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:
Sep. 12, 2000
Filed:
Oct. 24, 1997
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A display device comprises a transparent type LCD including a pair of transparent plates facing each other, spaced with a predetermined gap and a polymer dispersed liquid crystal disposed between the transparent plates, which can be switched between a transparent state and a diffraction state pixel by pixel to display images or characters; a signal generator for giving display signals to the transparent type LCD; and a light system including a light source emitting light rays that enter the transparent plates from their edge faces, and a stop plate disposed between the edge faces of the transparent plates and the light source. This stop plate has an opening that extends along the longitudinal direction of the edge face of the transparent plate, and the width of the opening in the cross direction changes cyclically along the longitudinal direction.