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:
Sep. 12, 2006
Filed:
Jun. 30, 2004
Michael John Collins, Longmont, CO (US);
Michael John Collins, Longmont, CO (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A boost regulator circuit with soft-start is arranged for high-frequency pulse width modulation of LED current. When a shutdown signal is asserted, all circuitry in the boost regulator circuit is disabled, except for circuitry needed for a shutdown delay timer. Also, when the shutdown signal is asserted, the shutdown delay timer begins. If the shutdown signal is de-asserted before the shutdown delay timer expires, the boost regulator circuit resumes normal operation and soft-start is not employed. If the timer expires before the shutdown signal is de-asserted, a soft-start timer is reset, and the entire boost regulator circuit is disabled. When the shutdown signal is de-asserted after the soft-start timer is reset, soft-start is employed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile