KR20170010189A

KR20170010189A - Liquid crystal display device

Info

Publication number: KR20170010189A
Application number: KR1020150100839A
Authority: KR
Inventors: 임태경; 윤여건
Original assignee: 삼성디스플레이 주식회사
Priority date: 2015-07-16
Filing date: 2015-07-16
Publication date: 2017-01-26

Abstract

The present invention provides a liquid crystal display device. The liquid crystal display device according to one embodiment of the present invention comprises: a light source; an upper light transmissive substrate; a lower light transmissive substrate arranged between the light source and the upper light transmissive substrate; a liquid crystal layer arranged between the upper light transmissive substrate and the lower light transmissive substrate; a conductive wire grid polarizing plate consisting of conductive partitions that are arranged between the lower light transmissive substrate and the liquid crystal layer to be spaced apart from one another so as to transmit first polarized light from incident light, and including conductive wire grid patterns that reflect second polarized light, which is vertical to the first polarized light; and a color filter layer including red color filters, green color filters, blue color filters, and white color filters, and arranged between the liquid crystal layer and the upper light transmissive substrate. The present invention provides a liquid crystal display device that uses a reflective polarizing plate as a lower polarizing plate and performs a function of a mirror.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

The invention relates to a liquid crystal display device.

A liquid crystal display (LCD) applies an electric field to a liquid crystal material having anisotropic permittivity injected between two substrates, adjusts the intensity of the electric field, and adjusts the amount of light transmitted through the substrate to display a desired image .

The liquid crystal display device can exhibit a mirror function by adopting a reflective polarizer as an upper polarizer disposed on a display panel including a liquid crystal layer. However, the liquid crystal display uses a reflection type polarizing plate as a lower polarizing plate disposed below the display panel, and a color filter composed of a red color filter, a green color filter, and a blue color filter arranged on the reflective polarizing plate In the case of using the color filter, the liquid crystal display device has difficulty in exhibiting a mirror function because there is no light transmitting region in the color filter other than the region for realizing the image.

An object of the present invention is to provide a liquid crystal display device using a reflection type polarizing plate as a lower polarizing plate and having a mirror function.

Embodiments of the present invention are not limited to the technical matters mentioned above, and other embodiments not mentioned can be understood by those skilled in the art from the following description.

A liquid crystal display device according to an embodiment of the present invention includes a light source, an upper transmissive substrate, a lower transmissive substrate disposed between the light source and the upper transmissive substrate, a liquid crystal layer disposed between the upper transmissive substrate and the lower transmissive substrate A second polarized light perpendicular to the first polarized light and a second polarized light perpendicular to the first polarized light, the first polarized light being arranged between the lower transparent substrate and the liquid crystal layer, And a color filter layer disposed between the liquid crystal layer and the upper light-transmitting substrate, the conductive wire grid polarizer including red color filters, green color filters, blue color filters, and white color filters, .

A liquid crystal display device according to another embodiment of the present invention includes a light source, an upper transmissive substrate, a lower transmissive substrate disposed between the light source and the upper transmissive substrate, a liquid crystal display device disposed between the upper transmissive substrate and the lower transmissive substrate, A second transparent substrate disposed between the lower transparent substrate and the liquid crystal layer, the first polarized light being perpendicular to the first polarized light and the second polarized light being perpendicular to the first polarized light; Wherein the conductive wire grid polarizer comprises a conductive wire grid polarizer and red color filters, green color filters, blue color filters, and white color filters comprising a reflective conductive wire grid pattern, wherein the conductive wire grid polarizer is disposed between the liquid crystal layer and the conductive wire grid polarizer And a color filter layer.

The liquid crystal display device according to embodiments of the present invention may further include an absorption type polarizing plate. For example, the absorption type polarizing plate may include a polyvinyl alcohol (PVA) polarizing film in which iodine is dyed.

And the upper transmissive substrate may be disposed between the absorption type polarizing plate and the liquid crystal layer.

The conductive wire grid polarizer may further include reflection patterns disposed between the conductive wire grid patterns in an image display area to reflect both the first polarized light and the second polarized light.

The reflection patterns are arranged to overlap with the white color filters.

A liquid crystal display device according to embodiments of the present invention may include a subpixel array structure in which a white subpixel is disposed between two subpixels selected from a red subpixel, a green subpixel, and a blue subpixel.

A liquid crystal display device according to embodiments of the present invention includes a first white sub-pixel, a second green sub-pixel, and a third blue sub-pixel arranged in an alternating arrangement of a first red subpixel, a second green subpixel, Pixel arrangement structure in which the first sub-pixel array structure is arranged.

A liquid crystal display device according to embodiments of the present invention includes a liquid crystal display panel in which one of a second red subpixel, a second green subpixel, and a second blue subpixel is disposed along a second direction perpendicular to the first direction, And a second subpixel array structure disposed between the first subpixel array and the second subpixel array.

The liquid crystal display device according to embodiments of the present invention may include a pixel array structure in which white pixels are arranged between red, green, and blue subpixels of RGB pixels arranged alternately.

A liquid crystal display device according to embodiments of the present invention includes a first pixel array structure in which red, green, and blue sub-pixels are alternately arranged along a first direction, And a second pixel array structure in which white pixels are arranged between the RGB pixels along a second direction perpendicular to the first direction.

The details of other embodiments are included in the detailed description and drawings.

In the liquid crystal display according to the embodiments of the present invention, the external light incident through the white color filters may be reflected by the conductive wire grid polarizer to exhibit a mirror function.

The effects according to the invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a schematic cross-sectional view of a liquid crystal display device according to a first embodiment.
2 is an enlarged view of the area A in Fig.
3 is a schematic perspective view of the conductive wire grid polarizer of FIG.
Figs. 4 to 5 schematically show arrangement structures of sub-pixels of the liquid crystal display device of Fig.
Figs. 6 to 7 schematically show arrangement structures of pixels of the liquid crystal display device of Fig. 1. Fig.
8 is a schematic cross-sectional view of a liquid crystal display device according to the second embodiment.
9 is an enlarged view of the area B in Fig.
10 is a schematic cross-sectional view of a liquid crystal display device according to the third embodiment.
11 is an enlarged view of the area C in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of layers and regions in the figures may be exaggerated for clarity of illustration.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above" indicates that no other device or layer is interposed in between.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a schematic cross-sectional view of a liquid crystal display 1000 according to the first embodiment. 2 is an enlarged view of the area A in Fig. 3 is a schematic perspective view of the conductive wire grid polarizer WGP1 of Fig. Hereinafter, the liquid crystal display device 1000 will be described in detail with reference to FIGS. 1 to 3. FIG.

The liquid crystal display device 1000 may include a first display substrate 100, a liquid crystal layer 200, a second display substrate 300, a backlight unit BLU, and an absorption type polarizer POL. The first display substrate 100 and the second display substrate 300 can be attached together by a seal line (not shown) made of a sealant or the like, and a seal line (not shown) And a non-display area (not shown) as a peripheral part of the second display substrate 300. The liquid crystal layer 200 is interposed between the first display substrate 100 and the second display substrate 300 and includes liquid crystal molecules LC. The liquid crystal molecules LC may be, for example, liquid crystal molecules LC having a negative dielectric constant anisotropy.

The first display substrate 100 may include a first transmissive substrate US, a color filter layer CF, a black matrix BM, an overcoat layer OC, and a common electrode CE. The color filter layer CF and the black matrix BM may be disposed between the first transmissive substrate US and the common electrode CE. The overcoat layer OC may be disposed between the color filter layer CF and the common electrode CE and between the black matrix BM and the common electrode CE.

The second display substrate 200 may include a second transmissive substrate LS, a first conductive wire grid polarizer WGP1, an insulating film WI, a thin film transistor array layer (TFTA), and a pixel electrode PE. The first conductive wire grid polarizer WGP1 may include a conductive wire grid pattern layer WG in which an air layer AG is disposed between mutually spaced conductive barrier walls CW. The conductive wire grid pattern layer WG may be disposed between the second transmissive substrate LS and the insulating film WI. The insulating film WI may be disposed between the conductive wire grid pattern layer WG and the pixel electrode PE. The thin film transistor array layer (TFTA) may be disposed between the pixel electrode (PE) and the insulating film (WI).

The color filter layer CF includes red color filters R, green color filters G, blue color filters B and white color filters W. [ The light Li may be incident into the liquid crystal layer 200 through the white color filters W and the incident light Li may be incident on the conductive partition walls CW of the wire grid pattern layer WG, And the light Li reflected by the conductive barrier ribs CW may be emitted to the outside through the white color filters W again. That is, the white color filters W can serve as a light-emitting window of light Li incident on the liquid crystal layer 200 from outside and light Li reflected from the conductive wire grid pattern layer WG. The red color filters R, the green color filters G, and the blue color filters B correspond to an image area for implementing an image.

If the first translucent substrate US can transmit visible light, the material thereof can be appropriately selected in accordance with the application or the process. As the first transparent substrate US, for example, glass, quartz, polyethersulphone (PES), polyacrylate (PA), polyarylate (PAR) Polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide, Various polymeric compounds such as PI, polycarbonate (PC), cellulose triacetate (CAT or TAC), and cellulose acetate propionate (CAP) may be used. It is not.

The color filter layer CF and the black matrix BM may be disposed on the first transmissive substrate US. The black matrix BM may be disposed at the boundary between the respective color filters R, G, B, and W on the first transparent substrate US. For example, the black matrix BM may be arranged between the red color filter R and the white color filter W, between the green color filter G and the white color filter W, between the blue color filter B and white And the color filters W, respectively.

The overcoat layer OC may be disposed on the color filter CF and the black matrix BM. The overcoat layer OC may be composed of, for example, an inorganic material such as silicon oxide or silicon nitride.

The common electrode CE may be disposed on the overcoat layer OC. The common electrode CE may be arranged to face the pixel electrode PE to form an electric field in the liquid crystal layer 200. [ The common electrode CE may be formed of indium tin oxide, indium zinc oxide, indium oxide, zinc oxide, tin oxide, gallium oxide, titanium oxide, aluminum, silver, platinum, chromium, molybdenum, tantalum, niobium, zinc, Or a laminated film thereof.

If the second translucent substrate LS can transmit visible light, its material can be appropriately selected in accordance with the application or the process. As the second translucent substrate LS, for example, glass, quartz, polyethersulphone (PES), polyacrylate (PA), polyarylate (PAR) Polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide, Various polymeric compounds such as PI, polycarbonate (PC), cellulose triacetate (CAT or TAC), and cellulose acetate propionate (CAP) may be used. It is not.

The conductive wire grid pattern layers WG may be disposed on the second transmissive substrate LS and may be composed of mutually spaced conductive barrier walls CW. An air layer AG may be disposed between the conductive barriers CW. For example, the conductive barriers CW may have a line width W of about 100 nm or less, a thickness of about 150 nm or more, and a spacing distance T of about 100 nm or less, It is not. The conductive wire grid pattern layer WG can be fabricated using a nanoimprint method or the like.

The light Li incident on the conductive wire grid pattern layer WG is polarized by the conductive partition walls CW. Conductive barrier walls CW spaced apart from each other at predetermined intervals transmit the first polarized light of the incident light Li and reflect the second polarized light perpendicular to the first polarized light. Specifically, the S wave which is a polarization component parallel to the extending direction (that is, the first direction D1) of the conductive partition walls CW in the incident light Li is reflected by the conductive partition walls CW, The P wave which is a polarization component parallel to the direction (that is, the second direction D2) orthogonal to the extending direction of the beams CW is recognized and transmitted as an effective refractive medium.

The conductive barrier walls CW may be a laminated structure of the first layer WG1 and the second layer WG2 and the first layer WG1 may be formed of one of the first transition metal, Of metal. For example, the first layer WG1 may be made of one of aluminum (Al), chrome (Cr), gold (Au), silver (Ag), copper (Cu), nickel (Ni) . The second layer WG2 is disposed on the first layer WG1 and can serve as a capping layer for preventing hillocks that may occur at the interface with the first layer WG1. The second layer WG2 may be composed of a material having an etching selectivity ratio higher than that of the first layer WG1. For example, the second layer WG2 may be made of a second transition metal different from the first transition metal, and the second transition metal may be, for example, titanium (Ti), cobalt (Co), molybdenum (Mo) ) And alloys thereof.

The insulating film WI may be disposed between the conductive wire grid pattern layer WG and the thin film transistor array layer TFTA to insulate them. The insulating film WI may be made of an inorganic material such as silicon nitride, silicon oxide, or the like.

The thin film transistor array layer (TFTA) may include a thin film transistor (TFT) and an organic passivation film (OPL). The thin film transistor (TFT) may be configured as follows.

A gate electrode G is disposed on the insulating film WI and a gate insulating film GI is disposed on the gate electrode G. [ The semiconductor layer ACT is located on the gate insulating layer GI in a region where the gate electrode G overlaps at least a part of the gate electrode G and the ohmic contact layer OL is disposed on the semiconductor layer ACT, A source electrode S and a drain electrode D are respectively located on the layer OL. The inorganic passivation film IPL is disposed on the gate insulating film GI, the source electrode S, the semiconductor layer ACT and the drain electrode D and the organic passivation film OPL is disposed on the inorganic passivation film IPL .

The pixel electrode PE may be disposed on the organic passivation film OPL as an electric field generating electrode. A contact hole TH is formed in the organic passivation film OPL and the pixel electrode PE can be electrically connected to the drain electrode D through the contact hole TH.

The absorption type polarizing plate POL may be disposed on the first transmissive substrate US. The first transparent substrate US may be disposed between the absorption type polarizing plate POL and the color filter layer CF. Although not shown, the absorption type polarizing plate (POL) can be composed of a polyvinyl alcohol (PVA) polarizing film in which iodine is dyed, and a protective film for protecting a polyvinyl alcohol (PVA) polarizing film. When a reflective polarizer is used as the upper polarizer, the light Li may be reflected by the upper reflective polarizer and may not reach the white color filter layer. Therefore, it is preferable that the upper polarizer uses an absorption polarizer.

The liquid crystal display device 1000 may further include a backlight unit (BLU) on a lower portion of the second display substrate 300. The backlight unit BLU may further include a light guide plate (not shown), a light source (not shown), a reflective member (not shown), an optical sheet (not shown), and the like. The display apparatus 1000 can output an image through the first display substrate 100. [ That is, the image can be output through the first transparent substrate US.

FIGS. 4 to 5 schematically show the arrangement structures of the sub-pixels RP, WP, GP, and BP of the liquid crystal display 1000 of FIG.

Referring to FIG. 4, the subpixels RP, WP, GP, and BP may be arranged in a first matrix array structure. In the first matrix array structure, the white subpixel WP is a region where light (Li in FIG. 1) is incident from the outside and is reflected to the conductive wire grid pattern layer (WG in FIG. 1) The subpixel WP may be disposed between two subpixels selected from a red subpixel RP, a green subpixel GP, and a blue subpixel BP. For example, one row may include a red subpixel RP, a white subpixel WP, a green subpixel GP, a white subpixel WP, a blue subpixel BP, And the two rows may be arranged as a white subpixel WP, a blue subpixel BP, a white subpixel WP, a red subpixel RP, a white subpixel WP, Can be alternately arranged.

Referring to FIG. 5, the subpixels RP, WP, GP, and BP may be arranged in a second matrix array structure. The second matrix array structure may include a first subpixel array structure in which white subpixels (WP) are disposed between RGB subpixels. The RGB subpixels are a structure in which red subpixels RP, green subpixels GP, and blue subpixels BP are sequentially alternately arranged along the horizontal direction. The second matrix array structure is arranged such that one selected from red subpixels RP, green subpixels GP and blue subpixels BP is arranged between white subpixels WP along a vertical direction perpendicular to the horizontal direction Gt; subpixel < / RTI >

FIGS. 6 to 7 schematically show the arrangement structures of the pixels P1 and P2 of the liquid crystal display 1000 of FIG.

Referring to FIG. 6, the first pixel P1 and the second pixel P2 may be arranged in a third matrix array structure. The first pixel P1 is an RGB pixel in which the red subpixel RP, the green subpixel GP and the blue subpixel BP are alternately arranged in order and the second pixel P2 is a white pixel. By configuring a white pixel with a size corresponding to RGB pixels, the transmittance of light (Li in FIG. 1) can be improved. Only the first pixels P1 may be arranged in the horizontal direction in the first row and the third row and only the second pixels P2 in the second row and the fourth row may be arranged in the horizontal direction. In the longitudinal direction, a second pixel P2 may be disposed between the first pixels P1 and a first pixel P1 may be disposed between the second pixels P2.

Referring to FIG. 7, the first pixel P1 and the second pixel P2 may be arranged in a fourth matrix array structure. The first pixel P1 is an RGB pixel in which the red subpixel RP, the green subpixel GP and the blue subpixel BP are alternately arranged in order and the second pixel P2 is a white pixel. By configuring a white pixel with a size corresponding to RGB pixels, the transmittance of light (Li in FIG. 1) can be improved. In the first to fourth rows, a second pixel P2 may be disposed between the first pixels P1 and a first pixel P1 may be disposed between the second pixels P2. have. A second pixel P2 may be disposed between the first pixels P1 in the first to fourth columns and a first pixel P1 may be disposed between the second pixels P2. have.

4 through 7 illustrate exemplary subpixel array structures or pixel array structures, but not limited thereto, the arrangement of subpixels and the arrangement of pixels may be determined by the transmittance of externally incident light, It can be appropriately selected in consideration of the transmittance, color, resolution, etc. of light reflected on the polarizer and emitted to the outside.

8 is a schematic cross-sectional view of a liquid crystal display 1000-1 according to the second embodiment. 9 is an enlarged view of the area B in Fig.

The liquid crystal display 1000-1 differs from the liquid crystal display 1000 in that it includes a second conductive wire grid polarizer WGP2. The second conductive wire grid polarizer WGP2 may further include a first conductive layer (not shown) in that it further includes a reflection pattern RF that reflects both the S wave parallel to the first direction D1 and the P wave parallel to the first direction D2. And is different from the wire grid polarizer WGP1. That is, the reflection pattern RF can only serve as a reflector and does not have a polarization function.

The reflection pattern RF may have a width larger than that of the conductive partition walls CW and may transmit a P wave parallel to the second direction D2 between the reflection patterns RF, The conductive barrier ribs CW that reflect the S waves parallel to the X-axis direction can be spaced apart at a predetermined interval.

As described above, the conductive partition walls CW may be a laminated structure of the first layer WG1 and the second layer WG2. The reflection pattern RF may also be a laminated structure of the first layer and the second layer. The first layer may be composed of one of the first transition metal, the first transition metal, and the alloys thereof. For example, the first layer WG1 may be made of one of aluminum (Al), chrome (Cr), gold (Au), silver (Ag), copper (Cu), nickel (Ni) . The second layer is disposed on the first layer and can serve as a capping layer for preventing hillock that may occur at the interface with the first layer. The second layer may be composed of a material having an etching selectivity ratio higher than that of the first layer. For example, the second layer may be composed of a second transition metal different from the first transition metal, and the second transition metal may be, for example, titanium (Ti), cobalt (Co), molybdenum (Mo) Of the alloy. The reflection patterns RF are disposed to overlap with the white color filters W to improve the reflection efficiency of light incident on the liquid crystal layer 200 from the outside (Li in FIG. 1).

10 is a schematic cross-sectional view of a liquid crystal display 1000-2 according to the third embodiment. 11 is an enlarged view of the area C in Fig.

The liquid crystal display 1000-2 includes a color filter on array layer COA including the color filter CF and the first display substrate 100 not including the color filter layer CF and the second display substrate 300 including the color filter layer CF. ) Of the liquid crystal display device 1000. [

The liquid crystal display 1000-2 has no color filter layer CF between the first transmissive substrate US and the common electrode CE and a color filter layer CF between the first transmissive substrate US and the common electrode CE A black matrix BM and an overcoat layer OC exist. The overcoat layer OC is disposed on the black matrix BM and the first transmissive substrate US.

The color filter on array layer COA differs from the thin film transistor array layer (TFTA in FIG. 1) in that it includes a color filter layer between the thin film transistor (TFT) and the organic passivation film (OPL). Specifically, the color filter on-array layer (COA) further includes a color filter layer disposed on the inorganic passivation film IPL, and the color filter layer is disposed between the inorganic passivation film IPL and the organic passivation film OPL , A red color filter (R), a white color filter (W), a green color filter (G), and a white color filter (W) are alternately arranged. The structure of the thin film transistor (TFT) has been described with reference to FIG. 1, and a detailed description thereof will be omitted.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1000: liquid crystal display
100: first display substrate 200: liquid crystal layer
300: second display substrate WGP: conductive wire grid polarizer
WG: Conductive wire grid pattern CW: Conductive barrier
RF: reflection pattern
POL: Absorption type polarizer

Claims

Light source;
An upper transparent substrate;
A lower transparent substrate disposed between the light source and the upper transparent substrate;
A liquid crystal layer disposed between the upper transmissive substrate and the lower transmissive substrate;
Wherein the first polarized light is transmitted through the first polarized light and the second polarized light perpendicular to the first polarized light is reflected by the first polarized light and the second polarized light, A conductive wire grid polarizer including conductive wire grid patterns; And
A color filter layer including red color filters, green color filters, blue color filters, and white color filters, the color filter layer disposed between the liquid crystal layer and the upper transmissive substrate;
And the liquid crystal display device.

