Patent ID: 6998794

Claim:
A device for driving an organic EL display having a driver and a power source for driving a display panel comprising: a photo converter sensing an intensity of external light, and converting the sensed light to an electric signal; an A/D converter converting the electric signal of the photo converter from an analog signal to a digital signal; a comparator comparing the value of the electric signal converted to the digital signal with a preset reference value; a controller controlling at least any one of the driver and the power source according to comparison results; the driver controlling the amount of current applied to the display panel according to a control signal of the controller; the power source controlling the intensity of voltage applied to the driver and the display panel according to the control signal of the controller; and wherein the controller controls the driver to increase the amount of current applied to the display panel when the value of the electric signal is larger than the reference value, and the controller controls the driver to decrease the amount of current applied to the display panel when the value of the electric signal is smaller than the reference value.