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
展开▼
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
展开▼
页面导航
摘要
著录项
相似文献
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.
展开▼