Abstract:
A liquid crystal display device containing a liquid crystal panel that includes a first substrate, a second substrate, and first and second polarizers at respective outer surfaces of the first and second substrates; and a backlight unit under the liquid crystal panel that includes a light source, wherein the light source includes a first luminous body having a first peak wavelength, a second luminous body having a second peak wavelength greater than the first peak wavelength, and a third luminous body having a third peak wavelength greater than the second peak wavelength, and wherein the first polarizer contains a light absorption layer having an absorption peak between the second peak wavelength and the third peak wavelength.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    The present application claims priority under U.S.C §119(a) to Korean Patent Application Nos. 10-2015-0122625 filed on Aug. 31, 2015 and 10-2015-0191651 filed on Dec. 31, 2015, each of which is hereby incorporated by reference in its entirety. 
       BACKGROUND 
       [0002]    Field of the Disclosure 
         [0003]    The present disclosure relates to a liquid crystal display device, and more particularly, to a polarizer and a display device including the same that have a light-absorption layer absorbing at a specific wavelength and a wide color gamut. 
         [0004]    Discussion of the Related Art 
         [0005]    A liquid crystal display (LCD) device includes two substrates and a liquid crystal layer between the two substrates and transmits light by controlling an arrangement of liquid crystal molecules of the liquid crystal layer, thereby displaying an image. 
         [0006]    In general, the LCD device includes a plurality of pixels arranged in a matrix form, and each pixel includes a thin film transistor, a pixel electrode and a common electrode. Voltages are applied to the pixel electrode and the common electrode of each pixel, and an electric field is generated between the pixel electrode and the common electrode. The liquid crystal molecules of the liquid crystal layer are rearranged by the generated electric field, and the transmittance of the liquid crystal layer is changed. Therefore, by adjusting the voltages applied to the pixel electrode and the common electrode of the LCD device, the transmittance of the liquid crystal layer of each pixel can be controlled to produce a value corresponding to an image signal. As a result, the LCD device displays an image. 
         [0007]    The LCD device is not self-luminous, and thus additional light should be provided to the LCD device. Accordingly, the LCD device includes a liquid crystal panel displaying the image and a backlight unit providing light to the liquid crystal panel. 
         [0008]    The backlight unit includes a light source. A fluorescent lamp such as a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) has been used for the light source. 
         [0009]    The backlight unit is classified as a direct-type or an edge-type depending on the path of light emitted from the light source. In a direct-type backlight unit, a plurality of lamps is disposed under the liquid crystal panel, and light emitted from the lamp is directly provided to the liquid crystal panel. In an edge-type backlight unit, a light guide plate is disposed under the liquid crystal panel and a lamp is disposed at at least one side of the light guide plate. Then, light emitted from the lamp is refracted and reflected by the light guide plate and is indirectly provided to the liquid crystal panel. 
         [0010]    Recently, the edge-type backlight unit has been widely used in accordance with the request for a thin and light weight LCD device, and a light emitting diode (LED) lamp has replaced the fluorescent lamp because of its advantages in power consumption, weight and brightness. 
         [0011]      FIG. 1  is a schematic cross-sectional view of an LCD device including an edge-type backlight unit according to the related art. 
         [0012]    In  FIG. 1 , the related art LCD device includes a liquid crystal panel  10 , a backlight unit  20 , a main frame  30 , a top frame  40 , and a bottom frame  50 . 
         [0013]    The liquid crystal panel  10  includes a lower substrate  12  and an upper substrate  14 , and a liquid crystal layer (not shown) is disposed between the substrates  12  and  14 . A lower polarizer  18  is disposed under the lower substrate  12 , and an upper polarizer  19  is disposed over the upper substrate  14 . 
         [0014]    A driving unit (not shown) comprising driver integrated circuits (driver ICs) is connected to a side of the liquid crystal panel  10  and provides signals to a plurality of pixels (not shown) in the liquid crystal panel  10 . 
         [0015]    The backlight unit  20  is disposed under the liquid crystal panel  10  and includes a reflective sheet  22 , a light guide plate  24 , and an optical sheet  26  sequentially placed from the bottom. Meanwhile, a light emitting diode (LED) assembly  28  is disposed at a side of the light guide plate  24  as a light source. The LED assembly  28  includes an LED printed circuit board  28   a  and an LED package  28   b.    
         [0016]    The main frame  30  surrounds sides of the liquid crystal panel  10  and the backlight unit  20 . The main frame  30  constitutes a module with the top frame  40  at a front side of the liquid crystal panel  10  and the bottom frame  50  at a rear side of the backlight unit  20 . 
         [0017]    Since the related art LCD device has a relatively low color gamut, the related art LCD device does not express relatively more colors, and it is difficult to display a high-quality image. 
         [0018]      FIG. 2  is a view illustrating the color gamut of a related art LCD device in CIE (International Commission on Illumination) 1976 chromaticity diagram.  FIG. 2  also shows the DCI (digital cinema initiative) color standard. 
         [0019]    Generally, to attain a wide color gamut, an overlap ratio of the color gamut of a display device to the DCI color standard should be more than 95%. However, as shown in  FIG. 2 , the color gamut NCG of the related art LCD device has a smaller area than the DCI color standard, and the overlap ratio is about 81.0%. Therefore, it is difficult that the related art LCD device has a relatively wide color gamut. 
       SUMMARY 
       [0020]    Accordingly, the present invention is directed to a polarizer and an LCD device comprising the same that substantially obviate one or more of the problems due to limitations and disadvantages of the related art. 
         [0021]    An object of the present disclosure is to provide an LCD device that has a wide color gamut. 
         [0022]    Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
         [0023]    To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a liquid crystal display device that comprises a liquid crystal panel that comprises a first substrate, a second substrate, and first and second polarizers at respective outer surfaces of the first and secondsubstrates, and a backlight unit under the liquid crystal panel and comprising a light source, wherein the light source includes a first luminous body having a first peak wavelength, a second luminous body having a second peak wavelength larger than the first peak wavelength, and a third luminous body having a third peak wavelength larger than the second peak wavelength, and wherein the first polarizer includes a light absorption layer having an absorption peak between the second peak wavelength and the third peak wavelength. 
         [0024]    In another aspect, a polarizer includes a polarizing film and a light absorption layer at a surface of the polarizing film and comprising a metal-coordination tetra-azaporphyrin compound of the following chemical formula: 
         [0000]    
       
                 
         
             
             
         
       
     
         [0025]    wherein M is selected from the group consisting of Ni, Mg, Mn, Co, Cu, Ru and V, or M is selected from the group consisting of Mn and Ru to which at least one ligand selected from the group consisting of NH 3 , H 2 O and a halogen atom is coordinated, wherein each of R1, R2, R3, and R4 is independently selected from the group consisting of a C10 to C10 alkyl group and a C6 to C30 aromatic group, wherein each of a, b, c and d is independently 1 or 2, and wherein the light absorption layer further includes a binder, and the metal-coordination tetra-azaporphyrin compound is present in an amount of 0.6 wt % to 1.2 wt % based on the binder. 
         [0026]    It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]    The accompanying drawings, which are included to provide a further understanding of the invention and which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings: 
           [0028]      FIG. 1  is a schematic cross-sectional view of an LCD device including an edge-type backlight unit according to the related art. 
           [0029]      FIG. 2  is a view illustrating a color gamut of a related art LCD device in a CIE 1976 chromaticity diagram. 
           [0030]      FIG. 3  is a schematic perspective view of an LCD device according to an embodiment of the present invention. 
           [0031]      FIG. 4  is a schematic cross-sectional view of an LCD device according to an embodiment of the present invention. 
           [0032]      FIG. 5A  is a perspective view schematically illustrating an LED package according to an embodiment of the present invention.  FIG. 5B  is a cross-sectional view schematically illustrating the LED package according to an embodiment of the present invention. 
           [0033]      FIG. 6A  is a view illustrating an emission spectrum of an LED package of the LCD device according to an embodiment of the present invention.  FIG. 6B  is a view illustrating an absorption spectrum of a light absorption layer of the LCD device according to an embodiment of the present invention.  FIG. 6C  is a view of illustrating a spectrum light passing through the LED package and the light absorption layer of the LCD device according to an embodiment of the present invention. 
           [0034]      FIG. 7  is a view illustrating the color gamut of the LCD device according to an embodiment of the present invention in a CIE 1976 chromaticity diagram. 
           [0035]      FIG. 8  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a first embodiment of the present invention. 
           [0036]      FIG. 9  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a second embodiment of the present invention. 
           [0037]      FIG. 10  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a third embodiment of the present invention. 
           [0038]      FIG. 11  is a cross-sectional view schematically illustrating a second polarizer including a light absorption layer according to a fourth embodiment of the present invention. 
           [0039]      FIG. 12  is a cross-sectional view schematically illustrating a second polarizer including a light absorption layer according to a fifth embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0040]    Reference will now be made in detail to embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. 
         [0041]      FIG. 3  is a schematic perspective view of an LCD device according to an embodiment of the present invention, and  FIG. 4  is a schematic cross-sectional view of an LCD device according to an embodiment of the present invention. 
         [0042]    In  FIG. 3  and  FIG. 4 , the LCD device according to an embodiment of the present invention includes a liquid crystal panel  110 , a backlight unit  120 , a main frame  130 , a top frame  140 , and a bottom frame  150 . 
         [0043]    The liquid crystal panel  110  displays an image and includes a first substrate  112 , a second substrate  114 , a liquid crystal layer (not shown), a first polarizer  118 , and a second polarizer  119 . The second substrate  114  is disposed over the first substrate  112 , and the liquid crystal layer is interposed between the first and second substrates  112  and  114 . The first and second polarizers  118  and  119  are disposed at outer surfaces of the first and second substrates  112  and  114 , respectively. 
         [0044]    Although not shown in the figures, the first substrate  112  includes a plurality of gate lines and a plurality of data lines on its inner surface. The gate lines and the data lines cross each other to define pixel regions. A thin film transistor and a pixel electrode are disposed at each pixel region. The thin film transistor is connected to each of the gate lines and the data lines, and the pixel electrode is connected to the thin film transistor. The first substrate  112  may be referred to as a lower substrate or an array substrate. 
         [0045]    In addition, although not shown in the figures, the second substrate  114  includes a black matrix and a color filter layer on its inner surface. The black matrix has openings corresponding to the pixel regions, and the color filter layer includes red, green and blue color filter patterns respectively corresponding to the openings and sequentially arranged. The second substrate  114  may be referred to as an upper substrate and a color filter substrate. 
         [0046]    A common electrode is formed on the first substrate  112  or the second substrate  114 . The common electrode and the pixel electrode constitute a liquid crystal capacitor with the liquid crystal layer interposed therebetween. For example, the common electrode may be formed in the pixel region of the first substrate  112 . The common electrode and the pixel electrode may be patterned to have a rod shape and may be alternately arranged. 
         [0047]    The first and second polarizers  118  and  119  are attached to the outer surfaces of the first and second substrates  112  and  114 , respectively and selectively transmit specific light. The first and second polarizers  118  and  119  transmit linearly-polarized light parallel to their light-transmission axes, respectively. The light-transmission axis of the first polarizer  118  is perpendicular to the light-transmission axis of the second polarizer  119 . 
         [0048]    The first polarizer  118  or the second polarizer according to an embodiment of the present invention includes a light-absorption layer absorbing light within a wavelength range between red and green, and will be explained in detail later. 
         [0049]    Driver integrated circuits (driver ICs)  116  are attached to at least one side of the liquid crystal panel  110  through connecting means such as tape carrier packages (TCPs), and the driver ICs  116  are connected to a printed circuit board (PCB)  117 . The PCB  117  is bent during a modularization process and is disposed at a side surface of the main frame  130  or at a rear surface of the bottom frame  150 . 
         [0050]    The backlight unit  120  is disposed under the liquid crystal panel  110 , and the backlight unit  120  provides light to the liquid crystal panel  110 . The backlight unit  120  includes a reflection sheet  120 , a light guide plate  124 , an optical sheet  126 , and a light-emitting diode (LED) assembly  128 . 
         [0051]    The LED assembly  128 , as a light source of the backlight unit  120 , includes an LED printed circuit board  128   a  and a plurality of LED packages  128   b . The LED packages  128   b  are mounted on a surface of the LED printed circuit board  128   a  and are disposed with a predetermined distance therebetween along a length of the LED printed circuit board  128   b . As shown, the LED packages  128   b  are arranged in a line. Alternatively, the LED packages  128   b  may be arranged in two or more lines. 
         [0052]    Each of the LED packages  128   b  according to this embodiment of the present invention includes a blue (B) LED chip, a yellow (Y) phosphor, and a red (R) phosphor and emits white light as further described in detail herein. 
         [0053]    The LED assembly  128  is disposed at a side of the light guide plate  124 . The LED assembly  128  may be disposed at a short side of the light guide plate  124 . The light guide plate  124  reflects and refracts light, which is incident on its inside from the LED packages  128   a  through its side surface, and moves the light toward its front surface, thereby implementing a surface light source. The side surface of the light guide plate  124 , through which the light is incident on the inside, may be referred to as a light-incident surface. 
         [0054]    To provide a uniform surface light source, the light guide plate  123  may include predetermined patterns at its rear surface. For example, to guide the light incident on the inside of the light guide plate  123 , the patterns may be elliptical patterns, polygonal patterns or hologram patterns. The patterns may be formed by a printing method or an injecting method. 
         [0055]    The reflection sheet  125  is disposed under the rear surface of the light guide plate  123 . The reflection sheet  125  reflects light passing through the rear surface of the light guide plate  123  toward the liquid crystal panel  110  to increase the brightness. 
         [0056]    The optical sheet  126  is disposed over the light guide plate  123 . The optical sheet  126  includes a diffusion sheet and at least a light-concentrating sheet. The optical sheet  126  diffuses or concentrates light passing through the light guide plate  123  such that more uniform surface light source is provided to the liquid crystal panel  110 . The optical sheet  126  may include first, second and third optical sheets  126   a ,  126   b ,  126   c  sequentially disposed over the light guide plate  124 . 
         [0057]    For instance, each of the first and second optical sheets  126   a  and  126   b  may be a light-concentrating sheet, and the third optical sheet  126   c  may be a diffusion sheet. The light-concentrating sheet may include prism patterns or lenticular patterns. The first optical sheet  126   a  may include lenticular patterns, and the second optical sheet  126   b  may include prism patterns. 
         [0058]    The third optical sheet  126   c  may be a brightness enhancement film. The brightness enhancement film may include layers having different refractive indexes, which are alternately layered. 
         [0059]    The liquid crystal panel  110  and the backlight unit  120  are modularized with the main frame  130 , the top frame  140 , and the bottom frame  150 . 
         [0060]    The main frame  130  has a rectangular frame shape and includes a vertical portion and a horizontal portion. The liquid crystal panel  110  is disposed over the horizontal portion, and the backlight unit  120  is disposed under the horizontal portion. The vertical portion of the main frame  130  surrounds side surfaces of the liquid crystal panel  110 . 
         [0061]    The bottom frame  150  includes a horizontal surface on which the backlight unit  120  is disposed and side surfaces perpendicular to the horizontal surface. The LED assembly  128  is disposed on one of the side surfaces of the bottom frame  150 . 
         [0062]    The top frame  140  has a rectangular frame shape, and the top frame  140  has a cross-sectional surface of a reverse L-like shape to cover edges of a front surface and side surfaces of the liquid crystal panel  110 . The top frame  140  includes an opening at the center of its front surface, and images produced by the liquid crystal panel  110  are displayed to the outside through the opening. 
         [0063]    The top frame  140 , the main frame  130  and the bottom frame  150  are assembled and combined with each other, and the LCD device of the present invention is modularized. The top frame  140  may be omitted. 
         [0064]    The top frame  140  may be referred to as a case top, top case or a top cover. The main frame  130  may be referred to as a guide panel or a main support. The bottom frame  150  may be referred to as a cover bottom or a bottom cover. 
         [0065]    As stated above, the LCD device according to an embodiment of the present invention includes the LED package  128   b  with the blue (B) LED chip, the yellow (Y) phosphor, and the red (R) phosphor. Hereinafter, the LED package  128   b  will be described in more detail with reference to accompanying drawings. 
         [0066]      FIG. 5A  is a perspective view of schematically illustrating an LED package according to an embodiment of the present invention, and  FIG. 5B  is a cross-sectional view of schematically illustrating the LED package according to this embodiment of the present invention. 
         [0067]    In  FIG. 5A  and  FIG. 5B , the LED package  128   b  according to this embodiment of the present invention includes an LED chip  210 , a resin layer  220  containing phosphors, and a mold frame  230 . 
         [0068]    The LED chip  210  may include a first chip  210   a  and a second chip  210   b . Each of the first and second chips  210   a  and  210   b  emits blue light and is electrically connected to the LED printed circuit board  128   a  of  FIG. 3  through a wire bonding. The two chips  210   a  and  210   b  are used, and the number of chips is not limited to this. 
         [0069]    The mold frame  230  has a cavity inside. The first and second chips  210   a  and  210   b  are disposed in the cavity. More particularly, the first and second chips  210   a  and  210   b  are disposed on a bottom surface of the mold frame  230  corresponding to the cavity and are spaced apart from each other. A side surface of the mold frame  230  corresponding to the cavity has an inclined reflective surface  230   a  to send light from the first and second chips  210   a  and  210   b  upwards. The cavity may further include a dented portion corresponding to each of the first and second chips  210   a  and  210   b.    
         [0070]    Although not shown in the figures, the mold frame  230  may include a lower frame and an upper frame which are separable, and a lead frame may be disposed between the lower frame and the upper frame. The lead frame may be connected to the first and second chips  210   a  and  210   b  and provide voltages such that recombination of an electron and a hole is generated in each of the first and second chips  210   a  and  210   b.    
         [0071]    The resin layer  220  containing phosphors is formed in the cavity and covers the first and second chips  210   a  and  210   b . For instance, the phosphors may be dispersed in silicone resin. In addition, the phosphors may include a yellow (Y) phosphor and a red phosphor (R). 
         [0072]    Each of the first and second chips  210   a  and  210   b  has a peak wavelength region of about 444 nm, the yellow (Y) phosphor has a peak wavelength region of about 540 nm, and the red (R) phosphor has a peak wavelength region of about 650 nm. 
         [0073]    The LED package  128   b  according to an embodiment of the present invention relatively decreases a blue intensity and relatively increases yellow and red intensities as compared with a conventional LED package. To accomplish this, the total content of the yellow (Y) phosphor and the red (R) phosphor, beneficially, is about 2.0 wt % to about 20 wt % of a content of the resin layer  220 , and more beneficially, about 5.8 wt % of a content of the resin layer  220 . At this time, it is desirable that the content of the yellow (Y) phosphor is larger than the content of the red (R) phosphor. It is beneficial that the mixing ratio by weight of the yellow (Y) phosphor to the red (R) phosphor is 55:45. 
         [0074]    The LED package  128   b  has an overlap region between red light and green light, and thus the color gamut of an LCD device including the LED package  128   b  is lowered. Accordingly, in the LCD device having the LED package  127   b  according to an embodiment of the present invention, the first polarizer  117  of  FIG. 4  under the liquid crystal panel  110  of  FIG. 4  or the second polarizer  119  of  FIG. 4  over the liquid crystal panel  110  of  FIG. 4  includes a light absorption layer absorbing light within a wavelength range between red and green, and the color gamut of the LCD device increases. 
         [0075]    The light absorption layer may include a light absorption material having an absorption peak in a wavelength region of 590 nm. For example, the light absorption material includes a metal-coordination tetra-azaporphyrin compound expressed by the following chemical formula 1. 
         [0000]    
       
                 
         
             
             
         
       
     
         [0076]    M is selected from Ni, Mg, Mn, Co, Cu, Ru and V. At least one ligand, which is selected from NH 3 , H 2 O and a halogen atom, may be coordinated to any of Ni, Mg, Mn, Co, Cu, Ru and V, such as to, in a particular embodiment, Mn or Ru. In addition, each of R1, R2, R3, and R4 may be independently selected from a C1 to C10 alkyl group and a C6 to C30 aromatic group, and each of a, b, c and d may be 1 or 2. For example, a C1 to C10 alkyl group may include but is not limited to methyl, ethyl, propyl or butyl, and a C6 to C30 aromatic group may be, but is not limited to, phenyl. 
         [0077]      FIG. 6A  illustrates an emission spectrum of an LED package of the LCD device according to an embodiment of the present invention,  FIG. 6B  illustrates an absorption spectrum of a light absorption layer of the LCD device according to an embodiment of the present invention, and  FIG. 6C  is illustrates a spectrum light passing through the LED package and the light absorption layer of the LCD device according to an embodiment of the present invention. 
         [0078]    In  FIG. 6A , light emitted from the LED package of the LCD device according to an embodiment of the present invention a blue peak wavelength, and there is an overlap region in a wavelength range between red and green. 
         [0079]    On the other hand, in  FIG. 6B , the light absorption layer of the LCD device according to an embodiment of the present invention has a strong absorption peak in a wavelength range between red and green. 
         [0080]    Therefore, when the LCD device according to an embodiment of the present invention includes a light absorption layer and light emitted from the LED package passes through the light absorption layer, as shown in  FIG. 6C , the overlap region in the wavelength range between red and green can be removed, and pure red and green can be produced. 
         [0081]    The color gamut of the LCD device including the LED package and the light absorption layer is shown in  FIG. 7 .  FIG. 7  is a view illustrating the color gamut of the LCD device according to an embodiment of the present invention in a CIE (International Commission on Illumination) 1976 chromaticity diagram.  FIG. 7  also shows the DCI (digital cinema initiative) color standard. 
         [0082]    The CIE 1976 chromaticity diagram is chromaticity coordinates suggested to improve a uniform problem between a color matching interval on vision and a color matching interval on coordinates, which is a disadvantage of XYZ chromaticity coordinates, and shows human color perception with u′ and v′. A similar distance on the CIE 1976 chromaticity diagram means a difference between colors similarly perceived. 
         [0083]    In  FIG. 7 , an overlap ratio of the color gamut LAS of the LCD device according to an embodiment of the present invention, which includes the LED package and the light absorption layer, to the DCI color standard is 95%, and the LCD device according to this embodiment of the present invention has relatively wide color gamut. 
         [0084]    The LCD device according to an embodiment of the present invention can have a relatively wide color gamut at relatively low costs by controlling the total content and the mixing ratio of the yellow (Y) and red (R) phosphors of the LED package containing the blue (B) LED chip and by using the light absorption layer absorbing light within a wavelength range between red and green. 
         [0085]    Meanwhile, a condition for white of an LCD device used for televisions requires color coordinates of (Wx, Wy)=(0.278, 0.288) and a color temperature of 10,000K in the CIE 1931 chromaticity diagram. The condition for white according to the DCI color standard can be satisfied within an error range of ±0.015 by using the LED package and the light absorption layer of the present invention. 
         [0086]    In addition, relative luminance efficiency of light passing through the light absorption layer to light emitted from the LED package is more than about 70%, and a decrease in brightness is relatively low. Thus, the power consumption is prevented from increasing. When an optical sheet comprising a brightness enhancement film is disposed under the first polarizer that comprises the light absorption layer, the relative luminance efficiency is more than about 80%, and higher luminance efficiency can be obtained. 
         [0087]    Hereinafter, a polarizer comprising a light absorption layer according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
       First Embodiment 
       [0088]      FIG. 8  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a first embodiment of the present invention. 
         [0089]    In  FIG. 8 , the first polarizer  118  according to the first embodiment of the present invention includes a polarizing film  310 , first and second support films  322  and  324 , an adhesive layer  330 , and a light absorption layer  340 . 
         [0090]    The polarizing film  310  is disposed between the first and second support films  322  and  324 . The adhesive layer  330  is disposed at an outer surface of the first support film  322 , and the light absorption layer  340  is disposed at an outer surface of the second support film  324 . 
         [0091]    The polarizing film  310  may include polyvinyl alcohol (PVA). The polarizing film  310  may be formed by dyeing a PVA film with iodine ions or dichroic dyes and stretching the dyed PVA film. The polarizing film  310  has an absorption axis along a stretching direction, and the polarizing film  310  absorbs light vibrating in a direction parallel to the absorption axis and transmits light vibrating in a direction perpendicular to the absorption axis. The polarizing film  310  may have a thickness of about 25 micrometers. 
         [0092]    Each of the first and second support films  322  and  324  may include tri-acetyl cellulose (TAC), a cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. The first support film  322  corresponds to an inner support film adjacent to the first substrate  112  of  FIG. 4 , and the second support film  324  corresponds to an outer support film adjacent to the optical sheet  126  of  FIG. 4 . The thickness of the first support film  322  may be thinner than the thickness of the second support film  324 . For example, the thickness of the first support film  322  may be about 40 micrometers, and the thickness of the second support film  324  may be about 60 micrometers. However, the thicknesses of the first support film  322  and the second support film  324  may be the same, but are not so limited. The first support film  322  may have phase retardation values of a thickness direction and of a plane direction. The phase retardation values of the thickness direction and of the plane direction may be within a range of −250 nm to +250 nm. Alternatively, the first support film  322  may not have phase retardation values of the thickness direction and of the plane direction, and thus manufacturing costs may be decreased because such a first support film  322  is cheap. 
         [0093]    The support films  322  and  324  may be referred to as protective films. 
         [0094]    The adhesive layer  330  at the outer surface of the first support film  322  may include a pressure sensitive adhesive (PSA). The first polarizer  118  is attached to the first substrate  112  of  FIG. 4  via the adhesive layer  330 . 
         [0095]    In the present invention, the first polarizer  118  includes the adhesive layer  330 . Alternatively, the adhesive layer  330  may be formed on the first substrate  112  of  FIG. 4 . 
         [0096]    The light absorption layer  340  at the outer surface of the second support film  324  includes a binder and light absorption materials  340   a  dispersed in the binder. The binder may include acryl such as an acrylate compound or polymer, and the light absorption material  340   a  may include a material that absorbs light within a wavelength range between red and green. For instance, the light absorbing material  340   a  may include a metal-coordination tetra-azaporphyrin compound expressed by the chemical formula  1 . 
         [0097]    The metal-coordination tetra-azaporphyrin compound may be present in an amount of 0.6 wt % to 1.2 wt % based on the acryl binder. 
         [0098]    If the content of the metal-coordination tetra-azaporphyrin compound is larger than 1.2 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm increases, and the light absorption rate at the wavelength region of 590 nm also increases. Therefore, the color gamut increases, and the brightness decreases. 
         [0099]    In contrast, if the content of the metal-coordination tetra-azaporphyrin compound is smaller than 0.6 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm decreases, and the light absorption rate at the wavelength region of 590 nm also decreases. Therefore, the brightness increases, and the color gamut decreases. 
         [0100]    The metal-coordination tetra-azaporphyrin compound may be present, beneficially, in an amount of 0.8 wt % to 1.1 wt %, and more beneficially, in an amount of about 1.0 wt % based on the acryl binder. 
         [0101]    The light absorption layer  340  may further include beads  340   b  therein. The beads  340   b  may include poly(methyl) methacrylate (PMMA). The beads  340   b  diffuse light and form an uneven surface to thereby prevent a wet-out phenomenon between films contacting each other and prevent a surface of a film from being scratched. 
         [0102]    In the present invention, the light absorption layer  340  includes the beads  340   b , but the beads  340   b  may be omitted. 
         [0103]    The light absorption layer  340  may be formed by a coating method and may have a thickness of about 3 micrometers to about 10 micrometers. 
         [0104]    The first polarizer  118  according to the first embodiment of the present invention includes the light absorption layer  340  at its surface, and the overlap region in the wavelength range between red and green of light from the LED package is removed. Thus, the color gamut of the LCD device increases. 
       Second Embodiment 
       [0105]      FIG. 9  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a second embodiment of the present invention. 
         [0106]    In  FIG. 9 , the first polarizer  118  according to the second embodiment of the present invention includes a polarizing film  410 , first and second support films  422  and  424 , an adhesive layer  430 , and a light absorption sheet  440 . 
         [0107]    The polarizing film  410  is disposed between the first and second support films  422  and  424 . The adhesive layer  430  is disposed at an outer surface of the first support film  422 , and the light absorption sheet  440  is disposed at an outer surface of the second support film  424 . 
         [0108]    The polarizing film  410  may include polyvinyl alcohol (PVA). The polarizing film  410  may be formed by dyeing a PVA film with iodine ions or dichroic dyes and stretching the dyed PVA film. The polarizing film  410  has an absorption axis along a stretching direction, and the polarizing film  410  absorbs light vibrating in a direction parallel to the absorption axis and transmits light vibrating in a direction perpendicular to the absorption axis. The polarizing film  410  may have a thickness of about 25 micrometers. 
         [0109]    Each of the first and second support films  422  and  424  may include tri-acetyl cellulose (TAC), cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. The first support film  422  corresponds to an inner support film adjacent to the first substrate  112  of  FIG. 4 , and the second support film  424  corresponds to an outer support film adjacent to the optical sheet  126  of  FIG. 4 . The thickness of the first support film  422  may be thinner than the thickness of the second support film  424 . For example, the thickness of the first support film  422  may be about 40 micrometers, and the thickness of the second support film  424  may be about 60 micrometers. However, the thicknesses of the first support film  422  and the second support film  424  may be the same, and they are not so limited. The first support film  422  may have phase retardation values of a thickness direction and of a plane direction. The phase retardation values of the thickness direction and of the plane direction may be within a range of −250 nm to +250 nm. Alternatively, the first support film  422  may not have the phase retardation values of the thickness direction and of the plane direction, and thus manufacturing costs may be decreased because such a first support film  422  is cheap. 
         [0110]    The support films  422  and  424  may be referred to as protective films. 
         [0111]    The adhesive layer  430  at the outer surface of the first support film  422  may include a pressure sensitive adhesive (PSA). The first polarizer  118  is attached to the first substrate  112  of  FIG. 4  via the adhesive layer  430 . 
         [0112]    In the present invention, the first polarizer  118  includes the adhesive layer  430 . Alternatively, the adhesive layer  430  may be formed on the first substrate  112  of  FIG. 4 . 
         [0113]    The light absorption sheet  440  at the outer surface of the second support film  424  includes a light absorption layer  442  and first and second base films  444  and  446 . 
         [0114]    Each of the first and second base films  444  and  446  may include polyethylene terephthalate or polycarbonate. Each of the first and second base films  444  and  446  may have a thickness of about 100 micrometers. 
         [0115]    The light absorption layer  442  is disposed between the first and second base films  444  and  446 . Therefore, wrinkles are prevented from being generated in the light absorption sheet  440 , and image qualities of the LCD device are prevented from being lowered. 
         [0116]    The light absorption layer  442  may have a thickness of about 3 micrometers to about 20 micrometers. 
         [0117]    The light absorption layer  442  includes a binder and light absorption materials  440   a  dispersed in the binder. The binder may include acryl such as an acrylate compound or polymer, and the light absorption material  440   a  may include a material absorbing light within a wavelength range between red and green. For instance, the light absorbing material  440   a  may include a metal-coordination tetra-azaporphyrin compound expressed by the chemical formula 1. 
         [0118]    The metal-coordination tetra-azaporphyrin compound may be present in an amount of 0.6 wt % to 1.2 wt % based on the acryl binder. 
         [0119]    If the content of the metal-coordination tetra-azaporphyrin compound is larger than 1.2 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm increases, and the light absorption rate at the wavelength region of 590 nm also increases. Therefore, the color gamut increases, and the brightness decreases. 
         [0120]    On the other hand, if the content of the metal-coordination tetra-azaporphyrin compound is smaller than 0.6 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm decreases, and the light absorption rate at the wavelength region of 590 nm also decreases. Therefore, the brightness increases, and the color gamut decreases. 
         [0121]    The metal-coordination tetra-azaporphyrin compound may be present, beneficially, in an amount of 0.8 wt % to 1.1 wt %, and more beneficially, in an amount of about 1.0 wt % based on the acryl binder. 
         [0122]    The second base film  446  may be omitted, and the light absorption layer  442  may be directly attached to the second support film  424 . In this case, the light absorption layer  442  may have an adhesive property. 
         [0123]    The light absorption sheet  440  may be formed by a lamination method or a coating method. 
         [0124]    The first polarizer  118  according to the second embodiment of the present invention includes the light absorption layer  442  at its surface, and the overlap region in the wavelength range between red and green light from the LED package is removed. Thus, the color gamut of the LCD device increases. 
         [0125]    The light absorption layer  442  is disposed between the first and second base films  444  and  446 , and the wrinkles are prevented from being generated in the light absorption sheet  440 , and the image qualities of the LCD device are prevented from being lowered. 
       Third Embodiment 
       [0126]      FIG. 10  is a cross-sectional view schematically illustrating a first polarizer including a light absorption layer according to a third embodiment of the present invention. 
         [0127]    In  FIG. 10 , the first polarizer  118  according to the third embodiment of the present invention includes a polarizing film  510 , first and second support films  522  and  524 , and a light absorption layer  540 . 
         [0128]    The polarizing film  510  is disposed between the first and second support films  522  and  524 , and the light absorption layer  540  is disposed at an outer surface of the first support film  522 . 
         [0129]    The polarizing film  510  may include polyvinyl alcohol (PVA). The polarizing film  510  may be formed by dyeing a PVA film with iodine ions or dichroic dyes and stretching the dyed PVA film. The polarizing film  510  has an absorption axis along a stretching direction, and the polarizing film  510  absorbs light vibrating in a direction parallel to the absorption axis and transmits light vibrating in a direction perpendicular to the absorption axis. The polarizing film  510  may have a thickness of about 25 micrometers. 
         [0130]    Each of the first and second support films  522  and  524  may include tri-acetyl cellulose (TAC), cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. The first support film  522  corresponds to an inner support film adjacent to the first substrate  112  of  FIG. 4 , and the second support film  524  corresponds to an outer support film adjacent to the optical sheet  126  of  FIG. 4 . The thickness of the first support film  522  may be thinner than the thickness of the second support film  524 . For example, the thickness of the first support film  522  may be about 40 micrometers, and the thickness of the second support film  524  may be about 60 micrometers. However, the thicknesses of the first support film  522  and the second support film  524  may be the same, and they are not so limited. The first support film  522  may have phase retardation values of a thickness direction and of a plane direction. The phase retardation values of the thickness direction and of the plane direction may be within a range of −250 nm to +250 nm. Alternatively, the first support film  522  may not have the phase retardation values of the thickness direction and of the plane direction, and thus manufacturing costs may be decreased because such a first support film  522  is cheap. 
         [0131]    The support films  522  and  524  may also be referred to as protective films. 
         [0132]    The light absorption layer  540  at the outer surface of the first support film  522  includes a binder and light absorption materials  540   a  dispersed in the binder. The binder may include acryl such as an acrylate compound or polymer, and the light absorption material  540   a  may include a material absorbing light within a wavelength range between red and green. For instance, the light absorbing material  540   a  may include a metal-coordination tetra-azaporphyrin compound expressed by the chemical formula 1. 
         [0133]    The metal-coordination tetra-azaporphyrin compound may be present in an amount of 0.6 wt % to 1.2 wt % based on the acryl binder. 
         [0134]    If the content of the metal-coordination tetra-azaporphyrin compound is larger than 1.2 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm increases, and the light absorption rate at the wavelength region of 590 nm also increases. Therefore, the color gamut increases, and the brightness decreases. 
         [0135]    On the other hand, if the content of the metal-coordination tetra-azaporphyrin compound is smaller than 0.6 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm decreases, and the light absorption rate at the wavelength region of 590 nm also decreases. Therefore, the brightness increases, and the color gamut decreases. 
         [0136]    The metal-coordination tetra-azaporphyrin compound may be present, beneficially, in an amount of 0.8 wt % to 1.1 wt %, and more beneficially, in an amount of about 1.0 wt % based on the acryl binder. 
         [0137]    The light absorption layer  540  may have an adhesive property, and the first polarizer  118  may be attached to the first substrate  112  of  FIG. 4  via the light absorption layer  540 . The light absorption layer  540  may include a pressure sensitive adhesive (PSA). 
         [0138]    The light absorption layer  540  may be formed by a coating method. 
         [0139]    The first polarizer  118  according to the third embodiment of the present invention includes the light absorption layer  540  at its surface, and the overlap region in the wavelength range between red and green light from the LED package is removed. Thus, the color gamut of the LCD device increases. 
         [0140]    Since the light absorption layer  540  functions as an adhesive layer, materials are reduced, manufacturing process are simplified, and a volume of the LCD device is decreased. 
       Fourth Embodiment 
       [0141]      FIG. 11  is a cross-sectional view schematically illustrating a second polarizer including a light absorption layer according to a fourth embodiment of the present invention. 
         [0142]    In  FIG. 11 , the second polarizer  119  according to the fourth embodiment of the present invention includes a polarizing film  610 , first and second support films  622  and  624 , and a light absorption layer  630 . The polarizing film  610  is disposed between the first and second support films  622  and  624 , and the light absorption layer  630  is disposed at an outer surface of the first support film  622 . 
         [0143]    The polarizing film  610  may include polyvinyl alcohol (PVA). The polarizing film  610  may be formed by dyeing a PVA film with iodine ions or dichroic dyes and stretching the dyed PVA film. The polarizing film  610  has an absorption axis along a stretching direction, and the polarizing film  610  absorbs light vibrating in a direction parallel to the absorption axis and transmits light vibrating in a direction perpendicular to the absorption axis. The polarizing film  610  may have a thickness of about 25 micrometers. 
         [0144]    Each of the first and second support films  622  and  624  may include tri-acetyl cellulose (TAC), cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. The first support film  622  corresponds to an inner support film adjacent to the second substrate  114  of  FIG. 4 , and the second support film  624  corresponds to an outer support film. The thickness of the first support film  622  may be thinner than the thickness of the second support film  624 . For example, the thickness of the first support film  622  may be about 40 micrometers, and the thickness of the second support film  624  may be about 60 micrometers. However, the thicknesses of the first support film  622  and the second support film  624  may be the same, and are not so limited. The first support film  622  may have phase retardation values of a thickness direction and of a plane direction. The phase retardation values of the thickness direction and of the plane direction may be within a range of −250 nm to +250 nm. Alternatively, the first support film  622  may not have the phase retardation values of the thickness direction and of the plane direction, and thus manufacturing costs may be decreased because such a first support film  622  is cheap. 
         [0145]    The support films  622  and  624  may also be referred to as protective films. 
         [0146]    The light absorption layer  630  at the outer surface of the first support film  622  includes a binder and light absorption materials  630   a  dispersed in the binder. The binder may include acryl such as an acrylate compound or polymer, and the light absorption material  630   a  may include a material absorbing light within a wavelength range between red and green. For instance, the light absorbing material  630   a  may include a metal-coordination tetra-azaporphyrin compound expressed by the chemical formula 1. 
         [0147]    The metal-coordination tetra-azaporphyrin compound may be present in an amount of 0.6 wt % to 1.2 wt % based on the acryl binder. 
         [0148]    If the content of the metal-coordination tetra-azaporphyrin compound is larger than 1.2 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm increases, and the light absorption rate at the wavelength region of 590 nm also increases. Therefore, the color gamut increases, and the brightness decreases. 
         [0149]    On the other hand, if the content of the metal-coordination tetra-azaporphyrin compound is smaller than 0.6 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm decreases, and the light absorption rate at the wavelength region of 590 nm also decreases. Therefore, the brightness increases, and the color gamut decreases. 
         [0150]    The metal-coordination tetra-azaporphyrin compound may be present, beneficially, in an amount of 0.8 wt % to 1.1 wt %, and more beneficially, in an amount of about 1.0 wt % based on the acryl binder. 
         [0151]    Thelight absorption layer  630  may have an adhesive property, and the second polarizer  119  may be attached to the second substrate  114  of  FIG. 4  via the light absorption layer  630 . The light absorption layer  630  may include a pressure sensitive adhesive (PSA). 
         [0152]    The light absorption layer  630  may be formed by a coating method. 
         [0153]    In addition, the second polarizer  119  may further include a surface treatment layer  640  at an outer surface of the second support film  624 . The surface treatment layer  640  may have functions such as low reflection, anti glare and/or hard coating by surface treatments. The surface treatment layer  640  may include acryl such as an acrylate compound or polymer, but it is not so limited. 
         [0154]    The second polarizer  119  according to the fourth embodiment of the present invention includes the light absorption layer  630  at its surface, and the overlap region in the wavelength range between red and green light from the LED package is removed. Thus, the color gamut of the LCD device increases. 
         [0155]    Since the light absorption layer  540  functions as an adhesive layer, materials are reduced, manufacturing processes are simplified, and the volume of the LCD device is decreased. 
         [0156]    In the fourth embodiment of the present invention, since the external light, which is incident on and is reflected by the liquid crystal panel  110  of  FIG. 4 , is absorbed by the light absorption layer  630 , reflection of the external light decreases. Therefore, the contrast ratio of the LCD device increases. 
         [0157]    Moreover, in the fourth embodiment of the present invention, when light from the backlight unit  120  of  FIG. 4  passes through the liquid crystal panel  110  of  FIG. 4  and is outputted to the outside, light scattered, diffracted or reflected by the liquid crystal layer is absorbed by the light absorption layer  630  of the second polarizer  119 . Thus, the degree of the polarization of the second polarizer  119  increases, and black visibility further decreases. 
         [0158]    Therefore, the front contrast ratio of the LCD device is increased, and viewing angle properties are improved. 
       Fifth Embodiment 
       [0159]      FIG. 12  is a cross-sectional view schematically illustrating a second polarizer including a light absorption layer according to a fifth embodiment of the present invention. 
         [0160]    In  FIG. 12 , the second polarizer  119  according to the fifth embodiment of the present invention includes a polarizing film  710 , a protective film  722 , a light absorption layer  724 , and an adhesive layer  730 . The polarizing film  710  is disposed between the protective film  722  and the light absorption layer  724 , and the adhesive layer  730  is disposed at an outer surface of the protective film  722 . 
         [0161]    The polarizing film  710  may include polyvinyl alcohol (PVA). The polarizing film  710  may be formed by dyeing a PVA film with iodine ions or dichroic dyes and stretching the dyed PVA film. The polarizing film  710  has an absorption axis along a stretching direction, and the polarizing film  710  absorbs light vibrating in a direction parallel to the absorption axis and transmits light vibrating in a direction perpendicular to the absorption axis. The polarizing film  710  may have a thickness of about 25 micrometers. 
         [0162]    The protective film  722  may include tri-acetyl cellulose (TAC), cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. The protective film  722  is disposed adjacently to the second substrate  114  of  FIG. 4 . The protective film  722  may have phase retardation values of a thickness direction and of a plane direction to compensate viewing angles. The phase retardation values of the thickness direction and of the plane direction may be within a range of −250 nm to +250 nm. Alternatively, the protective film  722  may not have the phase retardation values of the thickness direction and of the plane direction, and thus manufacturing costs may be decreased because such a protective film  722  is inexpensive. 
