CN113514984A - Liquid crystal display panel, preparation method thereof and display device - Google Patents

Abstract

The disclosure provides a liquid crystal display panel, a preparation method thereof and a display device, relates to the technical field of display, and can solve the problems of color cast and light leakage of the liquid crystal display panel. The liquid crystal display panel in the present disclosure includes a first substrate, a second substrate, and a liquid crystal layer; the liquid crystal layer comprises a first alignment film, a second alignment film and a second liquid crystal molecular layer; the first alignment film is configured to enable a part of the second liquid crystal molecules close to the first alignment film to generate a first pretilt angle; the second alignment film is configured to enable a part of the second liquid crystal molecules close to the second alignment film to generate a second pretilt angle; the direction of the first pretilt is opposite or substantially opposite to the direction of the second pretilt. An optical compensation layer including a third alignment film and a first liquid crystal molecular layer; the third alignment film is configured to enable the first liquid crystal molecules close to the third alignment film to generate a third pretilt angle; the direction of the third pretilt is the same as or substantially the same as the direction of the first pretilt or the direction of the second pretilt.

Description

Liquid crystal display panel, preparation method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a liquid crystal display panel, a preparation method thereof and a display device.

Background

Liquid Crystal displays (LCDs for short) have the characteristics of small size, low power consumption, no radiation and the like, and occupy a leading position in the current Display market. The liquid crystal display panel mainly includes a Color Filter (CF) substrate, an Array substrate, and a liquid crystal layer disposed between the Color Filter substrate and the Array substrate.

Disclosure of Invention

The embodiment of the invention provides a liquid crystal display panel, a preparation method thereof and a display device, which can improve the problems of color cast and light leakage of the liquid crystal display panel.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in one aspect, there is provided a liquid crystal display panel including: the first substrate base plate and the second substrate base plate are arranged oppositely.

A liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer comprises a first alignment film and a second alignment film which are oppositely arranged, and a second liquid crystal molecular layer positioned between the first alignment film and the second alignment film; the first alignment film is configured to anchor a part of second liquid crystal molecules close to the first alignment film in the second liquid crystal molecule layer, so that a first pretilt angle is generated on the part of the second liquid crystal molecules close to the first alignment film; the second alignment film is configured to anchor a part of the second liquid crystal molecules close to the second liquid crystal molecule layer, so that a second pretilt angle is generated on the part of the second liquid crystal molecules close to the second alignment film; the direction of the first pretilt is opposite or substantially opposite to the direction of the second pretilt.

The optical compensation layer is arranged on one side, away from the second liquid crystal molecular layer, of the first alignment film or the second alignment film; the optical compensation layer comprises a third alignment film and a first liquid crystal molecular layer; the third alignment film is configured to anchor the first liquid crystal molecules close to the third alignment film in the first liquid crystal molecular layer, so that the first liquid crystal molecules close to the third alignment film generate a third pretilt angle; the direction of the third pretilt is the same as or substantially the same as the direction of the first pretilt or the direction of the second pretilt.

Optionally, an orthogonal projection direction of a long axis of the first liquid crystal molecule on a plane of the first alignment film and an orthogonal projection direction of a long axis of the second liquid crystal molecule on a plane of the third alignment film are parallel or substantially parallel.

Optionally, the alignment direction of the first alignment film, the alignment direction of the second alignment film, and the alignment direction of the third alignment film are the same.

Optionally, the sum of the phase retardation of the optical compensation layer and the phase retardation of the liquid crystal layer is equal to a positive integer multiple of the first wavelength; the first wavelength is in the range of 535nm + -50 nm.

Optionally, the phase retardation of the optical compensation layer is in a range of 185nm ± 25 nm; the phase retardation range of the liquid crystal layer is 350nm +/-25 nm.

Optionally, the third alignment film is disposed on a side of the first substrate close to the liquid crystal layer.

Or the third alignment film is arranged on one side of the first substrate far away from the liquid crystal layer.

Or the third alignment film is arranged on one side of the second substrate close to the liquid crystal layer.

Or the third alignment film is arranged on one side of the second substrate base plate far away from the liquid crystal layer.

Optionally, the optical compensation layer further includes a third substrate, and the third substrate and the third alignment film are located on the same side or opposite sides of the first liquid crystal molecular layer.

Optionally, the third alignment film and the second alignment film are disposed on two opposite sides of the third substrate base plate.

Optionally, the optical compensation layer further includes a fourth alignment film, and the fourth alignment film is disposed on one side of the third substrate far away from the liquid crystal layer or one side of the second substrate close to the liquid crystal layer; the fourth alignment film is configured to anchor a part of the first liquid crystal molecules close to the fourth alignment film in the first liquid crystal molecule layer, so that a fourth pretilt angle is generated on the part of the first liquid crystal molecules close to the fourth alignment film; the direction of the fourth pretilt is opposite or substantially opposite to the direction of the third pretilt.

Optionally, the fourth alignment film and the second alignment film are disposed on two opposite sides of the third substrate.

Optionally, the third alignment film is disposed on one side of the second substrate close to the liquid crystal layer, the first liquid crystal layer is further disposed on one side of the liquid crystal layer, and the second alignment film is disposed on one side of the liquid crystal layer close to the flat layer.

Optionally, the optical compensation layer is a + a compensation film layer.

Optionally, the first, second and third pretilt angles are equal or substantially equal.

Optionally, the first, second and third pretilt angles are in a range of 2 ° ± 2 °.

Optionally, the first, second and third pretilt angles are in a range of 2 ° ± 1 °.

Optionally, a functional film layer is further disposed on the first substrate base plate; the optical compensation layer is arranged on one side of the functional film layer close to the liquid crystal layer.

In still another aspect, a display device is provided, which includes the liquid crystal display panel as described above.

In another aspect, a method for manufacturing a liquid crystal display panel is provided, including: a first alignment film is formed on one side of a first base substrate.

And a third alignment film on one side of the second substrate base plate.

And forming a first liquid crystal molecular layer on the third alignment film and curing, wherein the first liquid crystal molecules have a third pretilt angle.

A second alignment film is formed on the first liquid crystal molecular layer.

Aligning the first substrate base plate on which the first alignment film is formed and the second substrate base plate on which the second alignment film is formed, and forming a second liquid crystal molecular layer between the first alignment film and the second alignment film; and the second liquid crystal molecules in the second liquid crystal molecule layer close to the first alignment film have a first pretilt angle, and the second liquid crystal molecules in the second liquid crystal molecule layer close to the second alignment film have a second pretilt angle.

The first pretilt is in a direction opposite or substantially opposite to the second pretilt, and the third pretilt is in a direction the same as or substantially the same as the direction of the first pretilt or the direction of the second pretilt.

Optionally, before forming the second alignment film on the first liquid crystal molecular layer, the preparation method further includes: a planarization layer is formed on the first liquid crystal molecular layer.

The disclosure provides a liquid crystal display panel, a preparation method thereof and a display device. The liquid crystal display panel comprises a liquid crystal layer and an optical compensation layer, wherein a part of second liquid crystal molecules in the liquid crystal layer have a first pretilt angle alpha, a part of the second liquid crystal molecules in the liquid crystal layer have a second pretilt angle beta, and the direction of the first pretilt angle alpha is opposite to or approximately opposite to that of the second pretilt angle beta; the second liquid crystal molecules in the optical compensation layer have a third pretilt angle γ, and the direction of the third pretilt angle γ is the same as or substantially the same as the direction of the first pretilt angle α or the direction of the second pretilt angle β. Since the third pretilt angle γ is the same or substantially the same as the first pretilt angle α or the second pretilt angle β, the optical compensation layer can compensate for the change in the polarization state of the light due to the liquid crystal layer, so that the light emitted from the optical compensation layer is still linearly polarized, thereby improving the light leakage and color shift of the liquid crystal display panel in the L0 state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1a is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the disclosure;

fig. 1b to fig. 1g are schematic structural diagrams of another liquid crystal display panel provided in the embodiment of the present disclosure;

fig. 2a to fig. 2c are schematic structural diagrams of an alignment film according to an embodiment of the disclosure;

FIG. 3a is a schematic diagram of a related art LCD panel;

FIG. 3b is a schematic diagram illustrating the polarization states of a light ray passing through layers of a liquid crystal display panel in a Pongall diagram according to the related art;

FIG. 4 is a schematic diagram illustrating the position of the polarization state of a light ray passing through each layer in the Poincall diagram according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram illustrating a polarization angle-luminance curve of a liquid crystal display panel according to an embodiment of the present disclosure and a schematic diagram illustrating a polarization angle-luminance curve of a liquid crystal display panel according to the related art in comparison;

fig. 6a to fig. 6e are schematic structural diagrams of another liquid crystal display panel provided in the embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another lcd panel according to an embodiment of the present disclosure;

fig. 8a to 8b are schematic structural diagrams of another lcd panel according to an embodiment of the disclosure;

fig. 9a to 9b are schematic structural diagrams of another lcd panel provided in the embodiments of the present disclosure;

fig. 10 is a schematic flow chart illustrating a method for manufacturing a liquid crystal display panel according to an embodiment of the present disclosure.

Reference numerals:

1-a liquid crystal display panel; 11-a first substrate base plate; 12-a second substrate base plate; 13-a third substrate base; 14-a liquid crystal layer; 140-a second layer of liquid crystal molecules; 140' -second liquid crystal molecules; 141-a first alignment film; 142-a second alignment film; 15-an optical compensation layer; 150-a first layer of liquid crystal molecules; 150' -first liquid crystal molecules; 151-third alignment film; 152-a fourth alignment film; 16-a planar layer; 17-a functional film layer; 170-thin film transistor layer; 171-data lines; 172-a first insulating layer; 173-common electrode layer; 174-a second insulating layer; 175-pixel electrode layer; 176-a third insulating layer; 18-a first polarizer; 19-a second polarizer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

The present disclosure provides a display device, for example, a display device using an ADS (Advanced Super Dimension Switch) mode. The display device comprises a liquid crystal display panel and a backlight module, wherein the backlight module is used for providing a light source for displaying for the liquid crystal display panel.

Referring to fig. 1a to 1g, the present disclosure provides a liquid crystal display panel 1 including: a first substrate base plate 11 and a second substrate base plate 12 which are disposed oppositely. The materials of the first substrate board 11 and the second substrate board 12 are, for example, the same, for example, both are glass, but may be different, and the disclosure is not limited thereto.

And a liquid crystal layer 14 disposed between the first substrate 11 and the second substrate 12. The liquid crystal layer 14 includes a first alignment film 141 and a second alignment film 142 that are oppositely disposed, and a second liquid crystal molecule layer 140 between the first alignment film 141 and the second alignment film 142. The first alignment film 141 is configured to anchor a portion of the second liquid crystal molecules 140 'close to the first alignment film 141 in the second liquid crystal molecule layer 140, so that the portion of the second liquid crystal molecules 140' close to the first alignment film 141 generates a first pretilt angle α; the second alignment film 142 is configured to anchor a portion of the second liquid crystal molecules 140 'close to the second liquid crystal molecule layer 140, so that the portion of the second liquid crystal molecules 140' close to the second alignment film 142 generates a second pretilt angle β; the first pretilt α is in a direction opposite or substantially opposite to the second pretilt β.

Referring to fig. 1a to 1g, the portion of the second liquid crystal molecules 140 'close to the first alignment film 141 is exemplified by a layer of the second liquid crystal molecules 140' closest to the first alignment film 141; the portion of the second liquid crystal molecules 140' adjacent to the second alignment film 142 is the layer of liquid crystal molecules closest to the second alignment film 142.

As a schematic, only the second liquid crystal molecules 140 'closest to the first alignment film 141 and the second liquid crystal molecules 140' closest to the first alignment film 142 in the second liquid crystal molecule layer 140 are shown in fig. 1a to 1 g.

The optical compensation layer 15 is disposed on a side of the first alignment film 141 or the second alignment film 142 away from the second liquid crystal molecule layer 140; the optical compensation layer 15 includes a third alignment film 151 and a first liquid crystal molecular layer 150. The third alignment film 151 is configured to anchor the first liquid crystal molecules 150 'close to the third alignment film 151 in the first liquid crystal molecule layer 150, so that the first liquid crystal molecules 150' close to the third alignment film 151 generate a third pretilt angle γ; the direction of the third pretilt γ is the same as or substantially the same as the direction of the first pretilt α or the direction of the second pretilt β.

Illustratively, the first liquid crystal molecules 150' closest to the third alignment film 151 in the first liquid crystal molecule layer 150 are one layer.

As a schematic, only the first liquid crystal molecules 150' closest to the third alignment film 151 among the first liquid crystal molecule layers 150 are drawn in fig. 1a to 1 g.

The liquid crystal molecules are classified into rod-shaped (rod-type) liquid crystal molecules in which the long axis direction is the optical axis direction and discotic (discotic) liquid crystal molecules in which the short axis direction is the optical axis direction, according to their shapes. In the three-dimensional coordinate system, a material in which at least two of refractive indices nx, ny, and nz in three directions of an X axis, a Y axis, and a Z axis are different is called a birefringent material, and liquid crystal molecules are all birefringent materials. In some embodiments, the first liquid crystal molecules 150 'in the first liquid crystal molecule layer 15 and the second liquid crystal molecules 140' in the second liquid crystal molecule layer 140 are, for example, both rod-shaped liquid crystal molecules. In other embodiments, the first liquid crystal molecules 150 'and the second liquid crystal molecules 140' may also be both positive liquid crystal molecules.

The pretilt angle may cause the liquid crystal molecules to be in a pretilt state, which means that the liquid crystal molecules near the alignment film are tilted in a specific direction with respect to a plane in which the alignment film is located. In some embodiments of the disclosure, the pretilt angle refers to an angle formed between a long axis of the rod-shaped liquid crystal molecules and a plane where the alignment film is located, and the plane where the long axis of the rod-shaped liquid crystal molecules is located intersects with the plane where the alignment film is located. The pretilt angles of the first liquid crystal molecules 150 'and the second liquid crystal molecules 140' are the states that the first liquid crystal molecules 150 'and the second liquid crystal molecules 140' are in when the liquid crystal display panel 1 is not powered on or the voltage between the pixel electrode and the common electrode is 0.

The alignment film is made of a polymer material, such as Polyimide (PI). The alignment film can make the liquid crystal molecules generate a pre-tilt angle, which is an acute angle between the long axis of the liquid crystal molecules and the plane where the alignment film anchoring the liquid crystal molecules is located.

The direction of the first pretilt α is opposite or substantially opposite to the direction of the second pretilt β, which means that the direction of the first pretilt α and the direction of the second pretilt β are opposite or substantially opposite with respect to the same substrate board, for example, with respect to the first substrate board 11, that is, the long axis direction of the second liquid crystal molecules 140 'having a pretilt equal to the first pretilt α and the long axis direction of the second liquid crystal molecules 140' having a pretilt equal to the second pretilt β are opposite or substantially opposite with respect to the first substrate board 11. Illustratively, referring to fig. 1a, with respect to the first substrate board 11, the direction of the first pretilt α is along the a-line direction, and the directions of the second pretilt β and the third pretilt γ are both along the B-line direction or substantially both along the B-line direction; an included angle a between the straight line A and the first substrate base plate 11, an included angle B between the straight line B and the first substrate base plate 11, and when the direction of the first pretilt angle alpha is opposite to the direction of the second pretilt angle beta, the included angle a and the included angle B are complementary; when the first pretilt α is in a direction substantially opposite to the second pretilt β, the sum of the included angle a and the included angle b is approximately equal to 180 °, i.e., the sum of the included angle a and the included angle b is equal to 180 ° within an allowable error range, illustratively, the sum of the included angle a and the included angle b is equal to 179.5 °, the allowable error range being obtained by presetting, illustratively, the error range is ± 1 °.

The direction of the third pretilt γ is the same as the direction of the first pretilt α or the direction of the second pretilt β, which means that the direction of the third pretilt γ is the same as or substantially the same as the direction of the first pretilt α or the direction of the second pretilt β with respect to the same substrate, for example, with respect to the first substrate 11, that is, the long axis direction of the first liquid crystal molecule 150 ' is the same as the long axis direction of the second liquid crystal molecule 140 ' having a pretilt equal to the first pretilt α or the long axis direction of the second liquid crystal molecule 140 ' having a pretilt equal to the second pretilt β with respect to the first substrate 11. Illustratively, referring to fig. 1a, with respect to the first substrate base plate 11, the third pretilt γ is directed in or substantially in the B-line direction, the first pretilt α is directed in the a-line direction, and the second pretilt β is directed in the B-line direction; the angle between the B-line direction and the first substrate 11 is B, the angle between the a-line direction and the first substrate 11 is a, and at this time, the direction of the third pretilt angle γ is the same as or substantially the same as the direction of the second pretilt angle β. When the direction of the third pretilt angle gamma is the same as the direction of the second pretilt angle beta, the magnitude of the third pretilt angle gamma is equal to the magnitude of the second pretilt angle beta; when the direction of the third pretilt γ is substantially the same as the direction of the second pretilt β, the difference between the third pretilt γ and the second pretilt β floats within an error allowance range; the error allowance range may be obtained by presetting, for example, the difference between the third pretilt angle γ and the second pretilt angle β is within an error range of ± 0.5 °.

By way of further example, referring to fig. 1B, with respect to the first substrate base plate 11, the direction of the third pretilt angle γ is along or substantially along the a-line direction, the direction of the first pretilt angle α is along the a-line direction, and the direction of the second pretilt angle β is along the B-line direction; the angle between the linear direction a and the first substrate 11 is a, the angle between the linear direction B and the first substrate 11 is B, and the third pretilt angle γ is the same or substantially the same as the first pretilt angle α. When the direction of the third pretilt angle gamma is the same as the direction of the first pretilt angle alpha, the magnitude of the third pretilt angle gamma is equal to the magnitude of the first pretilt angle alpha; when the direction of the third pretilt γ is substantially the same as the direction of the first pretilt α, the difference between the third pretilt γ and the first pretilt α floats within an error allowance range, which can be obtained by presetting, for example, the difference between the third pretilt γ and the first pretilt α floats within an error range of ± 0.5 °.

The direction and magnitude of the first pretilt α are determined by the first alignment film 141, the direction and magnitude of the second pretilt β are determined by the second alignment film 142, and the direction and magnitude of the third pretilt γ are determined by the third alignment film 151. The first alignment film 141, the second alignment film 142, and the third alignment film 151 may be formed, for example, by a Rubbing process.

Referring to fig. 2a and 2b, during the Rubbing process, an angle formed on the upper surface (i.e., the surface close to the second liquid crystal molecules 140 ') of the alignment film is inclined upward (i.e., inclined toward the second liquid crystal molecules 140 ') relative to the lower surface (i.e., the surface away from the second liquid crystal molecules 140 '). For example, referring to fig. 2a and 2b, when Rubbing is performed from left to right, the right end of the alignment direction of the alignment films (including the first alignment film 141 and the second alignment film 142) may form an angle inclined upward to the right or downward to the right. Although the directions of the first pretilt α and the second pretilt β are different, the first alignment film 141 and the second alignment film 142 may be actually manufactured through the same process. In the manufacturing process, the state of the first alignment film 141 is as shown in fig. 2a, but in the using process, as shown in fig. 1a, since the first alignment film 141 and the second alignment film 142 are oppositely disposed, so that the directions of the first pretilt angle α and the second pretilt angle β are different, the alignment direction of the first alignment film 141 and the alignment direction of the second alignment film 142 may be the same, that is, the structure of the first alignment film 141 and the structure of the second alignment film 142 may be identical.

Referring to FIG. 2c, when Rubbing is performed from right to left, the left end of the alignment direction of the third alignment film 151 forms an angle inclined to the left. Based on this, under the action of the third alignment film 151, the first liquid crystal molecules 150' close to the third alignment film 151 generate the third pretilt angle γ. Referring to fig. 1b and 2c, the alignment direction of the third alignment film 151 and the alignment direction of the first alignment film 141 may be opposite or substantially opposite.

In other embodiments, referring to fig. 1a, 2a and 2b, the alignment direction of the third alignment film 151 and the alignment direction of the second alignment film 142 may be the same, that is, the same as the alignment direction of the first alignment film 141. That is, in this structure, the alignment directions of the first alignment film 141, the second alignment film 142, and the third alignment film 151 may be the same, so that the preparation process of the alignment films (including the first alignment film 141, the second alignment film 142, and the third alignment film 151) is simple.

In the related art (refer to fig. 3a), the liquid crystal display panel 1 has a light leakage problem in the L0 state, where the L0 state indicates that no voltage is applied to the liquid crystal display panel 1, the liquid crystal display panel 1 is in a dark state, and the backlight module normally provides a light source. When the liquid crystal display panel 1 is in the L0 state, when the liquid crystal display panel 1 is subjected to a pressure (e.g., a pressure generated by pressing), the liquid crystal display panel 1 is deformed, and the deformation occursIn the method, a first substrate 11 in the array substrate and a second substrate 12 in the color filter substrate deform due to pressure to generate non-uniform stress, and the non-uniform stress changes the polarization state of light, but the first substrate 11 and the second substrate 12 change the polarization state of light in the same direction and in opposite directions, so as to achieve mutual cancellation. For example, referring to the poincare diagram shown in fig. 3b, along the emitting direction of the light ray, after the light ray emitted from the backlight module passes through the first polarizer 18, the polarization state of the light ray is located at a point O, and the light ray is a linearly polarized light ray at this time; after passing through the first substrate 11, the light is affected by the non-uniform stress, and the polarization state is located at the point O₁Here, the light is elliptically polarized light; after passing through the liquid crystal layer 14, the light is modulated by the liquid crystal molecules, and the polarization state is at the point O₂Here, the light is elliptically polarized light; after passing through the second substrate 12, the light is affected by the non-uniform stress, and the polarization state is located at the point O₃Where the light is elliptically polarized, point O₃There is a distance between the point O, that is, so the light incident to the second polarizing plate 19 is elliptically polarized light and not linearly polarized light, thus causing part of elliptically polarized light to exit from the second polarizing plate 19, causing a problem of light leakage of the liquid crystal display panel 1.

In contrast, when the liquid crystal display panel in the present disclosure is in the L0 state, the changes of the polarization states of the light rays due to the non-uniform stress generated by the deformation of the first substrate 11 and the second substrate 12 cancel each other out, and the optical compensation layer 15 may positively compensate the changes of the polarization states of the light rays by the liquid crystal layer 14, so that the light rays emitted from the second substrate 12 are linearly polarized light rays.

Since the polarizing plates in the liquid crystal display panel 1 also affect the polarization state of light, in order to facilitate analysis of the state of light in the liquid crystal display panel 1, it is necessary to perform analysis in the case where the liquid crystal display panel 1 in the present disclosure further includes a first polarizing plate disposed on the side of the first substrate 11 away from the liquid crystal layer 14 and a second polarizing plate disposed on the side of the second substrate 12 away from the liquid crystal layer 14.

With reference to FIG. 4The illustrated poincare diagram shows that along the emergent direction of the light, the light emergent from the backlight module passes through the first polaroid, the polarization state is located at a point O, and the light is linearly polarized at the moment; after passing through the first substrate 11, the light is affected by the non-uniform stress, and the polarization state is located at the point O₁Here, the light is elliptically polarized light; after passing through the liquid crystal layer 14, the light is modulated by the phase retardation of the second liquid crystal layer 140, and the polarization state is at the point O₂Here, the light is elliptically polarized light; after passing through the optical compensation layer 15, the light is modulated by the phase retardation of the first liquid crystal molecular layer 150, and the polarization state is at the point O₃Point O₃And point O₁Coincidence, wherein the light is elliptical polarized light; after the light passes through the second substrate 12, the polarization state is at the point O under the influence of the non-uniform stress, and at this time, the light is changed into linearly polarized light again, so that the light incident on the second polarizer is linearly polarized light and cannot exit from the second polarizer, thereby avoiding the light leakage phenomenon when the liquid crystal display panel 1 is stressed, and the optical compensation layer 15 can play a compensation role at different viewing angles.

Illustratively, the in-plane phase retardation of the first liquid crystal molecular layer 150 may be approximately represented as R₁Where d1 is the thickness of the first liquid crystal molecule layer 150, ne is the refractive index of the first liquid crystal molecule layer 150 for extraordinary rays, and n0 is the refractive index of the first liquid crystal molecule layer 150 for ordinary rays. The phase retardation of the compensation layer of the first liquid crystal molecular layer 150 can be adjusted by adjusting relevant parameters (e.g., refractive index properties, thickness) of the first liquid crystal molecular layer 150.

Therefore, referring to fig. 4, the present disclosure positively compensates for the phase retardation of the liquid crystal layer 14 by increasing the phase retardation generated after the optical compensation layer 15, so that the polarization state of the light exiting from the optical compensation layer 15 can be from the point O₂Is moved to point O₃To (3).

The optical compensation layer 15 can perform a compensation function at different viewing angles, so that when the liquid crystal display panel 1 is viewed from the left side and the right side, the light leakage luminance of the liquid crystal display panel 1 in the present disclosure is smaller than the light leakage luminance of the liquid crystal display panel 1 in the related art, and when the liquid crystal display panel 1 is viewed from the left side and the right side, the display effect of the liquid crystal display panel 1 can be measured by using the color shift, so that the color shift degree of the liquid crystal display panel 1 in the present disclosure is lower than the color shift degree of the liquid crystal display panel 1 in the related art, and the display effect is better.

Note that light leakage in the L0 state may be a phenomenon that occurs when the liquid crystal display panel 1 is viewed from the front viewing angle. The color shift may be a phenomenon that occurs when the liquid crystal display panel 1 is viewed from the left or right side (side viewing angle) in the state of L0, and the color shift is also substantially caused by light leakage. Therefore, when the present disclosure can reduce the luminance of the light leakage of the liquid crystal display panel 1, the luminance corresponding to the color shift can also be reduced, thereby improving the display effect of the liquid crystal display panel 1.

Alternatively, referring to fig. 1a to 1g, the orthogonal projection direction of the long axis of the first liquid crystal molecule 150 'on the plane of the first alignment film 141 and the orthogonal projection direction of the long axis of the second liquid crystal molecule 140' on the plane of the third alignment film 151 are parallel or substantially parallel.

In some embodiments, when the alignment direction of the first alignment film 141, the alignment direction of the second alignment film 142, and the direction of the third alignment film 151 are the same, the long axis direction of the first liquid crystal molecules 150 'and the long axis direction of the second liquid crystal molecules 140' are parallel, such that the orthogonal projection direction of the long axis of the first liquid crystal molecules 150 'on the plane of the first alignment film 141 and the orthogonal projection direction of the long axis of the second liquid crystal molecules 140' on the plane of the third alignment film 151 are parallel or substantially parallel.

In other embodiments, when the alignment direction of the first alignment film 141, the alignment direction of the second alignment film 142, and the alignment direction of the third alignment film 151 are opposite, the long axis direction of the first liquid crystal molecules 150 'and the long axis direction of the second liquid crystal molecules 140' are substantially parallel, such that the orthographic projection direction of the long axis of the first liquid crystal molecules 150 'on the plane of the first alignment film 141 and the orthographic projection of the long axis of the second liquid crystal molecules 140' on the plane of the third alignment film 151 are parallel or substantially parallel.

Since the degrees of the first pretilt α, the second pretilt β, and the third pretilt γ are small, for example, 1 °, even if the pretilt directions are different, the long axis direction of the first liquid crystal molecules 150 'and the long axis direction of the second liquid crystal molecules 140' are substantially parallel to each other.

The long axis direction of the first liquid crystal molecules 150 'and the long axis direction of the second liquid crystal molecules 140' are parallel or substantially parallel, so that the optical compensation layer 15 can realize the forward compensation of the liquid crystal layer 14, and the forward compensation is beneficial to reducing the thickness of the optical compensation layer 15 because the phase retardation of the liquid crystal layer 14 can be set to be larger.

Alternatively, referring to fig. 1a, 1d, 1f and 1g, the alignment direction of the first alignment film 141, the alignment direction of the second alignment film 142 and the direction of the third alignment film 151 are the same.

The alignment direction of the first alignment film 141, the alignment direction of the second alignment film 142, and the alignment direction of the third alignment film 151 are the same, and the manufacturing process of the liquid crystal display panel 1 is simple.

Alternatively, the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 is equal to a positive integer multiple of the first wavelength; the first wavelength is in the range 535nm + -50 nm.

By adjusting the refractive index properties of the liquid crystal molecules of the optical compensation layer 15 and/or the liquid crystal layer 14 and the thicknesses of the optical compensation layer 15 and/or the liquid crystal layer 14, the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 can be made equal to a positive integer multiple of the first wavelength.

The sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 can control the transmittance of light of different wavelengths. The first wavelength is in the range of 535nm + -50 nm, i.e. the first wavelength has a minimum value of 485nm, a maximum value of 585nm and a median value of 535 nm. When the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 is 535nm, the light leakage at the front viewing angle and the side viewing angle is significantly reduced when the liquid crystal display panel 1 is in the L0 state, and the light leakage at the side viewing angle is blue when the liquid crystal display panel 1 is viewed from the side viewing angle. Compared with the color cast of red, yellow, green and the like, the color cast of blue is more easily accepted by people. Therefore, the first wavelength range is set to 535nm + -50 nm, which further improves the display effect.

Alternatively, referring to fig. 1a, 1d, 1f and 1g, the alignment direction of the first alignment film 141, the alignment direction of the second alignment film 142 and the direction of the third alignment film 151 are the same, and the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 is equal to a positive integer multiple of the first wavelength; the first wavelength is in the range 535nm + -50 nm. In this structure, the first alignment film 141, the second alignment film 142, and the third alignment film 151 are relatively simple to manufacture, and the transmittance of the liquid crystal display panel 1 for light with the first wavelength is ensured to be relatively low, so that the display effect of the liquid crystal display panel 1 is ensured, and the production cost is also reduced.

Through experimental verification, when the liquid crystal display panel 1 in the related art (refer to fig. 3a) is observed at different polarization angle positions under the condition that the azimuth angles are all 45 °, when the liquid crystal display panel 1 has a light leakage phenomenon, a curve of brightness changing with the polarization angle is S1; when the liquid crystal display panel 1 adopting the structure of fig. 1a in the present disclosure is observed at different polarization angle positions, when the liquid crystal display panel 1 has a light leakage phenomenon, the variation curve of the brightness along with the polarization angle is S2, as is apparent from fig. 5, when the liquid crystal display panel 1 has the light leakage phenomenon, the brightness of the light leakage is lower, and therefore, the light leakage phenomenon of the liquid crystal display panel 1 in the present disclosure is less obvious compared with the liquid crystal display panel 1 in the related art, that is, the quality of the liquid crystal display panel 1 in the present disclosure is better.

Optionally, the phase retardation of the optical compensation layer 15 is in the range of 185nm ± 25 nm; the phase retardation of the liquid crystal layer 14 ranges from 350nm ± 25 nm. The minimum value of the phase retardation of the optical compensation layer 15 is, for example, 160nm, the maximum value is, for example, 210nm, and the median value is, for example, 185 nm; the minimum value of the phase retardation of the liquid crystal layer 14 is, for example, 325nm, the maximum value is, for example, 375nm, and the median value is, for example, 350 nm.

Alternatively, the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 is equal to a positive integer multiple of the first wavelength; the first wavelength is in the range 535nm + -25 nm.

Alternatively, the sum of the phase retardation of the optical compensation layer 15 and the phase retardation of the liquid crystal layer 14 is equal to a positive integer multiple of the first wavelength; the first wavelength was 535 nm.

Alternatively, referring to fig. 1f, the third alignment film 151 is disposed on the first substrate 11 near the liquid crystal layer 14.

Illustratively, the alignment direction of the third alignment film 151 and the alignment direction of the first alignment film 141 are the same or substantially the same.

Alternatively, referring to fig. 1d and 1e, the third alignment film 151 is disposed on the side of the first substrate 11 away from the liquid crystal layer 14.

Illustratively, referring to fig. 1d, the alignment direction of the third alignment film 151 and the alignment direction of the first alignment film 141 are the same or substantially the same.

In other embodiments, referring to fig. 1e, the alignment direction of the third alignment film 151 is opposite or substantially opposite to the alignment direction of the first alignment film 141.

Alternatively, referring to fig. 1a and 1b, the third alignment film 151 is disposed on the side of the second substrate 12 close to the liquid crystal layer 14.

Illustratively, referring to fig. 1a, the alignment direction of the third alignment film 151 is the same or substantially the same as the alignment direction of the second alignment film 142.

As another example, referring to fig. 1b, the alignment direction of the third alignment film 151 is opposite or substantially opposite to the alignment direction of the second alignment film 142.

Alternatively, referring to fig. 1c, the third alignment film 151 is disposed on a side of the second substrate 12 away from the liquid crystal layer 14.

Referring to fig. 1c, the alignment direction of the third alignment film 151 is opposite or substantially opposite to the alignment direction of the second alignment film 142.

The first liquid crystal molecules 150 'in the optical compensation layer 15 are cured in the optical compensation layer 15, and the positions and the pretilt angles of the first liquid crystal molecules 150' are fixed and are not affected by the electric field in the liquid crystal display panel 1, so that the positions of the optical compensation layer 15 can be changed according to different design requirements, process requirements and the like, so as to improve the adaptability of the optical compensation layer 15 to different liquid crystal display panels 1.

Alternatively, referring to fig. 6a and 6b, the optical compensation layer 15 further includes a third substrate 13, and the third substrate 13 and the third alignment film 151 are located on the same side or opposite sides of the first liquid crystal molecular layer 150.

In some embodiments, the material of the third substrate base 13 is, for example, the same as the material of the first substrate base 11 and the second substrate base 12.

In other embodiments, the thickness of the third substrate base 13 is equal to or less than the thickness of the first substrate base 11 and/or the second substrate base 12.

Referring to fig. 6a, the third substrate 13 and the third alignment film 151 are respectively located at two sides of the first liquid crystal molecule layer 150, wherein the alignment direction of the third alignment film 151 is the same or substantially the same as the alignment direction of the first alignment film 141 and the second alignment film 142.

Referring to fig. 6b, the third alignment film 151 is disposed on the third base substrate 13, that is, the third alignment film 151 and the third base substrate 13 are disposed on the same side of the first liquid crystal molecule layer 150, wherein the alignment direction of the third alignment film 151 is opposite or substantially opposite to the alignment directions of the first alignment film 141 and the second alignment film 142.

After the third substrate base plate 13 is disposed in the liquid crystal display panel 1, on one hand, when the third alignment film 151 and the third substrate base plate 13 are located on opposite sides of the first liquid crystal molecular layer 150, the third substrate base plate 13 has a planarization function, so as to facilitate subsequent manufacturing of other film layers, such as the second alignment film 142, on one side of the third substrate base plate 13 away from the first liquid crystal molecular layer 150; on the other hand, when the third alignment film 151 and the third substrate 13 are located on the same side, when the third alignment film 151 is manufactured, the third alignment film may be directly manufactured on the third substrate 13, and then the third substrate 13 and the second substrate 12 are subjected to cell alignment, and the first liquid crystal molecule 150' is injected to form the first liquid crystal molecule layer 150, so that the third alignment film 151 may be manufactured independently, and the process conditions (such as high temperature) in the process of manufacturing the third alignment film 151 may not affect other manufactured film layers on the first substrate 11 or the second substrate 12, such as a thin film transistor layer.

Alternatively, referring to fig. 6b, the third alignment film 151 and the second alignment film 142 are disposed on opposite sides of the third base substrate 13.

Illustratively, the opposite sides of the third substrate base 13 in the thickness direction of the third substrate base 13 are, for example, the upper surface and the lower surface of the third substrate base 13.

In some embodiments, the alignment direction of the third alignment film 151 and the alignment direction of the second alignment film 142 are opposite or substantially opposite, and the direction of the second pretilt angle β is the same or substantially the same as the direction of the third pretilt angle γ.

When the third alignment film 151 and the second alignment film 142 are disposed on two opposite sides of the third substrate 13, the third alignment film 151 and the second alignment film 142 can be conveniently fabricated directly on the third substrate 13, so that the fabrication processes of the third alignment film 151 and the second alignment film 142 are relatively independent from those of other structures (such as the second substrate 12 and the second substrate 12) in the liquid crystal display panel 1. As other film layers are often required to be manufactured on the first substrate 11 and the second substrate 12, for example, a thin film transistor layer is also required to be manufactured on the first substrate 11, and a filter layer is also required to be manufactured on the second substrate 12, when the manufacturing process of the third alignment film 151 and the second alignment film 142 is independent from other structures in the liquid crystal display panel 1, on one hand, the manufacturing efficiency of the liquid crystal display panel 1 can be improved, and on the other hand, the influence on other structures when the third alignment film 151 and the second alignment film 142 are manufactured can be avoided.

Optionally, referring to fig. 6c and 6d, the optical compensation layer 15 further includes a fourth alignment film 152, and the fourth alignment film 152 is disposed on a side of the third substrate 13 away from the liquid crystal layer 14 or a side of the second substrate 12 close to the liquid crystal layer 14. The fourth alignment film 152 is configured to anchor a portion of the first liquid crystal molecules 150 'close to the first liquid crystal molecule layer 150, so that the portion of the first liquid crystal molecules 150' close to the fourth alignment film 152 generates a fourth pretilt angle θ; the direction of the fourth pretilt θ is opposite or substantially opposite to the direction of the third pretilt γ.

Referring to fig. 6c, the fourth alignment film 152 is disposed on the side of the third substrate 13 away from the liquid crystal layer 14, and the third alignment film 151 is disposed on the side of the first substrate 11 close to the liquid crystal layer 14, i.e., the third alignment film 151 and the fourth alignment film 152 are oppositely disposed.

In other embodiments, referring to fig. 6d and 6e, the third alignment film 151 is disposed on the side of the third substrate 13 away from the liquid crystal layer 14, and the fourth alignment film 152 is disposed on the side of the second substrate 12 close to the liquid crystal layer 14.

The alignment direction of the fourth alignment film 152 is opposite to that of the third alignment film 151. In some embodiments, referring to fig. 6c and 6d, when the first liquid crystal molecules 150 'in the first liquid crystal molecule layer 150 are in a one-layer structure, the third alignment film 151 and the fourth alignment film 152 simultaneously anchor the one layer of the first liquid crystal molecules 150', and the magnitude of the fourth pretilt angle θ and the magnitude of the third pretilt angle γ are equal and opposite. In this structure, the fourth alignment film 152 may increase an anchoring force to the first liquid crystal molecules 150 ', and further fix the positions of the first liquid crystal molecules 150' constant.

In other embodiments, referring to fig. 6e, when the first liquid crystal molecules 150 'of the first liquid crystal molecule layer 150 are multi-layered (at least two-layered), the third alignment film 151 may anchor a portion of the first liquid crystal molecules 150' adjacent thereto, the fourth alignment film 152 may anchor a portion of the first liquid crystal molecules 150 'adjacent thereto, the magnitude of the fourth pretilt angle θ is equal to or substantially equal to the magnitude of the third pretilt angle γ, and the direction of the fourth pretilt angle θ is opposite to or substantially opposite to the direction of the third pretilt angle γ, so that the arrangement directions of the first liquid crystal molecules 150' in the entire first liquid crystal molecule layer 150 are the same or approximately the same. The fourth alignment film 152 and the third alignment film 151 are used in combination, so that the first liquid crystal molecules 150 'can be a multi-layer structure, the selectable types of the liquid crystal molecules that can be used as the first liquid crystal molecules 150' are increased, and the production cost of the liquid crystal display panel 1 can be reduced to a certain extent.

Alternatively, referring to fig. 6c, the fourth alignment film 152 and the second alignment film 142 are disposed on opposite sides of the third base substrate 13.

The fourth alignment film 152 and the second alignment film 142 are formed on the third substrate, and the manufacturing process is simple.

Alternatively, referring to fig. 7, the third alignment film 151 is disposed on a side of the second substrate 12 close to the liquid crystal layer 14, the planarization layer 16 is further disposed on a side of the first liquid crystal molecule layer 150 close to the liquid crystal layer 14, and the second alignment film 142 is disposed on a side of the planarization layer 16 close to the liquid crystal layer 14.

The planarization layer 16 is also referred to as an oc (over coat) layer, the material of the planarization layer 16 may be an organic material, such as polyimide, the planarization layer 16 mainly serves to planarize, and after the planarization layer 16 is disposed on the side of the first liquid crystal molecule layer 150 away from the second substrate 12, a relatively flat surface may be provided for the subsequent fabrication of the second alignment film 142, so as to improve the quality of the fabricated second alignment film 142.

Alternatively, the thickness ranges of the first alignment film 141, the second alignment film 142, the third alignment film 151, and the fourth alignment film 152 are, for example, 0.01 μm to 10 μm.

The thicknesses of the alignment films (including the first to fourth alignment films) within the above thickness range are small, which is beneficial to realizing the lightness and thinness of the liquid crystal display panel 1.

Optionally, the first, second and third pretilt angles α, β, γ are equal or substantially equal.

The first, second, and third pretilt angles α, β, and γ are equal or substantially equal, meaning that the degrees of the pretilt angles are equal or substantially equal, regardless of their directions.

When the first pretilt angle α, the second pretilt angle β, and the third pretilt angle γ are equal or substantially equal, the manufacturing difficulty of each alignment film can be reduced.

In other embodiments, as shown in FIG. 6c, the first, second, third and fourth pretilt angles α, β, γ, θ are equal or substantially equal.

Alternatively, the first pretilt α, the second pretilt β, the third pretilt γ, and the fourth pretilt θ may range from 2 ° ± 2 °.

Note that there is no case where the first pretilt angle α, the second pretilt angle β, the third pretilt angle γ, and the fourth pretilt angle θ are equal to 0 °.

Illustratively, the first pretilt α, the second pretilt β, the third pretilt γ, and the fourth pretilt θ are all equal to 2 °.

As another example, the first, second, third, and fourth pretilt angles α, β, γ, and θ are all equal to 4 °.

The specific numerical values of the first pretilt angle alpha, the second pretilt angle beta, the third pretilt angle gamma and the fourth pretilt angle theta can be selected according to actual needs and process conditions, so that the manufacturing difficulty of the liquid crystal display panel 1 process is reduced.

In some embodiments, the first substrate 11 is, for example, a substrate in an array substrate, and the second substrate 12 is, for example, a substrate in a color filter substrate.

Based on this, optionally, as shown in fig. 8a, a functional film layer 17 is further disposed on the first substrate 11; the optical compensation layer 15 is disposed on a side of the functional film layer 17 close to the liquid crystal layer 14.

The functional film layer 17 includes, for example, a thin film transistor layer, a pixel electrode layer, a common electrode layer, a data line, an insulating layer, and the like, and a specific position and a specific structure of each film layer in the functional film layer 17 are determined according to different design requirements, which is not limited in this disclosure.

For example, referring to fig. 8b, a thin film transistor layer 170 in the functional film layer 17 is disposed on a side of the first substrate 11 close to the liquid crystal layer 14, the thin film transistor layer 170 includes a plurality of thin film transistors, and source electrodes and drain electrodes of the thin film transistors and the data lines 171 are fabricated using the same conductive material in the same layer; a first insulating layer 172, a common electrode layer 173, a second insulating layer 174, a pixel electrode layer 175 and a third insulating layer 176 are sequentially stacked on one side of the data line 171, which is far away from the first substrate 11, wherein the pixel electrode layer 175 includes a plurality of strip-shaped electrodes spaced from each other, the common electrode layer 173 includes a common electrode in a planar structure, and the pixel electrode and the common electrode are both transparent; the material of the first insulating layer 172, the second insulating layer 174, and the third insulating layer 176 may be an inorganic material, such as at least one of silicon oxide and silicon nitride, or an organic material, such as polyimide, which is not limited in this disclosure.

In the structure shown in fig. 8b, the pixel electrode layer 175 is closer to the liquid crystal layer 14 than the common electrode layer 173, so the pixel electrode has a stripe structure and the common electrode has a planar structure. In other embodiments, the common electrode layer 173 is closer to the liquid crystal layer 14 than the pixel electrode layer 175, so that the common electrode has a stripe structure and the pixel electrode has a planar structure. In still other embodiments, the pixel electrode and the common electrode are both stripe structures.

On this basis, as shown in fig. 9a to 9b, the liquid crystal display panel 1 further includes a first polarizing plate 18 and a second polarizing plate 19, and the polarization direction of the first polarizing plate 18 and the polarization direction of the second polarizing plate 19 are perpendicular or substantially perpendicular to each other.

Illustratively, the first polarizing plate 18 is disposed on a side of the first substrate 11 away from the liquid crystal layer 14, and the second polarizing plate 19 is disposed on a side of the second substrate 12 away from the liquid crystal layer 14.

The first polarizer 18 and the second polarizer 19 are used for changing the polarization state of light, wherein the first polarizer 18 is used for making the light emitted from the backlight module into linearly polarized light.

Optionally, the optical compensation layer 15 is a + a compensation film layer. The + A compensation film layer satisfies nx > ny ═ nz, where nx is a refractive index in an X-axis direction in the plane of the + A compensation film layer, ny is a refractive index in a Y-axis direction perpendicular to the X-axis in the plane of the + A compensation film layer, and nz is a refractive index in a thickness direction of the + A compensation film layer.

Referring to fig. 10, an embodiment of the present disclosure further provides a method for manufacturing a liquid crystal display panel 1, including:

s1, a first alignment film 141 is formed on one side of the first substrate base plate 11.

The material of the first alignment film 141 is, for example, polyimide, which is coated on the first substrate 11 by, for example, a coating method, and then the alignment process of the first alignment film 141 is performed.

S2, the third alignment film 151 on the side of the second base substrate 12.

S3, forming and curing the first liquid crystal molecule layer 150 on the third alignment film 151, the first liquid crystal molecule 150' having the third pretilt angle γ.

The curing of the first liquid crystal molecule layer 150 is achieved, for example, by adding a polymer, such as a photopolymer or a thermopolymer, to the first liquid crystal molecule 150' and then curing the polymer by ultraviolet light, heat, or the like.

S4, a second alignment film 142 is formed on the first liquid crystal molecular layer 150.

S5, aligning the first substrate 11 on which the first alignment film 141 is formed and the second substrate 12 on which the second alignment film 142 is formed, and forming the second liquid crystal molecular layer 140 between the first alignment film 141 and the second alignment film 142; the second liquid crystal molecules 140 'of the second liquid crystal molecule layer 140 close to the first alignment film 141 have a first pretilt angle α, and the second liquid crystal molecules 140' of the second liquid crystal molecule layer 140 close to the second alignment film 142 have a second pretilt angle β. The direction of the first pretilt α is opposite or substantially opposite to the direction of the second pretilt β, and the direction of the third pretilt γ is the same or substantially the same as the direction of the first pretilt α or the direction of the second pretilt β.

The first liquid crystal molecules 150 'and the second liquid crystal molecules 140' may be the same liquid crystal molecules or different liquid crystal molecules, and only the design requirements of the liquid crystal display panel 1 in the present disclosure need to be met, which is not limited by the present disclosure.

The manufacturing method of the liquid crystal display panel 1 has the same beneficial effects as the liquid crystal display panel 1, and thus, the description is omitted.

Alternatively, referring to fig. 7, before forming the second alignment film 142 on the first liquid crystal molecular layer 150, the preparation method further includes:

a planarization layer 16 is formed on the first liquid crystal molecular layer 150. The planarization layer 16 can make the surface of the first liquid crystal molecule layer 150 on the side near the liquid crystal layer 14 more flat, which facilitates the subsequent preparation of the second alignment film 142 on the planarization layer 16.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (19)

1. A liquid crystal display panel, comprising:

the first substrate base plate and the second substrate base plate are oppositely arranged;

a liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer comprises a first alignment film and a second alignment film which are oppositely arranged, and a second liquid crystal molecular layer positioned between the first alignment film and the second alignment film; the first alignment film is configured to anchor a part of second liquid crystal molecules close to the first alignment film in the second liquid crystal molecule layer, so that a first pretilt angle is generated on the part of the second liquid crystal molecules close to the first alignment film; the second alignment film is configured to anchor a part of the second liquid crystal molecules close to the second liquid crystal molecule layer, so that a second pretilt angle is generated on the part of the second liquid crystal molecules close to the second alignment film; the direction of the first pretilt is opposite or substantially opposite to the direction of the second pretilt;

the optical compensation layer is arranged on one side, away from the second liquid crystal molecular layer, of the first alignment film or the second alignment film; the optical compensation layer comprises a third alignment film and a first liquid crystal molecular layer; the third alignment film is configured to anchor the first liquid crystal molecules close to the third alignment film in the first liquid crystal molecular layer, so that the first liquid crystal molecules close to the third alignment film generate a third pretilt angle; the direction of the third pretilt is the same as or substantially the same as the direction of the first pretilt or the direction of the second pretilt.

2. The liquid crystal display panel according to claim 1, wherein an orthogonal projection direction of the long axes of the first liquid crystal molecules on a plane of the first alignment film and an orthogonal projection direction of the long axes of the second liquid crystal molecules on a plane of the third alignment film are parallel or substantially parallel.

3. The liquid crystal display panel according to claim 1, wherein an alignment direction of the first alignment film, an alignment direction of the second alignment film, and a direction of the third alignment film are the same.

4. The liquid crystal display panel according to claim 2 or 3, wherein the sum of the phase retardation of the optical compensation layer and the phase retardation of the liquid crystal layer is equal to a positive integer multiple of the first wavelength; the first wavelength is in the range of 535nm + -50 nm.

5. The liquid crystal display panel according to claim 4, wherein the optical compensation layer has a phase retardation in a range of 185nm ± 25 nm; the phase retardation range of the liquid crystal layer is 350nm +/-25 nm.

6. The liquid crystal display panel according to claim 1, wherein the third alignment film is disposed on a side of the first substrate adjacent to the liquid crystal layer;

or the third alignment film is arranged on one side of the first substrate far away from the liquid crystal layer;

or the third alignment film is arranged on one side of the second substrate close to the liquid crystal layer;

or the third alignment film is arranged on one side of the second substrate base plate far away from the liquid crystal layer.

7. The liquid crystal display panel of claim 1, wherein the optical compensation layer further comprises a third substrate, and the third substrate and the third alignment film are located on the same side or opposite sides of the first liquid crystal molecular layer.

8. The liquid crystal display panel of claim 7, wherein the third alignment film and the second alignment film are disposed on opposite sides of the third substrate.

9. The liquid crystal display panel according to claim 7, wherein the optical compensation layer further comprises a fourth alignment film disposed on a side of the third substrate away from the liquid crystal layer or on a side of the second substrate close to the liquid crystal layer; the fourth alignment film is configured to anchor a part of the first liquid crystal molecules close to the fourth alignment film in the first liquid crystal molecule layer, so that a fourth pretilt angle is generated on the part of the first liquid crystal molecules close to the fourth alignment film; the direction of the fourth pretilt is opposite or substantially opposite to the direction of the third pretilt.

10. The lcd panel of claim 9, wherein the fourth alignment film and the second alignment film are disposed on opposite sides of the third substrate.

11. The liquid crystal display panel according to claim 1, wherein the third alignment film is disposed on a side of the second substrate close to the liquid crystal layer, a planarization layer is further disposed on a side of the first liquid crystal molecule layer close to the liquid crystal layer, and the second alignment film is disposed on a side of the planarization layer close to the liquid crystal layer.

12. The liquid crystal display panel of claim 1, wherein the optical compensation layer is a + a compensation film layer.

13. The liquid crystal display panel of claim 1, wherein the first pretilt angle, the second pretilt angle, and the third pretilt angle are equal or substantially equal.

14. The liquid crystal display panel according to claim 1 or 13, characterized in that the first pretilt angle, the second pretilt angle, and the third pretilt angle are in a range of 2 ° ± 2 °.

15. The liquid crystal display panel of claim 14, wherein the first pretilt, the second pretilt, and the third pretilt are in a range of 2 ° ± 1 °.

16. The liquid crystal display panel according to claim 1, wherein a functional film layer is further provided on the first substrate base plate; the optical compensation layer is arranged on one side of the functional film layer close to the liquid crystal layer.

17. A display device comprising the liquid crystal display panel according to any one of claims 1 to 16.

18. A method for manufacturing a liquid crystal display panel includes:

forming a first alignment film on one side of a first substrate base plate;

a third alignment film on one side of the second substrate base plate;

forming a first liquid crystal molecular layer on the third alignment film and curing, wherein the first liquid crystal molecular layer has a third pretilt angle;

forming a second alignment film on the first liquid crystal molecular layer;

aligning the first substrate base plate on which the first alignment film is formed and the second substrate base plate on which the second alignment film is formed, and forming a second liquid crystal molecular layer between the first alignment film and the second alignment film; wherein a part of second liquid crystal molecules in the second liquid crystal molecule layer, which are close to the first alignment film, have a first pretilt angle, and a part of second liquid crystal molecules in the second liquid crystal molecule layer, which are close to the second alignment film, have a second pretilt angle;

the first pretilt is in a direction opposite or substantially opposite to the second pretilt, and the third pretilt is in a direction the same as or substantially the same as the direction of the first pretilt or the direction of the second pretilt.

19. The method according to claim 18, wherein before the second alignment film is formed on the first liquid crystal molecular layer, the method further comprises:

a planarization layer is formed on the first liquid crystal molecular layer.

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