CN115657364B

CN115657364B - Liquid crystal display panel, preparation method thereof and display device

Info

Publication number: CN115657364B
Application number: CN202211238217.7A
Authority: CN
Inventors: 郭远辉; 韩杰; 南明智
Original assignee: BOE Technology Group Co Ltd; Wuhan BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Wuhan BOE Optoelectronics Technology Co Ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-11-07
Anticipated expiration: 2042-10-10
Also published as: CN115657364A

Abstract

A liquid crystal display panel, a manufacturing method thereof and a display device are provided. The liquid crystal display panel comprises a color film substrate, a liquid crystal layer and an array substrate which are sequentially arranged; the liquid crystal display panel comprises a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels respectively transmitting different monochromatic lights; the liquid crystal display panel also comprises a shielding part, wherein the front projection of the shielding part on the array substrate and the front projection of the sub-pixel transmitting red light on the array substrate are at least partially overlapped; the liquid crystal layer comprises a first liquid crystal group, the front projection of the first liquid crystal group on the array substrate and the front projection of the sub-pixels except red light in the array substrate are at least partially overlapped, and the first liquid crystal group is used for preventing corresponding monochromatic light from passing through the liquid crystal display panel. The embodiment of the application utilizes the shielding part and the first liquid crystal group to improve the display reddening and reduce the occurrence probability of other color deviations.

Description

Liquid crystal display panel, preparation method thereof and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a liquid crystal display panel, a manufacturing method thereof, and a display device.

Background

The UV2A (UltraVioletVerticalAlignment) technology is a VA (vertical alignment) panel technology in which liquid crystal alignment is performed by UltraViolet (UltraViolet), and the name of the VA technology is derived from multiplication of UltraViolet UV and VA mode of a liquid crystal panel. The technology can precisely control the alignment of liquid crystal molecules through ultraviolet rays, and greatly improves the light transmittance.

The key of UV2A is to control the tilt of liquid crystal molecules along the UV direction with high accuracy by using a specific polymer material as an alignment film. The accuracy unit is picometer (one megameter). The UV2A has an advantage in that the liquid crystal panel is of a simple construction without protrusions and slits. The liquid crystal panel with a simple structure can not only improve the production efficiency, but also has a lot of advantages in image quality. The opening rate of each pixel is improved by at least 20% because no redundant convex parts exist. In addition, light of the backlight of the conventional structure is scattered at the convex and slit portions, causing light leakage at the display side, and thus blackens. In contrast, UV2A technology does not leak light in both the raised and slit portions, and therefore static contrast can reach 5000:1, which is 1.6 times that of the original.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the application provides a liquid crystal display panel, a preparation method thereof and a display device. The liquid crystal display panel can improve the reddening of the display panel and reduce the occurrence probability of other color deviations.

The embodiment of the application provides a liquid crystal display panel. The liquid crystal display panel comprises a color film substrate, a liquid crystal layer and an array substrate which are sequentially arranged; the liquid crystal display panel comprises a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels respectively transmitting different monochromatic lights;

the liquid crystal display panel also comprises a shielding part, wherein the front projection of the shielding part on the array substrate and the front projection of the sub-pixel transmitting red light on the array substrate are at least partially overlapped;

the liquid crystal layer comprises a first liquid crystal group, the front projection of the first liquid crystal group on the array substrate is at least partially overlapped with the front projection of the sub-pixels except the transmitted red light on the array substrate,

the first liquid crystal group is used for preventing corresponding monochromatic light from passing through the liquid crystal display panel.

In an exemplary embodiment, the setting position of the shielding part includes at least one of:

the color film substrate is arranged on one side of the color film substrate far away from the array substrate;

the color film substrate is arranged in the color film substrate;

the color film substrate is arranged on one side of the color film substrate, which is close to the array substrate;

the color film substrate is arranged on one side of the array substrate, which is close to the color film substrate;

the array substrate is arranged in the substrate;

the color film substrate is arranged on one side of the array substrate far away from the color film substrate.

In an exemplary embodiment, the front projection of the shielding part on the array substrate is located in the middle of the front projection of the sub-pixel transmitting red light on the array substrate.

In an exemplary embodiment, the front projection of the shielding part on the array substrate is rectangular, square, cross-shaped, circular or polygonal.

In an exemplary embodiment, the shielding part comprises more than two shielding sub-parts which are arranged at the same layer and are spaced.

In an exemplary embodiment, the shielding part includes a first shielding part and a second shielding part; the first shielding part and the second shielding part are positioned on different layers of the liquid crystal display panel.

In an exemplary embodiment, the front projection of the first shielding portion on the array substrate and the front projection of the second shielding portion on the array substrate do not overlap or at least partially overlap.

In an exemplary embodiment, the liquid crystal display panel further includes a black matrix located on a side, far away from the array substrate, of the color film substrate, the first shielding portion and the black matrix are in the same layer, and a material of the first shielding portion and a material of the black matrix are the same.

In an exemplary embodiment, the array substrate includes a plurality of metal wire layers, the second shielding portion is disposed on one of the metal wire layers, and a material of the second shielding portion is the same as a material of the metal wire layer on which the second shielding portion is disposed.

In an exemplary embodiment, there is at least a partial overlap between the front projection of the first liquid crystal set on the array substrate and the front projection of the sub-pixels transmitting red light on the array substrate.

In an exemplary embodiment, there is at least a partial overlap between the front projection of the shielding portion on the array substrate and the front projection of the first liquid crystal group on the array substrate.

In an exemplary embodiment, the liquid crystal layer further includes a second liquid crystal group and a third liquid crystal group; in the direction perpendicular to the array substrate, the second liquid crystal group and the third liquid crystal group are arranged on two sides of the first liquid crystal group, and the alignment direction of the second liquid crystal group and the alignment direction of the third liquid crystal group are arranged symmetrically with respect to the first liquid crystal group.

In an exemplary embodiment, one of the pixel units includes a first sub-pixel transmitting a first monochromatic light, a second sub-pixel transmitting a second monochromatic light, and a third sub-pixel transmitting a third monochromatic light;

wherein the first monochromatic light comprises red light, the second monochromatic light comprises green light, and the third monochromatic light comprises blue light.

A display device comprises a backlight module; the liquid crystal display panel according to any one of the embodiments is also included.

A method for preparing a liquid crystal display panel is used for preparing the liquid crystal display panel in any embodiment. The preparation method comprises the following steps:

manufacturing the color film substrate and the array substrate, wherein the manufacturing comprises manufacturing a shielding part; the front projection of the shielding part on the array substrate is at least partially overlapped with the front projection of the sub-pixel transmitting red light on the array substrate;

the color film substrate and the array substrate which are manufactured are subjected to box alignment, a plurality of liquid crystal molecules are filled between the color film substrate and the array substrate after box alignment, and the liquid crystal molecules are formed into the liquid crystal layer; the liquid crystal layer comprises a first liquid crystal group, and the front projection of the first liquid crystal group on the array substrate is at least partially overlapped with the front projection of the sub-pixels except the transmitted red light on the array substrate; the first liquid crystal group is used for preventing corresponding monochromatic light from passing through the liquid crystal display panel.

The embodiment of the application provides a liquid crystal display panel, a preparation method thereof and a display device. According to the liquid crystal display panel provided by the embodiment of the application, the red light transmitted in the display panel is partially shielded by the shielding part, so that the light quantity of the red light is reduced, and the problem of red display of the display panel is solved. And then combining the first liquid crystal group to selectively shield the monochromatic light except the red light transmitted by the display panel so as to reduce the occurrence probability of other color cast and improve the display quality of the display panel on the whole.

It is not necessary for any one product or method of practicing the application to achieve all of the advantages set forth above at the same time. Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application. The shapes and sizes of the various components in the drawings are not to scale, and are intended to illustrate the present application only.

FIG. 1 is a schematic diagram of a partial stack structure of an oxide display panel;

FIG. 2 is a transmission spectrum of the oxide display panel of FIG. 1;

FIG. 3 is a schematic front view of a portion of a liquid crystal display panel according to an embodiment of the application;

FIG. 4A is a schematic top view of a portion of a liquid crystal display panel according to an embodiment of the application;

FIG. 4B is a schematic diagram showing a second partial top view of the LCD panel according to the embodiment of the application;

FIG. 4C is a schematic diagram of a liquid crystal display panel according to an embodiment of the application;

FIG. 5 is a schematic diagram showing a front view of a LCD panel in an embodiment of the application when displaying an L0 frame;

FIG. 6 is a schematic diagram showing a side view of a LCD panel in an embodiment of the application when displaying an L0 frame;

FIG. 7 is a schematic diagram showing a front view of a LCD panel in an embodiment of the application when displaying an L255 frame;

FIG. 8 is a schematic diagram showing a side view of a LCD panel in an embodiment of the application when displaying an L255 frame;

FIG. 9 is a schematic diagram of a four-domain liquid crystal display panel according to an embodiment of the application;

FIG. 10A is a front view of a liquid crystal display panel without a shielding portion;

FIG. 10B is a front view of a light effect diagram of a liquid crystal display panel with a shielding portion according to an embodiment of the present application;

FIG. 11A is a diagram showing the light efficiency of a liquid crystal display panel in a side view without a shielding portion;

fig. 11B is a side view of a light effect diagram of a liquid crystal display panel according to an embodiment of the application.

Reference numerals illustrate:

10-array substrate, 101-grid line layer, 102-data line layer, 103-pixel electrode layer;

20-color film substrate, 201-first sub-pixel, 202-second sub-pixel, 203-third sub-pixel, 204-common electrode layer;

30-liquid crystal layer, 301-first liquid crystal group, 302-second liquid crystal group, 303-third liquid crystal group;

40-black matrix;

50-shielding part, 501-first shielding part, 502-second shielding part, 503-shielding sub-part.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail hereinafter with reference to the accompanying drawings. Embodiments may be implemented in a number of different forms. One of ordinary skill in the art will readily recognize the fact that the patterns and matters may be changed into one or more forms without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited to the following description of the embodiments. Embodiments of the present disclosure and features of embodiments may be combined with each other arbitrarily without conflict.

In the drawings, the size of one or more constituent elements, thicknesses of layers or regions may be exaggerated for clarity. Accordingly, one aspect of the present disclosure is not necessarily limited to this dimension, and the shapes and sizes of the various components in the drawings do not reflect actual proportions. Further, the drawings schematically show ideal examples, and one mode of the present disclosure is not limited to the shapes or numerical values shown in the drawings, and the like.

The ordinal terms such as "first," "second," "third," and the like in the present disclosure are provided to avoid intermixing of constituent elements, and are not intended to be limiting in number. The term "plurality" in this disclosure includes two as well as more than two numbers.

In the present disclosure, for convenience, terms such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to describe positional relationships of the constituent elements with reference to the drawings, only for convenience in describing the present specification and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which the constituent elements are described. Therefore, the present invention is not limited to the words described in the specification, and may be appropriately replaced according to circumstances.

In this disclosure, the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically indicated and defined. For example, it may be a fixed connection, a removable connection, or an integral connection; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intermediate members, or may be in communication with the interior of two elements. The meaning of the above terms in the present disclosure can be understood by one of ordinary skill in the art as appropriate.

In this disclosure, a transistor refers to an element including at least three terminals of a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain) and a source electrode (source electrode terminal, source region, or source), and a current can flow through the drain electrode, the channel region, and the source electrode. In the present disclosure, a channel region refers to a region through which current mainly flows.

In the present disclosure, the first electrode may be a drain electrode, the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using a transistor having opposite polarity, or in the case of a change in the direction of current during circuit operation, the functions of the "source electrode" and the "drain electrode" may be interchanged. Thus, in this disclosure, the "source electrode" and the "drain electrode" may be interchanged.

In this disclosure, "electrically connected" includes a case where constituent elements are connected together by an element having some electric action. The "element having a certain electric action" is not particularly limited as long as it can transmit and receive an electric signal between the constituent elements connected. Examples of the "element having some electric action" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having one or more functions, and the like.

In the present disclosure, "parallel" refers to a state in which two straight lines form an angle of-10 ° or more and 10 ° or less, and thus, may include a state in which the angle is-5 ° or more and 5 ° or less. Further, "vertical" refers to a state in which an angle formed by two straight lines is 80 ° or more and 100 ° or less, and thus may include a state in which an angle is 85 ° or more and 95 ° or less.

In this disclosure, "film" and "layer" may be interchanged. For example, the "conductive layer" may be sometimes replaced with a "conductive film". In the same manner, the "insulating film" may be replaced with the "insulating layer" in some cases.

The term "about" in this disclosure refers to values that are not strictly limited to the limits, but are allowed to fall within the limits of the process and measurement errors.

In some existing implementations, designing an oxide thin film in a display panel may help to improve mobility of a semiconductor device. However, the stability of the oxide is poor, and it is generally necessary to provide silicon nitride films on the upper and lower sides of the oxide film for protection. In general, the refractive index of silicon oxide ranges from 1.5 to 1.6, and silicon nitride films are provided on the upper and lower sides of the silicon oxide film, the refractive index of silicon nitride is about 2.0, and the difference in refractive index between the upper and lower layers causes an interference phenomenon of light. The difference in refractive index causes the oxide substrate to be color biased at the front and side view angles.

Fig. 1 is a schematic view of a partial stacked structure of an oxide display panel. As shown in fig. 1, the structure includes an ITO layer, an ORG layer, a PVX2 layer, a PVX1 layer, a GI2 layer, and a GI1 layer from top to bottom, where the ORG layer, the PVX2 layer, the PVX1 layer, the GI2 layer, and the GI1 layer are all insulating layers (metal layers between the insulating layers are not shown in the figure). The insulating layer may be any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, a multi-layer, or a composite layer. The refractive indices of the above layers are different from each other, for example, the refractive index of the ITO layer is 1.76, the refractive index of the pvx2 layer (for example, siN) is 1.79, the refractive index of the pvx1 layer (for example, siO) is 1.458, the refractive index of the gi2 layer (for example, siO) is 1.46, and the refractive index of the gi1 layer (for example, siN) is 1.92. In fig. 1, an ITO layer is taken as an example, ITO in ITO 1.76 represents a material of indium tin oxide, an ITO layer is an indium tin oxide conductive layer, and 1.76 represents a refractive index. ORG may be referred to as an organic insulating layer. PVX may be referred to as a passivation layer and GI may be referred to as a gate insulating layer.

Fig. 2 is a transmission spectrum of the oxide display panel of fig. 1. As shown in fig. 2, the curve labeled (1) is a transmission curve at a front view angle, and the curve labeled (2) is a transmission curve at a side view angle. In fig. 2, the abscissa indicates wavelength, the ordinate indicates transmittance, the wavelength range of red light is 620 nm to 760 nm, the wavelength range of green light is 500 nm to 560 nm, and the wavelength range of blue light is 450 nm to 480 nm. As shown in fig. 2, at a side view angle, the transmittance of red light is higher than the transmittance of green light and the transmittance of blue light, which finally results in the phenomenon that the display panel is red in both L0 and L255 pictures. L0 represents a gray level of 0, and L255 represents a gray level of 255.

Based on the above-mentioned problems, the inventors of the present application found that the red shift problem of the display panel can be effectively improved by adopting a method of blocking a certain monochromatic light, but the blocking method can cause other color shifts of the front view angle and the side view angle of the display panel, i.e. cause the display quality to be reduced. For example, shielding only the red portion can cause the display panel to turn green at a positive viewing angle and turn green at a lateral viewing angle in a certain picture.

Based on the above analysis, the present inventors have proposed a liquid crystal display panel. The liquid crystal display panel partially shields the red light transmitted in the display panel by using the shielding part so as to reduce the light quantity of the red light and improve the problem of red display of the display panel. And the first liquid crystal group is combined, and the display panel is selectively shielded from monochromatic light except red light through control of the first liquid crystal group, so that the occurrence probability of other color cast is reduced, and the display quality of the display panel can be improved as a whole.

The technical scheme of the embodiment of the application is described in detail through a specific embodiment.

Fig. 3 is a partial front view of a liquid crystal display panel according to an embodiment of the application. Fig. 4A is a schematic partial top view of a liquid crystal display panel according to an embodiment of the application. Fig. 4B is a schematic top view of a portion of a lcd panel according to an embodiment of the application. Fig. 4C is a schematic diagram illustrating a partial top view of a lcd panel according to an embodiment of the application. In fig. 4A, 4B, and 4C, the black matrix is not filled for clarity of illustration. As shown in fig. 3 and 4A, three directions are defined for the explanation of the technical solution, and the first direction is denoted as X, the second direction is denoted as Y, and the third direction is denoted as Z. The first direction, the second direction and the third direction are all different, and in the embodiment of the application, the first direction, the second direction and the third direction are perpendicular to each other. Wherein the third direction (Z) is the cell thickness direction of the liquid crystal display panel.

The main structure of the liquid crystal display device in the embodiment of the application comprises a liquid crystal display panel and a backlight module. The liquid crystal display panel includes an Array substrate (Array) 10 and a Color Filter (CF) 20 provided to a Cell (Cell), and a liquid crystal layer 30 provided between the Array substrate 10 and the Color Filter substrate 20. As shown in fig. 3, along the third direction, the color film substrate 20, the liquid crystal layer 30 and the array substrate 10 are sequentially disposed from top to bottom. The plane in which the array substrate 10 is located is an XY plane. The liquid crystal layer 30 includes a plurality of liquid crystal molecules, one set of which may form a liquid crystal domain having a certain orientation, and a plurality of which may form a liquid crystal domain having a different orientation. For example, the liquid crystal display panel may be a four-domain liquid crystal display mode, or an eight-domain liquid crystal display mode, or a sixteen-domain liquid crystal display mode.

As shown in fig. 3, a plurality of Black matrices (Black Matrix) 40 are disposed on a side of the color film substrate 20 away from the array substrate 10, and the plurality of Black matrices 40 are distributed at intervals. The color filter substrate 20 includes color photoresists disposed between the black matrixes 40. The color resist includes a red resist forming a red (R) subpixel, a green resist forming a green (G) subpixel, and a blue resist forming a blue (B) subpixel. The color photoresist is used for filtering the transmitted light and only transmitting the light with corresponding color.

The liquid crystal display panel comprises a plurality of pixel units which are arranged in a matrix mode, and each pixel unit comprises a plurality of sub-pixels which are arranged periodically. Each subpixel is configured to transmit a different monochromatic light. In the embodiment of the present application, a pixel unit includes three sub-pixels. Each pixel unit includes a first sub-pixel 201, a second sub-pixel 202, and a third sub-pixel 203. The plurality of pixel units form a pixel unit array, and the plurality of pixel units may be arranged in a rectangular shape or the like. The first sub-pixel 201, the second sub-pixel 202 and the third sub-pixel 203 are respectively configured to transmit the first monochromatic light, the second monochromatic light and the third monochromatic light. In the embodiment of the application, taking the example that the first monochromatic light is set as red light, the second monochromatic light is set as green light and the third monochromatic light is set as blue light. Accordingly, the first sub-pixel 201 is configured to transmit red light, the second sub-pixel 202 is configured to transmit green light, and the third sub-pixel 203 is configured to transmit blue light.

As shown in fig. 4A, the liquid crystal display panel further includes a shielding portion 50. The arrangement position of the shielding portion 50 includes at least one of: the color film substrate 20 is arranged on one side far away from the array substrate 10, in the color film substrate 20, on one side of the color film substrate 20 close to the array substrate 10, on one side of the array substrate 10 close to the color film substrate 20, in the array substrate 10 and on one side of the array substrate 10 far away from the color film substrate 20. For example, the shielding portion 50 may be provided in one layer of the liquid crystal display panel, or the shielding portion 50 may be provided in two layers of the liquid crystal display panel. As shown in fig. 3, a two-layer shielding portion 50 is provided in the liquid crystal display panel, and is denoted by a first shielding portion 501 and a second shielding portion 502, respectively. In addition, the shielding portion 50 located at the same layer may include a plurality of shielding sub-portions.

The shielding portion 50 may be made of a material having high light shielding performance, and the material of the shielding portion 50 may be set to be the same as that of the black matrix 40. Alternatively, the material of the shielding portion 50 may be set to be different from that of the black matrix 40. Along the Z direction, the projection of the shielding portion 50 in the XY plane at least partially overlaps with the orthographic projection of the first subpixel 201 transmitting red light on the array substrate 10. For example, the projection of the shielding portion 50 in the XY plane is entirely located inside the projection of the first subpixel 201 in the XY plane. Alternatively, the partial projection of the shielding portion 50 in the XY plane is located within the projection of the first subpixel 201 in the XY plane. That is, all or part of the front projection of the shielding portion 50 on the array substrate 10 is only a portion covering the first sub-pixel 201, so as to partially shield the red light transmitted by the first sub-pixel 201, so as to solve the problem of poor red color of the liquid crystal display panel.

