A method of driving a display device capable of obtaining a luminance of constant level irrespective of temperature change is provided. A change in luminance of an EL element due to temperature change is prevented by controlling the luminance of the EL element with current instead of voltage. Specifically,...http://www.google.com/patents/US7277070?utm_source=gb-gplus-sharePatent US7277070 - Light emitting device and method of driving the same