Display panel, display device and pixel repair method

Patent metadata

Field	Value
Publication number	US-12597387-B2
Application number	US-202418932629-A
Country	US
Kind code	B2
Filing date	Oct 31, 2024
Priority date	May 31, 2024
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

Embodiments of the present application provides a display panel, a display device and a pixel repair method, the display panel comprises: pixel repair circuits; pixel circuits, each row of pixel circuits being provided with at least one pixel repair circuit; the pixel repair circuits are provided with first and second repair lines extending along a first direction, the first repair lines being connected with the anodes of the light-emitting device, the second repair lines being connected with the pixel repair circuits and the first repair lines, driving voltages output by the pixel repair circuits being transmitted to the anodes of the light-emitting device via the first and the second repair lines; a sum of a distance between a target light-emitting device corresponding to a target pixel circuit and a target connecting point and a distance between the target connecting point and a target pixel repair circuit meets a preset condition.

First claim

What is claimed is:

1 . A display panel, comprising:
pixel repair circuits; pixel circuits connected with anodes of light-emitting devices, each row of the pixel circuits being provided with at least one of the pixel repair circuits, wherein the pixel repair circuits each are provided with a first repair line and a second repair line both extending along a first direction, the first repair lines being connected with the anodes of the light-emitting devices, the second repair lines being connected with the pixel repair circuits and the first repair lines, driving voltages output by the pixel repair circuits being transmitted to the anodes of the light-emitting devices via the first repair lines and the second repair lines; a sum of a distance between a target light-emitting device corresponding to a target pixel circuit and a target connecting point and a distance between the target connecting point and a target pixel repair circuit meets a preset condition, the target connecting point being one of connecting points between the first repair lines and the second repair lines, and the target pixel circuit being any one of the pixel circuits repair of which is supported by the target pixel repair circuit; the distance between the target connecting point and the target pixel circuit is negatively correlated with the distance between the target pixel circuit and the target pixel repair circuit; and the distance between the target connecting point and the target pixel circuit is positively correlated with the width of each row of the pixel circuits along the first direction.

2 . The display panel of claim 1 , wherein each row of the pixel circuits is provided with one of the pixel repair circuits that is located on a side of the corresponding row of the pixel circuits in the first direction, and the distance between the target connecting point and the target pixel circuit is (L−X)/2, where L represents the width of each row of the pixel circuits in the first direction, and X represents the distance between the target pixel circuit and the target pixel repair circuit.

3 . The display panel of claim 1 , wherein each row of the pixel circuits is provided with two of the pixel repair circuits that are located on two sides of the corresponding row of the pixel circuits in the first direction respectively, and the distance between the target connecting point and the target pixel circuit is (L/2−X)/2, where L represents the width of each row of the 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 of claim 1 , wherein at least one of the pixel repair circuits comprises a sub-pixel circuit and a compensation circuit, an input end of the compensation circuit being configured to receive a compensation signal, and an output end of the compensation circuit being connected with an output end of a first light-emitting control transistor of the sub-pixel circuit;
an output end of the compensation circuit of the target pixel repair circuit is connected with the anode of the target light-emitting device; when the target pixel circuit is abnormal, the sub-pixel circuit and the compensation circuit together 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.

5 . The display panel of claim 4 , wherein the voltage value of the compensation signal is positively correlated with a repair line load which is positively correlated with a repair line length which is a sum of a distance between the target pixel circuit and the target connecting point and a distance between the target connecting point and the target pixel repair circuit.

6 . The display panel of claim 5 , wherein the voltage value of the compensation signal is a product of a maximum pixel current and the repair line load, the maximum pixel current being a current of the pixel circuit at maximum brightness.

7 . A display panel, comprising:
pixel repair circuits; pixel circuits connected with anodes of light-emitting devices, each row of the pixel circuits being provided with at least one of the pixel repair circuits, wherein the pixel repair circuits each are provided with a first repair line and a second repair line both extending along a first direction, the first repair lines being connected with the anodes of the light-emitting devices, the second repair lines being connected with the pixel repair circuits and the first repair lines, driving voltages output by the pixel repair circuits being transmitted to the anodes of the light-emitting devices via the first repair lines and the second repair lines; a sum of a distance between a target light-emitting device corresponding to a target pixel circuit and a target connecting point and a distance between the target connecting point and a target pixel repair circuit meets a preset condition, the target connecting point being one of connecting points between the first repair lines and the second repair lines, and the target pixel circuit being any one of the pixel circuits repair of which is supported by the target pixel repair circuit; the first repair line comprises a first main line and at least one first branch connected with the first main line; and the second repair line comprises a second main line and at least one second branch connected with the second main line, the first branch being arranged corresponding to the second branch in a second direction, the light-emitting devices each being arranged corresponding to at least one of the first branches, the second direction intersecting with the first direction, the first branch and the second branch arranged corresponding to the target light-emitting device being connected via one of connectors that is located at the target connecting point.

8 . The display panel of claim 7 , wherein the first repair lines and the second repair lines are arranged in a same layer.

9 . The display panel of claim 8 , wherein the connectors each comprise a conductive layer, a first conductive plug, and a second conductive plug, the conductive layers and the first repair line being arranged in different layers, the conductive layers being connected with the first repair line via the first conductive plug and connected with the second repair lines via the second conductive plugs.

10 . The display panel of claim 9 , wherein the display panel comprises a substrate and a first metal layer, a second metal layer and a third metal layer sequentially away from the base plate, the first repair lines and the second repair lines being located in the second metal layer, and the conductive layers and the anodes of the light-emitting devices being located in the third metal layer; or
the display panel comprises a substrate and a first metal layer, a second metal layer, a third metal layer and a fourth metal layer sequentially away from the base plate, the first repair lines, the second repair lines and the anodes of the light-emitting devices being located in the third metal layer, and the conductive layers being located in the second metal layer.

11 . The display panel of claim 10 , wherein orthographic projections of the connectors toward the substrate do not overlap with an orthographic projection of the first metal layer toward the base plate.

12 . The display panel of claim 9 , wherein a size of each of the conductive plugs in one direction is greater than or equal to a sum of a minimum metal line width and a minimum overlap width, and a size of each of the conductive plugs in the other direction is greater than or

Assignees

• Wuhan Tianma Microelectronics Co Ltd
• Wuhan Tianma Microelectronics Co Ltd Shanghai Branch

Inventors

• Guo Jiamin

Classifications

• G09G3/3225

  using an active matrix · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2330/10

  Dealing with defective pixels · CPC title

• G09G2330/08

  Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title