Display device and position input system including the same

Patent metadata

Field	Value
Publication number	US-2024256090-A1
Application number	US-202318465713-A
Country	US
Kind code	A1
Filing date	Sep 12, 2023
Priority date	Jan 31, 2023
Publication date	Aug 1, 2024
Grant date	—

Abstract

A display device includes a display unit, a touch sensing unit disposed on a front surface of the display unit, a code placement unit including a plurality of code patterns and a pattern protection layer, and disposed on the touch sensing unit, and an adhesive material disposed on the code placement unit, wherein the pattern protection layer covers the plurality of code patterns and separates the plurality of code patterns from the adhesive material.

First claim

What is claimed is:

1 . A display device comprising:
a display unit; a touch sensing unit disposed on a front surface of the display unit; a code placement unit including a plurality of code patterns and a pattern protection layer, and disposed on the touch sensing unit; and an adhesive material disposed on the code placement unit, wherein the pattern protection layer covers the plurality of code patterns and separates the plurality of code patterns from the adhesive material.

2 . The display device of claim 1 , wherein the code placement unit further comprises a transparent insulating layer forming a rear surface of the code placement unit facing the touch sensing unit,
wherein the plurality of code patterns have preset planar code shapes on a surface of the transparent insulating layer, and wherein the pattern protection layer covers the plurality of code patterns and at least a portion of the surface of the transparent insulating layer.

3 . The display device of claim 1 ,
wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit, wherein the pattern protection layer is formed to cover the plurality of code patterns and at least a portion of a surface of the transparent layer, and wherein the pattern protection layer of the code placement unit is attached to face the touch sensing unit by a first adhesive layer.

4 . The display device of claim 1 ,
wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit, wherein the transparent layer forms a rear surface of the code placement unit facing the touch sensing unit, and wherein a second adhesive layer is disposed on the transparent layer and attaches the code placement unit to the touch sensing unit.

5 . A display device comprising:
a display unit including a plurality of emission areas; a touch sensing unit disposed on a front surface of the display unit; a code placement unit including a plurality of code patterns and a pattern protection layer covering and shielding the plurality of code patterns, and disposed on the touch sensing unit; an adhesive material disposed on the code placement unit; and a front protective cover attached to the code placement unit by the adhesive material.

6 . The display device of claim 5 , wherein the pattern protection layer covers the plurality of code patterns and separates the plurality of code patterns from the adhesive material.

7 . The display device of claim 5 , wherein the code placement unit further comprises a transparent insulating layer forming a rear surface of the code placement unit facing the touch sensing unit,
wherein the plurality of code patterns have preset planar code shapes on a surface of the transparent insulating layer, and wherein the pattern protection layer covers the plurality of code patterns and at least a portion of the surface of the transparent insulating layer, and separates the plurality of code patterns from the adhesive material.

8 . The display device of claim 5 ,
wherein the pattern protection layer comprises at least one inorganic layer including at least one of a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

9 . The display device of claim 5 ,
wherein the pattern protection layer comprises at least one organic layer including at least one of an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

10 . The display device of claim 5 ,
wherein the plurality of code patterns have a same width at least equal to widths of driving electrodes, sensing electrodes, and dummy electrodes formed in the touch sensing unit.

11 . The display device of claim 10 ,
wherein a planar code shape of the plurality of code patterns has a pattern shape comprising at least one of a polygonal pattern shape, a polygonal closed loop pattern shape, a mesh pattern structure, or an open loop pattern shape.

12 . The display device of claim 5 , wherein the code placement unit comprises:
a transparent layer forming a rear surface of the code placement unit facing the touch sensing unit; and a reflection pattern layer including a plurality of reflective patterns formed below the plurality of code patterns, corresponding to a code pattern formation region, and disposed between the code placement unit and the transparent layer.

13 . The display device of claim 12 ,
wherein the plurality of code patterns have planar code shapes disposed on a reflection pattern of the reflection pattern layer, wherein the pattern protection layer covers the plurality of code patterns and the reflection pattern layer, and wherein the adhesive material is applied on to the pattern protection layer.

14 . The display device of claim 12 ,
wherein the plurality of reflective patterns are formed in a region in which touch electrodes and dummy electrodes of the touch sensing unit are disposed and in the code pattern formation region, and wherein a remaining region in which the plurality of reflective patterns are not formed is formed of a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

15 . The display device of claim 5 ,
wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit, and wherein the pattern protection layer is formed to cover the plurality of code patterns and at least a portion of a surface of the transparent layer.

16 . The display device of claim 5 ,
wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit, wherein the pattern protection layer is formed to cover the plurality of code patterns and at least a portion of a surface of the transparent layer, and wherein the pattern protection layer of the code placement unit is attached to face the touch sensing unit by a first adhesive layer.

17 . The display device of claim 5 ,
wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit, wherein the transparent layer forms a rear surface of the code placement unit facing the touch sensing unit, wherein a second adhesive layer is disposed on the transparent layer and attaches the code placement unit to the touch sensing unit.

18 . A position input system comprising:
a display device displaying an image; and a position input device in which coordinate data is input, wherein the display device comprises: a display unit including a plurality of emission areas; a touch sensing unit disposed on a front surface of the display unit to sense touch coordinates; a code placement unit including a pattern protection layer covering and shielding a plurality of code patterns, and disposed on the touch sensing unit; an adhesive material disposed on the code placement unit; and a front protective cover attached on to the code placement unit by the adhesive material.

19 . The position input system of claim 18 , wherein the pattern protection layer covers the plurality of code patterns and separates the plurality of code patterns from the adhesive material.

20 . The position input system of claim 18 , wherein the plurality of code patterns have planar code shapes on a transparent layer of the code placement unit,
wherein the pattern protection layer is formed to cover the plurality of

Assignees

• Samsung Display Co Ltd

Inventors

• Seol Jun Yeong
• An Sung Guk
• Gu Da Som
• Roh Ki Jun
• Lee Hee Young
• Han So Yeon

Classifications

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0442 Primary

  using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser · CPC title

• G06F3/0441

  using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals · 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