TOUCH PRESSURE DETECTABLE TOUCH INPUT DEVICE INCLUDING DISPLAY MODULE

• US 20170068372A1
• Filed: 09/07/2016
• Published: 03/09/2017
• Est. Priority Date: 09/09/2015
• Status: Abandoned Application

• Current Assignee: HiDeep Inc.
• Original Assignee: HiDeep Inc.
• Inventors: Kim, Taehwan, Kim, Bonkee
• Application Number:
  US15/257,997
• Publication Number:
  US 20170068372A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A touch input device detecting a touch position and a touch pressure may be provided. The touch input device includes a display module which includes a first layer made of glass or plastic and a second layer which is disposed under the first layer and is made of glass or plastic; a plurality of touch electrodes which are formed within the display module and are for detecting the touch position and the touch pressure; and a reference electrode which is disposed apart from the touch electrode.

Claims

1. A touch input device detecting a touch position and a touch pressure, the touch input device comprising:

a display module which comprises a first layer made of glass or plastic and a second layer which is disposed under the first layer and is made of glass or plastic;

a plurality of touch electrodes which are formed within the display module and are for detecting the touch position and the touch pressure; and

a reference electrode which is disposed apart from the touch electrode;

wherein a drive signal is applied to the touch electrode and the touch position is detected by a sensing signal received from the touch electrode;

wherein an electrical signal which is changed by a capacitance between the touch electrode and the reference electrode is detected from the touch electrode;

wherein the capacitance is changed by a change of a distance between the touch electrode and the reference electrode;

wherein the distance between the touch electrode and the reference electrode is changed by a bend of the display module; and

wherein the touch pressure is detected based on the capacitance.

2. The touch input device of claim 1, further comprising:

a substrate which is disposed under the display module; and

a spacer layer which is disposed between the touch electrode and the reference electrode;

wherein a spacer layer retaining member having a predetermined thickness is formed along the circumference of the upper portion of the substrate in order to retain the spacer layer;

wherein, when the display module is bent by applying a pressure to the display module, the spacer layer retaining member is not transformed; and

wherein the reference electrode is the substrate.

3. The touch input device of claim 2, wherein the touch electrode is formed on the top surface of the first layer.

4. The touch input device of claim 3, wherein a liquid crystal layer is disposed between the first layer and the second layer.

5. The touch input device of claim 3, wherein an organic material layer is disposed between the first layer and the second layer.

6. The touch input device of claim 2, wherein the touch electrode is formed on the bottom surface of the first layer or on the top surface of the second layer.

7. The touch input device of claim 6, wherein the touch electrode is a common electrode included in the display module.

8. The touch input device of claim 6, wherein a liquid crystal layer is disposed between the first layer and the second layer.

9. The touch input device of claim 6, wherein an organic material layer is disposed between the first layer and the second layer.

10. A touch input device detecting a touch position and a touch pressure, the touch input device comprising:

a display module which comprises a first layer made of glass or plastic and a second layer which is disposed under the first layer and is made of glass or plastic;

a first electrode for detecting the touch position and the touch pressure and a second electrode for detecting the touch position, which are formed within the display module; and

a reference electrode which is disposed apart from the first electrode;

wherein a drive signal is applied to any one of the first electrode and the second electrode, and the touch position is detected by a sensing signal received from the other of the first electrode and the second electrode;

wherein an electrical signal which is changed by a capacitance between the first electrode and the reference electrode is detected from the first electrode;

wherein the capacitance is changed by a change of a distance between the first electrode and the reference electrode;

wherein the distance between the first electrode and the reference electrode is changed by a bend of the display module; and

wherein the touch pressure is detected based on the capacitance.

11. The touch input device of claim 10, further comprising:

a substrate which is disposed under the display module; and

a spacer layer which is disposed between the first electrode and the reference electrode;

wherein a spacer layer retaining member having a predetermined thickness is formed along the circumference of the upper portion of the substrate in order to retain the spacer layer;

wherein, when the display module is bent by applying a pressure to the display module, the spacer layer retaining member is not transformed; and

wherein the reference electrode is the substrate.

12. The touch input device of claim 11, wherein the first electrode and the second electrode are formed on the top surface of the first layer.

13. The touch input device of claim 12, wherein a liquid crystal layer is disposed between the first layer and the second layer.

14. The touch input device of claim 12, wherein an organic material layer is disposed between the first layer and the second layer.

15. The touch input device of claim 11, wherein the first electrode and the second electrode are formed on the bottom surface of the first layer or on the top surface of the second layer.

16. The touch input device of claim 15, wherein the first electrode or the second electrode is a common electrode included in the display module.

17. The touch input device of claim 15, wherein a liquid crystal layer is disposed between the first layer and the second layer.

18. The touch input device of claim 15, wherein an organic material layer is disposed between the first layer and the second layer.

19. The touch input device of claim 11, wherein the second electrode is formed on the top surface of the first layer, and the first electrode is formed on the bottom surface of the first layer or on the top surface of the second layer.

20. The touch input device of claim 19, wherein the first electrode is a common electrode included in the display module.

21. The touch input device of claim 19, wherein a liquid crystal layer is disposed between the first layer and the second layer.

22. The touch input device of claim 19, wherein an organic material layer is disposed between the first layer and the second layer.