Liquid crystal display device

Abstract

The utility model discloses a liquid crystal display device which comprises a display unit. The compensation unit is arranged on the light emitting side of the display unit, the compensation unit comprises a liquid crystal structure layer and a second array substrate, the liquid crystal structure layer is arranged on the color film substrate, and the second array substrate is arranged on the side, away from the display unit, of the liquid crystal structure layer; the liquid crystal structure layer comprises second liquid crystal, the in-plane optical path difference compensation value of the second liquid crystal is R0 second liquid crystal, the range of the R0 second liquid crystal is 137nm < = R0 second liquid crystal < = 139nm, the optical path difference compensation value of the second liquid crystal in the thickness direction is Rth second liquid crystal, and the range of the Rth second liquid crystal is 68nm < = Rth second liquid crystal < = 70nm; the compensation polaroid is arranged on one side, far away from the display unit, of the compensation unit; and color cast of the liquid crystal display device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field more particularly, relate to a liquid crystal display device. BACKGROUND

[0002] Liquid Crystal Display (LCD) has the characteristics of small volume, low power consumption, no radiation, etc., and has been rapidly developed. The liquid crystal display panel includes a thin film transistor array (TFT) substrate and a color filter (CF) substrate of a cell (CELL), and liquid crystal (LC) molecules are arranged between the array substrate and the color filter substrate. By controlling the common electrode and the pixel electrode, an electric field for driving the liquid crystal to deflect is formed, and gray scale display is realized.

[0003] The liquid crystal in the liquid crystal layer of the liquid crystal display device has birefringence properties, that is, the refractive index of light is different in different directions. When light passes through the liquid crystal layer, the direction of the liquid crystal arrangement will affect the propagation speed of the light, resulting in the generation of phase difference. Under the condition of large viewing angle in dark state (such as L0 brightness), this phase difference causes the liquid crystal display device to leak light, the display picture color is offset, and the contrast is reduced. SUMMARY

[0004] The utility model embodiment provides a kind of liquid crystal display device, reduce the color offset of liquid crystal display device.

[0005] The utility model embodiment provides a kind of liquid crystal display device, comprising:

[0006] The display unit includes a first array substrate and a color filter substrate, and a first liquid crystal layer disposed between the first array substrate and the color filter substrate. The first liquid crystal layer includes a first liquid crystal.

[0007] The compensation unit is disposed on the light exit side of the display unit. The compensation unit includes a liquid crystal structure layer and a second array substrate. The liquid crystal structure layer is disposed on the color filter substrate, and the second array substrate is disposed on the side of the liquid crystal structure layer away from the display unit. The liquid crystal structure layer includes a second liquid crystal. The in-plane optical path difference compensation value of the second liquid crystal is R 0第二液晶 , and the range of R 0第二液晶 is 137nm≤R 0第二液晶 ≤139nm. The thickness direction optical path difference compensation value of the second liquid crystal is R th第二液晶 , and the range of R th第二液晶 is 68nm≤R th第二液晶 ≤70nm.

[0008] A compensation polarizer is disposed on the side of the compensation unit away from the display unit.

[0009] In an example embodiment, the in-plane slow axis direction of the second liquid crystal has a refractive index N x , the in-plane fast axis direction of the second liquid crystal has a refractive index N y , and the thickness direction of the second liquid crystal has a refractive index N z , wherein the N x , the N y , and the N z satisfy the following relationship: N x <N y =N z , N z =1.

[0010] In an example embodiment, the liquid crystal structure layer includes a second liquid crystal layer including the second liquid crystal; or the liquid crystal structure layer includes a first sub-liquid crystal layer and a second sub-liquid crystal layer disposed in sequence away from the display unit, and both the first sub-liquid crystal layer and the second sub-liquid crystal layer include the second liquid crystal.

[0011] In an example embodiment, the in-plane optical path difference compensation value of the first liquid crystal is R 0第一液晶 , the R 0第一液晶 is in the range of 300nm≤R 0第一液晶 ≤370nm, the thickness direction optical path difference compensation value of the first liquid crystal is R th第一液晶 , and the R th第一液晶 is in the range of 170nm≤R th第一液晶 ≤185nm.

[0012] In an example embodiment, the thickness direction optical path difference compensation value of the color filter substrate is R th彩膜 , and the R th彩膜 is in the range of 1.7≤R th彩膜 ≤3.2nm.

[0013] In an example embodiment, the compensation polarizer includes a first protective layer, a compensation layer, a polarizing layer, and a second protective layer disposed in sequence away from the display unit, and the compensation layer includes at least one uniaxial compensation film layer.

[0014] In an example embodiment, the compensation layer includes one uniaxial compensation film layer, the uniaxial compensation film layer is a +C film layer, the in-plane optical path difference compensation value of the compensation layer is R 0补偿层 , the R 0补偿层 is in the range of R 0补偿层 =0, and the thickness direction optical path difference compensation value of the compensation layer is R th补偿层 , and the Rth补偿层 The range is: -52nm≤R th补偿层 ≤-63nm.

[0015] In an exemplary embodiment, the compensation layer includes a first uniaxial compensation film layer and a second uniaxial compensation film layer. The first uniaxial compensation film layer is disposed on the side of the second uniaxial compensation film layer close to the display unit. The first uniaxial compensation film layer is a +A film layer and the second uniaxial compensation film layer is a +C film layer; or, the first uniaxial compensation film layer is a -C film layer and the second uniaxial compensation film layer is a +B film layer.

[0016] In an exemplary embodiment, the compensation layer includes a first single-axis compensation film layer, a second single-axis compensation film layer, a third single-axis compensation film layer, and a fourth single-axis compensation film layer arranged sequentially along a direction away from the display unit. The first single-axis compensation film layer is a +A film layer, the second single-axis compensation film layer is a +C film layer, the third single-axis compensation film layer is a -C film layer, and the fourth single-axis compensation film layer is a +B film layer.

[0017] In an exemplary embodiment, the compensating polarizer includes a first protective layer, a polarizing layer, and a second protective layer arranged sequentially along a direction away from the display unit. The polarizing layer contains haze particles, and the haze value of the haze particles is greater than or equal to 40% and less than or equal to 55%.

[0018] The liquid crystal display device in this embodiment controls the in-plane optical path difference compensation value R of the second liquid crystal in the compensation unit. 0第二液晶 The range is: 137nm≤R 0第二液晶 ≤139nm, and the thickness direction optical path difference compensation value R of the second liquid crystal. th第二液晶 The range is: 68nm≤R th第二液晶 ≤70nm, without applying voltage, compensates for the phase difference of light of the corresponding wavelength (e.g., green light), thereby reducing the color shift of dark (e.g., L0 brightness) images at large viewing angles.

[0019] According to the embodiments of the present disclosure, the liquid crystal display device controls the voltage of the liquid crystal structure layer in the crystal compensation unit to adjust the rotation angle of the second liquid crystal in the compensation unit based on the color shift (e.g., reddish, bluish, or purplish) at a large viewing angle in the dark state (e.g., L0 brightness) of the liquid crystal display device, thereby changing the in-plane optical path difference compensation value R of the second liquid crystal. 0第二液晶 And the optical path difference compensation value R in the thickness direction of the second liquid crystal. th第二液晶 This compensates for the phase difference of corresponding wavelengths of light (such as red, green or blue light) and reduces color shift in wide-view images in dark states (such as L0 brightness).

[0020] The liquid crystal display device of the embodiment of the present disclosure makes the polarization direction of the light incident on the compensation polarizer parallel to the absorption axis of the compensation polarizer by compensating the compensation layer of the compensation polarizer and cooperating with the compensation unit, so that the light incident on the compensation polarizer is completely absorbed, and the color cast of the large-view-angle picture in the dark state (for example, L0 brightness) is reduced.

[0021] The liquid crystal display device of the embodiment of the present disclosure reduces the specular reflection of the liquid crystal display device by scattering the incident light by arranging the haze particles in the compensation layer, thereby reducing the glare.

[0022] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application, and do not limit the present application.

[0024] Figure 1 FIG. 1 is a plan structure schematic diagram of a liquid crystal display device according to an embodiment of the present disclosure;

[0025] Figure 2 FIG. 2 is a cross-sectional structure schematic diagram of a liquid crystal display device according to an embodiment of the present disclosure;

[0026] Figure 3 FIG. 3 is a cross-sectional structure schematic diagram of a second compensation polarizer of a liquid crystal display device according to an embodiment of the present disclosure;

[0027] Figure 4 FIG. 4 is a Poincare sphere schematic diagram of a liquid crystal display device according to an embodiment of the present disclosure;

[0028] Figure 5 FIG. 5 is a cross-sectional structure schematic diagram of another liquid crystal display device according to an embodiment of the present disclosure;

[0029] Figure 6 FIG. 6 is a cross-sectional structure schematic diagram of a second compensation polarizer of another liquid crystal display device according to an embodiment of the present disclosure;

[0030] Figure 7 FIG. 7 is a cross-sectional structure schematic diagram of a second compensation polarizer of another liquid crystal display device according to an embodiment of the present disclosure;

[0031] Figure 8 FIG. 8 is a cross-sectional structure schematic diagram of another liquid crystal display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the following will combine the drawings to make a detailed description of the embodiments of the utility model. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other at will without conflict.

[0033] Figure 1 A schematic diagram of a planar structure of a liquid crystal display device is provided in an embodiment of the present disclosure. In an exemplary embodiment, as shown in Figure 1 the liquid crystal display device can include a plurality of pixel units P arranged in a matrix manner, at least one pixel unit P including a plurality of sub-pixels, and the plurality of sub-pixels can include a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light.

[0034] In an exemplary embodiment, the first sub-pixel P1 can be a red sub-pixel emitting red (R) light, the second sub-pixel P2 can be a green sub-pixel emitting green (G) light, and the third sub-pixel P3 can be a blue sub-pixel emitting blue (B) light. The shape of the sub-pixels in the pixel unit can be rectangular, diamond, pentagonal, or hexagonal, and the sub-pixels in the pixel unit can be arranged in a horizontal parallel, vertical parallel, or triangular manner, which is not limited in the present disclosure. In an exemplary embodiment, the pixel unit can include four sub-pixels, which is not limited in the present disclosure.

[0035] Figure 2 A schematic diagram of a cross-sectional structure of a liquid crystal display device is provided in an embodiment of the present disclosure. In an exemplary embodiment, as shown in Figure 2 the liquid crystal display device can include a display unit 10, a compensation unit 30, a first polarizer 21, and a second polarizer 22. The display unit 10 is configured to transmit or block incident light, and the display unit 10 has an outlight side and a backlight side arranged opposite in a third direction D3. The outlight side of the display unit 10 is the side where the display unit 10 transmits light, and the backlight side of the display unit 10 is the side where the display unit 10 faces away from the outlight side of the display unit 10. The first polarizer 21 is arranged on the backlight side of the display unit 10, and the first polarizer 21 is configured to form polarized light from incident light (such as backlight), and to emit the polarized light towards the display unit 10. The second polarizer 22 is arranged on the outlight side of the display unit 10, and the second polarizer 22 is configured to absorb or transmit incident polarized light. The compensation unit 30 is arranged between the second polarizer 22 and the outlight side of the display unit 10, and the compensation unit 30 is configured to compensate for the phase difference of specific wavelength light (such as red light, green light, or blue light) transmitted by the display unit 10, thereby reducing the color deviation of the large-view picture in the dark state (such as L0 brightness).

[0036] The liquid crystal display device according to the embodiments of the present disclosure controls the voltage of the liquid crystal structure layer in the compensation unit, adjusts the rotation angle of the second liquid crystal in the compensation unit, and changes the in-plane optical path difference compensation value R of the second liquid crystal, so as to compensate the phase difference of the corresponding wavelength light (e.g., red light, green light or blue light) and reduce the color deviation of the picture at a large viewing angle in the dark state (e.g., L0 luminance). 0第二液晶 and the thickness direction optical path difference compensation value R of the second liquid crystal th第二液晶 , so as to compensate the phase difference of the corresponding wavelength light (e.g., red light, green light or blue light) and reduce the color deviation of the picture at a large viewing angle in the dark state (e.g., L0 luminance).

[0037] In the example embodiment, when the picture of the liquid crystal display device at a large viewing angle in the dark state (e.g., L0 luminance) is red, the voltage of the compensation unit 30 is increased, so that the compensation unit 30 compensates the red light; when the picture of the liquid crystal display device at a large viewing angle in the dark state (e.g., L0 luminance) is blue, the voltage of the compensation unit 30 is decreased, so that the compensation unit 30 compensates the blue light; and in other states, the liquid crystal in the compensation unit 30 can be controlled to be completely deflected, so that the picture of the liquid crystal display device reaches the optimal light effect.

