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. 09, 1978
Filed:
Apr. 30, 1976
Applicant:
Inventors:
Allan R Kmetz, Nussbaumen, CH;
Peter J Wild, Wettingen, CH;
Assignee:
BBC Brown, Boveri & Company, Limited, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; G09F / ;
U.S. Cl.
CPC ...
340336 ; 3403 / ; 340380 ; 350332 ; 350356 ;
Abstract
An electro-optical display device and a method of manufacturing it are disclosed. The display device includes a liquid crystal cell arranged between two polarizers. A light source is positioned adjacent one polarizer on the side thereof remote from the liquid crystal cell, and an electronic control device is coupled to the liquid crystal cell. A diaphragm is arranged on one side of the liquid crystal cell in the form of an aperture for limiting the display field of the liquid crystal. The device limits viewing parallax and improves contrast for both day and night viewing.