Display device

Patent metadata

Field	Value
Publication number	US-12213357-B2
Application number	US-202217813993-A
Country	US
Kind code	B2
Filing date	Jul 21, 2022
Priority date	Sep 29, 2021
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

A display device includes a display panel having a display area and a non-display area. The display panel includes a pixel disposed in the display area and including a light emitting element and a pixel driving circuit electrically connected with the light emitting element, a sensor disposed in the display area and including a photo sensing element and a sensor driving circuit electrically connected with the photo sensing element, a data line electrically connected with the pixel and extended along a first direction, a scan line electrically connected with the pixel and extended along a second direction intersecting the first direction, and a readout line including a first readout portion in the display area. The first readout portion is electrically connected with the sensor and extended along the second direction in the display area.

First claim

What is claimed is:

1. A display device, comprising:
a display panel in which a display area and a non-display area are defined,
wherein the display panel includes:
a plurality of pixels including a first pixel disposed in the display area and including a light emitting element and a pixel driving circuit electrically connected with the light emitting element;
a plurality of sensors including a first sensor disposed in the display area and including a photo sensing element and a sensor driving circuit electrically connected with the photo sensing element;
a data line electrically connected with the first pixel and extended along a first direction;
a plurality of scan lines including a first scan line electrically connected with the first pixel and the first sensor and extended along a second direction intersecting the first direction;
a readout line including a first readout portion in the display area, wherein the first readout portion is electrically connected with the first sensor and is extended along the second direction in the display area and beyond a boundary between the display area and the non-display area; and
a connection pattern connected to the sensor driving circuit through a first contact part and connected to the first readout portion through a second contact part, wherein the first contact part and the second contact part are spaced apart in the first direction.

2. The display device of claim 1 ,
wherein the first readout portion of the readout line does not overlap the plurality of scan lines in the display area, and
wherein the first readout portion of the readout line and the plurality of scan lines are parallel in the display area.

3. The display device of claim 1 ,
wherein the first readout portion of the readout line is extended along the second direction from the display area to the non-display area,
wherein the readout line further includes:
a second readout portion disposed in the non-display area and connected to the first readout portion at the non-display area, and
wherein the second readout portion is extended along the first direction from the non-display area to the first readout portion.

4. The display device of claim 3 ,
wherein the first readout portion and the second readout portion are arranged on different layers from each other.

5. The display device of claim 3 ,
wherein the sensor driving circuit includes:
a reset transistor including a first electrode configured to receive a reset signal, a second electrode connected with a first sensing node, and a third electrode configured to receive a reset control signal;
an amplification transistor including a first electrode configured to receive a sensing driving voltage, a second electrode connected with a second sensing node, and a third electrode connected with the first sensing node; and
an output transistor including a first electrode connected with the second sensing node, a second electrode connected with the readout line, and a third electrode configured to receive an output control signal.

6. The display device of claim 5 ,
wherein the connection pattern electrically connects the output transistor and the readout line with each other.

7. The display device of claim 6 ,
wherein the connection pattern is extended along the first direction, and
wherein the connection pattern is disposed on a layer different from the first readout portion.

8. The display device of claim 6 ,
wherein the connection pattern and the second readout portion are disposed on the same layer.

9. The display device of claim 1 , further comprising:
an input sensing layer disposed on the display panel and including a first conductive layer and a second conductive layer,
wherein a portion of the readout line is included in the first conductive layer or the second conductive layer.

10. The display device of claim 9 ,
wherein the first readout portion of the readout line is extended along the second direction from the display area to the non-display area,
wherein the readout line further includes:
a second readout portion disposed in the non-display area and connected to the first readout portion at the non-display area,
wherein the second readout portion is extended along the first direction from the non-display area to the first readout portion, and
wherein the second readout portion is included in the first conductive layer or the second conductive layer.

11. The display device of claim 10 ,
wherein the display panel further includes:
a connection electrode connected with each of the first readout portion and the second readout portion.

12. The display device of claim 1 ,
wherein the plurality of scan lines include an initialization scan line, a compensation scan line, and a write scan line, connected with the first pixel, and
wherein the first readout portion of the readout line does not overlap each of the initialization scan line, the compensation scan line, and the write scan line.

13. The display device of claim 1 ,
wherein the pixel driving circuit includes:
a first transistor selectively connecting a first driving voltage line configured to receive a first driving voltage and the light emitting element;
a second transistor selectively connecting the data line and a first electrode of the first transistor;
a third transistor selectively connecting a second electrode of the first transistor and a first node, wherein the third transistor is configured to receive a first scan signal;
a fourth transistor selectively connecting a first initialization voltage line through which a first initialization voltage is applied and the first node, wherein the fourth transistor is configured to receive a second scan signal; and
a seventh transistor selectively connecting a second initialization voltage line through which a second initialization voltage is applied and an anode of the light emitting element, wherein the seventh transistor is configured to receive a third scan signal.

14. The display device of claim 13 ,
wherein the second initialization voltage line and the first readout portion of the readout line disposed in the display area are disposed on the same layer.

15. A display device, comprising:
a display panel in which a display area and a non-display area are defined,
wherein the display panel includes:
a pixel disposed in the display area and including a light emitting element and a pixel driving circuit electrically connected with the light emitting element;
a sensor disposed in the display area and including a photo sensing element and a sensor driving circuit electrically connected with the photo sensing element;
a readout line electrically connected with the sensor and including a first readout portion in the display area and a second readout portion in the non-display area, wherein the first readout portion and the second readout portion are extended along different directions from each other, and wherein the first readout portion in the display area and the second readout portion in the non-display area are arranged on different layers from each other;
a scan line electrically connected with the pixel and the sensor and extended along the same direction as an extending direction of the first readout portion; and
a connection pattern connected to the sensor driving circuit through a first contact part and connected to the first readout portion through a second contact part, wherein the first contact part and the second contact part are spaced apart in a direction intersecting the extending direction of the first readout portion.

16. The display devic

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hyeonsik
• Kim Gun Hee
• Kim Sangwoo
• Ahn Taekyung
• Lee Dae-Young

Classifications

• G09G2320/0238

  Improving the black level · CPC title

• G09G2300/0861

  with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes · CPC title

• G09G2300/0842

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

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title