Display panel

Abstract

The invention provides a display panel, the display panel comprises a plurality of sub-pixel units, each sub-pixel unit comprises a light-emitting device and at least two pixel driving circuits, each pixel driving circuit comprises a switch transistor and a first light-emitting control transistor, and the length of a conductor part in an active layer is compressed, so that the light-emitting effect of the light-emitting device is improved. The ratio of the length of the first conductor part in the active layer to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6, so that the area occupied by the pixel driving circuit can be reduced, and each light-emitting device is connected with at least two pixel driving circuits in the corresponding sub-pixel unit; when a single pixel driving circuit is abnormal, other pixel driving circuits connected with the light-emitting device can normally drive the light-emitting device to emit light, so that the risks of color missing and color cast caused by the abnormity of the single pixel driving circuit can be reduced, and the yield of the display panel can be improved.

Description

Technical Field

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

[0002] As organic light emitting diode (OLED) display technology becomes more and more popular, tablet computers and notebook computers have also begun to switch from liquid crystal display panels to organic light emitting diode display panels to increase the quality and color vividness of the picture and reduce the cost of backlight.

[0003] However, due to the large size of tablets and laptops, the corresponding pixel density (pixels per inch, PPI) is smaller than that of mobile phones. In order to ensure the service life and color vividness of the organic light-emitting diodes, the area of ​​the anode of the organic light-emitting diode is much larger than the area of ​​the anode of the organic light-emitting diode in small-sized mobile phones, that is, the opening of the pixel definition layer in tablets and laptops is much larger than that of mobile phones. However, in order to ensure the service life of organic light-emitting diodes, the brightness of tablets and laptops in high brightness mode (High Brightness Mode, HBM) cannot be greater than 1000 nits, mainly due to the high current requirements of high-brightness light-emitting diodes. Slight differences will cause bright and dark spots and color differences. In addition, for display panels with large-size sub-pixels, when a single sub-pixel is abnormal, the pixel unit will be missing a single color, resulting in color deficiency and color deviation, which ultimately leads to a low manufacturing yield of the display panel.

[0004] Therefore, it is necessary to provide a display panel to improve this defect. Summary of the invention

[0005] An embodiment of the present application provides a display panel, which can improve the yield rate of the display panel.

[0006] In order to achieve the above object, according to a first aspect of the present application, a display panel is provided, comprising a plurality of sub-pixel units, each of the sub-pixel units comprising a light-emitting device and at least two pixel driving circuits, the pixel driving circuit comprising a switch transistor and a first light-emitting control transistor, the switch transistor comprising a switch gate and a switch active portion, the switch gate being connected to a first scanning signal line, the first light-emitting control transistor comprising a first light-emitting control active portion;

[0007] Among them, the display panel includes an active layer, the active layer includes a first conductor part, the first conductor part is connected between the switch active part, the drive active part and the first light-emitting control active part; the first scanning signal line is extended along a first direction, and the first conductor part is extended along a second direction Y, and the first direction is different from the second direction; along the second direction, the ratio of the length of the first conductor part to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6; each of the light-emitting devices is electrically connected to at least two of the pixel driving circuits in a corresponding sub-pixel unit.

[0008] Optionally, the pixel driving circuit further comprises a compensation transistor and a first reset transistor, the compensation transistor comprises a compensation active portion, and the first reset transistor comprises a first reset active portion;

[0009] Wherein, along the second direction, a ratio of a distance between the compensation active portion and the first reset active portion to a length of the compensation active portion is greater than or equal to 3.5 and less than or equal to 5.5.

[0010] Optionally, the active layer includes a second conductor portion connected between the compensation active portion and the first reset active portion, and the second conductor portion at least partially extends along a third direction, and the third direction is arranged at an acute angle with the second direction.

[0011] Optionally, the active layer includes a third conductor portion, the third conductor portion is connected to an end of the switch active portion away from the first conductor portion, at least part of the third conductor portion extends along a fourth direction, and the fourth direction is arranged at an acute angle with the second direction.

[0012] Optionally, the third direction is arranged in parallel with the fourth direction.

[0013] Optionally, the pixel driving circuit includes a first pixel driving circuit and a second pixel driving circuit, the first pixel driving circuit and the second pixel driving circuit are adjacently arranged along the second direction, and the first pixel driving circuit and the second pixel driving circuit are connected to the anode of the same light-emitting device.

[0014] Optionally, the first light-emitting control transistor includes a first light-emitting control gate connected to a light-emitting control signal line; the first reset transistor includes a first reset gate connected to a second scanning signal line;

[0015] Among them, the first scanning signal line corresponding to the first pixel driving circuit is connected in parallel with the first scanning signal line corresponding to the second pixel driving circuit, the second scanning signal line corresponding to the first pixel driving circuit is connected in parallel with the second scanning signal line corresponding to the second pixel driving circuit, and the light-emitting control signal line corresponding to the first pixel driving circuit is connected in parallel with the light-emitting control signal line corresponding to the second pixel driving circuit.

[0016] Optionally, the pixel driving circuit further includes a third pixel driving circuit and a fourth pixel driving circuit;

[0017] Among them, the third pixel driving circuit and the fourth pixel driving circuit are arranged adjacent to each other along the second direction, the third pixel driving circuit and the first pixel driving circuit are arranged adjacent to each other along the first direction, the fourth pixel driving circuit and the second pixel driving circuit are arranged adjacent to each other along the first direction, and the first pixel driving circuit and the second pixel driving circuit, the third pixel driving circuit and the fourth pixel driving circuit are connected to the anode of the same light-emitting device.

[0018] Optionally, the pixel driving circuit comprises a driving transistor, a first electrode of the driving transistor is connected to a first node, a second electrode of the driving transistor is connected to a second node, and a driving gate of the driving transistor is connected to a third node;

[0019] The first electrode of the switch transistor is connected to the data signal line, and the second electrode of the switch transistor is connected to the first node;

[0020] The first electrode of the compensation transistor is connected to the third node, the second electrode of the compensation transistor is connected to the second node, and the compensation gate of the compensation transistor is connected to the first scanning signal line;

[0021] A first electrode of the first light emission control transistor is connected to a first power signal line, and a second electrode of the first light emission control transistor is connected to the first node;

[0022] A first electrode of the first reset transistor is connected to a first reset signal line, and a second electrode of the first reset transistor is connected to the third node.

[0023] Optionally, in the same sub-pixel unit, the output currents of the plurality of pixel driving circuits connected to the same light-emitting device are the same.

[0024] In the display panel of the embodiment of the present application, each sub-pixel unit includes a light-emitting device and at least two pixel driving circuits. By compressing the length of the conductive part in the active layer so that the ratio of the length of the first conductive part in the active layer to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6, the area occupied by the pixel driving circuit can be reduced, so that each light-emitting device can be electrically connected to at least two pixel driving circuits in a corresponding sub-pixel unit. When a single pixel driving circuit is abnormal, other pixel driving circuits connected to the light-emitting device can normally drive the light-emitting device to emit light. In this way, the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit can be reduced, thereby improving the yield of the display panel.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0027] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0028] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a sub-pixel unit in a display panel provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of a pixel driving circuit in a display panel provided in an embodiment of the present application;

[0031] Figure 4 A film layer diagram of an active layer of a display panel provided in an embodiment of the present application;

[0032] Figure 5 A film layer diagram of a first gate layer provided in an embodiment of the present application;

[0033] Figure 6 A stacking diagram of an active layer and a first gate layer provided for an embodiment of the present application;

[0034] Figure 7 A schematic diagram of another sub-pixel unit in a display panel provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of another pixel driving circuit in a display panel provided in an embodiment of the present application;

[0036] Fig. 9 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. substrate; 11. first organic substrate; 12. first inorganic substrate; 13. second organic substrate; 14. barrier layer; 15. second inorganic substrate 15; 101. sub-pixel unit;

[0039] 2. driving circuit layer; 201. buffer layer; 202. active layer; 2021. first conductive part; 2022. second conductive part; 2023. third conductive part; 203. first gate insulating layer; 204. first gate layer; 205. second gate insulating layer; 206. second gate layer; 207. interlayer dielectric layer; 208. first source-drain electrode layer; 209. first planar layer; 210. second source-drain electrode layer; 211. second planar layer; 20. pixel driving circuit; 21. first pixel driving circuit; 22. second pixel driving circuit; 23. third pixel driving circuit; 24. fourth pixel driving circuit;

[0040] 3. Light-emitting device layer; 301. Anode; 302. Pixel definition layer; 303. Spacer layer; 31. Light-emitting device;

[0041] T1, driving transistor; T2, switching transistor; T3, compensation transistor; T4, first reset transistor; T5, first light emission control transistor; T6, second light emission control transistor; T7, second reset transistor;

[0042] 100. Display panel; 200. Housing; 1000. Display device. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0044] The present application provides a display panel, which includes a plurality of sub-pixel units, each of which includes a light-emitting device and at least two pixel driving circuits, wherein the pixel driving circuit includes a switch transistor and a first light-emitting control transistor, wherein the switch transistor includes a switch gate and a switch active portion, wherein the switch gate is connected to a first scanning signal line, and the first light-emitting control transistor includes a first light-emitting control active portion, wherein the display panel includes an active layer, wherein the active layer includes a first conductor portion, wherein the first conductor portion is connected between the switch active portion and the first light-emitting control active portion; wherein the first scanning signal line is extended along a first direction, and the first conductor portion is extended along a second direction Y, wherein the first direction is different from the second direction; wherein along the second direction, a ratio of a length of the first conductor portion to a length of the first light-emitting control active portion is greater than or equal to 4 and less than or equal to 6, and wherein each light-emitting device is connected to at least two adjacent pixel driving circuits in a corresponding sub-pixel unit.

[0045] In this embodiment, by compressing the length of the conductive part in the active layer so that the ratio of the length of the first conductive part in the active layer to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6, the area occupied by the pixel driving circuit can be reduced, so that each light-emitting device in the light-emitting device layer is connected to at least two pixel driving circuits in a corresponding sub-pixel unit. When a single pixel driving circuit is abnormal, other pixel driving circuits connected to the light-emitting device can normally drive the light-emitting device to emit light, thereby reducing the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit, thereby improving the yield rate of the display panel.

[0046] Combination Figure 1 As shown, Figure 1 A structural schematic diagram of a display panel provided in an embodiment of the present application, wherein the display panel 100 includes a substrate 1, a driving circuit layer 2 and a light-emitting device layer 3, wherein the driving circuit layer 2 is arranged on one side of the substrate 1, and the light-emitting device layer 3 is arranged on a side of the driving circuit layer 2 away from the substrate 1.

[0047] In some embodiments, substrate 1 may be a single-layer flexible substrate made of an organic material, substrate 1 may be a single-layer hard substrate made of an inorganic material, or substrate 1 may be a multi-layer flexible substrate formed by stacking at least one layer of organic material and at least one layer of inorganic material, wherein the organic material may be transparent polyimide and the inorganic material may be glass.

[0048] In some embodiments, Figure 1As shown, the substrate 1 is a multi-layer flexible substrate structure formed by stacking organic materials and inorganic materials. Specifically, the substrate 1 includes a first organic substrate 11, a first inorganic substrate 12, a second organic substrate 13, a barrier layer 14 and a second inorganic substrate 15. The materials of the first organic substrate 11 and the second organic substrate 13 are polyimide, the materials of the first inorganic substrate 12 and the second inorganic substrate 15 are selected from at least one of silicon nitride and silicon oxide, and the material of the barrier layer 14 can be an organic material such as polyimide, or an inorganic material such as silicon nitride or silicon oxide.

[0049] In some embodiments, the driving circuit layer 2 includes a buffer layer 201, an active layer 202, a first gate insulation layer 203, a first gate layer 204, a second gate insulation layer 205, a second gate layer 206, an interlayer dielectric layer 207, a first source and drain layer 208, a first planarizing layer 209, a second source and drain layer 210 and a second planarizing layer 211 which are sequentially stacked on the substrate 1.

[0050] like Figure 1 As shown, the buffer layer 201 is disposed on the surface of the second inorganic substrate 15 of the substrate 1 away from the barrier layer 14 , and the buffer layer 201 may be a single-layer structure or a stacked-layer structure formed of at least one of silicon nitride, silicon oxide and silicon oxynitride.

[0051] like Figure 1 As shown, the active layer 202 is arranged on the surface of the buffer layer 201 away from the substrate 1, and the material of the active layer 202 is selected from any one of a silicon semiconductor material and a metal oxide semiconductor material. The silicon semiconductor material can be specifically amorphous silicon or low-temperature polycrystalline silicon, and the metal oxide semiconductor material can be specifically indium gallium zinc oxide.

[0052] In the embodiment of the present application, the material of the active layer 202 is low temperature polysilicon.

[0053] like Figure 1 As shown, the first gate insulating layer 203, the second gate insulating layer 205 and the interlayer dielectric layer 207 are respectively arranged on the corresponding metal layer or active layer, so that the metal layers or active layers of different layers are separated and insulated. The first gate insulating layer 203, the second gate insulating layer 205 and the interlayer dielectric layer 207 can all be a single-layer structure or a stacked-layer structure formed by at least one of silicon nitride, silicon oxide and silicon oxynitride.

[0054] like Figure 1As shown, the first gate layer 204, the second gate layer 206, the first source-drain layer 208 and the second source-drain layer 210 are respectively arranged on the corresponding insulating layer or the interlayer dielectric layer. The first gate layer 204, the second gate layer 206, the first source-drain layer 208 and the second source-drain layer 210 can be a single-layer structure formed by at least one of copper, molybdenum, titanium, aluminum, silver, etc., or a stacked-layer structure formed by at least two of the above-mentioned metal materials.

[0055] like Figure 1 As shown, the first planar layer 209 is disposed on the first source-drain electrode layer 208 , and the second planar layer 211 is disposed on the second source-drain electrode layer 210 . The materials of the first planar layer 209 and the second planar layer 211 may be organic insulating materials with leveling properties.

[0056] like Figure 1 As shown, the display panel 100 further includes a light emitting device layer 3, which is disposed on a side of the second planar layer 211 away from the second source-drain electrode layer 210. The light emitting device layer 3 includes an anode 301 disposed on the second planar layer 211, a pixel definition layer 302 disposed on the anode 301, a spacer layer 303 disposed on the pixel definition layer 302, a light emitting material layer disposed on the pixel definition layer 302, and a cathode layer (not shown in the figure).

