KR-20260066041-A - Display board and display device

Abstract

The present application relates to a display substrate and a display device. The display substrate comprises at least one first display area and a second display area located on at least one side of the at least one first display area—the light transmittance of the second display area is smaller than the light transmittance of the at least one first display area—and a plurality of first subpixels located in the at least one first display area—the first subpixels include a first light-emitting element and a first pixel circuit configured to drive the first light-emitting element to emit light, and the first pixel circuit includes a plurality of transistors in which at least one transistor is an oxide transistor. By setting it this way, the light transmittance of the first display area can be improved.

Inventors

• 쉬, 촨샹
• 수, 스
• 야오, 치
• 위안, 광차이

Assignees

• 보에 테크놀로지 그룹 컴퍼니 리미티드

Dates

Publication Date

20260512

Application Date

20240814

Priority Date

20230908

Claims (20)

1. At least one first display area, A second display area located on at least one side of the at least one first display area - the light transmittance of the second display area is smaller than the light transmittance of the at least one first display area -, and A plurality of first subpixels located in at least one first display area - the first subpixels include a first light-emitting element and a first pixel circuit configured to drive the first light-emitting element to emit light, and the first pixel circuit includes a plurality of transistors in which at least one transistor is an oxide transistor. including, Display board.
2. In paragraph 1, The above plurality of transistors are oxide transistors and do not include polycrystalline silicon transistors, Display board.
3. In paragraph 1, The plurality of transistors above include oxide transistors and polycrystalline silicon transistors, and the number of polycrystalline silicon transistors is greater than the number of oxide transistors. Display board.
4. In paragraph 1, The first pixel circuit above includes a driving transistor, and the driving transistor is a polycrystalline silicon transistor. Display board.
5. In paragraph 4, The channel length of the above driving transistor is greater than or equal to 20 µm and also less than or equal to 40 µm, Display board.
6. In paragraph 1, The above-mentioned first pixel circuit includes a first circuit transistor, a second circuit transistor, and a third circuit transistor, and The first electrode of the first circuit transistor, the gate of the third circuit transistor, and the second electrode of the second circuit transistor are connected to each other, The first electrode of the second circuit transistor is connected to the second electrode of the third circuit transistor, and The above third circuit transistor is a driving transistor, Display board.
7. In paragraph 6, The first circuit transistor and the second circuit transistor are oxide transistors. Display board.
8. In paragraph 6, The above-mentioned first pixel circuit further includes a power line, a first initialization signal line, a second initialization signal line, and a data line, and The first pixel circuit above includes a storage capacitor, a fourth circuit transistor, a fifth circuit transistor, a sixth circuit transistor, and a seventh circuit transistor, and The first electrode of the first circuit transistor is connected to the first electrode plate of the storage capacitor, and the second electrode of the first circuit transistor is connected to the first initialization signal line. The above power line is connected to the second electrode plate of the storage capacitor and the first electrode of the fifth circuit transistor, the second electrode of the fifth circuit transistor is connected to the first electrode of the third circuit transistor and the second electrode of the fourth circuit transistor, and the first electrode of the fourth circuit transistor is connected to the data line. The first electrode of the second circuit transistor is connected to the first electrode of the sixth circuit transistor, the second electrode of the sixth circuit transistor is connected to the second electrode of the seventh circuit transistor, and the first electrode of the seventh circuit transistor is connected to the second initialization signal line. Display board.
9. In paragraph 8, The above-mentioned third circuit transistor is a polycrystalline silicon transistor, and The first circuit transistor, the second circuit transistor, the fourth circuit transistor, the fifth circuit transistor, the sixth circuit transistor, and the seventh circuit transistor are all oxide transistors. Display board.
10. In Paragraph 9, The third circuit transistor comprises an active layer, a gate located on one side of the active layer, and a first electrode of the third circuit transistor and a second electrode of the third circuit transistor located on one side of the gate far from the active layer. The first electrode of the third circuit transistor and the second electrode of the third circuit transistor are connected to the active layer, The above display substrate further includes a first light-blocking layer, wherein the first light-blocking layer is located on one side far from the gate of the active layer, and The orthographic projection of the third circuit transistor on the display substrate is located within the orthographic projection of the first light-blocking layer on the display substrate. Display board.
11. In Paragraph 9, The first light-emitting element comprises an anode, a light-emitting layer, and a cathode that are sequentially spaced apart from the first pixel circuit, and The orthographic projection of the third circuit transistor on the display substrate is located within the orthographic projection of the anode on the display substrate. Display board.
12. In paragraph 8, The above display substrate includes a second light-blocking layer, and The orthographic projection of the first circuit transistor, the second circuit transistor, the fourth circuit transistor, the fifth circuit transistor, the sixth circuit transistor, and the seventh circuit transistor on the display substrate is located within the orthographic projection of the second light-blocking layer on the display substrate. Display board.
13. In paragraph 8, The first electrode and the second electrode of the above storage capacitor are both transparent conductive materials, Display board.
14. In paragraph 8, The above display substrate is A gate line connected to the gate of the second circuit transistor and the gate of the fourth circuit transistor, A light emission control signal line connected to the gate of the fifth circuit transistor and the gate of the sixth circuit transistor, and A reset control signal line further comprising the gate of the first circuit transistor and the gate of the seventh circuit transistor. Display board.
15. In Paragraph 14, At least one of the above power line, the above first initialization signal line, the above second initialization signal line, the above data line, the above gate line, the above light emission control signal line and the above reset control signal line is a transparent conductive material, Display board.
16. In paragraph 15, The above power line, the first initialization signal line, the second initialization signal line, the data line, the gate line, the light emission control signal line, and the reset control signal line are all made of a transparent conductive material. Display board.
17. In Paragraph 14, The first light-emitting element comprises an anode, a light-emitting layer, and a cathode that are sequentially spaced apart from the first pixel circuit, and The orthographic projection on the display substrate of at least some sections of the power line, the first initialization signal line, the second initialization signal line, the data line, the gate line, the light emission control signal line, and the reset control signal line overlaps with the orthographic projection of the anode on the display substrate, and The above at least a portion of the section overlapping with the anode is a metallic material, and the remaining portion is a transparent conductive material. Display board.
18. In any one of paragraphs 1 through 17, The above display substrate further includes a plurality of second subpixels located in the second display area, and the second subpixel includes a second light-emitting element and a second pixel circuit configured to drive the second light-emitting element to emit light. The second pixel circuit comprises a plurality of transistors, and the plurality of transistors of the second pixel circuit comprise oxide transistors and/or polycrystalline silicon transistors, Display board.
19. In Paragraph 18, The above display substrate further includes a transition display area located between the at least one first display area and the second display area, and the transition display area surrounds the at least one first display area. The display substrate further includes a plurality of third subpixels located in the transition display area, and the third subpixel includes a third light-emitting element and a third pixel circuit configured to drive the third light-emitting element to emit light. The above third pixel circuit includes a power line, a first initialization signal line, a second initialization signal line, a data line, a gate line, a light emission control signal line, and a reset control signal line, and The power line, the first initialization signal line, the second initialization signal line, the data line, the gate line, the light emission control signal line, and the reset control signal line located in the third pixel circuit are metal wires, and The third pixel circuit uses the same transistor as the first pixel circuit, Display board.
20. In Paragraph 19, The pixel density of the plurality of second subpixels is greater than the pixel density of the plurality of first subpixels, and the pixel density of the plurality of second subpixels is greater than the pixel density of the plurality of third subpixels, or, The pixel density of the plurality of second subpixels is greater than the pixel density of the plurality of third subpixels, and the pixel density of the plurality of third subpixels is greater than the pixel density of the plurality of second subpixels. Display board.

Description

Display board and display device This application relates to the field of displays, and in particular to display substrates and display devices. OLED (Organic Light-Emitting Diode) display structures have become the mainstream display architecture due to their high color gamut, thinness, and flexibility. Currently, increasing screen-to-body ratio has become one of the key themes in mobile phone innovation, and designs such as notch displays, teardrop displays, water droplet displays, and punch-hole displays are all efforts to reduce the space occupied by the front camera. Under-display cameras (abbreviated as UDC) are an essential element of the full-screen era. The main reason why the front camera cannot be placed beneath the screen is that driving circuits and wiring do not transmit light, resulting in too low transmittance across the entire screen; therefore, placing the camera beneath the screen prevents it from receiving light from outside the screen. The object of the present application is to provide a display substrate and a display device capable of improving the light transmittance of a first display area. According to the first aspect of an embodiment of the present application, a display substrate is provided, said display substrate, said display substrate, At least one first display area and a second display area located on at least one side of the at least one first display area - the light transmittance of the second display area is smaller than the light transmittance of the at least one first display area -, and A plurality of first subpixels located in at least one first display area - the first subpixels include a first light-emitting element and a first pixel circuit configured to drive the first light-emitting element to emit light, and the first pixel circuit includes a plurality of transistors in which at least one transistor is an oxide transistor. In some embodiments, the plurality of transistors are oxide transistors and do not include polycrystalline silicon transistors. In some embodiments, the plurality of transistors includes oxide transistors and polycrystalline silicon transistors, and the number of polycrystalline silicon transistors is greater than the number of oxide transistors. In some embodiments, the first pixel circuit includes a driving transistor which is a polycrystalline silicon transistor. In some embodiments, the length of the channel of the driving transistor is greater than or equal to 20 µm and also less than or equal to 40 µm. In some embodiments, the first pixel circuit includes a first circuit transistor, a second circuit transistor, and a third circuit transistor, and the first electrode of the first circuit transistor, the gate of the third circuit transistor, and the second electrode of the second circuit transistor are connected to each other, and the first electrode of the second circuit transistor is connected to the second electrode of the third circuit transistor, and the third circuit transistor is a driving transistor. In some embodiments, the first circuit transistor and the second circuit transistor are oxide transistors. In some embodiments, the first pixel circuit further includes a power line, a first initialization signal line, a second initialization signal line, and a data line, and The first pixel circuit comprises a storage capacitor, a fourth circuit transistor, a fifth circuit transistor, a sixth circuit transistor, and a seventh circuit transistor, wherein the first electrode of the first circuit transistor is connected to the first electrode plate of the storage capacitor, the second electrode of the first circuit transistor is connected to the first initialization signal line, the power line is connected to the second electrode plate of the storage capacitor and the first electrode of the fifth circuit transistor, the second electrode of the fifth circuit transistor is connected to the first electrode of the third circuit transistor and the second electrode of the fourth circuit transistor, the first electrode of the fourth circuit transistor is connected to the data line, the first electrode of the second circuit transistor is connected to the first electrode of the sixth circuit transistor, the second electrode of the sixth circuit transistor is connected to the second electrode of the seventh circuit transistor, and the first electrode of the seventh circuit transistor is connected to the second initialization signal line. In some embodiments, the third circuit transistor is a polycrystalline silicon transistor, and the first circuit transistor, the second circuit transistor, the fourth circuit transistor, the fifth circuit transistor, the sixth circuit transistor, and the seventh circuit transistor are all oxide transistors. In some embodiments, the third circuit transistor comprises an active layer, a gate located on one side of the active layer, and a first electrode of the third circuit transistor and a second electrode of t