{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9613572","patent":{"patent_number":"US-9613572","title":"Controller and method for dimming light-emitting diodes","assignee":null,"inventors":[],"filing_date":"2015-06-09T00:00:00.000Z","publication_date":"2017-04-04T00:00:00.000Z","cpc_codes":["G09G","G09G","G09G","G09G"],"num_claims":12,"abstract":"A controller for dimming light-emitting diodes includes a pulse width modulation pin, a low-pass filter, a frequency detection unit, and a control signal generation module. The low-pass filter generates a direct current signal according to a pulse width modulation signal generated by a micro-controller. The frequency detection unit generates a logic value according to a threshold and the pulse width modulation signal. The control signal generation module generates a switch control signal to a first switch connected to the light-emitting diodes in series according to the direct current signal, the logic value, a reference voltage, and the pulse width modulation signal. When a frequency of the pulse width modulation signal is lower than the threshold, the controller enters a digital dimming mode; and when the frequency of the pulse width modulation signal is higher than the threshold, the controller enters an analog dimming mode."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Controller and method for dimming light-emitting diodes","description":"A controller for dimming light-emitting diodes includes a pulse width modulation pin, a low-pass filter, a frequency detection unit, and a control signal generation module. The low-pass filter generat","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9613572","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-9613572","citation_suggestion":"Patentable. \"Controller and method for dimming light-emitting diodes\" (US-9613572). https://patentable.app/patents/US-9613572","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9613572","json":"https://patentable.app/api/llm-context/US-9613572","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:50:28.558Z"}