US-12622094-B2 - Display panel and repair method thereof

US12622094B2US 12622094 B2US12622094 B2US 12622094B2US-12622094-B2

Abstract

A display panel is provided with a conductive layer having a conductive connecting line for connecting a light-emitting element. The conductive layer is further provided with a redundant conductive connecting line for connecting a standby light-emitting element. The repair method of the display panel includes: detecting whether the light-emitting element is abnormal; electrically connecting the redundant conductive connecting line with the conductive connecting line when the light-emitting element is abnormal; and connecting the standby light-emitting element to a redundant conductive connecting line to replace the light-emitting element with abnormal function.

Inventors

Zeyao Li
Baohong KANG

Assignees

CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
HKC Corporation Limited

Dates

Publication Date: 20260505
Application Date: 20221212
Priority Date: 20220222

Claims (18)

1 . A repair method of a display panel, wherein the display panel is provided with a conductive layer having a conductive connecting line for connecting a light-emitting element, wherein the conductive layer is further provided with a redundant conductive connecting line for connecting a standby light-emitting element, and the method comprises: detecting whether the light-emitting element is abnormal; electrically connecting the redundant conductive connecting line with the conductive connecting line when the light-emitting element is abnormal; and connecting the standby light-emitting element to the redundant conductive connecting line to replace the light-emitting element with abnormal function; wherein the redundant conductive connecting line is disconnected from the conductive connecting line through a spacer, and the electrically connecting the redundant conductive connecting line with the conductive connecting line comprises: melting the spacer by laser until the redundant conductive connecting line on either side of the spacer is electrically connected with the conductive connecting line on another side of the spacer.
2 . The method according to claim 1 , wherein before detecting whether the light-emitting element is abnormal, the method further comprises: forming a patterned conductive layer on a substrate corresponding to the display panel, wherein the conductive layer comprises a first conductive layer provided with a plurality of conductive connecting lines and a second conductive layer provided with the redundant conductive connecting line, the redundant conductive connecting line being interleaved with the conductive connecting line.
3 . The method according to claim 2 , wherein the forming a patterned conductive layer on a substrate corresponding to the display panel comprises: forming a patterned first conductive layer on the substrate corresponding to the display panel; forming an isolation layer on the first conductive layer; and forming a patterned second conductive layer on the isolation layer.
4 . The method according to claim 1 , wherein an electrode is formed at an end of the redundant conductive connecting line, wherein the connecting the standby light-emitting element to the redundant conductive connecting line comprises: providing the standby light-emitting element; and connecting the standby light-emitting element to the electrode and forming an electrical connection.
5 . The method according to claim 1 , further comprising removing the light-emitting element with abnormal function.
6 . A display panel, having a conductive layer comprising a conductive connecting line for electrically connecting with a light-emitting element, wherein the conductive layer further comprises: a redundant conductive connecting line disconnected from the conductive connecting line through a spacer, the redundant conductive connecting line being configured for connecting a standby light-emitting element, wherein the redundant conductive connecting line is electrically connected to the conductive connecting line when the light-emitting element is abnormal, and a standby light-emitting element is connected to the redundant conductive connecting line to replace the light-emitting element with abnormal function.
7 . The display panel according to claim 6 , wherein an insulating medium is formed between the conductive connecting line and the redundant conductive connecting line; wherein the conductive connecting line and the redundant conductive connecting line are interleaved through the insulating medium so that the insulating medium corresponding to an interleaved position forms a spacer, wherein the spacer is capable of being melted by laser, and the redundant conductive connecting line is electrically connected to the conductive connecting line.
8 . The display panel according to claim 6 , wherein the redundant conductive connecting line is formed with a connecting position for the standby light-emitting element, wherein the display panel is provided with a plurality of pixel units, wherein each pixel unit is provided with a plurality of the light-emitting elements and at least one connecting position for the standby light-emitting element, wherein the connecting position for the standby light-emitting element is connected to the standby light-emitting element to replace the light-emitting element with abnormal function when one of the light-emitting elements is abnormal.
9 . The display panel according to claim 8 , wherein the connecting position for the standby light-emitting element is disposed between at least two of the light-emitting elements, enabling at least two of the light-emitting elements to share the connecting position for the standby light-emitting element.
10 . The display panel according to claim 6 , wherein the conductive connecting line connecting to the light-emitting element with abnormal function is cut to be disconnected from a driving element.
11 . The display panel according to claim 6 , wherein the light-emitting element is a micro LED for emitting red, blue or green light.
12 . A display panel, comprising: a light-emitting element; and a conductive layer having a conductive connecting line for connecting the light-emitting element, and provided with a redundant conductive connecting line for connecting a standby light-emitting element, wherein when the light-emitting element is detected to be abnormal, the redundant conductive connecting line is electrically connected to the conductive connecting line, and the standby light-emitting element is connected to the redundant conductive connecting line to replace the light-emitting element with abnormal function; wherein the redundant conductive connecting line is disconnected from the conductive connecting line through a spacer, and the spacer is melted by laser when the light-emitting element is detected to be abnormal, so that the redundant conductive connecting line on either side of the spacer is electrically connected with the conductive connecting line on another side of the spacer.
13 . The display panel according to claim 12 , wherein the conductive layer comprises a first conductive layer provided with a plurality of conductive connecting lines and a second conductive layer provided with the redundant conductive connecting line, wherein the redundant conductive connecting line is interleaved with the conductive connecting line.
14 . The display panel according to claim 13 , wherein an isolation layer is formed on the first conductive layer, and the second conductive layer is formed on the isolation layer.
15 . The display panel according to claim 14 , wherein the isolation layer is melt by laser at an interleaved position of the conductive connecting line and the redundant conductive connecting line when the light-emitting element is abnormal.
16 . The display panel according to claim 12 , wherein the conductive connecting line connecting to the light-emitting element with abnormal function is cut to be disconnected from a driving element.
17 . The display panel according to claim 12 , wherein a connecting position of the standby light-emitting element is disposed between at least two of the light-emitting elements, enabling at least two of the light-emitting elements to share the connecting position for the standby light-emitting element.
18 . The display panel according to claim 12 , wherein the display panel is provided with a plurality of pixel units, each of which is provided with a plurality of the light-emitting elements and at least one connecting position for the standby light-emitting element, wherein the light-emitting element is a micro LED for emitting red, blue or green light.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202210162226.6, filed Feb. 22, 2022, the entire disclosure of which is incorporated herein by reference. FIELD OF TECHNOLOGY The present disclosure relates to the technical field of display panels, more particularly, to a display panel and a repair method of the display panel. BACKGROUND With the vigorous development of display industry, Micro LED, as a new generation display technology, has stepped onto the stage of the times. Compared with the existing OLED and LCD technology, Micro LED has higher brightness, lower power consumption and longer service life. However, there are still many problems to be solved at present, the current process technology, inspection standards or manufacturing costs of the micro-LED are far from the purpose of mass production and commercial application. Repair technology is a difficult point in the display industry. FIGS. 1a and 1b show a repair method of a Micro LED display panel in tradition. FIG. 1a shows a schematic diagram of removing a light-emitting element with abnormal function in tradition, and FIG. 1B shows a schematic diagram of a replacement of standby light-emitting element in tradition. As shown in FIGS. 1a and 1b, there are at least three light-emitting elements on the substrate, and the three light-emitting elements may be tri-phosphor LEDS, for example, the light-emitting element 201a′ emits red light, the light-emitting element 201b′ emits green light, and the light-emitting element 201c′emits blue light. The traditional repair method is to remove the light-emitting element 201a′ with abnormal function and replace with a new standby light-emitting element 204′, in which two processes of removal and replacement are involved. However, since the removal of the light-emitting element requires performing operation on the bottom of the light-emitting element, it is difficult to implement the operation without affecting other light-emitting elements and conductive lines. Therefore, there is an urgent need for a simpler and more effective method to repair the display panel. The above information disclosed in the Background is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute prior art known to a person of ordinary skill in the art. SUMMARY There are provided a display panel and a repair method for the display panel according to embodiments of the present disclosure. The technical solution is as below: According to a first aspect of the present disclosure, there is provided a repair method of a display panel provided with a conductive layer having a conductive connecting line for connecting light-emitting element, the conductive layer is further provided with a redundant conductive connecting line for connecting a standby light-emitting element, and the method includes detecting whether he light-emitting element is abnormal; electrically connecting the redundant conductive connecting line with the conductive connecting line when the light-emitting element is abnormal; and connecting the standby light-emitting element to a redundant conductive connecting line to replace the light-emitting element with abnormal function. According to a second aspect of the present disclosure, there is also provided a display panel, having a conductive layer including a conductive connecting line for electrically connecting with a light-emitting element, the conductive layer further includes: a redundant conductive connecting line disconnected from the conductive connecting line through a spacer, the redundant conductive connecting line being configured for connecting a standby light-emitting element. The redundant conductive connecting line is electrically connecting the redundant conductive connecting line with the conductive connecting line when the light-emitting element is abnormal. A standby light-emitting element is connected to the redundant conductive connecting line to replace the light-emitting element with abnormal function. It should be understood that the above general description and the following detailed description are exemplary only and are not limiting to the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present disclosure will become more apparent by describing exemplary embodiments thereof in detail with reference to the accompanying drawings. FIG. 1a shows a schematic diagram of removing a light-emitting element with abnormal function in tradition. FIG. 1B shows a schematic diagram of a replacement of standby light-emitting element in tradition. FIG. 2 is a structural diagram of a conductive layer according to a first embodiment of the present disclosure. FIG. 3 is a flowchart of a repair method of a display panel according to a second embodiment of the present disclosure. FIG. 4 is a sectional v