As shown in fig. 3, the cross section of the shielding portion 50 may be square, rectangular, semicircular, or the like in the XZ plane.

As shown in fig. 4A, in the XY plane, that is, the plane of the color film substrate 20, that is, the plane of the array substrate 10, the projection of the shielding portion 50 may be rectangular, square, cross, circular, polygonal, or the like. For example, the projection of the shielding portion 50 on the XY plane is one or more rectangles. Along the Y-direction, the shielding portion 50 may extend to both side edges of the first subpixel 201. Alternatively, the shielding part 50 may extend to both side edges of the first subpixel 201 in the X direction. As an example of expanding the shape of the shielding portion 50, as shown in fig. 4B and 4C, the shielding portion 50 includes two or more shielding sub-portions 503 which are arranged at intervals and are in the same layer. For example, the plurality of shielding sub-portions 503 are arranged at intervals in the Y direction to be combined into a rectangle, or the plurality of shielding sub-portions 503 are arranged at intervals in the X direction to be combined into a rectangle. Alternatively, the plurality of shielding sub-portions 503 are arranged in a circular shape to be combined into a circular shape or the like. The projection of one shielding sub-portion 503 in the XY plane may be circular, rectangular, triangular, or the like.

Fig. 5 is a schematic front view of a lcd panel according to an embodiment of the application when displaying an L0 frame. Fig. 6 is a schematic side view of a lcd panel according to an embodiment of the application when displaying an L0 frame. Fig. 7 is a schematic front view of a lcd panel according to an embodiment of the application when displaying an L255 frame. Fig. 8 is a schematic diagram of a side view of a lcd panel according to an embodiment of the application when displaying an L255 frame. In the embodiment of the present application, the liquid crystal display panel is schematically represented by a four-domain liquid crystal display mode, as shown in fig. 9. In the embodiment of the application, the viewing angle refers to the included angle between the normal direction of the display plane and the line of sight, the front viewing angle refers to the range of the viewing angle from 0 degree to 15 degrees, and the side viewing angle refers to the viewing angle greater than 15 degrees. The principle of improving the display quality of the lcd panel according to the embodiments of the present application will be described below with reference to fig. 5 to 8 by taking L0 and L255 frames as examples.

When the display panel displays the L0 frame, the display panel adopts a structure in which the shielding portion 50 is not provided, and the ratio of the aperture ratios of the first sub-pixel 201, the second sub-pixel 202, and the third sub-pixel 203 is 1:1:1. The light efficiency ratio of the transmitted light under the front view angle and the side view angle is 1:1:1. The display panel adopts the structure provided by the embodiment of the application for arranging the shielding part 50, the light efficiency ratio of the first sub-pixel 201, the second sub-pixel 202 and the third sub-pixel 203 is a:1:1, and the ratio under the front view angle and the side view angle is the same, wherein a is smaller than 1. Conventionally, the dispersion of red pixels in VA mode is higher than that of green and blue, so that the red defects are more likely to occur in the L0 picture, and the display panel structure provided by the embodiment of the application can effectively improve such defects by partially shielding the transmitted red light by the shielding part 50.

Under the condition that the display panel displays an L255 picture, the display panel adopts a structure without the shielding part 50, the ratio of the opening ratios of the first sub-pixel 201, the second sub-pixel 202 and the third sub-pixel 203 is 1:1:1, and the light efficiency ratio of the transmitted light under the front view angle and the side view angle is 1:1:1. The display panel adopts the liquid crystal display panel provided by the embodiment of the application, and the first liquid crystal group 301 is one of four domains in the four-domain liquid crystal display mode by using the shielding part 50 and the first liquid crystal group 301, wherein the first liquid crystal group 301 is used for preventing monochromatic light except corresponding red light from passing through the liquid crystal display panel. The front projection of the first liquid crystal set 301 on the array substrate 10 and the front projection of the sub-pixels other than the red light on the array substrate 10 are at least partially overlapped, so as to realize partial shielding of the light other than the red light.

As shown in fig. 7, only the front projection of the first liquid crystal group 301 on the array substrate 10 and the front projection of the second sub-pixel 202 on the array substrate 10 are at least partially overlapped, so as to partially shield the green light. Alternatively, only the front projection of the first liquid crystal group 301 on the array substrate 10 and the front projection of the third sub-pixel 203 on the array substrate 10 are at least partially overlapped, so as to partially shield blue light. Alternatively, as shown in fig. 7, the plurality of first liquid crystal groups 301 are disposed such that the front projection of one first liquid crystal group 301 on the array substrate 10 at least partially overlaps the front projection of the first sub-pixel 201 on the array substrate 10, the front projection of one first liquid crystal group 301 on the array substrate 10 at least partially overlaps the front projection of the second sub-pixel 202 on the array substrate 10, the front projection of one first liquid crystal group 301 on the array substrate 10 at least partially overlaps the front projection of the third sub-pixel 203 on the array substrate 10, and so on. By using the shielding portion 50 and the first liquid crystal set 301, the light efficiency ratio of the first sub-pixel 201, the second sub-pixel 202, and the third sub-pixel 203 at the front viewing angle is 1:1:1, and the light efficiency of the first sub-pixel 201, that is, the light efficiency of the transmitted red light is not changed, and accordingly, the light efficiency of the second sub-pixel 202 and the third sub-pixel 203 is reduced, so as to avoid color cast outside the red light. The light efficiency ratio of the first sub-pixel 201, the second sub-pixel 202 and the third sub-pixel 203 at the side view angle is b:1:1, wherein b <1. Therefore, the display panel provided by the embodiment of the application can reduce the light efficiency of the first sub-pixel 201 under the side view angle without changing the light efficiency of the display panel under the front view angle. In general, the problem of display reddening can be improved, and occurrence of other color shifts can be prevented. By using the first liquid crystal set 301 and the shielding portion 50, the amount of light to be shielded can be increased along the transmission direction of the light, and the light shielding effect can be improved.

Fig. 10A is a front view of the lcd panel without a shielding portion. Fig. 10B is a front view of a light effect diagram of a liquid crystal display panel according to an embodiment of the present application. Fig. 11A is a side view of the lcd panel without a shielding portion. Fig. 11B is a side view of a light effect diagram of a liquid crystal display panel according to an embodiment of the application.

As shown in fig. 10A, 10B, 11A, and 11B, the optical results of the lcd panel were simulated using tech wiz (a type of lcd design and simulation software). When the liquid crystal display panel provided by the embodiment of the application is adopted, the light efficiency ratio of the positive viewing angle is still 1:1:1 when one pixel unit displays an L255 picture. And the light efficiency ratio under the side view angle is 0.9:1:1, compared with green light and blue light, the transmittance of red light is reduced by 10 percent.

The chromaticity of the liquid crystal display panel was analyzed by CIE 1931, and the results obtained are shown in table 1 below. In table 1 theta represents the polar angle,representing azimuth, L0 (0.23.20) represents Wx is 0.23 and wy is 0.20.

Table 1 colorimetry contrast table of two LCD panels

Generally, color difference value of display panelThe smaller Wx-Wy represents the more severe the reddening of the display panel. As can be seen from the simulation results in table 1, in the structure in which the liquid crystal display panel is not provided with the shielding portion, the side view angle (θ=30°, ) And (θ=60°,) The L255 frame is significantly reddish. In contrast, with the structure of the display panel provided with the shielding part according to the embodiment of the application, the color coordinate of the front viewing angle is 0.28,0.29, and the color coordinate reddening phenomenon of the side viewing angle of the display panel is obviously improved, and Wx-Wy is obviously reduced.

In an exemplary embodiment, as shown in fig. 3 and 4A, the orthographic projection of the shielding portion 50 in the plane of the array substrate 10 is located at the middle of the first sub-pixel 201 along the X direction. For example, the orthographic projection of the shielding portion 50 in the plane of the array substrate 10 may include the center of the first sub-pixel 201 along the X direction, or the center of the orthographic projection of the shielding portion 50 in the plane of the array substrate 10 coincides with the center of the first sub-pixel 201 along the X direction.

In an exemplary embodiment, as shown in fig. 3, there is at least a partial overlap between the front projection of the shielding portion 50 on the array substrate 10 and the front projection of the first liquid crystal group 301 on the array substrate 10. For example, the front projection of the shielding portion 50 on the array substrate 10 is completely located within the front projection of the first liquid crystal set 301 on the array substrate 10.

In an exemplary embodiment, as shown in fig. 3, the shielding part 50 includes a first shielding part 501 and a second shielding part 502. The first shielding portion 501 and the second shielding portion 502 are located at different layers of the liquid crystal display panel. For example, the first shielding part 501 may be disposed at a side of the color film substrate 20 away from the array substrate 10, and the second shielding part 502 may be disposed at a side of the array substrate 10 close to the color film substrate 20. Or, the first shielding part 501 may be disposed on a side of the color film substrate 20 away from the array substrate 10, the second shielding part 502 may be disposed in the array substrate 10, etc., and the first shielding part 501 and the second shielding part 502 disposed on different layers are used in combination, so that the amount of light to be shielded can be increased along the transmission direction of the light, and the shielding effect can be improved.

In an exemplary embodiment, the projections of the first and second shielding portions 501 and 502 in the XY plane may be arranged such that there is at least partial overlap. For example, the projection of the first shielding portion 501 includes the projection of the second shielding portion 502, or the projection of the second shielding portion 502 includes the projection of the first shielding portion 501, or the projection of the first shielding portion 501 overlaps the projection of the second shielding portion 502, or the like.

In an exemplary embodiment, the projections of the first and second shielding portions 501 and 502 in the XY plane do not overlap. For example, a space in the X direction exists between the first shielding portion 501 and the second shielding portion 502. Alternatively, a space or the like in the Y direction exists between the first shielding portion 501 and the second shielding portion 502.

