Display panel, display device and pixel repair method

Abstract

The application belongs to the display field and relates to a display panel, a display device and a pixel repair method. The display panel comprises a pixel repair circuit, a pixel circuit, at least one pixel repair circuit arranged in each row of pixel circuits, a first repair line and a second repair line corresponding to the pixel repair circuit, the first repair line and the second repair line extending along a first direction respectively, the first repair line being connected with an anode of a light-emitting device, the second repair line being connected with the pixel repair circuit and the first repair line respectively, a driving voltage output by the pixel repair circuit being transmitted to the anode of the light-emitting device through the first repair line and the second repair line, and the sum of the distance from a target light-emitting device corresponding to a target pixel circuit to a target connection point and the distance from the target connection point to a target pixel repair circuit satisfying a preset condition. In the application, the repair line lengths between the pixel repair circuit and the light-emitting devices corresponding to the pixel circuits at different positions are the same, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a display device and a pixel repair method. BACKGROUND

[0002] With the development of display technology, organic light-emitting diode (OLED) is increasingly favored in the manufacturing of display panels. However, in the process of manufacturing and using OLED display panels, pixel circuits in the display panel may have defects. In this case, the pixel with defects may not be controlled by the scanning signal or the data signal to emit light normally, or the pixel with defects may always display black. This results in abnormal display of the display screen. SUMMARY

[0003] Embodiments of the present application provide a display panel, a display device and a pixel repair method, which can improve the display effect.

[0004] In a first aspect, embodiments of the present application provide a display panel, comprising:

[0005] a pixel repair circuit;

[0006] a pixel circuit, the pixel circuit being connected with an anode of a light-emitting device, and each row of pixel circuits being provided with at least one pixel repair circuit; wherein

[0007] the pixel repair circuit is configured with a first repair line and a second repair line, the first repair line and the second repair line respectively extending along a first direction, the first repair line being connected with the anode of the light-emitting device, the second repair line being connected with the pixel repair circuit and the first repair line respectively, and a driving voltage output by the pixel repair circuit being transmitted to the anode of the light-emitting device through the first repair line and the second repair line; wherein

[0008] a distance from a target light-emitting device corresponding to a target pixel circuit to a target connection point and a distance from the target connection point to a target pixel repair circuit satisfy a preset condition, the target connection point being a connection point between the first repair line and the second repair line, and the target pixel circuit being any one of a plurality of pixel circuits supported by the target pixel repair circuit for repair.

[0009] In a second aspect, embodiments of the present application further provide a display device, comprising the display panel provided in the first aspect.

[0010] In a second aspect, embodiments of the present application further provide a pixel repair method, applied to the display panel provided in the first aspect, and the method comprises:

[0011] Identify the target pixel circuit to be repaired;

[0012] Determining a corresponding target connection point and a target pixel repair circuit according to the target pixel circuit;

[0013] disconnecting the target pixel circuit from the corresponding target light-emitting device;

[0014] The target connection point is connected to the corresponding first repair line and second repair line respectively; wherein the first repair line is connected to the anode of the target light-emitting device, and the second repair line is connected to the target pixel repair circuit.

[0015] The display panel, display device and pixel repair method provided in the embodiments of the present application configure a first repair line and a second repair line for the pixel repair circuit. In the event of an abnormality in the pixel circuit, the first repair line is connected to the anode of the light-emitting device corresponding to the abnormal pixel circuit, and the first repair line and the second repair line are connected at the connection point corresponding to the abnormal pixel circuit, and the pixel repair circuit corresponding to the abnormal pixel circuit is connected through the second repair line, thereby forming a repair path between the anode of the light-emitting device corresponding to the abnormal pixel circuit and the pixel repair circuit, so that the pixel repair circuit replaces the abnormal pixel circuit to drive the light-emitting device to emit light, thereby ensuring normal display of the display panel. Since the sum of the distance from the target light-emitting device corresponding to the target pixel circuit to the target connection point and the distance from the target connection point to the target pixel repair circuit, that is, the repair line length meets the preset conditions, and the target pixel circuit is any one of the multiple pixel circuits supported for repair by the target pixel repair circuit, therefore, for the multiple pixel circuits supported for repair by the pixel repair circuit, the repair line length between the pixel repair circuit and the light-emitting device corresponding to the pixel circuit at any position is the same, so the repair line load between the pixel repair circuit and the light-emitting device corresponding to the pixel circuit at different positions is equivalent, which solves the problem of uneven display due to different repair line loads caused by different pixel circuit positions, and improves the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of a top view of a display panel provided in an embodiment of the present application;

[0018] Figure 2A schematic diagram of a top view of another display panel provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a top view of another display panel provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the layout structure of a display panel provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the layout structure of another display panel provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application;

[0023] Figure 7 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of the circuit structure of a display panel provided in an embodiment of the present application;

[0025] Figure 9 A schematic structural diagram of a pixel repair circuit provided in an embodiment of the present application;

[0026] Figure 10 A schematic structural diagram of a pixel circuit provided in an embodiment of the present application;

[0027] Figure 11 A schematic diagram of the circuit structure of another display panel provided in an embodiment of the present application;

[0028] Figure 12 A schematic diagram of the circuit structure of another display panel provided in an embodiment of the present application;

[0029] Figure 13 A schematic structural diagram of a display device provided in an embodiment of the present application;

[0030] Figure 14 A flowchart of a pixel repair method provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1-display panel, 10-16-pixel repair circuit, 20-26-pixel circuit, 30-36-light-emitting device, 40-46-connection point, 400-connector, 51-first repair line, 511-first main line, 512-first branch, 52-second repair line, 521-second main line, 522-second branch, 61-substrate, 62-first metal layer, 63-second metal layer, 64-third metal layer, 65-fourth metal layer, 110-sub-pixel circuit, 120-compensation circuit, 1000-display device. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, when a layer is referred to as being "under" another layer, it can be directly under or one or more intervening elements may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more intervening elements may also be present.

[0036] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0037] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this application.

[0038] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, and is not limited here.

[0039] Furthermore, in the specification, the phrase “planar distribution diagram” refers to a drawing when the target portion is viewed from above, and the phrase “cross-sectional diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0040] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0041] When a pixel circuit in a display panel fails or is abnormal, a pixel repair circuit can generally be used to replace the abnormal pixel circuit, and the light-emitting device corresponding to the abnormal pixel circuit is driven by the pixel repair circuit to ensure the display effect of the display screen. In this case, the pixel repair circuit is electrically connected to the light-emitting device corresponding to the abnormal pixel circuit. However, the pixel circuit with an abnormality can be a pixel circuit at any position in the display panel, so the position of the abnormal pixel circuit is not fixed, which results in the pixel repair circuit and the light-emitting device corresponding to the pixel circuit at different positions having different repair line loads (RC Loading). Therefore, the display screen repaired by the pixel repair circuit may have uneven brightness at the repair points, affecting the display effect.

[0042] In response to the above technical problems, the inventors have discovered that by configuring two repair lines for the pixel repair circuit and designing the repair lines between the pixel repair circuit and the light-emitting devices corresponding to each pixel circuit, the lengths of the repair lines between the pixel repair circuit and the light-emitting devices corresponding to pixel circuits at different positions are made equivalent. This solves the problem of uneven repair line lengths due to the non-fixed positions of abnormal pixel circuits, improves the phenomenon of uneven display brightness caused by uneven repair line lengths, and enhances the display effect. Based on this, the inventors further developed the technical solutions of the embodiments of the present application. Specifically, the display panel provided in the embodiments of the present application includes a pixel repair circuit and a pixel circuit. In which, the pixel circuit is connected to the anode of the light-emitting device, each row of pixel circuits is provided with at least one pixel repair circuit, the pixel repair circuit is configured with a first repair line and a second repair line, the first repair line and the second repair line extend along the first direction respectively, the first repair line is connected to the anode of the light-emitting device, and the second repair line is connected to the pixel repair circuit and the first repair line respectively, and the driving voltage output by the pixel repair circuit is transmitted to the anode of the light-emitting device through the first repair line and the second repair line, wherein the sum of the distance from the target light-emitting device corresponding to the target pixel circuit to the target connection point and the distance from the target connection point to the target pixel repair circuit meets the preset conditions.

