| 摘要 |
A driving device which supplies a current to a plurality of current?driven optical elements (Ep) to drive the optical elements includes at least a driving current supply circuit (133) which supplies a driving current to each optical element for a predetermined period, and a control voltage applying circuit (132) which applies a charge voltage having a voltage value corresponding to a voltage to be applied to each optical element using the driving current, before the driving current is supplied. The driving current supply circuit (133) includes a single constant current generating circuit (10A, 10B, 10C) which outputs a constant current having the same current value as that of a driving current, and a plurality of current storage circuits (30A, 30B, 30C) which sequentially receive and hold the constant current and output the driving current on the basis of the constant current. |
