Array substrate, display panel, preparation method thereof and display device

Abstract

The application discloses an array substrate, a display panel and a preparation method thereof, and a display device, which are used for reducing the length of dark lines and improving the transmittance of a sub-pixel. The array substrate provided by the embodiment of the application comprises a first substrate, and a plurality of sub-pixels arranged in an array along a first direction and a second direction on one side of the first substrate; the first direction intersects the second direction; the sub-pixel comprises an electrode part, and the electrode part comprises a plurality of slits; the extension direction of the slit intersects the first direction and the second direction; the electrode part is divided into two slit regions arranged along the second direction; the slit region is divided into two sub-regions arranged along the positive direction of the first direction along the diagonal line of the slit region; the included angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 0 and less than 90; and the included angle between the extension direction of the slit in the other of the two sub-regions and the positive direction of the first direction is greater than 90 and less than 180.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an array substrate, a display panel, a method for fabricating the same, and a display device. Background Technology

[0002] Currently, for liquid crystal display panels, photoalignment is typically used to align the alignment film. A liquid crystal display panel consists of multiple sub-pixels, each containing multiple domain regions. The arrangement of liquid crystal molecules between adjacent domain regions and at the edges of some domain regions prevents light from passing through, resulting in dark lines between adjacent domain regions and at the edges of some domain regions. When these dark lines are long, they severely affect the transmittance of the liquid crystal display panel. Summary of the Invention

[0003] This application provides an array substrate, a display panel, a method for manufacturing the same, and a display device, which reduce the length of dark lines and improve the transmittance of sub-pixels.

[0004] An array substrate is provided in this application embodiment. The array substrate includes: a first substrate, and a plurality of sub-pixels arranged in an array along a first direction and a second direction on one side of the first substrate; the first direction and the second direction intersect.

[0005] The sub-pixel includes an electrode portion, which includes a plurality of slits; the extension direction of the slits intersects both the first direction and the second direction.

[0006] The electrode portion consists of two slit regions arranged along a second direction; each slit region is divided along its diagonal into two sub-regions arranged along a first direction, with the angle between the extension direction of the slit in one of the sub-regions and the positive direction of the first direction being greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 .

[0007] In some embodiments, the slits in two adjacent slit regions extend in symmetrical directions.

[0008] In some embodiments, the two slit regions are a first slit region and a second slit region that are symmetrical.

[0009] In some embodiments, the first slit region includes a first sub-region and a second sub-region of equal area arranged in a positive direction along a first direction, and the second slit region includes a third sub-region and a fourth sub-region of equal area arranged in a positive direction along a first direction.

[0010] The first subregion is symmetrical to the third subregion, and the second subregion is symmetrical to the fourth subregion.

[0011] In some embodiments, the sub-region is triangular in shape.

[0012] In some embodiments, the angle between the extension direction of the slit in the first sub-region and the positive direction of the first direction, and the angle between the extension direction of the slit in the fourth sub-region and the positive direction of the first direction, are greater than 90°. And less than 180 The angle between the extension direction of the slit in the second sub-region and the positive direction of the first direction, and the angle between the extension direction of the slit in the third sub-region and the positive direction of the first direction are both greater than 0. And less than 90 .

[0013] In some embodiments, the electrode portion further includes a plurality of first strip electrodes, with the slit located between two adjacent first strip electrodes;

[0014] The first sub-region includes a plurality of first strip electrodes which are integrally connected with the third sub-region, or the second sub-region includes a plurality of first strip electrodes which are integrally connected with the fourth sub-region.

[0015] In some embodiments, the electrode portion further includes: a plurality of first strip electrodes and a second strip electrode;

[0016] The slit is located between two adjacent first strip electrodes, and the second strip electrode extends along the first direction and is located between the first slit region and the second slit region;

[0017] The second strip electrode is connected to the first strip electrode included in the first sub-region and the third sub-region, or the second strip electrode is connected to the first strip electrode included in the second sub-region and the fourth sub-region.

[0018] In some embodiments, the electrode portion further includes: a frame strip electrode that surrounds a plurality of slits and is connected to a plurality of first strip electrodes.

[0019] In some embodiments, at least a portion of the sub-pixels include an electrode portion that is a first electrode portion;

[0020] In the first electrode portion, the angle between the diagonal of the two sub-regions included in the first slit region and the positive first direction is greater than 0. And less than 90 .

[0021] In some embodiments, at least some sub-pixels include electrode portions that are second electrode portions;

[0022] In the second electrode section, the angle between the diagonal line between the two sub-regions included in the first slit region and the positive first direction is greater than 90 degrees. And less than 180 .

[0023] In some embodiments, the plurality of sub-pixels includes a plurality of rows of sub-pixels extending along a first direction and arranged along a second direction;

[0024] In odd-numbered subpixel rows, the electrode portions of multiple subpixels are all first electrode portions, and in even-numbered subpixel rows, the electrode portions of multiple subpixels are all second electrode portions; or, in even-numbered subpixel rows, the electrode portions of multiple subpixels are all first electrode portions, and in odd-numbered subpixel rows, the electrode portions of multiple subpixels are all second electrode portions.

[0025] In some embodiments, the acute angle between the extension direction of the slit and the first direction is greater than 0 and less than or equal to 30°. .

[0026] In some embodiments, the sub-pixel further includes: a thin-film transistor located on one side of the first substrate and electrically connected to an electrode portion, wherein the electrode portion is located on the side of the thin-film transistor opposite to the first substrate.

[0027] This application provides a display panel comprising: an array substrate provided in this application, a counter substrate disposed opposite to the array substrate, a liquid crystal layer located between the array substrate and the counter substrate, a first alignment film disposed on the side of the array substrate facing the counter substrate, a second alignment film disposed on the side of the counter substrate facing the array substrate, and a common electrode located between the second alignment film and the counter substrate.

[0028] In some embodiments, at least one of the first alignment film and the second alignment film is an alignment film for which an alignment process is performed.

[0029] This application provides a method for manufacturing a display panel, comprising:

[0030] The present application provides an array substrate and a counter substrate as described in its embodiments;

[0031] A first alignment film is formed on the side of the array substrate facing the opposing substrate, and a second alignment film is formed on the side of the opposing substrate facing the array substrate; at least one of the first alignment film and the second alignment film is photo-aligned according to a plurality of preset alignment directions, the preset alignment directions correspond one-to-one with the sub-regions included in the slit region, the preset alignment directions corresponding to different sub-regions in the slit region are different, and the preset alignment direction corresponding to the sub-region is parallel to the extension direction of the slit in that sub-region.

[0032] A cell assembly process is performed on the array substrate and the opposing substrate, and liquid crystal is filled between the first substrate and the opposing substrate to form a liquid crystal layer.

[0033] In some embodiments, the electrode portion includes a first sub-region, a second sub-region, a third sub-region, and a fourth sub-region; the plurality of preset alignment directions include: a first preset alignment direction, a second preset alignment direction, a third preset alignment direction, and a fourth preset alignment direction;

[0034] The first preset alignment direction and the second preset alignment direction are parallel to the extension direction of the slits in the first sub-region and the third sub-region, and the first preset alignment direction is opposite to the second preset alignment direction.

[0035] The third preset alignment direction and the fourth preset alignment direction are parallel to the extension direction of the slits in the second sub-region and the fourth sub-region, and the third preset alignment direction is opposite to the fourth preset alignment direction.

[0036] This application provides a display device, which includes a display panel provided in this application embodiment.

[0037] The array substrate, display panel, and their fabrication method and display device provided in this application embodiment are characterized by dividing a plurality of slits in the electrode portion into two slit regions arranged along a second direction. Each slit region is further divided into two sub-regions arranged along a first direction along its diagonal. The angle between the extension direction of the slit in one of the sub-regions and the positive direction of the first direction is greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 In this way, when the array substrate is applied to liquid crystal display products, the area corresponding to the sub-pixel only forms dark lines between the two slit areas and at the diagonal of the sub-area division in each slit area. Compared with related technologies, the length of the dark lines can be reduced, the aperture ratio of the sub-pixel can be increased, and thus the light transmittance of the display product can be improved. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a domain region and dark lines provided for related technologies;

[0040] Figure 2 Another schematic diagram of domain regions and dark lines provided for related technologies;

[0041] Figure 3This is a schematic diagram of the structure of an array substrate provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of another array substrate provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of dark lines corresponding to an array substrate provided in an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0045] Figure 7 This is a schematic diagram of the dark lines corresponding to another array substrate provided in an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0047] Figure 9 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0048] Figure 10 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0049] Figure 11 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0050] Figure 12 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0051] Figure 13 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0052] Figure 14 This is a schematic diagram of another array substrate provided in the embodiments of this application;

[0053] Figure 15 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0054] Figure 16 A schematic diagram of the electric field of a display panel provided in an embodiment of this application;

[0055] Figure 17 A schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0056] Figure 18 A schematic diagram of the preset alignment direction provided in the embodiments of this application;

[0057] Figure 19 This is a schematic diagram of the alignment force of the second alignment film provided in an embodiment of this application. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0059] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0060] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this application. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0061] In related technologies, such as Figure 1 , Figure 2 As shown, each sub-pixel of the display panel includes four domain regions arranged sequentially along the second direction Y, namely A1, A2, A3, and A4. Figure 1 As shown, between A1 and A2, on the right edge of A1, on the left edge of A2, between A3 and A4, on the right edge of A4, and on the left edge of A3, the azimuth angle of the liquid crystal molecule 801 is 0° with the second direction Y. Between A2 and A3, the azimuth angle of the liquid crystal molecule 801 is 0° with the first direction X. Light cannot pass through these locations, thus forming the dark line B1. Figure 2As shown, between A1 and A2, on the right edge of A2, on the left edge of A1, between A3 and A4, on the right edge of A3, and on the left edge of A4, the azimuth angle of liquid crystal molecule 801 with the second direction Y is 0°. Between A2 and A3, the azimuth angle of liquid crystal molecule 801 with the first direction X is 0°. Light cannot pass through these locations, thus forming the B2 dark line. The width of the sub-pixel in the second direction Y is 'a', and the width of the sub-pixel in the first direction X is 'a / 3'. Therefore, the lengths of both the B1 and B2 dark lines are 2a. The dark lines occupy a large proportion of the sub-pixel, affecting the transmittance of the sub-pixel and consequently the transmittance of the entire display panel.

[0062] This application provides an array substrate, such as... Figure 3 , Figure 4 , Figure 6 As shown, the array substrate includes: a first substrate 1, and a plurality of sub-pixels 2 arranged in an array along a first direction X and a second direction Y on one side of the first substrate 1; the first direction X and the second direction Y intersect.

[0063] Sub-pixel 2 includes: an electrode portion 201, the electrode portion 201 including a plurality of slits 2011; the extending direction of the slits 2011 intersects both the first direction X and the second direction Y;

[0064] The electrode section 201 is divided into two slit regions 3 arranged along the second direction Y; the slit regions 3 are further divided into two sub-regions 301 arranged along the positive direction of the first direction X along their diagonals; the angle between the extension direction of the slit 2011 of one of the sub-regions 301 and the positive direction X+ of the first direction X is greater than 0. And less than 90 The angle between the extension direction of the slit 2011 of the other sub-region 301 and the positive X+ of the first direction X is greater than 90 degrees. And less than 180 .

[0065] It should be noted that the array substrate provided in this application embodiment is applied to liquid crystal display products. Liquid crystal display products typically include: an array substrate and a counter substrate disposed opposite each other, a liquid crystal layer located between the array substrate and the counter substrate, and an alignment layer also needs to be provided between the array substrate and the liquid crystal layer, and between the counter substrate and the liquid crystal layer. A lower polarizer needs to be provided on the light-incident side of the array substrate, and an upper polarizer needs to be provided on the light-emitting side of the counter substrate. The transmission axis of one of the lower polarizer and the upper polarizer is parallel to the first direction X, and the transmission axis of the other is parallel to the second direction Y. When a voltage is applied to the electrode portion, under the action of the electric field force of the electrode portion and the alignment force of the alignment film of the display panel, the liquid crystal molecules deflect. In the sub-pixel, the liquid crystal molecules in regions with different slit extension directions have different orientations after deflection, forming different domain regions; that is, different sub-regions of the sub-pixel correspond to different domain regions. The array substrate provided in this application embodiment is as follows... Figure 4 , Figure 6 The region corresponding to the electrode section 201 shown has four sub-regions that correspond to four domain regions. Figure 4 , Figure 6 The orientations of the corresponding liquid crystal molecules 801 are as follows: Figure 5 , Figure 7 As shown, in the region between sub-regions, the liquid crystal molecules are parallel to the first direction X or the second direction Y, therefore light cannot pass through this region, forming dark lines C1, C2, and C3. Outside the boundary between adjacent sub-regions, the liquid crystal molecules at the edge of the sub-regions are not parallel to the first direction X or the second direction Y, therefore no dark lines appear. That is, when the array substrate provided in this embodiment is applied to a liquid crystal display product, the dark line areas of the sub-pixels are only C1, C2, and C3. If the array substrate provided in this embodiment is as described... Figure 4 The region consisting of the two slit areas corresponding to the electrode section shown is related to the technology as follows: Figure 2 , Figure 3 The region consisting of four domain regions shown has the same width in the first direction X and the same length in the second direction Y. The region consisting of two slit regions and the region consisting of four domain regions has a length of h1 in the second direction Y, and the region consisting of two slit regions and the region consisting of four domain regions has a width of h1 / 3 in the first direction X. Therefore, as shown... Figure 2 The total length of the dark line B1 shown and as follows Figure 3 The total length of the dark lines shown in B2 is 2h1, as follows: Figure 5 The total length of the dark lines C1, C2, and C3 shown is + = <2h1, and the length of the B1 and B2 dark lines is reduced compared to related technologies. .

[0066] The array substrate provided in this application embodiment divides the plurality of slits in the electrode portion into two slit regions arranged along a second direction. Each slit region is further divided into two sub-regions arranged along a first direction along its diagonal. The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 In this way, when the array substrate is applied to liquid crystal display products, the area corresponding to the sub-pixel only forms dark lines between the two slit areas and at the diagonal of the sub-area division in each slit area. Compared with related technologies, the length of the dark lines can be reduced, the aperture ratio of the sub-pixel can be increased, and thus the light transmittance of the display product can be improved.

[0067] It should be noted that, Figure 4 , Figure 6 Taking the example of the first direction X being perpendicular to the second direction Y, the direction of the first direction X extending to the right is the positive direction X+, and the direction of the first direction X extending to the left is the negative direction X-. The direction of the second direction Y extending upward is the positive direction Y+, and the direction of the second direction Y extending downward is the negative direction Y-. The angle between the extension direction of slit 2011 and the positive direction X+ of the first direction is greater than 0. And less than 90 This refers to the situation where, when the extension direction of the slit passes through the origin of the coordinate system formed by the first direction X and the second direction Y, the angle between the portion located in the positive direction Y+ of the second direction Y and the positive direction X+ of the first direction X is greater than 0. And less than 90 That is, the extension direction of slit 2011 extends along the first and third quadrants of the coordinate system formed by the first direction X and the second direction Y. The angle between the extension direction of slit 2011 and the positive X+ of the first direction X is greater than 90°. And less than 180 This refers to the situation where, when the extension direction of the slit passes through the origin of the coordinate system formed by the first direction X and the second direction Y, the angle between the portion located in the positive direction Y+ of the second direction Y and the positive direction X+ of the first direction X is greater than 90 degrees. And less than 180 That is, the extension direction of slit 2011 extends along the second and fourth quadrants of the coordinate system formed by the first direction X and the second direction Y.

[0068] In some embodiments, such as Figure 4 , Figure 6As shown, the electrode section 201 also includes a plurality of first strip electrodes 2012, and the slit 2011 is located between two adjacent first strip electrodes 2012.

[0069] It should be noted that in each sub-region, the extension direction of the first strip electrode is the same as the extension direction of the slit.

[0070] In specific implementation, the slits have a first width perpendicular to their extension direction, and the first strip electrode has a second width perpendicular to its extension direction. Within the same sub-region, the first width of each slit is the same, and the second width of each first strip electrode is the same. The first width of the slits located in different sub-regions is the same, and the second width of the first strip electrodes located in different sub-regions is the same.

[0071] In some embodiments, such as Figure 4 , Figure 6 As shown, the extension directions of slits 2011 in two adjacent slit regions 3 are symmetrical. Specifically, the extension direction of slit 2011 in a sub-region 301 of one slit region 3 is symmetrical to the extension direction of slit 2011 in a sub-region 301 of the other slit region 3, and the extension direction of slit 2011 in another sub-region 301 of one slit region 3 is symmetrical to the extension direction of slit 2011 in another sub-region 301 of the other slit region 3.

[0072] In some embodiments, such as Figure 4 , Figure 6 As shown, the two slit regions 3 are symmetrical, namely the first slit region 3-1 and the second slit region 3-2.

[0073] In some embodiments, such as Figure 4 , Figure 6 As shown, the slit region 2 is rectangular in shape, and the sub-region 301 is triangular in shape. Since each slit region 3 is divided into two sub-regions 301 arranged along the first direction X along its diagonal, the two sub-regions 301 included in the slit region 2 have equal areas.

[0074] In some embodiments, such as Figure 4 , Figure 6 As shown, the first slit region 3-1 includes a first sub-region 301-1 and a second sub-region 301-2 with equal areas and arranged in the positive direction along the first direction X. The second slit region 3-2 includes a third sub-region 301-3 and a fourth sub-region 301-4 with equal areas and arranged in the positive direction along the first direction X.

[0075] The first subregion 301-1 is symmetrical to the third subregion 301-3, and the second subregion 301-2 is symmetrical to the fourth subregion 301-4.

[0076] It should be noted that the symmetry of the two sub-regions not only means that the areas of the two sub-regions are equal and symmetrical, but also that the patterns of the electrode parts in the two sub-regions are symmetrical, that is, the patterns of the first strip electrode and the slit included in the two sub-regions are symmetrical.

[0077] The array substrate provided in this application embodiment has an equal area for all sub-regions of each electrode portion due to the symmetry of the first slit region and the second slit region. The sub-regions of the first slit region and the second slit region are also symmetrical. When the array substrate is applied to a liquid crystal display panel, the domain areas of liquid crystal deflection corresponding to different sub-regions of the sub-pixel are equal, which helps to ensure the display uniformity of different sub-regions of the sub-pixel, thereby ensuring the display uniformity of the display product.

[0078] In some embodiments, such as Figure 4 , Figure 6 As shown, the angle α1 between the extension direction of the slit 2011 in the first sub-region 301-1 and the positive X+ of the first direction X, and the angle α4 between the extension direction of the slit 2011 in the fourth sub-region 301-4 and the positive X+ of the first direction X are both greater than 90°. And less than 180 The angle α2 between the extension direction of slit 2011 in the second sub-region 301-2 and the positive X+ of the first direction X, and the angle α3 between the extension direction of slit 2011 in the third sub-region 301-3 and the positive X+ of the first direction X are both greater than 0. And less than 90 .

[0079] That is, the slits in the first sub-region and the fourth sub-region extend along the first and third quadrants of the coordinate system formed by the first direction X and the second direction Y. The slits in the second sub-region and the third sub-region extend along the second and fourth quadrants of the coordinate system formed by the first direction X and the second direction Y.

[0080] In specific implementation, such as Figure 4 , Figure 6 As shown, a plurality of first strip electrodes 2012 in the first sub-region 301-1 are integrally connected with a first strip electrode 2012 in the second sub-region 301-2.

[0081] In specific implementation, such as Figure 4 , Figure 6 As shown, a portion of the first strip electrode 2012 in the first slit region 3-1 is integrally connected with a portion of the first strip electrode 2012 in the second slit region 3-2.

[0082] In some embodiments, such as Figure 4As shown, the plurality of first strip electrodes 2012 included in the second sub-region 301-2 are integrally connected with the plurality of first strip electrodes 2012 included in the fourth sub-region 301-4; or, as... Figure 6 As shown, the plurality of first strip electrodes 2012 included in the first sub-region 301-1 are integrally connected with the plurality of first strip electrodes 2012 included in the third sub-region 301-3.

[0083] Alternatively, in some embodiments, such as Figures 8-11 As shown, the electrode section 201 further includes a second strip electrode 2013; the second strip electrode 2013 extends along the first direction X and is located between the first slit region 3-1 and the second slit region 3-2.

[0084] It should be noted that, as Figure 8 , Figure 10 The dark lines of the sub-pixels shown are... Figure 5 Same, such as Figure 9 , Figure 11 The dark lines of the sub-pixels shown are... Figure 6 same.

[0085] In some embodiments, such as Figure 8 , Figure 10 As shown, the second strip electrode 2013 is connected to the first strip electrode 2012 included in the second sub-region 301-2 and the fourth sub-region 301-4.

[0086] Alternatively, in some embodiments, such as Figure 9 , Figure 11 As shown, the second strip electrode 2013 is connected to the first strip electrode 2012 included in the first sub-region 301-1 and the third sub-region 301-3.

[0087] In some embodiments, such as Figure 4 , Figure 6 , Figure 8 , Figure 9 As shown, the electrode section 201 further includes a frame strip electrode 2014 that surrounds a plurality of slits 2011 and is connected to a plurality of first strip electrodes 2012.

[0088] In specific implementation, such as Figure 4 , Figure 6 , Figure 8 , Figure 9 As shown, the border strip electrode 2014 surrounds a plurality of slits 2011. The area surrounded by the border strip electrode 2014 is rectangular in shape. That is, the border strip electrode 2014 includes two portions extending along a first direction X and two portions extending along a second direction Y.

[0089] In a specific implementation, the two portions of the frame strip electrode extending along the first direction X have a fourth width in the second direction Y, and the two portions of the frame strip electrode extending along the second direction Y have a fifth width in the first direction X, with the fourth width being equal to the fifth width.

[0090] In some embodiments, at least a portion of the sub-pixels include an electrode portion that is a first electrode portion;

[0091] In the first electrode section, such as Figure 4 , Figure 8 , Figure 10 As shown, the angle between the diagonal of the two sub-regions 301 included in the first slit region 3-1 and the first direction X positive X+ is greater than 0. And less than 90 Correspondingly, the angle between the diagonal of the two sub-regions 301 included in the second slit region 3-2 and the positive X-direction X+ of the first direction is greater than 90 degrees. And less than 180 .

[0092] That is, the diagonal between the two sub-regions included in the first slit region extends along the first and third quadrants of the coordinate system formed by the first direction X and the second direction Y. The diagonal between the two sub-regions included in the second slit region extends along the second and fourth quadrants of the coordinate system formed by the first direction X and the second direction Y.

[0093] In some embodiments, at least some sub-pixels include electrode portions that are second electrode portions;

[0094] In the second electrode section, such as Figure 6 , Figure 9 , Figure 11 As shown, the angle between the diagonal of the two sub-regions 301 included in the first slit region 3-1 and the positive X-direction is greater than 90 degrees. And less than 180 Correspondingly, the angle between the diagonal of the two sub-regions 301 included in the second slit region 3-2 and the first direction X positive X+ is greater than 0. And less than 90 .

[0095] That is, the diagonal between the two sub-regions included in the first slit region extends along the second and fourth quadrants of the coordinate system formed by the first direction X and the second direction Y. The diagonal between the two sub-regions included in the second slit region extends along the first and third quadrants of the coordinate system formed by the first direction X and the second direction Y.

[0096] In some embodiments, such as Figure 12 , Figure 13 , Figure 14As shown, the plurality of sub-pixels 2 include a plurality of sub-pixel rows 4 extending along the first direction X and arranged along the second direction Y;

[0097] In the odd-numbered sub-pixel rows 4, the electrode portions 201 of multiple sub-pixels 2 are all first electrode portions 201-1, and in the even-numbered sub-pixel rows 4, the electrode portions 201 of multiple sub-pixels 2 are all second electrode portions 201-2; or, in the even-numbered sub-pixel rows 4, the electrode portions 201 of multiple sub-pixels 2 are all first electrode portions 201-1, and in the odd-numbered sub-pixel rows 4, the electrode portions 201 of multiple sub-pixels 2 are all second electrode portions 201-2.

[0098] It should be noted that, Figure 12 , Figure 13 , Figure 14 In the above, if the 4th sub-pixel row of the i-th row is an odd-numbered sub-pixel row, then the 4th sub-pixel row of the (i+1)-th row is an even-numbered sub-pixel row; if the 4th sub-pixel row of the i-th row is an even-numbered sub-pixel row, then the 4th sub-pixel row of the (i+1)-th row is an odd-numbered sub-pixel row.

[0099] It should be noted that, due to the asymmetry of the dark line areas of the subpixels in the first direction, when the electrode portions included in the array substrate are all first electrode portions or second electrode portions, there may be differences in viewing angle brightness on the left and right sides of the viewing angle (the line connecting the centers of both eyes and the center of the display area of ​​the display product is perpendicular to the display surface), which may lead to color shift. For example, when the electrode portions included in the array substrate are all first electrode portions, the viewing angle brightness on the left side is higher than that on the right side; when the electrode portions included in the array substrate are all second electrode portions, the viewing angle brightness on the right side is higher than that on the left side.

[0100] The array substrate provided in this application has an electrode pattern in odd-numbered sub-pixel rows that differs from that in even-numbered sub-pixel rows. This improves the brightness uniformity of different side viewing angles, thereby alleviating the color shift problem at different side viewing angles.

[0101] In a specific implementation, if the electrode portion of the odd-numbered sub-pixel rows includes a second strip electrode, then the electrode portion of the even-numbered sub-pixel rows also includes a second strip electrode; if the electrode portion of the odd-numbered sub-pixel rows includes a border strip electrode, then the electrode portion of the even-numbered sub-pixel rows also includes a border strip electrode.

[0102] In a specific implementation, the first width of the slit in the electrode portion of the odd-numbered sub-pixel rows is equal to the first width of the slit in the electrode portion of the even-numbered sub-pixel rows, and the second width of the first strip electrode in the electrode portion of the odd-numbered sub-pixel rows is equal to the second width of the first strip electrode in the electrode portion of the even-numbered sub-pixel rows.

[0103] In some embodiments, the acute angle between the extension direction of the slit and the first direction X is greater than 0 and less than or equal to 30°. .

[0104] In some embodiments, such as Figure 3 As shown, the sub-pixel 2 further includes a thin-film transistor (TFT) located on one side of the first substrate 1 and electrically connected to the electrode portion 201, wherein the electrode portion 201 is located on the side of the thin-film transistor TFT facing away from the first substrate 1. That is, the electrode portion 201 is a pixel electrode.

[0105] In a specific implementation, the electrode portion is a transparent electrode portion, and the material of the electrode portion is, for example, indium tin oxide.

[0106] In some embodiments, such as Figure 3 As shown, the thin-film transistor (TFT) includes an active layer 11, a gate G, a source S, and a drain D. The gate G is located on the side of the active layer 11 facing away from the first substrate 1. The array substrate further includes a buffer layer 12 located between the first substrate 1 and the active layer 11, a gate insulating layer 13 located between the active layer 11 and the gate G, an interlayer insulating layer 14 located between the gate G and the source S and drain D, and a first insulating layer 15 located between the source S and drain D and the electrode portion 201. It should be noted that this embodiment illustrates a top-gate structure, i.e., the gate is located on the side of the active layer away from the first substrate. Of course, it can also be a bottom-gate structure, i.e., the gate is located between the active layer and the first substrate, and the location is not limited here.

[0107] Based on the same inventive concept, embodiments of this application also provide a display panel, such as... Figure 15 As shown, the display panel includes: an array substrate 5 provided in this application embodiment, a counter substrate 6 disposed opposite to the array substrate 5, a liquid crystal layer 8 located between the array substrate 5 and the counter substrate 6, a first alignment film 7 disposed on the side of the array substrate 5 facing the counter substrate 6, a second alignment film 9 disposed on the side of the counter substrate 6 facing the array substrate 5, and a common electrode 10 located between the second alignment film 9 and the counter substrate 6.

[0108] The display panel provided in this application embodiment includes the array substrate provided in this application embodiment. Each sub-pixel in the array substrate includes multiple slits in its electrode portion, which are divided into two slit regions arranged along a second direction. Each slit region is further divided into two sub-regions arranged along a first direction along its diagonal. The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 Applying a voltage to the common electrode and the electrode section causes the liquid crystal molecules in the liquid crystal layer to deflect. In the region corresponding to each sub-pixel, dark lines are formed only between the two slit regions and at the diagonal line dividing the sub-region within each slit region. Compared with related technologies, this can reduce the length of the dark lines, increase the aperture ratio of the sub-pixel, and thus improve the light transmittance of the display panel.

[0109] In some embodiments, at least one of the first alignment film and the second alignment film is an alignment film for which an alignment process is performed.

[0110] In practical implementation, a voltage is applied to the common electrode and the electrode portion. Under the action of the electric field force between the common electrode and the electrode portion and the alignment force of the alignment film, the azimuth angle rotation is completed, forming multiple domain regions. For example, the first alignment film does not undergo an alignment process, while only the second alignment film undergoes an alignment process. A schematic diagram of the electric field force between the common electrode 10 and the electrode portion 201 when the voltage is applied to the common electrode and the electrode portion is shown below. Figure 16 As shown. Under the action of the electric field force between the common electrode and the electrode portion and the alignment force of the second alignment film, a perpendicular orientation force is formed, which drives the liquid crystal molecules to rotate. For example, after the liquid crystal molecule 801 rotates, as shown... Figure 15 As shown.

[0111] In some embodiments, the opposing substrate includes: a second substrate, a black matrix and a color resist located on the side of the substrate facing the second alignment film. The black matrix has an opening region, and the color resist is located at least within the opening region. A color filter corresponds one-to-one with a sub-pixel. The plurality of sub-pixels includes red sub-pixels, blue sub-pixels, and green sub-pixels, and the corresponding color resists include red color resist, blue color resist, and green color resist. For example, the black matrix and the color filter are located between a common electrode and the second substrate.

[0112] Based on the same inventive concept, embodiments of this application also provide a method for manufacturing a display panel, such as... Figure 17 As shown, it includes:

[0113] S101. Provide the array substrate and the opposing substrate provided in the embodiments of this application;

[0114] S102. A first alignment film is formed on the side of the array substrate facing the opposing substrate, and a second alignment film is formed on the side of the opposing substrate facing the array substrate. At least one of the first alignment film and the second alignment film is photo-aligned according to a plurality of preset alignment directions. The preset alignment directions correspond one-to-one with the sub-regions included in the slit region. The preset alignment directions corresponding to different sub-regions in the slit region are different. The preset alignment direction corresponding to the sub-region is parallel to the extension direction of the slit in that sub-region.

[0115] S103, Perform a cell alignment process on the array substrate and the opposing substrate, and fill the space between the first substrate and the opposing substrate with liquid crystal to form a liquid crystal layer.

[0116] The display panel fabrication method provided in this application embodiment uses the array substrate described above. Each sub-pixel in the array substrate includes multiple slits in its electrode portion, which are divided into two slit regions arranged along a second direction. Each slit region is further divided into two sub-regions arranged along a first direction along its diagonal. The angle between the extension direction of the slit in one of the sub-regions and the positive direction of the first direction is greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 The preset alignment direction corresponds one-to-one with the sub-regions included in the slit region. Different sub-regions within the slit region have different preset alignment directions, and the preset alignment direction corresponding to a sub-region is parallel to the extension direction of the slit in that sub-region. Thus, by applying a voltage to the array substrate and the opposing substrate of the fabricated display panel, under the action of the electric field force between the array substrate and the opposing substrate and the alignment force of the alignment film, the liquid crystal molecules deflect to form domains corresponding to the sub-regions. The region corresponding to the sub-pixel forms dark lines only between the two slit regions and at the diagonal line dividing the sub-regions within each slit region. Compared to related technologies, this reduces the length of the dark lines, increases the aperture ratio of the sub-pixels, and thus improves the light transmittance of the display panel.

[0117] In some embodiments, the electrode portion includes a first sub-region, a second sub-region, a third sub-region, and a fourth sub-region; the plurality of preset alignment directions include: a first preset alignment direction, a second preset alignment direction, a third preset alignment direction, and a fourth preset alignment direction;

[0118] The first preset alignment direction and the second preset alignment direction are parallel to the extension direction of the slits in the first sub-region and the third sub-region, and the first preset alignment direction is opposite to the second preset alignment direction.

[0119] The third preset alignment direction and the fourth preset alignment direction are parallel to the extension direction of the slits in the second sub-region and the fourth sub-region, and the third preset alignment direction is opposite to the fourth preset alignment direction.

[0120] For example, the first preset alignment direction F1, the second preset alignment direction F2, the third preset alignment direction F3, and the fourth preset alignment direction F4 are as follows: Figure 18 As shown. In specific implementation, the region E1 corresponding to the first slit region corresponds to the first preset alignment direction F1 and the third preset alignment direction F3, and the region E2 corresponding to the second slit region corresponds to the second preset alignment direction F2 and the fourth preset alignment direction F4.

[0121] In practice, there are no requirements regarding the order of the first preset alignment direction F1, the second preset alignment direction F2, the third preset alignment direction F3, and the fourth preset alignment direction F4.

[0122] In some embodiments, only one of the first alignment film and the second alignment film is photoaligned according to a plurality of preset alignment directions.

[0123] The display panel manufacturing method provided in this application only performs photo-alignment on one of the first alignment film and the second alignment film, which can save production capacity compared to a scheme that performs photo-alignment on both the first alignment film and the second alignment film.

[0124] It should be noted that for key characteristics of display panels such as optical transmittance, contrast ratio, and color shift, there is no significant difference between photoaligning only one of the first and second alignment films and photoaligning both of them. Furthermore, in the alignment film without exposure processing, the pretilt angle of the liquid crystal molecules is close to 90°, which can improve the problem of light leakage in dark states at large viewing angles compared to photoaligning both the first and second alignment films.

[0125] In practice, a photoalignment mask with a transparent pattern and an exposure process are used for photoalignment. The preset alignment direction is the scanning direction of the light in the exposure process.

[0126] In some embodiments, only the second alignment film is photoaligned. For example... Figure 18 The alignment directions shown correspond to the alignment forces in the first slit region and the second slit region, as follows: Figure 19 As shown. The pretilt angle of the liquid crystal molecules near the first alignment film is close to 90°. A voltage is applied to the common electrode and the electrode portion. Under the action of the electric field force between the common electrode and the electrode portion and the alignment force of the second alignment film, a perpendicular orientation force is formed, driving the liquid crystal molecules to rotate. After rotation, the liquid crystal molecules 801... Figure 15 As shown.

[0127] This application provides a display device, which includes a display panel provided in this application embodiment.

[0128] In some embodiments, the display device further includes a backlight module. The display panel is located on the light-emitting side of the backlight module.

[0129] The display device provided in this application embodiment includes any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, and navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this application. Implementation of this display device can refer to the above-described display panel embodiment; repeated details will not be elaborated upon.

[0130] In summary, the array substrate, display panel, fabrication method, and display device provided in this application have multiple slits in the electrode portion divided into two slit regions arranged along a second direction. Each slit region is further divided into two sub-regions arranged along a first direction along its diagonal. The angle between the extension direction of the slit in one of the sub-regions and the positive direction of the first direction is greater than 0°. And less than 90 The angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 In this way, when the array substrate is applied to liquid crystal display products, the area corresponding to the sub-pixel only forms dark lines between the two slit areas and at the diagonal of the sub-area division in each slit area. Compared with related technologies, the length of the dark lines can be reduced, the aperture ratio of the sub-pixel can be increased, and thus the light transmittance of the display product can be improved.

[0131] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0132] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An array substrate, characterized in that, The array substrate includes: a first substrate, and a plurality of sub-pixels arranged in an array along a first direction and a second direction on one side of the first substrate; the first direction and the second direction intersect. The sub-pixel includes an electrode portion, the electrode portion including a plurality of slits; the extension direction of the slits intersects both the first direction and the second direction; The electrode portion comprises two slit regions arranged along the second direction; each slit region is divided along its diagonal into two sub-regions arranged in the positive direction along the first direction, wherein the angle between the extension direction of the slit in one of the two sub-regions and the positive direction of the first direction is greater than 0. And less than 90 The angle between the extension direction of the slit in the other sub-region of the two sub-regions and the positive direction of the first direction is greater than 90 degrees. And less than 180 ; Wherein, the extension directions of the slits in two adjacent slit regions are symmetrical; the two slit regions are a symmetrical first slit region and a second slit region; The electrode section further includes a plurality of first strip electrodes, the slit is located between two adjacent first strip electrodes, and a portion of the first strip electrodes in the first slit area is integrally connected to a portion of the first strip electrodes in the second slit area.

2. The array substrate according to claim 1, characterized in that, The first slit region includes a first sub-region and a second sub-region of equal area arranged in a positive direction along the first direction, and the second slit region includes a third sub-region and a fourth sub-region of equal area arranged in a positive direction along the first direction. The first sub-region is symmetrical to the third sub-region, and the second sub-region is symmetrical to the fourth sub-region.

3. The array substrate according to claim 2, characterized in that, The sub-region is triangular in shape.

4. The array substrate according to claim 3, characterized in that, The angle between the extension direction of the slit in the first sub-region and the positive direction of the first direction, and the angle between the extension direction of the slit in the fourth sub-region and the positive direction of the first direction, are both greater than 90°. And less than 180 The angle between the extension direction of the slit in the second sub-region and the positive direction of the first direction, and the angle between the extension direction of the slit in the third sub-region and the positive direction of the first direction, are greater than 0. And less than 90 .

5. The array substrate according to claim 4, characterized in that, The plurality of first strip electrodes included in the first sub-region are integrally connected with the plurality of first strip electrodes included in the third sub-region, or the plurality of first strip electrodes included in the second sub-region are integrally connected with the plurality of first strip electrodes included in the fourth sub-region.

6. The array substrate according to claim 5, characterized in that, The electrode section further includes: a frame strip electrode that surrounds the plurality of slits and is connected to the plurality of first strip electrodes.

7. The array substrate according to claim 4, characterized in that, At least a portion of the sub-pixels include electrode portions that are first electrode portions; In the first electrode portion, the angle between the diagonal of the two sub-regions included in the first slit region and the positive first direction is greater than 0. And less than 90 .

8. The array substrate according to claim 4 or 7, characterized in that, At least a portion of the sub-pixels include electrode portions that are second electrode portions; In the second electrode portion, the angle between the diagonal line between the two sub-regions included in the first slit region and the positive first direction is greater than 90 degrees. And less than 180 .

9. The array substrate according to claim 8, characterized in that, The plurality of sub-pixels includes a plurality of sub-pixel rows that extend along the first direction and are arranged along the second direction; In the odd-numbered rows of sub-pixels, the electrode portions of multiple sub-pixels are all first electrode portions, and in the even-numbered rows of sub-pixels, the electrode portions of multiple sub-pixels are all second electrode portions; or, in the even-numbered rows of sub-pixels, the electrode portions of multiple sub-pixels are all first electrode portions, and in the odd-numbered rows of sub-pixels, the electrode portions of multiple sub-pixels are all second electrode portions.

10. The array substrate according to any one of claims 1 to 5, 7, characterized in that, The acute angle between the extension direction of the slit and the first direction is greater than 0 and less than or equal to 30°. .

11. The array substrate according to any one of claims 1 to 5, 7, characterized in that, The sub-pixel further includes a thin-film transistor located on one side of the first substrate and electrically connected to the electrode portion, wherein the electrode portion is located on the side of the thin-film transistor opposite to the first substrate.

12. A display panel, characterized in that, The display panel includes: an array substrate according to any one of claims 1 to 11, a counter substrate disposed opposite to the array substrate, a liquid crystal layer located between the array substrate and the counter substrate, a first alignment film disposed on the side of the array substrate facing the counter substrate, a second alignment film disposed on the side of the counter substrate facing the array substrate, and a common electrode located between the second alignment film and the counter substrate.

13. The display panel according to claim 12, characterized in that, At least one of the first alignment film and the second alignment film is an alignment film for which an alignment process is performed.

14. A method for manufacturing a display panel, characterized in that, The method includes: Provide an array substrate and an opposing substrate according to any one of claims 1 to 11; A first alignment film is formed on the side of the array substrate facing the opposing substrate, and a second alignment film is formed on the side of the opposing substrate facing the array substrate; at least one of the first alignment film and the second alignment film is photo-aligned according to a plurality of preset alignment directions, the preset alignment directions corresponding one-to-one with the sub-regions included in the slit region, the preset alignment directions corresponding to different sub-regions in the slit region are different, and the preset alignment direction corresponding to the sub-region is parallel to the extension direction of the slit in the sub-region; A cell assembly process is performed on the array substrate and the opposing substrate, and liquid crystal is filled between the array substrate and the opposing substrate to form a liquid crystal layer.

15. A display device, characterized in that, The display device includes the display panel according to claim 12 or 13.

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