Power supply switching device and method as well as projection device applying power supply switching device

The invention relates to a power supply switching device and method as well as a projection device applying the power supply switching device, wherein the power supply switching method comprises the following steps: receiving and comparing voltage the level of a first power supply and the voltage le...

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Bibliographic Details
Main Authors ZHANG YISHUN, WANG MAOAN
Format Patent
LanguageChinese
English
Published 01.06.2011
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
ELECTROGRAPHY
GENERATION
HOLOGRAPHY
PHOTOGRAPHY
PHYSICS
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:The invention relates to a power supply switching device and method as well as a projection device applying the power supply switching device, wherein the power supply switching method comprises the following steps: receiving and comparing voltage the level of a first power supply and the voltage level of a second power supply; utilizing one with the lower voltage level of the first power supply and the second power supply to assist one with the higher voltage level of the first power supply and the second power supply till the one with the higher voltage level of the first power supply and the second power supply is stable; and outputting the one with the higher and stable voltage level of the first power supply and the second power supply to serve as an output voltage.
Bibliography:Application Number: CN200910225846