Abstract:
A liquid crystal display module is provided including a liquid crystal panel for displaying an image; a backlight unit including a light source unit for providing light to the liquid crystal panel; and a packaging chassis which holds the liquid crystal panel and the backlight unit in a single module. The light source unit includes a plurality of light sources; a light source support board for supporting the light sources; a wavelength conversion member, disposed in front of the light sources, which converts wavelengths of light emitted from the light sources; and a fixing member which holds the wavelength conversion member in front of the light sources.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority under 35 U.S.C. §119 (a) from Korean Patent Application No. 2012-0062801 filed on Jun. 12, 2012 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. 
       BACKGROUND 
       [0002]    1. Field 
         [0003]    Apparatuses consistent with exemplary embodiments relate to a liquid crystal display module and a liquid crystal display apparatus having the same, and more particularly, to a liquid crystal display module including a fixing member for mounting a wavelength conversion member, and a liquid crystal display apparatus having the same. 
         [0004]    2. Description of the Related Art 
         [0005]    A Flat Panel Display (FPD) is an image display device which is thin and light. Recently, liquid crystal displays have been the dominant FPDs on the market. 
         [0006]    There have been various attempts to enhance the image quality of liquid crystal display devices. According to one such attempt, a wavelength conversion member, which increases color expression, is mounted to the device. 
         [0007]    However, a method is needed for stably mounting the wavelength conversion member and solving a problem caused by the heat of the wavelength conversion member. 
       SUMMARY 
       [0008]    One or more of the above-mentioned and other problems and disadvantages occurring in the conventional arrangement may be addressed by one or more exemplary embodiments. One or more exemplary embodiments may provide a liquid crystal display module for enhancing image quality displayed in a display apparatus, and a liquid crystal display apparatus having the same. 
         [0009]    According to an aspect of an exemplary embodiment, a liquid crystal display module includes a liquid crystal panel for displaying an image; a backlight unit comprising at least one light source unit for providing light to the liquid crystal panel; and, a packaging chassis for packaging the liquid crystal panel and the backlight unit into a single module. The light source unit includes a plurality of light sources; a light source support board for supporting the light sources; a wavelength conversion member, disposed in front of the light sources, which converts wavelengths of light emitted from the light sources; and a fixing member for fixing the wavelength conversion member in front of the light sources. 
         [0010]    The fixing member may define a mounting space within which the wavelength conversion member is mounted and an accommodation space within which the light sources are accommodated. 
         [0011]    The light source support board may have a rectangular shape, the light sources may be arranged in a longitudinal direction of the light source support board, and the wavelength conversion member may extend in the longitudinal direction of the light source support board. 
         [0012]    A plurality of front openings may be formed in front of the mounting space in the fixing member and a plurality of rear openings may be formed behind the mounting space in the fixing member, so that light emitted from the light sources can pass through the front openings and light emitted from the wavelength conversion member can pass through the rear openings, and the front openings and the rear openings may face each other. 
         [0013]    The fixing member may include a first vertical part and a second vertical part; a third vertical part interposed between the first vertical part and the second vertical part; a first horizontal part connecting an upper end of the first vertical part and an upper end of the second vertical part; and a second horizontal part connecting a lower end of the first vertical part and a lower end of the third vertical part. 
         [0014]    The mounting space may be bounded by the first vertical part, the third vertical part, the first horizontal part, and the second horizontal part, and the accommodation space may be bounded by the second vertical part, the third vertical part, and the first horizontal part. 
         [0015]    The first vertical part may be adjacent to a front side of the wavelength conversion member, the second vertical part may be disposed behind the light sources and a lower end of the second vertical part may be supported by the light source support board, the third vertical part may be adjacent to a rear side of the wavelength conversion member, the first horizontal part may be disposed over upper ends of the light sources and the top side of the wavelength conversion member, the second horizontal part may support a bottom side of the wavelength conversion member and be supported by the light source support board, and the front openings and the rear openings may be formed in the first vertical part and the third vertical part respectively. 
         [0016]    Ends of the wavelength conversion member may be supported by the packaging chassis. 
         [0017]    The liquid crystal display module may further include a middle chassis for assisting the packaging chassis. The upper side of the first horizontal part may be in contact with the middle chassis. 
         [0018]    The liquid crystal display module may further include a heat sink interposed between the packaging chassis and the light source support board. 
         [0019]    The fixing member may further include a plurality of board contact plates extending outwards from a lower part of the first vertical part and contacting the light source support board. 
         [0020]    The light source unit may further include a thermal conductive pad extending in the longitudinal direction of the light source support board and interposed between the second horizontal part and the light source support board. 
         [0021]    The fixing member may include a first vertical part adjacent to a front side of the wavelength conversion member and comprising the plurality of front openings; a second vertical part disposed behind the light sources, wherein a lower end of the second vertical part is supported by the light source support board; a first horizontal part connecting to an upper end of the first vertical part and an upper end of the second vertical part; and a second horizontal part connected a lower end of the first vertical part and supported by the light source support board. The first vertical part and the second vertical part may each include a projection, wherein the projections face each other and divide the mounting space from the accommodation space, and wherein the plurality of the rear openings are defined by the projections. 
         [0022]    The fixing member may include a first member comprising the first vertical part and the second horizontal part; and a second member comprising the first horizontal part and the second vertical part. An upper end of the first vertical part comprises an insertion part, and an insertion groove, in which the insertion part is inserted, is formed in the first horizontal part. 
         [0023]    The fixing member may include a support part having a lower end supported by the light source support board and disposed behind the rear side of the light sources; and an elastic part extending from the upper end of the support part and securing the wavelength conversion member by pressing the wavelength conversion member such that a rear side of the wavelength conversion member is held against the front side of the light sources. 
         [0024]    The mounting space and the accommodation space may be a single integral space defined by the fixing member. 
         [0025]    The elastic part may include a first elastic part extending from the support part and comprising a light source support groove which extends downward and contacts upper sides of the light sources; a second elastic part extending from the first elastic part and supporting the front side and the bottom side of the wavelength conversion member; and a third elastic part extending from the second elastic part and contacting the light source support board. 
         [0026]    The second elastic part may comprise a plurality of second elastic parts and the third elastic part may comprise a plurality of the third elastic parts, each connected to one of the plurality of second elastic parts, and each of the second elastic parts and third elastic parts may be spaced apart from a neighboring second elastic part and a neighboring third elastic part, respectively. 
         [0027]    The fixing member may be formed of a metal. 
         [0028]    According to an aspect of another exemplary embodiment, a liquid crystal display apparatus includes the liquid crystal display module as mentioned above. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0029]    These and/or other exemplary aspects and advantages will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings in which: 
           [0030]      FIG. 1  is a simplified cross-sectional view of a liquid crystal display apparatus according to an exemplary embodiment; 
           [0031]      FIG. 2  is a simplified cross-sectional view of a liquid crystal display module of the liquid crystal display apparatus of  FIG. 1 ; 
           [0032]      FIG. 3  is a simplified cross-sectional view of a light source unit and a heat sink of the liquid crystal display module of  FIG. 2 ; 
           [0033]      FIG. 4  is a simplified cross-sectional view of a wavelength conversion member of the light source unit of  FIG. 3 , which is supported by a rear chassis; 
           [0034]      FIG. 5  is a simplified perspective view of a fixing member of the light source unit of  FIG. 3 ; 
           [0035]      FIGS. 6 and 7  are simplified views of the wavelength conversion member of  FIG. 3  mounted; 
           [0036]      FIGS. 8 through 11  are various views of heat radiation of the light source unit of  FIG. 3 ; 
           [0037]      FIG. 12  is a simplified cross-sectional view of a light source unit and a heat sink according to another exemplary embodiment; 
           [0038]      FIG. 13  is a simplified perspective view of a fixing member of the light source unit of  FIG. 12 ; 
           [0039]      FIGS. 14 through 16  are simplified views of the wavelength conversion member of  FIG. 12  mounted; 
           [0040]      FIG. 17  is a simplified cross-sectional view of a light source unit and a heat sink according to yet another exemplary embodiment; 
           [0041]      FIG. 18  is a simplified cross-sectional view of a light source unit and a heat sink according to still another exemplary embodiment; and 
           [0042]      FIG. 19  is a simplified exploded perspective view of a fixing member of the light source unit of  FIG. 18 . 
       
    
    
     DETAILED DESCRIPTION 
       [0043]    Reference will now be made in detail to exemplary embodiments which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. 
         [0044]      FIG. 1  is a simplified cross-sectional view of a liquid crystal display apparatus according to an exemplary embodiments. 
         [0045]    Referring to  FIG. 1 , the liquid crystal display apparatus  1  includes a liquid crystal display module  10  and a housing  20 . 
         [0046]    While the liquid crystal display apparatus  1  can may be any of various display devices such as monitor, notebook, and mobile phone, it is a television in this exemplary embodiment. 
         [0047]    The liquid crystal display module  10  displays an image to the outside, and a liquid crystal panel  140  and a backlight unit  150  are included in the liquid crystal display module  10 , as shown in  FIG. 2 . As shown in  FIG. 1 , the liquid crystal display module  10  also includes a control board  12  for controlling operations of the liquid crystal display module  10 , and a power board  14  for supplying power to the liquid crystal display module  10 . 
         [0048]      FIG. 2  is a simplified cross-sectional view of the liquid crystal display module of the liquid crystal display apparatus of  FIG. 1 . 
         [0049]    Referring to  FIG. 2 , the display module  10  includes a packaging chassis  110 , a middle chassis  130 , a liquid crystal panel  140 , a backlight unit  150 , and a heat sink  190 . 
         [0050]    The packaging chassis  110  packages the liquid crystal panel  140  and the backlight unit  150  as a single module, and includes a first chassis  112  and a second chassis  116 . An opening  114  is formed in the first chassis  112 , and the image from the liquid crystal panel  140  is displayed to the outside through the opening  114 . 
         [0051]    The middle chassis  130  is interposed between the first chassis  112  and the second chassis  116 . The middle chassis  130  assists the packaging of the display module  10 , and supports components of the liquid crystal panel  140 , an optical sheet part  180 , and a light source unit  200 . The light source unit  200  is secured such that a first horizontal part  3410  of a fixing member  300 , to be explained, is supported by a rear side  135  of a protruding portion of the middle chassis  130 . 
         [0052]    The liquid crystal panel  140  displays the image, and liquid crystal (not shown) is disposed therein. The liquid crystal is driven by a voltage applied from a thin film transistor (TFT) array (not shown), and thereby the liquid crystal panel  140  displays the image. The liquid crystal panel  140  further includes a polarizing filter (not shown) and a color filter (not shown). The liquid crystal panel  140  is well known and shall be omitted here. 
         [0053]    The backlight unit  150  provides light so that the liquid crystal panel  140  can display the image. The backlight unit  150  includes the light source unit  200 , a light guide plate  160 , a reflection sheet  170 , and the optical sheet part  180 . 
         [0054]    The light source unit  200  supplies the light to the liquid crystal panel  140 , and includes a light source  210 , a light source support board  230 , a wavelength conversion member  250 , and the fixing member  300 . The components of the light source unit  200  will be explained in detail by referring to the drawings. The light source unit  200  can be disposed on either side (as an edge type light source unit) or on a bottom/rear side (as a direct type light source unit) of the display module  10 . In this embodiment, the light source unit  200  is an edge type light source unit disposed at one side of the display module  10 . 
         [0055]    The light guide plate  160  redirects the light emitted from the light source unit  200 , and together with the light source unit  200 , acts as a surface light source unit and projects light toward the liquid crystal panel  140 . The light guide plate  160  is well known and thus is not further explained. 
         [0056]    The reflection sheet  170  redirects light emitted from a rear surface of the light guide plate  160 , opposite the liquid crystal panel  140 , and reflects the light back toward the light guide plate  160 . Since the reflection sheet  170  is well known, its further explanation shall be omitted. 
         [0057]    The optical sheet part  180  may include one or more of a diffusion sheet, a prism sheet, and so on, and uniformly diffuses the light and enhances brightness. Since the optical sheet part  180  is well known, its further explanation shall be omitted. 
         [0058]    The heat sink  190  for radiating the heat of the light source unit  200  is interposed between the light source unit  200  and the rear chassis  116 . The heat sink  190  absorbs the heat radiated from the light source unit  200  and transfers the absorbed heat to the rear chassis  116 . The heat sink  190  is formed of a metal material of good heat conductivity, such as aluminum or stainless steel. Since the heat sink  190  is well known, its further explanation shall be omitted. 
         [0059]      FIG. 3  is a simplified cross-sectional view of the light source unit and the heat sink of the liquid crystal display module of  FIG. 2 . 
         [0060]    Referring to  FIG. 3 , the light source unit  200  includes the light source  210 , the light source support board  230 , the wavelength conversion member  250 , and the fixing member  300  as described in  FIG. 1 . 
         [0061]    The light source  210  emits light. A plurality of the light sources  210  may be spaced a certain distance apart along a longitudinal direction of the light source support board  230  as shown in  FIG. 8 . The light source  210  includes a light emitting diode. The light emitting diode features a high luminous efficiency and low power consumption, and is increasingly used as a main light source of a liquid crystal display apparatus. Since the light source  210  is well known, its further explanation shall be omitted. 
         [0062]    The light source  210  is mounted on the light source support board  230 , and the light source support board  230  supports the mounted light source  210 . More specifically, when the light source support board  230  is in the form of a rectangular plate as shown in  FIG. 8 , a plurality of the light sources  210  is mounted and supported on it. The light source support board  230  is electrically connected to the control board  12  and the power board  14 , and controls the light source  210  and supplies the power to the light source  210  so that the light source  210  can emit the light. 
         [0063]    The wavelength conversion member  250  is also mounted above an upper side of the light source support board  230 , and is disposed between the light source  210  and the light guide plate  160 , such that it is disposed in front of the light sources  210 . The wavelength conversion member  250  extends along the longitudinal direction of the light source support board  230  to be positioned in front of the light sources  210  as shown in  FIG. 8 . The wavelength conversion member  250  is formed in the shape of a rectangular bar with curved upper and lower parts (rounded corners), but is not limited to this shape. The wavelength conversion member  250  may be in any other shape which may be used for easily converting the wavelength of the light from the light source  210 . 
         [0064]    The wavelength conversion member  250  can be formed of glass or plastic, and has therein a fluorescent material for converting the wavelength of the light emitted from the light sources  210 . In addition to the fluorescent material, the wavelength conversion member can have other material therein. 
         [0065]    The fixing member  300  for fixing the wavelength conversion member  250  in front of the light sources  210  is mounted on the light source support board  230 . The fixing member  300  includes a mounting space S 1 , within which the wavelength conversion member  250  may be mounted, and an accommodation space  52 , within which the light sources  210  may be accommodated. 
         [0066]    The fixing member  300  includes a first vertical part  310 , a second vertical part  320 , a third vertical part  330 , a first horizontal part  340 , and a second horizontal part  350 , which are explained in detail by referring to  FIG. 5 . 
         [0067]      FIG. 4  is a simplified cross-sectional view of the wavelength conversion member of the light source unit of  FIG. 3 , which is supported by the rear chassis. 
         [0068]    In the light source unit  200 , as shown in  FIG. 4 , either end of the wavelength conversion member  250  is supported by the rear chassis  116 . In the light source unit  200 , the first horizontal part  340  of the fixing member  300  is supported by a rear bottom side  135  of a protruding portion of the middle chassis  130 , and the heat sink  190  contacting the bottom side of the light source support board  230  is supported by the rear chassis  116  as shown in  FIG. 2 . Hence, the wavelength conversion member  250  and the fixing member  300  of the light source unit  200  can be securely fixed in the apparatus. 
         [0069]      FIG. 5  is a simplified perspective view of the fixing member of the light source unit of  FIG. 3 . 
         [0070]    Referring to  FIG. 5 , the fixing member  300  includes the first vertical part  310 , the second vertical part  320 , the third vertical part  330 , the first horizontal part  340 , and the second horizontal part  350  as described with respect to  FIG. 3 . 
         [0071]    The first vertical part  310  is adjacent to a light output, front side of the wavelength conversion member  250 , and an upper end of the first vertical part is connected to the first horizontal part  340 . The first vertical part  310 , the third vertical part  330 , the first horizontal part  340 , and the second horizontal part  350 , together define the mounting space S 1  within which the wavelength conversion member  250  can be mounted. 
