Patent ID: 8872867

Claim:
A signal processing device comprising: a measuring unit that measures an actual luminance of a light-emitting device every prescribed update period by setting a plurality of levels of gradation values indicating the degree of light emission to a prescribed pixel circuit having the light-emitting device to thereby generate measurement information in which the gradation value and the measured luminance value are correlated with each other; a gradation deterioration characteristic calculation unit that calculates gradation deterioration characteristic based on the measurement information and a relationship registered in advance between a gradation value and a luminance value when the prescribed pixel circuit is in a correction reference state, wherein a gradation value during measurement and a gradation value in the correction reference state producing the same luminance value are stored in the gradation deterioration information holding unit so as to be correlated with each other; a conversion efficiency deterioration value calculation unit that calculates a conversion efficiency deterioration value regarding deterioration of a conversion efficiency for the light-emitting device of the prescribed pixel circuit to convert a driving current supplied in accordance with a gradation value into a luminance based on the gradation deterioration characteristic to thereby generate conversion efficiency deterioration characteristic information of the prescribed pixel circuit; and a current amount deterioration value calculation unit that calculates a current amount deterioration value regarding deterioration of a driving current of the prescribed pixel circuit based on the gradation deterioration characteristic to thereby generate current amount deterioration characteristic information of the prescribed pixel circuit.