CN-122024633-A - Display module and automatic repair method thereof

Abstract

The application discloses a display module and an automatic repair method thereof, wherein the display module comprises: a first signal line, a target circuit, and a fuse circuit. The first signal line is electrically connected to the target circuit through a fuse circuit, and the fuse circuit is disconnected when the target circuit fails. According to the application, after the fault of the target circuit is detected, the connection between the faulty target circuit and the first signal wire is cut off through the fusing circuit, so that the voltage abnormality of the first signal wire caused by the connection with the faulty target circuit is avoided, and the abnormal voltage of the first signal wire in the display module is repaired through the fusing circuit after the fault of the target circuit is further realized, so that the display module can normally display.

Inventors

• CHEN XI

Assignees

• 武汉天马微电子有限公司上海分公司

Dates

Publication Date

20260512

Application Date

20260303

Claims (20)

1. 1. A display module, comprising: A first signal line; A target circuit; and the first signal line is electrically connected with the target circuit through the fusing circuit, and the fusing circuit is disconnected under the condition that the target circuit fails.
2. 2. The display module of claim 1, further comprising a detection trigger circuit; The detection trigger circuit is connected with the first signal line, and is configured to detect a voltage of the first signal line to determine whether the target circuit fails, and trigger the fuse circuit to open if it is determined that the target circuit fails.
3. 3. The display module according to claim 1 or 2, wherein the fuse circuit includes a first transistor and a second transistor; The grid electrode of the first transistor is connected with a first driving signal line, the first pole of the first transistor is connected with a second driving signal line, the second pole of the first transistor is connected with the first grid electrode of the second transistor, the first pole of the second transistor is connected with the first signal line, and the second pole of the second transistor is connected with the target circuit; in the case of a failure of the target circuit, the first transistor is turned on, and the second driving signal on the second driving signal line is transmitted to the first gate of the second transistor, so that the channel of the second transistor is fused.
4. 4. A display module according to claim 3, wherein a first gate insulating layer is provided between the gate electrode of the first transistor and the active layer of the first transistor, and a second gate insulating layer is provided between the first gate electrode of the second transistor and the active layer of the second transistor in a thickness direction of the display module, and a thickness of the second gate insulating layer is smaller than a thickness of the first gate insulating layer.
5. 5. A display module according to claim 3, wherein the second transistor has a channel width to length ratio greater than that of the first transistor.
6. 6. A display module according to claim 3, wherein the first transistor is located between the second transistor and the second driving signal line in a thickness direction of the display module.
7. 7. A display module according to claim 3, wherein the display module comprises a substrate and a buffer layer, a first insulating layer, a first semiconductor layer, a first gate insulating layer, a first gate layer, a second insulating layer, a second gate insulating layer, a second semiconductor layer, which are sequentially remote from the substrate; The active layer of the first transistor is positioned on the first semiconductor layer, and the grid electrode of the first transistor is positioned on the first grid electrode layer; the active layer of the second transistor is located on the second semiconductor layer, and the first gate of the second transistor is located on the second gate layer.
8. 8. The display module of claim 7, wherein the second driving signal line is located between the buffer layer and the first insulating layer.
9. 9. A display module according to claim 3, wherein the target circuit comprises a pixel drive circuit comprising a drive transistor, a second pole of the second transistor being electrically connected to a gate of the drive transistor.
10. 10. The display module of claim 9, wherein the second transistor further comprises a second gate, the second gate being connected to the first scan line.
11. 11. The display module of claim 10, wherein the first gate and the second gate of the second transistor are located on both sides of the active layer thereof, respectively, in a thickness direction of the display module.
12. 12. The display module of claim 2, wherein the first signal line comprises a first sub-signal line and a second sub-signal line, the first sub-signal line extending along a first direction and the second sub-signal line extending along a second direction; The first sub-signal line is electrically connected to the second sub-signal line.
13. 13. The display module assembly of claim 12, wherein the display module assembly comprises, The target circuit includes a plurality of sub-target circuits; The detection trigger circuit comprises a detection module; The detection module is configured to detect voltages of a plurality of the first sub-signal lines to determine the sub-target circuit that fails in the first direction, and to detect voltages of a plurality of the second sub-signal lines to determine the sub-target circuit that fails in the second direction.
14. 14. The display module of claim 13, wherein the detection module comprises at least two detection units; The at least two detection units comprise a first detection unit and a second detection unit; The first detection unit is connected with a plurality of first sub-signal lines, and the second detection unit is connected with a plurality of second sub-signal lines; The first detection unit is configured to detect voltages of a plurality of the first sub-signal lines to determine the sub-target circuit that fails in the first direction, and the second detection unit is configured to detect voltages of the second sub-signal lines to determine the sub-target circuit that fails in the second direction.
15. 15. The display module assembly of claim 14, wherein the display module assembly comprises, The first detection unit is configured to detect voltages of a plurality of the first sub-signal lines to determine a first sub-signal line of the plurality of the first sub-signal lines whose voltage is greater than a first voltage threshold; The second detection unit is configured to detect voltages of a plurality of the second sub-signal lines to determine a second sub-signal line of the plurality of the second sub-signal lines whose voltage is greater than a second voltage threshold; the first voltage threshold is the global voltage of the plurality of first sub-signal lines, and the second voltage threshold is the global voltage of the plurality of second sub-signal lines.
16. 16. The display module assembly of claim 14, wherein the at least two detection units further comprise a third detection unit; The third detection unit is connected with a plurality of the first sub-signal lines; the third detection unit is configured to detect voltages of a plurality of the first sub-signal lines to determine the sub-target circuit that fails in the first direction.
17. 17. The display module of claim 14 or 16, wherein the detection trigger circuit further comprises a control unit and a trigger unit; The control unit is connected with the at least two detection units and the triggering unit; the control unit is used for determining a sub-target circuit with faults according to the first sub-signal line and the second sub-signal line with abnormal voltage, and is also used for controlling the triggering unit to provide triggering signals for the fusing circuits corresponding to the sub-target circuit with faults so as to control the fusing circuits to be disconnected.
18. 18. The display module of claim 17, wherein the trigger unit comprises a first sub-trigger unit and a second sub-trigger unit; the first sub-trigger unit is connected with a first driving signal line, and the second sub-trigger unit is connected with a second driving signal line; The first sub-trigger unit is used for providing a first driving signal to the first driving signal line, and the second sub-trigger unit is used for providing a second driving signal to the second driving signal line; The first driving signal is used for controlling the conduction of a first transistor of the fusing circuit, and the second driving signal is used for fusing a channel of a second transistor of the fusing circuit.
19. 19. An automatic repair method for a display module, which is applied to the display module according to any one of claims 1 to 18; the first signal line comprises a first sub-signal line and a second sub-signal line; the target circuit includes a plurality of sub-target circuits; the detection trigger circuit of the display module comprises a first detection unit and a second detection unit; the method comprises the following steps: acquiring a first sub-signal line with abnormal voltage determined by the first detection unit and a second sub-signal line with abnormal voltage determined by the second detection unit; Determining the sub-target circuit having a fault based on the first sub-signal line and the second sub-signal line having abnormal voltages; And controlling the fusing circuit corresponding to the sub-target circuit with the fault to be disconnected.
20. 20. The automatic repair method of claim 19 wherein the detection trigger circuit further comprises a first sub-trigger unit and a second sub-trigger unit; The fuse circuit comprises a first transistor, a second transistor, a first sub-trigger unit, a second sub-trigger unit, a first voltage regulator and a second voltage regulator, wherein the first sub-trigger unit is connected with a grid electrode of the first transistor; The controlling the breaking of the fuse circuit corresponding to the sub-target circuit with the fault comprises: Controlling the second sub-trigger unit to provide a second driving signal and controlling the first sub-trigger unit to provide a first driving signal so as to enable the first transistor corresponding to the failed sub-target circuit to be conducted; wherein the second driving signal is used for fusing the channel of the second transistor.

Description

Display module and automatic repair method thereof Technical Field The application relates to the field of display, in particular to a display module and an automatic repair method thereof. Background The display module can be provided with a circuit and a signal wire connected with the circuit, and after a certain circuit fails, the voltage on the signal wire connected with the circuit can be changed (for example, the voltage on the signal wire is increased), so that other circuits connected with the signal wire are abnormal, and the display module is abnormal in display. Therefore, how to repair the abnormal display problem caused by the fault of the display module after the short-circuit fault of the circuit is detected is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention The embodiment of the application provides a display module and an automatic repair method thereof, wherein after a fault of a target circuit is detected, the connection between the faulty target circuit and a first signal wire is cut off through a fusing circuit, so that voltage abnormality of the first signal wire caused by connection with the faulty target circuit is avoided, and further, the repair of the voltage abnormality of the first signal wire in the display module is completed through the fusing circuit after the fault of the target circuit, so that the display module can normally display. The application provides a display module, which comprises a first signal line, a target circuit and a fusing circuit, wherein the first signal line is electrically connected with the target circuit through the fusing circuit, and the fusing circuit is disconnected under the condition that the target circuit fails. The application provides an automatic repair method of a display module, which is applied to the display module, wherein a first signal line comprises a first sub-signal line and a second sub-signal line, a target circuit comprises a plurality of sub-target circuits, a detection trigger circuit of the display module comprises a first detection unit and a second detection unit, the method comprises the steps of obtaining a first sub-signal line with abnormal voltage determined by the first detection unit and a second sub-signal line with abnormal voltage determined by the second detection unit, determining a sub-target circuit with faults based on the first sub-signal line and the second sub-signal line with abnormal voltage, and controlling a fuse circuit corresponding to the sub-target circuit with faults to be disconnected. The embodiment of the application provides a display module and an automatic repair method thereof, wherein the display module comprises a first signal line, a target circuit and a fusing circuit; the first signal line is electrically connected to the target circuit through a fuse circuit, and the fuse circuit is disconnected when the target circuit fails. A plurality of identical or different target circuits may be connected to the first signal line for supplying a voltage to the target circuit connected thereto. In the event of a failure of the target circuit, the fuse circuit can cut off the connection between the target circuit and the first signal line, thereby avoiding a change in the voltage on the first signal line due to the connection of the first signal line to the failed target circuit. Therefore, after the fault of the target circuit is detected, the connection between the faulty target circuit and the first signal wire is cut off through the fusing circuit, so that the voltage of the first signal wire is ensured to be normal, other circuits connected with the first signal wire can work normally, and further, the repair of the display module is realized after the fault of the target circuit, and the display module can display normally. Drawings Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale. Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present application; Fig. 2 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present application; Fig. 3 is a schematic structural diagram of another display module according to an embodiment of the application; fig. 4 is a schematic partial structure of a display module according to an embodiment of the present application; Fig. 5 is a schematic diagram of a hierarchical structure of a display module according to an embodiment of the application; FIG. 6 is a schematic diagram of a layout of a pixel driving circuit according to an embodiment of the present application; Fig. 7 is a schematic structural diagram of another display module ac