[0038] In the example embodiment, the display unit 10 includes a first array substrate 11 and a color filter substrate 12 arranged oppositely, and a first liquid crystal layer 13 arranged between the first array substrate 11 and the color filter substrate 12. The first array substrate 11 can include a first structure layer arranged on the side of the first substrate facing the color filter substrate 12, and the color filter substrate 12 can include a second structure layer arranged on the side of the second substrate facing the first array substrate 11.

[0039] In the example embodiment, the first array substrate 11 can be a display array substrate, and the first structure layer of the first array substrate 11 can include a first driving circuit connected with the first liquid crystal layer 13, for providing a voltage to the first liquid crystal layer 13 and controlling the rotation angle of the liquid crystal in the first liquid crystal layer 13. The first driving circuit can include a gate line, a data line, a thin film transistor, a pixel electrode and a common electrode. The second structure layer of the color filter substrate 12 can include a black matrix and a filter pattern. The first liquid crystal layer 13 can be a display liquid crystal layer, and the first liquid crystal layer 13 can include a plurality of first liquid crystals with dielectric anisotropy. The first liquid crystals of the first liquid crystal layer 13 can rotate in a predetermined direction between the display array substrate and the color filter substrate by an electric field applied between the display array substrate and the color filter substrate.

[0040] In the example embodiment, the in-plane optical path difference compensation value R 0第一液晶 of the first liquid crystal in the first liquid crystal layer 13 ranges from 300 nm to 370 nm, and the thickness direction optical path difference compensation value R 0第一液晶 of the first liquid crystal in the first liquid crystal layer 13 ranges from 300 nm to 370 nm. th第一液晶Rthick ≤ 185 nm. The thickness-direction optical path difference compensation value Rthick of the color filter substrate 12 is in the range: 170 nm ≤ Rthick ≤ 185 nm. th第一液晶 Rthick ≤ 185 nm. The thickness-direction optical path difference compensation value Rthick of the color filter substrate 12 is in the range: 170 nm ≤ Rthick ≤ 185 nm. th彩膜 Rthick ≤ 185 nm. The thickness-direction optical path difference compensation value Rthick of the color filter substrate 12 is in the range: 170 nm ≤ Rthick ≤ 185 nm. th彩膜 Rthick ≤ 185 nm. The thickness-direction optical path difference compensation value Rthick of the color filter substrate 12 is in the range: 170 nm ≤ Rthick ≤ 185 nm.

[0041] In the example embodiment, the display unit 10 further includes a first alignment film and a second alignment film, the material of the first alignment film and the second alignment film is polyimide (PI), the first alignment film is arranged between the first array substrate 11 and the first liquid crystal layer 13, and the second alignment film is arranged between the color filter substrate 12 and the first liquid crystal layer 13, and the first alignment film and the second alignment film are configured to control the arrangement direction of the liquid crystal in the first liquid crystal layer 13.

[0042] In the example embodiment, the compensation unit 30 can include an adhesive layer 31, a second liquid crystal layer 32, a third alignment film 33 and a second array substrate 34 which are sequentially stacked away from the display unit 10. The second array substrate 34 can serve as a compensation array substrate, and the second array substrate 34 can include a third structure layer arranged on the side of the first base facing the color filter substrate 12, the third structure layer can include a second driving circuit, the second driving circuit can be connected with the second liquid crystal layer 32, and used to provide a voltage to the second liquid crystal layer 32 to control the rotation angle of the liquid crystal in the second liquid crystal layer 32; the second driving circuit can include a gate line, a data line, a thin film transistor, a pixel electrode and a common electrode. The second liquid crystal layer 32 serves as a liquid crystal structure layer of the compensation unit 30.

[0043] In the example embodiment, the third alignment film 33 is arranged between the second array substrate 34 and the second liquid crystal layer 32, and the third alignment film 33 is configured to control the arrangement direction of the liquid crystal in the second liquid crystal layer 32. The material of the third alignment film 33 can be polyimide (PI). The orientation of the third alignment film 33 is the same as that of the alignment film of the display unit 10.

[0044] In the example embodiment, the second liquid crystal layer 32 is arranged between the third alignment film 33 and the adhesive layer 31, and the second liquid crystal layer 32 can include a plurality of second liquid crystals having dielectric anisotropy. The second liquid crystals in the second liquid crystal layer 32 can be rotated in a predetermined direction between the second array substrate 34 and the color filter substrate 12 by the voltage applied by the second array substrate 34. The second liquid crystal layer 32 is configured to compensate the phase difference of specific wavelength light (such as red light, green light or blue light) transmitted by the display unit 10. The second liquid crystal layer 32 can be a nematic liquid crystal, and the second liquid crystals in the second liquid crystal layer 32 can be positive liquid crystals.

[0045] In the example embodiment, the in-plane optical path difference compensation value R 0第二液晶 of the second liquid crystals in the second liquid crystal layer 32 is in the range: 137 nm ≤ Rthick ≤ 185 nm.0第二液晶 ≤ 139 nm. The thickness-direction optical path difference compensation value R th第二液晶 of the second liquid crystal in the second liquid crystal layer 32 is in the range of: 68 nm ≤ R th第二液晶 ≤ 70 nm. The in-film-plane slow-axis-direction refractive index N x , the in-film-plane fast-axis-direction refractive index N y , and the film-thickness-direction refractive index N z of the second liquid crystal in the second liquid crystal layer 32 satisfy the following relationship: N x < N y = N z . Wherein, N z = 1.

[0046] The liquid crystal display device of the embodiments of the present disclosure controls the in-film-plane optical path difference compensation value R 0第二液晶 of the second liquid crystal of the compensation unit to be in the range of: 137 nm ≤ R 0第二液晶 ≤ 139 nm, and controls the thickness-direction optical path difference compensation value R th第二液晶 of the second liquid crystal to be in the range of: 68 nm ≤ R th第二液晶 ≤ 70 nm, so as to compensate the phase difference of the corresponding wavelength light (for example, green light) in the state without voltage, thereby reducing the color cast of the large-viewing-angle picture in the dark state (for example, L0 luminance).

[0047] In the exemplary embodiments, the adhesive layer 31 is arranged between the second liquid crystal layer 32 and the color filter substrate 12, and the adhesive layer 31 is configured to bond the second liquid crystal layer 32 and the color filter substrate 12. Wherein, the material of the adhesive layer 31 can adopt an optically clear adhesive (Optically Clear Adhesive).

[0048] Figure 3 FIG. 1 is a schematic view of the cross section structure of a second polarizer of a liquid crystal display device according to an embodiment of the present disclosure. In the exemplary embodiments, as shown in FIG. 1, the liquid crystal display device comprises a first polarizer 11, a second polarizer 12, a first liquid crystal layer 21, a compensation unit 30, and a second liquid crystal layer 32. Figure 2 and Figure 3As shown, the second polarizer 22 is arranged on the side of the compensation unit 30 away from the display unit 10, and the second polarizer 22 can include, in sequence from the side away from the display unit 10, a release film 221, a first protective layer 222, a compensation layer 223, a polarizing layer 224, a second protective layer 225, a surface treatment layer 226, and a protective film 227. The release film 221 is used to protect the polarizer and prevent the polarizer from adhering; the first protective layer 222 and the second protective layer 225 are used to protect the polarizer and prevent damage to the polarizer from the external environment; the compensation layer 223 is configured to compensate for the phase difference of incident light; the polarizing layer 224 is configured to transmit incident light whose polarization direction is parallel to its transmission axis and absorb incident light whose polarization direction is parallel to its absorption axis; the surface treatment layer 226 is used to reduce reflected light and improve the display effect of the liquid crystal display device; and the protective film 227 is used to protect the polarizer and improve the heat resistance and ultraviolet resistance of the polarizer. The second polarizer 22 can serve as a compensation polarizer, and the second polarizer 22 can be configured to compensate for the phase difference of incident light.

[0049] In an example embodiment, the first protective layer 222 and the second protective layer 225 can each be made of a Triacetate Cellulose Film (TAC) film. The polarizing layer 224 can be made of a Polyvinyl Alcohol (PVA) film.

[0050] In an example embodiment, the compensation layer 223 can include a single-axis compensation film layer, which is a +C film layer. The in-plane retardation compensation value R 0补偿层 of the compensation layer 223 ranges from: R 0补偿层 = 0; and the thickness-direction retardation compensation value R th补偿层 of the compensation layer 223 ranges from: -52 nm ≤ R th补偿层 ≤ -63 nm.

[0051] The liquid crystal display device of the present disclosure compensates for the compensation layer 223 of the polarizer, cooperates with the compensation unit 30, and makes the polarization direction of the light incident on the polarizing layer 224 of the compensation polarizer parallel to the absorption axis of the polarizing layer 224, so that the light incident on the polarizing layer 224 is completely absorbed, reducing the color shift of the large-viewing-angle picture in the dark state (e.g., L0 luminance).

[0052] Figure 4 FIG. 1 is a Poincare sphere diagram of a liquid crystal display device according to an example embodiment of the present disclosure. In an example embodiment, as shown in FIG. 1, the display unit 10 can include a first polarizer 20 and a second polarizer 21, and the compensation unit 30 can include a first compensation unit 31 and a second compensation unit 32. Figure 4As shown, the emitted light of the display unit 10 of the liquid crystal display device of the embodiment of the present disclosure successively passes through the compensation of the compensation unit 30 and the compensation layer 223 of the second polarizer 22, and the polarization state of the light is changed from O polarization state to P polarization state, so that the emitted light of the P polarization state is completely absorbed by the polarizing layer of the second polarizer 22, thereby realizing compensation of the dark state (for example, L0 brightness) at a large viewing angle. Wherein, the O polarization state is the polarization state of the emitted light of the display unit 10, and the P polarization state is the polarization state of the emitted light of the compensation layer 223. The polarization direction of the emitted light of the P polarization state is parallel to the absorption axis of the polarizing layer of the second polarizer 22, so that the P polarization state light can be completely absorbed by the polarizing layer of the second polarizer 22, avoiding light leakage.

[0053] Figure 5 FIG. 6 is a schematic diagram of a cross-sectional structure of another liquid crystal display device according to an embodiment of the present disclosure. In an exemplary embodiment, as shown in FIG. 6, the structure of the liquid crystal display device of the embodiment of the present disclosure is basically the same as the structure of the liquid crystal display device shown in FIG. 1, except that the structure of the compensation unit 30 of the liquid crystal display device of the embodiment of the present disclosure is different. Figure 5 Figure 2

[0054] In an exemplary embodiment, the compensation unit 30 can include a first adhesive layer 311, a first sub liquid crystal layer 321, a second adhesive layer 312, a second sub liquid crystal layer 322, a third alignment film 33 and a second array substrate 34 which are sequentially stacked away from the display unit 10. The first sub liquid crystal layer 321 and the second sub liquid crystal layer 322 each include a second liquid crystal, and the first sub liquid crystal layer 321 and the second sub liquid crystal layer 322 in combination constitute a liquid crystal structure layer of the compensation unit 30.

[0055] Figure 6 FIG. 7 is a schematic diagram of a cross-sectional structure of a second polarizer of another liquid crystal display device according to an embodiment of the present disclosure. In an exemplary embodiment, as shown in FIG. 7, the structure of the liquid crystal display device of the embodiment of the present disclosure is basically the same as the structure of the liquid crystal display device shown in FIG. 1, except that the second polarizer 22 of the liquid crystal display device of the embodiment of the present disclosure is different. Figure 6 Figure 2

[0056] In an exemplary embodiment, the second polarizer 22 can include a release film 221, a first protective layer 222, a polarizing layer 224, a second protective layer 225, a surface treatment layer 226 and a protective film 227 which are sequentially stacked away from the display unit 10. Wherein, the polarizing layer 224 is provided with haze particles 40, and at least part of the haze particles 40 are dispersed in the polarizing layer 224. The haze particles 40 are configured to scatter incident light, reduce specular reflection of the liquid crystal display device, and thereby reduce glare.

[0057] ​​​​In an exemplary embodiment, the haze value of the haze particles 40 is greater than or equal to 40% and less than or equal to 55%.

[0058] In an exemplary embodiment, the compensation layer 223 of the second polarizer 22 can include a first uniaxial compensation film layer and a second uniaxial compensation film layer, the first uniaxial compensation film layer is disposed on the side of the second uniaxial compensation film layer close to the display unit 10. Wherein, the first uniaxial compensation film layer can be a +A film layer, and the second uniaxial compensation film layer can be a +C film layer; or, the first uniaxial compensation film layer can be a -C film layer, and the second uniaxial compensation film layer can be a +B film layer.

