Bio illuminance measuring device for determining circadian action

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11326938
APP PUB NO 20200232844A1
SERIAL NO

16525190

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Disclosed is a bio illuminance measuring apparatus including a circadian lambda filter passing external light along according to a circadian rhythm sensitivity curve, a visual lambda filter passing the external light along according to a visual sensitivity curve, a photo sensing portion sensing and converting the external light, which has passed through the circadian lambda filter, into a circadian wavelength signal and sensing and converting the external light, which has passed through the visual lambda filter, into a visual wavelength signal, and an illuminance calculating portion which calculates a ratio between the circadian wavelength signal and the visual wavelength signal, calculates a circadian action factor by applying the ratio between the circadian wavelength signal and the visual wavelength signal to a circadian action function which varies according to the visual wavelength signal, and calculates a bio illuminance value of the external light on the basis of the circadian action factor.

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Patent Owner(s)

Patent OwnerAddress
KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION77 JEONGNEUNG-RO SEONGBUK-GU SEOUL 02707 02707

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kim, Dae Jeong Seoul, KR 12 109
Mo, Hyun Sun Seoul, KR 5 78

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