The method according to claim 1,
And an absorption type polarizing plate,
And the upper transmissive substrate is disposed between the absorption type polarizing plate and the liquid crystal layer.

3. The method of claim 2,
Wherein the absorption type polarizing plate comprises a polyvinyl alcohol (PVA) polarizing film in which iodine is dyed.

The method according to claim 1,
Wherein the conductive wire grid polarizer further comprises reflection patterns disposed between the conductive wire grid patterns in an image display area to reflect both the first polarized light and the second polarized light.

5. The method of claim 4,
And the reflection patterns are arranged to overlap with the white color filters.

The method according to claim 1,
Wherein the white subpixel includes a subpixel array structure in which a white subpixel is disposed between two subpixels selected from red subpixels, green subpixels, and blue subpixels.

The method according to claim 1,
A first subpixel array structure in which first white subpixels are arranged between RGB subpixels in which first red subpixels, second green subpixels, and third blue subpixels are alternately arranged along a first direction Liquid crystal display device.

8. The method of claim 7,
Pixel array structure in which one of a first red subpixel, a second red subpixel, a second green subpixel, and a second blue subpixel is disposed between second white subpixels along a second direction perpendicular to the first direction .

The method according to claim 1,
And a pixel array structure in which white pixels are arranged between RGB pixels in which red subpixels, green subpixels, and blue subpixels are alternately arranged.

The method according to claim 1,
A first pixel array structure in which RGB pixels in which red, green, and blue subpixels are arranged alternately along a first direction and a second pixel array structure in which RGB pixels in a second direction perpendicular to the first direction are alternately arranged, And a second pixel array structure in which white pixels are arranged between the first pixel array structure and the second pixel array structure.

Light source;
An upper transparent substrate;
A lower transparent substrate disposed between the light source and the upper transparent substrate;
A liquid crystal layer disposed between the upper transmissive substrate and the lower transmissive substrate;
Wherein the first polarized light is transmitted through the first polarized light and the second polarized light perpendicular to the first polarized light is reflected by the first polarized light and the second polarized light, A conductive wire grid polarizer including a conductive wire grid pattern; And
A color filter layer including red color filters, green color filters, blue color filters, and white color filters, the color filter layer disposed between the liquid crystal layer and the conductive wire grid polarizer;
And the liquid crystal display device.

12. The method of claim 11,
And an absorption type polarizing plate,
And the upper transmissive substrate is disposed between the absorption type polarizing plate and the liquid crystal layer.

13. The method of claim 12,
Wherein the absorption type polarizing plate comprises a polyvinyl alcohol (PVA) polarizer in which iodine is dyed.

12. The method of claim 11,
Wherein the conductive wire grid polarizer further comprises reflection patterns disposed between the conductive wire patterns in an image display area to reflect both the first polarized light and the second polarized light.

15. The method of claim 14,
And the reflection patterns are arranged to overlap with the white color filters.

12. The method of claim 11,
Wherein the white subpixel includes a subpixel array structure in which a white subpixel is disposed between two subpixels selected from red subpixels, green subpixels, and blue subpixels.

12. The method of claim 11,
A first subpixel array structure in which first white subpixels are arranged between RGB subpixels in which first red subpixels, second green subpixels, and third blue subpixels are alternately arranged along a first direction Liquid crystal display device.

18. The method of claim 17,
Pixel array structure in which one of a first red subpixel, a second red subpixel, a second green subpixel, and a second blue subpixel is disposed between second white subpixels along a second direction perpendicular to the first direction .

12. The method of claim 11,
And a pixel array structure in which white pixels are arranged between RGB pixels in which red subpixels, green subpixels, and blue subpixels are alternately arranged.

12. The method of claim 11,
A first pixel array structure in which RGB pixels in which red, green, and blue subpixels are arranged alternately along a first direction and a second pixel array structure in which RGB pixels in a second direction perpendicular to the first direction are alternately arranged, And a second pixel array structure in which white pixels are arranged between the first pixel array structure and the second pixel array structure.