Patent ID: 8026876

Claim:
A method of compensating for luminance degradation of a pixel having an electroluminescent device, the method comprising: determining the capacitance of the electroluminescent device; correlating the determined capacitance of the electroluminescent device to a current correction factor for the electroluminescent device; compensating a drive current for the electroluminescent device according to the correlated current correction factor; and driving the electroluminescent device with the compensated drive current; wherein the step of determining the capacitance of the electroluminescent device comprises: charging the capacitance of the electroluminescent device to a first voltage V 1 ; charging a parasitic capacitance to a second voltage V 2 ; electrically connecting the parasitic capacitance and the capacitance of the electroluminescent device in parallel; and measuring a voltage change, ΔV, across a read capacitor of capacitance C read ; wherein the capacitance of the electroluminescent device is equal to: ( Δ ⁢ ⁢ V ) ⁢ ( C read ) V ⁢ ⁢ 2 - V ⁢ ⁢ 1 .