Display substrate and display device

Abstract

A display substrate and a display device. Each pixel unit in the display substrate comprises a gate structure extending along a first direction, a first display area located at a first side of the gate structure, and a second display area located at a second side of the gate structure; the first display area comprises at least two domains arranged at intervals in the first direction and a first interval located between the at least two domains and extending along a second direction, and the second display area comprises at least two domains arranged at intervals in the first direction and a second interval located between the at least two domains and extending along the second direction; each pixel unit further comprises a discharge line and a common electrode strip, the discharge line comprises a first conductive part and a second conductive part, the first conductive part extends along the second direction and is located at the first interval, and the second conductive part extends along the second direction and is located at the second interval; the common electrode strip is located at an edge of the first display area adjacent to a data line, and an edge of the second display area adjacent to the data line is not provided with the common electrode strip. Thus, the display substrate can improve the aperture ratio.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a display substrate and a display device. Background Technology

[0002] With the continuous development of display technology, display devices are increasingly widely used in various electronic products. Currently, display devices mainly include organic light-emitting diode (OLED) display devices and liquid crystal display (LCD) devices. OLED display devices typically include an anode, a cathode, and an organic light-emitting layer disposed between the anode and cathode; the OLED can generate current through the anode and cathode to drive the organic light-emitting layer to emit light and display the image.

[0003] On the other hand, a liquid crystal display device typically includes a display substrate with a thin-film transistor array, a counter substrate disposed opposite to the display substrate, and a liquid crystal layer located between the display substrate and the counter substrate. The liquid crystal display device can generate an electric field through pixel electrodes in the display substrate to change the rotation direction of liquid crystal molecules in the liquid crystal layer, and achieve display in conjunction with a polarizer. Based on the method of electric field driving, liquid crystal display devices can be divided into vertical liquid crystal display devices driven by a vertical electric field (e.g., VA mode) and horizontal liquid crystal display devices driven by a horizontal electric field (e.g., IPS or ADS mode). Summary of the Invention

[0004] This disclosure provides a display substrate and a display device. The display substrate further includes a substrate, a plurality of pixel units, and a plurality of data lines; the plurality of pixel units are arrayed on the substrate along a first direction and a second direction; the plurality of data lines are arranged along the first direction and each data line extends along the second direction; each pixel unit is located between two adjacent data lines, and each pixel unit includes a gate structure extending along the first direction, a first display area located on a first side of the gate structure, and a second display area located on a second side of the gate structure; the first display area includes at least two domains spaced apart in the first direction and a first interval located between the at least two domains and extending along the second direction, and the second display area includes at least two domains spaced apart in the first direction and a second interval located between the at least two domains and extending along the second direction; each pixel unit further includes a discharge line and a common electrode strip, the discharge line includes a first conductive portion and a second conductive portion, the first conductive portion extends along the second direction and is located at the first interval, the second conductive portion extends along the second direction and is located at the second interval, the common electrode strip is located at the edge of the first display area adjacent to the data lines, and no common electrode strip is provided at the edge of the second display area adjacent to the data lines. Therefore, the display substrate has discharge lines provided at the first interval of the first display area and the second interval of the second display area, which can avoid the discharge lines from affecting the aperture ratio of the pixel unit. Furthermore, the voltage on the pixel electrode can be finely adjusted by the discharge lines, thereby eliminating the need for the common electrode strip in the second display area and improving the aperture ratio of the display substrate.

[0005] At least one embodiment of this disclosure provides a display substrate, comprising: a substrate; a plurality of pixel units arrayed on the substrate along a first direction and a second direction; and a plurality of data lines arranged along the first direction, each data line extending along the second direction, each pixel unit located between two adjacent data lines, each pixel unit including a gate structure extending along the first direction, a first display area located on a first side of the gate structure, and a second display area located on a second side of the gate structure; the first display area including at least two domains spaced apart in the first direction and a first interval located between the at least two domains and extending along the second direction, the second display area including at least two domains spaced apart in the first direction and a second interval located between the at least two domains and extending along the second direction; each pixel unit further including a discharge line and a common electrode strip, the discharge line including a first conductive portion and a second conductive portion, the first conductive portion extending along the second direction and located at the first interval, the second conductive portion extending along the second direction and located at the second interval, the common electrode strip located at the edge of the first display area adjacent to the data line, and the edge of the second display area adjacent to the data line not having a common electrode strip.

[0006] For example, in a display substrate provided in an embodiment of this disclosure, the size of the effective light-emitting area of ​​the first display area in the first direction is smaller than the size of the effective light-emitting area of ​​the second display area in the first direction.

[0007] For example, in a display substrate provided in an embodiment of this disclosure, at least two domains of the first display area include a first domain, a second domain, a third domain, and a fourth domain. The first domain and the second domain are located on both sides of the first interval and are disposed opposite to each other. The third domain and the fourth domain are located on both sides of the first interval and are disposed opposite to each other. At least two domains of the second display area include a fifth domain, a sixth domain, a seventh domain, and an eighth domain. The fifth domain and the sixth domain are located on both sides of the second interval and are disposed opposite to each other. The seventh domain and the eighth domain are located on both sides of the second interval and are disposed opposite to each other.

[0008] For example, in a display substrate provided in an embodiment of this disclosure, each pixel unit further includes: a first pixel electrode; a second pixel electrode; a first control transistor including a gate, a first electrode, and a second electrode; and a second control transistor including a gate, a first electrode, and a second electrode; the gate of the first control transistor and the gate of the second control transistor are respectively connected to the gate structure, the first electrode of the first control transistor and the first electrode of the second control transistor are respectively connected to the data line, the second electrode of the first control transistor is connected to the first pixel electrode, and the second electrode of the second control transistor is connected to the second pixel electrode.

[0009] For example, in a display substrate provided in an embodiment of this disclosure, each pixel unit further includes a discharge transistor, including a gate, a first electrode, and a second electrode. The gate of the discharge transistor is connected to the gate structure, the first electrode of the discharge transistor is connected to the discharge line, and the second electrode of the discharge transistor is connected to the second pixel electrode.

[0010] For example, in a display substrate provided in an embodiment of this disclosure, each pixel unit further includes: a vertical common electrode line, the orthographic projection of the vertical common electrode line on the substrate overlaps with the orthographic projections of the first conductive portion and the second conductive portion on the substrate.

[0011] For example, in a display substrate provided in one embodiment of this disclosure, the vertical common electrode line and the gate structure are located in a first conductive layer, the discharge line and the data line are located in a second conductive layer, and the second conductive layer is located on the side of the first conductive layer away from the substrate.

[0012] For example, in a display substrate provided in an embodiment of this disclosure, each pixel unit further includes: a first capacitor, including a first electrode plate and a second electrode plate, the second electrode plate being located on the side of the first electrode plate away from the substrate, and the second electrode plate being connected to the second electrode of the first control transistor.

[0013] For example, in a display substrate provided in an embodiment of this disclosure, the first display area further includes: a horizontal common electrode line connected to the first electrode plate, and the first display area includes two common electrode strips located at two edges of the first display area near two adjacent data lines, and the two common electrode strips are connected to the horizontal common electrode line.

[0014] For example, in a display substrate provided in an embodiment of this disclosure, each pixel unit further includes: a second capacitor, including a third electrode block and a fourth electrode block, the second electrode block being located on the side of the first electrode block away from the substrate, the second electrode of the second control transistor and the second electrode of the discharge transistor being connected to the second electrode block, and the vertical common electrode line being connected to the third electrode block.

[0015] For example, in a display substrate provided in an embodiment of this disclosure, the first electrode block and two adjacent data lines are respectively provided with a first interval area and a second interval area, and the first interval area and the second interval area are light-transmitting areas.

[0016] For example, in a display substrate provided in one embodiment of this disclosure, the first spacing region and the second spacing region are not provided with a common electrode line.

[0017] For example, in a display substrate provided in one embodiment of this disclosure, the discharge line further includes a discharge connection portion that connects the first conductive portion and the second conductive portion; the orthographic projection portion of the discharge connection portion on the substrate surrounds the orthographic projection of the third electrode block on the substrate.

[0018] For example, in a display substrate provided in an embodiment of this disclosure, the gate structures of two adjacent pixel units in the first direction are connected and together form a gate line extending along the first direction. The gate line and the data line between the two adjacent pixel units have an overlapping area. In the overlapping area, the gate line includes a cutout portion and a first connecting portion and a second connecting portion located on both sides of the cutout portion in the second direction. The orthographic projection of the cutout portion on the substrate overlaps with the orthographic projection of the data line on the substrate.

[0019] For example, in a display substrate provided in an embodiment of this disclosure, the cutout portion includes a first edge and a second edge, the first edge and the second edge are respectively located on both sides of the data line in the first direction, the distance between the first edge and the data line is in the range of 3-10 micrometers, and the distance between the second edge and the data line is in the range of 3-10 micrometers.

[0020] For example, in a display substrate provided in an embodiment of this disclosure, the discharge line further includes a discharge connection portion that connects the first conductive portion and the second conductive portion; the orthographic projection of the discharge connection portion on the substrate overlaps with the orthographic projection of the gate structure on the substrate.

[0021] For example, in a display substrate provided in one embodiment of this disclosure, the shape of the orthographic projection of the connecting portion on the substrate includes a bevel, and the angle between the extension direction of the bevel and the first direction or the second direction is in the range of 20-70 degrees.

[0022] For example, in a display substrate provided in one embodiment of this disclosure, the angle between the extension direction of the inclined side and the first direction or the second direction is in the range of 40-50 degrees.

[0023] At least one embodiment of this disclosure also provides a display device comprising the display substrate described in any of the preceding claims. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0025] Figure 1A-1BThis is a simulation diagram of the electric field of a liquid crystal display device;

[0026] Figure 2 This is a plan view of a display substrate provided according to an embodiment of the present disclosure;

[0027] Figure 3 This is a planar schematic diagram of a pixel unit in a display substrate according to an embodiment of the present disclosure;

[0028] Figure 4A A partially enlarged schematic diagram of a pixel unit in a display substrate is shown;

[0029] Figure 4B This illustration shows a partially enlarged schematic diagram of a pixel unit in a display substrate according to an embodiment of the present disclosure;

[0030] Figure 5 This is a planar schematic diagram of a pixel unit in another display substrate provided in an embodiment of the present disclosure;

[0031] Figure 6 A planar schematic diagram of a pixel unit in another display substrate provided according to an embodiment of this disclosure; and

[0032] Figure 7 This is a schematic diagram of a display device provided according to an embodiment of the present disclosure. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure 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 disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0034] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an 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.

[0035] Unless otherwise defined, the characteristics such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include strictly defined cases of "parallel," "perpendicular," and "identical," as well as cases involving a certain margin of error, such as "approximately parallel," "approximately perpendicular," and "approximately identical." For example, the aforementioned "approximately" may indicate that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component or element is implied to mean that the component or element may be one or more, or can be understood as at least one. "At least one" refers to one or more, and "more" refers to at least two.

[0036] Based on the electric field driving method, liquid crystal display devices can generally be divided into vertically driven liquid crystal display devices (VA mode) and horizontally driven liquid crystal display devices (IPS or ADS mode). In their research, the inventors of this application noted that VA mode liquid crystal display devices, when combined with COA (Color Filter On Array) technology, not only have a significant advantage in contrast ratio compared to ADS and IPS mode liquid crystal display devices, but also a significant advantage in aperture ratio. However, in actual products, due to factors such as pixel unit domain division, the actual aperture ratio of VA mode liquid crystal display devices is not significantly higher than that of ADS and IPS mode liquid crystal display devices.

[0037] On the other hand, in order to improve the aperture ratio, conventional VA mode liquid crystal display devices will set common electrode strips on both sides of the data line to absorb the electric field of the data line, thereby reducing the influence of the data line on the voltage on the pixel electrode and thus achieving electric field shielding; at the same time, the common electrode strips and the data line can work together as a light-shielding structure, so that there is no need to set a black matrix on the data line.

[0038] Figure 1A-1B Figure 1 shows an electric field simulation diagram of a liquid crystal display device. As shown in Figure 1, when a common electrode strip is provided near the data line, the voltage equipotential lines near the pixel electrode are much sparser; that is, the pull of the data line on the pixel electrode is also much smaller. However, the inventors of this application have noticed that the provision of the common electrode strip reduces the aperture ratio of the pixel unit.

[0039] To further enhance the transmittance advantage of VA mode liquid crystal display devices and simultaneously increase product yield, this disclosure provides a display substrate and a display device. The display substrate further includes a substrate, multiple pixel units, and multiple data lines; the multiple pixel units are arrayed on the substrate along a first direction and a second direction; the multiple data lines are arranged along the first direction and extend along the second direction; each pixel unit is located between two adjacent data lines, and each pixel unit includes a gate structure extending along the first direction, a first display area located on a first side of the gate structure, and a second display area located on a second side of the gate structure; the first display area includes at least two domains spaced apart in the first direction and a first interval located between the at least two domains and extending along the second direction; the second display area includes at least two domains spaced apart in the first direction and a second interval located between the at least two domains and extending along the second direction; each pixel unit further includes a discharge line and a common electrode strip, the discharge line including a first conductive portion and a second conductive portion, the first conductive portion extending along the second direction and located at the first interval, the second conductive portion extending along the second direction and located at the second interval, the common electrode strip being located at the edge of the first display area adjacent to the data lines, and no common electrode strip being disposed at the edge of the second display area adjacent to the data lines. Therefore, the display substrate has discharge lines provided at the first interval of the first display area and the second interval of the second display area, which can avoid the discharge lines from affecting the aperture ratio of the pixel unit. Furthermore, the voltage on the pixel electrode can be finely adjusted by the discharge lines, thereby eliminating the need for the common electrode strip in the second display area and improving the aperture ratio of the display substrate.

[0040] The display substrate and display device provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0041] One embodiment of this disclosure provides a display substrate. Figure 2 This is a plan view of a display substrate provided according to an embodiment of the present disclosure; Figure 3 This is a planar schematic diagram of a pixel unit in a display substrate according to an embodiment of the present disclosure.

[0042] like Figure 2 and Figure 3As shown, the display substrate 100 further includes a substrate 110, a plurality of pixel units 120, and a plurality of data lines 130; the plurality of pixel units 120 are arrayed on the substrate 110 along a first direction and a second direction; the plurality of data lines 130 are arranged along the first direction and each data line 130 extends along the second direction. Each pixel unit 120 is located between two adjacent data lines 130, and each pixel unit 120 includes a gate structure 121 extending along the first direction, a first display area 120A located on a first side of the gate structure 121, and a second display area 120B located on a second side of the gate structure 121; the first display area 120A includes at least two domains 140 spaced apart in the first direction and a first interval S1 located between the at least two domains 140 and extending along the second direction, and the second display area 120B includes at least two domains 150 spaced apart in the first direction and a second interval S2 located between the at least two domains 150 and extending along the second direction. On one hand, the display substrate can improve its aperture ratio by setting a first display area and a second display area in a pixel unit, with the first display area being a bright display area and the second display area being a dark display area. This allows the first and second display areas to be displayed together as a single pixel unit. On the other hand, the display substrate can improve its viewing angle by setting multiple domains within the pixel unit.

[0043] like Figure 2 and Figure 3 As shown, each pixel unit 120 also includes a discharge line 122 and a common electrode strip 123. The discharge line 122 includes a first conductive part 122A and a second conductive part 122B. The first conductive part 122A extends along a second direction and is located at a first interval S1. The second conductive part 122B extends along a second direction and is located at a second interval S2. The common electrode strip 123 is located at the edge of the first display area 120A adjacent to the data line 130. The edge of the second display area 120B adjacent to the data line 130 does not have a common electrode strip 123.

[0044] In this embodiment, the display substrate has discharge lines disposed at a first interval in the first display area and a second interval in the second display area, thereby avoiding the discharge lines from affecting the aperture ratio of the pixel unit. On the other hand, since the pixel unit is provided with discharge lines and the second display area can be used as a dark display area, the display substrate can also fine-tune the voltage on the pixel electrode through the discharge lines to compensate for the pull of the data line on the pixel electrode in the second display area, thereby eliminating the need for a common electrode strip in the second display area and improving the aperture ratio of the display substrate.

[0045] In some examples, the substrate can be a glass substrate, a plastic substrate, or a quartz substrate; the substrate can be a rigid substrate or a flexible substrate.

[0046] In some examples, the data cable may be made of metals such as molybdenum, aluminum, copper, and silver.

[0047] In some examples, the first direction and the second direction described above are different directions; for example, the first direction and the second direction may be perpendicular to each other. Of course, embodiments of this disclosure include, but are not limited to, the first direction and the second direction may also intersect.

[0048] In some examples, the dimensions of the aforementioned common electrode strip in the first direction range from 2 to 4 micrometers. Of course, embodiments of this disclosure include, but are not limited to, this.

[0049] In some examples, such as Figure 2 and Figure 3 As shown, since the common electrode strip is eliminated in the second display area 120B, the effective light-emitting area of ​​the first display area 120A is smaller in the first direction than the effective light-emitting area of ​​the second display area 120B in the first direction. Therefore, the aperture ratio of the second display area is greater than that of the first display area.

[0050] In some examples, such as Figure 2 and Figure 3 As shown, each pixel unit 120 further includes a first pixel electrode 161, a second pixel electrode 162, a first control transistor T1, and a second control transistor T2. The first control transistor T1 includes a gate, a first electrode, and a second electrode; the second control transistor T2 includes a gate, a first electrode, and a second electrode. The gates of the first control transistor T1 and the second control transistor T2 are respectively connected to the gate structure 121. The first electrodes of the first control transistor T1 and the second control transistor T2 are respectively connected to the data line 130. The second electrode of the first control transistor T1 is connected to the first pixel electrode 161, and the second electrode of the second control transistor T2 is connected to the second pixel electrode 162. Therefore, the first display area and the second display area in each pixel unit can be displayed together.

[0051] In some examples, such as Figure 2 and Figure 3 As shown, each pixel unit 120 also includes a discharge transistor T3, which includes a gate, a first electrode, and a second electrode. The gate of the discharge transistor T3 is connected to the gate structure 121, the first electrode of the discharge transistor T3 is connected to the discharge line 122, and the second electrode of the discharge transistor T3 is connected to the second pixel electrode 162. Therefore, the display substrate can discharge the second pixel electrode through the discharge line and the discharge transistor, thereby adjusting the voltage on the second pixel electrode.

[0052] In some examples, such as Figure 2 and Figure 3As shown, the first display area 120A has at least two domains 140 including a first domain 141, a second domain 142, a third domain 143, and a fourth domain 144; the first domain 141 and the second domain 142 are located on both sides of the first interval and are arranged opposite to each other, and the third domain 143 and the fourth domain 144 are located on both sides of the first interval and are arranged opposite to each other; the second display area 120B has at least two domains 150 including a fifth domain 155, a sixth domain 156, a seventh domain 157, and an eighth domain 158; the fifth domain 155 and the sixth domain 156 are located on both sides of the second interval and are arranged opposite to each other, and the seventh domain 157 and the eighth domain 158 are located on both sides of the second interval and are arranged opposite to each other.

[0053] In some examples, such as Figure 2 and Figure 3 As shown, the first display area 120A also includes a lateral common electrode strip 124, located on the side of the third domain 143 and the fourth domain 144 away from the first domain 141 and the second domain 142. Therefore, the display substrate can reduce the resistance of the common electrode through the lateral common electrode strip. It should be noted that the aforementioned lateral common electrode strip can also be considered as being located between two adjacent pixel units in the second direction.

[0054] In some examples, such as Figure 2 and Figure 3 As shown, each pixel unit 120 also includes a vertical common electrode line 125; the orthographic projection of the vertical common electrode line 125 on the substrate 110 overlaps with the orthographic projection of the first conductive portion 122A and the second conductive portion 122B on the substrate 110. Therefore, the display substrate can provide vertical common electrode lines in the areas and positions occupied by discharge lines, thereby reducing the resistance of the common electrode lines and improving the voltage uniformity on the common electrode lines. Furthermore, the aforementioned vertical common electrode lines do not affect the aperture ratio of the pixel units. It should be noted that the aforementioned common electrode strips, horizontal common electrode strips, and vertical common electrode lines are all parts of the common electrode lines used to transmit common electrode signals.

[0055] To better illustrate the relationship between the vertical common electrode line and the discharge line, Figure 4A This diagram shows a partially enlarged schematic of a pixel unit in a display substrate. Figure 4B This diagram shows a partially enlarged schematic of a pixel unit in a display substrate according to an embodiment of the present disclosure. Figure 4A and Figure 4B Both show the first display area of ​​the previous pixel unit and the second display area of ​​the next pixel unit.

[0056] like Figure 4A As shown, the second display area 120B belonging to the next pixel unit is also provided with a common electrode strip 123; as Figure 4BAs shown, the second display area 120B, belonging to the next pixel unit, has eliminated the common electrode line 123. It can be seen that... Figure 4B The aperture ratio of the display substrate shown has been improved.

[0057] like Figure 4A As shown, the discharge line 122 extends along the second direction; as Figure 4B As shown, the orthographic projection of the vertical common electrode line 125 on the substrate 110 overlaps with the orthographic projection of the first conductive portion 122A and the second conductive portion 122B on the substrate 110. It can be seen that... Figure 4B The display substrate shown can have vertical common electrode lines positioned in the areas and locations occupied by the discharge lines, thereby reducing the resistance of the common electrode lines and improving the voltage uniformity on the common electrode lines. Furthermore, the aforementioned vertical common electrode lines do not affect the aperture ratio of the pixel units.

[0058] In some examples, such as Figure 2 and Figure 3 As shown, since the orthographic projection of the vertical common electrode line 125 on the substrate 110 overlaps with the orthographic projection of the first conductive portion 122A and the second conductive portion 122B on the substrate 110, the vertical common electrode 125 may also include a third conductive portion corresponding to the first conductive portion 122A and a fourth conductive portion corresponding to the second conductive portion 122B; the third conductive portion is located in the first interval, and the fourth conductive portion is located in the second interval.

[0059] In some examples, the dimension of the vertical common electrode line 125 in the first direction ranges from 5 to 9 micrometers. Of course, embodiments of this disclosure include, but are not limited to, this.

[0060] In some examples, such as Figure 2 and Figure 3 As shown, the vertical common electrode line 125 and the gate structure 121 are located in the first conductive layer 210, and the discharge line 122 and the data line 130 are located in the second conductive layer 220. The second conductive layer is located on the side of the first conductive layer 210 away from the substrate 110; that is, the discharge line 122 is at least partially located on the side of the vertical common electrode line 125 away from the substrate 110.

[0061] For example, the first conductive layer 210 described above can be a gate layer, and the second conductive layer 220 can be a source / drain metal layer.

[0062] In some examples, such as Figure 2 and Figure 3As shown, each pixel unit 120 also includes a first capacitor 126, which includes a first electrode plate 126A and a second electrode plate 126B; the second electrode plate 126B is located on the side of the first electrode plate 126A away from the substrate 110, and the second electrode plate 126B is connected to the second electrode of the first control transistor T1. Thus, the first display area can use the first capacitor to store the driving signal.

[0063] In some examples, such as Figure 2 and Figure 3 As shown, the first display area 120A also includes a horizontal common electrode line 127 connected to the first electrode plate 126A; the first display area 120A includes two common electrode strips 123, located at the two edges of the first display area 120A near the two adjacent data lines 130, and the two common electrode strips 123 are connected to the horizontal common electrode line 127. On the one hand, the horizontal common electrode line can apply a common electrode signal to the first electrode block; on the other hand, the common electrode line can also reduce the resistance of the common electrode line using the first electrode block. It should be noted that the aforementioned common electrode strips, horizontal common electrode strips, vertical common electrode lines, and horizontal common electrode lines are all parts of the common electrode line used to transmit common electrode signals.

[0064] In some examples, such as Figure 2 and Figure 3 As shown, the vertical common electrode 125 is connected to the horizontal common electrode 127 at the end of the first interval S1.

[0065] In some examples, such as Figure 2 and Figure 3 As shown, the discharge line 122 also includes a discharge connection portion 122C, which connects the first conductive portion 122A and the second conductive portion 122B; the orthogonal projection of the discharge connection portion 122C on the substrate 110 surrounds the orthogonal projection of the first electrode block 126A on the substrate 110.

[0066] In some examples, such as Figure 2 and Figure 3 As shown, the orthographic projection of the discharge connection portion 122C on the substrate 110 overlaps with the orthographic projection of the gate structure 121 on the substrate 110.

[0067] In some examples, each pixel unit 120 also includes a second capacitor 128, which includes a third electrode block 128A and a fourth electrode block 128B. The fourth electrode block 128B is located on the side of the third electrode block 128A away from the substrate 110. The second electrode of the second control transistor T2 and the second electrode of the discharge transistor T3 are connected to the fourth electrode block 128B, and the vertical common electrode line 125 is connected to the third electrode block 128A, thereby providing a common electrode signal to the third electrode block 128A.

[0068] In some examples, such as Figure 2 and Figure 3 As shown, the vertical common electrode line 125 and the third electrode block 128A are both located in the first conductive layer 210 and can be formed by the same conductive material through the same patterning process.

[0069] In some examples, such as Figure 2 and Figure 3 As shown, the fourth electrode block 128B and the discharge line 122 can be located in the second conductive layer 220 and can be formed by the same conductive material through the same patterning process.

[0070] In some examples, such as Figure 2 and Figure 3 As shown, the third electrode block 128A has a first spacing region 191 and a second spacing region 192 between it and two adjacent data lines 130, respectively. The first spacing region 191 and the second spacing region 192 are light-transmitting regions. In conventional designs, similar to the first electrode block, common electrode structures extending along a first direction are formed on the left and right sides of the third electrode block. This serves two purposes: firstly, it connects the third electrode block to the common electrode signal, and secondly, it can reduce the resistance of the common electrode line. However, such a design reduces the aperture ratio. Therefore, the display substrate provided in this embodiment uses the first and second spacing regions as light-transmitting regions to improve the aperture ratio.

[0071] In some examples, such as Figure 2 and Figure 3 As shown, no common electrode line is provided in the first interval region 191 and the second interval region 192.

[0072] like Figure 4A As shown, in order to provide a common electrode signal to the third electrode block 128A, common electrode structures extending along the first direction are formed on the left and right sides of the third electrode block 128A; as Figure 4B As shown, since the third electrode block 128A is connected to the vertical common electrode line 125, the vertical common electrode line 125 can provide a common electrode signal to the third electrode block 128A, thereby eliminating the need for the common electrode structures on the left and right sides of the third electrode block 128A, and thus improving the aperture ratio.

[0073] Figure 5 This is a planar schematic diagram of a pixel unit in another display substrate provided according to an embodiment of this disclosure. Figure 3 Unlike the pixel units shown, the shape of the discharge connection portion 122C of the discharge line 122 projected onto the substrate 110 includes a hypotenuse 1235, and the angle between the extending direction of the hypotenuse 1235 and the first or second direction ranges from 20 to 70 degrees. Therefore, the discharge connection portion can be routed diagonally during winding, thereby reducing the length of the discharge connection portion and lowering its resistance.

[0074] In some examples, such as Figure 5 As shown, the angle between the extension direction of the hypotenuse 1235 and the first or second direction ranges from 40 to 50 degrees.

[0075] In some examples, such as Figure 5 As shown, the distance between the orthographic projection of the discharge connection portion 122C on the substrate 110 and the orthographic projection of the fourth electrode block 128B on the substrate 110 ranges from 3 to 12 micrometers, thereby ensuring that exposure and etching can separate the discharge connection portion and the fourth electrode block.

[0076] In some examples, such as Figure 5 As shown, the distance D1 between the orthographic projection of the discharge connection portion 122C on the substrate 110 and the upper edge of the orthographic projection of the fourth electrode block 128B on the substrate 110, and the distance D2 between the discharge connection portion 122C and the left edge of the orthographic projection of the fourth electrode block 128B on the substrate 110, are both in the range of 3-12 micrometers, thereby ensuring that exposure and etching can separate the discharge connection portion and the fourth electrode block.

[0077] Figure 6 This is a planar schematic diagram of a pixel unit in another display substrate provided according to an embodiment of the present disclosure. Figure 6 As shown, the gate structures 121 of two adjacent pixel units 120 in the first direction are connected and together form a gate line 1210 extending along the first direction. The gate line 1210 overlaps with the data line 130 between the two adjacent pixel units 120. In this overlap area, the gate line 1210 includes a cutout portion 1212 and a first connecting portion 1213 and a second connecting portion 1214 located on both sides of the cutout portion 1212 in the second direction. The orthographic projection of the cutout portion 1212 on the substrate 110 overlaps with the orthographic projection of the data line 130 on the substrate 110. Thus, the gate line 1210 branches into two connecting portions in the area overlapping with the data line 130. In this case, when one of the two connecting portions is disconnected, the other can continue to transmit the gate signal, thereby improving the product yield of the display substrate. On the other hand, when one of the two connecting portions is short-circuited, for example, short-circuited with the data line, both ends of the connecting portion can be cut off. At this time, the other connecting portion can still transmit the gate signal, thereby enabling convenient maintenance.

[0078] It should be noted that in the overlapping area of ​​the gate line and data line, in order to reduce the overlapping capacitance, the gate line is designed to be thinner, for example, with a line width of only 5-15 micrometers. At this time, the gate line is prone to defects such as breakage in the overlapping area. In addition, short circuits are also prone to occur between the gate line and data line in the overlapping area. In a typical design, the gate line is only a single conductor in the overlapping area. When the above-mentioned breakage or short circuit occurs, one or more pixel units can only be repaired as dark spots by cutting or soldering. However, the display substrate provided in this embodiment of the present disclosure branches the gate line into two connecting parts by setting a cutout in the overlapping area. This improves the product yield on the one hand, and allows for the repair of pixel units to enable normal display on the other hand, thereby improving product quality.

[0079] In some examples, such as Figure 6 As shown, the cutout portion 1212 includes a first edge 1212A and a second edge 1212B, which are located on opposite sides of the data line 130 in a first direction. The distance between the first edge 1212A and the data line 130 ranges from 3 to 10 micrometers, and the distance between the second edge 1212B and the data line 130 also ranges from 3 to 10 micrometers. Therefore, the distances of the first connecting portion and the second connecting portion beyond the data line are also 3 to 10 micrometers, facilitating cutting, such as laser cutting.

[0080] At least one embodiment of this disclosure also provides a display device. Figure 7 This is a schematic diagram of a display device provided according to an embodiment of the present disclosure. Figure 7 As shown, the display device 300 includes the aforementioned liquid crystal display device 100. Therefore, the display device has technical effects corresponding to the beneficial technical effects of the liquid crystal display device it includes.

[0081] For example, the display device can be an electronic product with display function, such as a television, monitor, electronic picture frame, electronic photo frame, navigator, laptop, tablet computer, or smartphone.

[0082] The following points need to be explained:

[0083] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0084] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0085] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display substrate, comprising: a substrate substrate; a plurality of pixel units arranged in an array on the substrate substrate in a first direction and a second direction; and a plurality of data lines arranged in the first direction, each of the data lines extending in the second direction, wherein each of the pixel units is located between two adjacent data lines, each of the pixel units comprises a gate structure extending in the first direction, a first display area located at a first side of the gate structure, and a second display area located at a second side of the gate structure; the first display area comprises at least two domains arranged in the first direction with a first interval located between the at least two domains and extending in the second direction, and the second display area comprises at least two domains arranged in the first direction with a second interval located between the at least two domains and extending in the second direction; each of the pixel units further comprises a discharge line and a common electrode strip, the discharge line comprises a first conductive part and a second conductive part, the first conductive part extends in the second direction and is located in the first interval, the second conductive part extends in the second direction and is located in the second interval, the common electrode strip is located at an edge of the first display area adjacent to the data line, and an edge of the second display area adjacent to the data line is not provided with a common electrode strip, each of the pixel units further comprises a first pixel electrode, a second pixel electrode, a first control transistor comprising a gate, a first electrode and a second electrode, and a second control transistor comprising a gate, a first electrode and a second electrode, the gates of the first control transistor and the second control transistor are connected to the gate structure respectively, the first electrodes of the first control transistor and the second control transistor are connected to the data line respectively, the second electrode of the first control transistor is connected to the first pixel electrode, and the second electrode of the second control transistor is connected to the second pixel electrode, each of the pixel units further comprises a discharge transistor comprising a gate, a first electrode and a second electrode, the gate of the discharge transistor is connected to the gate structure, the first electrode of the discharge transistor is connected to the discharge line, and the second electrode of the discharge transistor is connected to the second pixel electrode, each of the pixel units further comprises a vertical common electrode line, a projection of the vertical common electrode line on the substrate substrate and projections of the first conductive part and the second conductive part on the substrate substrate all overlap each other. A size of an effective light-emitting area of the first display area in the first direction is smaller than a size of an effective light-emitting area of the second display area in the first direction. The at least two domains of the first display area comprise a first domain, a second domain, a third domain and a fourth domain, the first domain and the second domain are located on two sides of the first interval and arranged oppositely, and the third domain and the fourth domain are located on two sides of the first interval and arranged oppositely. ​ ​ ​ ​ ​ ​ ​ ​ 2.The display substrate of claim 1, wherein, ​ 3.The display substrate of claim 1, wherein, ​ The at least two domains of the second display area include a fifth domain, a sixth domain, a seventh domain and an eighth domain, the fifth domain and the sixth domain are located on two sides of the second interval and are oppositely arranged, and the seventh domain and the eighth domain are located on two sides of the second interval and are oppositely arranged. 4.The display substrate of any one of claims 1-3, wherein, The vertical common electrode line and the gate structure are located on a first conductive layer, the discharge line and the data line are located on a second conductive layer, and the second conductive layer is located on a side of the first conductive layer away from the substrate. 5.The display substrate according to any one of claims 1-3, wherein, Each of the pixel units further includes: a first capacitor including a first electrode plate and a second electrode plate, The second electrode plate is located on a side of the first electrode plate away from the substrate, and the second electrode plate is connected with the second electrode of the first control transistor. 6.The display substrate of claim 5, wherein, The first display area further includes: a horizontal common electrode line connected with the first electrode plate, The first display area includes two common electrode strips located on two edges of the first display area close to two adjacent data lines, respectively, and the two common electrode strips are connected with the horizontal common electrode line. 7.The display substrate of claim 5, wherein, Each of the pixel units further includes: a second capacitor including a third electrode plate and a fourth electrode plate, The fourth electrode plate is located on a side of the third electrode plate away from the substrate, the second electrode of the second control transistor and the second electrode of the discharge transistor are connected with the second electrode plate, and the vertical common electrode line is connected with the third electrode plate. 8.The display substrate of claim 7, wherein, The first electrode plate and the two adjacent data lines have a first interval and a second interval therebetween, respectively, and the first interval and the second interval are light-transmitting areas. 9.The display substrate of claim 8, wherein, The first interval and the second interval are not provided with a common electrode line. 10.The display substrate of claim 7, wherein, The discharge line further includes a discharge connecting portion connecting the first conductive portion and the second conductive portion; A projection of the discharge connecting portion on the substrate surrounds a projection of the third electrode plate on the substrate. 11.The display substrate of any one of claims 1-3, wherein, The gate structures of two adjacent pixel units in the first direction are connected and jointly form a gate line extending in the first direction, and the gate line and the data line between the two adjacent pixel units have an overlapping area. In the overlapping area, the gate line includes a hollow portion and first and second connecting portions located on two sides of the hollow portion in the second direction, and a projection of the hollow portion on the substrate overlaps a projection of the data line on the substrate. 12.The display substrate of claim 11, wherein, The hollow portion includes a first edge and a second edge, and the first edge and the second edge are located on two sides of the data line in the first direction, respectively. The distance between the first edge and the data line ranges from 3 to 10 microns, and the distance between the second edge and the data line ranges from 3 to 10 microns. 13.The display substrate of any one of claims 1-3, wherein, The discharge line further includes a discharge connecting portion connecting the first conductive portion and the second conductive portion; A projection of the discharge connecting portion on the substrate overlaps a projection of the gate structure on the substrate. 14.The display substrate of claim 13, wherein, A shape of a normal projection of the connection portion on the substrate includes a hypotenuse, and an included angle between an extension direction of the hypotenuse and the first direction or the second direction ranges from 20 degrees to 70 degrees. 15.The display substrate of claim 14, wherein, An included angle between an extension direction of the hypotenuse and the first direction or the second direction ranges from 40 degrees to 50 degrees.

16. A display device comprising the display substrate according to any one of claims 1 to 15.

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