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:
Nov. 15, 1994
Filed:
Mar. 10, 1993
William A Hastings, III, Novato, CA (US);
William N Buchele, Los Gatos, CA (US);
WAH-III Technology Corporation, Novato, CA (US);
Abstract
A back plate structure for a reflective type active matrix liquid crystal display and methods for forming the same, is described. The structure includes an array of reflective electrodes for selectively altering the molecular alignment of liquid crystal material confined above each of the reflective electrodes and an array of light shields spatially offset with the array of reflective electrodes so that the light shields block light passing through portions of gaps formed between adjacent reflective electrodes. Each of the reflective electrodes also has a corresponding light shield which is electrically connected to that reflective electrode so that the liquid crystal material confined above portions of the gaps between adjacent reflective materials can also be altered by the electrically connected light shields. The structure also includes a plurality of positively biased diffusion regions formed in areas where incident light is expected to strike the surface of the silicon substrate, where the positively biased diffusion regions act as electron 'collectors' and the grounded silicon substrate acts as a hole 'collector' for any electrons and holes generated by the photons of light striking the surface of the silicon substrate.