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. 10, 1990
Filed:
Nov. 07, 1988
Masateru Itoh, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A back-projection picture display apparatus which consists of a cabinet including a back-projection screen with a Fresnel lens plate, a video projector unit housed within the cabinet, and a remote control system including a remote controller for generating an infrared beam of a particular characteristic descriptive of a particular command with which the apparatus is operated and a command sensor operable in response to the infrared beam to operate the apparatus to accomplish a mode of operation assigned by such particular command. The command sensor is housed within the cabinet and arranged at a location where the infrared rays of light passing through the Fresnel lens plate are converged.