COMPLEMENTARY METAL OXIDE SEMICONDUCTOR, SOURCE OF LIGHT USING THE TOUCH COORDINATES PRECEPTION METHOD AND THE TOUCH SCREEN SYSTEM

摘要

A method for recognizing touch coordinates by using a photographing device and light source and a touch screen system using the same are provided to improve the coordinate detection speed and accuracy by using a simple touch detection algorithm. The distance ratio among 3 light sources located at an image obtained from an arbitrary photographing device is calculated. The point of an arbitrary object which is close or adjacent to a plane is recognized. The distance ratio between the recognized point and light sources located at the both ends is calculated. By multiplying video images obtained by each photographing device by the distance ratios, the first and second virtual ratios are calculated.