| 摘要 |
An exposure device includes a circuit board, a light-emitting element member, a driving signal generating unit and a first voltage supply unit. The light-emitting element member is disposed on the circuit board. The light-emitting element includes plural light-emitting elements arranged in a line and plural switching elements disposed so as to correspond to the plural light-emitting elements. When the plural 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. The driving signal generating unit is disposed on the circuit board. The driving signal generating unit generates driving signals for driving the respective light-emitting elements arranged in the light-emitting element member. The first voltage supply unit is disposed on the circuit board. The voltage supply unit supplies a first predetermined voltage to the light-emitting element member.
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