Patent ID: 7277071

Claim:
A luminescent display comprising: a plurality of data lines for transferring thereon a data signal representing an image; a plurality of scan lines, each of the plurality of scan lines transferring a selection signal; a plurality of pixel circuits, each of the plurality of pixel circuits formed at a corresponding pixel of a plurality of pixels defined by the plurality of data lines and the plurality of scan lines; and a power supply line coupled to each of the plurality of pixel circuits, each of the plurality of pixel circuits comprising: a luminescent element for emitting light corresponding to an amount of current applied; a first capacitor; a first transistor having a control electrode thereof coupled to the first capacitor, and a first main electrode thereof coupled to the power supply line; a first switch for diode-connecting the first transistor in response to a selection signal from a previous scan line for a pixel that was previously scanned to charge the first capacitor with a voltage corresponding to a threshold voltage of the first transistor; a second transistor for transferring the data signal from the data lines in response to a selection signal from a present scan line for a pixel that is being presently scanned; a second capacitor coupled between the power supply line and the second transistor for storing a voltage corresponding to the data signal; and a second switch for electrically isolating a second main electrode of the first transistor from the luminescent element during voltage-charging of the first capacitor in response to a control signal, the first transistor supplying a current corresponding to the sum of the voltages charged in the first and second capacitors.