Display apparatus with organic diodes blocking static electricity in touch signal distribution

Patent metadata

Field	Value
Publication number	US-12514083-B2
Application number	US-202418769396-A
Country	US
Kind code	B2
Filing date	Jul 11, 2024
Priority date	Nov 23, 2023
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Provided is a display apparatus including a substrate including a display area and a peripheral area outside the display area, light-emitting diodes arranged in the display area, an electrode unit including electrode groups arranged on the light-emitting diodes, a touch driving pad arranged in the peripheral area, a touch signal distribution unit arranged in the peripheral area and electrically connected between the electrode unit and the touch driving pad, and a static electricity blocking unit electrically connected to the touch signal distribution unit and including organic diodes, wherein each of the organic diodes includes a first electrode, a second electrode arranged on the first electrode, and organic layer between the first electrode and the second electrode.

First claim

What is claimed is:

1 . A display apparatus comprising:
a substrate comprising a display area and a peripheral area outside the display area; light-emitting diodes arranged in the display area; an electrode unit comprising electrode groups arranged on the light-emitting diodes; a touch driving pad arranged in the peripheral area; a touch signal distribution unit including at least one demultiplexer arranged in the peripheral area and electrically connected between the electrode unit and the touch driving pad; and a static electricity blocking unit electrically connected to the touch signal distribution unit and comprising organic diodes, wherein each of the organic diodes comprises a first electrode, a second electrode arranged on the first electrode, and organic layer between the first electrode and the second electrode wherein the static electricity blocking unit includes at least two blocking units with two of the at least two blocking units arranged on two sides of one of the at least one demultiplexer.

2 . The display apparatus of claim 1 , wherein each of the light-emitting diodes further comprises a pixel electrode, an opposite electrode arranged on the pixel electrode, and an intermediate layer between the pixel electrode and the opposite electrode, and the first electrode and the pixel electrode include a same material, and the second electrode and the opposite electrode include a same material.

3 . The display apparatus of claim 2 , wherein the organic layer and the intermediate layer include a same material.

4 . The display apparatus of claim 2 , wherein the intermediate layer comprises a light-emitting layer, a first functional layer between the pixel electrode and the light-emitting layer, and a second functional layer between the opposite electrode and the light-emitting layer, and the organic layer includes a same material as at least one of the first functional layer and the second functional layer.

5 . The display apparatus of claim 1 , wherein the organic diodes comprise a first organic diode and a second organic diode, and a second electrode of the first organic diode is electrically connected to a first voltage line, and a second electrode of the second organic diode is electrically connected to a second voltage line, and a first voltage applied to the first voltage line is greater than a voltage applied to the second voltage line.

6 . The display apparatus of claim 1 , wherein the static electricity blocking unit further comprises rectifier transistors, and a second electrode of each of the organic diodes is electrically connected to a first voltage line, and each of the rectifier transistors comprises a semiconductor layer and a gate electrode on the semiconductor layer, wherein the semiconductor layer comprises a source region, a drain region, and a channel region between the source region and the drain region, and the gate electrode is electrically connected to the drain region, and the source region is electrically connected to a second voltage line.

7 . The display apparatus of claim 6 , wherein a first voltage applied to the first voltage line is greater than a second voltage applied to the second voltage line.

8 . The display apparatus of claim 7 , wherein the first voltage includes a gate high-level voltage, and the second voltage includes a gate low-level voltage.

9 . The display apparatus of claim 1 , wherein the touch signal distribution unit comprises a first demultiplexer and a second demultiplexer configured to electrically connect the first demultiplexer to the touch driving pad, and the first demultiplexer comprises sub-demultiplexers, and each of the sub-demultiplexers is electrically connected to one of the electrode groups.

10 . The display apparatus of claim 9 , wherein the second demultiplexer is further configured to sequentially connect the sub-demultiplexers to the touch driving pad in response to first control signals.

11 . The display apparatus of claim 10 , wherein the sub-demultiplexer connected to the touch driving pad is configured to sequentially connect touch electrodes of a corresponding electrode group to the second demultiplexer in response to second control signals.

12 . The display apparatus of claim 9 , wherein the static electricity blocking unit comprises a first blocking unit and a second blocking unit arranged at two sides of the first demultiplexer.

13 . The display apparatus of claim 9 , wherein the static electricity blocking unit comprises a third blocking unit and a fourth blocking unit arranged at two sides of the second demultiplexer.

14 . The display apparatus of claim 9 , wherein each of the sub-demultiplexer comprises:
first switching transistors; first connection wirings configured to electrically connect a first source-drain electrode of each of the first switching transistors to a corresponding touch electrode; and second connection wirings configured to electrically connect a second source-drain electrode of each of the first switching transistors to the second demultiplexer.

15 . The display apparatus of claim 14 , wherein a number of the first switching transistors is same as a number of the touch electrodes of each of the electrode groups.

16 . The display apparatus of claim 14 , wherein the second demultiplexer comprises:
second switching transistors; third connection wirings configured to electrically connect a first source-drain electrode of each of the second switching transistors to a corresponding sub-demultiplexer; and fourth connection wirings configured to electrically connect a second source-drain electrode of each of the second switching transistors to the touch driving pad.

17 . The display apparatus of claim 16 , wherein a number of the second switching transistors is same as a number of the sub-demultiplexers.

18 . The display apparatus of claim 16 , wherein a first electrode of each of the organic diodes is electrically connected to one of the first connection wirings, the second connection wirings, the third connection wirings, and the fourth connection wirings, and a second electrode of each of the organic diodes is electrically connected to a first voltage line or a second voltage line.

19 . The display apparatus of claim 16 , wherein a first electrode of each of the organic diodes overlaps one of the first connection wirings, the second connection wirings, the third connection wirings, and the fourth connection wirings in a plan view.

20 . The display apparatus of claim 16 , wherein the first connection wirings, the second connection wirings, the third connection wirings, and the fourth connection wirings extend in a first direction, and second electrodes of the organic diodes are arranged along an imaginary straight line extending in a second direction crossing the first direction, are integrated into a single body.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Seungchan
• Kang Cheolku
• Gwak Raeyoung
• Lee Seongjun

Classifications

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G3/3233

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

• G09G2300/0842

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

• G09G2330/04

  Display protection · CPC title