Array substrate and display panel

Abstract

The application provides an array substrate and a display panel; the array substrate is characterized in that the width of at least part of the branch electrode is gradually reduced in the direction from the connection between the branch electrode and the stem electrode to the connection between the branch electrode and the stem electrode, so that there is at least one region with different electric field intensity in the array substrate, so that the deflection angle of liquid crystal in the at least one region is different, so that the 8-domain viewing angle effect can be realized on the basis of the 4-domain design, the display effect of wide viewing angle at low gray scale and high penetration at high gray scale is realized, and the wide viewing angle and the high aperture ratio are considered.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an array substrate and a display panel. Background Art

[0002] Liquid crystal display devices include twisted nematic (TN) or super twisted nematic (STN) type, in-plane switching (IPS) type and vertical alignment (VA) type. Among them, VA type liquid crystal displays are widely used due to their extremely high contrast compared to other types of liquid crystal displays. In order to improve the display viewing angle, existing VA type liquid crystal display devices adopt an 8-domain design. By dividing the sub-pixels into a main area and a sub-area, a shared electrode or a common wiring is used to divide the voltage of the sub-area to achieve a wide viewing angle display. However, this design will result in a low aperture ratio. When the liquid crystal display displays a high grayscale, the sub-area is insufficiently charged, resulting in low penetration. In the 4-domain design, although the aperture ratio and penetration rate are higher, since the 4-domain design is controlled by only one transistor, there is no need to achieve the effect of partition opening, and the viewing angle is smaller.

[0003] Therefore, existing VA-type liquid crystal display devices have the technical problem of being unable to achieve both wide viewing angle and high aperture ratio. Summary of the Invention

[0004] The embodiments of the present application provide an array substrate and a display panel to solve the technical problem that existing VA-type liquid crystal display devices cannot achieve both wide viewing angle and high aperture ratio.

[0005] An embodiment of the present application provides an array substrate, which includes:

[0006] substrate;

[0007] a gate layer, disposed on one side of the substrate;

[0008] a source-drain electrode layer, disposed on a side of the gate layer away from the substrate;

[0009] a pixel electrode layer, disposed on a side of the source / drain electrode layer away from the gate layer, the pixel electrode layer comprising pixel electrodes, the pixel electrodes comprising a trunk electrode, branch electrodes, and slits, the trunk electrodes comprising a first trunk electrode disposed along a first direction and a second trunk electrode disposed along a second direction;

[0010] Wherein, in a direction from close to a connection point between the branch electrode and the main electrode to far away from the connection point between the branch electrode and the main electrode, the width of at least a portion of the branch electrode decreases gradually.

[0011] In some embodiments, the pixel electrode comprises a first sub-region, a second sub-region, a third sub-region and a fourth sub-region divided by the first stem electrode and the second stem electrode, the branch electrode in the first sub-region extends along a third direction, the branch electrode in the second sub-region extends along a fourth direction, the branch electrode in the third sub-region extends along a fifth direction, and the branch electrode in the fourth sub-region extends along a sixth direction, the third direction, the fourth direction, the fifth direction and the sixth direction are different from the included angle of the first direction.

[0012] In the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, at least part of the branch electrode decreases in width along a direction from close to the connection between the branch electrode and the first stem electrode to far away from the connection between the branch electrode and the first stem electrode in the extension direction of the branch electrode.

[0013] At least part of the branch electrode decreases in width along a direction from close to the connection between the branch electrode and the second stem electrode to far away from the connection between the branch electrode and the second stem electrode.

[0014] In some embodiments, in at least one of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, the width of the branch electrode decreases in the extension direction of the branch electrode.

[0015] In some embodiments, at least part of the branch electrode increases in width along a direction from close to the connection between the branch electrode and the stem electrode to far away from the connection between the branch electrode and the stem electrode.

[0016] In some embodiments, the pixel electrode further comprises a connection electrode disposed on both sides of the first stem electrode, in at least one of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, the branch electrode comprises a first part and a second part disposed in sequence in the extension direction of the branch electrode, the first part and the second part are connected, the second part is connected with the connection electrode, the width of the first part decreases along a direction close to the second part, and the width of the second part decreases along a direction close to the first part.

[0017] In some embodiments, in at least one of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, the branch electrode comprises a plurality of branch parts, and in each branch part, the width of the branch part decreases in sequence in the extension direction of the branch electrode.

[0018] In some embodiments, in at least one of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, the branch electrode comprises a plurality of portions, the width of each of at least two portions is equal, and the width of each portion is unequal.

[0019] In some embodiments, the sum of the width of the portion of the branch electrode close to the second stem electrode and the width of the slit corresponding to the portion of the branch electrode close to the second stem electrode is equal to the sum of the width of the portion of the branch electrode away from the second stem electrode and the width of the slit corresponding to the portion of the branch electrode away from the second stem electrode.

[0020] In some embodiments, the gate layer comprises a scan line, a gate, a first electrode, a second electrode and a third electrode, the pixel electrode layer further comprises a fourth electrode, the scan line is arranged along the second direction, the gate is connected with the scan line, the first electrode is arranged corresponding to the source-drain electrode layer, the second electrode is arranged corresponding to the first stem electrode, and the third electrode is arranged corresponding to the fourth electrode.

[0021] Meanwhile, the embodiment of the present application provides a display panel, which comprises the array substrate as described in any one of the above embodiments.

[0022] Beneficial effects: the present application provides an array substrate and a display panel; the array substrate gradually decreases the width of at least one portion of the branch electrode in the direction from the connection between the branch electrode and the stem electrode to the connection between the branch electrode and the stem electrode, so that there is at least one region in the array substrate where the electric field intensity is different at each position, so that the deflection angle of the liquid crystal at each position in the at least one region is different, thereby realizing the 8-domain viewing angle effect on the basis of the 4-domain design, realizing the display effect of wide viewing angle at low gray scale and high penetration at high gray scale, and balancing wide viewing angle and high aperture ratio. BRIEF DESCRIPTION OF DRAWINGS

[0023] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0024] Figure 1 The schematic diagram of a comparative display device is provided for the embodiments of the present application.

[0025] Figure 2 The schematic diagram of an array substrate is provided for the embodiments of the present application.

[0026] Figure 3 The first kind of stack diagram of each film layer of the array substrate is provided for the embodiments of the present application.

[0027] Figure 4 The Figure 3Schematic cross-sectional view of the array substrate in FIG.

[0028] Figure 5 This is a second stacking diagram of the various film layers of the array substrate provided in an embodiment of the present application.

[0029] Figure 6 This is a third stacking diagram of the various film layers of the array substrate provided in an embodiment of the present application.

[0030] Figure 7 for Figure 3 An exploded view of the various film layers of the array substrate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] In the present application, unless specifically defined and limited otherwise, "on" or "under" of a first feature with respect to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "over", "above", and "on" of a first feature with respect to a second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Under", "below", and "underneath" of a first feature with respect to a second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0035] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application can repeatedly refer to reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0036] As Figure 1 shown, Figure 1 (a) in FIG. 1 is a cross-sectional view of a pixel structure of a comparative display device, Figure 1 (b) in FIG. 1 is a cross-sectional view of a pixel structure of a comparative display device, Figure 1 (a) in FIG. 1, Figure 1 (c) in FIG. 1 is a cross-sectional view of a pixel structure of a comparative display device, Figure 1 (a) in FIG. 1. In order to explain the principle of the technical problem solved by the present application, a comparative display device is provided, which cannot be used as a prior art display device in the art. As Figure 1 shown, the comparative display device includes a gate electrode film 11, a source / drain electrode film 12, and a pixel electrode film 13 including a stem 131, branches 132, and gaps 133. In the comparative display device, the length H1 of each branch 132 in the longitudinal direction is equal, and the length H2 of each gap 133 between the branches 132 in the longitudinal direction is equal, as Figure 1 (b) in FIG. 1, and Figure 1As can be seen in (c), the vertical length of branches 132 at different locations is H1, and the vertical length of gaps 133 at different locations is H2. Since only one transistor is provided in a sub-pixel, the liquid crystal deflection angles in each region of the sub-pixel are the same, making it impossible to achieve zone control, resulting in a smaller viewing angle. While an 8-domain design can achieve zone control, it requires multiple transistors and multiple traces to achieve zone control, resulting in a lower aperture ratio. Therefore, existing VA-type liquid crystal display devices have the technical problem of being unable to achieve both a wide viewing angle and a high aperture ratio.

[0037] In order to solve the above-mentioned technical problems, the embodiments of the present application provide an array substrate and a display panel to solve the above-mentioned problems.

[0038] Figure 2 A schematic diagram of an array substrate provided in an embodiment of the present application. Figure 3 This is a first stacking diagram of the various film layers of the array substrate provided in an embodiment of the present application. Figure 4 for Figure 3 A cross-sectional schematic diagram of the array substrate in FIG. Figure 4 (a) in Figure 3 B1-B2 cross-sectional diagram of the array substrate in FIG. Figure 4 (b) in Figure 3 Schematic diagram of the B3-B4 cross section of the array substrate. Figure 5 This is a second stacking diagram of the various film layers of the array substrate provided in an embodiment of the present application. Figure 6 This is a third stacking diagram of the various film layers of the array substrate provided in an embodiment of the present application. Figure 7 for Figure 3 An exploded view of each film layer of the array substrate; Figure 7 (a) is an exploded view of the gate layer of the array substrate; Figure 7 (b) is an exploded view of the source and drain layers of the array substrate; Figure 7 (c) is an exploded view of the pixel electrode layer of the array substrate.

[0039] like Figure 2 to Figure 4 As shown, an embodiment of the present application provides an array substrate, the array substrate 2 including a substrate 21, a gate layer 22, a source-drain layer 25, and a pixel electrode layer 27. The gate layer 22 is disposed on one side of the substrate 21, the source-drain layer 25 is disposed on a side of the gate layer 22 away from the substrate 21, and the pixel electrode layer 27 is disposed on a side of the source-drain layer 25 away from the gate layer 22. The pixel electrode layer 27 includes a pixel electrode 270, the pixel electrode 270 including a trunk electrode 271, branch electrodes 272, and a slit 273. The trunk electrode 271 includes a first trunk electrode 271a disposed along a first direction X and a second trunk electrode 271b disposed along a second direction Y.

[0040] wherein, in the first direction X, a width of a portion of the branch electrode 272 is greater than a width of another portion of the branch electrode 272, and a width of a slit 273 corresponding to the portion of the branch electrode 272 is less than a width of a slit corresponding to the other portion of the branch electrode 272 (e.g. Figure 3 wherein, in the first direction X, a width of a portion of the branch electrode 272 is greater than a width of another portion of the branch electrode 272, and a width of a slit 273 corresponding to the portion of the branch electrode 272 is less than a width of a slit corresponding to the other portion of the branch electrode 272 (e.g.

[0041] The array substrate provided by the embodiments of the present application has at least two regions with different electric field strengths in the array substrate by making the width of a portion of the branch electrode greater than the width of another portion of the branch electrode and the width of a slit corresponding to the portion of the branch electrode less than the width of a slit corresponding to the other portion of the branch electrode in the first direction, so that the liquid crystal in the at least two regions with different electric field strengths has different deflection angles, and thus the 8-domain viewing angle effect can be realized on the basis of the 4-domain design, the display effect of wide viewing angle at low gray scale and high penetration at high gray scale is realized, and wide viewing angle and high aperture ratio are taken into account.

[0042] In some embodiments, as shown in FIGS. 1A and 1B, the width of the branch electrode 272 decreases from the position close to the connection between the branch electrode 272 and the trunk electrode 271 to the position far from the connection between the branch electrode 272 and the trunk electrode 271. Figure 3 、 Figure 5 、 Figure 6 The array substrate provided by the embodiments of the present application has at least two regions with different electric field strengths in the array substrate by making the width of a portion of the branch electrode greater than the width of another portion of the branch electrode and the width of a slit corresponding to the portion of the branch electrode less than the width of a slit corresponding to the other portion of the branch electrode in the first direction, so that the liquid crystal in the at least two regions with different electric field strengths has different deflection angles, and thus the 8-domain viewing angle effect can be realized on the basis of the 4-domain design, the display effect of wide viewing angle at low gray scale and high penetration at high gray scale is realized, and wide viewing angle and high aperture ratio are taken into account.

[0043] Specifically, it can be understood that the slit is a gap between two adjacent branch electrodes or a branch electrode and a main electrode. Except that the branch electrode in the edge area can have a slit on only one side, the branch electrodes in other areas have slits on both sides. Then, when the branch electrode is a branch electrode in the edge area, the slit corresponding to a part of the branch electrode can refer to the slit on one side of the part of the branch electrode. When the branch electrode is a branch electrode in the middle area, the slit corresponding to a part of the branch electrode can refer to the slit on both sides of the part of the branch electrode. It can be understood that the widths of the slits on both sides of the part of the branch electrode can be equal; and the slit corresponding to a part of the branch electrode refers to the gap between a part of the branch electrode and other branch electrodes. For example, the slits corresponding to a part of the branch electrode with a width of L6 are the slits on both sides thereof, and the width of the slits corresponding to a part of the branch electrode with a width of L6 is L8, the slits corresponding to another part of the branch electrode with a width of L5 are the slits on both sides thereof, and the width of the slits corresponding to another part of the branch electrode with a width of L5 is L7; that is, when the width of a part of the branch electrode is smaller, the width of the corresponding slit is larger, thereby avoiding increasing the space occupied by a single pixel and improving the pixel density.

[0044] Specifically, such as Figure 1 、 Figure 4 As shown, it can be seen that in the embodiment of the present application, the length L3 of a portion of the branch electrode 272 in the second direction Y is greater than the length L1 of the other portion of the branch electrode 272 in the second direction Y. Correspondingly, the spacing L4 between a portion of adjacent branch electrodes 272 is less than the spacing L2 between the other portions of adjacent branch electrodes 272, so that the electric field strength in the area where the portion of the branch electrode with a length of L3 is located is greater than the electric field strength in the area where the portion of the branch electrode with a length of L1 is located. Then, during display, the liquid crystal deflection angle in the area where the portion of the branch electrode with a length of L3 is located is different from the liquid crystal deflection angle in the area where the portion of the branch electrode with a length of L1 is located, thereby achieving different liquid crystal deflection angles in different areas of the sub-pixel unit, thereby improving the viewing angle, and due to the use of a four-domain structure, the aperture ratio can be improved.

[0045] Specifically, it can be understood that, on the basis of not changing the occupied area of ​​the pixel electrode, increasing the width of the branch electrode will inevitably reduce the width of the slit, so that the sum of the two remains unchanged, the total width of the pixel electrode remains unchanged, and when the widths of the branch electrodes on a straight line in the second direction are equal, as shown in FIG. Figure 4 (a) and Figure 4 As shown in (b), the sum of the length L3 of a portion of the branch electrode 272 in the second direction Y and the spacing L4 between a portion of an adjacent branch electrode 272 is equal to the sum of the length L1 of another portion of the branch electrode 272 in the second direction Y and the spacing L2 between another portion of the adjacent branch electrode 272.

[0046] In some embodiments, the array substrate includes a plurality of sub-pixel units, and the sub-pixel unit includes four domains.

[0047] In some embodiments, as Figure 3 As shown, in the first direction X, the width of the portion of the branch electrode 272 close to the second trunk electrode 271b is greater than the width of the portion of the branch electrode 272 far from the second trunk electrode 271b, and the width of the slit 273 corresponding to the portion of the branch electrode 272 close to the second trunk electrode 271b is smaller than the width of the slit 273 corresponding to the portion of the branch electrode 272 far from the second trunk electrode 271b; for example, the width L6 of the portion of the branch electrode 272 close to the second trunk electrode 271b is greater than the width L5 of the portion of the branch electrode far from the second trunk electrode 271b, and the width L8 of the slit corresponding to the portion of the branch electrode 272 close to the second trunk electrode 271b is smaller than the width L7 of the slit corresponding to the portion of the branch electrode 272 far from the second trunk electrode 271b. By making the width of the portion of the branch electrode close to the second main electrode greater than the width of the portion of the branch electrode away from the second main electrode, and the width of the slit corresponding to the portion of the branch electrode close to the second main electrode less than the width of the slit corresponding to the portion of the branch electrode away from the second main electrode, the electric field strength close to the second main electrode in the array substrate can be made greater than the electric field strength away from the second main electrode, thereby making the liquid crystal deflection angle different, achieving a wide viewing angle effect, and the area close to the second main electrode can be turned on first.

[0048] Specifically, the above embodiment is described as an example in which the width of the portion of the branch electrode close to the second main electrode is greater than the width of the portion of the branch electrode far from the second main electrode, and the width of the slit corresponding to the portion of the branch electrode close to the second main electrode is smaller than the width of the slit corresponding to the portion of the branch electrode far from the second main electrode, but the embodiments of the present application are not limited to this. The width of the portion of the branch electrode close to the second main electrode can be smaller than the width of the portion of the branch electrode far from the second main electrode, and the width of the slit corresponding to the portion of the branch electrode close to the second main electrode is greater than the width of the slit corresponding to the portion of the branch electrode far from the second main electrode.

[0049] In some embodiments, as Figure 3As shown, the sum of the width of the portion of the branch electrode 272 close to the second trunk electrode 271b and the width of the slit 273 corresponding to the portion of the branch electrode 272 close to the second trunk electrode 271b is equal to the sum of the width of the portion of the branch electrode 272 away from the second trunk electrode 271b and the width of the slit 273 corresponding to the portion of the branch electrode 272 close to the second trunk electrode 271b. For example, the sum L6+L8 of the width L6 of the portion of the branch electrode 272 close to the second trunk electrode 271b and the width L8 of the slit 273 corresponding to the portion of the branch electrode 272 close to the second trunk electrode 271b is equal to the sum L5+L7 of the width L5 of the portion of the branch electrode 272 away from the second trunk electrode 271b and the width L7 of the slit 273 corresponding to the portion of the branch electrode 272 away from the second trunk electrode 271b. By making the sum of the width of the portion of the branch electrode close to the second main electrode and the width of the slit corresponding to the portion of the branch electrode close to the second main electrode equal to the sum of the width of the portion of the branch electrode far from the second main electrode and the width of the slit corresponding to the portion of the branch electrode far from the second main electrode, it is possible to reduce the width of the slits between the branch electrodes when the width of the branch electrode is increased, and increase the width of the slits between the branch electrodes when the width of the branch electrode is reduced, thereby keeping the occupied space of the pixel electrode unchanged and avoiding affecting the aperture ratio. In addition, the electric field strength in different areas can be different, thereby achieving different liquid crystal deflection angles in different areas and improving the viewing angle.

[0050] In some embodiments, as Figure 3 As shown, the pixel electrode 270 includes a first sub-region 311, a second sub-region 312, a third sub-region 313, and a fourth sub-region 314 formed by dividing the first trunk electrode 271a and the second trunk electrode 271b. The branch electrode 272 located in the first sub-region 311 extends along a third direction Z1, the branch electrode 272 located in the second sub-region 312 extends along a fourth direction Z2, the branch electrode 272 located in the third sub-region 313 extends along a fifth direction Z3, and the branch electrode 272 located in the fourth sub-region 314 extends along a sixth direction Z4. The third direction Z1, the fourth direction Z2, the fifth direction Z3, and the sixth direction Z4 have different angles with the first direction X (from Figure 3As can be seen in the figure, the angle between the third direction Z1 and the first direction X is an acute angle, the angle between the fourth direction Z2 and the first direction X is an obtuse angle, the angle between the fifth direction Z3 and the first direction X is greater than 180 degrees and less than 270 degrees, and the angle between the sixth direction Z4 and the first direction X is greater than 270 degrees and less than 360 degrees). In the first sub-area 311, the second sub-area 312, the third sub-area 313, and the fourth sub-area 314, in the extension direction of the branch electrode 272 (the extension direction of the branch electrode 272 in the first sub-area 311 is the third direction Z1. Similarly, the extension directions of the branch electrode 272 in the second sub-area 312, the third sub-area 313, and the fourth sub-area 314 are the fourth direction Z2, the fifth direction Z3, and the sixth direction Z4, respectively), the width of a portion of the branch electrode 272 near the connection between the branch electrode 272 and the first trunk electrode 271a is greater than the width of a portion of the branch electrode 272 far from the connection between the branch electrode 272 and the first trunk electrode 271a. The width of the portion of the branch electrode 272 at the connection between the branch electrode 272 and the first main electrode 271a is greater than the width of the portion of the branch electrode 272 at the connection between the branch electrode 272 and the second main electrode 271b, and the width of the slit 273 corresponding to the portion of the branch electrode 272 near the connection between the branch electrode 272 and the first main electrode 271a is less than the width of the slit 273 corresponding to the portion of the branch electrode 272 far from the connection between the branch electrode 272 and the first main electrode 271a; the width of the portion of the branch electrode 272 near the connection between the branch electrode 272 and the second main electrode 271b is greater than the width of the portion of the branch electrode 272 far from the connection between the branch electrode 272 and the second main electrode 271b, and the width of the slit 273 corresponding to the portion of the branch electrode 272 near the connection between the branch electrode 272 and the second main electrode 271b is less than the width of the slit 273 corresponding to the portion of the branch electrode 272 far from the connection between the branch electrode 272 and the second main electrode 271b.

[0051] Specifically, in the first sub-region 311, the second sub-region 312, the third sub-region 313 and the fourth sub-region 314, in the extension direction of the branch electrode 272, the width of at least a portion of the branch electrode 272 decreases along the direction close to the connection between the branch electrode 272 and the first main electrode 271a to the direction away from the connection between the branch electrode 272 and the first main electrode 271a; the width of at least a portion of the branch electrode 272 decreases along the direction close to the connection between the branch electrode 272 and the second main electrode 271b to the direction away from the connection between the branch electrode 272 and the second main electrode 271b. By gradually decreasing the width of at least a portion of the branch electrode in the first sub-region, the second sub-region, the third sub-region, and the fourth sub-region along the direction from the connection between the branch electrode and the first main electrode to the direction away from the connection between the branch electrode and the first main electrode, and gradually decreasing the width of at least a portion of the branch electrode along the direction from the connection between the branch electrode and the second main electrode to the direction away from the connection between the branch electrode and the second main electrode, at least one of the first sub-region, the second sub-region, the third sub-region, and the fourth sub-region can have regions with different electric field strengths, thereby making the liquid crystal deflection angles different at different locations in the region, thereby improving the viewing angle.

[0052] Specifically, some branch electrodes will be connected to the first main electrode, and some branch electrodes will be connected to the second main electrode. Then, in the first sub-area, the second sub-area, the third sub-area and the fourth sub-area, respectively, in the third direction, the fourth direction, the fifth direction and the sixth direction, along the extension direction of the branch electrode, the width of the part of the branch electrode close to the first main electrode and the second main electrode is respectively greater than the width of the part of the branch electrode far away from the first main electrode and the second main electrode, and the width of the slit corresponding to the part of the branch electrode close to the first main electrode and the second main electrode is respectively smaller than the width of the slit corresponding to the part of the branch electrode far away from the first main electrode and the second main electrode. Therefore, by adjusting the line width of each branch electrode, different electric field strengths can be achieved in different areas, so that the liquid crystal deflection angle is different, thereby improving the viewing angle.

[0053] In some embodiments, as Figure 3 As shown, in at least one of the first sub-region 311, the second sub-region 312, the third sub-region 313, and the fourth sub-region 314, the width of the branch electrode 272 decreases, while the width of the slit 273 increases in the extension direction of the branch electrode 272. By decreasing the width of the branch electrode and increasing the width of the slit, the electric field strength in each region is different. In the four-domain design, within each region, the area close to the second trunk electrode can be considered the primary region, and the area away from the second trunk electrode can be considered the secondary region. Thus, the sub-pixel unit of the four-domain design achieves a display effect similar to that of an eight-domain design, improving the viewing angle.

[0054] Specifically, if the sum of the width of a part of the branch electrode and the corresponding slit is 6 microns, then in the region close to the second trunk electrode, the minimum width of the slit can be 2 microns or less, and the minimum width of the part of the branch electrode can be 4 microns or more; in the region far from the second trunk electrode, the minimum width of the slit can be 4 microns or more, and the minimum width of the other part of the branch electrode can be 2 microns or less.

[0055] Specifically, the width of the branch electrode can be decreased and the width of the slit can be increased in at least two of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, or in at least three of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, or in each of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region.

[0056] In some embodiments, as shown in FIG. 27, the width of at least a part of the branch electrode 272 increases in the direction from the connection between the branch electrode 272 and the trunk electrode 271 to the region far from the connection between the branch electrode 272 and the trunk electrode 271. By increasing the width of at least a part of the branch electrode in the direction from the connection between the branch electrode and the trunk electrode to the region far from the connection between the branch electrode and the trunk electrode, the electric field intensity at different positions in the region is different, so that the liquid crystal at different positions in the region deflects at different angles, thereby improving the viewing angle. Figure 5

[0057] In some embodiments, as shown in FIG. 27, the width of at least a part of the branch electrode 272 increases in the direction from the connection between the branch electrode 272 and the trunk electrode 271 to the region far from the connection between the branch electrode 272 and the trunk electrode 271. By increasing the width of at least a part of the branch electrode in the direction from the connection between the branch electrode and the trunk electrode to the region far from the connection between the branch electrode and the trunk electrode, the electric field intensity at different positions in the region is different, so that the liquid crystal at different positions in the region deflects at different angles, thereby improving the viewing angle. Figure 5 ​As shown, the pixel electrode 270 further comprises a connecting electrode 274 disposed on both sides of the first stem electrode 271a in at least one of the first sub-region 311, the second sub-region 312, the third sub-region 313 and the fourth sub-region 314, in the extension direction of the branch electrode 272, the branch electrode 272 comprises a first portion 272a and a second portion 272b disposed in sequence, the first portion 272a and the second portion 272b are connected, the second portion 272b is connected with the connecting electrode 274, the width of the first portion 272a decreases along the direction close to the second portion 272b, and the width of the second portion 272b decreases along the direction close to the first portion 272a. By making the width of the branch electrode decrease along the direction away from the second stem electrode, and making the width of the branch electrode decrease along the direction away from the connecting electrode, the width of the part of the branch electrode close to the second stem electrode and the part of the branch electrode close to the connecting electrode is greater than the width of the part between the part of the branch electrode close to the second stem electrode and the part of the branch electrode close to the connecting electrode, so that the area where the branch electrode is located can be regarded as two main regions close to the second stem electrode and the connecting electrode and a sub-region between the two main regions, so that the regions close to the second stem electrode and the connecting electrode are bright first, and the region between the two is bright later, thereby improving the viewing angle.

[0058] Specifically, the width of the slit corresponding to the first portion increases along the direction close to the second portion, and the width of the slit corresponding to the second portion increases along the direction close to the first portion.

[0059] Specifically, it can be understood that in at least two of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, or in at least three of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, or in each of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, in the extension direction of the branch electrode, the branch electrode comprises a first portion and a second portion disposed in sequence, the first portion and the second portion are connected, the second portion is connected with the connecting electrode, the width of the first portion decreases along the direction close to the second portion, and the width of the second portion decreases along the direction close to the first portion.

[0060] Specifically, the first portion and the second portion can be symmetrically disposed about a pair of symmetry axes.

[0061] Specifically, it can be understood that the first part and the second part are actually two parts of the branch electrode, and there is no clear dividing line between the two. The straight line where the part with the smallest width in the branch electrode is located can be used as the dividing line between the two. Accordingly, the width of the part of the first part close to the second main electrode is greater than the width of the part of the first part away from the second main electrode, and the width of the part of the second part close to the connecting electrode is greater than the width of the part of the second part away from the connecting electrode. The part of the first part close to the second main electrode can be regarded as the main area, the part of the second part close to the connecting electrode can be regarded as the main area, and the part of the first part away from the second main electrode and the part of the second part away from the connecting electrode can be regarded as sub-areas, thereby improving the viewing angle.

[0062] In some embodiments, as Figure 6 As shown, in at least one of the first sub-region 311, the second sub-region 312, the third sub-region 313, and the fourth sub-region 314, the branch electrode 272 includes a plurality of branch portions 272c. Within each branch portion 272c, the width of the branch portions 272c decreases in the direction in which the branch electrode 272 extends, while the width of the slits 273 between the branch portions 272c increases. By dividing the branch electrode into a plurality of branch portions, with the width of each branch portion decreasing in sequence and the width of the slits between the branch portions increasing in sequence, the number of partitions can be further increased, resulting in a greater number of different liquid crystal deflection angles, thereby further improving the viewing angle.

[0063] Specifically, each branch portion may be the same.

[0064] Specifically, the width of each branch portion may be gradually reduced in a direction away from the second trunk electrode.

[0065] Specifically, it can be understood that in at least two directions among the third direction, the fourth direction, the fifth direction and the sixth direction, or in at least three directions among the third direction, the fourth direction, the fifth direction and the sixth direction, or in each direction among the third direction, the fourth direction, the fifth direction and the sixth direction, the branch electrode includes multiple branch parts, and in each branch part, the width of the branch part decreases successively, and the width of the slit between the branch parts increases successively.

[0066] In some embodiments, within at least one of the first sub-region 311, the second sub-region 312, the third sub-region 313, and the fourth sub-region 314, the branch electrode 272 includes multiple portions, wherein the widths of at least two portions are equal, while the widths of the portions vary. When configuring the branch electrodes, the widths of the portions can be gradually reduced, or the widths of the portions can be kept constant while the widths of the portions vary. This results in different electric field strengths between the portions, thereby causing different liquid crystal deflection angles within the region, thereby improving the viewing angle.

[0067] In some embodiments, in at least one of the first sub-region 311, the second sub-region 312, the third sub-region 313, and the fourth sub-region 314, the branch electrode 272 includes multiple portions, each portion having equal widths, while the widths of the portions vary. By making the widths of the portions equal and the widths of the portions varying, the deflection angles of the liquid crystal in each region can be made different, thereby improving the viewing angle.

[0068] Specifically, in the above embodiments, the width of the branch electrodes decreases; the branch electrodes are divided into two parts, and the widths of the two parts decrease successively toward each other; and the widths of each branch part in the branch electrodes decrease successively are used as an example for explanation, but the embodiments of the present application are not limited to this. The widths of each part in the branch electrodes can be made different, but the widths in each part remain unchanged.

[0069] In some embodiments, as Figure 7 (a) and Figure 7 As shown in (c), the gate layer 22 includes a scan line 221, a gate 222, a first electrode 223, a second electrode 224, and a third electrode 225. The pixel electrode layer 27 also includes a fourth electrode 275. The scan line 221 is arranged along the second direction Y, the gate 222 is connected to the scan line 221, the first electrode 223 is arranged corresponding to the source and drain layer 25, the second electrode 224 is arranged corresponding to the first trunk electrode 271a, and the third electrode 225 is arranged corresponding to the fourth electrode 275. By arranging the first electrode, the second electrode, and the third electrode on the gate layer and arranging the fourth electrode on the pixel electrode layer, a storage capacitor can be formed by the first electrode, the second electrode, and the third electrode of the gate layer and the electrodes of the source and drain layer and the pixel electrode layer.

[0070] Specifically, such as Figure 7 As shown in (b), the source-drain electrode layer 25 includes a data line 251, a source electrode 252 and a drain electrode 253. The drain electrode 253 is arranged corresponding to the first electrode and is connected to the pixel electrode.

[0071] Specifically, Figure 7 Shown Figure 3The exploded diagram of each film layer of the array substrate in FIG. 1 is shown in FIG. 2 . It can be understood that the exploded diagram of each film layer of the array substrate in other embodiments can be referred to in FIG. Figure 7 Adaptive modifications are made and will not be described in detail here.

[0072] Specifically, such as Figure 2 As shown, the array substrate 2 further includes a gate insulating layer 23 , an active layer 24 and an interlayer insulating layer 26 .

[0073] Specifically, Figure 2 In the description, the thin film transistor in the array substrate is a bottom-gate top-contact thin film transistor as an example, but the embodiments of the present application are not limited thereto. The thin film transistor may have a top-gate structure or a bottom-contact structure.

[0074] Specifically, in the embodiment of the present application, an array substrate adopts a trigate design as an example, that is, one pixel unit is driven by three rows of scan lines to reduce the number of data lines, but the embodiment of the present application is not limited to this. The array substrate can adopt one pixel unit driven by one row of scan lines and three columns of data lines, or the array substrate can have other architectures.

[0075] Specifically, the above embodiments provide a detailed description of the array substrate from the perspective of the specific design of each film layer and the relative relationship between each film layer. It can be understood that when there is no conflict between the embodiments, the embodiments can be combined. For example, in at least one direction among the third direction, the fourth direction, the fifth direction and the sixth direction, the width of the branch electrode decreases and the width of the slit increases; and in at least one direction among the third direction, the fourth direction, the fifth direction and the sixth direction, the branch electrode includes a plurality of branch parts, and in each of the branch parts, the width of the branch part decreases successively, and the width of the slit between the branch parts increases successively.

[0076] At the same time, an embodiment of the present application provides a display panel, which includes the array substrate as described in any of the above embodiments.

[0077] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0078] The above is a detailed introduction to an array substrate and a display panel provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An array substrate, characterized in that: include: substrate; a gate layer, disposed on one side of the substrate; a source-drain electrode layer, disposed on a side of the gate layer away from the substrate; a pixel electrode layer, disposed on a side of the source / drain electrode layer away from the gate layer, the pixel electrode layer comprising pixel electrodes, the pixel electrodes comprising a trunk electrode, branch electrodes, and slits, the trunk electrodes comprising a first trunk electrode disposed along a first direction and a second trunk electrode disposed along a second direction; Wherein, in a direction from a connection point between the branch electrode and the main electrode to a connection point away from the branch electrode and the main electrode, the width of at least a portion of the branch electrode decreases gradually; The pixel electrode includes a first sub-region, a second sub-region, a third sub-region and a fourth sub-region formed by dividing the first main electrode and the second main electrode. The branch electrode located in the first sub-region extends along a third direction, the branch electrode located in the second sub-region extends along a fourth direction, the branch electrode located in the third sub-region extends along a fifth direction, and the branch electrode located in the fourth sub-region extends along a sixth direction. The third direction, the fourth direction, the fifth direction and the sixth direction have different angles with the first direction; in at least one of the first sub-region, the second sub-region, the third sub-region and the fourth sub-region, the branch electrode is composed of multiple branch parts, and in each of the branch parts, the width of the branch part decreases successively in the extension direction of the branch electrode.

2. The array substrate according to claim 1, wherein: The sum of the width of the portion of the branch electrode close to the second main electrode and the width of the slit corresponding to the portion of the branch electrode close to the second main electrode is equal to the sum of the width of the portion of the branch electrode away from the second main electrode and the width of the slit corresponding to the portion of the branch electrode away from the second main electrode.

3. The array substrate according to claim 1, wherein: The gate layer includes a scan line, a gate, a first electrode, a second electrode and a third electrode. The pixel electrode layer also includes a fourth electrode. The scan line is arranged along the second direction. The gate is connected to the scan line. The first electrode is arranged corresponding to the source and drain layer. The second electrode is arranged corresponding to the first main electrode. The third electrode is arranged corresponding to the fourth electrode.

4. A display panel, characterized in that: The invention comprises the array substrate according to any one of claims 1 to 3.

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