Patent ID: 9202415
Filing Date: 2015-12-01
Classification: G09G

Abstract:
1. An organic light emitting diode (OLED) based display device comprising a pixel circuit that includes: an organic light emitting diode (OLED) having an anode and a cathode to be connected electrically to a first power terminal; a transistor having a first terminal, a second terminal that is connected electrically to said anode of said OLED, and a control terminal; a first capacitor having a first terminal and a second terminal that is connected electrically to said control terminal of said transistor; a second capacitor having a first terminal that is connected electrically to said first terminal of said first capacitor, and a second terminal that is connected electrically to said second terminal of said transistor; a first switch having a first terminal that is disposed to receive a data signal, a second terminal that is connected electrically to said first terminal of said first capacitor and said first terminal of said second capacitor, and a control terminal that is disposed to receive a scanning signal, said first switch being operable to switch between a conductive state and a non-conductive state according to the scanning signal received by said first switch; a second switch having a first terminal that is to be connected electrically to a second power terminal, a second terminal that is connected electrically to said first terminal of said transistor, and a control terminal that is disposed to receive an enable signal, said second switch being operable to switch between a conductive state and a non-conductive state according to the enable signal received by said second switch; a third switch having a first terminal that is connected electrically to said first terminal of said transistor, a second terminal that is connected electrically to said control terminal of said transistor, and a control terminal that is disposed to receive a compensation signal, said third switch being operable to switch between a conductive state and a non-conductive state according to the compensation signal received by said third switch; and a switching unit connected electrically to said second terminal of said transistor, disposed to receive the compensation signal, and operable to switch between a conductive state and a non-conductive state according to the compensation signal received by said switching unit; wherein said switching unit is configured to transmit one of the enable signal, voltage at said first terminal of said first capacitor, and a reference signal when said switching unit is operated in the conductive state.