A pixel device of an electroluminescence device that comprises a voltage
signal having a first state and a second state, a current signal, a first
circuit further comprising a first transistor, a second transistor and a
capacitor, the capacitor including a first terminal coupled to a power
supply, the first transistor including a gate electrode coupled to a
second terminal of the capacitor, and the second transistor including a
gate electrode receiving the voltage signal, wherein the first circuit
provides a voltage level across the capacitor in response to the first
state of the voltage signal, and maintains the voltage level in response
to the second state of the voltage signal, and a second circuit further
comprising a third transistor and a fourth transistor, the third
transistor including a gate electrode coupled to a gate electrode of the
fourth transistor, wherein the second circuit provides a current
proportional to the magnitude of the current signal in response to the
first state of the voltage signal, and the first circuit provides a sum
current of the proportional current and the current signal.