Reflective photoplethysmogram sensor and biological information measurement apparatus
US12268486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2021 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Aug 24, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/681
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is a reflective photoplethysmogram sensor comprising: a planar light emitting element and a planar light receiving element. The light emitting element and the light receiving element do not face each other in an up/down direction. The minimum distance h (mm) between at least a pair of the light emitting element and the light receiving element satisfies the following expression (1) (t×03.7)2≤h≤(t×1.3)2 Expression (1) where the minimum distance between the light emitting element and the light receiving element is h (mm), and a thickness of skin (epidermis+dermis) of a human body is t (mm), and the thickness is within the range 0.1 to 4 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.