DISPLAY PANEL

• US 20190331975A1
• Filed: 03/27/2019
• Published: 10/31/2019
• Est. Priority Date: 04/25/2018
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Ko, Cheng-Hung, Chen, Yi-Fu, Chang, Yu-Sen, Chen, Chia-Heng, Chen, Hsiao-Chun, Lin, You-Ying, Hsieh, Cheng-An
• Granted Patent: US 11,029,571 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/123 pixel

Abstract

A display panel including a pixel array substrate, an opposite substrate, and a display media is provided. The pixel array substrate includes a substrate, a plurality of scan lines, a plurality of data lines, a plurality of pixel units, and a gate driving circuit. The gate driving circuit including a plurality of first signal lines, a plurality of second signal lines, a plurality of dummy signal lines, and a plurality of contact structures is disposed in a peripheral region of the substrate. Each of the second signal lines is electrically connected to one corresponding first signal line. Each of the dummy signal lines is electrically connected to one corresponding second signal line via one corresponding contact structure. Each of the first signal lines is electrically connected to the corresponding second signal line via one corresponding contact structure.

Claims

1. A display panel, comprising:

a pixel array substrate, comprising;

a substrate having a display region and a peripheral region, wherein the peripheral region is located at a side of the display region;

a plurality of scan lines and a plurality of data lines disposed in the display region;

a plurality of pixel units arranged in the display region in array, and each of the pixel units is electrically connected to one of the scan lines and one of the data lines; and

a gate driving circuit disposed in the peripheral region, wherein the gate driving circuit comprises;

a plurality of first signal lines arranged in the peripheral region along a first direction and extended along a second direction;

a plurality of second signal lines extended along the first direction, and each of the second signal lines is respectively electrically connected to one corresponding first signal line;

a plurality of dummy signal lines extended along the first direction, and each of the dummy signal lines is respectively electrically connected to one corresponding second signal line; and

a plurality of contact structures respectively disposed corresponding to the first signal lines, the second signal lines, and the dummy signal lines, wherein each of the first signal lines is electrically connected to the corresponding second signal line via one corresponding contact structure, and each of the dummy signal lines is electrically connected to the corresponding second signal line via the corresponding contact structure;

an opposite substrate disposed opposite to the pixel array substrate; and

a display media disposed between the opposite substrate and the pixel array substrate.

2. The display panel of claim 1, wherein lengths of the second signal lines are different from one another.

3. The display panel of claim 1, wherein lengths of the dummy signal lines are different from one another.

4. The display panel of claim 1, wherein ends of the dummy signal lines are aligned with an edge of the substrate.

5. The display panel of claim 1, wherein each of the second signal lines is respectively overlapped with at least one of the first signal lines in a vertical projection direction, and each of the dummy signal lines is respectively overlapped with at least one of the first signal lines in the vertical projection direction.

6. The display panel of claim 1, further comprising an insulation layer disposed on the substrate, and each of the pixel units comprising:

an active device comprising a gate, an active layer, a source, and a drain; and

a pixel electrode electrically connected to the drain of the active device,

wherein the insulation layer is located between the gates and the active layers.

7. The display panel of claim 6, wherein a material of the first signal lines is the same as a material of the gate.

8. The display panel of claim 6, wherein the insulation layer is located between the first signal lines and the second signal lines, and the insulation layer is located between the first signal lines and the dummy signal lines.

9. The display panel of claim 6, wherein each of the second signal lines comprises a first sublayer and a second sublayer, and the second sublayer is located on the first sublayer.

10. The display panel of claim 9, wherein a material of the first sublayer is the same as a material of the active layer, and a material of the second sublayer is the same as a material of the source and the drain.

11. The display panel of claim 10, wherein each of the dummy signal lines comprises the first sublayer and the second sublayer.

12. The display panel of claim 9, wherein a material of the first sublayer is the same as a material of the active layer, and a material of the second sublayer is the same as a material of the pixel electrode.

13. The display panel of claim 12, wherein each of the dummy signal lines comprises the first sublayer and the second sublayer.

14. The display panel of claim 12, wherein each of the first dummy signal lines comprises a third sublayer and a fourth sublayer, and the fourth sublayer is located on the third sublayer, wherein a material of the third sublayer is the same as a material of the active layer, and a material of the fourth sublayer is the same as a material of the source and the drain.

15. The display panel of claim 6, wherein one of the dummy signal lines and the second signal lines comprises a same material as the pixel electrode, and the other comprises a same material as the source and the drain.

16. The display panel of claim 1, wherein a material of the contact structures comprises a same material as the pixel electrode.

17. The display panel of claim 1, wherein the contact structures are not located on a same horizontal axis.

18. The display panel of claim 1, wherein a sum of a length of the second signal line and a length of the dummy signal line corresponding to one of the contact structures is the same as a sum of a length of the second signal line and a length of the dummy signal line corresponding to another one of the contact structures.