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:
May. 01, 1990
Filed:
Oct. 18, 1988
Motoo Takahashi, Nagaokakyo, JP;
Kazuo Tsukagoshi, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A video projector includes a cabinet having a scren mounting opening, a projector unit housed within the cabinet, and a generally rectangular composite projection screen secured to the cabinet to cover the screen mounting opening and a picture is projected from the projector unit onto the screen. The composite screen includes a laminar structure of a Fresnel lens plate and a lenticular lens plate. The lenticular lens plate has a height smaller than the height of the Fresnel lens plate and an upper edge connected by adhesive tape with an upper edge of the Fresnel lens plate such than a lower edge of the lenticular lens plate opposite to the upper edge is offset in an upward direction relative to a lower edge of the Fresnel lens plate to provide a margin extending along the width of the composite screen for accommodating the expansion of the lenticular lens plate. The composite screen is secured to the cabinet and covers the screen mounting opening so that a gap can be formed between the upper clamping fixture and the top edge of the composite screen.