Patent ID: 9323360
Filing Date: 2016-04-26
CPC Classification: G02F,G06F

Claim Text:
1. A touch input detection method that detects a contact or approach of a touch input means such as a finger of a human body, an electric conductor or a touch pen on a touch panel and produces an input signal, the touch input detection method comprising the steps of: (a) detecting a first touch input; (b) calculating an area where the first touch input has been detected; (c) detecting a second touch input that occurs at a predetermined time interval after occurrence of the first touch input; (d) calculating an area where the second touch input has been detected; and (e) calculating a change in the areas both within more than one touch cell and within one touch cell from the first touch input to the second touch input to thus produce a zooming signal, wherein the zooming signal that magnifies or reduces a screen on the basis of a central point of the area where the first touch input has occurred is produced, wherein the touch panel comprises a plurality of touch cells that detect a touch input individually are arranged in a matrix form, wherein each touch cell comprises at least one switching element for supply and interception of a position detection signal and a conductive pad that is connected to the gate terminal of the switching element, and wherein (a) detecting a first touch input and (c) detecting a second touch input is performed by detecting a signal that is generates due to charging and discharging of a virtual capacitor that is formed between the touch input means and the conductive pad to thus detect a touch input.