{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11494897","patent":{"patent_number":"US-11494897","title":"Application to determine reading/working distance","assignee":null,"inventors":[],"filing_date":"2018-06-29T00:00:00.000Z","publication_date":"2022-11-08T00:00:00.000Z","cpc_codes":["G06T","A61B","A61B","A61B","A61B","G06T","G06T","G06T","G06T","G16H","G16H","G16H","G16H","G16H","G06T","G06T","G06T"],"num_claims":24,"abstract":"A method of measuring working distance between a handheld digital device and eyes of a user, including capturing an image of at least eyes of a user via an onboard camera of the handheld digital device while the user is viewing a display of the handheld digital device and comparing an apparent angular size of a structure of the eyes or face of the user to a previously captured image of the structure of the eyes or the face that was taken in the presence of an object of known size. The method further includes calculating a working distance based on the apparent angular size of the structure of the eyes or the face; and saving at least the working distance to memory or reporting out the calculated working distance on the display. A handheld digital device programmed with an algorithm to perform the method is also included."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Application to determine reading/working distance","description":"A method of measuring working distance between a handheld digital device and eyes of a user, including capturing an image of at least eyes of a user via an onboard camera of the handheld digital devic","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11494897","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-11494897","citation_suggestion":"Patentable. \"Application to determine reading/working distance\" (US-11494897). https://patentable.app/patents/US-11494897","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11494897","json":"https://patentable.app/api/llm-context/US-11494897","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T01:35:39.070Z"}