Display device

Patent metadata

Field	Value
Publication number	US-12562123-B2
Application number	US-202519019326-A
Country	US
Kind code	B2
Filing date	Jan 13, 2025
Priority date	Apr 5, 2024
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A display device includes a base layer on which a display area including and a non-display area are defined, a circuit layer on the base layer, and an element layer on the circuit layer and including a light emitting element on the display area, a first light sensing element, and a second light sensing element, wherein the circuit layer includes a pixel driving circuit connected to the light emitting element, a plurality of first reset control lines connected to the first sensor driving circuit, extending in a first direction, arranged in a second direction, and a plurality of second reset control lines connected to the second sensor driving circuit, extending in the first direction, arranged in the second direction, and the plurality of first reset control lines and the plurality of second reset control lines are electrically insulated from each other.

First claim

What is claimed is:

1 . A display device comprising:
a base layer on which a display area including a fingerprint sensing area and an illuminance sensing area and a non-display area are defined; a circuit layer on the base layer; and an element layer on the circuit layer and including a light emitting element on the display area, a first light sensing element in the fingerprint sensing area, and a second light sensing element in the illuminance sensing area, wherein the circuit layer includes: a pixel driving circuit connected to the light emitting element; a first sensor driving circuit connected to the first light sensing element; a second sensor driving circuit connected to the second light sensing element; a plurality of first reset control lines connected to the first sensor driving circuit, extending in a first direction, arranged in a second direction crossing the first direction, and electrically connected to each other; and a plurality of second reset control lines connected to the second sensor driving circuit, extending in the first direction, arranged in the second direction, and electrically connected to each other, and wherein the plurality of first reset control lines and the plurality of second reset control lines are electrically insulated from each other.

2 . The display device of claim 1 , wherein the plurality of first reset control lines are electrically connected by at least one first vertical connection line extending in the second direction, and
wherein the plurality of second reset control lines are electrically connected by at least one second vertical connection line extending in the second direction.

3 . The display device of claim 1 , wherein the illuminance sensing area is closer to an edge of the display area than the fingerprint sensing area.

4 . The display device of claim 2 , wherein the first vertical connection line is on a different layer from those of the plurality of first reset control lines.

5 . The display device of claim 2 , wherein the first vertical connection line is at least one line selected from vertical lines connected to the first sensor driving circuit, extending in the second direction, and arranged in the first direction.

6 . The display device of claim 5 , wherein the first vertical connection line is provided in plurality, and
wherein the plurality of first vertical connection lines are arranged to be biased to one side of the fingerprint sensing area.

7 . The display device of claim 5 , wherein, among the vertical lines, not-selected lines are read-out lines electrically connected to a read-out circuit that reads out a fingerprint sensing signal.

8 . The display device of claim 2 , further comprising:
a bridge line connecting the first vertical connection line and the plurality of first reset control lines in a plan view.

9 . The display device of claim 8 , wherein the bridge line is on a different layer from those of the first vertical connection line and the plurality of first reset control lines.

10 . The display device of claim 8 , further comprising:
a plurality of insulating layers on which a contact hole configured to electrically connect the first vertical connection line and the plurality of first reset control lines is defined.

11 . The display device of claim 10 , wherein the contact hole is provided in plurality,
wherein the contact hole includes: a first contact hole adjacent to one end of the bridge line in the plan view and passing through some of the plurality of insulating layers; and a second contact hole adjacent to another end of the bridge line in the plan view and passing through the others of the plurality of insulating layers, and wherein the one end of the bridge line is electrically connected to the first vertical connection line by the first contact hole, and the another end of the bridge line is electrically connected to the plurality of first reset control lines by the second contact hole.

12 . The display device of claim 10 , wherein the plurality of insulating layers include:
a first insulating layer; a second insulating layer on the first insulating layer; and a third insulating layer on the second insulating layer, and wherein the plurality of first reset control lines are on the first insulating layer, the first vertical connection line is on the third insulating layer, and the bridge line is on the second insulating layer.

13 . The display device of claim 10 , wherein the plurality of insulating layers include:
a first insulating layer; a second insulating layer on the first insulating layer; a third insulating layer on the second insulating layer; and a fourth insulating layer on the third insulating layer, and wherein the plurality of first reset control lines are on the first insulating layer, the first vertical connection line is on the fourth insulating layer, and the bridge line is on the second insulating layer or the third insulating layer.

14 . The display device of claim 2 , wherein the second vertical connection line overlaps the non-display area.

15 . The display device of claim 2 , wherein the second vertical connection line is on a same layer as that of the plurality of second reset control lines.

16 . The display device of claim 2 , wherein each of the first sensor driving circuit and the second sensor driving circuit includes:
a reset transistor including a first electrode configured to receive a reset voltage, a second electrode connected to 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 sensor driving voltage, a second electrode connected to the first sensing node, and a third electrode connected to a second sensing node; and an output transistor including a first electrode connected to the second sensing node, a second electrode connected to a corresponding read-out line, and a third electrode configured to receive an output control signal.

17 . The display device of claim 16 , wherein the plurality of first reset control lines are connected to the third electrode of the reset transistor of the first sensor driving circuit, and
wherein the plurality of second reset control lines are connected to the third electrode of the reset transistor of the second sensor driving circuit.

18 . A display device comprising:
a display panel including a display area in which a light emitting element, a fingerprint sensing element, and an illuminance sensing element are arranged, and a non-display area adjacent to the display area, wherein the display panel includes: a pixel driving circuit connected to the light emitting element; a first sensor driving circuit connected to the fingerprint sensing element; a second sensor driving circuit connected to the illuminance sensing element; a plurality of first reset control lines connected to the first sensor driving circuit, extending in a first direction, and arranged in a second direction crossing the first direction; and a plurality of second reset control lines connected to the second sensor driving circuit, extending in the first direction, and arranged in the second direction, wherein the plurality of first reset control lines are electrically connected by at least one first vertical connection line extending in the second direction, and wherein the plurality of second reset control lines are electrically connected by at least one second vertical connection line extending in the second direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Dong Hee
• No Sang Yong
• Son Sunkwun

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

• G09G2320/0238

  Improving the black level · CPC title

• H10K65/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element and at least one organic radiation-sensitive element, e.g. organic opto-couplers (organic image sensors integrated with organic light-emitting devices H10K39/34; OLED displays integrated with photosensors H10K59/13) · CPC title

• G09G3/3233 Primary

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