Patent ID: 7317435
Filing Date: 2008-01-08
Classification: G09G,H05B,Y02B

Abstract:
1. A pixel driving circuit for use in an active matrix organic light-emitting diode with threshold voltage compensation, comprising: a transistor; an organic light-emitting diode coupled to said transistor; a first capacitor having a first and a second ends, said first end being coupled to a gate electrode of said transistor; and a second capacitor having a third and a fourth ends coupled to said second end of said first capacitor and a ground voltage, respectively; wherein a threshold voltage of said transistor is stored in said first capacitor in a first state, a driving voltage received from a data line is stored in said second capacitor in a second state, and said gate electrode of said transistor is biased with a specified voltage applied to said first and said second capacitors interconnected in series in a third state, thereby controlling a current passing through said organic light-emitting diode.