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:
May. 31, 1983
Filed:
Jun. 25, 1980
Fumihiro Ogawa, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
A display panel of the liquid crystal type provides a positive color display of segments or unit display areas using a reduced number of divided electrodes and an increased number of different driving signals. On one side of the panel there is a separate electrode encompassing each display area and all such electrodes include a display area. On the other side there are several common electrodes, each encompassing at least one display area and all cumulatively encompassing all of the display areas. A display area is selected for display by applying driving signals to its opposed electrodes such that substantially zero voltage is across the selected display area thereby leaving colored appearance in the selected display area. All other display areas and background areas are decolored by applying to the respective opposed electrodes driving signals resulting in a liquid crystal threshold voltage being applied across said non-selected display areas and said background areas.