Patent ID: 7050023

Claim:
A display device having a plurality of display pixels, each of the display pixels comprising: an electroluminescent element; a first thin film transistor, a source of the first thin film transistor being connected to the electroluminescent element; a driving source supplying a driving voltage to a drain of the first thin film transistor; and a second thin film transistor receiving a video signal at a drain thereof and supplying the video signal to a gate of the first thin film transistor in response to a gate signal; wherein an upper limit of the driving voltage is determined so that a brightness of the electroluminescent element is lower than a first standard brightness when the video signal is at a black signal level and turns on the first thin film transistor, and a lower limit of the driving voltage is determined so that the brightness of the electroluminescent element is higher than a second standard brightness when the video signal is at a white signal level.