Patent ID: 7800565
Filing Date: 2010-09-21
Classification: G09G

Abstract:
1. A method of programming and driving a display system, the display system includes: a display array having a plurality of pixel circuits arranged in row and column, each pixel circuit having: a light emitting device having a first terminal and a second terminal; a driving transistor having a gate terminal, a first terminal and a second terminal, the first terminal of the driving transistor being connected to the first terminal of the light emitting device, either the second terminal of the light emitting device or the second terminal of the driving transistor being connected to a controllable voltage supply line having a voltage and the other being connected to a voltage supply electrode; a first capacitor and a second capacitor connected in series between the gate terminal of the driving transistor and a potential, each having a first terminal and a second terminal; a first switch transistor having a gate terminal, a first terminal and a second terminal, the gate terminal of the first switch transistor being connected to a first select line, the first terminal of the first switch transistor being connected to the first terminal of the driving transistor, the second terminal of the first switch being connected to the first terminal of the first capacitor and the gate terminal of the driving transistor; a second switch transistor having a gate terminal, a first terminal and a second terminal, the gate terminal of the second switch transistor being connected to a second select line, the first terminal of the second switch transistor being connected to a signal line having a voltage, the second terminal of the second switch transistor being connected to the second terminal of the first capacitor and the first terminal of the second capacitor; the method comprising the steps of: in a programming cycle having a plurality of operation cycles comprising a first operating cycle, a second operating cycle, a third operating cycle and a fourth operating cycle, setting the voltage on the controllable voltage supply line to at least a first voltage level and a second voltage level and setting the voltage on the signal line to at least a third voltage level, a fourth voltage level, and a fifth voltage level during the plurality of operation cycles to store a voltage associated with a threshold voltage of the driving transistor and a programming voltage in the first capacitor; in a driving cycle, applying the voltage stored in the first capacitor to the gate terminal of the driving transistor.