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    • 5. 发明授权
    • Emission control apparatus with settable target intensity and image forming apparatus using same
    • 具有可设定目标强度的排放控制装置和使用其的图像形成装置
    • US06989520B2
    • 2006-01-24
    • US10411301
    • 2003-04-11
    • Masataka MochidukiYasuhiro Tomioka
    • Masataka MochidukiYasuhiro Tomioka
    • G01D9/42H01S3/10
    • H01S5/0683H01S5/042
    • There is provided an emission control apparatus with which it is capable of variably controlling the intensity of a light beam to be set, in a stable manner and at a low cost without increasing the circuit size. A semiconductor laser diode LD emits a light beam. A photo diode PD detects the intensity of the light beam emitted from the semiconductor laser diode LD. A driving circuit supplies driving current to the semiconductor laser diode LD. A switching section switches the driving current according to a video signal. An input terminal receives a pulse width modulation signal. A smoothing circuit smoothes the received pulse width modulation signal. A laser driver controls a value of the driving current according to smoothed voltage obtained by the smoothing circuit such that the detected intensity of the light beam is equal to a target intensity.
    • 提供了一种发射控制装置,其能够以稳定的方式和低成本可变地控制要设置的光束的强度,而不增加电路尺寸。 半导体激光二极管LD发射光束。 光电二极管PD检测从半导体激光二极管LD发射的光束的强度。 驱动电路向半导体激光二极管LD提供驱动电流。 切换部分根据视频信号切换驱动电流。 输入端接收脉宽调制信号。 平滑电路平滑所接收的脉宽调制信号。 激光驱动器根据由平滑电路获得的平滑电压来控制驱动电流的值,使得检测到的光束强度等于目标强度。