Patent ID: 8638290
Filing Date: 2014-01-28
Classification: H05B

Abstract:
1. A backlight apparatus, comprising: N light emitting element arrays, wherein each of the N light emitting element arrays comprises a predetermined number of light emitting elements, and N is a natural number greater than or equal to 1; N capacitors which are connected in parallel to the N light emitting element arrays; a brightness control signal input unit which receives a brightness control signal to adjust a brightness of the N light emitting element arrays; N first switch units which switch a plurality of currents flowing in the respective N light emitting element arrays, according to the input brightness control signal; N second switch units which switch a plurality of currents flowing in the respective N capacitors, according to the input brightness control signal; a reference current generation unit which generates and outputs a reference current based on the input brightness control signal; and an inverter unit which receives a direct current (DC) from a power factor correction circuit and outputs an input alternating current (AC) and which adjusts a total current supplied to all of the light emitting element arrays in total to be equal to the reference current if the total current is different from the reference current, wherein each of the N first switch units is directly connected in series to a respective one of the N light emitting element arrays and is directly connected to the brightness control signal input unit.