Compensation film, polaroid, liquid crystal display panel and display device

Abstract

The invention discloses a compensation film, a polaroid, a liquid crystal display panel and a display device, and relates to the technical field of display. The compensation film comprises a plurality of compensation units, each compensation unit comprises multiple types of compensation patterns, the compensation patterns of the same type are used for conducting phase compensation on incident light of the same color, and the compensation patterns of different types are used for conducting phase compensation on incident light of different colors, the at least two types of compensation patterns have different thicknesses and / or biaxial refractive index differences.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a compensation film, a polarizing film, a liquid crystal display panel and a display device. Background Art

[0002] With the advancement of science and technology and the continuous improvement of human living standards, the market's performance requirements for display screens are increasing, especially the demand for high-performance products such as high resolution, high refresh rate, and high contrast, and the demand for picture quality is also getting higher and higher. Summary of the invention

[0003] The present disclosure provides a compensation film, comprising a plurality of compensation units, wherein the compensation units include a plurality of types of compensation patterns, wherein the same type of compensation patterns are used to perform phase compensation on incident light of the same color, and different types of compensation patterns are used to perform phase compensation on incident light of different colors, wherein at least two types of compensation patterns have different thicknesses and / or biaxial refractive index differences.

[0004] In some embodiments, the at least two types of compensation patterns include:

[0005] A first compensation pattern, used for performing phase compensation on the first color light; and

[0006] A second compensation pattern, used for performing phase compensation on the second color light;

[0007] The ratio of the phase compensation value of the first compensation pattern for the first color light to the phase compensation value of the second compensation pattern for the second color light is greater than or equal to 0.8 and less than or equal to 1.25.

[0008] In some embodiments, the wavelength of the first color light is greater than the wavelength of the second color light, and the thickness of the first compensation pattern is greater than the thickness of the second compensation pattern.

[0009] In some embodiments, the first compensation pattern and the second compensation pattern have the same biaxial refractive index difference, and the ratio of the thickness of the first compensation pattern to the thickness of the second compensation pattern is approximately equal to the ratio of the wavelength of the first color light to the wavelength of the second color light.

[0010] In some embodiments, the wavelength of the first color light is greater than the wavelength of the second color light, and the biaxial refractive index difference of the first compensation pattern is greater than the biaxial refractive index difference of the second compensation pattern.

[0011] In some embodiments, the first compensation pattern and the second compensation pattern have the same thickness, and the ratio of the biaxial refractive index difference of the first compensation pattern to the biaxial refractive index difference of the second compensation pattern is approximately equal to the ratio of the wavelength of the first color light to the wavelength of the second color light.

[0012] In some embodiments, the multiple types of compensation patterns include:

[0013] Red light compensation pattern, used for phase compensation of red light;

[0014] A green light compensation pattern, used for performing phase compensation on green light; and

[0015] A blue light compensation pattern, used for phase compensation of blue light;

[0016] The first compensation pattern and the second compensation pattern are any two of the red light compensation pattern, the green light compensation pattern and the blue light compensation pattern.

[0017] In some embodiments, the compensation pattern has a thickness greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers.

[0018] In some embodiments, the biaxial refractive index difference of the compensation pattern is greater than or equal to 0.08 and less than or equal to 0.12.

[0019] In some embodiments, the material of the compensation film includes liquid crystal polymer.

[0020] The present disclosure provides a polarizer, comprising: a polarizing layer; and a first compensation film, wherein the first compensation film is the compensation film provided in any embodiment, and the first compensation film is stacked on one side of the polarizing layer.

[0021] In some embodiments, the polarizer further comprises:

[0022] The pressure-sensitive adhesive layer is arranged between the polarizing layer and the first compensation film, and includes a plurality of pressure-sensitive adhesive patterns. In the normal direction of the polarizer, the thicknesses of the overlapping pressure-sensitive adhesive patterns and the compensation patterns are complementary, so that the surface of the first compensation film away from the polarizing layer is roughly a plane.

[0023] The present disclosure provides a liquid crystal display panel, comprising a first compensation film, wherein the first compensation film is the compensation film provided in any embodiment;

[0024] The liquid crystal display panel includes sub-pixels of multiple colors, and in the orthographic projection on the plane where the liquid crystal display panel is located, sub-pixels of different colors overlap with compensation patterns of different types.

[0025] In some embodiments, the liquid crystal display panel further includes: a first polarizer, an array substrate, a liquid crystal layer, a cell substrate, and a polarizing layer stacked in sequence, wherein the first compensation film is located between the cell substrate and the polarizing layer.

[0026] The present disclosure provides a display device, comprising:

[0027] A liquid crystal display panel as provided in any embodiment;

[0028] A backlight module, arranged on the light incident side of the liquid crystal display panel; and

[0029] A driving component is connected to the liquid crystal display panel and is used to drive the liquid crystal display panel to display.

[0030] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0032] Figure 1 The cross-sectional structure diagram of a liquid crystal display panel in the related art is exemplarily shown;

[0033] Figure 2 The side viewing angle display effect of a liquid crystal display panel in the related art is exemplarily shown;

[0034] Figure 3 The cross-sectional structure diagram of another liquid crystal display panel in the related art is exemplarily shown;

[0035] Figure 4 The following is an exemplary diagram showing a Poincaré ball simulation diagram of another liquid crystal display panel in the related art;

[0036] Figure 5 The side viewing angle display effect of another liquid crystal display panel in the related art is exemplarily shown;

[0037] Figure 6Another light leakage simulation diagram of a liquid crystal display panel in the related art is exemplarily shown;

[0038] Figure 7 The light leakage brightness curves of another liquid crystal display panel in the related art at a viewing angle of 75° and different azimuth angles are exemplarily shown;

[0039] Figure 8 The schematic diagram of the planar structure of a compensation film provided by the present disclosure is exemplarily shown;

[0040] Fig. 9 The cross-sectional structure diagram of a compensation film provided by the present disclosure is exemplarily shown;

[0041] Fig.10 The comparison results of the phase compensation of the incident light by the red light compensation pattern, the green light compensation pattern and the blue light compensation pattern are shown by way of example;

[0042] Fig.11 A Poincaré ball simulation diagram of a liquid crystal display panel provided by the present disclosure is exemplarily shown;

[0043] Fig.12 A light leakage simulation diagram of a liquid crystal display panel provided by the present disclosure is exemplarily shown;

[0044] Fig.13 The red light leakage brightness curves of two liquid crystal display panels at a viewing angle of 75° and different azimuth angles are exemplarily shown;

[0045] Fig.14 The cross-sectional structure diagram of a polarizer provided by the present disclosure is exemplarily shown;

[0046] Fig.15 A schematic diagram of a planar structure of a liquid crystal display panel provided by the present disclosure is exemplarily shown;

[0047] Fig.16 A schematic cross-sectional structure diagram of a liquid crystal display panel provided by the present disclosure is exemplarily shown. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0049] Reference Figure 1The cross-sectional structure diagram of a liquid crystal display panel in the related art is shown as an example. Figure 1 As shown, the liquid crystal display panel adopts the Advanced Super Dimension Switch (ADS) technology, including an upper glass substrate 11 and a lower glass substrate 12 which are arranged relatively, a liquid crystal layer 13 filled between the upper glass substrate 11 and the lower glass substrate 12, an upper polarizer 14 attached to the outer side of the upper glass substrate 11, and a lower polarizer 15 attached to the outer side of the lower glass substrate 12 and having a transmission axis angle perpendicular to the upper polarizer 14. The upper polarizer 14 and the lower polarizer 15 play a polarizing role and can convert natural light into linear polarized light. In the dark state, the polarization state of the light at the normal viewing angle is perpendicular to the transmission axis of the upper polarizer 14, and the normal viewing angle light can hardly pass through the upper polarizer 14. The polarization state of the oblique viewing angle light is not completely perpendicular to the transmission axis of the upper polarizer 14, and the upper polarizer 14 cannot filter the non-vertical oblique viewing angle light, thereby causing light leakage, which actually manifests as whitening at a large viewing angle, such as Figure 2 As shown, this greatly reduces the image quality of the screen.

[0050] In the related art, in order to improve the whitening at a large viewing angle, a compensation layer 31 is usually used to reduce the light leakage at a side viewing angle, such as Figure 3 As shown, the compensation layer 31 (such as Figure 3 The A film + C film shown in the figure is located between the upper polarizer 14 and the upper glass substrate 11. The specific compensation principle is: Figure 4 In the Poincaré sphere simulation diagram shown in the figure, in the off-axis state, the polarization state of the light that can be completely absorbed by the upper polarizer 14 is point P. In the case where the compensation layer 31 is not provided, the polarization state actually incident on the upper polarizer 14 is point O, which means that the polarization state of the light incident on the upper polarizer 14 is not perpendicular to the absorption axis of the upper polarizer 14, resulting in light leakage due to the light component in the non-perpendicular direction. Figure 4 As shown, after the compensation layer 31 is added, the polarization state of the light incident on the upper polarizer 14 changes, the red light R moves from point O to point Lr, the green light G moves from point O to point Lg, and the blue light B moves from point O to point Lb, all of which are closer to point P, so there is less light leakage, thereby improving the whitening at a wide viewing angle.

[0051] However, the arrangement of the compensation layer 31 easily causes the problem that the color of the image is reddish at large viewing angles, such as Figure 5 The inventors based on Figure 3 The compensation layer 31 scheme shown in FIG. 1 simulates the light leakage of the three-color light of the liquid crystal display panel at different viewing angles under the L0 screen, such as Figure 6As shown in the figure, the green light leakage brightness is the smallest, and the red light leakage brightness is the largest, that is, the green light compensation effect is the best, the L0 leakage is the smallest, and the red light leakage is the most serious. Select the viewing angle Theta 75° to compare the leakage brightness of different azimuth angles Phi, as shown in the figure. Figure 7 As shown in the figure, at the position where the azimuth angle Phi is 225° and 315°, the red light leakage is the most serious, and the green light leakage is less at each azimuth angle, and the leakage brightness value is less than 100. Due to the different leakage degrees of the three colors of light, this leads to color shift, and the red light leakage brightness is the largest, which is actually manifested as follows Figure 5 Reddish purple shown.

[0052] The inventors analyzed the cause of the reddish color shift and found that this is because the polarization states of the three primary colors R / G / B produced by the compensation layer 31 are inconsistent, such as Figure 4 The Lr point, Lg point and Lb point shown. Further analysis shows that the change in the polarization state of light is related to the phase difference or phase compensation value 2πΔn*d / λ, where Δn is the difference in the biaxial refractive index of the compensation layer 31, d is the film thickness of the compensation layer 31, and λ is the wavelength of the incident light. The wavelengths of the three primary colors R / G / B are different. When 2πΔn*d is the same, the phase difference changes of the three primary colors are different, which leads to differences in polarization state changes.

[0053] Reference Figure 8 The schematic diagram of the planar structure of a compensation film provided by the present disclosure is exemplarily shown. Fig. 9 The cross-sectional structure diagram of a compensation film provided by the present disclosure is shown as an example. Figure 8 and Fig. 9 As shown, the compensation film array comprises a plurality of compensation units 81 , and each compensation unit 81 comprises a plurality of types of compensation patterns 08 .

[0054] For example, Figure 8 and Fig. 9 As shown, each compensation unit 81 includes three types of compensation patterns 08, which are: a red light compensation pattern 08R, used for phase compensation of red light R; a green light compensation pattern 08G, used for phase compensation of green light G; and a blue light compensation pattern 08B, used for phase compensation of blue light B.

[0055] The same type of compensation patterns 08 are used to perform phase compensation on incident light of the same color, and different types of compensation patterns 08 are used to perform phase compensation on incident light of different colors. At least two types of compensation patterns 08 have different thicknesses and / or biaxial refractive index differences.

[0056] The at least two types of compensation patterns 08 may include two types of compensation patterns 08 , may include more types of compensation patterns 08 , and may include at most all types of compensation patterns 08 in the compensation film.

[0057] For example, Figure 8 and Fig. 9 As shown, each compensation unit 81 includes three types of compensation patterns 08, and the at least two types of compensation patterns 08 may include two types of compensation patterns 08, or three types of compensation patterns 08. The two types of compensation patterns 08 may be, for example, a red light compensation pattern 08R and a green light compensation pattern 08G, or a green light compensation pattern 08G and a blue light compensation pattern 08B, or a red light compensation pattern 08R and a blue light compensation pattern 08B. The three types of compensation patterns 08 may be, for example, a red light compensation pattern 08R, a green light compensation pattern 08G, and a blue light compensation pattern 08B.

[0058] The different thickness and / or biaxial refractive index difference includes: different thickness, or different biaxial refractive index difference, or different thickness and biaxial refractive index difference.

[0059] Since the change in the polarization state of light is related to the phase difference 2πΔn*d / λ, by differentially setting the thickness d and / or the biaxial refractive index difference Δn of at least two types of compensation patterns 08, the 2πΔn*d of at least two types of compensation patterns 08 are different, thereby offsetting or reducing the phase difference or phase compensation difference caused by the different wavelengths of incident light of different colors, so that the polarization state changes generated by the incident light of different colors through their respective corresponding compensation patterns 08 tend to be consistent, and the compensation effects of at least two incident lights of different colors can be independently improved, thereby improving the problem of reddish color bias when viewed from the side.

[0060] Exemplarily, the compensation film may include one or more red light compensation patterns 08R, and the one or more red light compensation patterns 08R are all the same type of compensation pattern 08. The compensation film may include one or more green light compensation patterns 08G, and the one or more green light compensation patterns 08G are all the same type of compensation pattern 08. The compensation film may include one or more blue light compensation patterns 08B, and the one or more blue light compensation patterns 08B are all the same type of compensation pattern 08.

[0061] For example, the same type of compensation patterns 08 may have substantially the same thickness and biaxial refractive index difference, so that the same phase compensation effect can be produced for incident light of the same color, and the manufacturing process can be simplified.

[0062] Exemplarily, the two types of compensation patterns 08, the red light compensation pattern 08R and the green light compensation pattern 08G, have different thicknesses and / or biaxial refractive index differences, and the green light compensation pattern 08G and the blue light compensation pattern 08B may have the same thickness and biaxial refractive index difference. This example can simultaneously improve the compensation effect of the red light R and the green light G, and improve the problem of reddish color when viewed from the side. In addition, since the green light compensation pattern 08G and the blue light compensation pattern 08B have the same thickness and biaxial refractive index difference, the two can be prepared simultaneously, thereby simplifying the preparation process.

[0063] Exemplarily, the two types of compensation patterns 08, the red light compensation pattern 08R and the blue light compensation pattern 08B, have different thicknesses and / or biaxial refractive index differences, and the blue light compensation pattern 08B and the green light compensation pattern 08G may have the same thickness and biaxial refractive index difference. This example can simultaneously improve the compensation effect of the red light R and the blue light B, and improve the problem of reddish color when viewed from the side. In addition, since the blue light compensation pattern 08B and the green light compensation pattern 08G have the same thickness and biaxial refractive index difference, the two can be prepared simultaneously, thereby simplifying the preparation process.

[0064] Exemplarily, the two types of compensation patterns 08, the green light compensation pattern 08G and the blue light compensation pattern 08B, have different thicknesses and / or biaxial refractive index differences, and the green light compensation pattern 08G and the red light compensation pattern 08R may have the same thickness and biaxial refractive index difference. This example can simultaneously improve the compensation effects of the green light G and the blue light B. In addition, since the green light compensation pattern 08G and the red light compensation pattern 08R have the same thickness and biaxial refractive index difference, the two can be prepared simultaneously, thereby simplifying the preparation process.

[0065] For example, the three types of compensation patterns 08, namely, the red light compensation pattern 08R, the green light compensation pattern 08G and the blue light compensation pattern 08B, have different thicknesses and / or biaxial refractive index differences. This example can simultaneously improve the compensation effects of the red light R, the green light G and the blue light B, and improve the problem of the side-view character being reddish.

[0066] In a specific implementation, for example, the light leakage compensation of the green light G can be first optimized, and the thickness of the green light compensation pattern 08G and the biaxial refractive index difference can be determined; then, based on the green light compensation pattern 08G, the thickness and / or biaxial refractive index difference of other compensation patterns 08 can be adjusted to improve the light leakage compensation of incident light of other colors.

[0067] In some embodiments, at least two types of compensation patterns 08 include: a first compensation pattern for performing phase compensation on a first color light; and a second compensation pattern for performing phase compensation on a second color light. The ratio of the phase compensation value ψ1 of the first compensation pattern for the first color light to the phase compensation value ψ2 of the second compensation pattern for the second color light is greater than or equal to 0.8 and less than or equal to 1.25 or 1.2. In this way, the color deviation problem of the side view can be adjusted to a level that is almost invisible to the naked eye.

[0068] The phase compensation value ψ1 of the first compensation pattern for the first color light can be calculated according to the following formula: ψ1=2πΔn1*d1 / λ1, where Δn1 is the biaxial refractive index difference Δn1 of the first compensation pattern, d1 is the thickness d1 of the first compensation pattern, and λ1 is the wavelength λ1 of the first color light. The phase compensation value ψ2ψ2 of the second compensation pattern for the second color light can be calculated according to the following formula: ψ2=2πΔn2*d2 / λ2, where Δn2 is the biaxial refractive index difference Δn2 of the second compensation pattern, d2 is the thickness d2 of the second compensation pattern, and λ2 is the wavelength λ2 of the second color light. The ratio of the phase compensation value ψ1 of the first compensation pattern for the first color light to the phase compensation value ψ2ψ2 of the second compensation pattern for the second color light is 0.8≤ψ1 / ψ2≤1.25, or 0.8≤ψ1 / ψ2≤1.2.

[0069] The first compensation pattern and the second compensation pattern are any two types of compensation patterns 08 among at least two types of compensation patterns 08 .

[0070] In order to reduce the difference between the phase compensation value ψ1 of the first compensation pattern for the first color light and the phase compensation value ψ2 of the second compensation pattern for the second color light, in some embodiments, the wavelength λ1 of the first color light is greater than the wavelength λ2 of the second color light, and the thickness d1 of the first compensation pattern is greater than the thickness d2 of the second compensation pattern. In this way, the phase difference caused by the wavelength difference between the first color light and the second color light can be reduced.

[0071] Furthermore, the biaxial refractive index difference Δn1 of the first compensation pattern is the same as the biaxial refractive index difference Δn2 of the second compensation pattern, and the ratio of the thickness d1 of the first compensation pattern to the thickness d2 of the second compensation pattern is approximately equal to the ratio of the wavelength λ1 of the first color light to the wavelength λ2 of the second color light.

[0072] In order to reduce the difference between the phase compensation value ψ1 of the first compensation pattern for the first color light and the phase compensation value ψ2 of the second compensation pattern for the second color light, in other embodiments, the wavelength λ1 of the first color light is greater than the wavelength λ2 of the second color light, and the biaxial refractive index difference Δn1 of the first compensation pattern is greater than the biaxial refractive index difference Δn2 of the second compensation pattern. In this way, the phase difference difference caused by the wavelength difference between the first color light and the second color light can be reduced.

[0073] Furthermore, the thickness d1 of the first compensation pattern is the same as the thickness d2 of the second compensation pattern, and the ratio of the biaxial refractive index difference Δn1 of the first compensation pattern to the biaxial refractive index difference Δn2 of the second compensation pattern is substantially equal to the ratio of the wavelength λ1 of the first color light to the wavelength λ2 of the second color light.

[0074] Exemplarily, the first compensation pattern and the second compensation pattern are any two of the red compensation pattern 08R, the green compensation pattern 08G and the blue compensation pattern 08B. In specific implementation, the first compensation pattern and the second compensation pattern can have multiple combinations, which are exemplarily described below.

[0075] In some examples, such as Figure 8 and Fig. 9 As shown in Figures a and b in FIG. 1 , at least two types of compensation patterns 08 include red light compensation patterns 08R and green light compensation patterns 08G. The red light compensation patterns 08R and green light compensation patterns 08G have different thicknesses or biaxial refractive index differences. The first compensation pattern is the red light compensation pattern 08R, and the first color light is the red light R. The second compensation pattern is the green light compensation pattern 08G, and the second color light is the green light G. By setting the ratio of the phase compensation value of the red light compensation pattern 08R to the red light R to the phase compensation value of the green light compensation pattern 08G to the green light G to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the side-view color reddening problem can be adjusted to a level that is almost invisible to the naked eye.

[0076] For example, Fig. 9 As shown in FIG. a and FIG. b , the thickness of the blue light compensation pattern 08B may be the same as the thickness of the green light compensation pattern 08G, and the biaxial refractive index difference of the blue light compensation pattern 08B may be the same as the biaxial refractive index difference of the green light compensation pattern 08G.

[0077] In order to reduce the phase difference between the red light R and the green light G, illustratively, as Fig. 9 As shown in FIG. a, the thickness of the red light compensation pattern 08R is greater than that of the green light compensation pattern 08G. In this way, the phase difference between the red light R and the green light G caused by the wavelength difference can be reduced, and the reddish color shift phenomenon can be improved.

[0078] Furthermore, the biaxial refractive index difference of the red light compensation pattern 08R is the same as that of the green light compensation pattern 08G, and the ratio of the thickness of the red light compensation pattern 08R to the thickness of the green light compensation pattern 08G is approximately equal to the ratio of the wavelength of the red light R to the wavelength of the green light G.

[0079] In order to reduce the phase difference between the red light R and the green light G, illustratively, the biaxial refractive index difference of the red light compensation pattern 08R is greater than the biaxial refractive index difference of the green light compensation pattern 08G. In this way, the phase difference between the red light R and the green light G caused by the wavelength difference can be reduced, and the reddish color shift phenomenon can be improved.

[0080] Furthermore, if Fig. 9 As shown in Figure b, the thickness of the red light compensation pattern 08R is the same as the thickness of the green light compensation pattern 08G, and the ratio of the biaxial refractive index difference of the red light compensation pattern 08R to the biaxial refractive index difference of the green light compensation pattern 08G is approximately equal to the ratio of the wavelength of the red light R to the wavelength of the green light G.

[0081] In other examples, such as Figure 8 and Fig. 9 As shown in Figures a and b in FIG. 1 , at least two types of compensation patterns 08 include red light compensation patterns 08R and blue light compensation patterns 08B. The red light compensation patterns 08R and the blue light compensation patterns 08B have different thicknesses or biaxial refractive index differences. The first compensation pattern is the red light compensation pattern 08R, and the first color light is the red light R. The second compensation pattern is the blue light compensation pattern 08B, and the second color light is the blue light B. By setting the ratio of the phase compensation value of the red light compensation pattern 08R to the red light R to the phase compensation value of the blue light compensation pattern 08B to the blue light B to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the side-view color reddening problem can be adjusted to a level that is almost invisible to the naked eye.

[0082] For example, Fig. 9 As shown in FIG. a and FIG. b , the thickness of the blue light compensation pattern 08B may be the same as the thickness of the green light compensation pattern 08G, and the biaxial refractive index difference of the blue light compensation pattern 08B may be the same as the biaxial refractive index difference of the green light compensation pattern 08G.

[0083] In order to reduce the phase difference between the red light R and the blue light B, illustratively, as Fig. 9 As shown in FIG. a, the thickness of the red light compensation pattern 08R is greater than that of the blue light compensation pattern 08B. In this way, the phase difference between the red light R and the blue light B due to the wavelength difference can be reduced, and the reddish color shift phenomenon can be improved.

[0084] Furthermore, the biaxial refractive index difference of the red light compensation pattern 08R is the same as that of the blue light compensation pattern 08B, and the ratio of the thickness of the red light compensation pattern 08R to the thickness of the blue light compensation pattern 08B is approximately equal to the ratio of the wavelength of the red light R to the wavelength of the blue light B.

[0085] In order to reduce the phase difference between the red light R and the blue light B, illustratively, the biaxial refractive index difference of the red light compensation pattern 08R is greater than the biaxial refractive index difference of the blue light compensation pattern 08B. In this way, the phase difference between the red light R and the blue light B caused by the wavelength difference can be reduced, and the reddish color shift phenomenon can be improved.

[0086] Furthermore, if Fig. 9 As shown in Figure b, the thickness of the red light compensation pattern 08R is the same as the thickness of the blue light compensation pattern 08B, and the ratio of the biaxial refractive index difference of the red light compensation pattern 08R to the biaxial refractive index difference of the blue light compensation pattern 08B is roughly equal to the ratio of the wavelength of the red light R to the wavelength of the blue light B.

[0087] In other examples, such as Figure 8 and Fig. 9 As shown in Figures c and b in FIG. 1 , at least two types of compensation patterns 08 include green light compensation patterns 08G and blue light compensation patterns 08B. The green light compensation patterns 08G and the blue light compensation patterns 08B have different thicknesses or biaxial refractive index differences. The first compensation pattern is the green light compensation pattern 08G, and the first color light is the green light G. The second compensation pattern is the blue light compensation pattern 08B, and the second color light is the blue light B. By setting the ratio of the phase compensation value of the green light compensation pattern 08G to the green light G to the phase compensation value of the blue light compensation pattern 08B to the blue light B to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the side view color deviation problem can be adjusted to a level that is almost invisible to the naked eye.

[0088] For example, Fig. 9 As shown in FIG. c and FIG. b, the thickness of the green compensation pattern 08G may be the same as the thickness of the red compensation pattern 08R, and the biaxial refractive index difference of the red compensation pattern 08R may be the same as the biaxial refractive index difference of the green compensation pattern 08G.

[0089] In order to reduce the phase difference between the green light G and the blue light B, illustratively, as Fig. 9 As shown in Figure c, the thickness of the green light compensation pattern 08G is greater than the thickness of the blue light compensation pattern 08B. In this way, the phase difference caused by the wavelength difference between the green light G and the blue light B can be reduced, and the color shift phenomenon can be improved.

[0090] Furthermore, the biaxial refractive index difference of the green light compensation pattern 08G is the same as that of the blue light compensation pattern 08B, and the ratio of the thickness of the green light compensation pattern 08G to the thickness of the blue light compensation pattern 08B is approximately equal to the ratio of the wavelength of the green light G to the wavelength of the blue light B.

[0091] In order to reduce the phase difference between the green light G and the blue light B, the biaxial refractive index difference of the green light compensation pattern 08G is exemplarily greater than the biaxial refractive index difference of the blue light compensation pattern 08B. In this way, the phase difference between the green light G and the blue light B caused by the wavelength difference can be reduced, and the color shift phenomenon can be improved.

[0092] Furthermore, if Fig. 9 As shown in Figure b, the thickness of the green light compensation pattern 08G is the same as the thickness of the blue light compensation pattern 08B, and the ratio of the biaxial refractive index difference of the green light compensation pattern 08G to the biaxial refractive index difference of the blue light compensation pattern 08B is roughly equal to the ratio of the wavelength of the green light G to the wavelength of the blue light B.

[0093] In other examples, such as Figure 8 and Fig. 9 As shown in the d and b figures in FIG. 1 , at least two types of compensation patterns 08 include three types of compensation patterns 08, namely, red light compensation pattern 08R, green light compensation pattern 08G, and blue light compensation pattern 08B. The red light compensation pattern 08R, the green light compensation pattern 08G, and the blue light compensation pattern 08B have different thicknesses or biaxial refractive index differences. If the first compensation pattern is the red light compensation pattern 08R, the second compensation pattern is the green light compensation pattern 08G or the blue light compensation pattern 08B. If the first compensation pattern is the green light compensation pattern 08G, the second compensation pattern is the blue light compensation pattern 08B. This example can reduce the phase difference difference caused by the wavelength difference of the red light R, the green light G, and the blue light B, thereby adjusting the side view color deviation problem to a level that is almost invisible to the naked eye.

[0094] In order to reduce the phase difference of the red light R, the green light G and the blue light B, illustratively, as Fig. 9 As shown in Figure d, the thickness of the red light compensation pattern 08R is greater than the thickness of the green light compensation pattern 08G, and the thickness of the green light compensation pattern 08G is greater than the thickness of the blue light compensation pattern 08B. In this way, the phase difference caused by the wavelength difference of the red light R, the green light G and the blue light B can be reduced, and the reddish color shift phenomenon can be improved.

[0095] Furthermore, the red light compensation pattern 08R, the green light compensation pattern 08G and the blue light compensation pattern 08B have the same difference in biaxial refractive index, the ratio of the thickness of the red light compensation pattern 08R to the thickness of the green light compensation pattern 08G is approximately equal to the ratio of the wavelength of the red light R to the wavelength of the green light G, and the ratio of the thickness of the green light compensation pattern 08G to the thickness of the blue light compensation pattern 08B is approximately equal to the ratio of the wavelength of the green light G to the wavelength of the blue light B.

[0096] In order to reduce the phase difference between the red light R, the green light G and the blue light B, illustratively, the biaxial refractive index difference of the red light compensation pattern 08R is greater than the biaxial refractive index difference of the green light compensation pattern 08G, and the biaxial refractive index difference of the green light compensation pattern 08G is greater than the biaxial refractive index difference of the blue light compensation pattern 08B. In this way, the phase difference difference caused by the wavelength difference of the red light R, the green light G and the blue light B can be reduced, thereby improving the reddish color shift phenomenon.

[0097] Furthermore, if Fig. 9 As shown in Figure b, the thicknesses of the red light compensation pattern 08R, the green light compensation pattern 08G and the blue light compensation pattern 08B are the same, the ratio of the biaxial refractive index difference of the red light compensation pattern 08R to the biaxial refractive index difference of the green light compensation pattern 08G is approximately equal to the ratio of the wavelength of the red light R to the wavelength of the green light G, and the ratio of the biaxial refractive index difference of the green light compensation pattern 08G to the biaxial refractive index difference of the blue light compensation pattern 08B is approximately equal to the ratio of the wavelength of the green light G to the wavelength of the blue light B.

[0098] Exemplarily, the wavelength of the red light R, the wavelength of the green light G, and the wavelength of the blue light B adopt the standard wavelengths of the three primary colors.

[0099] Reference Fig.10 The phase compensation comparison results of the incident light by the red light compensation pattern 08R, the green light compensation pattern 08G and the blue light compensation pattern 08B are shown, wherein the biaxial refractive index differences of the red light compensation pattern 08R, the green light compensation pattern 08G and the blue light compensation pattern 08B are the same, which is Δn. Fig.10It can be found that when the thickness of the red light compensation pattern 08R, the green light compensation pattern 08G, and the blue light compensation pattern 08B are all 0.69μm, the phase difference generated by the red light R is the smallest, which is 0.098%*2πΔn, and the difference between the phase difference generated by the green light G and the phase difference generated by the blue light B is large. When the thickness of the red light compensation pattern 08R increases to 1μm, the phase difference of the red light R is 0.14%*2πΔn, and the difference between the phase difference with the green light G and the phase difference with the blue light B decreases. The thickness of the red light compensation pattern 08R increases from 0.69μm to 1μm. As the thickness gradually increases, the difference in the phase difference with the blue light B and the green light G becomes smaller, the red light leakage becomes less, and the improvement effect of the reddish color shift becomes better.

[0100] Reference Fig.11 It shows that after the thickness of the red light compensation pattern 08R increases from 0.69 μm to 1.0 μm, the polarization path of the red light R continues to lengthen along the original direction, and the polarization state moves from point Lr to point L'r. Since point L'r is closer to point P, there is less red light leakage.

[0101] Reference Fig.12 The figure shows the simulated light leakage of the red light R at different viewing angles of the display panel in the L0 screen. The thickness of the red light compensation pattern 08R corresponding to the left figure is 0.69 μm, and the thickness of the red light compensation pattern 08R corresponding to the right figure is 1 μm. Fig.12 It can be found that after the thickness of the red light compensation pattern 08R is increased to 1μm, the brightness of the red light R at the azimuth angles Phi of 45° and 135° is greatly reduced, and there is basically no light leakage. In addition, the light leakage at the two azimuth angles Phi of 225° and 315°, where the light leakage is the most serious in the left figure, is also reduced. Select the viewing angle Theta 75° to compare the brightness of the light leakage at different azimuth angles Phi, such as Fig.13 As shown, after the thickness of the red light compensation pattern 08R is increased to 1 μm, the red light leakage is reduced, thus greatly improving the red color cast problem.

[0102] In some embodiments, the thickness of the compensation pattern 08 is greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers.

[0103] Exemplarily, the thickness of the red light compensation pattern 08R is greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers. The thickness of the green light compensation pattern 08G is greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers. The thickness of the blue light compensation pattern 08B is greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers.

[0104] In some embodiments, the biaxial refractive index difference of the compensation pattern 08 is greater than or equal to 0.08 and less than or equal to 0.12.

[0105] Exemplarily, the biaxial refractive index difference of the red light compensation pattern 08R is greater than or equal to 0.08 and less than or equal to 0.12. The biaxial refractive index difference of the green light compensation pattern 08G is greater than or equal to 0.08 and less than or equal to 0.12. The biaxial refractive index difference of the blue light compensation pattern 08B is greater than or equal to 0.08 and less than or equal to 0.12.

[0106] In some embodiments, the material of the compensation film includes a liquid crystal polymer.

[0107] Compared with ordinary photoelectric liquid crystal molecules, in terms of molecular structure, liquid crystal polymers have one or more reactive functional groups at the ends of liquid crystal molecules in addition to liquid crystal molecules. The above combination can be photopolymerized into a polymer network, that is, a liquid crystal polymer. Since the polymerization initiator used is mostly UV-sensitive (photosensitive wavelength is 254nm to 365nm), liquid crystal polymers are also called UV-reactive liquid crystals. Among them, the liquid crystal molecules can be, for example, rod-shaped or disc-shaped liquid crystal molecules.

[0108] It should be noted that the compensation film can also be a polymer stretch film, which is formed by uniaxial or biaxial stretching of polymers. Stretching can deflect the originally randomly arranged isotropic molecular axes to anisotropic ones, thereby making the traveling speed of incident light from different directions different, thereby adjusting or compensating the phase of light.

[0109] Since the biaxial refractive index difference of liquid crystal polymer is ten or even a hundred times that of polymer stretched film, the compensation film made of liquid crystal polymer has a smaller thickness and is very suitable for roll-to-roll coating process, which is conducive to the thinning of display panels. In addition, under the same thickness, the compensation film made of liquid crystal polymer can achieve better compensation effect.

[0110] In specific implementation, the compensation film made of liquid crystal polymer can be formed by a coating process, such as wire rod coating, extrusion coating, direct gravure coating, reverse gravure coating, and die coating.

[0111] Exemplarily, the compensation film may include one or more of a positive C film, a negative C film, a positive A film, a negative A film, a positive B film, and a negative B film, which is not limited in the present disclosure. In specific implementation, a suitable film layer may be selected according to the refractive index and the uniaxial and biaxial requirements.

[0112] The present disclosure provides a polarizer, such as Fig.14 As shown, the polarizer includes: a polarizing layer 141 ; and a first compensation film 142 . The first compensation film 142 is a compensation film provided in any embodiment, and the first compensation film 142 is stacked on one side of the polarizing layer 141 .

[0113] Those skilled in the art can understand that the polarizer provided by the present disclosure has the advantages of the above-mentioned compensation film.

[0114] In some embodiments, Fig.14 As shown, the polarizer further includes: a pressure-sensitive adhesive layer 143, which is disposed between the polarizing layer 141 and the first compensation film 142, and includes a plurality of pressure-sensitive adhesive patterns PSA, and in the normal direction f1 of the polarizer, the thickness of the overlapping pressure-sensitive adhesive patterns PSA and the compensation pattern 08 are complementary, so that the surface of the first compensation film 142 away from the polarizing layer 141 is roughly a plane. The overlapping means that the orthographic projections in the normal direction f1 of the polarizer overlap with each other, that is, the orthographic projections on the plane where the polarizer is located overlap with each other.

[0115] By filling the thickness difference between different compensation patterns 08 with the pressure-sensitive adhesive pattern PSA, the surface of the first compensation film 142 away from the polarizing layer 141 is made flat, which facilitates the production of subsequent film layers and the attachment of polarizers, improves the uniformity of the image quality of the display panel, and reduces Mura defects.

[0116] By way of example, by disposing a pressure-sensitive adhesive layer 143 between the polarizing layer 141 and the first compensation film 142 , the adhesion of the first compensation film 142 can be improved.

[0117] For example, in the normal direction f1 of the polarizer, the sum of the thicknesses of the overlapping pressure-sensitive adhesive pattern PSA and the compensation pattern 08 may be substantially the same at different positions.

[0118] For example, Fig.14 As shown, the thickness of the red light compensation pattern 08R is greater than that of the green light compensation pattern 08G. In order to make the surface of the first compensation film 142 facing away from the polarizing layer 141 smooth, in the normal direction f1 of the polarizer, the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the red light compensation pattern 08R is less than the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the green light compensation pattern 08G, and the difference between the two is approximately equal to the difference between the thickness of the red light compensation pattern 08R and the green light compensation pattern 08G.

[0119] For example, Fig.14 As shown, the thickness of the green light compensation pattern 08G is equal to the thickness of the blue light compensation pattern 08B. In order to make the surface of the first compensation film 142 facing away from the polarizing layer 141 smooth, in the normal direction f1 of the polarizer, the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the green light compensation pattern 08G is equal to the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the blue light compensation pattern 08B.

[0120] Exemplarily, the thickness of the green light compensation pattern 08G is greater than the thickness of the blue light compensation pattern 08B. In order to make the surface of the first compensation film 142 facing away from the polarizing layer 141 smooth, in the normal direction f1 of the polarizer, the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the green light compensation pattern 08G is less than the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the blue light compensation pattern 08B, and the difference between the two is approximately equal to the difference between the thickness of the green light compensation pattern 08G and the blue light compensation pattern 08B.

[0121] For example, Fig.14 As shown, the polarizer may further include: a second compensation film 144, located on the side of the first compensation film 142 away from the polarizing layer 141. The second compensation film 144 may be, for example, a positive A film, a negative A film, a positive B film or a negative B film.

[0122] For example, the first compensation film 142 uses a positive C film, and the second compensation film 144 uses a positive A film. The polarizer is attached to the surface of the display panel, which can reduce the side viewing angle light leakage of the display panel, and can effectively improve the problems of halo, black field floating at side viewing angles, and color fading. If the display panel uses negative liquid crystal, it can further improve the large viewing angle light leakage and whitening problem, improve the contrast, and make the image quality of the liquid crystal display panel comparable to that of the organic light-emitting diode (OLED) display panel.

[0123] For example, the polarizing layer 141 may include a triacetate film, and a polyvinyl alcohol film disposed on a side of the triacetate film close to the first compensation film 142 , etc., which is not limited in the present disclosure.

[0124] For example, the second compensation film 144 may be a polymer stretch film, and the material may include polyvinyl alcohol, etc., which is not limited in the present disclosure.

[0125] The present disclosure provides a liquid crystal display panel, such as Figure 15 to Figure 16 As shown, the liquid crystal display panel includes a first compensation film 142, and the first compensation film 142 is a compensation film provided in any embodiment. The liquid crystal display panel includes sub-pixels P of multiple colors, and in the orthographic projection on the plane where the liquid crystal display panel is located, sub-pixels P of different colors overlap with different compensation patterns 08.

[0126] Those skilled in the art can understand that the liquid crystal display panel provided by the present disclosure has the advantages of the above-mentioned compensation film.

[0127] For example, Fig.16As shown, the sub-pixels P of multiple colors include a red sub-pixel PR, a green sub-pixel PG, and a blue sub-pixel PB. The first compensation film 142 includes a red light compensation pattern 08R, a green light compensation pattern 08G, and a blue light compensation pattern 08B. In the orthographic projection on the plane where the liquid crystal display panel is located, the red sub-pixel PR overlaps with the red light compensation pattern 08R, the green sub-pixel PG overlaps with the green light compensation pattern 08G, and the blue sub-pixel PB overlaps with the blue light compensation pattern 08B.

[0128] In some embodiments, Fig.16 As shown, the liquid crystal display panel further includes: a first polarizer POL1, an array substrate 162, a liquid crystal layer 163, a cell substrate 164 and a polarizing layer 141 which are stacked in sequence. The array substrate 162, the liquid crystal layer 163 and the cell substrate 164 form a liquid crystal cell.

[0129] For example, the first compensation film 142 may be disposed outside the box. Fig.16 As shown, the first compensation film 142 is located between the cell substrate 164 and the polarizing layer 141. In this example, the first compensation film 142 and the polarizing layer 141 constitute a second polarizer POL2, which can be a polarizer provided in any of the above embodiments.

[0130] For example, Fig.15 As shown, the edge of the first polarizer POL1 is retracted relative to the edge of the second polarizer POL2.

[0131] Considering factors such as attachment accuracy and process deviation, the edge of the second polarizer POL2 may be retracted or expanded relative to the edge of the cell substrate 164. For a frameless product, the expansion size may be, for example, 0.2 mm.

[0132] Exemplarily, the first compensation film 142 may also be disposed in the box, for example, between the array substrate 162 and the liquid crystal layer 163 , or between the liquid crystal layer 163 and the counter-box substrate 164 , which is not limited in the present disclosure.

[0133] The present disclosure provides a display device, comprising: a liquid crystal display panel as provided in any embodiment; a backlight module, arranged on the light incident side of the liquid crystal display panel; and a driving component, connected to the liquid crystal display panel, for driving the liquid crystal display panel to display.

