Patent ID: 7535442

Claim:
A pixel circuit disposed at an intersection between a row scan line that supplies a control pulse and a column signal line that supplies a video signal, comprising: a sampling transistor conducting in response to the control pulse supplied from the scan line to sample the video signal supplied from the signal line during a certain sampling period; a capacitance part holding an input potential dependent upon the sampled video signal; a drive transistor supplying an output current during a certain emission period according to the input potential held by the capacitance part, the output current having dependence on a carrier mobility in a channel region of the drive transistor and dependence on a threshold voltage of the drive transistor; a light-emitting element caused, by the output current supplied from the drive transistor, to emit light with a luminance in response to the video signal; and correction means correcting both the dependence of the output current on the carrier mobility and the dependence of the output current on the threshold voltage simultaneously, the pixel circuit including at least the sampling transistor, the capacitance part and the drive transistor, wherein the correction means is connected to the drive transistor and the capacitance part, and operates during a correction period preceding to the sampling period, the correction period being separated into a reset period and a detection period; during the reset period, the correction means energizes the capacitance part to reset the potential held by the capacitance part; during the detection period, the correction means stops the energization and detects a potential difference arising between a source and a gate of the drive transistor during a period when a transient current flows through the drive transistor; and the capacitance part holds a potential corresponding to the detected potential difference, the held potential including both a potential component for reducing influence of the threshold voltage on the output current of the drive transistor, and a potential component for reducing influence of the carrier mobility on the output current of the drive transistor.