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公开(公告)号：US5566142A
公开(公告)日：1996-10-15
申请号：US384843
申请日：1995-02-07
摘要： The present invention is directed to an apparatus using an integrated type pickup as an optical head for writing and reading optical information and capabling of writing data at high speeds. The apparatus includes a laser diode having an active layer at its intermediate position and having one area side held over a surface of a semiconductor substrate with an insulating layer interposed between the semiconductor substrate and the laser diode relative to the active layer. The laser diode has two areas with the active layer as a boundary and a constant potential is applied from a power supply to the insulating layer side of the laser diode and a transistor (laser diode drive unit) is provided to apply a modulation signal to the other area of the laser diode so that the laser diode is driven to modulate its output. By doing so, a constant potential is maintained at the semiconductor substrate and at the insulating layer's side of the laser diode and the modulation signal is applied to the other area side of the laser diode. When a drive current of the laser diode is varied by the modulation signal, a voltage variation occurs only on the other area side of the laser diode so that a high-frequency drive current, if flowing through the insulating layer side, is small and hence the laser diode has its output to be modulated effectively.
摘要翻译： 本发明涉及使用集成型拾取器作为用于写入和读取光学信息的光学头和高速写入数据的功能的装置。 该装置包括激光二极管，该激光二极管在其中间位置处具有有源层，并且其一个区域侧保持在半导体衬底的表面上，相对于有源层，绝缘层介于半导体衬底和激光二极管之间。 激光二极管具有两个区域，其中有源层作为边界，并且从电源向激光二极管的绝缘层侧施加恒定电位，并且提供晶体管（激光二极管驱动单元）以将调制信号施加到 激光二极管的其他区域，以便驱动激光二极管来调制其输出。 通过这样做，在半导体衬底和激光二极管的绝缘层侧保持恒定的电位，并且将调制信号施加到激光二极管的另一个区域侧。 当激光二极管的驱动电流由调制信号变化时，仅在激光二极管的另一区域侧产生电压变化，使得如果流过绝缘层侧的高频驱动电流较小，因此 激光二极管的输出有效调制。
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2.发明授权
公开(公告)号：US5018155A
公开(公告)日：1991-05-21
申请号：US585463
申请日：1990-09-20
申请人： Nobuo Miyairi
发明人： Nobuo Miyairi
IPC分类号： G11B7/125 , H01S5/0683
CPC分类号： G11B7/126 , H01S5/06832
摘要： This semiconductor laser driving apparatus for driving a semiconductor laser and to be used for an optical information recording and reproducing apparatus doing at least one of recording and reproducing information in an information recording medium by using a light from the semiconductor laser comprises an emitted light amount detecting device for detecting the emitted light amount of the semiconductor laser, an output controlling device for controlling the output of the semiconductor laser on the basis of the detected output of the emitted light amount detecting device so as to be kept constant, a driving device for feeding said semiconductor laser with an operating direct current, a high frequency superimposing device for superimposing a high frequency current on the operating direct current from the driving means, a measuring device for measuring the variation of the emitted light amount of the semiconductor laser with the variation of the operating current of the semiconductor laser in the absence of the information recording medium in the focus position of the semiconductor laser and a superimposed amount controlling device for controlling the superimposed amount by the high frequency superimposing device in response to the measured result of the measuring means.
摘要翻译： 用于驱动半导体激光器并用于光信息记录和再现装置的半导体激光器驱动装置，其通过使用来自半导体激光器的光进行信息记录介质中的记录和再现信息中的至少一个，包括发射光量检测 用于检测半导体激光器的发射光量的装置，输出控制装置，用于根据发射光量检测装置的检测输出控制半导体激光器的输出以保持恒定;输出驱动装置，用于进给 所述具有工作直流电的半导体激光器，用于将来自驱动装置的工作直流上的高频电流叠加的高频叠加装置，用于测量半导体激光器的发射光量的变化的测量装置， 半导体激光器的工作电流 在不存在半导体激光器的聚焦位置处的信息记录介质的情况下，以及用于响应于测量装置的测量结果，由高频叠加装置控制叠加量的叠加量控制装置。
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公开(公告)号：US06744573B2
公开(公告)日：2004-06-01
申请号：US10217676
申请日：2002-08-12
IPC分类号： G02B702
CPC分类号： G02B7/1805
摘要： Element fixing mounting portions are formed in the shape of bridge beams on both the side surfaces or the like of the first optical surface, which is disposed in confrontation with an image display element, of a Free-Form-Surface prism 61 acting as an optical element, the side surfaces being located externally of the effective light beam range of the first optical surface. Then, the optical element can be mounted on a cabinet making effective use of a space by projecting positioning bosses or the like from the mounting portions, the bosses being used when optical element is mounted on the cabinet.
摘要翻译： 元件固定安装部分形成为与作为光学的自由曲面棱镜61对准的第一光学表面的两个侧表面等上的桥梁的形状 所述侧表面位于所述第一光学表面的有效光束范围的外部。 然后，通过从安装部分突出定位凸台等可以将光学元件安装在有效利用空间的机柜上，当光学元件安装在机柜上时，使用凸台。
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公开(公告)号：US07474276B2
公开(公告)日：2009-01-06
申请号：US09911673
申请日：2001-07-24
IPC分类号： G09G5/00
CPC分类号： G09G5/006 , G09G2330/021 , G09G2370/04 , H04N5/63 , H04N5/7491
摘要： A display system includes a host apparatus having a video interface circuit and a display apparatus operated by feed of a video image and power from the host apparatus, and also has a communication function for receiving and transmitting data between the host apparatus and the display apparatus. In the display system, the display apparatus transmits power consumption data thereof stored in an EEPROM to the host apparatus and processes the power consumption data thereof which is received by the host apparatus, thus controlling power of the display system including the host apparatus and the display apparatus.
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公开(公告)号：US5495464A
公开(公告)日：1996-02-27
申请号：US296753
申请日：1994-08-26
CPC分类号： G11B7/126
摘要： In an optical data recording/reproducing apparatus for performing write and read operations of data by irradiating laser light onto an optical data recording medium, in order to reduce noise of a semiconductor laser, an HF oscillator is provided to superpose an HF current on a drive current to be applied to the semiconductor laser. The HF oscillator is housed in a conductive shield case together with the semiconductor laser. An LC low-pass filter is also provided in a signal line connecting the components inside and outside the shield case to prevent undesired radiation of the HF current. A write drive line and a read drive line of the semiconductor laser are separated in the shield case, and the write drive line is disconnected from the HF oscillator in at least a read mode.
摘要翻译： 在用于通过将激光照射到光学数据记录介质上进行数据的写入和读取操作的光学数据记录/再现装置中，为了降低半导体激光器的噪声，提供HF振荡器以将HF电流叠加在驱动器 要施加到半导体激光器的电流。 HF振荡器与半导体激光器一起容纳在导电屏蔽壳体中。 在连接屏蔽壳体内部和外部的部件的信号线中还提供LC低通滤波器，以防止HF电流的不期望的辐射。 半导体激光器的写入驱动线和读取驱动线在屏蔽壳中分离，写入驱动线至少在读取模式下与HF振荡器断开。
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