         [0072]    A plurality of front openings  315  are formed in the first vertical part  310 . The front openings  315  are formed adjacent to and corresponding to the light emission, front side of the wavelength conversion member  250 , and a number of the front openings corresponds to a number of the light sources  210 . The front openings  315  are shown as having rectangular shapes, but they are not limited thereto. The front openings  315  can be formed in other shapes for adequately passing the light emitted from the light source  210  and transmitted through the wavelength conversion member  250 . A length of the front opening  315  (i.e. a length in the longitudinal direction) may be similar to a length of the light source  210  in the longitudinal direction, so as to pass as much as possible of the light emitted from the light sources  210  and transmitted through the wavelength conversion member  250 . The light emitted from the light source  210  passes through the wavelength conversion member  250 , and is emitted to the outside of the light source unit  200  through the front opening  315   s , and then is incident on the light guide plate  160 . 
         [0073]    An upper end of the second vertical part  320  is connected to the first horizontal part  340 , and a lower end of the second vertical part  320  is supported by the light source support board  230 . The second vertical part  320  is disposed adjacent to a rear side of the light sources  210 . The second vertical part  320 , the first horizontal part  340 , and the third vertical part  330 , together form the accommodation space S 2  within which the light sources  210  may be accommodated. 
         [0074]    The third vertical part  330  supports the rear side of the wavelength conversion member  250 , is interposed between the first vertical part  310  and the second vertical part  320  and between the light sources  210  and the wavelength conversion member  250 , and is adjacent to the front side of the light sources  210 . The third vertical part  330  spatially separates the mounting space S 1  and the accommodation space S 2 . 
         [0075]    Rear openings  335  are formed in the third vertical part  330  at locations corresponding to the front openings  315 . The rear openings  335  have rectangular shapes, like the front openings  315 , but are not limited thereto. The rear openings  335  can be formed in other shapes for adequately passing the light emitted from the light sources  210 . Similar to the front openings  315 , a number of the rear openings  335  corresponds to the number of light sources  210 , and are in positions corresponding to the positions of the front openings  315 . The light emitted by the light sources  210  is transmitted to the wavelength conversion member  250  via the rear openings  335 . 
         [0076]    The first horizontal part  340  covers the top part of the light sources  210  and supports the top side of the wavelength conversion member  250 . The second horizontal part  350  supports the bottom side of the wavelength conversion member  250 , and the bottom side is supported by the top side of the light source support board  230 . 
         [0077]    The first through third vertical parts  310 ,  320  and  330  and the first and second horizontal parts  340  and  350  are formed through a bending process. That is, the fixing member  300  is fabricated by bending one member multiple times. The front openings  315  and the rear openings  335  are fabricated using cutting or punching. 
         [0078]      FIGS. 6 and 7  are simplified views of the wavelength conversion member of  FIG. 3 , as it is mounted. 
         [0079]    Referring to  FIG. 6 , the wavelength conversion member  250  is mounted by sliding it from one side along an arrow S, as shown in  FIG. 6 , into the mounting space S 1  which is formed by the first vertical part  310 , the third vertical part  330 , the first horizontal part  340 , and the second horizontal part  350  of the fixing member  300 . 
         [0080]    Referring to  FIG. 7 , once the wavelength conversion member  250  is mounted in the fixing member  300 , the fixing member  300  moved onto the light source support board  230  along an arrow P so that the plurality of light sources  210  are received within the accommodation space S 2  which is formed by the second vertical part  320  and the first horizontal part  340 . 
         [0081]    When the fixing member  300  is mounted onto the light source support board  230 , the wavelength conversion member  250  and the fixing member  300  are supported and securely fixed to the rear chassis  116  and the middle chassis  130  as discussed with respect to  FIG. 3 . In this embodiment, the wavelength conversion member  250  can be securely mounted to the light source unit  200  using the fixing member  300  without a separate fastening component such as screw or tape. 
         [0082]      FIGS. 8 through 11  depict various embodiments for heat radiation from the light source unit. 
         [0083]    Like the light sources  210 , the wavelength conversion member  250  radiates heat which results from the heat absorbed from the light sources  210  and the heat radiated by the wavelength conversion. The fixing member  300  is formed of a metal having a good heat conductivity so as to absorb the heat radiated by the wavelength conversion member  250  and to transfer the absorbed heat to the heat sink  190 . That is, the fixing member  300  can be formed of a metal such as aluminum or stainless steel, similar to that of the heat sink  190 . 
         [0084]    Referring to  FIG. 8  the heat R radiated from the wavelength conversion member  250  is guided between the front openings  315  of the first vertical part  310 . That is, since the plurality of the front openings  315 , rather than the single front opening  315 , is formed, the first vertical part  310  can absorb the heat radiated from the wavelength conversion member  250  between the front openings  315 . This also applies to the third vertical part  330 , which is not depicted in the drawing. The heat radiated from the wavelength conversion member  250  is also transferred to and absorbed by the other components of the fixing member  300 , that is, the first horizontal part  340 , the second horizontal part  350 , and the second vertical part  320 . Since either end of the wavelength conversion member  250  is supported by the rear chassis  116 , as shown in  FIG. 3 , the heat may also be transferred directly to the rear chassis  116 . 
         [0085]    The fixing member  300  absorbs the heat radiated from the wavelength conversion member  250  and transfers the heat to the heat sink  190 , and the heat sink  190  transfers the heat to the rear chassis  116 , shown in  FIG. 2 . The fixing member  300  also absorbs the heat radiated from the light source  210  and transfers it to the heat sink  190 . As a result, the fixing member  300  can radiate heat not only from the wavelength conversion member  250  but also from the light sources  210 , can thereby assist the heat sink  190 . 
         [0086]    Referring to  FIGS. 9 and 10 , a light source unit  200 ′ may further include a thermal conductive pad  400  in addition to the components of the aforementioned light source unit  200 . 
         [0087]    The thermal conductive pad  400  extends in the longitudinal direction of the light source support board  230  and lies between the light source support board  230  and the second horizontal part  350  of the fixing member  300 . The thermal conductive pad  400  absorbs the heat h from the second horizontal part  350  and transfers the absorbed heat h to the heat sink  190 . 
         [0088]    The thermal conductive pad  400  is in a rectangular shape, but is not limited thereto. In some cases, the thermal conductive pad  400  may be formed of a film. The thermal conductive pad  400  can be formed of graphite having a good thermal conductivity, or another material having a good thermal conductivity. 
         [0089]    Since the thermal conductive pad  400  assists in absorbing and transferring the heat of the lower part of the fixing member  300 , the heat radiation efficiency of the wavelength conversion member  250  can be further increased thereby. 
         [0090]    Referring to  FIG. 11 , a light source unit  200 ′ includes a fixing member  300 ′ which further includes a board contact plate  380  in addition to the components of the light source unit  200 . 
         [0091]    A plurality of board contact plates  380  are formed by extending outwards portions of the fixing member  300 ′ (in a width direction of the light source support board  230 ) from the lower parts of the front openings  315  of the first vertical part  310 . That is, a number of the board contact plates  380  corresponds to a number of the front openings  315 . 
         [0092]    The board contact plates  380  are formed together with the front openings  315  when the front openings  315  are formed in the first vertical part  310 ′. To fabricate one board contact plate  380 , three cuts C 1  through C 3  are made to form the front opening  315  in the first vertical part  310 . A part of the first vertical part  310  inside the three cuts C 1  through C 3  is bent downwards from the first vertical part  310 . Thus, the portions bent downwards form the single board contact plates  380 . 
         [0093]    The board contact plate  380  has a rectangular shape, and contacts the top side of the light source support board  230 . Similar to the second horizontal part  350 , the board contact plate  380  absorbs the heat h radiated from the wavelength conversion member  250  and transfers the absorbed heat to the heat sink  190 . 
         [0094]    Since the fixing member  300 ′ can extend the contact surface area of the light source support board  230  by adding the board contact plate  380  to the lower end of the second vertical part  320  and the second horizontal part  350 , the heat h radiated from the wavelength conversion member  250  can be more effectively transferred to the heat sink  190 . 
         [0095]      FIG. 12  is a simplified cross-sectional view of a light source unit and a heat sink according to another exemplary embodiment, and  FIG. 13  is a simplified perspective view of a fixing member of the light source unit of  FIG. 12 . 
         [0096]    Referring to  FIG. 12 , the light source unit  200 A further includes a fixing member  500  in addition to the light source unit  210 , the light source support board  230 , and the wavelength conversion member  250 , as described above. 
         [0097]    In the present embodiment, unlike in the previously-described exemplary embodiment, the mounting space for mounting the wavelength conversion member  250  and the accommodation space for accommodating the light sources  210  are integrated into a single space S in the fixing member  500 . The fixing member  500  is formed of a metal having a good elasticity, and elastically secures the wavelength conversion member  250 . 
         [0098]    Referring to  FIG. 13 , the fixing member  500  includes a support part  520  and an elastic part  560 . 
         [0099]    The support part  520  supports the rear sides of the light sources  210 , and a lower end  520   a  of the support part  520  is supported by the top side of the light source support board  230 . The lower end  520   a  of the support part  520  is bent to be parallel with the light source support board  230  and thus contacts the light source support board  230 . 
         [0100]    The elastic part  560  includes a first elastic part  562 , a second elastic part  564 , and a third elastic part  566 . 
         [0101]    The elastic part  560  extends from the support part  520  and brings the rear side of the wavelength conversion member  250  into contact with the front side of the light sources  210  to secure the wavelength conversion member  250  inside the fixing member  500 . 
         [0102]    The first elastic part  562  extends from the upper end  520   b  of the support part  520  and is adjacent to the top side of the wavelength conversion member  250 . A light source support groove  562   a  is formed in the first elastic part and is bent toward the light source support board  230  and extends in the longitudinal direction of the light source support board  230 . The light source support groove  562   a  contacts the top side of the light sources  210 . 
         [0103]    The second elastic part  564  extends downward from the first elastic part  562  and supports the front side and the bottom side of the wavelength conversion member  250 . The portion of the second elastic part  564  facing the center of the front of the wavelength conversion member  250  is concave toward the wavelength conversion member  250 , so the second elastic part  564  elastically contacts the center of the front of the wavelength conversion member  250 . 
         [0104]    A plurality of second elastic parts  564  are formed and spaced a certain distance d apart from each other in the longitudinal direction of the first elastic part  562 . The distance d between the second elastic parts  564  is set such that the light passing through the wavelength conversion member  250  properly passes through the fixing member  500 . That is, in this embodiment, the space between the second elastic parts  564  serves as the front opening  315  of the previously-described embodiment. Accordingly, the distance d between the second elastic parts  564  may be approximately the length of one of the light sources  210  (in the longitudinal direction). 
         [0105]    The third elastic part  566  extends from a bottom end of the second elastic part  654 , and extends in parallel with the light source support board  230 . A plurality of the third elastic parts  566  is formed, and a number of the third elastic parts  566  is the same as the number of the second elastic parts  564 . The third elastic part  566  contacts the light source support board  230  and assists the elastic contact between the second elastic part  564  and the wavelength conversion member  250 . The third elastic part  566  increases the contact surface area of between light source support board  230  and the wavelength conversion member  250  to facilitate the heat transfer to the heat sink  190 . 
         [0106]      FIGS. 14 through 16  are simplified views of the wavelength conversion member of  FIG. 12 , as mounted. 
         [0107]    Referring to  FIG. 14 , the wavelength conversion member  250  is inserted upwards into the fixing member  500 , along an arrow T, through the space between the lower end  520   a  of the support part  520  and the third elastic part  566  of the fixing member  500 . 
         [0108]    Referring to  FIG. 15 , once the wavelength conversion member  250  is inserted into the fixing member  500 , the elastic part  560 , in particular, the second elastic part  564  and the third elastic part  566  are pulled outwards, and away from each other, so as to increase a distance between the lower end  520   a  of the support part  520  and the third elastic part  566 . Next, the fixing member  500  is put down in the direction b so as to accommodate the light sources  210  therewithin. 
         [0109]    Referring to  FIG. 16 , once the light sources  210  and the wavelength conversion member  250  are within the fixing member  500 , the elastic part  560  applies a restoring force in a direction e. Hence, the second elastic part  564  contacts the center of the front of the wavelength conversion member  250  and pushes the wavelength conversion member  250  toward the light sources  210 . As a result, the rear side of the wavelength conversion member  250  closely contacts the front side of the light sources  210 , the rear side of the light sources  210  closely contacts the inner side of the support part  520 , and the wavelength conversion member  250  and the light sources  210  are securely fixed in the fixing member  500 . 
         [0110]    In this embodiment, the light sources  210  and the wavelength conversion member  250  are made to contact each other by means of the fixing member  500 . Hence, the efficiency of the incident light to the wavelength conversion member  250  can be increased. 
         [0111]      FIG. 17  is a simplified cross-sectional view of a light source unit and a heat sink according to yet another exemplary embodiment. 
