{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8498191","patent":{"patent_number":"US-8498191","title":"Information recording / reproducing method and apparatus, and information reproducing apparatus","assignee":null,"inventors":[],"filing_date":"2010-07-15T00:00:00.000Z","publication_date":"2013-07-30T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":7,"abstract":"An information recording/reproducing method includes: setting light beam power from a light source, to second power P2, which is weaker than first power P1, and detecting the number of the recording layers provided for an optical disc; controlling an objective lens to focus the light beam on one recording layer which is the closest to the objective lens, in a condition that the detected number of the recording layers ≧3; setting the power of the light beam to third power P3, between P1 and P2; specifying the number of the recording layers provided for the optical disc on the basis of layer information, which is information associated with the one recording layer; and setting the power of the light beam to P1, reading the layer type information recorded in advance in the one recording layer, and specifying a disc type based on the read layer type information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Information recording / reproducing method and apparatus, and information reproducing apparatus","description":"An information recording/reproducing method includes: setting light beam power from a light source, to second power P2, which is weaker than first power P1, and detecting the number of the recording l","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8498191","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-8498191","citation_suggestion":"Patentable. \"Information recording / reproducing method and apparatus, and information reproducing apparatus\" (US-8498191). https://patentable.app/patents/US-8498191","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8498191","json":"https://patentable.app/api/llm-context/US-8498191","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T21:13:16.273Z"}