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. 12, 1999
Filed:
May. 28, 1996
Applicant:
Inventors:
Assignee:
Smartlight Ltd., Haifa, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
349-5 ; 40361 ;
Abstract
A transparency viewing device including a faceplate adapted for mounting at least one transparency thereon, an LCD array defining an array of pixels, a driver which selectively varies the transparency of the pixels, a source of back illumination for the LCD array wherein the LCD is substantially effective to effectively block light within a relatively limited range of angles around the normal to the LCD and is relatively ineffective to block light reaching it from angles outside the limited range of angles and a light detector which views the array from an angle outside the range of angles at which the LCD is substantially effective to block the light.