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. 07, 2014
Filed:
Sep. 18, 2009
Atsushi Tokura, Osaka, JP;
Atsushi Tokura, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A remote control light receiver receives the infrared rays from an infrared LED incorporated in a remote control unit operated by the user, extracts the signal transmitted from the remote control unit, and outputs the extracted signal to a control microcomputer. The carrier frequency of the signal transmitted from the remote control unit is 38 kHz. A PWM control circuit performs PWM control by using an arbitrary PWM frequency within a range of 300 Hz to 3 kHz. By separating the PWM frequency and the frequency (carrier frequency) of the signal for remote control into different bands, the signal for remote control can be restrained from being affected by the turning on of the light source by PWM control, whereby remote control can be prevented from malfunctioning.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile