TOUCH INPUT DEVICE INCLUDING DISPLAY MODULE FORMED WITH PRESSURE SENSING ELECTRODE AND PRESSURE SENSING ELECTRODE FORMING METHOD
First Claim
1. A touch input device capable of detecting a touch pressure, the touch input device comprising:
- a display panel having a pressure electrode which is formed on a back side of the display panel and is for detecting the pressure; and
a reference potential layer which is formed separately from the pressure electrode,wherein the touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode and the reference potential layer.
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Abstract
A touch input device capable of detecting a touch pressure is provided that includes: a display module having a pressure electrode which is formed on a back side of the display panel and is for detecting the pressure; and a reference potential layer which is formed separately from the pressure electrode. The touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode and the reference potential layer. As a result of this, the touch input device becomes thinner, has a reduced manufacturing cost thereof, and detects a touch position and touch pressure without deteriorating the visibility and optical transmittance of the display module.
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Citations
14 Claims
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1. A touch input device capable of detecting a touch pressure, the touch input device comprising:
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a display panel having a pressure electrode which is formed on a back side of the display panel and is for detecting the pressure; and a reference potential layer which is formed separately from the pressure electrode, wherein the touch input device detects the touch pressure on the basis of a capacitance change amount according to a change of a distance between the pressure electrode and the reference potential layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for forming a pressure electrode on a display panel comprising an upper substrate layer made of glass or plastic and a lower substrate layer made of glass or plastic, and a liquid crystal layer or an organic layer between the upper substrate layer and the lower substrate layer,
wherein the method comprises: -
forming the pressure electrode on a bottom surface of the lower substrate layer; forming an insulator on the formed pressure electrode; forming a protective layer on the lower substrate layer in which the pressure electrode and the insulator have been formed, and inverting the lower substrate layer; forming a liquid crystal layer or an organic layer on a top surface of the inverted lower substrate layer; and forming the upper substrate layer on the liquid crystal layer or the organic layer. - View Dependent Claims (11, 12, 13, 14)
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Specification