Method and device for measuring a lighting level and twilight switch comprising same

The device has a photodiode (P) that is arranged parallel to a switched capacitor (C) on a light sensor (1). The photodiode is operated in the reverse direction. A charging circuit charges the capacitor with a voltage source. The current sources discharge the current to capacitor. A time measuring u...

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Bibliographic Details
Main Author BALDUS, MICHAEL
Format Patent
LanguageEnglish
French
German
Published 12.06.2013
Subjects
COLORIMETRY
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:The device has a photodiode (P) that is arranged parallel to a switched capacitor (C) on a light sensor (1). The photodiode is operated in the reverse direction. A charging circuit charges the capacitor with a voltage source. The current sources discharge the current to capacitor. A time measuring unit measures the discharging times of capacitor. Independent claims are included for the following: (1) method for determining luminance of light in twilight switch; and (2) twilight switch.
Bibliography:Application Number: EP20110194755