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:
May. 30, 2017
Filed:
Aug. 15, 2016
Siemens Schweiz Ag, Zurich, CH;
Hans Aebersold, Bonstetten, CH;
SIEMENS SCHWEIZ AG, Zurich, CH;
Abstract
An optical smoke detection unit for a danger alarm includes a light-emitting diode (LED) including at least one LED chip in an LED housing and connection contacts contacting the LED chip and running out of the LED housing. The smoke detection unit may include a photo-detector spectrally sensitive to emitted light for detecting smoke and a control unit for controlling the LED and for evaluating a sensor signal of the photo-detector for characteristic fire magnitudes. The LED may include a photosensor spectrally sensitive to the emitted light. The control unit may detect an electrical characteristic magnitude of the photosensor while providing electrical control of the LED, and based on the detected electrical characteristic magnitude, (a) derive and output ageing information about the LED and/or (b) determine a reduction of light current of the LED and modify the electrical control of LED to correct such reduction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile