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    • 3. 发明授权
    • Digital convergence correction device
    • 数字会聚校正装置
    • US5059872A
    • 1991-10-22
    • US670177
    • 1991-03-15
    • Kuninori MatsumiTadahiro KawagishiMasahiro KameMakoto ShiomiKousuke OzekiMichitaka Ohsawa
    • Kuninori MatsumiTadahiro KawagishiMasahiro KameMakoto ShiomiKousuke OzekiMichitaka Ohsawa
    • H04N9/28
    • H04N9/28
    • The digital convergence correction device is used for a projection-type television receiver having a Braun tube with an aspherical surface fluorescent screen and a projection lens system with an aspherical surface plastic lens attached to the display screen of th Braun tube. In the digital convergence correction device, a digital memory stores digital correction data corresponding to correction values at the convergence adjustment points on the display screen that is divided in the horizontal and vertical directions. A multiplexer reads the digital correction data out of the digital memory, and implements the time division multiplexing for the data. A D/A converter receives the multiplexed data from the multiplexer, and converts it into an analog signal. The device is provided with sample-holding circuits for making coincident timing for the outputs of the time division multiplexing process, so that no phase shift arises at the time division process and multi-channel time division process is made possible. Among numbers of time divisions, an optimal one can be chosen to meet the system requirement. Consequently, the number of D/A converters is reduced thereby to down-cost the digital convergence correction device. The convergence correction device operates in accordance with the correction signals held in the respective sample-holding circuits.
    • 数字会聚校正装置用于具有带有非球面荧光屏的布朗管和投影透镜系统的投影型电视接收机,该系统具有安装在布劳恩管显示屏上的非球面塑料透镜。 在数字会聚校正装置中,数字存储器将对应于在水平和垂直方向上划分的显示屏上的会聚调整点处的校正值对应的数字校正数据。 多路复用器从数字存储器读出数字校正数据,并对数据进行时分复用。 D / A转换器从多路复用器接收多路复用数据,并将其转换为模拟信号。 该装置具有用于对时分复用处理的输出进行重合定时的采样保持电路,使得在时分处理和多通道时分处理都不会产生相移。 在时间分割的数量中,可以选择最佳的一个来满足系统要求。 因此,D / A转换器的数量减少,从而降低数字会聚校正装置的成本。 会聚校正装置根据保持在各个采样保持电路中的校正信号进行工作。
    • 9. 发明授权
    • Color CRT drive apparatus and CRT display including a brightness
adjustment
    • 彩色CRT驱动装置和CRT显示器,包括亮度调节
    • US5400086A
    • 1995-03-21
    • US124089
    • 1993-09-21
    • Yuji SanoKouji KitouIkuya AraiMichitaka OhsawaYoshio Amemiya
    • Yuji SanoKouji KitouIkuya AraiMichitaka OhsawaYoshio Amemiya
    • H04N9/73
    • H04N9/73
    • A picture tube drive apparatus for driving a color picture tube. The picture tube drive apparatus comprises a video output circuit which receives video signals, amplifies them and outputs the amplified video signals, a picture tube drive circuit which receives the video signals amplified by the video output circuit for driving said color picture tube based on video signals, said picture tube drive circuit having means for detecting a beam current corresponding to the brightness of each color flowing through said picture tube, a picture tube connected with said picture tube drive circuit for displaying the video signals, a white balance control circuit into which a detection value of a beam current detected by said picture tube drive circuit is inputted and for outputting video signal level compensation signals for adjusting the white balance of the video image displayed on said picture tube to said picture tube drive circuit. A color picture tube in which an electron shield frame having at most a width which will not prevent electron beam from flying onto said shadow mask from an electron gun and having a function to suppress the reflection of the electron beam on a fluorescent screen is disposed on the inner peripheral surface of said electron on the side of the electron gun with respect to a shadow mask mounting position in the color tube.
    • 一种用于驱动彩色显像管的显像管驱动装置。 显像管驱动装置包括视频输出电路,其接收视频信号,放大并输出放大的视频信号;显像管驱动电路,其接收由视频输出电路放大的视频信号,用于基于视频信号驱动所述彩色显像管 所述显象管驱动电路具有用于检测与流过所述显像管的每种颜色的亮度相对应的光束电流的装置,与所述显像管驱动电路连接以用于显示视频信号的显像管,白平衡控制电路, 输入由所述显像管驱动电路检测的光束电流的检测值,并输出用于将显示在所述显像管上的视频图像的白平衡调整到所述显像管驱动电路的视频信号电平补偿信号。 一种彩色显像管,其中电子屏蔽框架具有最大不能防止电子束从电子枪飞到所述荫罩上并具有抑制电子束在荧光屏上的反射的功能的宽度,设置在 相对于彩色管中的荫罩安装位置,电子枪侧面的所述电子的内周表面。