Xi'an Institute of Optics and Precision Mechanics,CAS
Driving method for semiconductor laser of laser printer | |
其他题名 | Driving method for semiconductor laser of laser printer |
HAMAGUCHI IWAO; SHIBATA ISAMU | |
1983-06-25 | |
专利权人 | RICOH KK |
公开日期 | 1983-06-25 |
授权国家 | 日本 |
专利类型 | 发明申请 |
摘要 | PURPOSE:To reproduce the half-tone with high precision, by comparing the output signal from a photodetector with a gamma-corrected information signal in a differential amplifier and controlling the driving current of a semiconductor laser by the difference signal. CONSTITUTION:A partial optical output L2 outputted from a semiconductor laser 2 is detected by a photodetector 11, and the detected output is amplified in an operational amplifier OP2 and is applied to one input of a differential amplifier OP3. An input voltage Vi of the information signal to a laser printer is inputted to a gamma correcting circuit 10 and is gamma-corrected by operational amplifiers OP4 and OP5, a ladder-type circuit, etc., and the gamma-corrected information signal is applied to the other input of the amplfier OP3. The output signal from the detector 11 is compared with the gamma-corrected information signal in the amplifier OP3, and a driving circuit 12 of the laser is controlled by the difference signal to control the driving current flowed to the semiconductor laser 2, and thus, the half-tone is reproduced with a high precision. |
其他摘要 | 目的:通过将光电探测器的输出信号与差分放大器中的伽马校正信息信号进行比较,并通过差分信号控制半导体激光器的驱动电流,以高精度再现半色调。组成:由光电探测器11检测从半导体激光器2输出的部分光输出L2,并且检测的输出在运算放大器OP2中被放大,并被施加到差分放大器OP3的一个输入。到激光打印机的信息信号的输入电压Vi被输入到伽马校正电路10,并由运算放大器OP4和OP5,梯形电路等进行伽马校正,并且应用伽马校正的信息信号。到amplfier OP3的另一个输入端。来自检测器11的输出信号与放大器OP3中的伽马校正信息信号进行比较,并且激光器的驱动电路12由差信号控制,以控制流到半导体激光器2的驱动电流,因此,半色调以高精度再现。 |
主权项 | - |
申请日期 | 1981-12-19 |
专利号 | JP1983106953A |
专利状态 | 失效 |
申请号 | JP1981205582 |
公开(公告)号 | JP1983106953A |
IPC 分类号 | B41J2/44 | G06K15/12 | H01S5/06 | H04N1/23 | H04N1/40 | B41J3/00 | H01S3/096 |
专利代理人 | - |
代理机构 | - |
文献类型 | 专利 |
条目标识符 | http://ir.opt.ac.cn/handle/181661/59288 |
专题 | 半导体激光器专利数据库 |
作者单位 | RICOH KK |
推荐引用方式 GB/T 7714 | HAMAGUCHI IWAO,SHIBATA ISAMU. Driving method for semiconductor laser of laser printer. JP1983106953A[P]. 1983-06-25. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
JP1983106953A.PDF(170KB) | 专利 | 开放获取 | CC BY-NC-SA | 请求全文 |
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