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1. 发明专利

JPH1074355A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH1074355A
公开(公告)日：1998-03-17
申请号：JP4522597
申请日：1997-02-28
申请人： HITACHI LTD
发明人： INOUE SHIGEKI , MINODA HIROSHI , TANAKA HIROYUKI , ONO KAZUHIKO , FUKUSHIMA AKIO
IPC分类号： G11B19/12 , G11B7/00 , G11B7/004 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To automatically discriminate disks prior to a reproducing or a recording and a reproducing, to switch to optical and circuit systems corresponding to the discriminated disk and to conduct a reproducing or a recording and a reproducing by providing the optical and circuit systems corresponding to the optical disk having a different height of a recording surface. SOLUTION: The circuit system is provided with a disk discriminating circuit 14 which discriminates CDs and DVDs having different recording surface heights. Prior to the reproducing or the recording of a loaded disk CD 1 or a DVD 4, the disk is discriminated and a switching is automatically made to a proper optical system 6 and the circuit system. Thus, a reproducing or a recording of a target disk is conducted without making a special operation by a user who does not worry about the kind of the disk.

2. 发明专利

JPS5940355A Drop-out compensating circuit of disk reproducer 失效
标题翻译：磁盘复制器的降压补偿电路
公开(公告)号：JPS5940355A
公开(公告)日：1984-03-06
申请号：JP14931282
申请日：1982-08-30
申请人： Hitachi Ltd
发明人： ISO YOSHIMI , NAKAGAKI HARUSHIGE , INOUE SHIGEKI , NAKAMURA MASAFUMI
IPC分类号： G11B21/10 , G11B7/09 , G11B21/08
CPC分类号： G11B7/0948 , G11B21/085
摘要： PURPOSE:To prevent a track jump although it is impossible to detect a track error signal owing to the flaws, dust, etc. on a disk, by switching a pickup driving device after reading out the memory contents obtained before by one turn through a flaw detecting circuit. CONSTITUTION:The flawed area of a disk is reproduced at an instant when the contents of an address 100 are written. If the output of a flaw detector is set at a high level, a memory write switch 14 is opened and a memory read switch 15 closed. Thus the reading starts at and after an address 101. The information on a track error signal obtained before by one turn is stored in and after the address 101, and therefore it is possible to apply the track servo with the flawless information obtained before by one turn and via a D/A converter 21 and a changeover switch 12. In such a way, it is possible to drive a pickup driving device after reading out an error signal at the disk position same as that set before by one turn even in case the disk has flaws and a track error signal drops out. As a result, a track jump can be avoided.
摘要翻译：目的：为了防止轨道跳跃，尽管由于磁盘上的缺陷，灰尘等而不可能检测到轨道误差信号，通过在通过缺陷读出一圈之后获得的存储器内容之后切换拾取驱动装置，检测电路。构成：在写入地址100的内容的瞬间，再现磁盘的有缺陷的区域。如果探伤仪的输出设定为高电平，则存储写入开关14断开，存储器读取开关15闭合。因此，读取开始于地址101之后和之后。在地址101之前和之后存储关于在一匝之前获得的轨道误差信号的信息，因此可以使用前面获得的完美无缺的信息转动并通过D / A转换器21和切换开关12.以这种方式，可以在读出与之前设置的盘位置相同的盘位置之后驱动拾取驱动装置，即使在情况下磁盘有缺陷，并且磁道错误信号丢失。结果，可以避免轨迹跳跃。

3. 发明专利

JPS59714A Power supply 失效
标题翻译：电源
公开(公告)号：JPS59714A
公开(公告)日：1984-01-05
申请号：JP10977882
申请日：1982-06-28
申请人： Hitachi Ltd
发明人： NAKAGAKI HARUSHIGE , AMADA NOBUTAKA , INOUE SHIGEKI
IPC分类号： G05F1/10 , G05F1/46
CPC分类号： G05F1/468
摘要： PURPOSE:To prevent the rush current at the application of power supply, by increasing gradually a slope of a sawtooth wave according to the time constant for increasing the pulse width of an output of a comparator resulting in increasing gradually the conduction angle of a thyristor from zero. CONSTITUTION:The slope of the sawtooth wave generated at a sawtooth wave generating circuit 16 is increased gradually according to the time constant of the time constant circuit 19 and the wave is inputted to a non-inverting terminal of a voltage comparator 15. An output of an error amplifier 14 amplifying a difference between a voltage dividing an output voltage and a reference voltage 13 is inputted to an inverting terminal of the voltage comparator 15. The width of the output pulse of the voltage comparator 15 is increased as the slope of the sawtooth wave is increased, and the conduction angle of the thyristor is increased gradually from zero just after the power supply application to be stable to a constant value. Thus, the DC voltage at the output is increased gradually from zero, allowing to prevent the rush current to a capacitor 7 for protecting the circuit.
摘要翻译：目的：为了防止在施加电源时的冲击电流，通过逐渐增加锯齿波的斜率根据时间常数增加比较器输出的脉冲宽度，从而逐渐增加晶闸管的导通角零。构成：锯齿波发生电路16产生的锯齿波的斜率根据时间常数电路19的时间常数逐渐增加，波被输入到电压比较器15的非反相端。输出放大分压输出电压的电压与参考电压13之差的误差放大器14被输入到电压比较器15的反相端。电压比较器15的输出脉冲宽度随锯齿的斜率而增加波形增加，晶闸管的导通角逐渐从电源施加后的零点逐渐增加到稳定值。因此，输出端的直流电压从零开始逐渐增加，从而可以防止冲击电流流向电容器7以保护电路。

4. 发明专利

JPS58220252A Detecting circuit of tracking error signal of optical pickup 失效
标题翻译：检测光线跟踪误差信号的电路
公开(公告)号：JPS58220252A
公开(公告)日：1983-12-21
申请号：JP10202582
申请日：1982-06-16
申请人： Hitachi Ltd
发明人： NAKAMURA MASAFUMI , INOUE SHIGEKI
IPC分类号： G11B7/09
CPC分类号： G11B7/0948 , G11B7/0903
摘要： PURPOSE: To eliminate a high band component and to reduce the noise generated from an actuator, by eliminating the PCM signal leaked into a tracking error signal without changing the characteristic of a tracking servo loop.
CONSTITUTION: A delaying device 9 is connected to the output of a detector 4-1 to delay the output of the detector by a time equivalent to the delay time τ between light spots 1 and 2. Both spot 2 and an optical detector 4-2 have the same PCM signal while the outputs of the preceding spot 1 and the optical detector 4-1 are delayed by the time τ. Therefore the PCM signal component is equal among input signals of a differential amplifier 6, and the output of the amplifier 6 contains no PCM signal component. As a result, no PCM signal component is contained in the input signal of a tracking servo actuator 8. Thus no noise is generated from the actuator 8.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：为了消除高频带分量并降低致动器产生的噪声，通过消除PCM信号泄漏到跟踪误差信号中，而不改变跟踪伺服环路的特性。构成：延迟装置9连接到检测器4-1的输出，以将检测器的输出延迟等于光点1和2之间的延迟时间τ的时间。斑点2和光学检测器4-2 具有相同的PCM信号，而前一个点1和光学检测器4-1的输出被延迟时间τ。因此，PCM信号分量在差分放大器6的输入信号中相等，放大器6的输出不包含PCM信号分量。结果，在跟踪伺服致动器8的输入信号中不包含PCM信号分量。因此，从致动器8不产生噪声。

5. 发明专利

JPS58212659A Reproducing device of recording information 失效
标题翻译：重现记录信息的设备
公开(公告)号：JPS58212659A
公开(公告)日：1983-12-10
申请号：JP9481382
申请日：1982-06-04
申请人： Hitachi Ltd
发明人： ISO YOSHIMI , TAKEUCHI TAKASHI , INOUE SHIGEKI
IPC分类号： G11B21/08 , G11B27/10
CPC分类号： G11B21/085
摘要： PURPOSE:To select a required reproducing position for a short time while checking an information reproducing signal, by sending a signal at a high speed for a specific time, and changing only reading positions without reproducing a signal during the period of said specific time, and then repeating signal reproducing for a fixed period. CONSTITUTION:When a quick traverse key 16 is depressed, the moving time of a pcikup 2 is set up in a microcomputer 12 in accordance with the absolute time from the most internal periphery of a disc which is detected by a disc position detecting circuit 11. A muting circuit 8 is turned on to mute a reproduced sound and pulses are supplied to a pickup moving circuit 15 by the set time width. After moving the pickup 2 for a specific period, a track servo is turned on to release the muting and transfer the mode to the steady reproducing mode for a fixed time. If the key 16 is continuously depressed, said operation is repeated, and when a required reproducing positon is detected, the key 16 is released to obtain the steady reproducing mode.
摘要翻译：目的：通过在特定时间内以高速发送信号，并且在所述特定时间的期间不改变信号，仅改变读取位置，在检查信息再现信号的同时选择所需的再现位置，以及然后重复固定周期的信号再现。构成：当按下快速移动键16时，根据由盘位置检测电路11检测到的盘的最内侧的绝对时间，在微计算机12中建立pcikup 2的移动时间。静音电路8接通以使再现的声音静音，脉冲以设定的时间宽度提供给拾取器移动电路15。在拾取器2移动特定时间后，导通轨道伺服以释放静音并将模式转移到稳定再现模式一段固定的时间。如果键16连续按压，则重复所述操作，并且当检测到所需的再现位置时，释放键16以获得稳定再现模式。

6. 发明专利

JPS58212657A Controlling device of reproducing speed 失效
标题翻译：控制速度的设备
公开(公告)号：JPS58212657A
公开(公告)日：1983-12-10
申请号：JP9480682
申请日：1982-06-04
申请人： Hitachi Ltd
发明人： KIMURA HIROYUKI , ISO YOSHIMI , INOUE SHIGEKI
IPC分类号： H02P29/00 , G11B19/28 , G11B20/18
CPC分类号： G11B19/28
摘要： PURPOSE:To prevent a servo system from being easily switched by a small hurt and to stabilize operation, by switching a muting signal to use it as a gate signal. CONSTITUTION:A signal picked up by a pickup PU3 is decoded as a voice data by a digital processing circuit 30. If a reproduced signal is erased by a hurt on a disc 2, connection to the circuit 30 is switched to a reproducing speed detecting circuit 5 by a switching controlling circuit 7. When the hurt is small and a voice is not muted, the output of an error detecting circuit 33 is kept to the ''Low'' level, the output of an AND gate 31 is not changed and a switching circuit 6 is also kept at the side of a synchronous signal detecting circuit 4. After passing through the hurt part, the synchronous signal detecting circuit 4 detects a synchronous signal again and the output of the switching controlling circuit is turned to the ''Low'' level.
摘要翻译：目的：为了防止伺服系统容易受到小伤害的切换和稳定运行，通过切换静音信号将其用作门信号。构成：由拾取器PU3拾取的信号由数字处理电路30解码为语音数据。如果再现信号被盘2上的伤害擦除，则将与电路30的连接切换到再现速度检测电路当开关控制电路7受到伤害较小并且声音没有静音时，误差检测电路33的输出保持在“低”电平，与门31的输出不变，切换电路6也保持在同步信号检测电路4的侧面。在通过受伤部分之后，同步信号检测电路4再次检测同步信号，并将切换控制电路的输出转到“ 低级。

7. 发明专利

JPS58212627A Detecting device of mirror surface 失效
标题翻译：检测镜面的设备
公开(公告)号：JPS58212627A
公开(公告)日：1983-12-10
申请号：JP9480382
申请日：1982-06-04
申请人： Hitachi Ltd
发明人： ISO YOSHIMI , INOUE SHIGEKI
IPC分类号： G11B7/00 , G11B7/004 , G11B19/12
CPC分类号： G11B19/12
摘要： PURPOSE:To detect a mirror surface without an influence due to the difference of a disc upon the size of a signal by making a comparator detect that the level of a bit surface is higher than a level obtained by dividing the output of the mirror surface level at its voltage. CONSTITUTION:When a motor 2 is rotated and a track servo following the signal track of the disc 1 is not actuated, an output obtained by converting an optical output from an optical type pickup 3 from light to voltage by a photoelectric converter 4 is supplied as a signal (a) at the information recording surface of the disc 1 and as a signal (b) at the mirror surface. The output of the converter 4 is inputted to a level detectors 5, 6 to obtain the maximum and minimum levels of the signal. The level detectors 5, 6 detect the maximum and minimum levels of the input signal respectively. The output of the level detector 5 is inputted to a voltage divider 7 and the voltage-divided output is 0.7 times the output of the detector 5, so that the output of the detector 6 is higher than the output of the voltage divider 7 at the input port of a comparator 8. Consequently, an outut 9 is turned to ''L'' and the mirror surface can be detected.
摘要翻译：目的：通过使比较器检测到位表面的电平高于通过分割镜面电平的输出而获得的电平，由于光盘与信号的大小的差异而检测镜面而没有影响在其电压。构成：当马达2旋转并且没有致动跟随盘1的信号轨迹的轨道伺服时，通过由光电转换器4将光学拾取器3的光输出从光转换成电压而获得的输出被提供为在盘1的信息记录表面处的信号（a）和在镜面处的信号（b）。转换器4的输出被输入到电平检测器5,6，以获得信号的最大和最小电平。电平检测器5,6分别检测输入信号的最大和最小电平。电平检测器5的输出被输入到分压器7，分压输出是检测器5的输出的0.7倍，使得检测器6的输出高于分压器7的输出输入端口。因此，一个中断点9变为“L”，并且可以检测镜面。

8. 发明专利

JPS58212379A Reproducing speed controller 失效
标题翻译：再生速度控制器
公开(公告)号：JPS58212379A
公开(公告)日：1983-12-10
申请号：JP9480482
申请日：1982-06-04
申请人： Hitachi Ltd
发明人： KIMURA HIROYUKI , ISO YOSHIMI , INOUE SHIGEKI
IPC分类号： H02P1/16 , G05D13/62 , G11B19/28
CPC分类号： G05D13/62
摘要： PURPOSE:To smoothly control a motor from stationary to the rated rotation by applying a fixed voltage to an object to be controlled for the prescribed period at the starting time, then discriminating the reproducing speed by a discriminator and switching it to a normal speed control. CONSTITUTION:A signal produced by a pickup 3 from a recording medium 2 such as a disc or the like is applied to a synchronizing signal detector 4 and a reproducing speed detector 5, switched by a switching circuit 6, thereby controlling a motor 1 through a frequency voltage converter 8 and a drive circuit 15. A fixed voltage 20 is provided, and connected to a converter 22 which converts it with a signal of a discriminator 21 which discriminates whether the pickup 3 produces a signal or not. Accordingly, the voltage 20 is applied to rotate the motor 1 in the state that the disc 2 is stopped, and switched to the normal speed control when the signal can be produced by the pickup 3, thereby preventing the abnormal operation at the starting time.
摘要翻译：目的：通过在开始时间向要控制的物体施加固定电压，将电机平稳地控制在静止到额定旋转之间，然后通过鉴别器鉴别再现速度并将其切换到正常速度控制。构成：由拾取器3从诸如盘等的记录介质2产生的信号被施加到由切换电路6切换的同步信号检测器4和再现速度检测器5，从而通过一个频率电压转换器8和驱动电路15.提供固定电压20，并连接到转换器22，转换器22用鉴别器21的信号进行转换，鉴别器21的信号鉴别拾取器3是否产生信号。因此，在盘2停止的状态下施加电压20以使电动机1旋转，并且当由拾取器3产生信号时切换到正常速度控制，从而防止起动时的异常运转。

9. 发明专利

JPS58209243A SYSTEM FOR TRANSMITTING AND RECEIVING BROADCAST 失效
公开(公告)号：JPS58209243A
公开(公告)日：1983-12-06
申请号：JP9122282
申请日：1982-05-31
申请人： HITACHI LTD
发明人： AMADA NOBUTAKA , NAKAGAKI HARUSHIGE , INOUE SHIGEKI , NAKAMURA MASAFUMI , ISO YOSHIMI
IPC分类号： G11B15/02 , H04H20/00 , H04H20/28 , H04H60/17 , H04H60/27 , H04H60/37
摘要： PURPOSE:To attain automatic selective recording of broadcast numbers and to prevent recording mistake, by transmitting information representing the content of a broadcast as control information from a bradcast station and controlling the operation of a recorder based on the information at a receiver. CONSTITUTION:Program information from a signal generator 1 at a broadcast station side is converted into a PCM code at an AD converter 2 and multiplexed with information representing the content of a program from a content code generator 3 at a signal multiplexer 4. This multiplex signal is modulated at a modulator 5 and transmitted to a receiver via a transmitting antenna 6 and a repeater 7. A broadcast wave received on a receiving antenna 8 is demodulated at a demodulator 8 at the receiver and separated into the broadcast information and the information representing the content of the program at a signal separating device 10. The program information is inputted to a reproducer 13 and a recorder 14 via a D/A converter 11. Further, the information representing the content of the program is inputted to a controller 12 of recorder and controls the operation of the recorder 14 so as to record selectively the program content designated in advance, only.

10. 发明专利

JPS58209233A TIME DISPLAY SYSTEM 失效
公开(公告)号：JPS58209233A
公开(公告)日：1983-12-06
申请号：JP9122482
申请日：1982-05-31
申请人： HITACHI LTD
发明人： NAKAMURA MASAFUMI , AMADA NOBUTAKA , NAKAGAKI HARUSHIGE , INOUE SHIGEKI , ISO YOSHIMI
IPC分类号： G04G9/00 , G04G99/00 , G09G3/00 , H04B1/16 , H04H20/00 , H04H20/28 , H04H20/86 , H04H60/13
摘要： PURPOSE:To display time on a time display incorporated into a receiver, by detecting and separating time information transmitted in multiplexing with main information by a decoder. CONSTITUTION:In PCM broadcast, for example, an analog signal is converted into a digital signal at an A/D converter 6 at the trasmission side, a standard time generator 7 generates the time information, the main information and the time information of an output of the A/D converter 6 are coded by an encoder 8, the modulation is done by a modulator 9 and the coded information is transmitted to a transmission line via an antenna 23. The information through a transmit ter is demodulated by a demodulator 10 via an antenna 24 at the receiving side, and separated into the main information and the time information at a composite separator 11. The main information is converted into an analog signal by a D/A converter 12 and outputted to a terminal 30. The time is displayed from the time information on the display 13.

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