[0043] By adopting the above-mentioned technical solution, the anode of the light-emitting device is connected through the first repair line, the pixel repair circuit is connected through the second repair line, and the first repair line and the second repair line are connected through the connection points corresponding to each light-emitting device. In the case of an abnormal pixel circuit, the abnormal pixel circuit is replaced by the pixel repair circuit to drive the light-emitting device to emit light, thereby ensuring the normal display of the display panel. In addition, the repair line length between the pixel repair circuit and the light-emitting device corresponding to the pixel circuit it supports repair is the same. Therefore, the problem of uneven display that is prone to occur in the scenario where the pixel repair circuit repairs the pixel circuit can be improved, thereby improving the display effect.

[0044] The above is the core concept of this application. The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0045] Figure 1 This is a schematic diagram of a top view of a display panel provided in an embodiment of the present application. Figure 2 This is a schematic diagram of a top view of another display panel provided in an embodiment of the present application. Figure 3 This is a schematic diagram of a top view of another display panel provided in an embodiment of the present application. Figures 1 to 3 As shown, the display panel 1 provided in the embodiment of the present application includes a pixel repair circuit 10 and a pixel circuit 20.

[0046] The pixel circuit 20 is connected to the anode of the light emitting device 30. The pixel circuit 20 is used to drive the light emitting device 30 to emit light under normal circumstances. Each row of pixel circuits 20 is provided with at least one pixel repair circuit 10. Each row of pixel circuits 20 can be provided with one pixel repair circuit 10, or each row of pixel circuits 20 can be provided with two pixel repair circuits 10. Figures 1 to 3 As shown, the pixel circuits 20 in the display panel 1 can be arranged in an array. Specifically, each row of pixel circuits 20 is distributed along the X-axis, and each column of pixel circuits 20 is distributed along the Y-axis. The embodiment of the present application does not limit the number, position, and pixel circuits 20 that support repair of the pixel repair circuit 10. For example, Figure 1 and Figure 2 As shown, each row of pixel circuits 20 may be provided with a corresponding pixel repair circuit 10, and the pixel repair circuit 10 may be located on the left or right side of the pixel circuits 20 of the corresponding row. Each pixel repair circuit 10 supports repairing each pixel circuit 20 of the corresponding row, wherein: Figure 1 Each pixel repair circuit 10 is located on the right side of the pixel circuit 20 in the corresponding row. Figure 2 Part of the pixel repair circuit 10 is located on the left side of the pixel circuit 20 of the corresponding row, and the remaining part of the pixel repair circuit 10 is located on the right side of the pixel circuit 20 of the corresponding row. Figure 3 As shown, each row of pixel circuits 20 can be correspondingly provided with two pixel repair circuits 10, and the pixel repair circuits 10 can be located on the left and right sides of the pixel circuits 20 of the corresponding row, wherein the left pixel repair circuit 10 supports repairing each pixel circuit 20 in the left half area of ​​the corresponding row, and the right pixel repair circuit 10 supports repairing each pixel circuit 20 in the right half area of ​​the corresponding row. Figures 1 to 3 This is only an example description. In applications, the number, position and supported pixel circuits 20 of the pixel repair circuits 10 can be arbitrarily set according to needs and are not limited here.

[0047] The pixel repair circuit 10 is configured with a first repair line 51 and a second repair line 52, that is, each pixel repair circuit 10 is configured with a set of repair lines. Figure 1 and Figure 2 As shown, each row of pixel circuits 20 is provided with a pixel repair circuit 10, and each row of pixel circuits 20 corresponds to a group of repair lines. Figure 3 As shown, each row of pixel circuits 20 is provided with two pixel repair circuits 10, and each row of pixel circuits 20 corresponds to two groups of repair lines, and the two groups of repair lines are not connected to each other. The first repair line 51 and the second repair line 52 extend along the first direction respectively, and the first repair line 51 and the second repair line 52 are arranged parallel to each other along the first direction. Figures 1 to 3In the illustrated embodiment, the first direction is the row direction of the pixel circuit 20, i.e., the X-axis direction, and the column direction of the pixel circuit 20 is the Y-axis direction. The first repair line 51 and the second repair line 52 are made of conductive materials, including but not limited to metallic conductive materials such as copper and aluminum, which are not limited herein. The first repair line 51 and the second repair line 52 are intended to provide support for forming an electrical connection between the pixel repair circuit 10 and the light-emitting element.

[0048] The first repair line 51 is connected to the anode of the light-emitting device 30. The second repair line 52 is connected to the pixel repair circuit 10 and the first repair line 51, respectively. The driving voltage output by the pixel repair circuit 10 is used to be transmitted to the anode of the light-emitting device 30 through the first repair line 51 and the second repair line 52. In other words, the pixel repair circuit 10 is used to drive the light-emitting device 30 corresponding to the abnormal pixel circuit 20 to emit light when the pixel circuit 20 is abnormal.

[0049] The sum of the distance from the target light emitting device to the target connection point and the distance from the target connection point to the target pixel repair circuit corresponding to the target pixel circuit meets the preset conditions. Wherein, the target pixel circuit is any one of the multiple pixel circuits 20 that the target pixel repair circuit supports repairing. Figure 1 and Figure 2 As shown, the pixel repair circuit 10 of each row supports repairing each pixel circuit 20 of the corresponding row; Figure 3 As shown, the pixel repair circuit 10 on the left side of each row supports the repair of each pixel circuit 20 corresponding to the left half row, and the pixel circuit 20 on the right side of each row supports the repair of each pixel circuit 20 corresponding to the right half row. The target connection point is the connection point 40 between the first repair line 51 and the second repair line 52. The target connection point is used to connect the first repair line 51 and the second repair line 52, and the target connection point is located between the first repair line 51 and the second repair line 52. The target connection point corresponds to the target pixel circuit. The connection points 40 corresponding to different pixel circuits 20 are different, and the connection points 40 corresponding to pixel circuits 20 at different positions are at different positions. The preset condition is a pre-set fixed value, which can be set accordingly according to the specific structure of the display panel 1. The sum of the distances represents the length of the repair line between the target pixel repair circuit and the target light-emitting device, and the repair line length can be understood as the physical routing length. That is, for any abnormal pixel circuit 20 in the display panel 1, the sum of the distance between the light-emitting device 30 corresponding to the abnormal pixel circuit 20 and the connection point 40 and the distance between the connection point 40 and the pixel repair circuit 10 is a preset fixed value. In short, the length of the repair line corresponding to each pixel circuit 20 is equal.

[0050] In application, for multiple pixel circuits 20 in each row of pixel circuits 20, when there is an abnormality in the pixel circuit 20, the path between the abnormal pixel circuit 20 and the anode of the corresponding light-emitting device 30 can be disconnected, and the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 can be electrically connected to the first repair line 51, and the first repair line 51 and the second repair line 52 are electrically connected at the connection point 40 corresponding to the abnormal pixel circuit 20, and the second repair line 52 and the corresponding pixel repair circuit 10 are electrically connected, so that the pixel repair circuit 10 is electrically connected to the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 through the first repair line 51 and the second repair line 52, thereby driving the light-emitting device 30 to emit light by replacing the abnormal pixel circuit 20 with the pixel repair circuit 10, thereby ensuring the normal display of the display panel 1.

[0051] In summary, the display panel 1 provided in the embodiment of the present application configures a first repair line 51 and a second repair line 52 for the pixel repair circuit 10. When the pixel circuit 20 is abnormal, the first repair line 51 is connected to the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20, and the first repair line 51 and the second repair line 52 are connected at the connection point 40 corresponding to the abnormal pixel circuit 20, and the pixel repair circuit 10 corresponding to the abnormal pixel circuit 20 is connected through the second repair line 52, thereby forming a repair path between the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 and the pixel repair circuit 10, so that the pixel repair circuit 10 replaces the abnormal pixel circuit 20 to drive the light-emitting device 30 to emit light, thereby ensuring the normal display of the display panel 1. Among them, since the sum of the distance from the target light-emitting device corresponding to the target pixel circuit to the target connection point and the distance from the target connection point to the target pixel repair circuit meets the preset conditions, and the target pixel circuit is any one of the multiple pixel circuits 20 supported by the target pixel repair circuit, therefore, for the multiple pixel circuits 20 supported by the pixel repair circuit 10, the repair line length between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at any position is the same, so the repair line load (RC Loading) between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the abnormal pixel circuit 20 at different positions is equivalent, thereby solving the problem of uneven display caused by different repair line loads due to different positions of the abnormal pixel circuit 20, thereby improving the display effect. Among them, the repair line load includes at least one of the repair line equivalent resistance and the repair line equivalent capacitance.

[0052] Please continue reading Figures 1 to 3In one embodiment, the distance between the target connection point and the target pixel repair circuit is negatively correlated with the distance between the target pixel circuit and the target pixel repair circuit. The target pixel circuit is any one of the multiple pixel circuits 20 that the target pixel repair circuit supports repairing. The target pixel circuit drives the target light-emitting device to emit light under normal circumstances, and the target pixel repair circuit drives the target light-emitting device to emit light when the target pixel circuit is abnormal. The target connection point refers to the point connecting the first repair line 51 and the second repair line 52 on the repair route corresponding to the target pixel circuit. The greater the distance between the target pixel circuit and the target pixel repair circuit, the smaller the distance between the target connection point and the target pixel circuit; the smaller the distance between the target pixel circuit and the target pixel repair circuit, the greater the distance between the target connection point and the target pixel circuit.

[0053] The distance between the target connection point and the target pixel repair circuit is positively correlated with the width of each row of pixel circuits 20 along the first direction. The width of each row of pixel circuits 20 along the first direction refers to the distance between the pixel circuits 20 at both ends of each row of pixel circuits 20 along the first direction, or in other words, the width of each row of pixel circuits 20 along the first direction refers to the distance between the first column of pixel circuits 20 and the last column of pixel circuits 20 in the first direction. Figures 1 to 3 As shown, the width of each row of pixel circuits 20 along the first direction is L. The greater the width of each row of pixel circuits 20 along the first direction, the greater the distance between the target connection point and the target pixel repair circuit; and the smaller the width of each row of pixel circuits 20 along the first direction, the smaller the distance between the target connection point and the target pixel repair circuit.

[0054] For each pixel repair circuit 10 that supports repairing multiple pixel circuits 20, the positions of each pixel circuit 20 on the display panel 1 are different, and the distances between each pixel circuit 20 and the pixel repair circuit 10 are different. Therefore, when using the pixel repair circuit 10 to repair the pixel circuit 20 at any position, on the basis of configuring the first repair line 51 and the second repair line 52, by adjusting the position of the connection point 40 between the first repair line 51 and the second repair line 52, the repair route length between the pixel repair circuit 10 and the anode of the light-emitting device 30 corresponding to each pixel circuit 20 is made the same, thereby balancing the repair line load between the pixel repair circuit 10 and each light-emitting device 30, solving the problem of uneven repair line load caused by different positions of the pixel circuits 20, improving the phenomenon of uneven display caused by uneven repair line load, and improving the display effect.

[0055] Please continue reading Figure 1 and Figure 2 In one embodiment, each row of pixel circuits 20 is provided with a pixel repair circuit 10, and the pixel repair circuit 10 is located on one side of each row of pixel circuits 20 in the first direction. Figure 1 and Figure 2 As shown, the pixel repair circuit 10 is located on the right side of each row of pixel circuits 20 in the X-axis direction, and each pixel repair circuit 10 supports the repair of each pixel circuit 20 in the same row. The distance between the target connection point and the target pixel repair circuit is (LX) / 2. L represents the width of each row of pixel circuits 20 in the first direction, and L is a fixed value. Generally, the width of each row of pixel circuits 20 in the first direction is the same. X represents the distance between the target pixel circuit and the target pixel repair circuit. For each pixel repair circuit 10 that supports repairing multiple pixel circuits 20 in the same row, the distance X between each pixel circuit 20 and the pixel repair circuit 10 is different. Accordingly, the connection point 40 between the first repair line 51 and the second repair line 52 corresponding to each pixel circuit 20 is at a different position.

[0056] by Figure 1 For example, the structure shown in the figure is taken as an example. For example, the pixel circuit 21 is abnormal, the distance between the pixel circuit 21 and the pixel repair circuit 11 is L+L0, the distance between the light-emitting device 31 corresponding to the pixel circuit 21 and its connection point 41 is 0, and the distance between the connection point 41 and the pixel repair circuit 11 is L+L0. Then the length of the repair route between the light-emitting device 31 and the pixel repair circuit 11 is 0+L+L0=L+L0; for another example, the pixel circuit 22 is abnormal, the distance between the pixel circuit 22 and the pixel repair circuit 12 is L / 2+L0, the distance between the light-emitting device 32 corresponding to the pixel circuit 22 and its connection point 42 is L / 4, and the distance between the connection point 41 and the pixel repair circuit 11 is L / L0. For example, if the distance between pixel circuit 23 and pixel repair circuit 13 is L / 4+L0, the distance between pixel circuit 23 and pixel repair circuit 13 is L / 4+L0. The distance between the light-emitting device 33 corresponding to pixel circuit 23 and its connection point 43 is 3L / 8, and the distance between connection point 43 and pixel repair circuit 13 is 5L / 8+L0. The length of the repair route between light-emitting device 33 and pixel repair circuit 13 is 3L / 8+5L / 8+L0=L+L0. Therefore, the length of the repair route between the pixel repair circuit and each corresponding light-emitting device is L+L0.

[0057] The display panel 1 provided by the above embodiment supports repair of multiple pixel circuits 20 in the same row for each pixel repair circuit 10. When a pixel circuit 20 at any position is abnormal, the pixel repair circuit 10 is connected to the light-emitting device 30 corresponding to the abnormal pixel circuit 20 through the first repair line 51, the second repair line 52 and the connection point 40 corresponding to the abnormal pixel circuit 20, so that the repair route length between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at different positions is L+L0. Therefore, the repair line load between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at different positions is the same, which solves the problem of unbalanced repair line load caused by different positions of the pixel circuit 20, thereby improving the display effect.

[0058] Please continue reading Figure 3 In one embodiment, each row of pixel circuits 20 is provided with two pixel repair circuits 10, and each pixel repair circuit 10 is located on both sides of each row of pixel circuits 20 in the first direction. Figure 3 As shown, for each row of pixel circuits 20, two pixel repair circuits 10 are respectively located on the left and right sides of the same row of pixel circuits 20 in the X-axis direction, wherein the left pixel repair circuit 10 supports repairing the pixel circuits 20 of the left half row, and the right pixel repair circuit 10 supports repairing the pixel circuits 20 of the right half row. The distance between the target connection point and the target pixel repair circuit is (L / 2-X) / 2. L represents the width of each row of pixel circuits 20 along the first direction, and L is a fixed value. Generally, the width of each row of pixel circuits 20 in the first direction is the same. X represents the distance between the target pixel circuit and the target pixel repair circuit. For each half row of multiple pixel circuits 20 supported by each pixel repair circuit 10, the distance X between each pixel circuit 20 and the pixel repair circuit 10 is different, and accordingly, the connection point 40 between the first repair line 51 and the second repair line 52 corresponding to each pixel circuit 20 is at a different position.

[0059] by Figure 3Taking the structure shown as an example, for example, pixel circuit 24 is abnormal, the distance between pixel circuit 24 and pixel repair circuit 14 is L / 2+L0, the distance between the light-emitting device 34 corresponding to pixel circuit 24 and its connection point 44 is 0, and the distance between the connection point 44 and pixel repair circuit 14 is L / 2+L0, then the length of the repair route between the light-emitting device 34 and the pixel repair circuit 14 is 0+L / 2+L0=L / 2+L0; for another example, pixel circuit 25 is abnormal, the distance between pixel circuit 25 and pixel repair circuit 15 is L0, the distance between the light-emitting device 35 corresponding to pixel circuit 25 and its connection point 45 is L / 4, and the distance between the connection point 44 and the pixel repair circuit 14 is L / 2+L0. The distance between the contact 42 and the pixel repair circuit 12 is L / 4+L0, so the length of the repair route between the light-emitting device 32 and the pixel repair circuit 12 is L / 4+L / 4+L0=L / 2+L0. For another example, if pixel circuit 26 is abnormal, the distance between pixel circuit 26 and pixel repair circuit 16 is L / 4+L0, the distance between the light-emitting device 36 corresponding to pixel circuit 26 and its connection point 46 is L / 8, and the distance between the connection point 46 and the pixel repair circuit 16 is 3L / 8+L0. Therefore, the length of the repair route between the light-emitting device 36 and the pixel repair circuit 16 is L / 8+3L / 8+L0=L / 2+L0. Therefore, the length of the repair route between the pixel repair circuit and its corresponding light-emitting devices is L / 2+L0.

[0060] The display panel 1 provided by the above embodiment supports repair of multiple pixel circuits 20 in the same row for each pixel repair circuit 10. When a pixel circuit 20 at any position is abnormal, the pixel repair circuit 10 is connected to the light-emitting device 30 corresponding to the abnormal pixel circuit 20 through the first repair line 51, the second repair line 52 and the connection point 40 corresponding to the abnormal pixel circuit 20, so that the repair route length between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at different positions is L / 2+L0. Therefore, the repair line load between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at different positions is the same, which solves the problem of unbalanced repair line load caused by different positions of the pixel circuit 20, thereby improving the display effect.

[0061] Based on the above Figures 1 to 3 It can be seen from the illustrated embodiment that the length of the repair line between the pixel repair circuit 10 and the multiple light-emitting devices 30 is a fixed value, and the fixed value of the repair line length can be set accordingly according to the specific structure of the display panel 1, and the position of the connection point 40 between the first repair line 51 and the second repair line 52 is set accordingly according to the position of the pixel circuit 20.

[0062] Figure 4 A schematic diagram of the layout structure of a display panel 1 provided in an embodiment of the present application is shown in FIG. Figure 5A schematic diagram of the layout structure of a display panel 1 provided in an embodiment of the present application. Figures 1 to 5 As shown, in one embodiment, the first repair line 51 includes a first main line 511 and at least one first branch 512, and the first branch 512 is connected to the first main line 511. The second repair line 52 includes a second main line 521 and at least one second branch 522, and the second branch 522 is connected to the second main line 521. The first repair line 51 and the second repair line 52 are respectively convex structures, wherein the first branch 512 is the protruding portion of the first repair line 51 in the direction of the pixel circuit 20 column, and the second branch 522 is the protruding portion of the second repair line 52 in the direction of the pixel circuit 20 column. The number of first branches 512 and second branches 522 is related to the number of pixel circuits 20 that the pixel repair circuit 10 supports repairing.

[0063] Exemplarily, the number of the first branches 512 and the second branches 522 is greater than or equal to the number of the pixel circuits 20 that the pixel repair circuit 10 supports repairing. Figure 1 The display panel 1 shown adopts Figure 4 In the structure shown, each row of M pixel circuits 20 corresponds to one pixel repair circuit 10, that is, when one pixel repair circuit 10 supports repairing M pixel circuits 20 in one row, the first repair line 51 includes a first main line 511 and M first branches 512, and the second repair line 52 includes a second main line 521 and M second branches 522. For another example, Figure 1 The structure shown adopts Figure 5 In the structure shown, each row of M pixel circuits 20 corresponds to one pixel repair circuit 10, that is, when one pixel repair circuit 10 supports repairing M pixel circuits 20 in one row, the first repair line 51 includes a first main line 511 and 2M first branches 512, and the second repair line 52 includes a second main line 521 and 2M second branches 522. For another example, Figure 3 The display panel 1 shown adopts Figure 4 In the described structure, each half row of M pixel circuits 20 corresponds to a pixel repair circuit 10, that is, when one pixel repair circuit 10 supports repairing M / 2 pixel circuits 20 in a half row, the first repair line 51 includes a first main line 511 and at least M / 2 first branches 512, and the second repair line 52 includes a second main line 521 and at least M / 2 second branches 522.

[0064] The first branch 512 and the second branch 522 are correspondingly arranged in the second direction. The second direction intersects with the first direction. Exemplarily, the second direction is the column direction of the pixel circuit 20. At least one first branch 512 is arranged corresponding to the light-emitting device 30. The first repair line 51 is arranged near the anode of the light-emitting device 30. Exemplarily, the projection of the first repair line 51 in the third direction at least partially overlaps with the projection of the anode of the light-emitting device 30 in the third direction. The third direction is perpendicular to the X-axis and the Y-axis, respectively. The first branch 512 is arranged near one side of the second repair line 52, and the second branch 522 is arranged near one side of the first repair line 51.

[0065] The first branch 512 and the second branch 522 corresponding to the target light-emitting device are connected through a connector 400. The connector 400 is located at the target connection point. It should be noted that the connection point 40 is a virtual concept proposed in the embodiment of the present application, and the connector 400 is the actual physical structure of the connection point 40. The connector 400 is intended to electrically connect the first repair line 51 and the second repair line 52. The material of the connector 400 is a conductive material, including but not limited to metal conductive materials such as copper, aluminum, etc., which are not limited here. In application, when there is an abnormality in the pixel circuit 20 of the display panel 1, a connector 400 can be formed at the target connection point position, and the first repair line 51 and the second repair line 52 are connected through the connector 400, so that the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 is connected to the pixel repair circuit 10 through the first repair line 51 and the second repair line 52, so that the light-emitting device 30 is driven to emit light through the pixel repair circuit 10, thereby repairing the pixel circuit 20. It can also ensure the load balancing between the pixel repair circuit 10 and each pixel circuit 20, thereby improving the display effect.

[0066] Figure 6 This is a schematic diagram of a cross-sectional structure of a display panel 1 provided in an embodiment of the present application. Figures 1 to 6 In one embodiment, the first repair line 51 and the second repair line 52 are provided on the same layer. Thus, the first repair line 51 and the second repair line 52 can be provided on the same film layer, making full use of the planar space of the display panel 1 without adding an additional film layer, thereby reducing costs.

[0067] Please continue reading Figures 1 to 4In one embodiment, when the first repair line 51 and the second repair line 52 are provided in the same layer, the connector 400 may include a conductive layer, a first conductive plug, and a second conductive plug. The conductive layer is provided in a different layer from the first repair line 51, connected to the first repair line 51 via the first conductive plug, and connected to the second repair line 52 via the second conductive plug. For example, the projection of the conductive layer in the third direction at least partially overlaps with the projection of the corresponding first branch 512 in the third direction, and the projection of the conductive layer in the third direction at least partially overlaps with the projection of the corresponding second branch 522 in the third direction. In application, a conductive layer may be pre-placed at each connection point 40. In the event of an abnormality in the pixel circuit 20, the first conductive plug and the second conductive plug are respectively prepared at the target connection point of the abnormal pixel circuit 20 to form the connector 400. The first repair line 51 and the second repair line 52 are then connected at the target connection point via the connector 400. Furthermore, the pixel circuit 20 is repaired by connecting the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 to the pixel repair circuit 10. The embodiment of the present application does not limit the method for preparing the conductive plug. For example, laser sintering or other methods may be used.

