Patent ID: 6424341
Filing Date: 2002-07-23
Classification: G09G,H04N

Abstract:
A device for controlling an on-screen display(OSD) in muting video signals on a cathode ray tube (CRT), comprising:microcomputer means for generating a cut-off signal to mute the video signals upon sensing a variation in horizontal and vertical sync signals provided thereto from a video card, and for generating a cut-off signal to mute the video signals upon sensing a variation in horizontal and vertical sync signals provided thereto from a video card, for generating an OSD control signal, and for generating blank data by executing an OSD erase control program for erasing the OSD; OSD integrated circuit (IC) means including a data section responsive to the blank data and a control section responsive to the OSD control signal when the variation in the horizontal and vertical sync signals provided to the microcomputer means is sensed for erasing the OSD; and amplifier means responsive to the cut-off signal generated by the microcomputer means for muting the video signals.