专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06728178B2 Semiconductor laser control method and semiconductor laser control device 有权
标题翻译：半导体激光控制方法和半导体激光控制装置
公开(公告)号：US06728178B2
公开(公告)日：2004-04-27
申请号：US09983402
申请日：2001-10-24
申请人： Kenji Koishi , Yoshiyuki Miyabata , Makoto Usui , Kohjyu Konno , Yasuhiro Ueki , Tomonori Ueno , Yutaka Osada , Toru Fujimoto
发明人： Kenji Koishi , Yoshiyuki Miyabata , Makoto Usui , Kohjyu Konno , Yasuhiro Ueki , Tomonori Ueno , Yutaka Osada , Toru Fujimoto
IPC分类号： H01S310
CPC分类号： G11B7/1263 , G11B7/1267
摘要： Playback signal amplitude drops and continuity of the signal track amplitude is lost at the beginning the data recording area when data is incrementally written to optical discs such as DVD-R or DVD-RW media. Feed-forward control quickly settles semiconductor laser recording power to the target power level immediately after an incremental recording starts. While recording continues, feedback control maintains laser power at a desired recording power level even when the required current supply varies due to the temperature characteristics of the semiconductor laser when recording lasts for an extended period of time. A semiconductor laser control method and semiconductor laser control device thereby maintain laser power at a stable target recording power level quickly and for as long as recording continues.
摘要翻译：当数据被递增地写入诸如DVD-R或DVD-RW光盘的光盘时，数据记录区开始时，回放信号幅度下降和信号轨迹幅度的连续性丢失。增量记录开始后，前馈控制可以快速将半导体激光记录功率稳定在目标功率水平。在继续记录的同时，即使当所需的电流源由于半导体激光器的温度特性在长时间持续时的温度特性而变化时，反馈控制将激光功率维持在期望的记录功率水平。半导体激光器控制方法和半导体激光器控制装置能够使激光功率保持在稳定的目标记录功率水平，并且只要持续进行记录。

2. 发明授权

US06657935B2 Method and apparatus for recording information on recording medium 有权
公开(公告)号：US06657935B2
公开(公告)日：2003-12-02
申请号：US09944120
申请日：2001-09-04
申请人： Hideharu Eguchi , Yasuhiro Ueki , Osamu Yanagisawa , Yutaka Osada , Kenji Koishi , Makoto Usui , Kohjyu Konno , Yuuichi Kamioka
发明人： Hideharu Eguchi , Yasuhiro Ueki , Osamu Yanagisawa , Yutaka Osada , Kenji Koishi , Makoto Usui , Kohjyu Konno , Yuuichi Kamioka
IPC分类号： G11B700
CPC分类号： G11B7/126
摘要： Multi-pulse trains of a forward laser beam are applied to an optical disc to record mark areas thereon. The multi-pulse trains correspond to the mark areas respectively. The multi-pulse trains represent information to be recorded. Detection is made as to an intensity of a reflected laser beam which results from reflection of the forward laser beam by the optical disc. The detected intensity is divided by a setting intensity to get a division result. A condition of recording of each of the mark areas is detected in response to the division result. An amplitude of each of the multi-pulse trains is controlled in response to the detected condition.

3. 发明授权

US06912190B2 Optical disc apparatus and method for reading information from an optical disk having tracks and spaces between the tracks on which address information is recorded 有权
标题翻译：光盘装置和方法，用于从具有记录有地址信息的轨道之间的轨道和间隔的光盘读取信息
公开(公告)号：US06912190B2
公开(公告)日：2005-06-28
申请号：US09987384
申请日：2001-11-14
申请人： Chikashi Inokuchi , Kenji Koishi , Kohjyu Konno , Yutaka Osada , Mitsuhiko Oohta , Takashi Kawai
发明人： Chikashi Inokuchi , Kenji Koishi , Kohjyu Konno , Yutaka Osada , Mitsuhiko Oohta , Takashi Kawai
IPC分类号： G11B7/005 , G11B7/007 , G11B7/13 , G11B20/10 , G11B27/19 , G11B27/24 , G11B7/00
CPC分类号： G11B27/24 , G11B7/005 , G11B7/007 , G11B7/00745 , G11B7/131 , G11B20/10009 , G11B2220/216 , G11B2220/218 , G11B2220/2562
摘要： An optical disc apparatus reads the address information from an optical disc which has tracks and track spaces formed between tracks. The apparatus has an optical head which irradiates the disc with light and includes tracking detectors, divided into a first detector and a second detector in a track direction, detecting the light reflected from the disc and outputting detection signals, an adjusting circuit which adjusts amplitudes of the first and second detection signals and outputs the signals at a position where the address information is recorded, a differential amplifying circuit which outputs the differential signal which is the difference between the adjusted first and second detection signals, and an address detecting circuit which detects the address information based on the differential signal. As a result, the optical disc apparatus accurately detects whether information is being recorded on a correct track and improves the reliability during recording.
摘要翻译：光盘装置从具有在轨道之间形成的轨道和轨道空间的光盘读取地址信息。该装置具有用光照射光盘的光头，并且包括在轨道方向上被分成第一检测器和第二检测器的跟踪检测器，检测从盘反射的光并输出检测信号;调整电路，第一和第二检测信号并输出在地址信息被记录的位置处的信号，输出作为调整后的第一和第二检测信号之间的差的差分信号的差分放大电路和检测基于差分信号的地址信息。结果，光盘装置准确地检测信息是否正在记录在正确的轨道上并且提高了记录期间的可靠性。

4. 发明授权

US06456573B1 Information recording and reproducing apparatus 有权
公开(公告)号：US06456573B1
公开(公告)日：2002-09-24
申请号：US09954024
申请日：2001-09-18
申请人： Yasuhiro Ueki , Yutaka Osada , Osamu Yanagisawa , Chikashi Inokuchi , Yuuichi Kamioka , Kohjyu Konno
发明人： Yasuhiro Ueki , Yutaka Osada , Osamu Yanagisawa , Chikashi Inokuchi , Yuuichi Kamioka , Kohjyu Konno
IPC分类号： G11B509
CPC分类号： G11B27/24 , G11B7/0053 , G11B7/00718 , G11B7/24082 , G11B20/1403 , G11B27/3027 , G11B2220/216 , G11B2220/218 , G11B2220/2562
摘要： An apparatus operates for recording and reproducing information on and from a recording medium formed with a track and pre-pits. The track has a wobble. The pre-pits are in a predetermined phase relation with the wobble of the track. The apparatus includes a pickup for reproducing a signal from the recording medium. A limiter operates for limiting an amplitude of the signal reproduced by the pickup in response to a limiting level, and thereby processing the signal reproduced by the pickup into a limiting-resultant signal. A filter operates for suppressing components of the limiting-resultant signal, and thereby processing the limiting-resultant signal into a filtering-resultant signal. The components have specified frequencies, and are caused by the pre-pits. The limiting level for the limiter is generated in response to the filtering-resultant signal. A signal caused by the wobble of the groove is extracted from the filtering-resultant signal.

5. 发明授权

US06490302B1 Semiconductor laser control circuit and laser light source 失效
标题翻译：半导体激光控制电路和激光光源
公开(公告)号：US06490302B1
公开(公告)日：2002-12-03
申请号：US09698975
申请日：2000-10-27
申请人： Kenji Koishi , Kohjyu Konno
发明人： Kenji Koishi , Kohjyu Konno
IPC分类号： H01S300
CPC分类号： H01S5/06832 , G11B7/1263 , H01S5/4025
摘要： A semiconductor laser control circuit of the invention can modulate a light power level among a plurality of set levels including a first level, a second level lower than the first level, and a third level lower than the first level but higher than the second level. The semiconductor laser control circuit includes: a circuit portion for generating a first signal based on a light power level actually detected by a light detector in a first period in which a light power level of laser radiation is to be modulated among the first level, the second level, and the third level; a circuit portion for generating a second signal based on a light power level actually detected by the light detector in a second period in which a light power level of the laser radiation is to be modulated between the first level and the second level; a circuit portion for generating a third signal based on a light power level actually detected by the light detector in a third period in which the light power level of the laser radiation is to be at the third level; and a signal processor for determining a light power level of the first level and a light power level of the second level by operation, based on the first to third signals. The light power level is adjusted based on an output of the signal processor.
摘要翻译：本发明的半导体激光器控制电路可以在包括第一电平，低于第一电平的第二电平和低于第一电平但高于第二电平的第三电平的多个设定电平之间调制光功率电平。半导体激光器控制电路包括：电路部分，用于在第一阶段中基于由光检测器实际检测的光功率电平产生第一信号，在第一周期中，要在第一电平之间调制激光辐射的光功率电平，第二级和第三级; 电路部分，用于在第一时间段内基于由光检测器实际检测的光功率电平产生第二信号，在第二周期中将要在第一电平和第二电平之间调制激光辐射的光功率电平; 电路部分，用于在激光辐射的光功率级别处于第三级的第三周期中，基于由光检测器实际检测到的光功率电平产生第三信号; 以及信号处理器，用于基于第一至第三信号，通过操作来确定第一电平的光功率电平和第二电平的光功率电平。光功率电平根据信号处理器的输出进行调整。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式