Touch input device

Patent metadata

Field	Value
Publication number	US-11301103-B2
Application number	US-202117209163-A
Country	US
Kind code	B2
Filing date	Mar 22, 2021
Priority date	Aug 1, 2014
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A touch input device includes an organic light emitting display module; a pressure sensor including a pressure electrode outputting a first sensing signal for detecting a touch pressure and which is attached under the organic light emitting display module; a touch sensor including drive electrodes to which a driving signal is applied and receiving electrodes outputting a second sensing signal for detecting a touch position; and a substrate located under the organic light emitting display module. The substrate is spaced apart from the organic light emitting display module and includes a reference potential layer. A controller detects a magnitude of the touch pressure based on the first sensing signal. The organic light emitting display module is bent by the touch pressure. A distance between the pressure electrode and the reference potential layer is changed according to a bending of the organic light emitting display module.

First claim

What is claimed is:

1. A touch input device comprising:
an organic light emitting display module;
a pressure sensor comprising a pressure electrode outputting a first sensing signal for detecting a touch pressure and which is attached under the organic light emitting display module;
a touch sensor comprising a plurality of drive electrodes to which a driving signal is applied and a plurality of receiving electrodes outputting a second sensing signal for detecting a touch position;
a substrate located under the organic light emitting display module, spaced apart from the organic light emitting display module and comprising a reference potential layer; and
a controller which detects a magnitude of the touch pressure based on the first sensing signal,
wherein the organic light emitting display module is bent by the touch pressure,
wherein a distance between the pressure electrode and the reference potential layer is change according to a bending of the organic light emitting display module, and
wherein the first sensing signal comprises an electrical characteristics information changed according to the distance.

2. The touch input device of claim 1 , wherein the pressure sensor further comprises an insulation layer located between the organic light emitting display module and the pressure electrode.

3. The touch input device of claim 1 , wherein the pressure electrode contacts and is attached to a bottom of the organic light emitting display module.

4. The touch input device of claim 1 , wherein the pressure electrode comprises a plurality of electrodes constituting a plurality of channels.

5. The touch input device of claim 1 , wherein the reference potential layer is voltage common electrode.

6. A touch input device comprising:
an organic light emitting display module comprising a reference potential layer;
a substrate located under the organic light emitting display module, spaced apart from the organic light emitting display module;
a pressure sensor comprising a pressure electrode outputting a first sensing signal for detecting a touch pressure and which is attached on the substrate;
a touch sensor comprising a plurality of drive electrodes to which a driving signal is applied and a plurality of receiving electrodes outputting a second sensing signal for detecting a touch position; and
a controller which detects a magnitude of the touch pressure based on the first sensing signal,
wherein the organic light emitting display module is bent by the touch pressure,
wherein a distance between the pressure electrode and the reference potential layer is change according to a bending of the organic light emitting display module, and
wherein the first sensing signal comprises an electrical characteristics information changed according to the distance.

7. The touch input device of claim 6 , wherein the pressure sensor further comprises an insulation layer located between the substrate and the pressure electrode.

8. The touch input device of claim 6 , wherein the pressure electrode contacts and is attached to a top of the substrate.

9. The touch input device of claim 6 , wherein the pressure electrode comprises a plurality of electrodes constituting a plurality of channels.

10. The touch input device of claim 6 , wherein the reference potential layer is voltage common electrode.

11. A touch input device comprising:
an organic light emitting display module;
a substrate located under the organic light emitting display module, spaced apart from the organic light emitting display module;
a pressure sensor comprising a first pressure electrode which is attached under organic light emitting display module and a second pressure electrode which is attached on the substrate, wherein one of the first pressure electrode and the second pressure electrode being outputting a first sensing signal for detecting a touch pressure;
a touch sensor comprising a plurality of drive electrodes to which a driving signal is applied and a plurality of receiving electrodes outputting a second sensing signal for detecting a touch position; and
a controller which detects a magnitude of the touch pressure based on the first sensing signal,
wherein the organic light emitting display module is bent by the touch pressure,
wherein a distance between the first pressure electrode and the second pressure electrode is change according to a bending of the organic light emitting display module, and
wherein the first sensing signal comprises an electrical characteristics information changed according to the distance.

12. The touch input device of claim 11 , wherein the pressure sensor further comprises an insulation layer located between the first pressure electrode and the organic light emitting display module.

13. The touch input device of claim 11 , wherein the pressure sensor further comprises an insulation layer located between the second pressure electrode and the substrate.

14. The touch input device of claim 11 , wherein the first pressure electrode contacts and is attached to a bottom of the organic light emitting display module.

15. The touch input device of claim 11 , wherein the second pressure electrode contacts and is attached to a top of the substrate.

16. The touch input device of claim 11 , wherein each of the first and second pressure electrodes comprises a plurality of electrodes constituting a plurality of channels.

17. The touch input device of claim 11 , wherein one of the first and second pressure electrodes is voltage common electrode.

18. A touch input device comprising:
a display panel;
a touch sensor including a driving electrode and a receiving electrode disposed on the display panel or inside the display panel;
an electrode pattern directly formed at a bottom surface of the display panel; and
a controller providing a first driving signal to the driving electrode of the touch sensor, receiving a touch detection signal from the receiving electrode of the touch sensor, detecting a touch position based on the touch detection signal, and providing a second driving signal different from the first driving signal to the electrode pattern,
wherein the electrode pattern is disposed between a central portion and an edge portion of the bottom surface of the display panel, and disposed to surround the central portion.

19. The method of claim 18 , wherein the electrode pattern comprises:
a first electrode pattern extending in a first direction and having one end to which the second driving signal is applied;
a second electrode pattern having one end connected to the other end of the first electrode pattern and extending in a second direction perpendicular to the first direction;
a third electrode pattern having one end connected to the other end of the second electrode pattern and extending in the first direction; and
a fourth electrode pattern having one end connected to the other end of the third electrode pattern and extending in the second direction.

20. The method of claim 18 ,
wherein the electrode pattern has a predetermined curvature and is arranged in a circle.

21. The method of claim 18 , wherein the electrode pattern comprises:
a plurality of first electrode patterns extending in parallel along the first direction; and
a second electrode pattern extending in a second direction perpendicular to the first direction and connected to one end of each of the plurality of first electrode patterns,
wherein the second driving signal is applied to the other end of one of the first ele

Assignees

• Hideep Inc

Inventors

• Kim Seyeob
• Yoon Sangsic
• Kwon Sunyoung
• Moon Hojun
• Kim Taehoon
• Kim Bonkee

Classifications

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/0445

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

• G06F3/0446 Primary

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

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title