric position in a width direction of a main body. The support pin may be provided in a middle position in a length direction of the main body. 
     (5) Besides the above-described embodiments, the number, shape, arrangement of mounting portions on a lamp clip may be appropriately changed. Specifically, placement of a second mounting portion  31 ′ may be changed so that, as shown in  FIGS. 44 and 45 , a base portion  49 ′ of the second mounting portion  31 ′ is connected to a position directly on a back side of a support pin  29 ′ of a main body  27 ′. Only one, or three or more mounting portions may be provided. It may be allowed that the first mounting portion does not protrude laterally from an edge portion of the main body. With the change of the mounting portion, the number, shape, arrangement of mounting holes in a chassis and insertion holes in a reflection sheet may be appropriately changed. 
     (6) Also, for example, a piece that constitutes each mounting portion may be extended along the width direction of the main body, and the main body may be slid along the width direction and thus attached to and detached from the chassis. 
     (7) Besides the above-described embodiments, the shape of the main body on the lamp clip may be appropriately changed. Specifically, the main body may be formed into a square shape on the plan view, a circular or an oval shape, or a polygonal shape other than a rectangular shape on the plan view in the present invention. Further, the main body may be mounted to the chassis with a length direction being in parallel with a reference line (length direction of a cold cathode tube). In this case, a plurality of lamp gripping portions may grip one cold cathode tube. 
     (8) In the first embodiment, the raised portion has the pair of sloped surfaces along the width direction, but a pair of sloped surfaces along the length direction may be added on opposite edge portions in the length direction of the main body in the present invention. The sectional shape of the raised portion may be appropriately changed besides the shapes in the first, sixth and seventh embodiments. At this time, the raised portion may have an asymmetrical sectional shape. The raised portion together with the sloped surfaces may be omitted. The base portion or the raised portion may be omitted from the main body. 
     (9) Besides the above-described embodiments, the number and arrangement of lamp clips provided on the chassis may be appropriately changed. Specifically, as shown in  FIG. 46 , two lamp clips  18 ″ may be arranged along a long side direction of a chassis  14 ″ in a position adjacent to a reference line. At this time, a support part  66  including a configuration without a lamp gripping portion  28 ″ from a lamp clip  18 ″ and having only a support pin  29 ″ may be provided separately from the lamp clip  18 ″. Further, the number of provided lamp clips or spaces between the lamp clips in the long side direction of the chassis may be changed, and also those in the short side direction of the chassis may be changed. 
     (10) In the above-described embodiments, the reference line is set in parallel with the length direction of the cold cathode tube, but the reference line may be set perpendicularly to the length direction of the cold cathode tube in the present invention. 
     (11) In the above-described embodiments, the cold cathode tube is used as a light source, but for example, a different type of light source such as a hot cathode tube may be used in the present invention. 
     (12) In the above-described embodiments, the chassis is formed of sheet metal, but may be molded of resin. 
     (13) In the above-described embodiments, the TFT is used as the switching element of the liquid crystal display device, but the present invention may be applied to a liquid crystal display device using a switching element other than the TFT (for example, thin film diode (TFD)), and may be applied to a liquid crystal display device for a monochrome display other than a liquid crystal display device for a color display. 
     (14) In the above-described embodiments, the liquid crystal display device using a liquid crystal panel as a display panel is exemplified, but the present invention may be applied to a display device using a different type of display panels. 
     (15) In the above-described embodiments, the television receiver apparatus including the tuner is exemplified, but the present invention may be applied to a display device without a tuner. 
     (16) In the first, eighth, tenth and eleventh embodiments, the pair of sloped surfaces or curved surfaces with a vertex in the middle position in the width direction are formed on the bottom section of the lamp gripping portion, but for example, one sloped surface or curved surface with a vertex set at one edge portion of opposite edge portions in the width direction of the lamp gripping portion and sloping downward from the vertex toward the other edge portion may be formed in the present invention. 
     (17) In the first and fourth embodiments, the first mounting portion and the second mounting portion have different widths and lengths, and correspondingly thereto, the first mounting hole and the second mounting hole have different widths and lengths, but for example, the first mounting portion and the second mounting portion, and the first mounting hole and the second mounting hole may have the same length and different widths, or the same width and different lengths in the present invention. Also in this case, sizes of the mounting portions and the mounting holes are different in a direction perpendicular to an inserting direction of the first mounting portion and the second mounting portion into the first mounting hole and the second mounting hole, and a larger mounting portion is larger than a smaller mounting hole and cannot be inserted thereinto. Therefore, the lamp clip is less likely to be mounted in a wrong mounting direction. 
     (18) In the first and fourth embodiments, the pieces of the mounting portions have different widths and lengths, but it may be allowed that the pieces have the same width and length, at least one of widths (sizes in the X-axis direction in the drawings) or thicknesses (sizes in the Y-axis direction in the drawings) of the base portions are different, and the sizes of the mounting holes are different corresponding thereto in the present invention. In short, it is sufficient that the sizes in the direction perpendicular to the inserting direction of the mounting portions into the mounting holes are different. 
     (19) As a further variation aspect of the fourth embodiment, a control portion partially protruding in a length direction may be provided in at least one of the mounting portions, and a notch that allows insertion of the control portion may be provided in a mounting hole corresponding to the mounting portion having the control portion among the mounting holes. 
     (20) In the above-described embodiments, the case where the mounting portion is provided in the lamp clip, the mounting hole is provided in the chassis, and the insertion hole is provided in the reflection sheet is described as a mounting structure of the lamp clip, but the mounting portion, the mounting hole, and the insertion hole may be removed and the lamp clip may be directly or indirectly mounted to the chassis by a different mounting structure. The different mounting structure includes, for example, a structure in which a double-sided tape is interposed between the main body and the chassis or the reflection sheet. 
     (21) In the above-described embodiments, the raised portion that constitutes the main body has the angular shape with the pair of sloped surfaces or curved surfaces, but for example, a plurality of angular portions may be arranged on the front side of the base portion to form a raised portion having three or more sloped surfaces or curved surfaces in the present invention. The raised portion may have a shape other than an angular shape in the present invention.