Patent ID: 6774574
Filing Date: 2004-08-10
Classification: G09G,H01L

Abstract:
An EL display device having a pixel unit, a data signal-side drive circuit and a gate signal-side drive circuit formed by TFTs over a substrate, wherein a resistor is provided between a current control TFT and an EL element formed in the pixel unit, andwherein a data signal input to the data signal-side drive circuit or to the gate signal-side drive circuit, is formed through; first means which divides a frame into n sub-frames (SF1, SF2, SF3, . . . , SF(nâˆ’1), SF(n)) corresponding to gradations of n bits (n is an integer of not smaller than 2);second means which selects an address period (Ta) and a sustain period (Ts: sustain periods Ts1, Ts2, Ts3, . . . , Ts (nâˆ’1), Ts(n) corresponding to SF1, SF2, SF3, . . . , SF(nâˆ’1), SF(n)) in said n sub-frames; and third means for so setting the sustain periods as to be Ts1:Ts2:Ts3: . . . :Ts(nâˆ’1):Ts(n)=20:2âˆ’1:2âˆ’2: . . . :2âˆ’(nâˆ’2):2âˆ’(nâˆ’1) in the n sub-frames.