Patent ID: 8976091
Filing Date: 2015-03-10
Classification: G09G

Abstract:
1. A display, comprising: a panel, comprising a plurality of organic light-emitting diode (OLED) pixels, each OLED pixel comprising: an OLED; a driving transistor, having a first terminal coupled to an anode of the OLED, a second terminal for receiving an operating voltage, and a control terminal for receiving a data voltage; a switch transistor, having a first terminal coupled to the control terminal of the driving transistor, a second terminal for receiving the data voltage, and a control terminal for receiving a first control signal; a first compensation block, coupled to the first terminal and the control terminal of the driving transistor; and a second compensation block, coupled to the first terminal of the driving transistor, for receiving the first control signal and the data voltage, wherein: in a reset phase, the first compensation block is reset to have a reference voltage and the data voltage, and the first control signal cuts off the driving transistor via the switch transistor and the second compensation block; in a compensation phase, the second compensation block couples a potential at the first terminal of the driving transistor to a low-level voltage, so that the driving transistor becomes floating on and discharges until cutoff, and the first compensation block maintains a voltage difference between the voltage at the first terminal of the cutoff driving transistor and the reference voltage as well as the data voltage; and in a light-emitting phase, the OLED is turned on, so that the voltage at the first terminal of the driving transistor is a driving voltage, and the first compensation block feeds the voltage difference between the voltage at the first terminal of the cutoff driving transistor and the reference voltage in the compensation phase as well as the driving voltage back to the control terminal of the driving transistor.