Compensation film, polarizing plate, liquid crystal display panel, and display device

Abstract

Compensation films, polarizers, liquid crystal display panels, and display devices relate to the field of display technology. The compensation film includes multiple compensation units, each comprising various types of compensation patterns. Compensation patterns of the same type are used for phase compensation of incident light of the same color, while compensation patterns of different types are used for phase compensation of incident light of different colors. At least two types of compensation patterns have different thicknesses and / or biaxial refractive index differences.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a compensation film, a polarizer, a liquid crystal display panel, and a display device. Background Technology

[0002] With technological advancements and the continuous improvement of living standards, the market demands increasingly higher performance from displays, especially for high-performance products with high resolution, high refresh rate, and high contrast, as well as ever-increasing requirements for image quality. Summary of the Invention

[0003] This disclosure provides a compensation film including multiple compensation units, each compensation unit including multiple types of compensation patterns. Compensation patterns of the same type are used for phase compensation of incident light of the same color, and compensation patterns of different types are used for phase compensation of incident light of different colors. 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 is used for phase compensation of the first color light; and

[0006] The second compensation pattern is used for phase compensation of the second color light.

[0007] Wherein, 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 various types of compensation patterns include:

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

[0014] A green light compensation pattern is used for phase compensation of green light; and

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

[0016] Wherein, 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 thickness of the compensation pattern is 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 compensation film is made of a liquid crystal polymer.

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

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

[0022] A pressure-sensitive adhesive layer is disposed between the polarizing layer and the first compensation film, and includes multiple pressure-sensitive adhesive patterns. In the normal direction of the polarizer, the thickness of the overlapping pressure-sensitive adhesive patterns and the compensation patterns is complementary, so that the surface of the first compensation film facing away from the polarizing layer is approximately a plane.

[0023] This disclosure provides a liquid crystal display panel, including a first compensation film, wherein the first compensation film is the compensation film provided as in any embodiment;

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

[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 sequentially, wherein the first compensation film is located between the cell substrate and the polarizing layer.

[0026] This disclosure provides a display device, including:

[0027] As provided in any embodiment of the liquid crystal display panel;

[0028] A backlight module is disposed on the light-incident side of the liquid crystal display panel; and

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

[0030] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the scale in the drawings is for illustration only and does not represent the actual scale.

[0032] Figure 1 A cross-sectional structural schematic diagram of a liquid crystal display panel in the related art is shown as an example;

[0033] Figure 2 An exemplary illustration shows the side-view display effect of a liquid crystal display panel in the related art;

[0034] Figure 3 A cross-sectional structural schematic diagram of another liquid crystal display panel in the related art is shown as an example;

[0035] Figure 4 An exemplary diagram of a Poincaré sphere in another liquid crystal display panel of the related art is shown;

[0036] Figure 5 An exemplary view of the side-view display effect of another liquid crystal display panel in the related art is shown;

[0037] Figure 6An exemplary light leakage simulation diagram of another liquid crystal display panel in the related art is 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 shown by way of example;

[0039] Figure 8 An exemplary schematic diagram of a planar structure of a compensation membrane provided in this disclosure is shown;

[0040] Figure 9 A cross-sectional structural schematic diagram of a compensation membrane provided in this disclosure is shown as an example;

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

[0042] Figure 11 An exemplary diagram of a Poincaré sphere of a liquid crystal display panel provided in this disclosure is shown;

[0043] Figure 12 An exemplary light leakage simulation diagram of a liquid crystal display panel provided in this disclosure is shown;

[0044] Figure 13 Exemplary red light leakage brightness curves of two liquid crystal display panels at different azimuth angles with a viewing angle of 75° are shown;

[0045] Figure 14 An exemplary cross-sectional structural diagram of a polarizer provided in this disclosure is shown;

[0046] Figure 15 An exemplary schematic diagram of a planar structure of a liquid crystal display panel provided in this disclosure is shown;

[0047] Figure 16 A cross-sectional structural schematic diagram of a liquid crystal display panel provided in this disclosure is shown as an example. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] Reference Figure 1An exemplary cross-sectional structural diagram of a liquid crystal display panel in the related art is shown. For example... Figure 1 As shown, the liquid crystal display panel adopts Advanced Super Dimension Switch (ADS) technology, including an upper glass substrate 11 and a lower glass substrate 12 arranged opposite to each other, 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 outside of the upper glass substrate 11, and a lower polarizer 15 attached to the outside of the lower glass substrate 12 and perpendicular to the transmission axis angle of the upper polarizer 14. The upper polarizer 14 and the lower polarizer 15 perform the function of polarizing light, which can convert natural light into linearly polarized light. In the dark, light incident on the upper polarizer 14 after passing through the lower polarizer 15 and the liquid crystal layer 13 has a polarization state perpendicular to the transmission axis of the upper polarizer 14 at a normal viewing angle. Therefore, the normal viewing angle light can hardly pass through the upper polarizer 14. However, the polarization state of the oblique viewing angle light is not completely perpendicular to the transmission axis of the upper polarizer 14. The upper polarizer 14 cannot filter the non-perpendicular oblique viewing angle light, thus causing light leakage. This manifests as a white cast at large viewing angles. Figure 2 As shown, this significantly reduces the screen's image quality.

[0050] In related technologies, to improve the whitening effect at wide viewing angles, a compensation layer 31 is typically used to reduce light leakage at side viewing angles, such as... Figure 3 As shown, compensation layer 31 (as Figure 3 The A film + C film shown is located between the upper polarizer 14 and the upper glass substrate 11. The specific compensation principle is as follows: Figure 4 The Bonga sphere simulation diagram shown indicates that, in the off-axis state, the polarization state of the light completely absorbed by the upper polarizer 14 is point P. Without the compensation layer 31, the actual polarization state incident on the upper polarizer 14 is point O. This means that the polarization state of the light incident on the upper polarizer 14 is not perpendicular to its absorption axis, resulting in light leakage due to a component of light in the non-perpendicular direction. Figure 4 As shown, after adding the compensation layer 31, 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 them are closer to point P, so there is less light leakage, thereby improving the whitening at a wide viewing angle.

[0051] However, setting up compensation layer 31 can easily cause a reddish tint to the character when viewed from a large perspective, such as... Figure 5 As shown. The inventor is based on Figure 3 The compensation layer 31 scheme shown simulates the light leakage of three colors of light from different viewing angles under an L0 screen on a liquid crystal display panel, such as... Figure 6As shown, green light has the lowest light leakage brightness, while red light has the highest, indicating that green light has the best compensation effect. L0 light leakage is the smallest, while red light leakage is the most severe. A viewing angle of Theta 75° was selected to compare the light leakage brightness of Phi at different azimuth angles, as shown... Figure 7 As shown, at azimuth angles Phi of 225° and 315°, red light leakage is the most severe, while green light leakage is less at all azimuth angles, with leakage brightness values ​​all less than 100. Due to the different degrees of leakage among the three colors, color shift occurs, with red light exhibiting the greatest leakage brightness, as shown in the image. Figure 5 The color shown is reddish-purple.

[0052] The inventors analyzed the cause of the reddish color cast and found that it was due to inconsistent polarization state changes in the three primary colors R / G / B after passing through the compensation layer 31. Figure 4 Points Lr, Lg, and Lb are shown. Further analysis reveals that the change in the polarization state of the light is related to the phase difference or phase compensation value 2πΔn*d / λ, where Δn is the biaxial refractive index difference of the compensation layer 31, d is the film thickness of the compensation layer 31, and λ is the wavelength of the incident light. Because the wavelengths of the three primary colors R / G / B are different, the phase difference changes of the three primary colors differ even with the same 2πΔn*d, leading to differences in the polarization state changes.

[0053] Reference Figure 8 An exemplary schematic diagram of a planar structure of a compensation membrane provided in this disclosure is shown. Figure 9 An exemplary cross-sectional structural schematic diagram of a compensation membrane provided in this disclosure is shown, such as... Figure 8 and Figure 9 As shown, the compensation film array has multiple compensation units 81 arranged in a manner that includes various types of compensation patterns 08.

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

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

[0056] Among them, at least two types of compensation patterns 08 may include two types of compensation patterns 08, and may also include more types of compensation patterns 08, and may include up to all types of compensation patterns 08 in the compensation film.

[0057] For example, such as Figure 8 and Figure 9 As shown, each compensation unit 81 includes three types of compensation patterns 08. Therefore, at least two types of compensation patterns 08 can include two types of compensation patterns 08, or three types of compensation patterns 08. For example, two types of compensation patterns 08 can be red light compensation pattern 08R and green light compensation pattern 08G, or green light compensation pattern 08G and blue light compensation pattern 08B, or red light compensation pattern 08R and blue light compensation pattern 08B. Three types of compensation patterns 08 can be red light compensation pattern 08R, green light compensation pattern 08G, and blue light compensation pattern 08B.

[0058] Among them, differences in thickness and / or biaxial refractive index include: differences in thickness, differences in biaxial refractive index, or differences in both thickness and biaxial refractive index.

[0059] Since the change in polarization state of light is related to the phase difference 2πΔn*d / λ, by setting the thickness d and / or biaxial refractive index difference Δn of at least two types of compensation patterns 08 differently, the 2πΔn*d of at least two types of compensation patterns 08 is different. This can cancel or reduce the phase difference or phase compensation difference caused by the different wavelengths of incident light of different colors. This makes the polarization state change of incident light of different colors tend to be consistent after passing through their respective compensation patterns 08. Each pattern can independently improve the compensation effect of at least two different colors of incident light and improve the problem of the side view character being reddish.

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

[0061] For example, compensation patterns 08 of the same type can have approximately the same thickness and biaxial refractive index difference. This allows for the same phase compensation effect for incident light of the same color and simplifies the fabrication process.

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

[0063] For example, the two types of compensation patterns 08, red light compensation pattern 08R and blue light compensation pattern 08B, have different thicknesses and / or biaxial refractive index differences, while blue light compensation pattern 08B and green light compensation pattern 08G can have the same thickness and biaxial refractive index difference. This example can simultaneously improve the compensation effect of red light R and blue light B, improving the problem of reddish tint when viewing characters from the side. In addition, since blue light compensation pattern 08B and green light compensation pattern 08G have the same thickness and biaxial refractive index difference, they can be fabricated simultaneously, thereby simplifying the fabrication process.

[0064] For example, the two types of compensation patterns 08, green light compensation pattern 08G and blue light compensation pattern 08B, have different thicknesses and / or biaxial refractive index differences, while green light compensation pattern 08G and red light compensation pattern 08R can have the same thickness and biaxial refractive index difference. This example can simultaneously improve the compensation effect of green light G and blue light B. Furthermore, since green light compensation pattern 08G and red light compensation pattern 08R have the same thickness and biaxial refractive index difference, they can be fabricated simultaneously, thereby simplifying the fabrication process.

[0065] For example, the three types of compensation patterns 08—red light compensation pattern 08R, green light compensation pattern 08G, and blue light compensation pattern 08B—have different thicknesses and / or biaxial refractive index differences. This example can simultaneously improve the compensation effect of red light R, green light G, and blue light B, thus alleviating the problem of characters appearing reddish when viewed from the side.

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

[0067] In some embodiments, at least two types of compensation patterns 08 include: a first compensation pattern for phase compensation of a first color light; and a second compensation pattern for phase compensation of 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. This allows the side-view character deviation problem to be adjusted to a level almost imperceptible to the naked eye.

[0068] The phase compensation value ψ1 of the first compensation pattern for the first color light can be calculated using 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 ψ2 of the second compensation pattern for the second color light can be calculated using 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 ψ2 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] Wherein, the first compensation pattern and the second compensation pattern are any two types of compensation patterns 08 from at least two types of compensation patterns 08.

[0070] 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. This reduces the phase difference between the first and second color lights caused by the wavelength difference.

[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] 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 biaxial refractive index difference Δn1 of the first compensation pattern is greater than the biaxial refractive index difference Δn2 of the second compensation pattern. This reduces the phase difference between the first and second color lights caused by the wavelength difference.

[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 approximately equal to the ratio of the wavelength λ1 of the first color light to the wavelength λ2 of the second color light.

[0074] For example, the first compensation pattern and the second compensation pattern are any two of the following: red light compensation pattern 08R, green light compensation pattern 08G, and blue light compensation pattern 08B. In specific implementations, the first compensation pattern and the second compensation pattern can be combined in various ways, as illustrated below.

[0075] In some examples, such as Figure 8 and Figure 9 As shown in Figures a and b, at least two types of compensation patterns 08 include red light compensation pattern 08R and green light compensation pattern 08G. These two patterns have different thicknesses or biaxial refractive index differences. Specifically, the first compensation pattern is red light compensation pattern 08R, with red light R as the first color ray; the second compensation pattern is green light compensation pattern 08G, with green light G as the second color ray. By setting the ratio of the phase compensation value of red light compensation pattern 08R for red light R to the phase compensation value of green light compensation pattern 08G for green light G to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the reddish tint issue of side-view characters can be adjusted to a level almost imperceptible to the naked eye.

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

[0077] To reduce the phase difference between red ray R and green ray G, for example, as follows: Figure 9 As shown in Figure a, the thickness of the red light compensation pattern 08R is greater than the thickness of the green light compensation pattern 08G. This reduces the phase difference between the red light R and the green light G due to their different wavelengths, thus improving the reddish color cast.

[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] To reduce the phase difference between red light R and green light G, for example, the biaxial refractive index difference of the red light compensation pattern 08R is greater than that of the green light compensation pattern 08G. This reduces the phase difference between red light R and green light G caused by wavelength differences, thus improving the reddish color shift.

[0080] Furthermore, such as Figure 9 As shown in Figure b, the thickness of the red light compensation pattern 08R is the same as that of the green light compensation pattern 08G. 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 Figure 9 As shown in Figures a and b, at least two types of compensation patterns 08 include red light compensation pattern 08R and blue light compensation pattern 08B. These two patterns have different thicknesses or biaxial refractive index differences. Specifically, the first compensation pattern is red light compensation pattern 08R, with red light R as the first color ray; the second compensation pattern is blue light compensation pattern 08B, with blue light B as the second color ray. By setting the ratio of the phase compensation value of red light compensation pattern 08R for red light R to the phase compensation value of blue light compensation pattern 08B for blue light B to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the reddish tint issue of characters viewed from the side can be adjusted to a level almost imperceptible to the naked eye.

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

[0083] To reduce the phase difference between red ray R and blue ray B, for example, as follows: Figure 9 As shown in Figure a, the thickness of the red light compensation pattern 08R is greater than the thickness of the blue light compensation pattern 08B. This reduces the phase difference between the red light R and the blue light B due to their different wavelengths, thus improving the reddish color cast.

[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 ray R to the wavelength of the blue light ray B.

[0085] To reduce the phase difference between red light R and blue light B, for example, the biaxial refractive index difference of the red light compensation pattern 08R is greater than that of the blue light compensation pattern 08B. This reduces the phase difference between red light R and blue light B caused by wavelength differences, thus improving the reddish color shift.

[0086] Furthermore, such as Figure 9 As shown in Figure b, the thickness of the red light compensation pattern 08R is the same as that of the blue light compensation pattern 08B. 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 approximately 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 Figure 9 As shown in Figures c and b, at least two types of compensation patterns 08 include a green light compensation pattern 08G and a blue light compensation pattern 08B. The green light compensation pattern 08G and the blue light compensation pattern 08B have different thicknesses or biaxial refractive index differences. Specifically, the first compensation pattern is the green light compensation pattern 08G, and the first color ray is green ray G; the second compensation pattern is the blue light compensation pattern 08B, and the second color ray is blue ray B. By setting the ratio of the phase compensation value of the green light compensation pattern 08G for the green ray G to the phase compensation value of the blue light compensation pattern 08B for the blue ray B to be greater than or equal to 0.8 and less than or equal to 1.25 or 1.2, the side-view character deviation problem can be adjusted to a level almost imperceptible to the naked eye.

[0088] For example, such as Figure 9 As shown in Figures c and b, the thickness of the green light compensation pattern 08G can be the same as the thickness of the red light compensation pattern 08R, and the biaxial refractive index difference of the red light compensation pattern 08R can be the same as the biaxial refractive index difference of the green light compensation pattern 08G.

[0089] To reduce the phase difference between green ray G and blue ray B, for example, as follows: Figure 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. This reduces the phase difference between the green light G and the blue light B due to their different wavelengths, thus improving the color shift phenomenon.

[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 ray G to the wavelength of the blue light ray B.

[0091] To reduce the phase difference between green light G and blue light B, for example, the biaxial refractive index difference of the green light compensation pattern 08G is greater than that of the blue light compensation pattern 08B. This reduces the phase difference between green light G and blue light B caused by their wavelength difference, thus improving color shift.

[0092] Furthermore, such as Figure 9 As shown in Figure b, the thickness of the green light compensation pattern 08G is the same as that of the blue light compensation pattern 08B. 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 ray G to the wavelength of the blue light ray B.

[0093] In other examples, such as Figure 8 and Figure 9 As shown in Figures d and b, at least two types of compensation patterns 08 include three types: red light compensation pattern 08R, green light compensation pattern 08G, and blue light compensation pattern 08B. These three patterns have different thicknesses or biaxial refractive index differences. Specifically, if the first compensation pattern is red light compensation pattern 08R, then the second compensation pattern is either green light compensation pattern 08G or blue light compensation pattern 08B; if the first compensation pattern is green light compensation pattern 08G, then the second compensation pattern is blue light compensation pattern 08B. This example can reduce the phase difference caused by wavelength differences in red light R, green light G, and blue light B, thereby adjusting the side-view character deviation problem to a level almost invisible to the naked eye.

[0094] To reduce the phase difference between red ray R, green ray G, and blue ray B, for example, as follows: Figure 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. This reduces the phase difference caused by the wavelength differences among the red light (R), green light (G), and blue light (B), thus improving the reddish color cast.

[0095] Furthermore, 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. 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. Moreover, 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] To reduce the phase difference between red light R, green light G, and blue light B, for example, the biaxial refractive index difference of the red light compensation pattern 08R is greater than that of the green light compensation pattern 08G, and the biaxial refractive index difference of the green light compensation pattern 08G is greater than that of the blue light compensation pattern 08B. In this way, the phase difference caused by the wavelength difference between red light R, green light G, and blue light B can be reduced, and the reddish color shift phenomenon can be improved.

[0097] Furthermore, such as Figure 9 As shown in Figure b, the red light compensation pattern 08R, the green light compensation pattern 08G, and the blue light compensation pattern 08B have the same thickness. 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 ray R to the wavelength of the green light ray G. Furthermore, 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 ray G to the wavelength of the blue light ray B.

[0098] For example, the wavelengths of red light R, green light G, and blue light B are the standard wavelengths of the three primary colors.

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

[0100] Reference Figure 11 The diagram shows that after the thickness of the red light compensation pattern 08R is increased 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 Figure 12 The diagram illustrates simulated light leakage of the red light R on the display panel under L0 screen conditions at different viewing angles. The left image shows the thickness of the red light compensation pattern 08R, which is 0.69 μm, while the right image shows a thickness of 1 μm. Figure 12 It can be observed that after the thickness of the red light compensation pattern 08R is increased to 1μm, the light leakage brightness of the red light R at azimuth angles Phi of 45° and 135° is greatly reduced, almost to the point of zero leakage. Furthermore, the light leakage at the two most severe azimuth angles Phi of 225° and 315° in the left image is also reduced. Selecting a viewing angle Theta 75°, the light leakage brightness at different azimuth angles Phi is compared, as shown... Figure 13 As shown, after the thickness of the red light compensation pattern 08R is increased to 1μm, the red light leakage is reduced, thus greatly improving the problem of reddish color deviation.

[0102] In some implementations, 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] For example, 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 implementations, 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] For example, 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 to ordinary photoelectric liquid crystal molecules, liquid crystal polymers, in addition to having liquid crystal molecules, also possess one or more reactive functional groups at the ends of the liquid crystal molecules. This combination can be photopolymerized into a polymer network, thus forming a liquid crystal polymer. Since the polymerization initiators used are mostly UV-sensitive (sensing wavelength 254nm–365nm), liquid crystal polymers are also called UV-reactive liquid crystals. The liquid crystal molecules can be, for example, rod-shaped or disc-shaped.

[0108] It should be noted that the compensation film can also be a polymer-stretched film, which is formed by stretching polymers uniaxially or biaxially. Stretching can deflect the originally randomly arranged isotropic molecular axes to anisotropic ones, thereby creating differences in the travel speed of incident light from different directions, thus adjusting or compensating for the phase of the light.

[0109] Because the biaxial refractive index difference of liquid crystal polymers is ten to a hundred times greater than that of polymer stretched films, compensation films made from liquid crystal polymers are thinner, making them ideal for roll-to-roll coating processes and contributing to the reduction of display panel thickness. Furthermore, at the same thickness, compensation films made from liquid crystal polymers can achieve better compensation effects.

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

[0111] For example, 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, and this disclosure is not limited thereto. In specific implementations, appropriate film layers can be selected according to the refractive index and uniaxial / biaxial requirements.

[0112] This disclosure provides a polarizer, such as Figure 14 As shown, the polarizer includes: a polarizing layer 141; and a first compensation film 142, wherein the first compensation film 142 is a compensation film provided as 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 will understand that the polarizer provided in this disclosure has the advantages of the aforementioned compensation film.

[0114] In some implementations, such as Figure 14 As shown, the polarizer also includes a pressure-sensitive adhesive layer 143, disposed between the polarizer layer 141 and the first compensation film 142. This layer includes multiple pressure-sensitive adhesive patterns (PSA). On the normal direction f1 of the polarizer, the overlapping PSA patterns and the compensation patterns (PSA and compensation patterns) have complementary thicknesses, so that the surface of the first compensation film 142 facing away from the polarizer layer 141 is approximately a single plane. Here, "overlapping" refers to the overlapping of their orthographic projections on the normal direction f1 of the polarizer, that is, the overlapping of their orthographic projections on the plane of the polarizer.

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

[0116] For example, by providing 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 can be approximately the same at different positions.

[0118] For example, such as Figure 14 As shown, the thickness of the red light compensation pattern 08R is greater than the thickness of the green light compensation pattern 08G. In order to make the surface of the first compensation film 142 away from the polarizing layer 141 flat, the thickness of the pressure-sensitive adhesive pattern PSA overlapping with the red light compensation pattern 08R in the normal direction f1 of the polarizer 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 in thickness between the red light compensation pattern 08R and the green light compensation pattern 08G.

[0119] For example, such as Figure 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 away from the polarizing layer 141 flat, the thickness of the pressure-sensitive adhesive pattern PSA overlapping the green light compensation pattern 08G in the normal direction f1 of the polarizer is equal to the thickness of the pressure-sensitive adhesive pattern PSA overlapping the blue light compensation pattern 08B.

[0120] For example, 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 away from the polarizing layer 141 flat, the thickness of the pressure-sensitive adhesive pattern PSA overlapping the green light compensation pattern 08G in the normal direction f1 of the polarizer is less than the thickness of the pressure-sensitive adhesive pattern PSA overlapping the blue light compensation pattern 08B, and the difference between the two is approximately equal to the difference in thickness between the green light compensation pattern 08G and the blue light compensation pattern 08B.

[0121] For example, such as Figure 14 As shown, the polarizer may further include a second compensation film 144, located on the side of the first compensation film 142 opposite to the polarizing layer 141. This 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 is a positive C film, and the second compensation film 144 is a positive A film. Attaching this polarizer to the surface of the display panel can reduce light leakage from the side viewing angle, effectively improving issues such as halo, black level rise from the side viewing angle, and color fading. If the display panel uses negative liquid crystal, it can further improve the problem of light leakage and whitening at large viewing angles, increase contrast, and make the image quality of the liquid crystal display panel comparable to that of an organic light-emitting diode (OLED) display panel.

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

[0124] For example, the second compensation membrane 144 can be a polymeric stretch membrane, and the material may include polyvinyl alcohol, etc., which are not limited in this disclosure.

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

[0126] Those skilled in the art will understand that the liquid crystal display panel provided in this disclosure has the advantages of the aforementioned compensation film.

[0127] For example, such as Figure 16As shown, the multiple color sub-pixels P 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 onto the plane of the liquid crystal display panel, 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 implementations, such as Figure 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 sequentially. The array substrate 162, the liquid crystal layer 163, and the cell substrate 164 form a liquid crystal cell.

[0129] Exemplarily, the first compensation membrane 142 may be disposed outside the box. For example, as Figure 16 As shown, the first compensation film 142 is located between the 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, such as Figure 15 As shown, the edge of the first polarizer POL1 is recessed relative to the edge of the second polarizer POL2.

[0131] Considering factors such as bonding accuracy and process deviation, the edge of the second polarizer POL2 can be recessed or expanded relative to the edge of the substrate 164. For frameless products, the expansion dimension can be, for example, 0.2mm.

[0132] For example, the first compensation film 142 may also be disposed inside the cell, for example, between the array substrate 162 and the liquid crystal layer 163, or between the liquid crystal layer 163 and the cell substrate 164, which is not limited in this disclosure.

[0133] This disclosure provides a display device, including: a liquid crystal display panel as provided in any embodiment; a backlight module disposed 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 perform display.

[0134] Those skilled in the art will understand that the display device provided in this disclosure has the advantages of the aforementioned compensation film.

[0135] The display device disclosed herein can be any product or component with display function, such as a display module, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, in-vehicle display device, smartwatch, fitness wristband, personal digital assistant, etc.

[0136] In this disclosure, "multiple" means two or more, and "at least one" means one or more, unless otherwise expressly and specifically defined.

[0137] In this disclosure, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this disclosure.

[0138] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

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

[0140] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0141] In describing some embodiments, the terms "coupled" and "connected" may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content 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", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations 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, depending on the context, the term “if” may optionally be interpreted as meaning “when”, “in the event of”, “in response to determination”, or “in response to detection”. Similarly, depending on the context, the phrase “if it is determined that…” or “if [the stated condition or event] is detected” may optionally be interpreted as meaning “in the event of determination that…”, “in response to determination that…”, “when [the stated condition or event] is detected”, or “in response to the detection of [the stated condition or event]”.

[0145] The use of “for” or “configured to” in this article implies an open and inclusive language that does not preclude the applicability to or configuration of devices to perform additional tasks or steps.

[0146] The use of "based on" or "according to" in this document implies openness and inclusiveness. A process, step, calculation, or other action based on one or more of the stated conditions or values ​​may, in practice, be based on other conditions or values ​​beyond those stated.

[0147] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0148] As used herein, “parallel,” “perpendicular,” “equal,” and “flush” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error 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, where the acceptable range of deviation for approximate parallelism can be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where the acceptable range of deviation for approximate perpendicularity can also be, for example, within 5°. “Equal” includes absolute equality and approximate equality, where the acceptable range of deviation for approximate equality can be, for example, the difference between the two equals being less than or equal to 5% of either one. “Flush” includes absolute flush and approximate flush, where the acceptable range of deviation for approximate flush can be, for example, the distance between the flush twos being less than or equal to 5% of either one of the dimensions.

[0149] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0150] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments. Unless otherwise specified, film thickness refers to the dimension of the film layer in its normal direction.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A compensation film, comprising a plurality of compensation units, the compensation units comprising a plurality of types of compensation patterns, the same type of compensation pattern being used for phase compensation of incident light rays of the same color, and different types of compensation patterns being used for phase compensation of incident light rays of different colors, wherein, The at least two types of compensation patterns have different thicknesses and / or biaxial refractive index differences; The at least two types of compensation patterns include: a first compensation pattern for phase compensation of first color light; and a second compensation pattern for phase compensation of 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.

2. The compensation film of claim 1, wherein, The thickness of the first compensation pattern is greater than the thickness of the second compensation pattern.

3. The compensation film of claim 2, wherein, The biaxial refractive index difference of the first compensation pattern is the same as the biaxial refractive index difference of the second compensation pattern, 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.

4. The compensation film of claim 1, wherein, The biaxial refractive index difference of the first compensation pattern is greater than the biaxial refractive index difference of the second compensation pattern.

5. The compensation film according to claim 4, wherein, The thickness of the first compensation pattern is the same as the thickness of the second compensation pattern, 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.

6. The compensation film of claim 1, wherein, The plurality of types of compensation patterns include: a red light compensation pattern for phase compensation of red light; a green light compensation pattern for phase compensation of green light; and a blue light compensation pattern 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.

7. The compensation film according to any one of claims 1 to 6, wherein The thickness of the compensation pattern is greater than or equal to 0.1 microns and less than or equal to 10 microns.

8. The compensation film according to any one of claims 1 to 6, 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.

9. The compensating film according to any one of claims 1 to 6, wherein, The material of the compensation film includes liquid crystal polymer.

10. A polarizing sheet comprising: a polarizing layer; and a first compensation film, which is the compensation film according to any one of claims 1 to 9, is arranged on one side of the polarizing layer.

11. The polarizing sheet according to claim 10, wherein The polarizing sheet further includes: a pressure sensitive adhesive layer arranged between the polarizing layer and the first compensation film, including a plurality of pressure sensitive adhesive patterns, in the normal direction of the polarizing sheet, the thicknesses of the pressure sensitive adhesive patterns and the compensation patterns that overlap each other are complementary, so that the surface of the first compensation film away from the polarizing layer is substantially a plane.

12. A liquid crystal display panel including a first compensation film, which is the compensation film according to any one of claims 1 to 9; wherein The liquid crystal display panel includes a plurality of color sub-pixels, and in the orthographic projection on the plane where the liquid crystal display panel is located, different color sub-pixels overlap different types of compensation patterns.

13. The liquid crystal display panel according to claim 12, wherein, The liquid crystal display panel further comprises a first polarizer, an array substrate, a liquid crystal layer, a cell substrate and a polarizing layer which are sequentially stacked, wherein the first compensation film is located between the cell substrate and the polarizing layer.

14. A display device comprising: the liquid crystal display panel according to claim 12 or 13; a backlight module arranged at an incident light side of the liquid crystal display panel; and a driving assembly connected with the liquid crystal display panel and configured to drive the liquid crystal display panel to display.

Images