Patent ID: 6069619
Filing Date: 2000-05-30
Classification: G09G,H04N

Abstract:
A method of displaying the status of a current display power management signaling (DPMS) mode using an on-screen display (OSD) circuit in a display device comprised of a microcomputer having an internal memory, the method comprising the steps of:determining the current DPMS mode based on an input status of video sync signals by:determining whether a horizontal sync signal input is present;determining whether a vertical sync signal input is present when the horizontal sync signal input is present; anddetermining whether the vertical sync signal input is present when the horizontal sync signal input is not present;storing, in the internal memory of the microcomputer, status data corresponding to the determined current DPMS mode; anddriving the OSD circuit for a predetermined time using an OSD drive signal output from the microcomputer, to display on the display device a message indicative of the stored status data.