{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8494395","patent":{"patent_number":"US-8494395","title":"Power supply unit, image forming apparatus and power supply control method","assignee":null,"inventors":[],"filing_date":"2010-11-24T00:00:00.000Z","publication_date":"2013-07-23T00:00:00.000Z","cpc_codes":["H02M"],"num_claims":13,"abstract":"A power supply unit includes a switching circuit that drives a switching device by a duty ratio corresponding to a target voltage output value and outputs an alternating current signal; a coupling capacitance element provided in a subsequent stage with respect to the switching circuit; a voltage transformation unit that increases a voltage of the alternating current signal input by using the switching circuit, and outputs a high-voltage alternating current voltage to an electrifying unit; a charging unit that charges the coupling capacitance element in response to a power supply voltage being turned on; and a control unit that controls driving of the switching device to cause the coupling capacitance element to be charged to a predetermined charged amount before the switching circuit starts outputting the alternating current signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Power supply unit, image forming apparatus and power supply control method","description":"A power supply unit includes a switching circuit that drives a switching device by a duty ratio corresponding to a target voltage output value and outputs an alternating current signal; a coupling cap","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8494395","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-8494395","citation_suggestion":"Patentable. \"Power supply unit, image forming apparatus and power supply control method\" (US-8494395). https://patentable.app/patents/US-8494395","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8494395","json":"https://patentable.app/api/llm-context/US-8494395","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T07:15:52.983Z"}