Apparatus for measuring circadian illuminance
US11009392B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jul 15, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jul 15, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0233
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure provides a circadian illuminance measuring apparatus including: a circadian lambda filter configured to pass external light according to a circadian sensitivity curve; a light sensor configured to sense the external light has passed through the circadian lambda filter, convert the external light into an analog signal, and output the analog signal; and a circadian illuminance calculator configured to convert the analog signal into a digital signal to calculate circadian illuminance of the external light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.