Liquid Crystal Display and Touch Panel Keyboard Input
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
This device eliminates the need for using a transparent touch panel input over a liquid crystal display (LCD) in order to create an overall input and display device. It uses the normal top electrode in the liquid crystal display device itself in a unique manner to provide the keyboard or input device function. As shown in Fig. 1, a plan view of a single character segment area on an L:CD display, typical character segments 2 may be energized by circuits (not shown) to create the image desired in the L:CD display format. The cross-sectional view in Fig. 2 shows the overall construction.