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:
Jul. 11, 2006
Filed:
Nov. 26, 2002
Hiroshi Suzuki, Tokyo, JP;
Takao Endo, Tokyo, JP;
Shinsuke Shikama, Tokyo, JP;
Shuso Wadaka, Tokyo, JP;
Kohei Teramoto, Tokyo, JP;
Kuniko Kojima, Tokyo, JP;
Shigekazu Tsuda, Tokyo, JP;
Hiroshi Suzuki, Tokyo, JP;
Takao Endo, Tokyo, JP;
Shinsuke Shikama, Tokyo, JP;
Shuso Wadaka, Tokyo, JP;
Kohei Teramoto, Tokyo, JP;
Kuniko Kojima, Tokyo, JP;
Shigekazu Tsuda, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A transparent screen includes a refraction/total reflection plate in a form of a Fresnel lens, the refraction/total reflection plate having a sawtooth surface upon which light is incident and another surface via which the light exits, and an image formation/display plate for forming a projection image from the light that exits from the refraction/total reflection plate. Refraction slating surface portions each for refracting incident light towards the other surface of the refraction/total reflection plate, transmission slating surface portions each for making incident light pass therethrough, and total reflection slating surface portions each for reflecting incident light passing through one transmission slating surface portion towards the other surface of the refraction/total reflection plate being formed concentrically on the sawtooth surface of the refraction/total reflection plate.