CN-114256321-B - Display panel and display device

Abstract

The embodiment of the application provides a display panel and a display device, wherein the display panel is defined with a main display area and a secondary display area, and comprises pixel units, wherein the pixel units are arranged in the secondary display area and the main display area in an array mode, each pixel unit comprises a first color sub-pixel and a second color sub-pixel, a first power line is electrically connected with the first color sub-pixel, a second power line is electrically connected with the second color sub-pixel, a first power end is electrically connected with the first power line, and a second power end is electrically connected with the second power line. The embodiment of the application can improve or even eliminate the display difference between the auxiliary display area and the main display area.

Inventors

• LI HONGRUI
• XING RUBO
• MI LEI

Assignees

• 合肥维信诺科技有限公司
• 合肥维信诺科技有限公司

Dates

Publication Date

20260421

Application Date

20211227

Priority Date

20211227

Claims (15)

1. 1. A display panel defining a primary display area and a secondary display area, comprising: The pixel unit is arranged in the auxiliary display area and the main display area in an array manner and comprises a first color sub-pixel and a second color sub-pixel; A first power line electrically connected to the first color sub-pixel; A second power line electrically connected to the second color sub-pixel; the first power supply end is electrically connected with the first power line; the second power supply end is electrically connected with the second power line; the auxiliary display area comprises a substrate, a driving device layer and a light-emitting element layer which are stacked, wherein the light-emitting element layer comprises a first electrode layer, a light-emitting material layer and a second electrode layer, the driving device layer comprises pixel driving circuits, and each pixel driving circuit is electrically connected with anodes of light-emitting elements of a plurality of sub-pixels with the same color in the first electrode layer; the display panel further includes a signal line electrically connected to the pixel driving circuit; The driving device layer comprises a laminated metal conductive layer and a second transparent conductive layer, the signal line comprises a first section and a second section which are connected with each other, the first section is located in the metal conductive layer, the second section is located in the second transparent conductive layer, the orthographic projection of the first section on the plane of the display panel is overlapped with the orthographic projection of the pixel driving circuit on the plane of the display panel, and the orthographic projection of the second section on the plane of the display panel is not overlapped with the orthographic projection of the pixel driving circuit on the plane of the display panel.
2. 2. The display panel of claim 1, further comprising a third power line, the pixel unit further comprising a third color subpixel, the third color subpixel electrically connected to the first power terminal or the second power terminal through the third power line.
3. 3. The display panel of claim 1, wherein the pixel unit further comprises a third color sub-pixel, the display panel further comprising a third power line and a third power terminal, the third color sub-pixel being electrically connected to the third power terminal through the third power line.
4. 4. The display panel of claim 1, wherein the first power line includes a plurality of first sub power lines and at least one second sub power line, the first sub power lines extending in a first direction, the second sub power lines extending in a second direction, the first direction intersecting the second direction, the first sub power lines electrically connected to the first power terminal; The second power line comprises a plurality of third sub power lines and at least one fourth sub power line, the third sub power lines extend along the first direction, the fourth sub power lines extend along the second direction, and the third sub power lines are electrically connected with the second power end.
5. 5. The display panel of claim 4, wherein the light transmittance of the secondary display region is greater than that of the primary display region, the driving device layer comprises M pixel driving circuits, and the light emitting element layer comprises light emitting elements of N sub-pixels, wherein M is less than N and is a positive integer.
6. 6. The display panel according to claim 5, wherein the driving device layer or the light emitting element layer further includes a first transparent conductive layer, each of the pixel driving circuits is connected to anodes of light emitting elements of a plurality of the sub-pixels of the same color through a first transparent wire, and the first transparent wire is located in the first transparent conductive layer.
7. 7. The display panel of claim 6, wherein the pixel unit further comprises a third color sub-pixel, the second power line is electrically connected to both the second color sub-pixel and the third color sub-pixel, and the signal line comprises the second power line.
8. 8. The display panel according to claim 7, wherein the metal conductive layer includes a first metal layer, a second metal layer, and a third metal layer which are stacked, and an insulating layer interposed between any two metal layers.
9. 9. The display panel of claim 8, wherein the first and third sub power lines are located at the third metal layer, and the second and fourth sub power lines are located at any one of the first and second metal layers.
10. 10. The display panel of claim 8, wherein the metal conductive layer further comprises a fourth metal layer on a side of the third metal layer facing away from the second metal layer, the first and third sub-power lines being on the third metal layer, the second and fourth sub-power lines being on the fourth metal layer.
11. 11. The display panel according to claim 8, wherein the first transparent conductive layer is located in any one of the first metal layer, the second metal layer, the third metal layer, and the first electrode layer, or between any two of the first metal layer, the second metal layer, the third metal layer, and the first electrode layer.
12. 12. The display panel according to claim 11, wherein the second transparent conductive layer is located in any one of the first metal layer, the second metal layer, the third metal layer, and the first electrode layer or between any two of the first metal layer, the second metal layer, the third metal layer, and the first electrode layer, and wherein the first transparent conductive layer and the second transparent conductive layer are located in different film layers.
13. 13. The display panel of claim 12, wherein the first transparent conductive layer is in the same film layer as the first electrode layer, and the second transparent conductive layer is in the same film layer as the third metal layer.
14. 14. The display panel according to claim 5, wherein an orthographic projection of the pixel driving circuit on the substrate overlaps an orthographic projection of an anode of the light emitting element on the substrate.
15. 15. A display device comprising the display panel according to any one of claims 1-14.

