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. 12, 2015
Filed:
Feb. 21, 2012
Kenichi Murakami, Osaka, JP;
Yusuke Hashimoto, Osaka, JP;
Kenichi Murakami, Osaka, JP;
Yusuke Hashimoto, Osaka, JP;
Abstract
The spatial information detection device emits, to a space including an intended area, signal light defined as light modulated with a modulation signal defined as a square wave signal having high and low level periods appearing alternately, each of the periods having its length randomly selected from integral multiples of a unit time period. The device generates signal electric charges by accumulating electric charges generated in response to light from the space in a collection time period determined by a demodulation signal defined as a signal having the same waveform as that of the modulation signal or that of the inverted modulation signal. The device corrects, using correction information regarding an effect caused by light from an unintended area, the amount of signal electric charges as an amount of intended electric charges produced in response to light from the intended area, thereby generating spatial information.