         [0163]    The adhesive layer  730  at the outer surface of the protective film  722  may include a pressure sensitive adhesive (PSA). The second polarizer  119  is attached to the second substrate  114  of  FIG. 4  via the adhesive layer  730 . 
         [0164]    The second polarizer  119  includes the adhesive layer  730 . Alternatively, the adhesive layer  730  may be formed on the second substrate  114  of  FIG. 4 . 
         [0165]    The light absorption layer  724  includes a binder and light absorption materials  724   a  dispersed in the binder. The light absorption material  724   a  may include a material absorbing light within a wavelength range between red and green. For instance, the light absorbing material  724   a  may include a metal-coordination tetra-azaporphyrin compound expressed by the chemical formula 1. 
         [0166]    The metal-coordination tetra-azaporphyrin compound may be present in an amount of 0.6 wt % to 1.2 wt % based on the acryl binder. 
         [0167]    If the content of the metal-coordination tetra-azaporphyrin compound is larger than 1.2 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm increases, and the light absorption rate at the wavelength region of 590 nm also increases. Therefore, the color gamut increases, and the brightness decreases. 
         [0168]    On the other hand, if the content of the metal-coordination tetra-azaporphyrin compound is smaller than 0.6 wt %, the intensity of the absorption spectrum at the wavelength region of 590 nm decreases, and the light absorption rate at the wavelength region of 590 nm also decreases. Therefore, the brightness increases, and the color gamut decreases. 
         [0169]    The metal-coordination tetra-azaporphyrin compound may be present, beneficially, in an amount of 0.8 wt % to 1.1 wt %, and more beneficially, in an amount of about 1.0 wt % based on the acryl binder. 
         [0170]    The binder may be selected from tri-acetyl cellulose (TAC), cyclic olefin polymer (COP), polyethylene terephthalate (PET), or acryl such as an acrylate compound or polymer. 
         [0171]    The protective film  722  serves as an inner support film, and the light absorption layer  724  functions as an outer support film. The thickness of the light absorption layer  724  may be thicker than the thickness of the protective film  722 . For example, the thickness of the light absorption layer  724  may be about 60 micrometers, and the thickness of the protective film  722  may be about 40 micrometers. However, the thicknesses of the light absorption layer  724  and the protective film  722  may be the same, and they are not limited to this. 
         [0172]    In addition, the second polarizer  119  may further include a surface treatment layer  740  at an outer surface of the light absorption layer  724 . The surface treatment layer  740  may have functions such as low reflection, anti glare and/or hard coating by surface treatments. The surface treatment layer  740  may include acryl such as an acrylate compound or polymer, but it is not so limited. 
         [0173]    The second polarizer  119  according to the fifth embodiment of the present invention includes the light absorption layer  724  at its surface, and the overlap region in the wavelength range between red and green light from the LED package is removed. Thus, the color gamut of the LCD device increases. 
         [0174]    In the fifth embodiment of the present invention, since the external light, which is incident on and is reflected by the liquid crystal panel  110  of  FIG. 4 , is absorbed by the light absorption layer  724 , reflection of the external light decreases. Therefore, the contrast ratio of the LCD device increases. 
         [0175]    Moreover, in the fifth embodiment of the present invention, when light from the backlight unit  120  of  FIG. 4  passes through the liquid crystal panel  110  of  FIG. 4  and is outputted to the outside, light scattered, diffracted or reflected by the liquid crystal layer is absorbed by the light absorption layer  724  of the second polarizer  119 . Thus, the degree of the polarization of the second polarizer  119  increases, and black visibility further decreases. Therefore, the front contrast ratio of the LCD device is increased, and viewing angle properties are improved. 
         [0176]    In the fifth embodiment of the present invention, the second polarizer  119  includes the light absorption layer  724  at an outer surface of the polarizing film  710 . The light absorption layer  724  may be embodied by adding the light absorption materials  724   a  in an outer support film. Alternatively, the light absorption layer  724  at the outer surface of the polarizing film  710  may be embodied by removing the light absorption materials  724   a  from the outer support film and adding the light absorption materials  724   a  in the surface treatment layer  740 . 
         [0177]    The LCD device according to the fourth and fifth embodiments, in which the second polarizer includes the light absorption layer, has advantages of low reflectance, an increasing contrast ratio, and an improved viewing angle properties as compared to the LCD device according to the first, second and third embodiments, in which the second polarizer includes the light absorption layer. For instance, on the basis of 550 nm, the LCD device according to the first, second and third embodiments has the reflectance of about 5.5% while the LCD device according to the fourth and fifth embodiments has the reflectance of about 3.7%. Therefore, the LCD device according to the fourth and fifth embodiments has the reflectance decreased by about 33% in comparison with the LCD device according to the first, second and third embodiments. 
         [0178]    Furthermore, the LCD device according to the fourth and fifth embodiments has the front contrast ratio improved by about 8% in the outer circumstances having illuminance of 0 Lux and the front contrast ratio improved by about 25% in the outer circumstances having illuminance of 200 Lux as compared to the LCD device according to the first, second, and third embodiments. 
         [0179]    In the above embodiments, the LCD device includes an edge type backlight unit. Alternatively, the LCD device of the present invention may include a direct type backlight unit, in which the light guide panel is omitted. 
         [0180]    In the present invention, by adjusting the total content and the mixing ratio of the yellow and red phosphors of the LED package containing the blue LEC chip and applying the light absorption layer absorbing light within a wavelength range between red and green to the upper polarizer or the lower polarizer of the liquid crystal panel, a change in components can be minimized, and the LCD device having the wide color gamut can be achieved in a simple way. 
         [0181]    The light absorption layer can be formed at relatively low costs. An increase in the manufacturing costs of the LCD device is minimized, and the LCD device has a competitive price. 
         [0182]    In addition, the light absorption layer can be disposed at one of various positions in the upper polarizer or the lower polarizer of the liquid crystal panel, and the light absorption layer can have further functions by adding the beads or the adhesive. Thus, the degree of design can be increased. 
         [0183]    When the light absorption layer is applied to the upper polarizer of the liquid crystal panel, the reflectance of the external light can be lowered, and the front contrast ratio and the viewing angle properties can be improved. 
         [0184]    It will be apparent to those skilled in the art that various modifications and variations can be made in a display device of the present disclosure without departing from the sprit or scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.