一種主動矩陣顯示器裝置的畫素電路及其驅動方法

Abstract

本發明係有關於一種主動矩陣顯示器裝置的畫素電路及其驅動方法，其係以全數位訊號藉由電阻與電晶體，控制預充之畫素電壓放電，而達到所欲灰階。畫素電路包含：第一開關，其控制端係耦合於掃描線，第二開關之第二端耦合於第一開關之第一端，第二開關之第一端耦合第一電源，第二開關之控制端耦合資料線。第三開關之第二端耦合第二電源，儲能元件之第一端耦合於第三開關之第一端，電阻耦合於第一開關之第二端與第三開關之第一端間，藉由控制第三開關，以對儲能元件之第一端預充電至第二電源之電壓值，並控制第一開關與第二開關開啟，以使儲能元件之第一端往第一電源放電，當該儲能元件之該第一端達到所設定之畫素電壓時，關閉該第二開關。 Provided is the pixel circuit for active matrix display apparatus and the driving method thereof, which is controlled by digital signal. The pre-charge pixel voltage is controlled and discharged by controlling the resistor and transistors, so that the desired grey scale is generated. The pixel circuit includes: a first switch, a second switch, a third switch a energy storage device and resistor. The control end of first switch is coupled to scan line. The second end of the second switch is coupled to the first end of the first switch. The first end of the second switch is coupled to the first source. The control end of the second switch is coupled to the data line. The second end of the third switch is coupled to the second source. The first end of the energy storage device is coupled to the first end of the third switch. The resistor is coupled to the second end of the first switch and the first end of the third switch. By controlling the third switch, the first end of the energy storage device is charged to the voltage of the second source. The first switch and the second switch are controlled to switch on, so that the first end of the energy storage device discharging to the first source. The second switch switches off when the first end of the energy storage device reaches the desired pixel voltage.