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:
Jan. 19, 2010
Filed:
Jun. 01, 2007
Keiji Oura, Tokyo, JP;
Kenji Suzuki, Tokyo, JP;
Hiroyuki Kobayashi, Tokyo, JP;
NEC Display Solutions, Ltd., Tokyo, JP;
Abstract
A distance measuring system comprising: a transmitter that simultaneously emits an infrared radiation and an ultrasonic wave; and a receiver that include a table showing a relationship between an arrival time, indicative of a period from detection of the received infrared radiation to detection of the received ultrasonic wave, and a required received signal strength of the ultrasonic wave corresponding to the arrival time when the ultrasonic wave is directly received, that compares the received signal strength of the ultrasonic wave with a required received signal strength corresponding to the arrival time retrieved from the table, and that calculates the distance to the transmitter based on the arrival time when the received signal strength of the ultrasonic wave is higher than the required received signal strength corresponding to the arrival time retrieved from the table.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile