Patent ID: 8525422
Filing Date: 2013-09-03
Classification: G09G,H05B

Abstract:
1. A backlight apparatus comprising: a plurality of light emitting diode modules, each of the light emitting diode modules comprising: wherein the driving circuit is a direct current to direct current power converter, and the direct current to direct current power converter comprises: an inductor, an end of the inductor receiving an input voltage; a semiconductor pseudo switch serially connected between the other end of the inductor and a base voltage, the semiconductor pseudo switch being controlled by a pulse width modulation signal; a first diode, an anode of the first diode being commonly coupled to the inductor and the semiconductor pseudo switch, a cathode of the first diode generating the driving signal; a voltage detecting circuit receiving the driving signal and generating an over voltage protecting signal by dividing a voltage of the driving signal; and a controller receiving an operating voltage, a feedback signal, the over voltage protecting signal, an enabling signal, and a dimming signal, wherein the controller generates the pulse width modulation signal based on the feedback signal and the dimming signal when the enabling signal is enabled.