[0134] Those skilled in the art can understand that the display device provided by the present disclosure has the advantages of the above-mentioned compensation film.

[0135] The display device provided by the present disclosure can be: a display module, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a car display device, a smart watch, a fitness wristband, a personal digital assistant, or any other product or component with a display function.

[0136] In the present disclosure, “plurality” means two or more, and “at least one” means one or more, unless otherwise clearly and specifically defined.

[0137] In the present disclosure, the orientation or positional relationship indicated by the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0138] As used herein, the terms "comprises," "includes," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, product, or device. In the absence of further limitations, an element defined by the phrase "includes a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0139] References herein to "one embodiment," "some embodiments," "exemplary embodiments," "one or more embodiments," "example," "an example," "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0140] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0141] When describing some embodiments, the expressions "coupled" and "connected" may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. As another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0142] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0143] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0144] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [a stated condition or event] is detected" are optionally interpreted to mean "upon determining that" or "in response to determining that" or "upon detecting [a stated condition or event]" or "in response to detecting [a stated condition or event]," depending on the context.

[0145] The use of "for" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0146] The use of "based on" or "according to" herein is meant to be open and inclusive. A process, step, calculation or other action based on one or more of the conditions or values ​​may, in practice, be based on other conditions or exceed the values ​​described. A process, step, calculation or other action based on one or more of the conditions or values ​​may, in practice, be based on other conditions or exceed the values ​​described.

[0147] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0148] As used herein, "parallel", "perpendicular", "equal", and "flush" include the situations described and situations similar to the situations described, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, that the difference between the two being equal is less than or equal to 5% of either one. "Flush" includes absolute flushness and approximate flushness, wherein the acceptable deviation range for approximate flushness may be, for example, that the distance between the two being flush is less than or equal to 5% of the size of either one.

[0149] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0150] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions is exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of the regions of the device, and are not intended to limit the scope of the exemplary embodiments. Unless otherwise specified, the thickness of a film layer refers to the size of the film layer in the direction of its normal.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A compensation film, comprising a plurality of compensation units, wherein the compensation units comprise a plurality of types of compensation patterns, wherein the same type of compensation patterns are used to perform phase compensation on incident light of the same color, and different types of compensation patterns are used to perform phase compensation on incident light of different colors, wherein: At least two types of compensation patterns have different thicknesses and / or biaxial refractive index differences.

2. The compensation film according to claim 1, wherein: The at least two types of compensation patterns include: A first compensation pattern, used for performing phase compensation on the first color light; and A second compensation pattern, used for performing phase compensation on the second color light; The ratio of the phase compensation value of the first compensation pattern for the first color light to the phase compensation value of the second compensation pattern for the second color light is greater than or equal to 0.8 and less than or equal to 1.

25.

3. The compensation film according to claim 2, wherein: The wavelength of the first color light is greater than the wavelength of the second color light, and the thickness of the first compensation pattern is greater than the thickness of the second compensation pattern.

4. The compensation film according to claim 3, wherein: The first compensation pattern and the second compensation pattern have the same biaxial refractive index difference, and the ratio of the thickness of the first compensation pattern to the thickness of the second compensation pattern is substantially equal to the ratio of the wavelength of the first color light to the wavelength of the second color light.

5. The compensation film according to claim 2, wherein: The wavelength of the first color light is greater than the wavelength of the second color light, and the biaxial refractive index difference of the first compensation pattern is greater than the biaxial refractive index difference of the second compensation pattern.

6. The compensation film according to claim 5, wherein: The first compensation pattern and the second compensation pattern have the same thickness, and the ratio of the biaxial refractive index difference of the first compensation pattern to the biaxial refractive index difference of the second compensation pattern is substantially equal to the ratio of the wavelength of the first color light to the wavelength of the second color light.

7. The compensation film according to claim 2, wherein: The various types of compensation patterns include: Red light compensation pattern, used for phase compensation of red light; A green light compensation pattern, used for performing phase compensation on green light; and A blue light compensation pattern, used for phase compensation of blue light; The first compensation pattern and the second compensation pattern are any two of the red light compensation pattern, the green light compensation pattern and the blue light compensation pattern.

8. The compensation film according to any one of claims 1 to 7, wherein: The thickness of the compensation pattern is greater than or equal to 0.1 micrometers and less than or equal to 10 micrometers.

9. The compensation film according to any one of claims 1 to 7, wherein: The biaxial refractive index difference of the compensation pattern is greater than or equal to 0.08 and less than or equal to 0.

12.

10. The compensation film according to any one of claims 1 to 7, wherein: The material of the compensation film includes liquid crystal polymer.

11. A polarizer, comprising: Polarizing layer; and a first compensation film, wherein the first compensation film is the compensation film according to any one of claims 1 to 10, and the first compensation film is stacked on one side of the polarizing layer.

12. The polarizer according to claim 11, wherein: The polarizer also includes: The pressure-sensitive adhesive layer is arranged between the polarizing layer and the first compensation film, and includes a plurality of pressure-sensitive adhesive patterns. In the normal direction of the polarizer, the thicknesses of the overlapping pressure-sensitive adhesive patterns and the compensation patterns are complementary, so that the surface of the first compensation film away from the polarizing layer is roughly a plane.

13. A liquid crystal display panel, comprising a first compensation film, wherein the first compensation film is the compensation film according to any one of claims 1 to 10; in, The liquid crystal display panel includes sub-pixels of multiple colors, and in an orthographic projection on a plane where the liquid crystal display panel is located, sub-pixels of different colors overlap with compensation patterns of different types.

14. The liquid crystal display panel according to claim 13, wherein: The liquid crystal display panel further comprises: a first polarizer, an array substrate, a liquid crystal layer, a cell-aligning substrate and a polarizing layer which are sequentially stacked, wherein the first compensation film is located between the cell-aligning substrate and the polarizing layer.

15. A display device, comprising: The liquid crystal display panel according to claim 13 or 14; A backlight module, arranged on the light incident side of the liquid crystal display panel; as well as A driving component is connected to the liquid crystal display panel and is used to drive the liquid crystal display panel to display.

Images