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1. 发明授权

US07782917B2 Laser driving circuit, optical pickup and recording/reading equipment 有权
标题翻译：激光驱动电路，光学拾音器和录音/阅读设备
公开(公告)号：US07782917B2
公开(公告)日：2010-08-24
申请号：US11755346
申请日：2007-05-30
申请人： Haruhiko Mizuno
发明人： Haruhiko Mizuno
IPC分类号： H01S3/00
CPC分类号： H01S5/042
摘要： Disclosed is a laser driving technique capable of reducing power consumption in a laser driving circuit to achieve reduced heat generation in an optical pickup of a recording/reading equipment for an optical disc. A base-voltage control circuit is connected to a base of a grounded-base cascode transistor connected between a driver circuit and a laser diode (LD), and a LD-anode-voltage control circuit is connected to an anode of the laser diode. The base-voltage control circuit and the LD-anode-voltage control circuit are connected to a controller, and operable to variously change an anode voltage of the laser diode and a base voltage of the cascode transistor depending on a driving current for the laser diode.
摘要翻译：公开了一种激光驱动技术，其能够降低激光驱动电路中的功率消耗，以实现用于光盘的记录/读取设备的光学拾取器中的减少的发热。基极电压控制电路连接到连接在驱动电路和激光二极管（LD）之间的接地基共成型晶体管的基极，LD-阳极电压控制电路连接到激光二极管的阳极。基极电压控制电路和LD-阳极电压控制电路连接到控制器，并且可操作以根据激光二极管的驱动电流来不同地改变激光二极管的阳极电压和共源共栅晶体管的基极电压。

2. 发明申请

US20070253313A1 LASER DRIVER, METHOD FOR DRIVING LASER, AND RECORDING/READING EQUIPMENT 失效
标题翻译：激光驱动器，驱动激光的方法和记录/读取设备
公开(公告)号：US20070253313A1
公开(公告)日：2007-11-01
申请号：US11697068
申请日：2007-04-05
申请人： Haruhiko Mizuno
发明人： Haruhiko Mizuno
IPC分类号： G11B7/00
CPC分类号： G11B7/126
摘要： The laser drive circuit of the present invention includes a first drive circuit 105 receiving an input of a current from a variable current source 103 and a first pulse control signal 101 and outputting a first drive current in synchronism with the first pulse control signal 101; a pulse output circuit 107 outputting a pulse signal in response to a falling edge of the first pulse control signal 101; and a second drive circuit 106 receiving an input of a current from a variable current source 104 and a second pulse control signal 102, generating a second drive current in synchronism with the second pulse control signal 102, and outputting a decreased current value of the second drive current at least in synchronism with the pulse signal. According to this configuration, the falling time of the pulse can be shortened regardless of the relationship between the voltage of a laser connecting terminal and the power source voltage of a drive circuit or a ground voltage.
摘要翻译：本发明的激光驱动电路包括：第一驱动电路105，接收来自可变电流源103的电流的输入;以及第一脉冲控制信号101，并与第一脉冲控制信号101同步地输出第一驱动电流; 脉冲输出电路107响应于第一脉冲控制信号101的下降沿而输出脉冲信号; 以及第二驱动电路106，其从可变电流源104和第二脉冲控制信号102接收电流的输入，产生与第二脉冲控制信号102同步的第二驱动电流，并输出第二驱动电路106的减小的电流值至少与脉冲信号同步地驱动电流。根据该结构，与激光连接端子的电压和驱动电路的电源电压或接地电压之间的关系无关，可以缩短脉冲的下降时间。

3. 发明授权

US07760779B2 Laser driver, method for driving laser, and recording/reading equipment 失效
标题翻译：激光驱动器，驱动激光的方法和记录/读取设备
公开(公告)号：US07760779B2
公开(公告)日：2010-07-20
申请号：US11697068
申请日：2007-04-05
申请人： Haruhiko Mizuno
发明人： Haruhiko Mizuno
IPC分类号： H01S3/00 , H01S3/13
CPC分类号： G11B7/126
摘要： The laser drive circuit of the present invention includes a first drive circuit 105 receiving an input of a current from a variable current source 103 and a first pulse control signal 101 and outputting a first drive current in synchronism with the first pulse control signal 101; a pulse output circuit 107 outputting a pulse signal in response to a falling edge of the first pulse control signal 101; and a second drive circuit 106 receiving an input of a current from a variable current source 104 and a second pulse control signal 102, generating a second drive current in synchronism with the second pulse control signal 102, and outputting a decreased current value of the second drive current at least in synchronism with the pulse signal. According to this configuration, the falling time of the pulse can be shortened regardless of the relationship between the voltage of a laser connecting terminal and the power source voltage of a drive circuit or a ground voltage.
摘要翻译：本发明的激光驱动电路包括：第一驱动电路105，接收来自可变电流源103的电流的输入;以及第一脉冲控制信号101，并与第一脉冲控制信号101同步地输出第一驱动电流; 脉冲输出电路107响应于第一脉冲控制信号101的下降沿而输出脉冲信号; 以及第二驱动电路106，其从可变电流源104和第二脉冲控制信号102接收电流的输入，产生与第二脉冲控制信号102同步的第二驱动电流，并输出第二驱动电路106的减小的电流值至少与脉冲信号同步地驱动电流。根据该结构，与激光连接端子的电压和驱动电路的电源电压或接地电压之间的关系无关，可以缩短脉冲的下降时间。

4. 发明申请

US20090074018A1 LASER DRIVING DEVICE 审中-公开
标题翻译：激光驱动装置
公开(公告)号：US20090074018A1
公开(公告)日：2009-03-19
申请号：US12235824
申请日：2008-09-23
申请人： Hisashi Senga , Hiromichi Ishibashi , Kenzo Ishibashi , Haruhiko Mizuno
发明人： Hisashi Senga , Hiromichi Ishibashi , Kenzo Ishibashi , Haruhiko Mizuno
IPC分类号： H01S3/10 , H01S3/00
CPC分类号： G11B7/126 , G11B7/00456 , G11B7/0062 , H01S5/0428
摘要： A laser driving device is provided that can support a higher speed and drives a semiconductor laser (3) to emit light in a pulse-like manner in accordance with a digital signal. The laser driving device includes a temperature sensor (5), a recording pulse generator (1), an auxiliary pulse generator (4), and an adder (8). The temperature sensor (5) produces a measured temperature that changes in accordance with a temperature of the semiconductor laser. The recording pulse generator (1), the auxiliary pulse generator (4), and the adder (8) produce a pulse-like signal having a shape corresponding to the measured temperature.
摘要翻译：提供了可以支持更高速度并且驱动半导体激光器（3）以根据数字信号的脉冲状发射光的激光驱动装置。激光驱动装置包括温度传感器（5），记录脉冲发生器（1），辅助脉冲发生器（4）和加法器（8）。温度传感器（5）产生根据半导体激光器的温度而变化的测量温度。记录脉冲发生器（1），辅助脉冲发生器（4）和加法器（8）产生具有对应于测量温度的形状的脉冲状信号。

5. 发明申请

US20070280315A1 LASER DRIVING CIRCUIT, OPTICAL PICKUP AND RECORDING/READING EQUIPMENT 有权
标题翻译：激光驱动电路，光学拾取和记录/读取设备
公开(公告)号：US20070280315A1
公开(公告)日：2007-12-06
申请号：US11755346
申请日：2007-05-30
申请人： Haruhiko MIZUNO
发明人： Haruhiko MIZUNO
IPC分类号： H01S3/13 , H01S3/00
CPC分类号： H01S5/042
摘要： Disclosed is a laser driving technique capable of reducing power consumption in a laser driving circuit to achieve reduced heat generation in an optical pickup of a recording/reading equipment for an optical disc. A base-voltage control circuit is connected to a base of a grounded-base cascode transistor connected between a driver circuit and a laser diode (LD), and a LD-anode-voltage control circuit is connected to an anode of the laser diode. The base-voltage control circuit and the LD-anode-voltage control circuit are connected to a controller, and operable to variously change an anode voltage of the laser diode and a base voltage of the cascode transistor depending on a driving current for the laser diode.
摘要翻译：公开了一种激光驱动技术，其能够降低激光驱动电路中的功率消耗，以实现用于光盘的记录/读取设备的光学拾取器中的减少的发热。基极电压控制电路连接到连接在驱动电路和激光二极管（LD）之间的接地基共成型晶体管的基极，LD-阳极电压控制电路连接到激光二极管的阳极。基极电压控制电路和LD-阳极电压控制电路连接到控制器，并且可操作以根据激光二极管的驱动电流来不同地改变激光二极管的阳极电压和共源共栅晶体管的基极电压。

