公开(公告)号：GB2282307A

公开(公告)日：1995-03-29

申请号：GB9319766

申请日：1993-09-24

Applicant: IBM

Inventor： KNOX ANDREW RAMSAY ,  MARTINEZ PETER ,  ANWYL EDWARD ,  BEETESON JOHN STUART ,  KERIGAN SHAUN

IPC: G06F1/32 ,  G09G5/00 ,  G09G5/10

Abstract: Display apparatus comprises a display screen (400) and a drive circuit (401) connected to the display screen (400) to generate an image on the display screen (400) in response to an input video signal (R,G,B). A timer (405) generates a count in response to a clock signal. A detector (403,404,402) also receives the input video signal and resets the timer (405) on detection of a change in image content between successive frames of the input video signal (R,G,B). Control means (402) is connected to the timer (405) and to the drive circuit (401) for at least partially disabling the drive circuit (401) in response to the count stored in the timer (405) exceeding a predetermined threshold.