In an exemplary embodiment, as shown in fig. 3, the first shielding portion 501 is on the same layer as the black matrix 40 on the side of the color film substrate 20 away from the array substrate, and the material of the first shielding portion 501 is the same as the material of the black matrix 40. The first shielding portion 501 and the black matrix 40 may be obtained by the same process.

In an exemplary embodiment, as shown in fig. 3, the liquid crystal display panel is further provided with a common electrode layer 204 on a side of the color film substrate 20 near the array substrate 10. A pixel electrode layer 103 is further disposed on a side of the array substrate 10 close to the color film substrate 20. The liquid crystal layer 30 is disposed between the common electrode layer 204 and the pixel electrode layer 103. The liquid crystal layer 30 includes a plurality of liquid crystal molecules. The liquid crystal molecules may be negative liquid crystals. The plurality of liquid crystal molecules may form liquid crystal domains having different orientations under the driving of the common electrode layer 204 and the pixel electrode layer 103. For example, as shown in fig. 7, the liquid crystal layer 30 further includes a second liquid crystal group 302, a third liquid crystal group 303, and a fourth liquid crystal group (not shown in the drawing) to realize a four-domain liquid crystal display mode. Wherein, in the direction perpendicular to the array substrate, the second liquid crystal group 302 and the third liquid crystal group 303 may be disposed at both sides of the first liquid crystal group 301. The second liquid crystal set 302 and the third liquid crystal set 303 may be symmetrically disposed with respect to the first liquid crystal set 301. The alignment directions of the second liquid crystal set 302 and the third liquid crystal set 303 may be set to be symmetrical with respect to the first liquid crystal set 301. The alignment direction of the first liquid crystal group 301 may be set to be perpendicular to the plane in which the array substrate 10 is located, i.e., perpendicular to the XY plane. The alignment directions of the second liquid crystal group 302 and the third liquid crystal group 303 may be disposed obliquely, and the alignment direction of the fourth liquid crystal group may be disposed horizontally.

In an exemplary embodiment, as shown in fig. 3, 5 and 6, a plurality of metal wire layers may be included in the array substrate 10, the second shielding portion 502 may be disposed on one of the metal wire layers, and the material of the second shielding portion 502 is the same as that of the metal wire layer on which it is disposed. For example, the second shielding portion 502 may be located at the gate line layer 101 or at the data line layer 102. The gate line layer 101 includes a plurality of gate lines arranged at intervals, and the data line layer 102 includes a plurality of data lines arranged at intervals. The second shielding portion 502 may be provided as a metal line, for example, as a data line, or a gate line. When the second shielding portion 502 and the gate line layer 101 are arranged in the same layer, the second shielding portion can be obtained by the same process. When the second shielding portion 502 and the data line layer 102 are disposed in the same layer, the second shielding portion can be obtained by the same process. The electrical signal in the metal line used as the second shielding portion 502 may be a floating (floating) signal, a ground (com) signal, or the like.

In another embodiment of the present application, a display apparatus is provided. The display device comprises a backlight module and the liquid crystal display panel of any embodiment.

The backlight module generally includes a backlight substrate and a light emitting layer. The luminous layer is positioned above the surface of the backlight substrate facing the side of the liquid crystal display panel. The light-emitting layer comprises a plurality of light source units which are arranged on a backlight substrate in a matrix mode, each light source unit comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit which are arranged periodically, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are respectively used for emitting first monochromatic light, second monochromatic light and third monochromatic light, and the three light-emitting units form a light source unit to form a light source unit array which is used as a backlight source of liquid crystal display. The light emitting unit can adopt Mini LED or LED.

The display device in the embodiment of the application can be as follows: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

The "patterning process" referred to in this disclosure includes, for metallic materials, inorganic materials, or transparent conductive materials, processes such as photoresist coating, mask exposure, development, etching, photoresist stripping, and the like, and for organic materials, processes such as organic material coating, mask exposure, and development, and the like. The deposition may be any one or more of sputtering, evaporation, chemical vapor deposition, coating may be any one or more of spraying, spin coating, and ink jet printing, and etching may be any one or more of dry etching and wet etching, without limitation of the disclosure. "film" refers to a layer of film formed by depositing, coating, or other process a material on a substrate. The "film" may also be referred to as a "layer" if the "film" does not require a patterning process throughout the fabrication process. If the "thin film" requires a patterning process throughout the fabrication process, it is referred to as a "thin film" prior to the patterning process, and as a "layer" after the patterning process. The "layer" after the patterning process includes at least one "pattern".

In another embodiment of the present application, a method for manufacturing a liquid crystal display panel is also provided. The preparation method comprises the following steps:

manufacturing an array substrate 10 and a color film substrate 20.

Taking a bottom gate structure as an example, the fabrication process of the array substrate 10 is illustrated.

(1) And forming a gate metal layer pattern. In an exemplary embodiment, forming the gate metal layer pattern may include: depositing a first Metal film on a substrate, patterning the first Metal film through a first patterning process, and forming a Gate Metal layer pattern on the substrate.

(2) And forming a silicon island and a source drain metal layer pattern, wherein the silicon island comprises a gate insulating layer, an active layer and a doping layer. Specifically, the silicon island and the source-drain metal layer are formed simultaneously by adopting the same patterning process.

