{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9767665","patent":{"patent_number":"US-9767665","title":"Optical smoke detection unit for a smoke detector, with two light-emitting diodes optically coupled together and with an associated control unit for the deduction of aging information and a smoke detector","assignee":null,"inventors":[],"filing_date":"2016-08-15T00:00:00.000Z","publication_date":"2017-09-19T00:00:00.000Z","cpc_codes":["H04B","H04B"],"num_claims":14,"abstract":"An optical smoke detection unit, e.g., for a smoke detector, may include first and second light-emitting diodes for emitting monochromatic, dichromatic or polychromatic light, an optical receiver for smoke detection, and a control unit that controls the light-emitting diodes and evaluates a receive signal output by the optical receiver for fire parameters. The light-emitting diodes may be optically coupled together such that at least one of the light-emitting diodes illuminates the other. The control unit may control one light-emitting diode in an alternating fashion and switch the other light-emitting diode to operate as a photodiode, and simultaneously detect a photoelectric current as a measure of emitted luminous flux of the controlled light-emitting diode. The control unit may deduce and output aging information from the light-emitting diode based on the reduction in the photoelectric current and/or alter the control of the light-emitting diode to correct a corresponding reduction in emitted luminous flux."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical smoke detection unit for a smoke detector, with two light-emitting diodes optically coupled together and with an associated control unit for the deduction of aging information and a smoke detector","description":"An optical smoke detection unit, e.g., for a smoke detector, may include first and second light-emitting diodes for emitting monochromatic, dichromatic or polychromatic light, an optical receiver for ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9767665","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9767665","citation_suggestion":"Patentable. \"Optical smoke detection unit for a smoke detector, with two light-emitting diodes optically coupled together and with an associated control unit for the deduction of aging information and a smoke detector\" (US-9767665). https://patentable.app/patents/US-9767665","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9767665","json":"https://patentable.app/api/llm-context/US-9767665","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:36:21.674Z"}