Optically Powered and Controlled Electronically Alterable Key labeling
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Fig. 1 illustrates an electronically alterable L:CD (liquid crystal display) for mounting on a keytop in a business machine or terminal device. For an office system to function effectively over a wide range of applications, a variety of key indicia are often required. New products often are offered with the option allowing customers to define their own character sets, fonts or special key designations. The logistics of supplying the numerous options available in the thousands of key labelings that may be chosen greatly complicate the manufacturing process. Numerous electrically alterable keytop display systems have been posed. The present article describes a non-contacting power and control system for operating a liquid crystal display or similar display placed on the top of the key button.