Display device and driving tool

Patent metadata

Field	Value
Publication number	US-12507530-B2
Application number	US-202318578166-A
Country	US
Kind code	B2
Filing date	Apr 3, 2023
Priority date	Apr 3, 2023
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A display device includes a substrate and a plurality of sub-pixels arranged in an array on the substrate, and each of the plurality of sub-pixels includes: a drive unit including a driving transistor and a storage capacitor that are electrically connected; light-emitting devices including a pixel opening region, an orthographic projection of the pixel opening region on the substrate and an orthographic projection of the driving transistor on the substrate are at least partially non overlapping, and the orthographic projection of the pixel opening region on the substrate and an orthographic projection of the storage capacitor on the substrate are at least partially non overlapping; wherein the display device is configured as that, after continuously displaying a white picture at room temperature for two hours, a temperature rise of a display surface of the display device is less than or equal to 15° C.

First claim

The invention claimed is:

1 . A display device comprising a substrate and a plurality of sub-pixels arranged in an array on the substrate,
wherein each of the plurality of sub-pixels comprises: a drive unit located at one side of the substrate, wherein the drive unit comprises a driving transistor and a storage capacitor that are electrically connected; and light-emitting devices electrically connected to the drive unit, wherein each of the light-emitting devices comprises a pixel opening region, an orthographic projection of the pixel opening region on the substrate and an orthographic projection of the driving transistor on the substrate are at least partially non overlapping, and the orthographic projection of the pixel opening region on the substrate and an orthographic projection of the storage capacitor on the substrate are at least partially non overlapping, wherein the display device is configured as that, after continuously displaying a white picture at room temperature for two hours, a temperature rise of a display surface of the display device is less than or equal to 15° C., wherein a luminance of a light source of the display device is greater than or equal to 500 nit, wherein the light-emitting devices comprise a plurality of light-emitting device groups, and each of the plurality of light-emitting device groups comprises a first light-emitting device, a second light-emitting device and a third light-emitting device, and wherein a ratio range of areas of the pixel opening regions of the first light-emitting device, the second light-emitting device and the third light-emitting device is (1):(1˜2.5):(1.5˜3.5).

2 . The display device according to claim 1 , wherein the driving transistor comprises an active layer, and the orthographic projection of the pixel opening region on the substrate and an orthographic projection of the active layer of the driving transistor on the substrate are at least partially non overlapping.

3 . The display device according to claim 1 , wherein the driving transistor comprises a gate, and the orthographic projection of the pixel opening region on the substrate and an orthographic projection of the gate of the driving transistor on the substrate are at least partially non overlapping.

4 . The display device according to claim 3 , wherein
the first light-emitting device and the second light-emitting device are located in the same row and are arranged alternately, and a shape formed by connecting lines of geometric centers of the pixel opening regions of the first light-emitting device, the second light-emitting device and the third light-emitting device is a triangle; or the first light-emitting device, the second light-emitting device and the third light-emitting device are arranged in sequence and are located in the same row, the pixel opening region of the second light-emitting device comprises two parts that are not connected, the geometric centers of the pixel opening regions of the first light-emitting device, the second light-emitting device and the third light-emitting device are collinear.

5 . The display device according to claim 4 , wherein the orthographic projection of the pixel opening region of the light-emitting device on the substrate and the orthographic projection of the gate of the driving transistor on the substrate are roughly non overlapping.

6 . The display device according to claim 5 , wherein a plurality of light-emitting device groups extending along a first direction form a row, the gates of the driving transistors are all located between two adjacent rows of the light-emitting device groups, an arrangement direction of the gates of the driving transistors electrically connected to the light-emitting device groups of the same row is consistent with the first direction.

7 . The display device according to claim 5 , wherein under the condition that the first light-emitting device and the second light-emitting device are located in the same row and are arranged alternately,
a range of a percentage of an area of a region, where the orthographic projection of the pixel opening region of the light-emitting device on the substrate overlaps with an orthographic projection of other regions of the driving transistor except for the gate on the substrate, to an area of the pixel opening region is 17%˜37%; a range of a percentage of an area of a region, where the orthographic projection of the pixel opening region of the light-emitting device on the substrate overlaps with an orthographic projection of the storage capacitor on the substrate, to the area of the pixel opening region is 17%˜37%.

8 . The display device according to claim 5 , wherein under the condition that the first light-emitting device, the second light-emitting device and the third light-emitting device are arranged in sequence and are located in the same row, and the pixel opening region of the second light-emitting device comprises two parts that are not connected,
a range of a percentage of an area of a region, where the orthographic projection of the pixel opening region of the light-emitting device on the substrate overlaps with an orthographic projection of other regions of the driving transistor except for the gate on the substrate, to an area of the pixel opening region is 24%˜44%; a range of a percentage of an area of a region, where the orthographic projection of the pixel opening region of the light-emitting device on the substrate overlaps with an orthographic projection of the storage capacitor on the substrate, to the area of the pixel opening region is 24%˜44%.

9 . The display device according to claim 4 , wherein the orthographic projections of the pixel opening regions of a part of the light-emitting devices on the substrate partially overlap with the orthographic projection of the gate of the driving transistor on the substrate, and the orthographic projections of the pixel opening regions of another part of the light-emitting devices on the substrate and the orthographic projection of the gate of the driving transistor on the substrate are roughly non overlapping.

10 . The display device according to claim 9 , wherein under the condition that the first light-emitting device and the second light-emitting device are located in the same row and are arranged alternately,
an orthographic projection of the pixel opening region of the third light-emitting device on the substrate partially overlaps with the orthographic projection of the gate of the driving transistor on the substrate, and the orthographic projections of the pixel opening regions of the first light-emitting device and the second light-emitting device on the substrate and the orthographic projection of the gate of the driving transistor on the substrate are roughly non overlapping; the orthographic projection of the gates of a part of the driving transistors on the substrate are located in a region between the orthographic projections of the pixel opening regions of the first light-emitting device and the second light-emitting device on the substrate.

11 . The display device according to claim 9 , wherein under the condition that the first light-emitting device, the second light-emitting device and the third light-emitting device are arranged in sequence and are located in the same row, and the pixel opening region of the second light-emitting device comprises two parts that are not connected,
an orthographic projection of the pixel opening region of the third light-emitting device on the substrate partially overlaps with the orthographic projection of the gate of the driving transistor on the substrate, an orthographic projection of the pixel opening region of the first light

Assignees

• Chongqing Boe Display Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Lv Tong
• Gao Dongyu
• Tong Xunfei
• Nie Han
• Zhao Gen
• Deng Yingxiong
• Deng Chengji
• He Liu
• Huang Jingwei
• Chen Jia
• Jiang Xingzong
• Yang Chunmei
• Du Ling

Classifications

• G09G2320/043

  Preventing or counteracting the effects of ageing · CPC title

• G09G2320/041

  Temperature compensation · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title