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:
Oct. 18, 2022
Filed:
Feb. 26, 2021
Building Robotics, Inc., Oakland, CA (US);
Michael N. Gershowitz, San Jose, CA (US);
Samuel Leung, Santa Clara, CA (US);
Building Robotics, Inc., Oakland, CA (US);
Abstract
There is described an emergency lighting system for minimizing power leakage to assure proper operation of an emergency mode. The system comprises a digital addressable lighting bus having digital control lines, a driver, and a lighting control. The driver receives emergency power and provides the emergency power to a light emitter in response to detecting that the digital control lines are shorted. The lighting control receives normal power and includes a relay contact that shorts the digital control lines in response to detecting lack of the normal power. For another aspect, the driver and the lighting control are coupled to lighting control lines, which are either digital or analog control lines. For yet another aspect, a control bypass comprises a power unit, a relay coil, and a relay contact. The relay contact manages outputs of the power unit in response to activation and de-activation by the relay coil.