6. 发明申请

US20050069002A1 Laser driving device 审中-公开
标题翻译：激光驱动装置
公开(公告)号：US20050069002A1
公开(公告)日：2005-03-31
申请号：US10938536
申请日：2004-09-13
申请人： Hisashi Senga , Hiromichi Ishibashi , Kenzo Ishibashi , Haruhiko Mizuno
发明人： Hisashi Senga , Hiromichi Ishibashi , Kenzo Ishibashi , Haruhiko Mizuno
IPC分类号： G11B7/004 , G11B7/0045 , G11B7/006 , G11B7/125 , H01S3/00 , H01S5/042
CPC分类号： G11B7/126 , G11B7/00456 , G11B7/0062 , H01S5/0428
摘要： A laser driving device is provided that can support a higher speed and drives a semiconductor laser (3) to emit light in a pulse-like manner in accordance with a digital signal. The laser driving device includes a temperature sensor (5), a recording pulse generator (1), an auxiliary pulse generator (4), and an adder (8). The temperature sensor (5) produces a measured temperature that changes in accordance with a temperature of the semiconductor laser. The recording pulse generator (1), the auxiliary pulse generator (4), and the adder (8) produce a pulse-like signal having a shape corresponding to the measured temperature.
摘要翻译：提供了可以支持更高速度并且驱动半导体激光器（3）以根据数字信号的脉冲状发射光的激光驱动装置。激光驱动装置包括温度传感器（5），记录脉冲发生器（1），辅助脉冲发生器（4）和加法器（8）。温度传感器（5）产生根据半导体激光器的温度而变化的测量温度。记录脉冲发生器（1），辅助脉冲发生器（4）和加法器（8）产生具有对应于测量温度的形状的脉冲状信号。

7. 发明授权

US07046706B2 Laser diode driving device 有权
标题翻译：激光二极管驱动装置
公开(公告)号：US07046706B2
公开(公告)日：2006-05-16
申请号：US10719435
申请日：2003-11-21
申请人： Kenichi Tatehara , Haruhiko Mizuno , Norihide Kinugasa
发明人： Kenichi Tatehara , Haruhiko Mizuno , Norihide Kinugasa
IPC分类号： H01S3/00 , H01S3/30
CPC分类号： G11B7/126 , H01S5/042 , H01S5/0428
摘要： A laser diode driving device of the present invention can appropriately shorten the rising time and the falling time of a laser diode drive current in a range from a small current region to a large current region. In synchronization with the addition of an original input current from an input constant current source to the laser diode drive current amplifier, a differentiated current is added to the input current through a differentiation circuit and a pull-in type V-I conversion circuit, whereby the rising of a laser diode drive current is made abrupt. Furthermore, by increasing a gate potential of an input PchMOS transistor constituting the laser diode drive current amplifier by a differentiation circuit and a push-out type V-I conversion circuit in synchronization with the disconnection of an input current, the falling of a laser diode drive current is made abrupt.
摘要翻译：本发明的激光二极管驱动装置可以在从小电流区域到大电流区域的范围内适当地缩短激光二极管驱动电流的上升时间和下降时间。与从输入恒流源向激光二极管驱动电流放大器添加原始输入电流同步，微分电流通过微分电路和引入型VI转换电路加到输入电流上，由此上升的激光二极管驱动电流突然。此外，通过与输入电流的断开同步地通过微分电路和推出型VI转换电路来增加构成激光二极管驱动电流放大器的输入PchMOS晶体管的栅极电位，激光二极管驱动电流的下降突然出现

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