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Semiconductor laser driving device, semiconductor laser driving method, and image forming apparatus using semiconductor laser driving device
Semiconductor laser driving device, semiconductor laser driving method, and image forming apparatus using semiconductor laser driving device
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机译:半导体激光器驱动装置,半导体激光器驱动方法以及使用该半导体激光器驱动装置的图像形成装置
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摘要
In a semiconductor laser driving device and method, a first current below an oscillation threshold current of a semiconductor laser is outputted to the laser invariably. A second current needed for light emission of the laser responsive to an input signal is outputted to the laser. A third current for controlling the laser such that a detected amount of emission light from the laser accords with a given value is outputted to the laser. A predetermined auxiliary current is outputted to the laser. An initialization operation is performed to detect luminescence characteristics of the laser, and a signal indicating a value of the second current derived from the detected luminescence characteristics is outputted. The third current is controlled so that an amount of light outputted by the laser receiving a sum of the first, second, third and auxiliary currents, accords with a predetermined amount.
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