Optical Touch Panel
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2005-Feb-16
This article describes a touch sensitive panel that mounts directly over the surface of a CRT display. Transparent silicone rubber has been formulated for the panel. Resiliency of the rubber can be tailored to give varying amounts of tactile feedback to the user (soft or hard contact). The rubber material exhibits a change in the refraction angle of optical transmission with applied stress (Figs. 1 and 2).