Display device

Patent metadata

Field	Value
Publication number	US-12493373-B2
Application number	US-202418882434-A
Country	US
Kind code	B2
Filing date	Sep 11, 2024
Priority date	Feb 20, 2024
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

A display device is provided. The display device includes a substrate including a touch sensing area and a touch peripheral area disposed near the touch sensing area; a circuit layer disposed on the substrate; a touch sensor layer disposed on the circuit layer, including N number of touch sensing electrodes arranged in the touch sensing area in a first direction and a second direction, and N number of sensing transfer lines electrically connected to the N number of touch sensing electrodes, respectively; a multiplexer disposed in the touch peripheral area and electrically connected between the N number of sensing transfer lines and a touch driving circuit; and an electrostatic shielding layer overlapping with the multiplexer. The N number of sensing transfer lines extend from the N number of touch sensing electrodes to the multiplexer. Among the N number of sensing transfer lines, 2M number of sensing transfer lines selected by the multiplexer are electrically connected to the touch driving circuit. Each of N and M is a natural number and M is smaller than N.

First claim

What is claimed is:

1 . A display device comprising:
a substrate including a touch sensing area and a touch peripheral area disposed near the touch sensing area; a circuit layer disposed on the substrate; a touch sensor layer disposed on the circuit layer, including N number of touch sensing electrodes arranged in the touch sensing area in a first direction and a second direction, and N number of sensing transfer lines electrically connected to the N number of touch sensing electrodes, respectively; a multiplexer disposed in the touch peripheral area and electrically connected between the N number of sensing transfer lines and a touch driving circuit; and an electrostatic shielding layer overlapping with the multiplexer, wherein the N number of sensing transfer lines extend from the N number of touch sensing electrodes to the multiplexer, among the N number of sensing transfer lines, 2M number of sensing transfer lines selected by the multiplexer are electrically connected to the touch driving circuit, and each of N and M is a natural number and M is smaller than N.

2 . The display device of claim 1 , wherein the multiplexer includes:
a first MUX unit for selecting a first set of M sensing transfer lines among the N sensing transfer lines; a second MUX unit for transferring a sensing signal of a first subset of the first set of M sensing transfer lines selected by the first MUX unit to the touch driving circuit; and a third MUX unit for transferring a driving signal to a second set of M sensing transfer lines among the N sensing transfer lines, wherein the first set and the second set of M sensing transfer lines are different; and the second MUX unit transfers the driving signal to a second subset of the first set of sensing transfer lines.

3 . The display device of claim 2 , wherein each of the first MUX unit, the second MUX unit and the third MUX unit includes M number of channels, and
the M number of channels select mutually exclusive sensing transfer lines of the N number of sensing transfer lines.

4 . The display device of claim 2 , wherein the first MUX unit includes N number of first MUX transistors electrically connected to the N number of sensing transfer lines, respectively,
the second MUX unit includes M number of second MUX transistors and M number of third MUX transistors, which are electrically connected to M number of sensing transfer lines selected by the first MUX unit, the third MUX unit includes N number of fourth MUX transistors electrically connected to the N number of sensing transfer lines, respectively, and the multiplexer further includes: a first line portion including lines electrically connected to the N number of first MUX transistors and arranged to be adjacent to each other; a second line portion including lines electrically connected to the M number of second MUX transistors and the M number of third MUX transistors and arranged to be adjacent to each other; and a third line portion including lines electrically connected to the N number of third MUX transistors and arranged to be adjacent to each other.

5 . The display device of claim 4 , wherein the touch sensor layer includes:
a touch buffer layer disposed on the circuit layer; a first touch conductive layer disposed on the touch buffer layer; a touch interlayer insulating layer covering the first touch conductive layer; a second touch conductive layer disposed on the touch interlayer insulating layer; and a touch planarization layer covering the second touch conductive layer, and the electrostatic shielding layer is disposed as the second touch conductive layer on the touch interlayer insulating layer.

6 . The display device of claim 5 , wherein the N number of touch sensing electrodes are disposed as the first touch conductive layer and spaced apart from each other, and
the N number of sensing transfer lines are disposed as the second touch conductive layer and spaced apart from each other.

7 . The display device of claim 5 , wherein the circuit layer includes:
an interlayer insulating layer disposed on the substrate; and a planarization layer covering a source drain conductive layer on the interlayer insulating layer, and the interlayer insulating layer covers the N number of first MUX transistors, the M number of second MUX transistors, the M number of third MUX transistors and the N number of fourth MUX transistors, and the lines of each of the first line portion, the second line portion and the third line portion are disposed as the source drain conductive layer.

8 . The display device of claim 7 , wherein the electrostatic shielding layer extends toward an edge of the substrate, covers a side of each of the touch interlayer insulating layer and the planarization layer, and is in contact with the interlayer insulating layer.

9 . The display device of claim 7 , wherein the circuit layer further includes a ground line disposed to be adjacent to an edge of the substrate, transferring a ground power source, and
the electrostatic shielding layer is electrically connected to the ground line.

10 . The display device of claim 9 , wherein the electrostatic shielding layer extends toward the edge of the substrate, covers a side of each of the touch interlayer insulating layer and the planarization layer, and is in contact with the interlayer insulating layer.

11 . The display device of claim 9 , wherein the circuit layer further includes a ground connection electrode overlapping with the ground line and the electrostatic shielding layer and disposed as the source drain conductive layer, and
the ground connection electrode is electrically connected to the ground line through a hole in the interlayer insulating layer, and is electrically connected to the electrostatic shielding layer through a hole extending through the planarization layer and the touch interlayer insulating layer.

12 . The display device of claim 7 , wherein the circuit layer further includes:
an electrostatic shielding auxiliary layer disposed on the substrate and overlapping with the multiplexer and the electrostatic shielding layer; and a buffer layer covering the electrostatic shielding auxiliary layer, and wherein the interlayer insulating layer is disposed on the buffer layer.

13 . The display device of claim 12 , wherein the electrostatic shielding layer extends toward an edge of the substrate, covers a side of each of the touch interlayer insulating layer and the planarization layer, and is in contact with the interlayer insulating layer.

14 . The display device of claim 13 , wherein the circuit layer further includes a ground line disposed to be adjacent to the edge of the substrate, transferring a ground power source, and the electrostatic shielding layer is electrically connected to the ground line.

15 . The display device of claim 7 , further comprising transmissive holes extending through the electrostatic shielding layer to the touch interlayer insulating layer,
wherein the transmissive holes overlap the first line portion, the second line portion and the third line portion, and are spaced apart from the N number of first MUX transistors, the M number of second MUX transistors, the M number of third MUX transistors and the N number of fourth MUX transistors.

16 . A display device comprising:
a substrate including a touch sensing area and a touch peripheral area disposed near the touch sensing area; a circuit layer disposed on the substrate; a touch sensor layer disposed on the circuit layer, including N number of touch sensing electrodes arranged in

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Seung Chan
• Park Sung Kyun
• Kang Cheol Ku
• Kim Ki Cheol
• Choi Dong Hee
• Hwang Do Yeon

Classifications

• H10W42/60

  protecting against electrostatic charges or discharges, e.g. Faraday shields (integrated devices comprising arrangements for electrical protection H10D89/60) · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/04164 Primary

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title