(3) A second insulating layer pattern is formed. In an exemplary embodiment, forming the second insulating layer pattern may include: and depositing a second insulating film on the substrate with the patterns, and patterning the second insulating film through a third patterning process to form a second insulating layer pattern covering the source drain metal pattern.

(4) The pixel electrode layer 103 is patterned. In an exemplary embodiment, forming the pixel electrode layer 103 pattern may include: and depositing a conductive film on the substrate with the patterns, patterning the conductive film through a fourth patterning process to form a conductive film covering the second insulating layer and the via holes arranged on the second insulating layer, wherein the conductive film is connected with the drain electrode through the via holes.

The manufacturing of the array substrate 10 and the color film substrate 20 further includes manufacturing of a shielding portion 50. The front projection of the shielding part 50 on the array substrate 10 is at least partially overlapped with the front projection of the sub-pixel transmitting red light on the array substrate 10.

And (3) carrying out box alignment on the manufactured color film substrate 20 and the array substrate 10, and filling a plurality of liquid crystal molecules between the color film substrate 20 and the array substrate 10 after box alignment, so as to form a liquid crystal layer 30. The liquid crystal layer 30 includes a first liquid crystal group 301, where the front projection of the first liquid crystal group 301 on the array substrate 10 and the front projection of the sub-pixels other than the transmitted red light on the array substrate 10 overlap at least partially. The first liquid crystal group 301 is used for preventing corresponding monochromatic light from passing through the liquid crystal display panel.

Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.

Claims

1. The liquid crystal display panel is characterized by comprising a color film substrate, a liquid crystal layer and an array substrate which are sequentially arranged; the liquid crystal display panel comprises a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels respectively transmitting different monochromatic lights;

the liquid crystal layer comprises a first liquid crystal group, the front projection of the first liquid crystal group on the array substrate and the front projection of the sub-pixels except the transmitted red light on the array substrate are at least partially overlapped, and the first liquid crystal group is used for preventing corresponding monochromatic light from passing through the liquid crystal display panel;

the liquid crystal layer also comprises a second liquid crystal group and a third liquid crystal group; in the direction perpendicular to the array substrate, the second liquid crystal group and the third liquid crystal group are arranged on two sides of the first liquid crystal group, the alignment direction of the second liquid crystal group and the alignment direction of the third liquid crystal group are symmetrical with respect to the first liquid crystal group, and the alignment direction of the first liquid crystal group is perpendicular to the plane where the array substrate is located.

2. The liquid crystal display panel according to claim 1, wherein the arrangement position of the shielding portion includes at least one of:

the color film substrate is arranged in the color film substrate;

the array substrate is arranged in the substrate;

3. The lcd panel of claim 1 or 2, wherein the front projection of the shielding portion on the array substrate is located in the middle of the front projection of the red-transmitting sub-pixel on the array substrate.

4. The liquid crystal display panel according to claim 1 or 2, wherein the front projection of the shielding portion on the array substrate is rectangular, cross-shaped or circular.

5. The liquid crystal display panel of claim 4, wherein the shielding portion comprises more than two shielding sub-portions arranged at intervals in the same layer.

6. The liquid crystal display panel according to claim 1 or 2, wherein the shielding portion includes a first shielding portion and a second shielding portion; the first shielding part and the second shielding part are positioned on different layers of the liquid crystal display panel.

7. The liquid crystal display panel of claim 6, wherein the front projection of the first shielding portion at the array substrate does not overlap or at least partially overlaps with the front projection of the second shielding portion at the array substrate.

8. The liquid crystal display panel of claim 6, further comprising a black matrix on a side of the color film substrate away from the array substrate, wherein the first shielding portion and the black matrix are the same layer, and the first shielding portion and the black matrix are the same material.

9. The liquid crystal display panel of claim 6, wherein the array substrate comprises a plurality of metal wire layers, the second shielding portion is disposed on one of the metal wire layers, and the material of the second shielding portion is the same as the material of the metal wire layer.

10. The liquid crystal display panel of claim 1 or 2, wherein there is at least partial overlap between the front projection of the first liquid crystal set on the array substrate and the front projection of the red-transmitting sub-pixel on the array substrate.

11. The liquid crystal display panel of claim 10, wherein there is at least a partial overlap between the front projection of the shielding portion on the array substrate and the front projection of the first liquid crystal group on the array substrate.

12. The liquid crystal display panel of claim 1 or 2, wherein one of the pixel units includes a first sub-pixel transmitting a first monochromatic light, a second sub-pixel transmitting a second monochromatic light, and a third sub-pixel transmitting a third monochromatic light;

wherein the first monochromatic light comprises red light, the second monochromatic light comprises green light, and the third monochromatic light comprises blue light;

and under the condition that the liquid crystal display panel displays an L255 picture, the light efficiency ratio of the first sub-pixel, the second sub-pixel and the third sub-pixel at a positive viewing angle is 1:1:1, and the light efficiency ratio of the first sub-pixel, the second sub-pixel and the third sub-pixel at a side viewing angle is b:1:1, wherein b <1.

13. A display device comprises a backlight module; a liquid crystal display panel according to any one of claims 1 to 12.

14. A method for producing a liquid crystal display panel, characterized by being used for producing the liquid crystal display panel according to any one of claims 1 to 12; the preparation method comprises the following steps: