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:
Nov. 22, 2022
Filed:
Jun. 13, 2022
Aleddra Inc., Renton, WA (US);
Chungho Hsia, Bellevue, WA (US);
Aleddra Inc., Renton, WA (US);
Abstract
A light-emitting diode (LED) lamp comprising a normally-operated portion and an emergency-operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally-operated portion comprises a second driving circuit whereas the emergency-operated portion comprises a rechargeable battery, a first driving circuit, a self-diagnostic circuit, and a control circuit. The LED lamp can auto-switch between the normal mode and an emergency mode according to availability of the AC mains and whether a rechargeable battery test is initiated. The control circuit is configured to produce a pulse train with a predetermined duty cycle to operate the first driving circuit while disabling the second driving circuit to eliminate operational ambiguity during the rechargeable battery test. The self-diagnostic circuit is configured to provide multiple sequences and to auto-evaluate battery performance by sending the pulse train to operate the first driving circuit according to the multiple sequences.