The present invention discloses a screen blanker for a monitor of a computer system, which will automatically clear the data image on the display screen of a monitor of a computer system after the computer has not been operated for a predetermined time period, and the data image which had disappeared...http://www.google.de/patents/US5059961?utm_source=gb-gplus-sharePatent US5059961 - Screen blanker for a monitor of a computer system
