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:
Apr. 30, 2002
Filed:
Oct. 10, 1997
Applicant:
Inventors:
Yukio Iigahama, Kawasaki, JP;
Motohiko Fukuhara, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/33 ; G02F 1/1335 ; G02F 1/1333 ; G03B 2/160 ;
U.S. Cl.
CPC ...
G02F 1/33 ; G02F 1/1335 ; G02F 1/1333 ; G03B 2/160 ;
Abstract
A display device including liquid crystal display panels, arrays of convergently transmissive elements for forming an erect and real image, and fresnel lenses for magnifying the image. The configured surface of the fresnel lens is arranged on the light incident side. The configured surface includes periodic ridges with flat crests and inclined surfaces. Shading layers are provided on the flat crests to eliminate ghosts.
Iigahama, Yukio. (2002). Fresnel lens and liquid crystal display device (U.S. Patent No. 6380994). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6380994
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile