首页> 外国专利> VIDEO DRIVER CIRCUIT AND METHOD FOR AUTOMATIC GRAY SCALE ADJUSTMENT AND ELIMINATION OF CONTRAST TRACKING ERRORS

VIDEO DRIVER CIRCUIT AND METHOD FOR AUTOMATIC GRAY SCALE ADJUSTMENT AND ELIMINATION OF CONTRAST TRACKING ERRORS

机译:自动调整和消除对比度跟踪误差的视频驱动器电路和方法

摘要

An apparatus (10) and method for the automatic setup of a CRT (12) operating point, or dc signal level (black), as well as the contrast, or gain level (gray), of a video display by sampling the CRT (12) signal level of the individual cathodes (28) and locking the dc signal level to a common dc setup reference and gain level to a value determined by a common contrast control signal and gain reference. An apparatus (10) and method in which a common brightness control (44) signal is modulated by a common contrast control (46) signal such that a brightness control pedestal is added to each video signal (40) path of a video display whereby picture black level does not change with contrast.
机译:一种通过采样CRT(12)自动设置CRT(12)工作点或直流信号电平(黑色)以及对比度或增益电平(灰色)的设备(10)和方法12)各个阴极(28)的信号电平,并将dc信号电平锁定到公共dc设置参考,并且将增益电平锁定到由公共对比度控制信号和增益参考确定的值。一种设备(10)和方法,其中,公共亮度控制(44)信号由公共对比度控制(46)信号调制,使得亮度控制基座被添加到视频显示器的每个视频信号(40)路径,从而图像黑色水平不会随对比度变化。

著录项

  • 公开/公告号DE3380511D1

    专利类型

  • 公开/公告日1989-10-05

    原文格式PDF

  • 申请/专利权人 MOTOROLA INC.;

    申请/专利号DE19833380511T

  • 发明设计人 NEWTON ANTHONY D.;PERKINS GEOFFREY W.;

    申请日1983-05-02

  • 分类号H04N5/18;H04N5/235;

  • 国家 DE

  • 入库时间 2022-08-22 06:31:46

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