Patent ID: 8319711

Claim:
An emission apparatus comprising: an emission element; a pixel drive circuit connected to the emission element; a data line connected to the pixel drive circuit; and an emission drive apparatus that, in a selection period: (i) lets a reference current with a predetermined current value flow to the pixel drive circuit via the data line, (ii) derives a compensation voltage which is a difference between a potential that varies according to a unique characteristic of the pixel drive circuit and a predetermined reference potential, and (iii) generates a correction gradation voltage to be applied to the pixel drive circuit based on the compensation voltage for causing the emission element to emit light at an appropriate luminance gradation, the emission drive apparatus comprising: a current source that lets the reference current flow into the pixel drive circuit; a voltage subtracting unit that derives the compensation voltage by computing the difference between the potential which is generated at the data line when the reference current is let to flow into the pixel drive circuit and the predetermined reference potential; a switch that selectively connects the current source and the voltage subtracting unit to the data line; a voltage latch unit that temporarily holds the compensation voltage computed by the voltage subtracting unit; a gradation voltage generation unit that generates a gradation voltage according to emission data; and a voltage setting unit that computes the correction gradation voltage by adding the gradation voltage generated by the gradation voltage generation unit and the compensation voltage held by the voltage latch unit, when recognizing that a luminance gradation of the emission data is not a luminance gradation of no emission, wherein the voltage setting unit outputs the gradation voltage generated by the gradation voltage generation unit without adding the compensation voltage held by the voltage latch unit, when recognizing that the luminance gradation of the emission data is the luminance gradation of no emission.