TOUCH INPUT DEVICE CAPABLE OF DETECTING TOUCH PRESSURE AND COMPRISING DISPLAY MODULE

• US 20180246611A1
• Filed: 09/06/2016
• Published: 08/30/2018
• Est. Priority Date: 09/09/2015
• Status: Active Grant

• Current Assignee: HiDeep Inc.
• Original Assignee: HiDeep Inc.
• Inventors: Kim, Tae Hwan, Kim, Bon Kee
• Granted Patent: US 10,459,560 B2
• Time in Patent Office: Days
• 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 includes a display module having a first layer made of glass or plastic and a second layer disposed under the first layer and made of glass or plastic; touch electrodes formed within the display module for detecting the touch position and the touch pressure; and a reference electrode disposed apart from the touch electrode. The touch position is detected by a sensing signal received from the touch electrode. An electrical signal changed by a capacitance between the touch electrode and the reference electrode is detected from the touch electrode. The capacitance is changed by change of a distance between the touch electrode and the reference electrode. The distance between the touch electrode and the reference electrode is changed by the bending of the display module. The touch pressure is detected based on the capacitance.

Claims

1-40. -40. (canceled)

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

a first electrode for detecting the touch position;

a second electrode which is formed within a liquid crystal layer and is for detecting the touch pressure;

a reference electrode which is formed apart from the second electrode,

wherein the second electrode detects the touch pressure on the basis of a self-capacitance change amount according to change of a distance between the second electrode and the reference electrode.

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

a first electrode for detecting the touch position;

a second electrode which is formed under an organic material layer and is for detecting the touch pressure;

a reference electrode which is formed apart from the second electrode,

wherein the second electrode detects the touch pressure on the basis of a self-capacitance change amount according to change of a distance between the second electrode and the reference electrode.