LUMINANCE ADJUSTING DEVICE

A luminance adjusting device for an illuminator utilizes a circuitry to control the brightness of the illuminator, wherein power is stored in a power storage through a step-down circuit. The illuminator has a preset brightness. The preset brightness is done by the calculating processor to run accord...

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Bibliographic Details
Main Author HUANG MEI-YUEH
Format Patent
LanguageEnglish
Published 09.06.2011
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:A luminance adjusting device for an illuminator utilizes a circuitry to control the brightness of the illuminator, wherein power is stored in a power storage through a step-down circuit. The illuminator has a preset brightness. The preset brightness is done by the calculating processor to run according to an analyzed data received from a sampling frequency circuit to control a pulse modulator for driving the illuminator to emit light. The power switch is turned off and on again shortly, which triggers the calculating processor to control the pulse modular to drive the illuminator to change the preset brightness, so that the brightness of the illuminator is controlled by the time differentials of the power switch's on and off.
Bibliography:Application Number: US20090634611