Patent ID: 7119496
Filing Date: 2006-10-10
Classification: H05B

Abstract:
1. Power supply arrangement for supplying power to a plurality of back and/or edge illumination devices ( 5 ) in a liquid crystal display unit (LCD) ( 1 ), comprising: a mains connection ( 7 ), a power converter ( 6 ), and at least one inverter ( 8 ), the power converter ( 6 ) having an input directly coupled to the mains connection ( 7 ) and having a first output coupled to an input of the at least one inverter ( 8 ), the power converter ( 6 ) being arranged to convert an AC voltage input to a power converter ( 6 ) DC voltage output, said power converter ( 6 ) DC voltage output being supplied to an input of the at least one inverter ( 8 ), the at least one inverter ( 8 ) being arranged to convert said power converter ( 6 ) DC voltage output to a AC output voltage level adequate for driving said illumination devices ( 5 ), and in that said at least one inverter ( 8 ) is provided with mains isolation via said power converter ( 6 ), the power supply arrangement further comprising a circuit power supply ( 9 ), connected to a second output of said power converter ( 6 ), and arranged to generate voltage levels required by circuitry ( 4 ) in the LCD, said circuit power supply ( 9 ) also being provided with mains isolation via said power converter ( 6 ).