VIDEO OUTPUT STAGE WITH SELF-REGULATING BEAM CURRENT LIMITING

摘要

A video processing system includes a video output driver stage (20) which is capable of automatically self-regulating the peak beam current output provided to a display. The system includes a video output driver stage (20) with a video signal input (b) and a video signal output (B) for providing an amplified video signal. The video output driver stage (20) comprises means for amplifying the video signal input to form the video signal output and conveying the amplified video signal output to the image reproducing display device. The system further comprises a sensing output for providing thereat a sensed signal (V4) representative of current (IB) conducted by said image reproducing display device (1). The system also includes a sensing and control means (28, 29; Q108) for sensing the sensed signal and for providing a feedback signal (I6) to an input component (Q101) of the video output driver stage for limiting the current conducted by said image reproducing display device to a predetermined value.