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:
Jun. 13, 1989
Filed:
Dec. 01, 1987
Applicant:
Inventors:
Jurgen Pottharst, Stuttgart, DE;
Kurt M Tischer, Wendlingen, DE;
Assignee:
Nokia Graetz GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; H01J / ; H04N / ;
U.S. Cl.
CPC ...
3503 / ; 3503 / ; 350345 ; 313465 ; 358236 ;
Abstract
A projection tube includes a liquid crystal cell having liquid crystal material sandwiched between two plates. The cell is addressable by an electron beam and serves as a light valve for plane-parallel light with which the projection tube is illuminated from behind. On the side facing the liquid crystal material, the plate on which the electron beam writes has dot coatings of indium-tin oxide to achieve a high resolution and a sharp definition of the image to be displayed on a screen. The side of the plate on which the electron beam writes has an insulating layer of magnesium oxide.