Optical Scanning Apparatus Voltage Holding Unit APC Stabilization

The patent applies preliminary action by pre-charging a capacitor with a voltage corresponding to the target light power before the laser light source is activated. When the laser is turned on, the capacitor immediately provides the appropriate driving current, eliminating the need for gradual stepwise current increase. This preliminary preparation of the driving circuit enables the laser to reach target power instantly while maintaining protection through controlled voltage application.

The system performs preliminary action by calculating and storing the appropriate driving current value corresponding to target light power in advance (before laser activation). The capacitor is charged to the voltage level that will produce the exact current needed. When image formation begins, the pre-calculated voltage is immediately applied, allowing instant reach to target power without gradual adjustment, thus enabling immediate image formation while maintaining laser safety through precise current control.

In multi-beam systems, the patent applies preliminary action by pre-charging capacitors for all laser light sources simultaneously before activation. Each capacitor is charged to its specific voltage corresponding to the target light power of its associated laser. When all lasers are turned on, they all receive their respective driving currents immediately from their pre-charged capacitors, allowing all beams to reach target power simultaneously rather than sequentially, thus maintaining enhanced scanning coverage while dramatically reducing total initialization time.