Patent ID: 7924246
Filing Date: 2011-04-12
Classification: G09G

Abstract:
1. A pixel circuit that makes an electro-optical element emit light and that receives a pixel signal, a ramp level signal and a signal corresponding to a light-emitting period of the electro-optical element, the pixel circuit comprising: a drive current path having a current valve; a first transistor inserted in the driving current path of the electro-optical element; a current value setting circuit that sets the current value of the driving current path; a level holder that stores the level of the pixel signal; a comparison circuit that compares the level of the stored pixel image signal and the ramp level signal, outputs a comparison result and controls the operation time of the first transistor based on the comparison result; a second transistor that is arranged in the driving current path in series with the first transistor and is conductively controlled by the signal corresponding to the light-emitting period of the electro-optical element; and a drive transistor that supplies a drive current corresponding to the current valve of the driving current path of the electro-optical element; the comparison circuit including: