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:
Jan. 01, 1985
Filed:
Feb. 16, 1982
Friedrich W Nickol, Eppstein, DE;
Harald Perthes, Sulzbach, DE;
VDO Adolf Schindling AG, Frankfurt am Main, DE;
Abstract
A display device for displaying light characters against a dark background, particularly a liquid-crystal display. It has a fluid which can be switched between two optically different states located between two support plates (1, 2) which are parallel to each other. On one of the facing surfaces of the support plates there is applied an insulating layer of fixer which contains the spacer elements (7). The support plates (1, 2) are maintained at a given distance from each other by these spacers (7). Furthermore, a polarizer (11, 12) is associated with each support plate (1, 2). In order to assure a strong contrast between the character and its background with precise maintenance of the distance between the support plates (1, 2), the insulating layer of fixer completely covers the support plate (1) and the spacer elements (7) consist of a material of dark color.