Patent ID: 7777705

Claim:
An organic light emitting diode (OLED) driving device, comprising: a first switch, wherein a first end of the first switch is used to receive a data signal, and a control end of the first switch is used to receive a first scan signal; a first transistor, wherein a first end of the first transistor is electrically directly connected to a second end of the first switch, and a control end of the first transistor is electrically directly connected to a second end of the first transistor; a second switch, wherein a first end of the second switch is used to receive a voltage signal, and a control end of the second switch is used to receive a second scan signal; a capacitor, wherein a first end of the capacitor is electrically directly connected to a second end of the second switch, and a second end of the capacitor is electrically directly connected to the second end of the first transistor; a second transistor, wherein a control end of the second transistor is electrically directly connected to the second end of the first transistor and the second end of the capacitor, a first end of the second transistor is electrically directly connected to a first reference voltage, and a second end of the second transistor is used to generate a driving current so as to drive an OLED; and a third switch, wherein a first end of the third switch is electrically directly connected to the second end of the second transistor, a control end of the third switch is used to receive the second scan signal, and a second end of the third switch is electrically directly connected to a first end of the OLED, wherein a second end of the OLED is electrically directly connected to a second reference voltage.