Patent ID: 7456580
Filing Date: 2008-11-25
Classification: G09G

Abstract:
1. A light emitting device comprising: a light emitting diode emitting light due to an output current; a storage capacitor storing a data signal supplied by a data line; a driving thin film transistor (TFT) connected between a supply voltage and the light emitting diode and having a gate connected to one end of the storage capacitor to supply the output current to the light emitting diode using the data signal stored in the storage capacitor; an input switch connected between the one end of the storage capacitor and the data line and having a gate connected to a first scan line to transmit the data signal supplied by the data line in response to a first scan signal supplied by the first scan line; and a threshold voltage compensator connected between the gate and a drain of the driving TFT and having a gate connected to a second scan line to temporarily store at the storage capacitor a gate voltage reflecting a threshold voltage of the driving TFT in response to a second scan signal supplied by the second scan line and to transmit the data signal regardless of variations in the threshold voltage of the driving TFT when the output current is supplied to the light emitting diode.