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. 20, 1995
Filed:
Dec. 10, 1993
Applicant:
Inventor:
Kazuo Tsukagoshi, Nagaokakyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
359457 ; 359460 ;
Abstract
A transmission screen includes a screen material having a projection light incident surface on which a Fresnel lens is formed, and a projection light outside surface on which a lenticular lens is formed. The lenticular lens has a plurality of lenticular lens portions. Formed between adjacent pairs of the lenticular lens portions are black stripes. Images of the projection light are seen on an outer surface of the lenticular lens. Furthermore, a coating having a low refraction index and a predetermined thickness is formed only on the black stripes.