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:
Aug. 14, 2012
Filed:
Apr. 06, 2010
Hiroshi Nishigaki, Daito, JP;
Atsuya Hirano, Daito, JP;
Atsuhiko Chikaoka, Daito, JP;
Ken Nishioka, Daito, JP;
Hiroshi Nishigaki, Daito, JP;
Atsuya Hirano, Daito, JP;
Atsuhiko Chikaoka, Daito, JP;
Ken Nishioka, Daito, JP;
Funai Electric Co., Ltd., Daito-shi, JP;
Abstract
A projector includes a determination section, an amplification section, an identification section and a calculation section. The determination section specifies a reflection position of a reflected light received by a light receiving sensor based on a horizontal synchronizing signal and a pixel clock signal of an image signal, and determines an amplification quantity of the intensity of a reflected light reflected at the specified reflection position to be received by the light receiving sensor. The amplification section amplifies the intensity of the reflected light received by the light receiving sensor by the determined amplification quantity. The identification section identifies an external obstacle when the intensity of the amplified reflected light exceeds a predetermined threshold value. The calculation section calculates the position information of the external obstacle based on the timing of identifying the external obstacle, the horizontal synchronizing signal, and the pixel clock signal of the image signal.