{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9851489","patent":{"patent_number":"US-9851489","title":"Viewing angle switchable back light unit","assignee":null,"inventors":[],"filing_date":"2016-06-16T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["G02F"],"num_claims":12,"abstract":"The present disclosure relates to a viewing angle switchable back light unit in which the general mode and the privacy mode in a liquid crystal display can be selected. The present disclosure suggests a thin film type back light unit comprising: a light guide film including a light entering part disposed at one side, a light changing part disposed at other side and a light guiding part connecting the light entering part and the light changing part; a light radiating part disposed on an upper surface of the light guide film; and a light source disposed at the light entering part of the light guide film. The light entering part includes a wedge light coupler and a light deflection element. The light changing part includes a light reflecting pattern. The light radiating part includes a light radiating film providing some of the collimated lights as back lights."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Viewing angle switchable back light unit","description":"The present disclosure relates to a viewing angle switchable back light unit in which the general mode and the privacy mode in a liquid crystal display can be selected. The present disclosure suggests","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9851489","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-9851489","citation_suggestion":"Patentable. \"Viewing angle switchable back light unit\" (US-9851489). https://patentable.app/patents/US-9851489","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9851489","json":"https://patentable.app/api/llm-context/US-9851489","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:58:59.972Z"}