Patent ID: 8643570

Claim:
An active matrix organic electroluminescence display comprising: a plurality of selection lines and a plurality of data lines which are mutually crossed; and a plurality of pixel circuits, each of which is connected to one of the plurality of selection lines and one of the plurality of data lines and includes a driving transistor, switching devices, a storage capacitor and an organic electroluminescence device, wherein a frame period is constituted by a selection period in which a selection signal is applied to the selection line to which the pixel circuit is connected and a non-selection period in which the selection signal is not applied to the selection line to which the pixel circuit is connected, wherein the selection period includes a first part and a second part, wherein in the first part of the selection period, a first data signal is supplied through the data line to the selected pixel circuit and held as a voltage at the storage capacitor of the selected pixel circuit, wherein in the first part of the selection period and a part or all of the non-Selection period, a first current according to the voltage held at the storage capacitor is supplied to the organic electroluminescence device so that the organic electroluminescence device emits light at luminance according to the first current, wherein in the second part of the selection period, a second current according to a second data signal is supplied through the data line to the organic electroluminescence device of the selected pixel circuit so that the organic electroluminescence device of the selected pixel circuit emits light at luminance according to the second current, and wherein luminance according to the first current is cumulated in the frame period to represent one of the discrete gradation levels corresponding to the first data signal and luminance according to the second current is cumulated in the frame period to represent gradation between steps of the discrete gradation levels corresponding to the second data signal.