发明名称 |
SEMICONDUCTOR LASER DRIVING DEVICE, SEMICONDUCTOR LASER DRIVING METHOD, AND IMAGE FORMING APPARATUS USING SEMICONDUCTOR LASER DRIVING DEVICE |
摘要 |
<p>ABSTRACT 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.</p> |
申请公布号 |
WO2004040721(A1) |
申请公布日期 |
2004.05.13 |
申请号 |
WO2003JP13843 |
申请日期 |
2003.10.29 |
申请人 |
RICOH COMPANY, LTD.;KYOUGOKU, HIROAKI;IKEDA, JUNICHI |
发明人 |
KYOUGOKU, HIROAKI;IKEDA, JUNICHI |
分类号 |
H01S5/042;H01S5/0683;(IPC1-7):H01S5/042;H01S5/630;B41J2/44;H04B10/04 |
主分类号 |
H01S5/042 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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