[0059] In an exemplary embodiment, the in-plane retardation compensation value R 0+A膜层 of the +A film layer is in the range of 119nm≤R 0+A膜层 ≤129nm, and the thickness direction retardation compensation value R th+A膜层 of the +A film layer is in the range of 57nm≤R th+A膜层 ≤67nm. The in-plane retardation compensation value R 0+C膜层 of the +C film layer is in the range of R 0+C膜层 =0nm, and the thickness direction retardation compensation value R th+C膜层 of the +C film layer is in the range of -73nm≤R th+C膜层 ≤-83nm. The in-plane retardation compensation value R 0-C膜层 of the -C film layer is in the range of 0nm≤R 0-C膜层 ≤1.1nm, and the thickness direction retardation compensation value R th-C膜层 of the -C film layer is in the range of 105nm≤R th-C膜层 ≤116nm. The in-plane retardation compensation value R 0+B膜层 of the +B film layer is in the range of 110nm≤R 0+B膜层 ≤120nm, and the thickness direction retardation compensation value R th+B膜层 of the +B film layer is in the range of -110nm≤R th+B膜层 ≤-120nm.

[0060] The liquid crystal display device of the present embodiment can reduce the color cast of the large-viewing-angle picture in dark state (e.g. L0 luminance) by the haze particles 40 in the compensation layer 223 and the polarizing layer 224 of the second polarizer, for example, reduce the picture bluish purple.

[0061] Figure 7 FIG. 6 is a schematic view of the cross-sectional structure of the second polarizer of another liquid crystal display device of the present embodiment. In an exemplary embodiment, as shown in FIG. 6, the structure of the liquid crystal display device of the present embodiment is the same as that of the liquid crystal display device of the present embodiment shown in FIG. 1. Figure 7 Figure 2 ​The structures of the liquid crystal display devices shown are basically the same, except that the second polarizer 22 of the liquid crystal display device of the present embodiment is different.

[0062] In an exemplary embodiment, the second polarizer 22 is disposed on the side of the compensation unit 30 away from the display unit 10, and the second polarizer 22 can include, in order from the side away from the display unit 10, a release film 221, a first protective layer 222, a compensation layer 223, a polarizing layer 224, a second protective layer 225, a surface treatment layer 226, and a protective film 227. The compensation layer 223 includes, in order from the side away from the display unit 10, a first uniaxial compensation film layer 2231, a second uniaxial compensation film layer 2232, a third uniaxial compensation film layer 2233, and a fourth uniaxial compensation film layer 2234, the first uniaxial compensation film layer 2231 can be a +A film layer, the second uniaxial compensation film layer 2232 can be a +C film layer, the third uniaxial compensation film layer 2233 can be a -C film layer, and the fourth uniaxial compensation film layer 2234 can be a +B film layer.

[0063] The liquid crystal display device of the present embodiment can reduce color deviation of a large-viewing-angle picture in a dark state (e.g., L0 luminance) through the compensation layer 223, for example, to reduce picture bluish purple.

[0064] Figure 8 A cross-sectional structure schematic diagram of another liquid crystal display device of the present embodiment is shown. In an exemplary embodiment, as shown in Figure 8 The liquid crystal display device of the present embodiment includes a display unit 10, a first polarizer 21, and a second polarizer 22. The first polarizer 21 is disposed on the backlight side of the display unit 10, and the first polarizer 21 is configured to form polarized light from incident light and to emit the polarized light toward the display unit 10. The second polarizer 22 is disposed on the light-emitting side of the display unit 10, and the second polarizer 22 is configured to absorb or transmit incident polarized light. The second polarizer 22 can be a compensation polarizer.

[0065] In an exemplary embodiment, the structure of the second polarizer 22 of the liquid crystal display device of the present embodiment can be substantially the same as the structure of the second polarizer shown in Figure 6 or Figure 7 The present embodiment will not be described here.

