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    • 11. 发明授权
    • Current control circuit
    • 电流控制电路
    • US4242714A
    • 1980-12-30
    • US22868
    • 1979-03-21
    • Susumu YoshidaYoshio IshigakiTamiji Nagai
    • Susumu YoshidaYoshio IshigakiTamiji Nagai
    • H04N3/16H03F3/20H03F3/217H03K4/62H04N3/23H04N3/233H01J29/70
    • H04N3/233H03K4/62
    • In a circuit for controlling the current flow through a coil, such as the horizontal deflection coil of a television receiver, a first switching device including, for example, a first switching transistor and a first damper diode is connected in parallel with a first resonant circuit including a first capacitor and a first coil, which is the coil through which the current flow is to be controlled. A second switching device including for example, a second switching transistor and a second damper diode is connected in parallel with a second resonant circuit including a second capacitor and a second coil. First and second charging capacitors are connected in series with the first and second coils, respectively, and the power is supplied to the first and second resonant circuits for example through a third coil. Switching signals of the same frequency, for example, the horizontal frequency of a video signal, are applied to the first and second switching transistors with the phase difference between such signals being controlled to vary the relative voltages across the first and second charging capacitors and hence "to control" the current flowing through the first coil. The phase difference between the switching signals can be varied by a parabolic correcting signal having the vertical frequency of a video signal to cause the current flow through the horizontal deflection coil to correct for the side pin-cushion distortion of the raster of a cathode ray tube. In another embodiment of the invention, the phase difference between the switching signals can be modulated by a sawtooth wave signal having the vertical frequency so that the voltage across the first or second charging capacitor varies in a sawtooth manner at the vertical frequency and so that if a vertical deflection coil is connected across the first or second charging capacitor a sawtooth shaped current flow will take place through it, causing proper vertical deflection.
    • 在用于控制诸如电视接收机的水平偏转线圈的线圈的电流的电路中,包括例如第一开关晶体管和第一阻尼二极管的第一开关器件与第一谐振电路并联连接 包括第一电容器和第一线圈,其是要控制电流的线圈。 包括例如第二开关晶体管和第二阻尼二极管的第二开关器件与包括第二电容器和第二线圈的第二谐振电路并联连接。 第一和第二充电电容器分别与第一和第二线圈串联连接,并且例如通过第三线圈向第一和第二谐振电路提供电力。 将相同频率的切换信号,例如视频信号的水平频率施加到第一和第二开关晶体管,其中这些信号之间的相位差被控制以改变第一和第二充电电容器两端的相对电压,因此 “控制”流过第一线圈的电流。 可以通过具有视频信号的垂直频率的抛物线校正信号来改变切换信号之间的相位差,以使流过水平偏转线圈的电流校正阴极射线管的光栅的侧向衬垫失真 。 在本发明的另一个实施例中,切换信号之间的相位差可以由具有垂直频率的锯齿波信号调制,使得第一或第二充电电容器两端的电压以锯齿方式在垂直频率处变化,并且如果 垂直偏转线圈跨越第一或第二充电电容器连接,锯齿形电流将通过它发生,引起适当的垂直偏转。
    • 13. 发明授权
    • Apparatus for recording and/or reproducing color video signals
    • 用于记录和/或再现彩色视频信号的装置
    • US4012771A
    • 1977-03-15
    • US651791
    • 1976-01-23
    • Yoshio IshigakiTakao TsuchiyaTsutomu Niimura
    • Yoshio IshigakiTakao TsuchiyaTsutomu Niimura
    • H04N9/84H04N5/79
    • H04N9/84
    • In apparatus for reproducing color video signals recorded in successive parallel tracks on a record medium with the chrominance components of video signals recorded in next adjacent tracks having first and second carriers which differ from each other in respect to their phases or polarity characteristics; and in which a plurality of transducers scan along the tracks one at a time so as to reproduce the video signals recorded in each of said tracks along with cross-talk signals from the tracks next adjacent thereto, means for separating said chrominance signal components from the luminance signal component in the reproduced signals, and a signal processing circuit including a switching circuit and a comb filter provides the separated chrominance components of video signals reproduced from each of said tracks with a common carrier and eliminates therefrom the chrominance components of the cross-talk signals on the basis of said different phases of the first and second carriers with which the chrominance components were recorded in the tracks which are next adjacent to each other: the changing-over of the switching circuit is controlled in response to the phase of the chrominance component carrier that results therefrom so as to ensure phase alignment of the common carrier with which the chrominance components of the video signals reproduced from the successive tracks are provided. Further, control signals are recorded on the record medium to identify those tracks in which video signals are recorded with their chrominance components having said first and second carriers, respectively, and, on reproducing, such identifying control signals are reproduced to control the movements of the transducers and, through such controlled movements, to regulate the changing-over of the switching circuit.
