Patent ID: 8294643

Claim:
A pixel of a display, comprising: a switch circuit for receiving a data signal, and providing a first and a second current according to the data signal when a scanning signal is enabled; a first transistor for receiving the first current and being coupled to a node; a second transistor for receiving a first constant voltage and being coupled to the node; a switch for receiving a second constant voltage and controlled by a controlling signal corresponding to the scanning signal, wherein the switch is controlled by the controlling signal; and when the switch turns on, the switch conducts the second constant voltage to the first transistor, and the first transistor is in an on or off state according to a voltage on the node, and the current from the switch flows through the first transistor when the switches turns on and the first transistor is in the on state; a capacitor for receiving the second current, the currents outputted from the first and second transistors corresponding to the voltage across the capacitor, wherein the first current and the second current vary with the voltage across the capacitor; and a lighting emitting element coupled to the node for receiving the current outputted from the first transistor and the second transistor, so that the light emitting element generates luminance corresponding to the data signal when the switch turns on.