[0066] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "periphery", "mouth" structure" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the structure indicated has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0067] In the description of the utility model embodiment, unless otherwise explicitly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; the terms "installation", "connection", "fixed connection" can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0068] Although the embodiments disclosed by the utility model are as above, the content described is only the embodiment adopted for the convenience of understanding the utility model, and is not used to limit the utility model. Any person skilled in the art of the utility model can make any modification and change in the implementation form and details without departing from the spirit and scope of the utility model disclosed, but the patent protection scope of the utility model still needs to be defined by the appended claims.

Claims

1. A liquid crystal display device, characterized by comprising: The compensation unit comprises a liquid crystal structure layer and a compensation polarizer. The liquid crystal structure layer comprises a second liquid crystal layer, the second liquid crystal layer comprising the second liquid crystal; or the liquid crystal structure layer comprises a first sub-liquid crystal layer and a second sub-liquid crystal layer arranged in sequence away from the display unit, the first sub-liquid crystal layer and the second sub-liquid crystal layer both comprising the second liquid crystal. The compensation unit is arranged on the light-out side of the display unit, and comprises a liquid crystal structure layer and a second array substrate, the liquid crystal structure layer is arranged on the color film substrate, and the second array substrate is arranged on the side of the liquid crystal structure layer away from the display unit; the liquid crystal structure layer comprises a second liquid crystal, the in-plane optical path difference compensation value of the second liquid crystal is R 0第二液晶 , and the range of R 0第二液晶 is 137nm≤R 0第二液晶 ≤139nm, and the thickness direction optical path difference compensation value of the second liquid crystal is R th第二液晶 , and the range of R th第二液晶 is 68nm≤R th第二液晶 ≤70nm. The compensation polarizer comprises a first protective layer, a compensation layer, a polarizing layer and a second protective layer arranged in sequence away from the display unit, the compensation layer comprising at least one uniaxial compensation film layer.

2. The liquid crystal display device according to claim 1, wherein: The in-plane slow axis direction of the second liquid crystal has a refractive index of N x The in-plane fast axis direction of the second liquid crystal has a refractive index of N y The film thickness direction of the second liquid crystal has a refractive index of N z Wherein, the N x The N y The N z Satisfy the following relationship: N x N y =N z N z =1.

3. The liquid crystal display device according to claim 1, wherein: The compensation layer comprises a first uniaxial compensation film layer and a second uniaxial compensation film layer, the first uniaxial compensation film layer being arranged on the side of the second uniaxial compensation film layer close to the display unit, the first uniaxial compensation film layer being a +A film layer, and the second uniaxial compensation film layer being a +C film layer; or the first uniaxial compensation film layer is a -C film layer, and the second uniaxial compensation film layer is a +B film layer.

4. The liquid crystal display device according to any one of claims 1 to 3, wherein: The in-plane optical path difference compensation value of the first liquid crystal is R 0第一液晶 , and the range of R 0第一液晶 is 300nm≤R 0第一液晶 ≤370nm. The thickness direction optical path difference compensation value of the first liquid crystal is R th第一液晶 , and the range of R th第一液晶 is 170nm≤R th第一液晶 ≤185nm.

5. The liquid crystal display device according to any one of claims 1 to 3, wherein: The thickness direction optical path difference compensation value of the color filter substrate is R th彩膜 , and the range of R th彩膜 is 1.7≤R th彩膜 ≤3.2nm.

6. The liquid crystal display device according to any one of claims 1 to 3, wherein: The compensation layer comprises a first uniaxial compensation film layer, a second uniaxial compensation film layer, a third uniaxial compensation film layer and a fourth uniaxial compensation film layer arranged in sequence away from the display unit, the first uniaxial compensation film layer being a +A film layer, the second uniaxial compensation film layer being a +C film layer, the third uniaxial compensation film layer being a -C film layer, and the fourth uniaxial compensation film layer being a +B film layer.

7. The liquid crystal display device according to claim 6, wherein: The compensation layer includes a uniaxial compensation film layer, which is a +C film layer, and the in-plane optical path difference compensation value of the compensation layer is R. 0补偿层 The R 0补偿层 The range is: R 0补偿层 =0, the optical path difference compensation value in the thickness direction of the compensation layer is R th补偿层 The R th补偿层 The range is: -52nm≤R th补偿层 ≤-63nm.

8. The liquid crystal display device according to claim 6, wherein: ​ 9. The liquid crystal display device according to claim 6, wherein: ​

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