Method and device for detecting touch input

摘要

Provided is a touch input detection method that detects a contact or approach of a touch input means (90) such as a finger of a human body, an electric conductor or a touch pen on a touch panel (10) and produces an input signal. The touch input detection method includes 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) judging a change in the areas from the first touch input to the second touch input to thus produce a zooming signal. Accordingly, a zooming signal is produced according to a change in an area of a touch input, to thus implement a zoom gesture very simply, to also realize the zoom gesture with only one finger, and to thereby achieve a touch input operation compactly.

主权项

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.