[0057] In the embodiment of the present application, the light emitting device layer 3 may include a plurality of light emitting devices 31 , wherein the light emitting device 31 is an organic light emitting diode, and the organic light emitting diode includes the anode 301 , the light emitting layer and the cathode as described above.

[0058] Combination Figure 1 and Figure 2 As stated, Figure 2 A schematic diagram of a sub-pixel unit in a display panel provided in an embodiment of the present application, wherein the driving circuit layer 2 includes a plurality of scanning signal lines and a plurality of data signal lines, wherein the scanning signal lines are extended along a first direction X, and the data signal lines are extended along a second direction Y, and the first direction X is different from the second direction Y.

[0059] In the embodiment of the present application, the first direction X and the second direction Y are perpendicular to each other.

[0060] Combination Figure 1 and Figure 2 As described, the display panel 100 includes a plurality of sub-pixel units 101, wherein the plurality of sub-pixel units 101 are arranged in rows at intervals along a first direction X, and the plurality of sub-pixel units 101 are arranged in columns at intervals along a second direction Y, forming a plurality of rows and columns of sub-pixel units 101 arranged in an array, and each sub-pixel unit 101 includes a light-emitting device 31 and at least two pixel driving circuits 20.

[0061] In an embodiment of the present application, each light-emitting device 31 is connected to at least two of the pixel driving circuits 20 in a corresponding sub-pixel unit 101, so that at least two pixel driving circuits 20 in the same sub-pixel unit 101 can be used to drive one light-emitting device 31 at the same time. When one of the pixel driving circuits is abnormal, the other pixel driving circuits connected to the light-emitting device 31 can normally drive the light-emitting device 31 to emit light. In this way, the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit can be reduced, thereby improving the yield rate of the display panel.

[0062] See also Figure 3 , Figure 3 A schematic diagram of a pixel driving circuit in a display panel provided in an embodiment of the present application, wherein the pixel driving circuit 20 includes a driving transistor T1, a switching transistor T2, a compensation transistor T3, and a first light emission control transistor T5, wherein the second electrode of the switching transistor T2 is connected to the first node A, and the switch gate T2G of the switching transistor T2 is connected to the first scanning signal line scan1. The first electrode of the driving transistor T1 is connected to the first node A, the second electrode of the driving transistor T1 is connected to the second node B, and the driving gate T1G of the driving transistor T1 is connected to the third node Q. The first electrode of the compensation transistor T3 is connected to the third node Q, the second electrode of the compensation transistor T3 is connected to the second node B, and the compensation gate T3G of the compensation transistor T3 is connected to the first scanning signal line scan1. The first electrode of the first light emission control transistor T5 is connected to the first power supply signal line VDD, the second electrode of the first light emission control transistor T5 is connected to the first node A, and the first light emission control gate T5G of the first light emission control transistor T5 is connected to the light emission control signal line EM.

[0063] It should be noted that, in the embodiments of the present application, the first electrode of the transistor refers to one of the source and the drain, and the second electrode of the transistor refers to the other of the source and the drain.

[0064] See also Figures 4 to 6 , Figure 4 A film layer diagram of an active layer of a display panel provided in an embodiment of the present application, Figure 5 A film layer diagram of the first gate layer provided in an embodiment of the present application, Figure 6The stacking diagram of the active layer and the first gate layer provided in the embodiment of the present application, the active layer 202 includes the switch active part T2A of the switch transistor T2, the driving active part T1A of the driving transistor T1, the first light-emitting control active part T5A of the first light-emitting control transistor T5 and the first conductor part 2021, the first conductor part 2021 is connected between the switch active part T2A, the driving active part T1A and the first light-emitting control active part T5A. The first scanning signal line scan1 is extended along the first direction X, and the first conductor part 2021 is extended along the second direction Y, and the first direction X is different from the second direction Y. Along the second direction Y, the ratio of the length L1 of the first conductor part 2021 to the length L2 of the first light-emitting control active part T5A is greater than or equal to 4 and less than or equal to 6.

[0065] In this embodiment, by compressing the length of the conductive part in the active layer 202 along the second direction Y, so that the ratio of the length L1 of the first conductive part 2021 in the active layer 202 to the length L1 of the first light-emitting control active part T5A is greater than or equal to 4 and less than or equal to 6, the area occupied by the pixel driving circuit can be reduced to free up space for adding more pixel driving circuits, so that each light-emitting device can be electrically connected to at least two pixel driving circuits in a corresponding sub-pixel unit. When a single pixel driving circuit is abnormal, other pixel driving circuits connected to the light-emitting device can normally drive the light-emitting device to emit light, so that the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit can be reduced, thereby improving the yield rate of the display panel.

[0066] See also Figure 5 The first scan signal line Pscan1, the second scan signal line Pscan2 and the light emitting control signal line EM are all extended along the first direction X, and the first scan signal line Pscan1, the second scan signal line Pscan2 and the light emitting control signal line EM are arranged at intervals along the second direction Y.

[0067] In some embodiments, see Figure 3 The pixel driving circuit 20 further includes a first reset transistor T4, a first electrode of the first reset transistor T4 is connected to the first reset signal line Vi1, and a second electrode of the first reset transistor T4 is connected to the third node Q.

[0068] In some embodiments, see Figures 4 to 6, along the second direction Y, the ratio of the distance L3 between the compensation active portion T3A and the first reset active portion T4A to the length L4 of the compensation active portion T3A is greater than or equal to 3.5 and less than or equal to 5.5. By compressing the length of the conductive portion in the active layer 202 along the second direction Y, so that the ratio of the distance L3 between the compensation active portion T3A and the first reset active portion T4A to the length L4 of the compensation active portion T3A is greater than or equal to 3.5 and less than or equal to 5.5, the area occupied by the pixel driving circuit can be further reduced to free up more space for adding pixel driving circuits, so that each light-emitting device can be electrically connected to at least two pixel driving circuits in a corresponding sub-pixel unit, when a single pixel driving circuit is abnormal, other pixel driving circuits connected to the light-emitting device can normally drive the light-emitting device to emit light, so that the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit can be reduced, thereby improving the yield rate of the display panel.

[0069] In some embodiments, see Figures 4 to 6 The active layer 202 includes a second conductor portion 2022, which is connected between the compensation active portion T3A and the first reset active portion T4A of the first reset transistor T4. The second conductor portion 2022 is at least partially extended along the third direction X1, and the third direction X1 is arranged at an acute angle with the second direction Y. In this way, at least a portion of the second conductor portion 2022 can be inclined to reduce the space occupied by the second conductor portion 2022 along the second direction Y, thereby reducing the distance between the first scanning signal line snca1 and the second scanning signal line scan2, thereby reducing the area occupied by the pixel driving circuit.

[0070] See also Figure 4 The portion of the second conductive portion 2022 connected to the compensation active portion T3A can be used as the first electrode of the compensation transistor T3A, and the portion of the second conductive portion 2022 connected to the first reset active portion T4A can be used as the first electrode of the first reset transistor T4.

[0071] In some embodiments, see Figures 4 to 6 The active layer 202 includes a third conductive portion 2023, the third conductive portion 2023 is connected to an end of the switch active portion T2A away from the first conductive portion 2021, at least a portion of the third conductive portion 2023 is extended along a fourth direction X2, and the fourth direction X2 is arranged at an acute angle with the second direction Y, so that at least a portion of the third conductive portion 2023 can be inclined to reduce the space occupied by the third conductive portion 2023 along the second direction Y, thereby reducing the distance between the first scanning signal line snca1 and the second scanning signal line scan2, thereby reducing the area occupied by the pixel driving circuit.

[0072] See also Figure 4 The first conductive portion 2021 can serve as a first electrode of the switching transistor T2.

[0073] In some embodiments, see Figures 4 to 6 The third direction X1 is arranged in parallel with the fourth direction X2, that is, at least a portion of the second conductor portion 2022 is arranged in parallel with at least a portion of the third conductor portion 2023, so that the space occupied by the second conductor portion 2022 and the third conductor portion 2023 along the second direction Y can be further reduced, thereby reducing the distance between the first scanning signal line snca1 and the second scanning signal line scan2, thereby reducing the area occupied by the pixel driving circuit.

[0074] In some embodiments, Figure 2 As shown, the pixel driving circuit 20 includes a first pixel driving circuit 21 and a second pixel driving circuit 22. The first pixel driving circuit 21 and the second pixel driving circuit 22 are adjacently arranged along the second direction Y, and the first pixel driving circuit 21 and the second pixel driving circuit 22 are connected to the anode of the same light-emitting device 31.

[0075] The first pixel driving circuit 21 and the second pixel driving circuit 22 can simultaneously drive the light-emitting device 31 to emit light. When any one of the first pixel driving circuit 21 and the second pixel driving circuit 22 is abnormal, the other one of the first pixel driving circuit 21 and the second pixel driving circuit 22 can normally drive the light-emitting device 31 to emit light. This can reduce the risk of color deficiency and color deviation caused by the abnormality of a single pixel driving circuit, thereby improving the yield rate of the display panel.

[0076] In some embodiments, the output currents of the first pixel driving circuit 21 and the second pixel driving circuit 22 are the same. Since the output terminals of the first pixel driving circuit 21 and the second pixel driving circuit 22 are connected in parallel to the anode of the same light emitting device 31, the total current received by the light emitting device 31 is the sum of the output current of the first pixel driving circuit 21 and the output current of the second pixel driving circuit 22.

[0077] Compared with conventional technology, when the brightness of the light-emitting device 31 remains unchanged, that is, the total current received by the light-emitting device 31 is the same as the total current received by the light-emitting device in the conventional technology, the output current of the first pixel driving circuit 21 in the embodiment of the present application is half of the total current received by the light-emitting device 31, and the output current of the second pixel driving circuit 22 is also half of the total current received by the light-emitting device 31, thereby improving the color deviation caused by reducing the short-range unevenness of the current.

[0078] Compared with conventional technology, when the size of the light-emitting device 31 is the same, the brightness of the light-emitting device 31 in the embodiment of the present application can be increased to twice that of conventional technology by increasing the output current of the first pixel driving circuit 21 and the second pixel driving circuit 22, that is, in high-brightness mode, the brightness of the display panel can reach 2000 nits.

[0079] Compared with conventional technologies, the embodiments of the present application can reduce the probability of display color deficiency and color deviation caused by an abnormality of a single pixel driving circuit to 50%, thereby improving the yield rate of the display panel.

[0080] In some embodiments, Figure 3 As shown, the output end of the first pixel driving circuit 21 and the output end of the second pixel driving circuit 22 are connected to the anode of the same light-emitting device 31. The first scanning signal line Pscan1 corresponding to the first pixel driving circuit 21 is connected in parallel with the first scanning signal line Pscan1 corresponding to the second pixel driving circuit 22. In the data writing stage, the first scanning signal line Pscan1 can simultaneously turn on the switching transistor T2 and the compensation transistor T3 in the first pixel driving circuit 21 and the second pixel driving circuit 22, and output the potential of the data signal line Data to the third node Q, so as to simultaneously turn on the driving transistor T1 in the first pixel driving circuit 21 and the second pixel driving circuit 22, and output the first power signal transmitted by the first power signal line received by the first pixel driving circuit 21 and the second pixel driving circuit 22 to the anode of the light-emitting device 31 through the driving transistor T1, so that the first pixel driving circuit 21 and the second pixel driving circuit 22 can drive the light-emitting device 31 together.

[0081] In some embodiments, Figure 3 As shown, the pixel driving circuit 20 further includes a second light emitting control transistor T6, a first electrode of the second light emitting control transistor T6 is connected to the second node B, a second electrode of the second light emitting control transistor T6 is connected to the anode of the light emitting device 31, a second light emitting control gate T6G of the second light emitting control transistor T6 is connected to the light emitting control signal line EM, and a cathode of the light emitting device 31 is connected to the second power signal line VSS. The first power signal transmitted by the first power signal line VDD is a DC high voltage signal, and the second power signal transmitted by the second power signal line VSS is a DC low voltage signal.

[0082] like Figure 3As shown, the light-emitting control signal line EM corresponding to the first pixel driving circuit 21 is connected in parallel with the light-emitting control signal line EM corresponding to the second pixel driving circuit 22. In the light-emitting stage, the light-emitting control signal line EM simultaneously controls the first light-emitting control transistor T5 and the second light-emitting control transistor T6 in the first pixel driving circuit 21 and the second pixel driving circuit 22 to turn on, and the driving transistor T1 outputs the first power signal transmitted by the first power signal line received by the first pixel driving circuit 21 and the second pixel driving circuit 22 to the anode of the light-emitting device 31, so that the first pixel driving circuit 21 and the second pixel driving circuit 22 can drive the light-emitting device 31 together.

[0083] In some embodiments, Figure 3 As shown, the pixel driving circuit 20 also includes a second reset transistor T7, a first electrode of the second reset transistor T7 is connected to the second reset signal line Vi2, a second electrode of the second reset transistor T7 is connected to the anode of the light emitting device 31, and a second reset gate T7G of the second reset transistor T7 is connected to the second scanning signal line Pscan2.

[0084] like Figure 3 As shown, the second scanning signal line Pscan2 corresponding to the first pixel driving circuit 21 is connected in parallel with the second scanning signal line Pscan2 corresponding to the second pixel driving circuit 22. In the data writing stage, the second scanning signal line simultaneously controls the second reset transistor T7 in the first pixel driving circuit 21 and the second pixel driving circuit 22 to turn on, so as to simultaneously reset the potential of the light emitting device 31.

[0085] In some embodiments, Figure 3 As shown, any one of the first pixel driving circuit 21 and the second pixel driving circuit 22 further includes a storage capacitor Cst, a first plate of the storage capacitor Cst is connected to the first power signal line VDD, and a second plate of the storage capacitor Cst is connected to the third node Q.

[0086] In some embodiments, Figure 7 As shown, Figure 7 A schematic diagram of another sub-pixel unit in a display panel provided in an embodiment of the present application, wherein the pixel driving circuit 20 further includes a third pixel driving circuit 23 and a fourth pixel driving circuit 24 .

[0087] like Figure 7As shown, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 are arranged adjacent to each other along the second direction Y, the third pixel driving circuit 23 and the first pixel driving circuit 21 are arranged adjacent to each other along the first direction X, the fourth pixel driving circuit 24 and the second pixel driving circuit 22 are arranged adjacent to each other along the first direction X, and the first pixel driving circuit 21 and the second pixel driving circuit 22, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 are connected to the anode of the same light-emitting device 31. In this way, the four pixel driving circuits in the same sub-pixel unit 101 can be used to drive the light-emitting device 31 at the same time. When one of the pixel driving circuits is abnormal, the other three pixel driving circuits connected to the light-emitting device 31 can normally drive the light-emitting device 31 to emit light, so that the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit can be further reduced, thereby further improving the yield rate of the display panel.

[0088] In some embodiments, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 have the same circuit structure as the first pixel driving circuit 21, the first pixel driving circuit 21 and the third pixel driving circuit 23 are connected to the same first scanning signal line Pscan1 and the second scanning signal line Pscan2, and the second pixel driving circuit 22 and the fourth pixel driving circuit 24 are connected to the same first scanning signal line Pscan1 and the second scanning signal line Pscan2.

[0089] like Figure 7 As shown, the first pixel driving circuit 21 and the third pixel driving circuit 23 are two adjacent pixel driving circuits in the same row of pixel driving circuits, the second pixel driving circuit 22 and the fourth pixel driving circuit 24 are two adjacent pixel driving circuits in the same row of pixel driving circuits, the first pixel driving circuit 21 and the second pixel driving circuit 22, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 are distributed in a rectangular shape, and the output ends of the first pixel driving circuit 21 and the second pixel driving circuit 22, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 are connected to the anode of the same light-emitting device 31.

[0090] like Figure 8 As shown, Figure 8 A schematic diagram of a pixel driving circuit in another display panel provided in an embodiment of the present application, wherein the third pixel driving circuit 23 and the fourth pixel driving circuit 24 have the same circuit structure as the first pixel driving circuit 21, and the first pixel driving circuit 21, the second pixel driving circuit 22, the third pixel driving circuit 23 and the fourth pixel driving circuit 24 are all 7T1C pixel driving circuits.

[0091] In some embodiments, the output current of the first pixel driving circuit 21 is the same as that of the second pixel driving circuit 22, the third pixel driving circuit 23, and the fourth pixel driving circuit 24. Since the output terminals of the first pixel driving circuit 21, the second pixel driving circuit 22, the third pixel driving circuit 23, and the fourth pixel driving circuit 24 are connected in parallel to the anode of the same light-emitting device 31, the total current received by the light-emitting device 31 is the sum of the output currents of the first pixel driving circuit 21, the second pixel driving circuit 22, the third pixel driving circuit 23, and the fourth pixel driving circuit 24.

[0092] Compared with conventional technology, when the brightness of the light-emitting device 31 remains unchanged, that is, the total current received by the light-emitting device 31 is the same as the total current received by the light-emitting device in the conventional technology, the output current of the first pixel driving circuit 21 in the embodiment of the present application is one quarter of the total current received by the light-emitting device 31, and the output currents of the other three pixel driving circuits are also one quarter of the total current received by the light-emitting device 31. This can further improve the color deviation caused by reducing the short-range current unevenness.

[0093] Compared with conventional technology, when the size of the light-emitting device 31 is the same, by increasing the output current of the first pixel driving circuit 21, the second pixel driving circuit 22, the third pixel driving circuit 23 and the fourth pixel driving circuit 24, the brightness of the light-emitting device 31 in the embodiment of the present application can be increased to 4 times that of the conventional technology, that is, in high-brightness mode, the brightness of the display panel can reach 4000 nits.

[0094] Compared with conventional technologies, the embodiments of the present application can reduce the probability of display color deficiency and color deviation caused by abnormality of a single pixel driving circuit to 25%, thereby improving the yield rate of the display panel.

[0095] In some embodiments, the first scan signal line Pscan1 is the first scan signal line Pscan(n), and the second scan signal line Pscan2 is the second scan signal line Pscan(n-1), where n is a positive integer.

[0096] The embodiment of the present application also provides a display device, such as Fig. 9 As shown, Fig. 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application, wherein the display device 1000 includes a housing 200 and a display panel 100, and the display panel 100 is disposed on the housing 200. The display panel 100 may be a display panel provided in any of the above embodiments, and the display device 1000 may achieve the same technical effect as the display panel provided in any of the above embodiments, which will not be described in detail herein.

[0097] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, wherein the display panel includes a plurality of sub-pixel units, each sub-pixel unit includes a light-emitting device and at least two pixel driving circuits, the pixel driving circuit includes a switching transistor and a first light-emitting control transistor, and by compressing the length of the conductive part in the active layer so that the ratio of the length of the first conductive part in the conductive layer to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6, the area occupied by the pixel driving circuit can be reduced, so that each light-emitting device is connected to at least two pixel driving circuits in a corresponding sub-pixel unit, and when a single pixel driving circuit is abnormal, other pixel driving circuits connected to the light-emitting device can normally drive the light-emitting device to emit light, thereby reducing the risk of display color deficiency and color deviation caused by the abnormality of a single pixel driving circuit, thereby improving the yield rate of the display panel.

[0098] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0099] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0101] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: The invention comprises a plurality of sub-pixel units, each of which comprises a light-emitting device and at least two pixel driving circuits, wherein the pixel driving circuit comprises a switch transistor and a first light-emitting control transistor, wherein the switch transistor comprises a switch gate and a switch active part, wherein the switch gate is connected to a first scanning signal line, and the first light-emitting control transistor comprises a first light-emitting control active part; Among them, the display panel includes an active layer, the active layer includes a first conductor part, the first conductor part is connected between the switch active part and the first light-emitting control active part; the first scanning signal line is extended along a first direction, and the first conductor part is extended along a second direction Y, and the first direction is different from the second direction; along the second direction, the ratio of the length of the first conductor part to the length of the first light-emitting control active part is greater than or equal to 4 and less than or equal to 6; each of the light-emitting devices is electrically connected to at least two of the pixel driving circuits in a corresponding sub-pixel unit.

2. The display panel according to claim 1, wherein: The pixel driving circuit further includes a compensation transistor and a first reset transistor, the compensation transistor including a compensation active portion, and the first reset transistor including a first reset active portion; Wherein, along the second direction, a ratio of a distance between the compensation active portion and the first reset active portion to a length of the compensation active portion is greater than or equal to 3.5 and less than or equal to 5.

5.

3. The display panel according to claim 2, wherein: The active layer includes a second conductor portion connected between the compensation active portion and the first reset active portion, and the second conductor portion at least partially extends along a third direction, and the third direction forms an acute angle with the second direction.

4. The display panel according to claim 3, wherein: The active layer includes a third conductive portion, the third conductive portion is connected to an end of the switch active portion away from the first conductive portion, at least part of the third conductive portion extends along a fourth direction, and the fourth direction is arranged at an acute angle with the second direction.

5. The display panel according to claim 4, wherein: The third direction is arranged in parallel with the fourth direction.

6. The display panel according to claim 2, wherein: The pixel driving circuit includes a first pixel driving circuit and a second pixel driving circuit. The first pixel driving circuit and the second pixel driving circuit are arranged adjacent to each other along the second direction. The first pixel driving circuit and the second pixel driving circuit are connected to the anode of the same light-emitting device.

7. The display panel according to claim 6, wherein: The first light-emitting control transistor includes a first light-emitting control gate connected to a light-emitting control signal line; the first reset transistor includes a first reset gate connected to a second scanning signal line; Among them, the first scanning signal line corresponding to the first pixel driving circuit is connected in parallel with the first scanning signal line corresponding to the second pixel driving circuit, the second scanning signal line corresponding to the first pixel driving circuit is connected in parallel with the second scanning signal line corresponding to the second pixel driving circuit, and the light-emitting control signal line corresponding to the first pixel driving circuit is connected in parallel with the light-emitting control signal line corresponding to the second pixel driving circuit.

8. The display panel according to claim 6, wherein: The pixel driving circuit further includes a third pixel driving circuit and a fourth pixel driving circuit; Among them, the third pixel driving circuit and the fourth pixel driving circuit are arranged adjacent to each other along the second direction, the third pixel driving circuit and the first pixel driving circuit are arranged adjacent to each other along the first direction, the fourth pixel driving circuit and the second pixel driving circuit are arranged adjacent to each other along the first direction, and the first pixel driving circuit and the second pixel driving circuit, the third pixel driving circuit and the fourth pixel driving circuit are connected to the anode of the same light-emitting device.

9. The display panel according to claim 2, wherein: The pixel driving circuit comprises a driving transistor, a first electrode of the driving transistor is connected to a first node, a second electrode of the driving transistor is connected to a second node, and a driving gate of the driving transistor is connected to a third node; The first electrode of the switch transistor is connected to the data signal line, and the second electrode of the switch transistor is connected to the first node; The first electrode of the compensation transistor is connected to the third node, the second electrode of the compensation transistor is connected to the second node, and the compensation gate of the compensation transistor is connected to the first scanning signal line; A first electrode of the first light emission control transistor is connected to a first power signal line, and a second electrode of the first light emission control transistor is connected to the first node; A first electrode of the first reset transistor is connected to a first reset signal line, and a second electrode of the first reset transistor is connected to the third node.

10. The display panel according to any one of claims 1 to 9, characterized in that: In the same sub-pixel unit, the output currents of the plurality of pixel driving circuits connected to the same light-emitting device are the same.

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