[0068] Please continue reading Figures 1 to 4 as well as Figure 6 In one embodiment, the display panel 1 includes a substrate 61 and a first metal layer 62, a second metal layer 63, and a third metal layer 64 that are sequentially spaced away from the substrate 61. Exemplarily, the first metal layer 62 may be an M1 layer, the second metal layer 63 may be an MC layer, and the third metal layer 64 may be an M2 layer. The first repair line 51 and the second repair line 52 are respectively located in the second metal layer 63, and the conductive layer and the anode of the light-emitting device 30 are respectively located in the third metal layer 64. That is, the second metal layer 63 can be reused, and the first repair line 51 and the second repair line 52 are respectively arranged in the second metal layer 63, without the need for additional film layers, thereby reducing costs. Based on this, exemplarily, at least one signal line can be arranged in the third metal layer 64, that is, the first repair line 51 and the second repair line 52 are respectively arranged with the signal line to avoid interference between the first repair line 51 and the second repair line 52 and the signal line, thereby ensuring normal display of the display panel 1. The signal line is connected to the pixel circuit 20 , and is used to provide the pixel circuit 20 with at least one of a data signal, a power signal, and a control signal.

[0069] Figure 7 This is a schematic diagram of a cross-sectional structure of a display panel 1 provided in an embodiment of the present application. Figures 1 to 4 as well as Figure 7As shown, in one embodiment, the display panel 1 comprises a substrate 61 and a first metal layer 62, a second metal layer 63, a third metal layer 64 and a fourth metal layer 65 successively away from the substrate 61. For example, the first metal layer 62 can be an M1 layer, the second metal layer 63 can be an MC layer, the third metal layer 64 can be an M2 layer, and the fourth metal layer 65 can be an M3 layer.

[0070] The first repair line 51, the second repair line 52 and the anode of the light-emitting device 30 are respectively located in the third metal layer 64, and the conductive layer is located in the third metal layer 64. That is, the third metal layer 64 can be reused, and the first repair line 51 and the second repair line 52 can be respectively arranged in the third metal layer 64, without the need to additionally add a film layer, thereby reducing the cost. Based on this, for example, at least one signal line can be arranged in the third metal layer 64, and the signal line can be arranged in the fourth metal layer 65, that is, the first repair line 51 and the second repair line 52 are respectively arranged abnormally with the signal line, thereby avoiding interference between the first repair line 51 and the second repair line 52 and the signal line, and ensuring normal display of the display panel 1. In addition, since the resistance of the third metal layer 64 is smaller than that of the second metal layer 63, in the display panel 1 comprising the fourth metal layer 65, the first repair line 51 and the second repair line 52 are respectively arranged in the third metal layer 64, which can reduce the line load between the pixel repair circuit 10 and the light-emitting device 30, and further improve the display effect.

[0071] Please continue to refer to Figure 7 In one embodiment, the first repair line 51 and the second repair line 52 are arranged in different layers. In this way, the interference between the first repair line 51 and the second repair line 52 can be reduced, and the vertical space of the display panel 1 can be fully utilized, thereby saving the planar space of the display panel 1 and reducing the area occupied by the repair line on the display panel 1.

[0072] Please continue to refer to Figures 1 to 3 and Figure 5 In one embodiment, in the case where the first repair line 51 and the second repair line 52 are arranged in different layers, the connecting piece 400 can comprise a third conductive plug. The third conductive plug is respectively connected with the first repair line 51 and the second repair line 52. Since the first repair line 51 and the second repair line 52 are arranged in different layers, the projection of the first repair line 51 in the third direction and the projection of the second repair line 52 in the third direction can at least partially overlap, based on which the third conductive plug can be used to respectively connect the first repair line 51 and the second repair line 52. In application, in the case where the pixel circuit 20 is abnormal, the third conductive plug can be formed at the position of the connecting point 40 corresponding to the abnormal pixel circuit 20, and the first repair line 51 and the second repair line 52 are electrically connected through the third conductive plug, so as to connect the pixel repair circuit 10 with the anode of the light-emitting device 30, thereby repairing the pixel circuit 20 through the pixel repair circuit 10.

[0073] Please continue reading Figures 1 to 3 、 Figure 5 and Figure 7 In one embodiment, the display panel 1 includes a substrate 61 and a first metal layer 62, a second metal layer 63, a third metal layer 64, and a fourth metal layer 65, which are sequentially spaced away from the substrate 61. The first repair line 51 is located in the second metal layer 63, and the second repair line 52 and the anode of the light-emitting device 30 are located in the third metal layer M3. Because the third metal layer 64 has a lower resistance than the second metal layer 63, in the display panel 1 including the fourth metal layer 65, the first repair line 51 is provided in the second metal layer 63 and the second repair line 52 is provided in the third metal layer 64. This can reduce the line load between the pixel repair circuit 10 and the light-emitting device 30, thereby further improving the display effect. Based on this, illustratively, at least one signal line is located in the fourth metal layer, and the signal line is connected to the pixel circuit 20. That is, the first repair line 51 and the second repair line 52 are respectively arranged abnormally with the signal line to avoid interference between the first repair line 51 and the second repair line 52 and the signal line, thereby ensuring normal display of the display panel 1.

[0074] Please continue reading Figure 6 and Figure 7 In one embodiment, the orthographic projection of the connector 400 toward the substrate 61 does not overlap with the orthographic projection of the first metal layer toward the substrate 61. In application, the second repair line 52 can be connected to the pixel repair circuit 10. In the case that an abnormal pixel circuit 20 appears in the display panel 1, it is necessary to prepare a connector 400 at the connection point 40 to connect the first repair line 51 and the second repair line 52, and it is necessary to connect the first repair line 51 and the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 at the connection point 40. Generally, the connector 400 is prepared along the direction of the substrate 61 toward the first metal layer, that is, the positive direction of the Z axis, to connect the anode of the light-emitting device 30 corresponding to the abnormal pixel circuit 20 and the pixel repair circuit 10. The orthographic projection of the connector 400 toward the substrate 61 does not overlap with the orthographic projection of the first metal layer toward the substrate 61, indicating that in the direction of the substrate 61 toward the first metal layer, there is no metal layer blocking the connector 400, thereby reducing the impact on the first metal layer during the preparation of the connector 400, thereby ensuring the normal function of the display panel 1.

[0075] Please continue reading Figure 4 and Figure 5 In one embodiment, the shape of each conductive plug (including the first conductive plug, the second conductive plug and the third conductive plug) can be any suitable shape, for example, it can be cylindrical, it can be a rectangular parallelepiped, or it can be other irregular shapes. This application does not impose too many restrictions.

[0076] Please continue reading Figure 5 In one embodiment, the size of each conductive plug (including the first conductive plug, the second conductive plug and the third conductive plug) in one direction is greater than or equal to the sum of the minimum metal line width and the minimum overlap width. The size of each conductive plug in another direction is greater than or equal to the minimum overlap width. One direction intersects with another direction, and these two directions are respectively perpendicular to the film layer distribution direction of the display panel 1, that is, the Z-axis direction. The minimum metal line width and the minimum overlap width are respectively related to the preparation process of the display panel. Specifically, the minimum metal line width is the width that ensures that the wiring resistance is less than the maximum resistance required by the circuit. The minimum overlap width is the sum of the mask process alignment requirement width and the process loss width difference (CD Loss). The process loss width difference is the difference between the target width and the process implementation width.

[0077] For example, Figure 5 As shown, a dimension E1 of the third conductive plug in the X-axis direction is greater than or equal to 3.9 μm, and can be, for example, 3.9 μm, 4.0 μm, 4.5 μm, 6 μm, or 10 μm, or any other value greater than or equal to 3.9 μm, without limitation herein. A dimension E2 of the third conductive plug in the Y-axis direction is greater than or equal to 1.6 μm, and can be, for example, 1.6 μm, 2.0 μm, 2.5 μm, 4.0 μm, 5 μm, 8.5 μm, or 10 μm, or any other value greater than or equal to 1.6 μm, without limitation herein. In this way, by designing the size of the conductive plug in the connector 400, it is ensured that the first conductive plug can effectively connect the first repair line 51 and the conductive layer, the second conductive plug can effectively connect the second repair line 52 and the conductive layer, and the third conductive plug can effectively connect the first repair line 51 and the second repair line 52, thereby ensuring the effectiveness and reliability of the circuit connection between the first repair line 51 and the second repair line 52, so that the pixel repair circuit 10 can effectively repair the abnormal pixel circuit 20 in the display panel 1.

[0078] Figure 8 This is a schematic diagram of the circuit structure of a display panel 1 provided in an embodiment of the present application. Figure 9 This is a structural diagram of a pixel repair circuit 10 provided in an embodiment of the present application. Figure 10 This is a structural diagram of a pixel circuit 20 provided in an embodiment of the present application. Figure 11 This is a schematic diagram of the circuit structure of another display panel 1 provided in an embodiment of the present application. Figure 12 This is a schematic diagram of the circuit structure of another display panel 1 provided in an embodiment of the present application. Figures 1 to 12 As shown, in one embodiment, the pixel repair circuit 10 includes a sub-pixel circuit 110 and a compensation circuit 120. Figures 9 to 12As shown, the sub-pixel circuit 110 of the pixel repair circuit 10 is identical to the pixel circuit 20 that the pixel repair circuit 10 supports repairing. The input terminal of the compensation circuit 120 is used to receive the compensation signal PVDD*, and the output terminal of the compensation circuit 120 is connected to the output terminal of the first light-emitting control transistor M4 of the sub-pixel circuit 110. The compensation signal PVDD* is pre-set and can be set accordingly based on the load of the repair line between the pixel repair circuit 10 and the light-emitting device 30.

[0079] In the event of an abnormality in the target pixel circuit, the target pixel circuit is connected to the target light-emitting device. Specifically, the output terminal of the first light-emitting control transistor M4 in the target pixel circuit is also connected to the anode of the target light-emitting device, with the corresponding connection node being A1. The target pixel circuit drives the target light-emitting device to emit light.

[0080] In the event of an abnormality in the target pixel circuit, the target pixel repair circuit corresponding to the target pixel circuit is connected to the target light-emitting device. Specifically, the output end of the compensation circuit 120 in the target pixel repair circuit and the output end of the first light-emitting control transistor M4 of the sub-pixel circuit 110 are respectively connected to the anode of the target light-emitting device, and the corresponding connection node is A2. The sub-pixel circuit 110 and the compensation circuit 120 in the target pixel repair circuit jointly drive the target light-emitting device to emit light. The specific connection method between the target pixel repair circuit and the target light-emitting device can be found in the relevant description of the aforementioned embodiment and will not be repeated here.

[0081] The target pixel circuit is any one of the multiple pixel circuits 20 that the target pixel repair circuit supports repairing. The compensation circuit 120 is intended to compensate for the effect of the repair circuit load between the target pixel repair circuit and the target light-emitting device on the light emission of the target light-emitting device. Exemplarily, the drive current driven by the target pixel circuit to drive the target light-emitting device is the same as the drive current driven by the sub-pixel circuit 110 and the compensation circuit 120 in the target pixel repair circuit. Since the repair circuit load between the target pixel repair circuit and the target light-emitting device is equivalent to a resistor R, the repair circuit load affects the brightness of the light-emitting device 30. Therefore, the pixel repair circuit 10 provided in the embodiment of the present application, while providing a sub-pixel circuit 110 having the same structure as the target pixel circuit, is supplemented with a compensation circuit 120 to compensate for the effect of the repair circuit load on the brightness of the target light-emitting device. The sub-pixel circuit 110 and the compensation circuit 120 jointly drive the target light-emitting device to emit light, so that the brightness of the target light-emitting device driven by the pixel repair circuit 10 instead of the target pixel circuit is the same as the brightness of the target light-emitting device driven by the target pixel circuit. This solves the problem of brightness reduction caused by the repair circuit load and further improves the display effect.

[0082] Please continue reading Figures 1 to 8In one embodiment, the voltage of the compensation signal PVDD* received by the compensation circuit 120 is positively correlated with the repair line load. The repair line load is positively correlated with the repair line length. The repair line length is the sum of the distance between the target pixel circuit and the target connection point, and the distance between the target connection point and the target pixel repair circuit. In other words, it is the physical length of the wiring electrically connecting the target light-emitting device and the pixel repair circuit 10.

[0083] Based on the foregoing, it can be seen that in the display panel 1 provided in the embodiment of the present application, the length of the repair line between the pixel repair circuit 10 and the light-emitting devices 30 corresponding to different pixel circuits 20 is the same. Therefore, the load of the repair line between the pixel repair circuit 10 and the light-emitting devices 30 corresponding to different pixel circuits 20 is the same. Therefore, the load of the repair line can be equivalent to a fixed resistor R, and the load of the repair line will have a voltage division effect. According to the driving current formula of the pixel circuit 20: Id=k(Vsg-|Vth|)2=k(PVDD-Vdata-|Vth|) 2 It can be seen that the repair circuit load will reduce the anode voltage of the target light-emitting device. Based on this, the pixel repair circuit 10 provided in the embodiment of the present application can set the voltage value of the compensation signal PVDD* received by the compensation circuit 120 according to the repair circuit load. The voltage value of the compensation signal PVDD* of each pixel repair circuit 10 in the display panel 1 is the same, so that the compensation signal PVDD* can compensate for the voltage drop effect of the repair circuit load on the light-emitting device 30. Wherein, Id represents the drive current, PVDD represents the first power supply signal in the high-level state in the pixel circuit 20, Vdata represents the data write signal, and |Vth| represents the threshold voltage of the drive transistor M0 in the pixel circuit 20.

[0084] Specifically, the longer the repair line length, the greater the repair line load, the greater the equivalent resistance value R of the repair line load, the greater the impact of the repair line load on the voltage drop of the light-emitting device 30, and accordingly, the greater the voltage value of the compensation signal PVDD*; the shorter the repair line length, the smaller the repair line load, the smaller the equivalent resistance value R of the repair line load, the smaller the impact of the repair line load on the voltage drop of the light-emitting device 30, and accordingly, the smaller the voltage value of the compensation signal PVDD*. Figure 1 and Figure 2 The length of the repair line in the display panel 1 is L+L0. Figure 3 The length of the repair line in the display panel 1 is L / 2+L0, then Figure 1 and Figure 2 The compensation signal PVDD* in can be set to the same voltage value, and Figure 1 and Figure 2 The voltage value of the compensation signal PVDD* is greater than Figure 3The voltage value of the compensation signal PVDD* in.

[0085] Please continue reading Figures 1 to 11 In one embodiment, the voltage value of the compensation signal PVDD* is the product of the maximum pixel current and the repair circuit load. The maximum pixel current is the current of the pixel circuit 20 at maximum brightness. That is, PVDD* = Idmax*R, where PVDD* represents the voltage value of the compensation signal PVDD*, Idmax represents the maximum pixel current, and R represents the resistance value of the repair circuit load. In this way, the voltage of the compensation signal PVDD* can be used to fully compensate for the anode voltage drop of the light-emitting device 30 caused by the repair circuit load, thereby eliminating the impact of the repair circuit load on the light-emitting brightness and improving the display effect of the display panel 1.

[0086] Please continue reading Figure 9 In one embodiment, the compensation circuit 120 includes a compensation transistor M1 and a first capacitor C1. The gate of the compensation transistor M1 is configured to receive a compensation control signal. The first electrode of the compensation transistor M1 is connected to the output terminal of the first light-emitting control transistor M4 in the sub-pixel circuit 110. The second electrode of the compensation transistor M1 is connected to the first electrode of the first capacitor C1. The second electrode of the first capacitor C1 is configured to receive a compensation signal PVDD*. The compensation transistor M1 is configured to be turned on when the target light-emitting device is in a light-emitting phase under the action of the compensation control signal. The first capacitor C1 is configured to maintain the anode potential of the target light-emitting device based on the received compensation signal PVDD* when the compensation transistor M1 is in a conductive state.

[0087] Please continue reading Figure 9 and Figure 10In one embodiment, the sub-pixel circuit 110 and the pixel circuit 20 of the pixel repair circuit 10 each include a driving transistor M0, a data writing transistor M3, a first emission control transistor M4, a second emission control transistor M5, a threshold compensation transistor M6, a first initialization transistor M7, a second initialization transistor M2, and a second capacitor C2. The gate of the driving transistor M0 is connected to the first electrode of the threshold compensation transistor M6, the second electrode of the first initialization transistor M7, and the first electrode of the second capacitor C2. The first electrode of the driving transistor M0 is connected to the second electrode of the second emission control transistor M5 and the first electrode of the data writing transistor M3. The second electrode of the driving transistor M0 is connected to the second electrode of the threshold compensation transistor M6 and the first electrode of the first emission control transistor M4. The first electrode of the second emission control transistor M5 is connected to the second electrode of the second capacitor C2, and the first electrode of the second emission control transistor M5 is configured to receive a high-level first power supply signal PVDD. The gate of the second emission control transistor M5 is configured to receive an emission control signal Emit. The first electrode of the first initialization transistor M7 is configured to receive a first initialization signal Vref1, and the gate of the first initialization transistor M7 is configured to receive a first scanning signal S1. The second electrode of the data write transistor M3 is configured to receive the data write signal Vdata, and the gate of the data write transistor M3 is configured to receive the second scan signal S2. The gate of the threshold compensation transistor M6 is configured to receive the second scan signal S2. The first electrode of the second initialization transistor M2 is configured to receive the second initialization signal Vref2. The second electrode of the second initialization transistor M2 is connected to the second electrode of the second emission control transistor M5, with the corresponding connection node being N. The cathode of the light-emitting device 30 is configured to receive the second power supply signal PVSS in a low-level state. The gate of the second initialization transistor M2 is configured to receive the third scan signal S3. The gate of the first emission control transistor M4 is configured to receive the emission control signal Emit.

[0088] Please continue reading Figures 9 to 11 When the pixel circuit 20 is operating normally, the second electrode of the first emission control transistor M4 in the pixel circuit 20 is connected to the second electrode of its second initialization transistor M2 and the anode of the light-emitting device 30. The second electrode of the first emission control transistor M4 in the sub-pixel circuit 110 is connected to the second electrode of its second initialization transistor M2 and the first electrode of the compensation transistor M1. Furthermore, the anode of the light-emitting device 30 is disconnected from the second electrode of the first emission control transistor M4 and the first electrode of the compensation transistor M1 in the sub-pixel circuit 110. Based on this, the pixel circuit 20 drives the light-emitting device 30 to emit light.

[0089] Please continue reading Figure 9 、 Figure 10 and Figure 12In the event of an abnormality in the pixel circuit 20, the second electrode of the first emission control transistor M4 of the pixel circuit 20 is connected to the second electrode of the second initialization transistor M2, and the second electrode of the first emission control transistor M4 of the pixel circuit 20 is disconnected from the anode of the light-emitting device 30. The second electrode of the first emission control transistor M4 in the sub-pixel circuit 110 is connected to the second electrode of its second initialization transistor M2, the first electrode of the compensation transistor M1, and the anode of the light-emitting device 30. Based on this, the sub-pixel circuit 110 and the compensation circuit 120 jointly drive the light-emitting device 30 to emit light.

[0090] Please continue reading Figures 9 to 12 , exemplarily, the compensation control signal received by the gate of the compensation transistor M1 may be the same signal as the light emitting control signal Emit. It should be noted that, Figures 9 to 12 This is merely an example. In actual applications, the sub-pixel circuit 110 and the pixel circuit 20 may also have other structures such as 8T1C, 9T2C, etc., which are not limited here.

[0091] Please continue reading Figures 8 to 12 , analyze the abnormal situation of the pixel circuit from the two aspects of resistance and capacitance. On the one hand, the influence of resistance: in the pixel circuit, PVDD = Vds (transistor source-drain voltage difference) + Ir (repair circuit loading) + Voled (light-emitting device cross-voltage). When Ir increases, both Vds and Voled will decrease slightly, resulting in a slight change in Ids affecting the brightness. At high brightness, Vgs increases, and Ids will be more affected by the increase in Vds, making it easier to observe dark spots. On the other hand, the influence of capacitance: since the repair line (including the first repair line and the second repair line) may overlap with the signal line such as the data write signal line Vdata in the circuit, the data write signal line Vdata will drive the potential of the connection node N to drop when charging, affecting the Ioled current, resulting in the light emission of the light-emitting device being affected. In this regard, the display panel provided in the embodiment of the present application can ensure that the length of the repair line between the pixel repair circuit and the light-emitting device corresponding to the pixel circuit at different positions is the same. Therefore, it can not only ensure that the resistance equivalent to the repair line load is equivalent, but also ensure that the coupling capacitance generated between the connection node N node and the signal line such as the data writing signal line Vdata is equivalent. Based on this, the repair line load (RCLoading) is compensated by the pixel repair circuit, which can eliminate the influence of resistance and capacitance caused by inconsistent repair line lengths, thereby improving the display effect.

[0092] Please continue reading Figures 1 to 12In one embodiment, the display panel 1 may be a display panel 1 designed with LTPS (Low Temperature Polycrystalline Silicon), and on this basis, the display panel 1 may include low-temperature polycrystalline silicon transistors. In another embodiment, the display panel 1 may be a display panel 1 designed with LTPO (Low Temperature Polycrystalline Oxide), and on this basis, the display panel 1 may include low-temperature polycrystalline oxide transistors.

[0093] Based on the same application concept, an embodiment of the present application further provides a display device 1000 . Figure 13 A schematic diagram of the structure of a display device 1000 provided in an embodiment of the present application is shown in FIG. Figure 13 As shown, the display device 1000 includes the display panel 1 in any of the above embodiments. Figure 13 As shown, the display device 1000 includes a display panel 1. Therefore, the display device 1000 also has the beneficial effects of the display panel 1 in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel 1 and will not be repeated below.

[0094] The display device 1000 provided in the embodiment of the present application can be Figure 13 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of this application do not specifically limit this.

[0095] Based on the same application concept, an embodiment of the present application also provides a pixel repair method involving the aforementioned display panel 1. The display panel 1 in one or more pixel repair method embodiments provided below can refer to the relevant description above and will not be repeated here.

[0096] Figure 14 A flowchart of a pixel repair method provided in an embodiment of the present application. Figures 1 to 14 , the pixel repair method may include the following steps S1401 to S1404.

[0097] S1401: Confirm the target pixel circuit to be repaired.

[0098] S1402: Determine a corresponding target connection point and a target pixel repair circuit according to the target pixel circuit.

[0099] S1403: Disconnect the target pixel circuit and the corresponding target light-emitting device.

[0100] S1404: Turn on the paths corresponding to the target connection point and the corresponding first repair line and second repair line, wherein the first repair line is connected to the anode of the target light-emitting device, and the second repair line is connected to the target pixel repair circuit.

[0101] The display device 1000 includes Figure 1 and Figure 2 Taking the display panel 1 shown as an example, each pixel repair circuit 10 supports repairing a pixel circuit 20 at any position in the pixel circuit 20 of the corresponding row. Figure 3 Taking the display panel 1 shown as an example, each pixel repair circuit 10 supports repairing a pixel circuit 20 at any position in the pixel circuits 20 corresponding to a half row.

[0102] In application, if there is a target pixel circuit to be repaired, that is, an abnormal pixel circuit 20, in the display panel 1, the corresponding target connection point and target pixel repair circuit can be determined based on the target pixel circuit, and then the path between the target pixel circuit and the anode of the corresponding target light-emitting device is disconnected, and the first repair line 51 and the second repair line 52 are respectively connected at the target connection point by laser sintering, thereby conducting the repair path between the target pixel repair circuit and the anode of the target light-emitting device, and then driving the target light-emitting device to emit light by replacing the target repair circuit with the target pixel repair circuit. Since in the display panel 1 provided in the embodiment of the present application, the repair line length between the pixel repair circuit 10 and the light-emitting device 30 corresponding to the pixel circuit 20 at different positions that it supports repair is the same, therefore, the pixel repair method provided in the embodiment of the present application can improve the display effect of the display device 1000.

[0103] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: include: Pixel repair circuit; Pixel circuit, the pixel circuit is connected to the anode of the light-emitting device, and each row of pixel circuits is correspondingly provided with at least one pixel repair circuit; wherein, The pixel repair circuit is configured with a first repair line and a second repair line, the first repair line and the second repair line respectively extend along a first direction, the first repair line is connected to the anode of the light-emitting device, and the second repair line is respectively connected to the pixel repair circuit and the first repair line, and the driving voltage output by the pixel repair circuit is transmitted to the anode of the light-emitting device through the first repair line and the second repair line; wherein, The sum of the distance from the target light-emitting device corresponding to the target pixel circuit to the target connection point and the distance from the target connection point to the target pixel repair circuit satisfies a preset fixed value. The target connection point is the connection point between the first repair line and the second repair line, and the target pixel circuit is any one of the multiple pixel circuits supported for repair by the target pixel repair circuit.

2. The display panel according to claim 1, wherein: The distance between the target connection point and the target pixel circuit is negatively correlated with the distance between the target pixel circuit and the target pixel repair circuit; the distance between the target connection point and the target pixel circuit is positively correlated with the width of each row of pixel circuits along the first direction.

3. The display panel according to claim 2, wherein: Each row of pixel circuits is provided with a pixel repair circuit, and the pixel repair circuit is located on one side of the pixel circuit of the corresponding row in the first direction. The distance between the target connection point and the target pixel circuit is (LX) / 2, where L represents the width of each row of pixel circuits in the first direction, and X represents the distance between the target pixel circuit and the target pixel repair circuit.

4. The display panel according to claim 2, wherein: Each row of pixel circuits is provided with two pixel repair circuits, and each pixel repair circuit is located on both sides of the pixel circuit of the corresponding row in the first direction. The distance between the target connection point and the target pixel circuit is (L / 2-X) / 2, where L represents the width of each row of pixel circuits in the first direction, and X represents the distance between the target pixel circuit and the target pixel repair circuit.

5. The display panel according to claim 1, wherein: The first repair line includes a first main line and at least one first branch, wherein the first branch is connected to the first main line; The second repair line includes a second main line and at least one second branch, the second branch is connected to the second main line; wherein the first branch and the second branch are arranged correspondingly in the second direction, the light emitting device is correspondingly provided with at least one first branch, and the second direction intersects with the first direction; The first branch and the second branch corresponding to the target light-emitting device are connected via a connector; wherein the connector is located at the target connection point.

6. The display panel according to claim 5, wherein: The first repair line and the second repair line are arranged in the same layer.

7. The display panel according to claim 6, wherein: The connecting member includes a conductive layer, a first conductive plug and a second conductive plug, wherein the conductive layer and the first repair line are arranged in a different layer, the conductive layer is connected to the first repair line through the first conductive plug, and the conductive layer is connected to the second repair line through the second conductive plug.

8. The display panel according to claim 7, wherein: The display panel includes a substrate and a first metal layer, a second metal layer, and a third metal layer sequentially away from the substrate, wherein the first repair line and the second repair line are respectively located in the second metal layer, and the conductive layer and the anode of the light-emitting device are respectively located in the third metal layer; Alternatively, the display panel includes a substrate and a first metal layer, a second metal layer, a third metal layer and a fourth metal layer sequentially away from the substrate, wherein the first repair line, the second repair line and the anode of the light-emitting device are respectively located in the third metal layer, and the conductive layer is located in the second metal layer.

9. The display panel according to claim 5, wherein: The first repair line and the second repair line are arranged in different layers.

10. The display panel according to claim 9, wherein: The connecting member includes a third conductive plug, and the third conductive plug is connected to the first repair line and the second repair line respectively.

11. The display panel according to claim 10, wherein: The display panel includes a substrate and a first metal layer, a second metal layer, a third metal layer and a fourth metal layer sequentially away from the substrate, wherein the first repair line is located in the second metal layer, and the second repair line and the anode of the light-emitting device are respectively located in the third metal layer.

12. The display panel according to claim 11, wherein: At least one signal line is located in the fourth metal layer, the signal line is connected to the pixel circuit, and the signal line is used to provide at least one of a data signal, a power signal, and a control signal to the pixel circuit.

13. The display panel according to any one of claims 8 to 12, characterized in that: An orthographic projection of the connecting member toward the substrate does not overlap with an orthographic projection of the first metal layer toward the substrate.

14. The display panel according to any one of claims 7 to 9, 11 and 12, characterized in that: The size of each conductive plug in one direction is greater than or equal to the sum of the minimum metal line width and the minimum overlap width, and the size of each conductive plug in another direction is greater than or equal to the minimum overlap width, wherein the one direction intersects the other direction.

15. The display panel according to claim 1, wherein The pixel repair circuit includes a sub-pixel circuit and a compensation circuit, wherein the input end of the compensation circuit is used to receive a compensation signal, and the output end of the compensation circuit is connected to the output end of the first light-emitting control transistor of the sub-pixel circuit; wherein, The output end of the compensation circuit of the target pixel repair circuit is also connected to the anode of the target light-emitting device; wherein, When the target pixel circuit is abnormal, the sub-pixel circuit and the compensation circuit jointly drive the target light-emitting device to emit light; when the target pixel circuit is normal, the target pixel circuit drives the target light-emitting device to emit light.

16. The display panel according to claim 15, wherein: The voltage value of the compensation signal is positively correlated with the repair circuit load, and the repair circuit load is positively correlated with the repair circuit length; wherein the repair circuit length is the sum of the distance between the target pixel circuit and the target connection point, and the distance between the target connection point and the target pixel repair circuit.

17. The display panel according to claim 16, wherein: The voltage value of the compensation signal is the product of the maximum pixel current and the load of the repair circuit; wherein the maximum pixel current is the current of the pixel circuit at maximum brightness.

18. A display device, characterized in that: The device comprises a display panel according to any one of claims 1 to 17.

19. A pixel repair method, characterized in that: Applied to the display panel according to any one of claims 1 to 17, the method comprises: Identify the target pixel circuit to be repaired; Determining a corresponding target connection point and a target pixel repair circuit according to the target pixel circuit; disconnecting the target pixel circuit from the corresponding target light-emitting device; The target connection point is connected to the corresponding first repair line and second repair line respectively; wherein the first repair line is connected to the anode of the target light-emitting device, and the second repair line is connected to the target pixel repair circuit.

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