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. 29, 2007
Filed:
Jan. 03, 2005
Takashi Akutsu, Akiruno, JP;
Takashi Akutsu, Akiruno, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A projection apparatus has a projection system including a spatial optical modulator (SOM), which projects an image according to an input image signal, and a projection lens, two retardation sensors and a ranging section, which measure distances corresponding to plural positions in an image projection plane, a key/indicator section provided with a 'One-shot AFK' key, which instructs execution of keystone correction and focusing only once, and a 'Continuous AFK' key, which instructs continuous execution thereof, and a control section which performs keystone correction on a light image to be formed by the SOM in such a way that a projected image becomes a rectangle with adequate aspect ratio based on distances acquired, focuses the projection lens at an arbitrary position in an image having undergone keystone correction, and controls number of times keystone correction and focusing are to be executed in response to an instruction from one of the keys.