CN-224216973-U - Display device

Abstract

The utility model provides a high-definition display device having a special-shaped display area and a high occupancy rate of the display area. The display device includes a substrate, a gate line driving circuit, a signal line driving circuit, a plurality of gate lines, and a plurality of video signal lines. The substrate has a display region in which a plurality of pixels are arranged, and a frame region surrounding the display region, and the display region has a polygonal shape having n vertices. The gate line driving circuit and the signal line driving circuit are located on the frame region. The plurality of gate lines extend from the gate line driving circuit to the display region. A plurality of video signal lines extend from the signal line driving circuit to the display region and intersect the plurality of gate lines. Each of the plurality of pixels includes a transistor having a first gate electrode, a semiconductor film over the first gate electrode, and a second gate electrode over the semiconductor film. Other features are described in detail in the specification.

Inventors

• ABE HIROYUKI
• SAITO REIHIKO

Assignees

• 株式会社日本显示器

Dates

Publication Date

20260508

Application Date

20250523

Priority Date

20240704

Claims (20)

1. 1.A display device is characterized by comprising: A substrate having a display region in which a plurality of pixels are arranged and a frame region surrounding the display region, the display region having a polygonal shape having n vertices, n being a natural number of 4 or more; A gate line driving circuit and a signal line driving circuit on the frame region; A plurality of gate lines extending from the gate line driving circuit to the display region, and A plurality of video signal lines extending from the signal line driving circuit to the display region and intersecting the plurality of gate lines, The plurality of pixels each include a transistor having a first gate electrode, a semiconductor film over the first gate electrode, and a second gate electrode over the semiconductor film, A part of the signal line driving circuit is sandwiched by the gate line driving circuit and the display region in a direction in which the plurality of gate lines extend, The plurality of gate lines are respectively provided with a lower layer gate line and an upper layer gate line, the lower layer gate line and the upper layer gate line are mutually overlapped, respectively exist in the same layer with the first gate electrode and the second gate electrode, and are respectively electrically connected with the first gate electrode and the second gate electrode, The lower layer gate line and the upper layer gate line of at least one gate line selected from the plurality of gate lines are electrically connected to each other between the display region and the portion of the signal line driving circuit.
2. 2. The display device of claim 1, wherein the display device comprises a display device, The contact surface of the lower layer gate line and the upper layer gate line is overlapped with one of the plurality of video signal lines.
3. 3. The display device of claim 1, wherein the display device comprises a display device, The contact surfaces of the lower layer gate lines and the upper layer gate lines are exposed from the plurality of video signal lines.
4. 4. The display device of claim 1, wherein the display device comprises a display device, The lower gate line of the at least one gate line is divided into two segment wirings between the display region and the portion of the signal line driving circuit, The two section wirings are electrically connected to each other via the upper layer gate line between the display region and the part of the signal line driving circuit.
5. 5. The display device of claim 4, wherein the display device comprises a display panel, The contact surface of the segment wiring and the upper layer gate line is overlapped with one of the plurality of video signal lines.
6. 6. The display device of claim 4, wherein the display device comprises a display panel, The contact surface between the segment wiring and the upper layer gate line is exposed from the plurality of video signal lines.
7. 7. The display device of claim 1, wherein the display device comprises a display device, The lower layer gate line and the upper layer gate line of the at least one gate line are also electrically connected to each other between the display region and the portion of the signal line driving circuit on the frame region on the opposite side with respect to the gate line driving circuit.
8. 8. The display device of claim 1, wherein the display device comprises a display device, The portion of the signal line driving circuit includes an analog switch.
9. 9. The display device of claim 1, wherein the display device comprises a display device, The gate line driving circuit is bent along a contour of the display region.
10. 10. The display device of claim 1, wherein the display device comprises a display device, The substrate has a polygonal shape with m vertices, m being a natural number of 5 or more.
11. 11. A display device is characterized by comprising: A substrate having a display region in which a plurality of pixels are arranged and a frame region surrounding the display region, the display region having a polygonal shape having n vertices, n being a natural number of 4 or more; a first gate line driving circuit and a second gate line driving circuit located on the frame region and sandwiching the display region; A signal line driving circuit on the frame region; A plurality of gate lines extending from the first gate line driving circuit to the second gate line driving circuit across the display region, and A plurality of video signal lines extending from the signal line driving circuit to the display region and intersecting the plurality of gate lines, The plurality of pixels each include a transistor having a first gate electrode, a semiconductor film over the first gate electrode, and a second gate electrode over the semiconductor film, A first portion of the signal line driving circuit is sandwiched by the first gate line driving circuit and the display region in a direction in which the plurality of gate lines extend, A second portion of the signal line driving circuit is sandwiched by the second gate line driving circuit and the display region in a direction in which the plurality of gate lines extend, The plurality of gate lines are respectively provided with a lower layer gate line and an upper layer gate line, the lower layer gate line and the upper layer gate line are mutually overlapped, respectively exist in the same layer with the first gate electrode and the second gate electrode, and are respectively electrically connected with the first gate electrode and the second gate electrode, The lower layer gate line and the upper layer gate line of at least one gate line selected from the plurality of gate lines are electrically connected to each other between the display region and the first portion and between the display region and the second portion.
12. 12. The display device of claim 11, wherein the display device comprises a display device, The contact surface of the lower layer gate line and the upper layer gate line is overlapped with one of the plurality of video signal lines.
13. 13. The display device of claim 11, wherein the display device comprises a display device, The contact surfaces of the lower layer gate lines and the upper layer gate lines are exposed from the plurality of video signal lines.
14. 14. The display device of claim 11, wherein the display device comprises a display device, The lower gate line of the at least one gate line is divided into a first section wiring crossing the display area, a second section wiring between the first section wiring and the first gate line driving circuit, and a third section wiring between the first section wiring and the second gate line driving circuit, The second and third segment wirings are electrically connected to the first segment wiring via the upper layer gate line between the display region and the first portion and between the display region and the second portion, respectively.
15. 15. The display device of claim 14, wherein the display device comprises a display device, The contact surface of the second section wiring and the upper layer gate line is overlapped with one of the plurality of video signal lines.
16. 16. The display device of claim 14, wherein the display device comprises a display device, The contact surface of the second section wiring and the upper layer gate line is exposed from the plurality of video signal lines.
17. 17. The display device of claim 14, wherein the display device comprises a display device, The contact surface of the third section wiring and the upper layer gate line is overlapped with one of the plurality of video signal lines.
18. 18. The display device of claim 14, wherein the display device comprises a display device, The contact surface of the third section wiring and the upper layer gate line is exposed from the plurality of video signal lines.
19. 19. The display device of claim 11, wherein the display device comprises a display device, The first portion and the second portion include analog switches.
20. 20. The display device of claim 11, wherein the display device comprises a display device, The first gate line driving circuit and the second gate line driving circuit are bent along an outline of the display region.

Description

Display device Technical Field One embodiment of the present utility model relates to a display device. For example, one of the embodiments of the present utility model relates to a display device that can be applied to a high-definition small-sized display device used for VR (virtual reality) goggles and the like. Background With recent technological developments in liquid crystal display devices and electroluminescent display devices, extremely high-definition display devices have been put on the market. One application for high definition display devices is VR goggles worn on the head of a user. Unlike the display device having a rectangular display area for a smart phone or a television monitor, the display device for VR goggles often has a display area having a shape close to a circle in order to reproduce a human visual field in an analog manner. For example, patent documents 1 and 2 disclose display devices each having a display region in which a part of a contour is formed of a curve and an octagonal display region. The non-rectangular display area is also referred to as a shaped display area. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2024-7220 Patent document 2 Japanese patent No. 6639866 Disclosure of utility model Technical problem to be solved One of the technical problems of one of the embodiments of the present utility model is to provide a display device having a new configuration. Another object of one of the embodiments of the present utility model is to provide a high-definition display device having a special-shaped display region and a high occupancy rate of the display region. Means for solving the technical problems One of the embodiments of the present invention is a display device. The display device includes a substrate, a gate line driving circuit, a signal line driving circuit, a plurality of gate lines, and a plurality of video signal lines. The substrate has a display region in which a plurality of pixels are arranged, and a frame region surrounding the display region, and the display region has a polygonal shape having n vertices. The gate line driving circuit and the signal line driving circuit are located on the frame region. The plurality of gate lines extend from the gate line driving circuit toward the display region. A plurality of video signal lines extend from the signal line driving circuit to the display region and intersect the plurality of gate lines. Each of the plurality of pixels includes a transistor having a first gate electrode, a semiconductor film over the first gate electrode, and a second gate electrode over the semiconductor film. A part of the signal line driving circuit is sandwiched between the gate line driving circuit and the display region in a direction in which the plurality of gate lines extend. The plurality of gate lines have a lower layer gate line and an upper layer gate line, respectively, which overlap each other, exist in the same layer as the first gate electrode and the second gate electrode, respectively, and are electrically connected to the first gate electrode and the second gate electrode, respectively. The lower layer gate line and the upper layer gate line of at least one gate line selected from the plurality of gate lines are electrically connected to each other between the display region and a part of the signal line driving circuit. n is a natural number of 5 or more. One of the embodiments of the present utility model is a display device. The display device includes a substrate, a first gate line driving circuit, a second gate line driving circuit, a signal line driving circuit, a plurality of gate lines, and a plurality of video signal lines. The substrate has a display region in which a plurality of pixels are arranged, and a frame region surrounding the display region, the display region having a polygonal shape having n vertices. The first gate line driving circuit and the second gate line driving circuit are located on the frame region, and the signal line driving circuit sandwiching the display region is located on the frame region. The plurality of gate lines extend from the first gate line driving circuit across the display region to the second gate line driving circuit. The plurality of video signal lines extend from the signal line driving circuit to the display region and intersect the plurality of gate lines. Each of the plurality of pixels includes a transistor having a first gate electrode, a semiconductor film over the first gate electrode, and a second gate electrode over the semiconductor film. The first portion of the signal line driving circuit is sandwiched between the first gate line driving circuit and the display region in a direction in which the plurality of gate lines extend. The second portion of the signal line driving circuit is sandwiched between the second gate line driving circuit and the display region in a direction in which the pluralit