Patent ID: 7485886

Claim:
A light emitting device comprising: a plurality of light emitting elements that emit light to have luminosity depending on the magnitude of a driving signal; a plurality of holding units that are respectively disposed in the plurality of light emitting elements, and respectively hold the driving signal to maintain a certain magnitude to be supplied to a corresponding light emitting element; a plurality of supply units that are respectively disposed in the plurality of light emitting elements, and supply the driving signal, which is held by the holding units for a period of time according to a gradation of light to be emitted, to the corresponding light emitting element; a memory unit that respectively stores signal data indicating the magnitude of the driving signal, which is regulated so that luminosity of the plurality of light emitting elements becomes uniform for the plurality of light emitting elements; a setting unit that sequentially reads the signal data from the memory unit, and generates a setting signal based on the signal data; and an input circuit that sequentially supplies the driving signal having a magnitude depending on the magnitude of the setting signal to the holding units when the setting signal is supplied, and holds the driving signal.