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    • 1. 发明专利
    • PRINTER
    • JPS5869082A
    • 1983-04-25
    • JP16716681
    • 1981-10-21
    • HITACHI LTDHITACHI KOKI KK
    • HOSODA YUUJINAKAJIMA ISAOKUROSAWA MAKOTONAKANO HIROSHIGE
    • B41J9/46B41J9/54
    • PURPOSE:To prevent defective printing and burning of a coil by inhibiting mutual magnetic interference between adjacent coils with a controlled number of coils adapted to be driven simultaneously according to a printing pattern while arranged tightly. CONSTITUTION:A discrimination circuit 21 detects the maximum number of coils which are scheduled to be driven simultaneously according to a printing data stored in a buffer 20 while arranged tightly. When the maximum value exceeds the predetermined border value, a discrimination signal B to be provided to a buffer 20, a driving circuit 23, and a paper feed controlling circuit 24 is turned ON. From signals obtained from an encoder through a detection element, a synchronization circuit 22 forms a synchronous signal C determining the timing of printing actions to be performed (m) times in a single process of the recipprocation of a printing section, other synchronous signals D synchronizing the timing of the reversal in the reciprocation of thereof and a direction signal E for indicating the direction of the reciprocating motion thereof.
    • 2. 发明专利
    • PRINTER
    • JPS5862069A
    • 1983-04-13
    • JP16101781
    • 1981-10-12
    • HITACHI LTDHITACHI KOKI KK
    • HOSODA YUUJINAKAJIMA ISAOKUROSAWA MAKOTONAKANO HIROSHIGE
    • B41J2/515B41J9/44B41J9/48G06K15/06
    • PURPOSE:To perform excellent printing even though a printing pattern is changed by controlling a voltage applied to a coil by a controlling means which outputs a control driving signal. CONSTITUTION:A printing data B is inputted into a maximum value circuits 11 in synchronization with clock signals T. The number of the clock signals during the period the printing data B becomes continuously high from the rise of a starting signal A to the rise of a striking signal. A maximum value M is judged and stored in the circuit 11. A function circuit 12 determines a voltage control signal F corresponding to the maximum value 7 based on the function defined in the inside. A voltage control circuit 13 converts a power source voltage E to a driving voltage K which is proportional to a voltage control signal F. A pulse generating circuit 14 generates a pulse W having a specified pulse width in synchronization with the rise of the striking signal. A driving circuit 15 applies the driving voltage K to the coil 4, whose driving is specified, for the period of the pulse width of the pulse W in synchronization with clock signal T and drives a printing hammer 6.
    • 4. 发明专利
    • PRINTER
    • JPS57212073A
    • 1982-12-27
    • JP9648881
    • 1981-06-24
    • HITACHI LTDHITACHI KOKI KK
    • HOSODA YUUJINAKAJIMA ISAOMURANO SHIYUNJIKUROSAWA MAKOTONAKANO HIROSHIGE
    • B41J2/30B41J9/38B41J9/44
    • PURPOSE:To prevent the deviation of printing dot position, unevenness of printing concentration, and blankness of printing by normally operating a printing hammer by a method in which voltage to be applied to a coil is controlled in such a way as to interrupt the increase in suction force resulting from excessive magnetic flux. CONSTITUTION:The number of magnetically driven parts 6 is detected as the reference voltage E proportional to it and then converted into reference voltage F by a function circuit 14, and drive voltage G to be applied to a coil 11 is varied in proportion to the reference voltage F. The function circuit 14 is so designed that the reference voltage F becomes an increasing function of the reference voltage E. Thus, as the number of the magnetically driven parts 6 increases, the drive voltage G is increased and the demagnetization amount Q is reduced. The increasing function is so set that the demagnetization amount Q is always kept at a proper value, and therefore, even when the number of the magnetically driven parts 6 is varied by printing patterns, suction force to be applied to the printing hammer 4 is not changed and printing failure does not occur because the demagnetization amount Q is always kept at a proper value.
    • 5. 发明专利
    • Image pickup device
    • 图像拾取器件
    • JPS60197085A
    • 1985-10-05
    • JP5211384
    • 1984-03-21
    • Hitachi Ltd
    • IWAMOTO TAROUKAMESHIMA KOUJIHOSODA YUUJIFUJIE MASAKATSUYAMAMOTO HIROSHI
    • H04N7/18G02B23/24
    • PURPOSE: To save an energy required for lighting by lighting a flash lamp so as to record a video of a television camera and operating synchronizingly the flash lamp and a recording means so as to reduce the lighting time.
      CONSTITUTION: A television camera 2 is of external synchronism type and when the camera 2 receives a trigger signal 9 generated from a camera controller 8 having a timer, a video for one frame's share is picked up. The video signal is recorded to a picture recorder 10 and the timing of the recording is synchronized with the television camera by using the signal 9. Moreover, the flash lamp 3 receives the signal 9 similarly and is lighted. Thus, the picture at the moment when the lamp 3 is lighted is recorded to the device 10. The recorded picture is reproduced repetitively and transmitted from an antenna 6A to the station through a communication equipment 5A as a radio wave.
      COPYRIGHT: (C)1985,JPO&Japio
    • 目的:通过点亮闪光灯来节省照明所需的能量,以记录电视摄像机的视频,并同步操作闪光灯和记录装置,以减少照明时间。 构成:电视摄像机2具有外部同步型,并且当摄像机2接收到具有定时器的相机控制器8产生的触发信号9时,拾取一帧共享的视频。 视频信号被记录到图像记录器10,记录的定时通过使用信号9与电视摄像机同步。此外,闪光灯3类似地接收信号9并被点亮。 因此,将灯3点亮的时刻的图像记录到装置10.记录的图像被重复地再现,并通过作为无线电波的通信设备5A从天线6A发送到车站。
    • 6. 发明专利
    • Photographic device
    • 摄影器材
    • JPS60196738A
    • 1985-10-05
    • JP5211484
    • 1984-03-21
    • Hitachi Ltd
    • KAMESHIMA KOUJIOOBA SAYOKOFUJIE MASAKATSUHOSODA YUUJIIWAMOTO TAROU
    • G03B11/00G03B15/00G03B17/12
    • PURPOSE: To obtain automatically good images, from which reflected light is eliminated of objects, such as the surface of water or the like controlling a polarizing filter, which is arranged rotatably in front of a camera, so that the quantity of polarized light is minimized.
      CONSTITUTION: The rotation angle of a polarizing filter 2 provided rotatably in front of a camera 1 is operated on a basis of the quantity of light of a photographic image from the camera 1 by a controller 4. A comparator 7 in the controller 4 compares the present overall quantity of light from an integrator 5 with the just preceding overall quantity of light from a delay device 6 to output a variation of the overall quantity of light due to variance of the angle of the filter 2. A discriminator 8 outputs a control angle signal in accordance with the variation of the overall quantity of light from the comparator 7 and the just preceding angle change value from a delay device 9. In such constitution, the filter 2 is controlled again by a motor 3 in accordance with variance of the quantity of light of the photographic image, and the camera 1 photographs accurately the object with reflected light eliminated.
      COPYRIGHT: (C)1985,JPO&Japio
    • 目的:为了获得自动地获得好的图像,从而从物体(诸如控制偏振滤光器的水面等)消除反射光,该偏振滤光器可旋转地布置在照相机的前面,使得偏振光的量最小化 。 构成:可旋转地设置在照相机1的前方的偏振光滤光器2的旋转角度通过控制器4根据照相机1的摄影图像的光量进行操作。控制器4中的比较器7将 将来自积分器5的总光量与来自延迟装置6的刚好的总光量相比较,以输出由于滤波器2的角度变化引起的总体光量的变化。鉴别器8输出控制角 根据来自比较器7的总光量的变化以及来自延迟装置9的刚好的前角变化值的信号。在这种结构中,滤波器2根据量的变化由电动机3再次控制 摄影图像的光,照相机1准确地拍摄反射光的物体。