Patent ID: 7954917

Claim:
An exposure device comprising: a circuit board; a light-emitting element member disposed on the circuit board, the light-emitting element comprising: a plurality of light-emitting elements arranged in a line; and a plurality of switching elements disposed so as to correspond to the plurality of light-emitting elements, wherein when the plurality of switching elements sequentially set the respective light-emitting elements to be in a state where the respective light-emitting elements can turn on, the respective light-emitting elements turn on sequentially; a driving signal generating unit disposed on the circuit board, the driving signal generating unit that generates driving signals for driving the respective light-emitting elements arranged in the light-emitting element member; a first voltage supply unit disposed on the circuit board, the voltage supply unit that supplies a first predetermined voltage to the light-emitting element member; and a second voltage supply unit disposed on the circuit board, the second voltage supply unit that converts the first predetermined voltage supplied from the first voltage supplyunit into a second predetermined voltage and supplies the second predetermined voltage to the driving signal generating unit.