Description

Display panel and display device Technical Field The application belongs to the technical field of display, and particularly relates to a display panel and a display device. Background In order to meet the needs of users, a display panel generally includes a main display area (or called a main screen) and a sub display area (or called a sub screen), where the main screen may be called a normal display area, and the sub screen may be called a functional area, and the functional area may implement functions such as under-screen image capturing or under-screen touch. Meanwhile, in order to realize a higher screen duty ratio, the application of the full screen is becoming wider and wider. The so-called full-screen, i.e. the functional area not only can realize functions such as under-screen image capturing or under-screen touch control, but also can display pictures. However, the inventors of the present application found that when the main display area and the sub display area simultaneously display pictures, there is a display difference between the main display area and the sub display area, resulting in poor display effect of the display panel. Disclosure of Invention The embodiment of the application provides a display panel and a display device, which can improve or even eliminate the display difference between a main display area and a secondary display area and improve the display effect of the display panel. In a first aspect, an embodiment of the present application provides a display panel, where the display panel defines a main display area and a sub-display area, and the display panel includes a pixel unit disposed in the sub-display area and the main display area in an array, where the pixel unit includes a first color sub-pixel and a second color sub-pixel, a first power line electrically connected to the first color sub-pixel, a second power line electrically connected to the second color sub-pixel, a first power terminal electrically connected to the first power line, and a second power terminal electrically connected to the second power line. According to an embodiment of the first aspect of the present application, the pixel unit further comprises a third color sub-pixel electrically connected to the first power supply terminal or the second power supply terminal through a third power supply line. According to any of the foregoing embodiments of the first aspect of the present application, the first color sub-pixel includes a green sub-pixel, one of the second color sub-pixel and the third color sub-pixel is a red sub-pixel, and the other is a blue sub-pixel. Therefore, when the display panel is switched from displaying a white picture to displaying a green pure picture, the current on the first power line connected with the green sub-pixel cannot be changed, so that the voltage drop or the voltage drop degree of the first power line connected with the green sub-pixel cannot be the same between the auxiliary screen and the main screen, and the display difference between the auxiliary screen and the main screen when the display panel displays the green pure picture is eliminated. In addition, since the second power supply terminal only supplies power to the red sub-pixel and the blue sub-pixel, and does not supply power to the red sub-pixel, the blue sub-pixel and the green sub-pixel at the same time, when the display panel is switched from displaying a white picture to displaying a red or blue pure picture, the variation of the current on the power supply line connected with the red sub-pixel and the blue sub-pixel is reduced, and the voltage drop difference between the power supply line connected with the red sub-pixel and the blue sub-pixel on the sub-panel and the main panel is reduced, thereby improving the display difference between the sub-panel and the main panel when the display panel displays the red or blue pure picture. According to any of the foregoing embodiments of the first aspect of the present application, the first color sub-pixel includes a blue sub-pixel, one of the second color sub-pixel and the third color sub-pixel is a red sub-pixel, and the other is a green sub-pixel. Therefore, when the display panel is switched from displaying a white picture to displaying a blue pure picture, the current on the first power line connected with the blue sub-pixel cannot be changed, so that the voltage drop or the voltage drop degree of the first power line connected with the blue sub-pixel cannot be the same between the auxiliary screen and the main screen, and the display difference between the auxiliary screen and the main screen when the display panel displays the blue pure picture is eliminated. In addition, since the second power supply terminal only supplies power to the red sub-pixel and the green sub-pixel, and does not supply power to the red sub-pixel, the blue sub-pixel and the green sub-pixel at the same time, when the display panel is switched from displaying a white pic