         [0112]    Referring to  FIG. 17 , the light source unit  200 B further includes a fixing member  600  in addition to the light source  210 , the light source support board  230 , and the wavelength conversion member  250 , as described above. 
         [0113]    The fixing member  600  may be integrally formed by injection molding, and includes a first vertical part  610 , a second vertical part  620 , a first horizontal part  630 , and a second horizontal part  640 . 
         [0114]    The first vertical part  610  supports the front side of the wavelength conversion member  250 , and includes a plurality of front openings (not shown) in the front side. The second vertical part  620  is disposed behind the light sources  210  and a lower end of the second vertical part  620  is supported by the light source support board  230 . 
         [0115]    The first horizontal part  630  connects the top end of the first vertical part  610  and the top end of the second vertical part  620 . The first horizontal part  630  covers the upper part of the light sources  210  and supports the top side of the wavelength conversion member  250 . 
         [0116]    The second horizontal part  640  is connected to the lower end of the first vertical part  610  and is supported by the light source support board  230 . The second horizontal part  640  is spaced apart from the second vertical part  620  by a distance corresponding to the thickness of the light source  210 , so as to accommodate the light sources  210  therebetween. 
         [0117]    Projections  632  and  642  extend from the first horizontal part  630  and the second horizontal part  640 , respectively, and face each other, and form a mounting space S 1 ′ and an accommodation space S 2 ′. The projections  632  and  642  are spaced apart to enable the light emitted from the light sources  210  to be transmitted to the wavelength conversion member, thus serving as the rear openings, as described with respect to the previous exemplary embodiment. 
         [0118]      FIG. 18  is a simplified cross-sectional view of a light source unit and a heat sink according to still another exemplary embodiment, and  FIG. 19  is a simplified exploded perspective view of a fixing member of the light source unit of  FIG. 18 . 
         [0119]    Referring to  FIGS. 18 and 19 , the light source unit  200 C further includes a fixing member  700  in addition to the light source  210 , the light source support board  230 , and the wavelength conversion member  250 , as described above. 
         [0120]    The fixing member  700  includes a first member  710  and a second member  720 . 
         [0121]    The first member  710  includes a first vertical part  760  and a second horizontal part  770 . 
         [0122]    The first vertical part  760  is adjacent to and supports the front side of the wavelength conversion member  250 . A plurality of front openings  762  is formed and spaced a certain distance apart from each other in the longitudinal direction of the fixing member  700  in the first vertical part  760 . The first vertical part  760  includes an insertion part  764  in the upper end thereof, to connect to the second member  720 . 
         [0123]    The second horizontal part  770  is substantially similar to the second horizontal part  640  of the exemplary embodiment of  FIG. 17 . The second horizontal part  770  includes a projection  772  as in the second horizontal part  640  of the exemplary embodiment of  FIG. 17 . 
         [0124]    The second member  720  includes a first horizontal part  780  and a second vertical part  790 . 
         [0125]    The first horizontal part  780  covers the top side of the light sources  210  and supports the top side of the wavelength conversion member  250 . The first horizontal part  780  includes a projection  780  at a location facing the projection  772  of the second horizontal part  770 . The projections  772  and  782  separate a mounting space S 1 ″ and an accommodation space S 2 ″ as in the exemplary embodiment of  FIG. 17 , and may serve as the rear opening. 
         [0126]    An insertion groove  784  for inserting the insertion part  764  of the first vertical part  760  is formed in the lower front side of the first horizontal part  780 . The first member  710  and the second member  720  are coupled using the insertion groove  784  of the first horizontal part  780  and the insertion part  764  of the first vertical part  760 . 
         [0127]    The second vertical part  790  is substantially similar to the second vertical part  620  of the exemplary embodiment of  FIG. 17 . The second vertical part  790  is disposed behind the light sources  210  and a lower end of the second vertical part  790  is supported by the light source support board  230 . 
         [0128]    Unlike the previously-described embodiments, the fixing member  700  of this exemplary embodiment includes two members  710  and  720 . Since the first member  710  and the second member  720  are coupled through the insertion, a separate fastening component, such as screw or tape, for fixing the fixing member is not required. Thus, the fixing member  700  of this exemplary embodiment can be mounted in the display apparatus simply and stably. 
         [0129]    Although a few exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the inventive concept, the scope of which is defined by the claims and their equivalents.