A display panel, a preparation method thereof, and a display device

Abstract

Embodiments of the present disclosure provide a display panel, a preparation method thereof, and a display device, belonging to the field of display technologies, which can effectively improve the light transmittance of the display panel, increase the viewing angle of the display panel, and improve the color deviation problem when a human eye views the display surface from the side of the display panel, thereby improving the display effect of the display panel. The present disclosure includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate, and the liquid crystal layer includes chiral liquid crystal molecules. The display panel further includes a plurality of sub-pixels; each sub-pixel is divided into 2n domain regions arranged side by side along a first direction, where n≥1 and n is an integer; in each sub-pixel, the initial arrangements of the chiral liquid crystal molecules in different domain regions are different.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of display, and particularly relates to a display panel, a preparation method thereof, and a display device. Background Art

[0002] Liquid crystal displays have been increasingly widely used in modern life, such as mobile phone displays, laptop computer displays, GPS displays, liquid crystal TV displays, etc. With the progress of science and technology, traditional single-domain liquid crystal displays can no longer meet people's requirements for liquid crystal displays due to disadvantages such as low contrast, asymmetric viewing angles, and color deviation when viewing the display screen at different angles. Multi-domain display technology is currently widely used in the display field because it can improve the asymmetric viewing angle of liquid crystal displays, increase the viewing angle, improve the contrast, improve the gray-scale inversion, and effectively improve color deviation.

[0003] Take Figure 1 as an example. To achieve multi-domain display of a liquid crystal display, in the prior art, the alignment layer in the liquid crystal display is often divided into four alignment regions in the corresponding area of each sub-pixel, and then the four alignment regions are respectively exposed and aligned. The exposure and alignment process is to irradiate the four alignment regions with linearly polarized ultraviolet light respectively, and the directions of the linearly polarized ultraviolet light irradiating the four alignment regions are different. Since there are light-seeking molecules on the surface of the alignment layer, under the irradiation of linearly polarized ultraviolet light, the light-seeking molecules will undergo reactions such as photoaddition, photodegradation, or photoisomerization in the direction parallel to the polarized light, thereby generating surface anisotropy, and further enabling the liquid crystal molecules to form anisotropic arrangements. Specifically, the liquid crystal molecules in the four domain regions in each sub-pixel have different initial orientation directions, thus forming multi-domain display. As Figure 2 shown, using this processing method often causes low light transmittance regions to be generated in the sub-pixels, specifically manifested as "horizontal dark lines" and "vertical dark lines" in the sub-pixels. The specific reasons are as follows: In the prior art, nematic liquid crystals are often used as liquid crystal materials, and nematic liquid crystal molecules have the property that the pretilt angle of each liquid crystal molecule is the same. Due to the existence of an exposure overlap part at the edge of adjacent domain regions on the alignment layer, the exposure overlap part will generate an arrangement of nematic liquid crystal molecules with a pretilt angle of about 90°. When polarized light passes through this part, the polarization direction does not change. Since the polarization direction of the polarized light is the same as the transmission direction of the lower polarizer, and the transmission directions of the upper and lower polarizers are perpendicular to each other, the polarized light passing through this part cannot pass through the upper polarizer, so a completely opaque horizontal dark line is generated at the pixel edge. Similarly, the reason for the generation of vertical dark lines is that the electric field at the edge of adjacent sub-pixels is chaotic, resulting in an arrangement of nematic liquid crystal molecules with a pretilt angle of about 90° in the edge region. Since the pretilt angles of the nematic liquid crystal molecules in the above-mentioned low light transmittance region are the same and all 90°, this region is completely opaque, significantly reducing the light transmittance of the liquid crystal display and being unfavorable for improving the display effect of the liquid crystal display. SUMMARY OF THE INVENTION

[0004] The present disclosure aims to improve the existing liquid crystal display panel. To solve the problem that there are low light transmittance regions in the existing liquid crystal display panel, which affect the display effect of the display device, the present disclosure adopts the following technical solutions.

[0005] In a first aspect, an embodiment of the present disclosure provides a display panel, which includes a first substrate and a second substrate arranged opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer includes liquid crystal molecules; characterized in that the display panel includes a plurality of sub-pixels; each of the sub-pixels is divided into 2n domain regions arranged side by side along a first direction, n≥1, and n is an integer; in the sub-pixel, the initial arrangements of the liquid crystal molecules in different domain regions are different; the liquid crystal molecules are chiral liquid crystal molecules.

[0006] Wherein, the first substrate includes a first substrate and a first alignment layer located on the side of the first substrate close to the liquid crystal layer; the second substrate includes a second substrate and a second alignment layer located on the side of the second substrate close to the liquid crystal layer;

[0007] When n = 1, the optical alignment directions of the first alignment layers in the two domain regions of the sub-pixel are different, and in the domain regions of the sub-pixels adjacent to each other in the first direction, the optical alignment directions of the first alignment layers are symmetrically arranged along a second direction; or, the optical alignment directions of the second alignment layers in the two domain regions of the sub-pixel are different; and in the domain regions of the sub-pixels adjacent to each other in the first direction, the optical alignment directions of the second alignment layers are symmetrically arranged along a second direction.

[0008] Wherein, the first substrate includes a first substrate and a first alignment layer located on the side of the first substrate close to the liquid crystal layer; the second substrate includes a second substrate and a second alignment layer located on the side of the second substrate close to the liquid crystal layer;

[0009] When n≥2, both the first alignment layer and the second alignment layer in each sub-pixel include 2n sub-regions arranged side by side along the first direction, and one sub-region corresponds to one domain region; the 2n sub-regions of the first alignment layer and the second alignment layer in the sub-pixel each include n optical alignment regions, and the optical alignment directions of the optical alignment regions are different; the projections of the n optical alignment regions of the first alignment layer in the sub-pixel on the second alignment layer do not coincide with the n optical alignment regions of the second alignment layer in the sub-pixel.

[0010] Wherein, n = 2.

[0011] Among them, in the sub-pixel, n alignment regions of the first alignment layer are arranged adjacent to each other, and / or n alignment regions of the second alignment layer are arranged adjacent to each other.

[0012] Among them, in the sub-pixel, the n alignment regions of the first alignment layer are arranged at intervals, and / or the n alignment regions of the second alignment layer are arranged at intervals.

[0013] Among them, n = 2. In the sub-pixel, the two photo-alignment regions of the first alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; the two photo-alignment regions of the second alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite;

[0014] The four domain regions in the sub-pixel are respectively a first domain region, a second domain region, a third domain region, and a fourth domain region; the photo-alignment direction of the first alignment layer in the first domain region is opposite to the photo-alignment direction of the second alignment layer in the second domain region; the photo-alignment direction of the first alignment layer in the third domain region is opposite to the photo-alignment direction of the second alignment layer in the fourth domain region.

[0015] Among them, n = 2. In the sub-pixel, the two photo-alignment regions of the first alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; the two photo-alignment regions of the second alignment layer are arranged at intervals, and the light distribution directions of the first alignment layer in the two photo-alignment regions are opposite;

[0016] The four domain regions in the sub-pixel are respectively a first domain region, a second domain region, a third domain region, and a fourth domain region; the photo-alignment direction of the second alignment layer in the first domain region is opposite to the photo-alignment direction of the first alignment layer in the second domain region; the photo-alignment direction of the second alignment layer in the third domain region is opposite to the photo-alignment direction of the first alignment layer in the fourth domain region.

[0017] Among them, the first substrate and the second substrate are arranged opposite to each other to form a liquid crystal cell; the cell thickness of the liquid crystal cell is 1 / 4 of the pitch of the chiral liquid crystal molecules.

[0018] Among them, the cell thickness of the liquid crystal cell is 2.8 - 3.6 μm, and the pitch of the chiral liquid crystal molecules is 11.2 - 14.4 μm.

[0019] In a second aspect, an embodiment of the present disclosure provides a method for manufacturing a display panel, which includes: forming a first substrate, a second substrate, and injecting liquid crystal molecules between the first substrate and the second substrate to form a liquid crystal layer; the method further includes forming a plurality of sub-pixels; wherein, each of the sub-pixels is divided into 2n domain regions arranged side by side along a first direction, n≥1 and n is an integer; in the sub-pixel, the initial arrangements of the liquid crystal molecules in different domain regions are different; the liquid crystal molecules are chiral liquid crystal molecules.

[0020] Among them, forming the first substrate includes forming a first alignment layer on the first substrate substrate; forming the second substrate includes forming a second alignment layer on the second substrate substrate;

[0021] When n = 1, the step of forming the 2 domain regions of the sub-pixel includes:

[0022] Exposing the first alignment layers in the 2 domain regions of the sub-pixel respectively, so that the photo-alignment directions of the first alignment layers in the 2 domain regions are different;

[0023] Or,

[0024] Exposing the second alignment layers in the 2 domain regions of the sub-pixel respectively, so that the photo-alignment directions of the first alignment layers in the 2 domain regions are different.

[0025] Among them, forming the second substrate includes forming the second alignment layer on the second substrate substrate;

[0026] When n≥2, the step of forming the 2n domain regions of the sub-pixel includes:

[0027] Exposing the first alignment layers in the n domain regions of the sub-pixel respectively, so that the photo-alignment directions of the first alignment layers in the n domain regions are different;

[0028] Exposing the second alignment layers in the n domain regions of the sub-pixel respectively, so that the photo-alignment directions of the first alignment layers in the 2 domain regions are different; the projection of the exposure region of the first alignment layer on the second alignment layer does not coincide with the exposure region of the second alignment layer.

[0029] In a third aspect, an embodiment of the present disclosure provides a display device, which includes the above-mentioned display panel. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of the division of the photo-alignment region in an exemplary four-domain display device;

[0031] Figure 2 It is a schematic diagram of the display effect of an exemplary sub-pixel;

[0032] Figure 3 It is a cross-sectional view of an exemplary display panel;

[0033] Figure 4 It is a schematic diagram of the influence of liquid crystal molecules on linearly polarized light;

[0034] Figure 5 It is a schematic structural diagram of an exemplary display panel;

[0035] Figure 6 It is a cross-sectional view of a display panel according to an embodiment of the present disclosure;

[0036] Figure 7 It is a schematic diagram of the arrangement of chiral liquid crystal molecules according to an embodiment of the present disclosure;

[0037] Figure 8 It is a schematic diagram of the rotation mode of chiral liquid crystal molecules according to an embodiment of the present disclosure;

[0038] Figure 9a It is a schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0039] Figure 9b It is a schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0040] Figure 9c It is a schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0041] Figure 9d It is a schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0042] Figure 10a It is a schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0043] Figure 10b It is a schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0044] Figure 10c It is a schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0045] Figure 11a It is a schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0046] Figure 11b It is a schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0047] Figure 11c It is a schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0048] Figure 11aSchematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0049] Figure 11b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0050] Figure 11c Schematic diagram of the display effect of sub-pixels according to an embodiment of the present disclosure;

[0051] Figure 12a Schematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0052] Figure 12b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0053] Figure 12c Schematic diagram of the display effect of sub-pixels according to an embodiment of the present disclosure;

[0054] Figure 13a Schematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0055] Figure 13b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0056] Figure 13c Schematic diagram of the display effect of sub-pixels according to an embodiment of the present disclosure;

[0057] Figure 14a Schematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0058] Figure 14b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0059] Figure 14c Schematic diagram of the display effect of sub-pixels according to an embodiment of the present disclosure;

[0060] Figure 15a Schematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0061] Figure 15b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0062] Figure 15c Schematic diagram of the display effect of sub-pixels according to an embodiment of the present disclosure;

[0063] Figure 16a Schematic diagram of the division of the photo-alignment area according to an embodiment of the present disclosure;

[0064] Figure 16bSchematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0065] Figure 16c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0066] Figure 17a Schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0067] Figure 17b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0068] Figure 17c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0069] Figure 18a Schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0070] Figure 18b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0071] Figure 18c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0072] Figure 19a Schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0073] Figure 19b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0074] Figure 19c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0075] Figure 20a Schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0076] Figure 20b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0077] Figure 20c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0078] Figure 21a Schematic diagram of the division of an optical alignment region according to an embodiment of the present disclosure;

[0079] Figure 21b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0080] Figure 21cSchematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0081] Figure 22a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0082] Figure 22b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell of an embodiment of the present disclosure;

[0083] Figure 22c Schematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0084] Figure 23a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0085] Figure 23b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell of an embodiment of the present disclosure;

[0086] Figure 23c Schematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0087] Figure 24a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0088] Figure 24b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell of an embodiment of the present disclosure;

[0089] Figure 24c Schematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0090] Figure 25a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0091] Figure 25b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell of an embodiment of the present disclosure;

[0092] Figure 25c Schematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0093] Figure 26a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0094] Figure 26b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell of an embodiment of the present disclosure;

[0095] Figure 26c Schematic diagram of the sub-pixel display effect of an embodiment of the present disclosure;

[0096] Figure 27a Schematic diagram of the division of the photo-alignment area of an embodiment of the present disclosure;

[0097] Figure 27b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0098] Figure 27c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0099] Figure 28a Schematic diagram of the division of a photo-alignment area according to an embodiment of the present disclosure;

[0100] Figure 28b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0101] Figure 28c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0102] Figure 29a Schematic diagram of the division of a photo-alignment area according to an embodiment of the present disclosure;

[0103] Figure 29b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0104] Figure 29c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0105] Figure 30a Schematic diagram of the division of a photo-alignment area according to an embodiment of the present disclosure;

[0106] Figure 30b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0107] Figure 30c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0108] Figure 31a Schematic diagram of the division of a photo-alignment area according to an embodiment of the present disclosure;

[0109] Figure 31b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0110] Figure 31c Schematic diagram of the display effect of a sub-pixel according to an embodiment of the present disclosure;

[0111] Figure 32a Schematic diagram of the division of a photo-alignment area according to an embodiment of the present disclosure;

[0112] Figure 32b Schematic diagram of the morphology of chiral liquid crystal molecules in a liquid crystal cell according to an embodiment of the present disclosure;

[0113] Figure 32c Schematic diagram of a sub-pixel display effect according to an embodiment of the present disclosure;

[0114] Figure 33 Flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure;

[0115] Figure 34 Flowchart of another method for manufacturing a display panel according to an embodiment of the present disclosure. Detailed implementation manners

[0116] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0117] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "include" or "comprise" mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms such as "connect" or "couple" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0118] Figure 3 Schematic cross-sectional view of a liquid crystal display panel in the prior art, as Figure 3 shown, the liquid crystal display panel is composed of a first substrate 1, a second substrate 2, and a liquid crystal layer 4 between the first substrate 1 and the second substrate 2; the liquid crystal layer 4 includes nematic liquid crystal molecules, the first substrate 1 includes a first substrate 101 and a first alignment layer 102 provided on the side of the first substrate 101 close to the liquid crystal layer 4, and the second substrate 2 includes a second substrate 201 and a first alignment layer 102 provided on the side of the second substrate 201 close to the liquid crystal layer 4; a first polarizer 301 is provided on the side of the first substrate 1 facing away from the liquid crystal layer 4, a second polarizer 302 is provided on the side of the second substrate 2 facing away from the liquid crystal layer 4, and the transmission axis directions of the first polarizer 301 and the second polarizer 302 are perpendicular to each other. When light passes through the first polarizer 301, linearly polarized light consistent with the transmission axis direction of the first polarizer 301 will be formed. Figure 4 Schematic diagram of the influence of liquid crystal molecules on linearly polarized light; asFigure 4 As shown, when the nematic liquid crystal molecules in the liquid crystal layer 4 are arranged in a specific orientation, the polarization direction of the linearly polarized light passing through it can be changed, and this change is related to the orientation of the liquid crystal molecules. After the polarization direction of the linearly polarized light passing through the first polarizer 301 is changed by the liquid crystal molecules, the polarization direction of the linearly polarized light is no longer perpendicular to the transmission direction of the second polarizer 302. Therefore, at least part of the linearly polarized light can pass through the second polarizer 302, and the display surface of the liquid crystal display panel emits light. When the long axis direction of the nematic liquid crystal molecules is perpendicular to the plane where the first polarizer 301 is located, the polarization direction of the linearly polarized light passing through the first polarizer 301 is not affected by the liquid crystal molecules. Therefore, it is still perpendicular to the transmission direction of the second polarizer 302, so the linearly polarized light cannot pass through the second polarizer 302, and the display surface of the liquid crystal display panel does not emit light.

[0119] Viewing angle characteristics are one of the important performance parameters of liquid crystal displays and are also unique problems of liquid crystal displays themselves. Since liquid crystal displays use light emitted by a backlight and are equipped with two polarizers, the display effects obtained by observing the liquid crystal display from different angles will be different. Different liquid crystal display modes will have different viewing angle characteristics. Generally, people use the method of setting a phase compensation film to increase the viewing angle. In addition, the color deviation phenomenon is also related to the viewing angle characteristics, that is, when observing the liquid crystal display from different azimuth angles and viewing angles, the image will show color changes. To solve the color deviation phenomenon, people usually also use compensation films to achieve it. However, for ordinary liquid crystal displays, it is relatively difficult to solve the viewing angle and color problems at the same time. For this reason, researchers have developed a liquid crystal display mode with good viewing angle characteristics and the method of configuring a phase compensation film, such as the Multiple Domain Mode, so as to obtain the best viewing angle characteristics and the smallest color deviation.

[0120] Figure 5 It is a schematic structural diagram of an exemplary display panel, as Figure 5 shown, the display panel includes a plurality of pixel units 0, and each pixel unit 0 includes three sub-pixels 01, and the three sub-pixels 01 respectively realize the display of three colors: red, green, and blue; as Figure 1As shown, the second alignment layer 202 in each sub-pixel 01 is divided into four domain regions arranged along a first direction, and the optical alignment directions of the respective domain regions are different. The material of the second alignment layer 202 includes light-seeking molecules. Under the irradiation of linearly polarized ultraviolet light, the light-seeking molecules will undergo reactions such as photoaddition, photodegradation, or photoisomerization in the direction parallel to the polarized light, thereby generating surface anisotropy. Furthermore, it can cause the liquid crystal molecules in contact with the surface of the alignment layer to form an anisotropic arrangement, such that the initial orientation directions of the nematic liquid crystal molecules on the four domain regions are different. Also, because the nematic liquid crystal molecules remain parallel or nearly parallel to each other in the direction of the molecular long axis, by making the initial orientation directions of the nematic liquid crystal molecules on the four domain regions different, it is possible to form multiple regions with different initial orientations of liquid crystal molecules in the liquid crystal layer 4 of one sub-pixel 01, thereby realizing multi-domain display.

[0121] In the disclosure, the first direction and the second direction are two intersecting directions. For example: the first direction is the row direction, and the second direction is the column direction; or, the first direction is the column direction, and the second direction is the row direction; In the present disclosure, the case where the first direction is the column direction and the second direction is the row direction is taken as an example for illustration.

[0122] In addition, in the embodiments of the present disclosure, the initial pretilt angle of the alignment layer is formed by optical alignment (exposure). In some examples, the initial pretilt angle of the alignment layer can also be formed by rubbing.

[0123] Figure 2 FIG. is a schematic diagram of the display effect of a sub-pixel 01 in the prior art, as Figure 2 shown, using the above method in combination with nematic liquid crystals will cause low transmittance regions to be generated in the sub-pixel 01, specifically manifested as multiple "horizontal dark lines" and "vertical dark lines" being generated in the sub-pixel 01. The specific reasons are as follows: When exposing each domain region on the alignment layer with linearly polarized ultraviolet light, due to the influence of processing capabilities, there is an exposure overlap part at the edge of adjacent domain regions. The exposure overlap part will generate a region where the nematic liquid crystal molecules are arranged with a pretilt angle of approximately 90°, that is, the long axis directions of the nematic liquid crystal molecules in this region are all perpendicular to the plane where the first polarizer 301 is located. Therefore, this region is a low transmittance region that is opaque, manifested as a "horizontal dark line". Similarly, due to the chaotic edge electric field between adjacent sub-pixels 01, a region where the nematic liquid crystal molecules are arranged with a pretilt angle of approximately 90° is generated in the edge region of the sub-pixel 01. Therefore, "vertical dark lines" are generated in the sub-pixel 01. The low transmittance regions in the sub-pixel 01 will significantly reduce the transmittance of the liquid crystal display, which is not conducive to improving the display effect of the liquid crystal display.

[0124] To solve the above problems existing in the prior art, the embodiments of the present disclosure provide a display panel, a manufacturing method thereof, and a display device. The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0125] In a first aspect, Figure 6 FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, which includes a first substrate 1 and a second substrate 2 disposed opposite to each other, and a liquid crystal layer 4 disposed between the first substrate 1 and the second substrate 2. The liquid crystal layer 4 is formed by filling chiral liquid crystal molecules; the display panel includes a plurality of sub-pixels 01, and each sub-pixel 01 is divided into 2n domain regions arranged side by side along a first direction, where n≥1 and n is an integer; in each sub-pixel 01, the initial arrangements of the chiral liquid crystal molecules in different domain regions are different. Figure 7 FIG. 2 is a schematic diagram of the arrangement of chiral liquid crystal molecules. As Figure 7 shown, the chiral liquid crystal molecules are flat and arranged in layers. The liquid crystal molecules in the same layer are parallel to each other, and the long axes of the liquid crystal molecules are parallel to the layer plane; the long axis directions of the liquid crystal molecules in different layers change slightly and are arranged in a helical structure around the normal direction. When the arrangement of the chiral liquid crystal molecules rotates 360° and returns to the original direction, the distance between two layers with exactly the same molecular arrangement is called the pitch d1 of the chiral liquid crystal molecules. The first substrate 1 and the second substrate 2 are disposed opposite to each other to form a liquid crystal cell, and the cell thickness d2 of the liquid crystal cell is 1 / 4 of the pitch d1 of the chiral liquid crystal molecules. Due to the structural characteristics of the chiral liquid crystal molecules arranged in a helical shape in the vertical direction, the long axis orientations of the chiral liquid crystal molecules in the same region will not be exactly the same. Therefore, compared with nematic liquid crystal molecules, there will be no completely light-blocking regions in each sub-pixel 01. Actual observations have found that when chiral liquid crystal molecules are used as the liquid crystal material, the "dark lines" in each sub-pixel 01 region are lighter. The liquid crystal display panel using chiral liquid crystal molecules as the liquid crystal material can effectively improve the light transmittance and significantly improve the display effect.

[0126] Since each sub-pixel 01 in the display panel according to the embodiment of the present disclosure has 2n domain regions and the initial arrangements of the chiral liquid crystal molecules in different domain regions are different, the display panel has a larger viewing angle. Moreover, due to the rotational characteristics of the chiral liquid crystal molecules, light can pass through between two domain regions and at the edge portions of the domain regions, so the shadow will be reduced and the display effect will be significantly improved.

[0127] In some examples, as Figure 6 shown, the first substrate 1 includes a first substrate 101 and a first alignment layer located on the side of the first substrate 101 close to the liquid crystal layer 4, and the second substrate 2 includes a second substrate 201 and a second alignment layer located on the side of the second substrate 201 close to the liquid crystal layer 4.

[0128] When n = 1, each sub-pixel 01 of the above display panel is divided into two domain regions arranged side by side in the first direction. The photo-alignment directions of the first alignment layer in the two domain regions of each sub-pixel 01 are different, and the photo-alignment directions of the first alignment layer in the two domain regions of each sub-pixel 01 are symmetrically arranged in the second direction. That is, when exposing the first alignment layer, the optical paths of the light irradiated on the first alignment layer in the two domain regions of each sub-pixel 01 are symmetric in the second direction, so that the photo-tropic molecules on the first alignment layer in the two domain regions of each sub-pixel 01 generate anisotropies of different properties, making the initial orientations of the chiral liquid crystal molecules in the two domain regions of each sub-pixel 01 different. Since the chiral liquid crystal molecules in each sub-pixel are arranged in a helical structure, light can pass through between the two domain regions of each sub-pixel and at the edge portions of the domain regions, and the "dark lines" in the sub-pixels are shallower. Therefore, compared with the display panel using nematic liquid crystal molecules, the above display panel has better light transmittance while increasing the display viewing angle, and the display effect is significantly improved. In some examples, when n = 1, the photo-alignment directions of the second alignment layer in the two domain regions of each sub-pixel 01 of the above display panel are different, and the photo-alignment directions of the second alignment layer in the two domain regions of each sub-pixel 01 are symmetrically arranged in the second direction. Such a display panel can also increase the viewing angle and improve the light transmittance, and the display effect is significantly improved.

[0129] In some examples, when n ≥ 2, both the first alignment layer and the second alignment layer in each sub-pixel 01 include 2n sub-regions arranged side by side in the first direction, and one sub-region is correspondingly arranged with one domain region. The 2n sub-regions of the first alignment layer and the second alignment layer in each sub-pixel 01 each include n photo-alignment regions, and the alignment directions of the n photo-alignment regions on each alignment layer are different. The projection of the n photo-alignment regions of the first alignment layer in the sub-pixel 01 on the second alignment layer does not coincide with the n photo-alignment regions of the second alignment layer in the sub-pixel 01.

[0130] For example, when n = 2, each sub-pixel 01 includes 4 domain regions. The first alignment layer and the second alignment layer in each sub-pixel 01 both include 4 sub-regions arranged side by side in the first direction, and one sub-region is correspondingly arranged with one domain region. Among the 4 sub-regions on the first alignment layer, 2 are photo-alignment regions, and among the four sub-regions on the second alignment layer, there are also 2 photo-alignment regions. The photo-alignment directions of the 2 photo-alignment regions on each alignment layer are different. The projections of the 2 photo-alignment regions on the first alignment layer in each sub-pixel 01 on the second alignment layer do not coincide with the photo-alignment regions on the second alignment layer. In this setting scheme of the display panel, there are 2 photo-alignment regions respectively on the upper and lower alignment layers of one sub-pixel 01, and the photo-sensitive molecules on the 2 photo-alignment regions on each alignment layer have anisotropies of different properties, enabling each alignment layer to make the chiral liquid crystal molecules of one sub-pixel 01 form 2 different initial orientations. Due to the structural characteristic that the chiral liquid crystal molecules are arranged in a spiral shape in the vertical direction, the relatively arranged first alignment layer and second alignment layer can make the chiral liquid crystal molecules of one sub-pixel 01 form 4 different initial orientations, that is, each sub-pixel 01 of the display panel has four domain directions. In practical applications, the display device using this display panel can ensure that there is no color deviation problem when the human eye views from the four directions of up, down, left, and right, greatly increasing the viewing angle of the display device. In addition, since the above display panel uses chiral liquid crystal molecules as the liquid crystal material, the chiral liquid crystal molecules in each sub-pixel are arranged in a spiral structure, and light can pass through between the two domain regions of each sub-pixel and at the edge part of the domain region, and the "dark line" in the sub-pixel is shallower, so the light transmittance of the display panel is effectively improved, and the display effect of the display panel is improved.

[0131] In some examples, the n alignment regions of the first alignment layer are arranged adjacent to each other, and / or, the n alignment regions of the second alignment layer are arranged adjacent to each other. Taking n = 2 as an example, the 2 alignment regions of the first alignment layer and the 2 alignment regions of the second alignment layer can adopt the following four setting methods:

[0132] The 2 alignment regions of the first alignment layer are arranged adjacent to each other, and the 2 alignment regions of the second alignment layer are arranged adjacent to each other. Specific examples are as Figure 14a 、 15a 、16a、17a、29a、30a、31a、32a

[0133] The 2 alignment regions of the first alignment layer are arranged adjacent to each other, and the 2 alignment regions of the second alignment layer are arranged at intervals. Specific examples are as Figure 22a 、 23a 、24a、25a.

[0134] The 2 alignment regions of the first alignment layer are arranged at intervals, and the 2 alignment regions of the second alignment layer are arranged at intervals. Specific examples are as Figure 9a 、 10a, 11a, 12a, 13a, 26a, 27a, 28a.

[0135] The two alignment regions of the first alignment layer are arranged at intervals, and the two alignment regions of the second alignment layer are arranged adjacent to each other. Specific examples are as Figure 18a , 19a , 20a, 21a.

[0136] When n = 2, the above four methods for setting the alignment regions can all form four domain regions with different initial orientations of internal liquid crystal molecules in each sub-pixel 01, effectively increasing the viewing angle of the display panel and improving the color deviation problem when viewing the display panel from the side. In some examples, the first substrate 1 and the second substrate 2 are arranged opposite to each other to form a liquid crystal cell, and the cell thickness d2 of the liquid crystal cell is 1 / 4 of the pitch d1 of the chiral liquid crystal molecules. When the cell thickness d2 of the liquid crystal cell is 1 / 4 of the pitch d1 of the chiral liquid crystal molecules, the chiral liquid crystal molecules are restricted by the cell thickness d2. Therefore, the arrangement of the chiral liquid crystal molecules in the vertical direction can only rotate by 90°. This setting scheme can make the "dark line" in a sub-pixel 01 generated at a position closer to the edge of the sub-pixel 01. Since materials that make it difficult for light to pass through, such as a black matrix and conduction lines, are provided in the edge region of the sub-pixel 01 itself, when the "dark line" in the sub-pixel 01 is generated at a position closer to the edge, the shadow in the light-transmitting region of the sub-pixel 01 is significantly reduced, effectively improving the light transmittance of the display panel and the display effect of the display panel.

[0137] In some examples, the pitch d1 of the chiral liquid crystal molecules is 11.2 - 14.4 μm. When the display panel has four domain directions, each sub-pixel 01 of the display panel has 4 domain regions, that is, the cell thickness d2 of the liquid crystal cell is 1 / 4 of the pitch d1 of the chiral liquid crystal molecules, and the cell thickness d2 of the liquid crystal cell is 2.8 - 3.6 μm. This setting scheme of the liquid crystal cell can achieve the rotation of liquid crystal molecules from 0° to 90°. Figure 8 Schematic diagram of the rotation mode of chiral liquid crystal molecules implemented in the present disclosure; as Figure 8 shown, the morphology of chiral liquid crystal molecules on the photo-alignment region of the first alignment layer 102 and the morphology of chiral liquid crystal molecules on the photo-alignment region of the second alignment layer 202 are represented as the initial state T1 of the chiral liquid crystal molecules. The morphology of the chiral liquid crystal molecules at the middle position of the liquid crystal cell is represented as the intermediate state T2 of the liquid crystal molecules. The morphology after the chiral liquid crystal molecules in the initial state T1 rotate by 90° is the termination state T3 of the chiral liquid crystal molecules. The rotation direction of the chiral liquid crystal molecules on the photo-alignment region of the first alignment layer is the direction F1, and the direction F1 is counterclockwise. The rotation direction of the chiral liquid crystal molecules on the photo-alignment region of the second alignment layer is the direction F2, and the direction F2 is clockwise.

[0138] In some examples, n = 2. In each sub-pixel, two photo-alignment regions of the first alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; two photo-alignment regions of the second alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite. The four domain regions in each sub-pixel are the first domain region, the second domain region, the third domain region, and the fourth domain region respectively; the photo-alignment direction of the first alignment layer in the first domain region is opposite to the photo-alignment direction of the second alignment layer in the second domain region; the photo-alignment direction of the first alignment layer in the third domain region is opposite to the photo-alignment direction of the second alignment layer in the fourth domain region.

[0139] For example, as Figure 9a shown, the four domain regions in each sub-pixel are the fourth domain region, the third domain region, the second domain region, and the first domain region arranged along the first direction, the first domain region. The first alignment layers in the first domain region and the third domain region in each sub-pixel are photo-alignment regions, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; specifically, when the first alignment layer in the first domain region is exposed, the illumination direction is from left to right, and when the first alignment layer in the third domain region is exposed, the illumination direction is from right to left. The second alignment layers in the second domain region and the fourth domain region in each sub-pixel are photo-alignment regions, and the photo-alignment directions of the second alignment layer in the two photo-alignment regions are opposite. When the second alignment layer in the second domain region is exposed, the illumination direction is from right to left, and when the second alignment layer in the fourth domain region is exposed, the illumination direction is from left to right. The pitch d1 of the chiral liquid crystal molecules in this display panel is preferably 12.8 μm, and the cell gap d2 of the liquid crystal cell is 3.2 μm. After cell assembly, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region in the liquid crystal cell are as Figure 9b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 9c shown, that is, the number of "horizontal dark lines" is 3, and the number of "vertical dark lines" is 2. The actual display effect of each sub-pixel 01 is as Figure 9d shown. For the display panel made by the above scheme, the number of "dark lines" generated in each sub-pixel 01 is the least, and the area of the low light transmittance region is also the smallest, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel. It should be noted that, in order to more clearly show the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules, in Figure 9b the shape of the liquid crystal molecules is represented by a cone, but it does not represent the actual shape of the molecules. The reason for using a cone to represent is to use the tip of the cone to represent the side away from the display surface and the wide end to represent the side close to the display surface.

[0140] In some examples, n = 2. In each sub-pixel, the two photo-alignment regions of the first alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; the two photo-alignment regions of the second alignment layer are arranged at intervals, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite. The four domain regions in each sub-pixel are the first domain region, the second domain region, the third domain region, and the fourth domain region respectively; the photo-alignment direction of the second alignment layer in the first domain region is opposite to the photo-alignment direction of the first alignment layer in the second domain region; the photo-alignment direction of the second alignment layer in the third domain region is opposite to the photo-alignment direction of the first alignment layer in the fourth domain region.

