Patent ID: 9125249
Filing Date: 2015-09-01
Classification: G09G

Abstract:
1. A pixel circuit comprising: a light emitting device including an organic light emitting cell formed between an anode electrode and a cathode electrode, wherein the light emitting device emits light by an electric current applied thereto; a driving transistor which controls an operation of the light emitting device according to a voltage applied between gate and source terminals; a capacitor including first and second terminals, wherein the first terminal is selectively supplied with a reference voltage and a data voltage of a data line, and the second terminal is connected with a first node corresponding to the gate terminal of the driving transistor; and a switching unit which initializes the capacitor during a current horizontal period, stores a sampling voltage including the data voltage and a threshold voltage of the driving transistor in the capacitor, and makes the light emitting device emit light on the basis of the sampling voltage stored in the capacitor whenever the data voltage and reference voltage are supplied to the data line after the current horizontal period, wherein the reference voltage and the data voltage are alternately supplied to the data line.