Multi‐touch detection technology using a divergence IR beam profile for large LCD touch solutions

Abstract

This paper proposes a multi‐touch detection technology that can be applied to large LCDs. To achieve this goal, a set of IR LEDs and sensors was used to construct an IR matrix, and a new algorithm based on Hough transform was applied. This approach reduced the “Ghost” response of the multi‐touch detection technology to make it better than other IR touch recognition technologies, and showed robust performance in terms of multi‐touch recognition.