{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8531765","patent":{"patent_number":"US-8531765","title":"Circularly polarizing plate and display device","assignee":null,"inventors":[],"filing_date":"2009-08-05T00:00:00.000Z","publication_date":"2013-09-10T00:00:00.000Z","cpc_codes":["G02F","G02F","G02F","G02F","G02F","G02F","G02F"],"num_claims":14,"abstract":"The present invention provides at low cost a display device with superior visibility and high contrast ratio even in a bright room environment through a reduction in the undesired reflection, not only of the incident outside light from the normal direction, but also of the outside incident light from an oblique direction. The present invention is a circularly polarizing plate including a polarizer and a λ/4 plate, and the aforementioned circularly polarizing plate includes an anti-reflective layer, the aforementioned polarizer, a birefringent layer, and the aforementioned λ/4 plate which are laminated in this order, the NZ coefficient of the aforementioned birefringent layer satisfies NZ<0.1, the in-plane fast axis of the aforementioned birefringent layer is orthogonal to the absorption axis of the aforementioned polarizer, the NZ coefficient of the aforementioned λ/4 plate satisfies NZ>0.9, and the in-plane slow axis of the aforementioned λ/4 plate intersects the absorption axis of the aforementioned polarizer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Circularly polarizing plate and display device","description":"The present invention provides at low cost a display device with superior visibility and high contrast ratio even in a bright room environment through a reduction in the undesired reflection, not only","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8531765","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-8531765","citation_suggestion":"Patentable. \"Circularly polarizing plate and display device\" (US-8531765). https://patentable.app/patents/US-8531765","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8531765","json":"https://patentable.app/api/llm-context/US-8531765","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T01:31:20.074Z"}