[0141] For example, as Figure 10a shown, the four domain regions in each sub-pixel are the fourth domain region, the third domain region, the second domain region, and the first domain region arranged along the first direction, the first domain region. The first alignment layers in the second domain region and the fourth domain region in each sub-pixel are photo-alignment regions, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite. Specifically, when the first alignment layer in the second domain region is exposed, the illumination direction is from left to right, and when the first alignment layer in the fourth domain region is exposed, the illumination direction is; the second alignment layers in the first domain region and the third domain region in each sub-pixel are photo-alignment regions, and the photo-alignment directions of the second alignment layer in the two photo-alignment regions are opposite. Specifically, when the second alignment layer in the first domain region is exposed, the illumination direction is from right to left, and when the second alignment layer in the third domain region is exposed, the illumination direction is from left to right. The pitch d1 of the chiral liquid crystal molecules in such a display panel is preferably 12.8 μm, and the cell gap d2 of the liquid crystal cell is 3.2 μm. After cell assembly, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region in the liquid crystal cell are as Figure 10b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 10c shown, that is, the number of "horizontal dark lines" is 3, and the number of "vertical dark lines" is 2. In the display panel made by the above scheme, the number of "dark lines" generated in each sub-pixel 01 is the least, the area of the low light transmittance region is also the smallest, and compared with the display panel using nematic liquid crystal molecule materials, the shadow in each sub-pixel of the above display panel is lighter, and there will be no completely light-blocking region, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0142] In some examples, such as Figure 11aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the right, and the photo-alignment direction of the photo-alignment region in the third domain region is to the left. The second alignment layer 202 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 11b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 11c shown. As Figure 11c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 11a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0143] In some examples, as Figure 12a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the left, and the photo-alignment direction of the photo-alignment region in the third domain region is to the right. The second alignment layer 202 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the left, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 12b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 12c shown. As Figure 12c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 12a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0144] In some examples, as Figure 13aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the left, and the photo-alignment direction of the photo-aligned region in the third domain region is to the right. The second alignment layer 202 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the right, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 13b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 13c shown. As Figure 13c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 13a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0145] In some examples, as Figure 14a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the second domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the right, and the photo-alignment direction of the photo-aligned region in the second domain region is to the left. The second alignment layer 202 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the third domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 14b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 14c shown. As Figure 14c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 14a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0146] In some examples, as Figure 15aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the second domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the right, and the photo-alignment direction of the photo-alignment region in the second domain region is to the left. The second alignment layer 202 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the third domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 15b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 15c shown. As Figure 15c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 15a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0147] In some examples, as Figure 16a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the second domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the left, and the photo-alignment direction of the photo-alignment region in the second domain region is to the right. The second alignment layer 202 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the third domain region is to the left, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 16b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 16c shown. As Figure 16c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 16a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0148] In some examples, as Figure 17aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the second domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the left, and the photo-alignment direction of the photo-aligned region in the second domain region is to the right. The second alignment layer 202 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the third domain region is to the right, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 17b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 17c shown. As Figure 17c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 17a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0149] In some examples, as Figure 18a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the right, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the left. The second alignment layer 202 in the second domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the left, and the photo-alignment direction of the photo-aligned region in the third domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 18b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 18c shown. As Figure 18c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 18a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0150] In some examples, as Figure 19aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the right, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the left. The second alignment layer 202 in the second domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the right, and the photo-alignment direction of the photo-aligned region in the third domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 19b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 19c shown. As Figure 19c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 19a in the display panel shown, the shadow in each sub-pixel is lighter, and there is no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0151] In some examples, as Figure 20a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the second domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the left, and the photo-alignment direction of the photo-aligned region in the third domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 20b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 20c shown. As Figure 20c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 20a in the display panel shown, the shadow in each sub-pixel is lighter, and there is no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0152] In some examples, as Figure 21aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the first domain region and the fourth domain region in each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the second domain region and the third domain region in each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the right, and the photo-alignment direction of the photo-aligned region in the third domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 21b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 21c shown. As Figure 21c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 21a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0153] In some examples, as Figure 22a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the third domain region in each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the second domain region is to the right, and the photo-alignment direction of the photo-aligned region in the third domain region is to the left. The second alignment layer 202 in the first domain region and the fourth domain region in each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 22b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 22c shown. As Figure 22c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 22a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0154] In some examples, as Figure 23aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the right, and the photo-alignment direction of the photo-alignment region in the third domain region is to the left. The second alignment layer 202 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 23b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 23c shown. As Figure 23c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 23a in the display panel shown, the shadow in each sub-pixel is lighter, and there is no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0155] In some examples, as Figure 24a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the left, and the photo-alignment direction of the photo-alignment region in the third domain region is to the right. The second alignment layer 202 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the left, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 24b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 24c shown. As Figure 24c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 24a in the display panel shown, the shadow in each sub-pixel is lighter, and there is no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0156] In some examples, as Figure 25aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the left, and the photo-alignment direction of the photo-alignment region in the third domain region is to the right. The second alignment layer 202 in the first domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and termination state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 25b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 25c shown. As Figure 25c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 25a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0157] In some examples, as Figure 26a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the second domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. The second alignment layer 202 in the first domain region and the third domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the right, and the photo-alignment direction of the photo-alignment region in the third domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and termination state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 26b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 26c shown. As Figure 25c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 26a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0158] In some examples, as Figure 27aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-aligned directions of the two photo-aligned regions are different. The photo-aligned direction of the photo-aligned region in the second domain region is to the left, and the photo-aligned direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the first domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-aligned directions of the two photo-aligned regions are different. The photo-aligned direction of the photo-aligned region in the first domain region is to the right, and the photo-aligned direction of the photo-aligned region in the third domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 27b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 27c shown. As Figure 27c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 27a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0159] In some examples, as Figure 28a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the second domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-aligned directions of the two photo-aligned regions are different. The photo-aligned direction of the photo-aligned region in the second domain region is to the left, and the photo-aligned direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the first domain region and the third domain region of each sub-pixel 01 is a photo-aligned region, and the photo-aligned directions of the two photo-aligned regions are different. The photo-aligned direction of the photo-aligned region in the first domain region is to the right, and the photo-aligned direction of the photo-aligned region in the third domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 28b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 28c shown. As Figure 28c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 28a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0160] In some examples, as Figure 29aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the third domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. The second alignment layer 202 in the first domain region and the second domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the left, and the photo-alignment direction of the photo-alignment region in the second domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and termination state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 29b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 29c shown. As Figure 29c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 29a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0161] In some examples, as Figure 30a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the third domain region is to the right, and the photo-alignment direction of the photo-alignment region in the fourth domain region is to the left. The second alignment layer 202 in the first domain region and the second domain region of each sub-pixel 01 is a photo-alignment region, and the photo-alignment directions of the two photo-alignment regions are different. The photo-alignment direction of the photo-alignment region in the first domain region is to the left, and the photo-alignment direction of the photo-alignment region in the second domain region is to the right. After cell formation, the initial state T1, intermediate state T2, and termination state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 30b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 30c shown. As Figure 30c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 30a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0162] In some examples, as Figure 31aAs shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the third domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the first domain region and the second domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the right, and the photo-alignment direction of the photo-aligned region in the second domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 31c shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 31c shown. As Figure 31c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 31a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0163] In some examples, as Figure 32a shown, each sub-pixel 01 of the display panel has 4 domain regions, namely the first domain region, the second domain region, the third domain region, and the fourth domain region. The first alignment layer 102 in the third domain region and the fourth domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the third domain region is to the left, and the photo-alignment direction of the photo-aligned region in the fourth domain region is to the right. The second alignment layer 202 in the first domain region and the second domain region of each sub-pixel 01 is a photo-aligned region, and the photo-alignment directions of the two photo-aligned regions are different. The photo-alignment direction of the photo-aligned region in the first domain region is to the right, and the photo-alignment direction of the photo-aligned region in the second domain region is to the left. After cell formation, the initial state T1, intermediate state T2, and final state T3 of the chiral liquid crystal molecules in each domain region of the liquid crystal cell are as Figure 32b shown. When the above display panel emits light, the distribution of "dark lines" in each sub-pixel 01 is as Figure 32c shown. As Figure 32c shown, compared with the display panel using nematic liquid crystal molecule materials, Figure 32a in the display panel shown, the shadow in each sub-pixel is lighter, and there will be no completely light-blocking area, which significantly improves the light transmittance of the display panel and effectively improves the display effect of the display panel.

[0164] Second aspect, embodiments of the present disclosure provide a manufacturing method of a display panel, which is used to prepare any of the above display panels. The method includes: forming a first substrate 1 and a second substrate 2; injecting liquid crystal molecules between the first substrate 1 and the second substrate 2 to form a liquid crystal layer 4. The above method further includes forming a plurality of sub-pixels 01, wherein each sub-pixel 01 is divided into 2n domain regions arranged side by side along a first direction, n≥1 and n is an integer; in the sub-pixel 01, the initial arrangements of the liquid crystal molecules in different domain regions are different; the liquid crystal molecules are chiral liquid crystal molecules.

[0165] Since the initial arrangements of the liquid crystal molecules in different domain regions of each sub-pixel 01 of the display panel are different, this display panel has a multi-domain display function, improving the viewing angle, and there will be no color deviation problem when the human eye views the display surface at different azimuth angles and viewing angles. The above preparation method uses chiral liquid crystal molecules to replace the nematic liquid crystal molecules commonly used in the prior art. Due to the structural characteristics of the chiral liquid crystal molecules arranged in a spiral shape in the vertical direction, the long axis orientations of the chiral liquid crystal molecules in the same region will not be exactly the same. Therefore, compared with nematic liquid crystal molecules, there will be no completely light-blocking regions in each sub-pixel 01. It is actually observed that when chiral liquid crystal molecules are used as the liquid crystal material, the "dark lines" in each sub-pixel 01 region are lighter. Therefore, the display panel prepared by the above preparation method has a higher light transmittance and improves the display effect.

[0166] In some examples, the process of forming the first substrate 1 includes forming a first alignment layer on the first substrate substrate 101; the process of forming the second substrate 2 includes forming a second alignment layer on the second substrate substrate 201. Figure 33 is a flowchart of a preparation method of a display panel according to an embodiment of the present disclosure; as Figure 33 shown, taking the preparation of a display panel with 2 domain directions (i.e., n = 1) as an example, the preparation method of this display panel specifically includes the following steps.

[0167] S101: Form a first substrate 1 and a second substrate 2.

[0168] In some examples, the step of forming the first substrate 1 in step S101 may include: forming a first alignment layer on the first substrate substrate 101; the step of forming the second substrate 2 may include: forming a second alignment layer on the second substrate substrate 201. Both the first alignment layer and the second alignment layer contain light-seeking molecules. Under the irradiation of linearly polarized ultraviolet light, these light-seeking molecules will undergo photoreaction, photodegradation, or photo-isomerization and other reactions in the direction parallel to the polarized light, thereby generating surface anisotropy, and further enabling the liquid crystal molecules in contact with the alignment layer surface to form anisotropic arrangements.

[0169] S102: Expose the first alignment layer.

[0170] In some examples, step S102 may specifically include: separately exposing the first alignment layers in the two domain regions of each sub-pixel 01, with different exposure directions each time, so that the photo-alignment directions of the first alignment layers in the two domain regions are different, that is, causing the light-seeking molecules on the first alignment layers in the two domain regions to have anisotropies of different properties.

[0171] S103: Form a liquid crystal layer 4.

[0172] In some examples, step S103 may specifically include: disposing the first substrate 1 and the second substrate 2 opposite to each other, and injecting chiral liquid crystal molecules between the first substrate 1 and the second substrate 2 to form a liquid crystal layer 4. Since the light-seeking molecules on the first alignment layers in the two domain regions of each sub-pixel 01 have anisotropies of different properties, it can cause the chiral liquid crystal molecules in contact with the surface of the alignment layer to form an anisotropic arrangement. Therefore, in the two domain regions of each sub-pixel 01, the initial orientations of the chiral liquid crystal molecules are different.

[0173] The display panel prepared by the above method can achieve an increase in the viewing angles in two directions, and there will be no color deviation problem when viewed at different azimuth angles and viewing angles. In addition, since the above display panel uses chiral liquid crystal molecules as the liquid crystal material, the light transmittance of the display panel is effectively improved, and the display effect of the display panel is improved.

[0174] In some examples, when n = 2, a display panel with two domain directions can be prepared by exposing the second alignment layer. The display panel prepared by this method can also solve the color deviation problem when viewed at different azimuth angles and viewing angles, and improve the light transmittance of the display panel and the display effect of the display panel.

[0175] In some examples, the process of forming the first substrate 1 includes forming a first alignment layer on the first substrate substrate 101; the process of forming the second substrate 2 includes forming a second alignment layer on the second substrate substrate 201. When n ≥ 2, the step of forming 2n domain regions of the sub-pixel 01 includes: separately exposing the first alignment layers in the n domain regions of the sub-pixel 01 so that the photo-alignment directions of the first alignment layers in the n domain regions are different; separately exposing the second alignment layers in the n domain regions of the sub-pixel 01 so that the photo-alignment directions of the first alignment layers in the two domain regions are different; the projection of the exposure region of the first alignment layer on the second alignment layer 202 does not coincide with the exposure region of the second alignment layer 202.

[0176] Taking n = 2 as an example, Figure 34 is a flowchart of another method for preparing a display panel according to an embodiment of the present disclosure; as Figure 34 shown, the method for preparing a display panel with four domain directions specifically includes the following steps:

[0177] S201: Form the first substrate 1 and the second substrate 2.

[0178] In some examples, step S201 may specifically include: forming a first alignment layer on the first substrate substrate 101, and the two constitute the first substrate 1; forming a second alignment layer on the second substrate substrate 201, and the two constitute the second substrate 2. The side of the first alignment layer facing away from the first substrate substrate 101 and the side of the second alignment layer facing away from the second substrate substrate 201 both contain light-seeking molecules. Under the irradiation of linearly polarized ultraviolet light, these light-seeking molecules will undergo reactions such as photoaddition, photodegradation, or photoisomerization in the direction parallel to the polarized light, thereby generating surface anisotropy, and further enabling the liquid crystal molecules in contact with the surface of the alignment layer to form anisotropic arrangements.

[0179] S202: Expose the first alignment layer.

[0180] In some examples, step S202 may specifically include: separately exposing the first alignment layer in two domain regions of each sub-pixel 01. Each time of exposure, the exposure direction is different, so that the photo-alignment directions of the first alignment layer in the two domain regions are different, that is, the light-seeking molecules on the first alignment layer in the two domain regions generate anisotropies of different properties.

[0181] S203: Expose the second alignment layer.

[0182] In some examples, step S203 may specifically include: separately exposing the second alignment layer in two other domain regions of each sub-pixel 01. Each time of exposure, the exposure direction is different, so that the photo-alignment directions of the first alignment layer in the two domain regions are different, that is, the light-seeking molecules on the first alignment layer in the two domain regions generate anisotropies of different properties. It should be noted that the projection of the exposed area on the first alignment layer on the second alignment layer 202 does not coincide with the exposed area on the second alignment layer 202.

[0183] S204: Form the liquid crystal layer 4.

[0184] In some examples, step S204 may specifically include: relatively disposing the first substrate 1 and the second substrate 2, and pouring chiral liquid crystal molecules between the first substrate 1 and the second substrate 2 to form the liquid crystal layer 4. Since the two regions on the first alignment layer 102 and the second alignment layer 202 in each sub-pixel 01 are separately exposed previously, each sub-pixel 01 includes four domain regions, and the chiral liquid crystal molecules in each domain region face different directions.

[0185] With the above preparation method, the display panel obtained can increase the viewing angles in four directions, that is, there will be no color deviation problem when the human eye views the display panel from the four directions of up, down, left, and right. In addition, since the above display panel uses chiral liquid crystal molecules as the liquid crystal material, the light transmittance of the display panel is effectively improved, and the display effect of the display panel is improved.

[0186] In a third aspect, an embodiment of the present disclosure provides a display device, which includes any one of the above display panels. Therefore, the display device of this embodiment has a large viewing angle and a high light transmittance. The display device may be: an electronic paper, a QLED panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function.

[0187] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A display panel, which includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer includes liquid crystal molecules; characterized in that, The display panel includes a plurality of sub-pixels; each of the sub-pixels is divided into 2n domain regions arranged side by side in a first direction, where n = 2; in the sub-pixel, the initial arrangements of the liquid crystal molecules in different domain regions are different; the liquid crystal molecules are chiral liquid crystal molecules; the first substrate and the second substrate are disposed opposite to each other to form a liquid crystal cell; the cell thickness of the liquid crystal cell is 1 / 4 of the pitch of the chiral liquid crystal molecules. The first substrate includes a first substrate and a first alignment layer located on the side of the first substrate close to the liquid crystal layer; the second substrate includes a second substrate and a second alignment layer located on the side of the second substrate close to the liquid crystal layer. The illumination direction of the first alignment layer of the domain region is from left to right or from right to left when being exposed; the illumination direction of the second alignment layer of the domain region is from right to left or from left to right when being exposed. The first alignment layer and the second alignment layer in each sub-pixel each include 2n sub-regions arranged side by side in a first direction, and one sub-region is correspondingly arranged with one domain region; the 2n sub-regions of the first alignment layer and the second alignment layer in the sub-pixel each include n photo-alignment regions, and the photo-alignment directions of the photo-alignment regions are different; the projections of the n photo-alignment regions of the first alignment layer in the sub-pixel on the second alignment layer do not coincide with the n photo-alignment regions of the second alignment layer in the sub-pixel. In the sub-pixel, the two photo-alignment regions of the first alignment layer are spaced apart, and the photo-alignment directions of the first alignment layer in the two photo-alignment regions are opposite; the two photo-alignment regions of the second alignment layer are spaced apart, and the photo-alignment directions of the second alignment layer in the two photo-alignment regions are opposite. The four domain regions in the sub-pixel are respectively a first domain region, a second domain region, a third domain region, and a fourth domain region; the photo-alignment direction of the first alignment layer in the first domain region is opposite to the photo-alignment direction of the second alignment layer in the second domain region; the photo-alignment direction of the first alignment layer in the third domain region is opposite to the photo-alignment direction of the second alignment layer in the fourth domain region; the photo-alignment direction of the first alignment layer in the third domain region is the same as the photo-alignment direction of the second alignment layer in the second domain region; or, The photo-alignment direction of the second alignment layer in the first domain region is opposite to the photo-alignment direction of the first alignment layer in the second domain region; the photo-alignment direction of the second alignment layer in the third domain region is opposite to the photo-alignment direction of the first alignment layer in the fourth domain region; the photo-alignment direction of the first alignment layer in the second domain region is the same as the photo-alignment direction of the second alignment layer in the third domain region.

2. The display panel according to claim 1, characterized in that, The cell thickness of the liquid crystal cell is 2.8 - 3.6 μm, and the pitch of the chiral liquid crystal molecules is 11.2 - 14.4 μm.

3. A method for manufacturing a display panel, which is used to manufacture the display panel according to claim 1 or 2; the method includes: A first substrate and a second substrate are formed, and liquid crystal molecules are infused between the first substrate and the second substrate to form a liquid crystal layer. It is characterized in that the method further includes forming a plurality of sub-pixels. Among them, each sub-pixel is divided into 2n domain regions arranged side by side in a first direction, where n = 2. In the sub-pixel, the initial arrangements of the liquid crystal molecules in different domain regions are different. The liquid crystal molecules are chiral liquid crystal molecules. Forming the first substrate includes forming a first alignment layer on the first substrate substrate. Forming the second substrate includes forming a second alignment layer on the second substrate substrate. The illumination direction of the first alignment layer of the domain region is from left to right or from right to left when exposed. The illumination direction of the second alignment layer of the domain region is from right to left or from left to right when exposed.

4. The preparation method according to claim 3, wherein When n = 2, the steps of forming the 2n domain regions of the sub-pixel include: Exposing the first alignment layers in n domain regions of the sub-pixel respectively, so that the photo-alignment directions of the first alignment layers in the n domain regions are different. Exposing the second alignment layers in n domain regions of the sub-pixel respectively, so that the photo-alignment directions of the second alignment layers in the 2 domain regions are different. The projection of the exposed area of the first alignment layer on the second alignment layer does not coincide with the exposed area of the second alignment layer.

5. A display device, characterized in that, A display panel according to claim 1 or 2.

Images