The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1987
Filed:
Mar. 18, 1985
Seigo Togashi, Tokorozawa, JP;
Etsuo Yamamoto, Tokorozawa, JP;
Katsumi Aota, Tokorozawa, JP;
Hiroshi Tanabe, Tokorozawa, JP;
Kanetaka Sekiguchi, Tokorozawa, JP;
Kazuaki Sorimachi, Tokorozawa, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
An 'active matrix' type of liquid crystal matrix display panel, in which diodes are employed as switching elements coupled to each liquid crystal display element, photo-sensing elements such as photo-diodes are formed upon the display panel to enable data input to the panel by variation of the electrical characteristics of the photo-sensing elements by selectively varying the level of light incident thereon. The photo-sensing elements, when composed of photo-diodes, can be formed during the same manufacturing process and in the same manufacturing steps as those in which the diode switching elements are formed, so that no appreciable increase in manufacturing cost is entailed by adding such a data input function.