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. 19, 2020
Filed:
Jan. 07, 2016
Seiko Epson Corporation, Tokyo, JP;
Naoto Takehana, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A optical projection device disposed close to a projection surface and capable of further widening an angle is provided. A optical projection device includes first optical system including lens groups movable and second optical system reflecting light emitted from the first optical system. The first optical system includes first lens frame which holds first lens group positioned at side closest to the second optical system among the movable lens groups and includes cam pin, guide barrel which includes straight groove, cam barrel which includes cam groove with which the cam pin is engaged, the first lens frame includes frame protruding portion protruding from the cam barrel to second optical system side and holding the first lens group, and notch is provided in such way that portion is formed to be cut out at side through which light reflected by the second optical system passes, in the frame protruding portion.