Display device

Patent metadata

Field	Value
Publication number	US-2025182705-A1
Application number	US-202519044006-A
Country	US
Kind code	A1
Filing date	Feb 3, 2025
Priority date	May 17, 2022
Publication date	Jun 5, 2025
Grant date	—

Abstract

A display device includes light emitting pixels that emit light, photosensors each controlling a sensed current according to an incident light, and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data. In a sensing mode including a first frame period and a second frame period, the light emitting pixels include first sensing pixels that emit the light during the first frame period and second sensing pixels that do not emit the light during the first frame period, the photosensors include first photosensors and second photosensors, and a first distance between any one of the first sensing pixels and a first photosensor adjacent to the first sensing pixel among the first photosensors is greater than a second distance between the first sensing pixel and a second photosensor adjacent to the first sensing pixel among the second photosensors.

First claim

What is claimed is:

1 . A display device, comprising:
a plurality sub-pixels for emitting light; a plurality of photosensors, each of the plurality of photosensors for outputting a sensed current according to incident light; and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data, wherein the plurality of sub-pixels comprises a plurality of first pixels and a plurality of second pixels arranged in a first direction, wherein the plurality of photosensors comprises a first photosensor, wherein the first photosensor and the second pixels are arranged in a second direction crossing the first direction, and wherein the read-out circuit senses a sensed current of the first photosensor when the first pixels emits light and the second pixels does not emit light.

2 . The display device of claim 1 , wherein the plurality of photosensors further comprises a second photosensor,
wherein the first photosensor and the second photosensor are arranged in the first direction, and wherein the second photosensor and the first pixels are arranged in the second direction.

3 . The display device of claim 2 , wherein the read-out circuit senses a sensed current of the second photosensor when the first pixels does not emit light and the second pixels emits light.

4 . The display device of claim 1 , wherein the plurality of first pixels and the plurality of second pixels emits a first light.

5 . The display device of claim 4 , wherein the plurality of sub-pixels comprises a plurality of third pixels emitting a second light, and wherein each of the plurality of third pixels is between a corresponding first photosensor among the plurality of first photosensors and a corresponding second photosensor among the plurality of second photosensors.

6 . The display device of claim 5 , wherein an area of each of the plurality of third pixels is larger than an area of each of the plurality of first pixels and the plurality of second pixels.

7 . The display device of claim 4 , wherein the plurality of sub-pixels comprises a plurality of fourth pixels emitting a third light, and
wherein each of the plurality of fourth pixels is between a corresponding first photosensor among the plurality of first photosensors and a corresponding second photosensor among the plurality of second photosensors.

8 . The display device of claim 7 , wherein an area of each of the plurality of fourth pixels is larger than an area of each of the plurality of first pixels and the plurality of second pixels.

9 . The display device of claim 1 , wherein a first distance between a center of a first pixel among the plurality of first pixels and a center of a first photosensor adjacent to the first pixel among the plurality of first photosensors is greater than a second distance between the center of the first pixel and a center of a second photosensor adjacent to the first pixel among the second photosensors.

10 . The display device of claim 9 , wherein a third distance between a center of a second pixel adjacent to the second photosensor among the plurality of second pixels and the center of the second photosensor is greater than a fourth distance between the center of the second pixel and the center of the first photosensor.

11 . The display device of claim 10 , wherein the third distance is greater than the second distance, and the first distance is greater than the fourth distance.

12 . The display device of claim 9 , wherein a fifth distance between the center of the first pixel and the center of the second pixel is same as a distance between the center of the first pixel and a center of another first pixel adjacent to the first pixel among the plurality of first pixels, and
wherein the first pixel and the second pixel are adjacent to each other.

13 . The display device of claim 12 , wherein the fifth distance is same as a distance between the center of the second pixel and a center of another second pixel adjacent to the second pixel among the plurality of second pixels.

14 . The display device of claim 12 , wherein the fifth distance is greater than the first distance, and
wherein the fifth distance is smaller than the second distance.

15 . The display device of claim 14 , wherein a sixth distance between the center of the first photosensor and the center of the second photosensor is same as a distance between the center of the first photosensor and a center of another first photosensor adjacent to the first pixel among the plurality of first photosensors, and
wherein the first photosensor and second photosensor are adjacent to each other.

16 . The display device of claim 15 , wherein the sixth distance is smaller than a distance between the center of the second photosensor and a center of another second photosensor adjacent to the second photosensor.

17 . The display device of claim 15 , wherein the sixth distance is greater than the second distance, and
wherein the fifth distance is smaller than the first distance.

18 . An electronic device, comprising:
a display panel for displaying an image, wherein the display panel comprises: a plurality sub-pixels for emitting light; a plurality of photosensors, each of the plurality of photosensors for outputting a sensed current according to incident light; and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data, wherein the plurality of sub-pixels comprises a plurality of first pixels and a plurality of second pixels arranged in a first direction, wherein the plurality of photosensors comprises a first photosensor, wherein the first photosensor and the second pixels are arranged in a second direction crossing the first direction, and wherein the read-out circuit senses a sensed current of the first photosensor when the first pixels emits light and the second pixels does not emit light.

19 . The electronic device of claim 18 , wherein the display panel is used as a display screen of mobile phones, smartphones, tablet personal computers (PCs), mobile communication terminals, electronic notebooks, electronic books, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation devices, ultra mobile PCs (UMPCs), televisions, game machines, wrist watch-type electronic devices, head-mounted displays, monitors of personal computers, laptop computers, vehicle instrument boards, digital cameras, camcorders, external billboards, electric signs, medical devices, inspection devices, refrigerators, washing machines, or Internet of Things (IOT) devices.

20 . The electronic device of claim 18 , wherein the plurality of photosensors further comprises a second photosensor,
wherein the first photosensor and the second photosensor are arranged in the first direction, wherein the second photosensor and the first pixels are arranged in the second direction, and wherein the read-out circuit senses a sensed current of the second photosensor when the first pixels does not emit light and the second pixels emits light.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Bo Kwang
• Ahn Tae Kyung
• Kim Gun Hee
• Lee Dae Young

Classifications

• G06V40/1318 Primary

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G09G2360/14

  Detecting light within display terminals, e.g. using a single or a plurality of photosensors · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2300/0439

  Pixel structures · CPC title

• G09G2320/0214

  with crosstalk due to leakage current of pixel switch in active matrix panels · CPC title