CN-121982989-A - Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a light emitting element, a pixel circuit and a driving circuit, wherein the driving circuit provides control signals for the pixel circuit, the pixel circuit is electrically connected with the light emitting element, the display panel comprises a first area and a second area, the pixel circuit comprises a first pixel circuit located in the first area and a second pixel circuit located in the second area, the length of the first pixel circuit in a first direction is smaller than that of the second pixel circuit in the first direction, the driving circuit comprises a first driving circuit, the first driving circuit comprises a plurality of first shift registers cascaded along a second direction, the first direction and the second direction are intersected, and the first shift registers at least partially overlap with the light emitting element in the second direction. According to the technical scheme, the frame width of the display panel in the first direction can be reduced, and even the display panel can be designed to be frame-free in the first direction.

Inventors

• XIE MENGMENG
• WU TIANYI
• JIANG WENXIN

Assignees

• 天马新型显示技术研究院(厦门)有限公司

Dates

Publication Date

20260505

Application Date

20240816

Claims (20)

1. 1. A display panel, comprising: A light emitting element; a pixel circuit and a driving circuit, the driving circuit is connected with the pixel circuit, and the pixel circuit is connected with the light emitting element; the pixel circuit comprises a driving transistor, a first light-emitting control transistor and a second light-emitting control transistor, wherein a first pole of the driving transistor is connected with a first power end through the first light-emitting control transistor, and a second pole of the driving transistor is connected with the light-emitting element through the second light-emitting control transistor; the display panel comprises a first area and a second area distributed along a first direction, and the pixel circuit comprises a first pixel circuit positioned in the first area and a second pixel circuit positioned in the second area; The driving circuit comprises a first driving circuit comprising a plurality of first shift registers cascaded along a second direction, the first direction intersecting the second direction, wherein, The display panel satisfies at least one of: In the first pixel circuit, a distance between the first light emission control transistor and the driving transistor in a second direction is D11, and a distance between the second light emission control transistor and the driving transistor in the second direction is D12; In the second pixel circuit, a distance between the first light emission control transistor and the driving transistor in the second direction is D21, and a distance between the second light emission control transistor and the driving transistor in the second direction is D22; i D11-D12I > D21-D22I, or In the first pixel circuit, a distance of the first light emission control transistor and the second light emission control transistor in the first direction is D51, and a distance of the first light emission control transistor and the second light emission control transistor in the second direction is D52; In the second pixel circuit, a distance of the first light emission control transistor and the second light emission control transistor in the first direction is D61, and a distance of the first light emission control transistor and the second light emission control transistor in the second direction is D62; 0≤D51 < D61, and/or D52> D62≥0.
2. 2. The display panel of claim 1, wherein the display panel comprises, In the first pixel circuit, the first light emission control transistor and the second light emission control transistor are arranged in the second direction.
3. 3. The display panel of claim 2, wherein the display panel comprises, In the first pixel circuit, a second light emission control transistor is located on a side of the first light emission control transistor away from the driving transistor in the second direction.
4. 4. The display panel of claim 2, wherein the display panel comprises, In the first pixel circuit, the driving transistor, the first light emission control transistor, and the second light emission control transistor are sequentially arranged in the second direction.
5. 5. The display panel of claim 2, wherein the display panel comprises, In the first pixel circuit, the first light emission control transistor and the second light emission control transistor are disposed opposite to each other in the second direction.
6. 6. The display panel of claim 5, wherein the display panel comprises, In the first pixel circuit, the central lines of the active regions of both the first light emission control transistor and the second light emission control transistor in the second direction coincide or nearly coincide.
7. 7. The display panel of claim 1, wherein the display panel comprises, In the second pixel circuit, the first light emission control transistor and the second light emission control transistor are arranged in the first direction.
8. 8. The display panel of claim 7, wherein the display panel comprises, In the second pixel circuit, the center lines of the respective active regions of the first light emission control transistor and the second light emission control transistor in the second direction do not coincide.
9. 9. The display panel of claim 7, wherein the display panel comprises, In the second pixel circuit, the first light emission control transistor and the second light emission control transistor are connected to the same light emission control signal line.
10. 10. The display panel of claim 7, wherein the display panel comprises, In the second pixel circuit, the first light emission control transistor and the second light emission control transistor are disposed opposite to each other in the first direction.
11. 11. The display panel of claim 10, wherein the display panel comprises, In the second pixel circuit, the central lines of the active regions of the first light emission control transistor and the second light emission control transistor in the first direction coincide or nearly coincide.
12. 12. The display panel of claim 7, wherein the display panel comprises, In the second pixel circuit, the first light emission control transistor and the second light emission control transistor are located on the same side of the driving transistor in the second direction.
13. 13. The display panel of claim 1, wherein the display panel comprises, D11< D12, and/or d21=d22.
14. 14. The display panel of claim 1, wherein the display panel comprises, D51=0。
15. 15. The display panel of claim 1, wherein the display panel comprises, D51>0。
16. 16. The display panel of claim 1, wherein the display panel comprises, D62=0。
17. 17. The display panel of claim 1, wherein the display panel comprises, The driving transistor at least comprises a first sub-transistor and a second sub-transistor, wherein the grid electrode of the first sub-transistor is connected with the grid electrode of the second sub-transistor, the first pole of the first sub-transistor is connected with the first pole of the second sub-transistor, and the second pole of the first sub-transistor is connected with the second pole of the second sub-transistor.
18. 18. The display panel of claim 17, wherein the display panel comprises, In the first pixel circuit, the first sub-transistor and the second sub-transistor are arranged along the second direction; in the second pixel circuit, the first sub-transistor and the second sub-transistor are arranged along the first direction.
19. 19. The display panel of claim 1, wherein the display panel comprises, The light-emitting element comprises a first light-emitting element and a second light-emitting element which emit light with different colors, wherein the wavelength of the emitted light of the first light-emitting element is larger than that of the emitted light of the second light-emitting element; The pixel circuit includes a drive transistor, wherein, The channel width-to-length ratio of the driving transistor in the pixel circuit corresponding to the first light emitting element is A1; the channel width-to-length ratio of the driving transistor in the pixel circuit corresponding to the second light-emitting element is A2; Wherein A1> A2.
20. 20. The display panel of claim 19, wherein the display panel comprises, The channel width-to-length ratio of the driving transistor in the first pixel circuit corresponding to the first light emitting element is equal to the channel width-to-length ratio of the driving transistor in the second pixel circuit corresponding to the first light emitting element, and/or, The channel width-to-length ratio of the driving transistor in the first pixel circuit corresponding to the second light emitting element is equal to the channel width-to-length ratio of the driving transistor in the second pixel circuit corresponding to the second light emitting element.

Description

Display panel and display device The application relates to a patent division application of a display panel and a display device, wherein the application date is 2024, 8, 16 and the application number is 202411127690.7. Technical Field The present application relates to the field of display technologies, and in particular, to a display panel and a display device. Background The display panel is a main component of the display device to realize an image display function. In the display panel, a light emitting element for image display is connected to a pixel circuit, and the pixel circuit is connected to a driving circuit. The pixel circuit may control the light emitting element to perform image display in response to control of the driving circuit. In a conventional display panel, a driving circuit is generally disposed in a frame region of the display panel. Therefore, in the conventional display panel, a frame area is required to be disposed at one side of the display panel for disposing the driving circuit, resulting in the display panel having a frame area with a large width. Disclosure of Invention In view of the foregoing, the present application provides a display panel and a display device, so as to achieve the purpose of narrow frame or even no frame. The specific scheme is as follows: the first aspect of the present application provides a display panel, comprising: A light emitting element; The driving circuit provides control signals for the pixel circuit, and the pixel circuit is electrically connected with the light-emitting element; The display panel comprises a first area and a second area, wherein the pixel circuit comprises a first pixel circuit positioned in the first area and a second pixel circuit positioned in the second area, and the length of the first pixel circuit in a first direction is smaller than that of the second pixel circuit in the first direction; the driving circuit comprises a first driving circuit comprising a plurality of first shift registers cascaded along a second direction, the first direction intersecting the second direction, In the second direction, the first shift register at least partially overlaps the light emitting element. A second aspect of the present application provides a display device including the above display panel. With the technical scheme, in the display panel and the display device provided by the application, since the size of the first pixel circuit in the first direction is smaller than that of the second pixel circuit in the first direction, the layout space occupied by the first pixel circuit in the first direction can be reduced, so that the space for laying out the driving circuit can be saved in the display area of the display panel, and the first shift register of the first driving circuit in the driving circuit can be at least partially overlapped with the light emitting element in the second direction, so that part or all of the driving circuit can be laid out in the display area. Therefore, the technical scheme of the application can reduce the frame width of the display panel in the first direction, and even realize the frame-free design of the display panel in the first direction. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings required for the description of the embodiments or the prior art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort to those skilled in the art. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and therefore should not be construed as limiting the application, but rather as limiting the scope of the application, so that any structural modifications, proportional changes, or dimensional adjustments should fall within the scope of the application without affecting the efficacy or achievement thereof. Fig. 1 is a top view of a display panel according to an embodiment of the present application; FIG. 2 is a schematic diagram of a circuit connection relationship of the first driving circuit; fig. 3a is a schematic diagram of a circuit connection relationship of a pixel circuit according to an embodiment of the present application; fig. 3b is a schematic diagram of a circuit connection relationship of a second pixel circuit according to an embodiment of the present application; Fig. 4 is a layout of a driving transistor according to an embodiment of the present application; fig. 5 is a layout of a driving transistor in a first pixel circuit according to an embodiment of the present application; Fig. 6 is a layout of a driving transistor in a second pixel circuit according to an embodiment of the present application; FIG. 7 is a layout of a pixel circuit i