    • 用于再现记录在记录介质上的连续平行轨道中的彩色视频信号的装置,其中记录在下一相邻轨道中的视频信号的色度分量具有相对于它们的相位或极性特性彼此不同的第一和第二载波; 并且其中多个换能器一次沿轨道扫描一次,以便再现记录在每个所述轨道中的视频信号以及与其相邻的轨道的串扰信号,用于将所述色度信号分量与 再现信号中的亮度信号分量,以及包括切换电路和梳状滤波器的信号处理电路,使用各公共载波从每个所述磁迹再现的视频信号的分离的色度分量提供,从而消除串扰的色度分量 基于第一和第二载波的所述不同相位的信号,其中色度分量被记录在彼此相邻的轨道中:响应于色度的相位来控制切换电路的转换 由此产生的分量载体,以便确保共同载体的相位对准 提供从连续轨道再现的视频信号的色调分量。 此外,控制信号被记录在记录介质上,以分别识别具有其具有所述第一和第二载波的色度分量记录视频信号的那些轨道,并且在再现时,再现这些识别控制信号以控制 传感器,并通过这种受控的运动来调节开关电路的转换。
    • 15. 发明授权
    • Method and apparatus for improving the sharpness of a video picture
    • 提高视频画面清晰度的方法和装置
    • US4322742A
    • 1982-03-30
    • US855304
    • 1977-11-28
    • Susumu YoshidaYoshio IshigakiKinya Shinkai
    • Susumu YoshidaYoshio IshigakiKinya Shinkai
    • H04N3/00H01J29/50H01J29/56H04N3/32H04N9/20H04N5/68
    • H01J29/563H04N3/32
    • A method and apparatus for improving the sharpness of a video picture displayed on the screen of a cathode ray tube. At least one electron beam scans the screen in line-scanning and vertical directions, respectively, the electron beam having its intensity modulated in accordance with a video signal. The scanning velocity of the electron beam is modulated in the line-scanning direction in accordance with transitions of the video signal which correspond to transitions between high and low brightness levels of the displayed video picture. Each electron beam is shaped to have a substantially oval shape whose longer axis is disposed in the line-scanning direction and whose shorter axis is disposed in the vertical direction, whereby the oval-shaped beam impinges upon the display screen and the sharpness of the displayed video picture in the vertical direction is improved.
    • 一种用于提高显示在阴极射线管屏幕上的视频图像的清晰度的方法和装置。 至少一个电子束分别沿着线扫描和垂直方向扫描屏幕,电子束的强度根据视频信号进行调制。 根据对应于所显示的视频图像的高亮度和低亮度水平之间的转变的视频信号的转变,电子束的扫描速度在行扫描方向上被调制。 每个电子束被成形为具有大致椭圆形状,其长轴沿行扫描方向设置,并且其短轴设置在垂直方向上,由此椭圆形光束撞击显示屏幕并且显示的清晰度 视频图像在垂直方向改善。
    • 16. 发明授权
    • Muting circuit for a television receiver
    • 电视接收机的静音电路
    • US4280139A
    • 1981-07-21
    • US83415
    • 1979-10-10
    • Takao MogiYoshio IshigakiHisao Okada
    • Takao MogiYoshio IshigakiHisao Okada
    • H04B1/10H04N5/44H04N5/50H04N5/60
    • H04N5/60H04N5/505
    • A muting circuit for a television receiver of the type having a tuner which is operative to select a desired channel in accordance with a channel selection operation to produce a channel select signal representing the selected channel, a detector circuit for detecting whether a video signal is present or not, a muting signal generator circuit supplied with an output from the detector circuit and the channel select signal representing the selection of a predetermined channel to produce a muting signal when the predetermined channel is selected but no output is produced by the detector circuit, and a muting circuit coupled to a low frequency signal transmission path in response to the muting signal from the muting signal generator circuit to cut off or attenuate the transmission of a low frequency signal.
    • 一种用于具有调谐器的类型的电视接收机的静噪电路,该调谐器可操作以根据频道选择操作选择所需频道,以产生表示所选频道的频道选择信号,检测电路是否存在视频信号 或者不是,提供有来自检测器电路的输出的静噪信号发生器电路和表示预定通道的选择的通道选择信号,以在选择预定通道但没有由检测器电路产生输出时产生静噪信号,以及 响应于来自静噪信号发生器电路的静噪信号切断或衰减低频信号的传输,耦合到低频信号传输路径的静噪电路。
    • 18. 发明授权
    • Multipurpose switching circuits utilizing a novel semiconductor device
    • 利用新型半导体器件的多功能开关电路
    • US3980900A
    • 1976-09-14
    • US562176
    • 1975-03-26
    • Yoshio IshigakiTakashi Okada
    • Yoshio IshigakiTakashi Okada
    • H01L29/36H01L21/331H01L27/00H01L29/73H03D1/22H03D3/14H03D5/00H03K17/66H01L29/50
    • H03D5/00H01L27/00H03D1/229
    • A multipurpose switching circuit of the balanced type constituting a pair of switching paths each formed by first and second transistors connected in series and supplied with an input signal and a switching signal, respectively, and a novel semiconductor device of the three-terminal type with first and third terminals connected to both of the pair of switching paths, respectively, and a second terminal connected to an output terminal of the circuit. The respective second transistors of both the paths cause the switching operation to alternate in accordance with the switching signal, and both the input signals supplied to the respective first transistors of the pair of switching paths are alternately switched to the output terminal through the novel semiconductor device in response to the switching operation of the first transistors. The novel semiconductor device has a semiconductor body similar to an ordinary transistor and acts as a bidirectionally conductive element with superior symmetrical characteristics.
    • 一种平衡型的多用途开关电路,其构成一对开关路径,每个开关路径分别由串联连接的第一和第二晶体管提供输入信号和开关信号,并且分别具有三端型的新型半导体器件 以及分别连接到所述一对开关路径两者的第三端子和连接到所述电路的输出端子的第二端子。 两个路径的相应的第二晶体管使得开关操作根据切换信号交替,并且提供给该对开关路径中的各个第一晶体管的两个输入信号通过新颖的半导体器件交替切换到输出端 响应于第一晶体管的开关操作。 新颖的半导体器件具有与普通晶体管相似的半导体本体,并且具有优异的对称特性的双向传导元件。