Patent ID: 7978170

Claim:
A driving apparatus of a backlight, comprising: a controller for controlling square wave oscillation; a square wave oscillator for oscillating a constant square wave signal in accordance with a square wave oscillation control signal from the controller; and a signal generator for generating a burst dimming signal using the square wave signal, wherein the controller provides a square wave generation execution program for controlling generation of the constant signal, wherein the square wave generation execution is carried out in accordance with a user's command, if the square wave generation execution program is carried out, then the controller outputs the square wave oscillation control signal for generating the constant square wave signal to the square wave oscillator, wherein the signal generator includes an inverter, wherein the signal generator includes an integrator for converting the constant square wave signal from the square wave oscillator into a triangular wave signal and a comparator for comparing the triangular wave signal converted by the integrator with a direct current voltage to generate the burst dimming signal, wherein the direct current voltage has level of 0V to 3.3V from the controller, wherein the triangular wave signal is supplied to an inverting input terminal of the comparator and the direct current voltage is supplied to a non-inverting input terminal of the comparator, wherein the comparator generates a first signal with a low level when the triangular wave signal is greater than the direct current voltage and a second signal with a high level when the triangular wave signal is smaller than the direct current voltage, wherein the integrator includes a resistance connected between an output terminal of the square wave oscillator and an input terminal of the comparator, and a capacitor in which an electrode of the capacitor is commonly connected to the input terminal of the comparator and another electrode of the capacitor connected a ground, and wherein the square wave oscillator is configured to output a constant square wave signal regardless of the internal temperature of the inverter by being installed outside of the inverter.