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. 17, 2016
Filed:
Jun. 25, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Takuma Jiko, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image projection apparatus configured to project an image on the projection surface includes a light modulation unit configured to modulate light from a light source unit, an image processing unit configured to generate an image signal to be input to the light modulation unit, disposed in the image projection apparatus and, a light intensity measuring unit configured to measure an intensity of part of the modulated by the light modulation unit, a light guide optical system configured to guide the part of the light to the light intensity measuring unit and another part of the light to the projection surface, and a correction unit configured to correct brightness of the image projected on the projection surface based on a video signal supplied to the image projection apparatus and a measurement result of the light intensity measuring unit.