| 摘要 |
PURPOSE: An active organic electroluminescence display is provided to improve the non-uniformity of brightness occurred in each pixel by compensating a panel threshold voltage. CONSTITUTION: A source terminal of a first TFT(Thin Film Transistor)(310) receives a data signal from a source line and a gate terminal thereof receives a gate enable signal from a gate enable line. A threshold voltage compensator(320) receives power from a power line and charges a driving threshold voltage through the power. When receiving the data signal, the threshold voltage compensator(320) adds the driving threshold voltage to the data signal to output a threshold-voltage-compensated data signal. A source terminal of a second TFT(330) receives power from the power line and a gate terminal thereof receives the threshold-voltage-compensated data signal from the threshold voltage compensator(320). A first terminal of a first capacitor(340) is connected to the source terminal of the second TFT(330) and a second terminal thereof is connected to the threshold voltage compensator(320) to charges a driving voltage of the second TFT(330). A whole panel control switch(350) switches a driving current inputted from the second TFT(330) under the control of a third switch control signal. A first terminal of an organic electroluminescence device(360) is connected to the whole panel control switch(350) and a second terminal thereof is grounded to emit lights when the driving current flows.
|
