Television – Cathode-ray tube burn-in prevention
Reexamination Certificate
2004-12-29
2008-08-12
Lee, M. (Department: 2622)
Television
Cathode-ray tube burn-in prevention
C348S511000
Reexamination Certificate
active
07411605
ABSTRACT:
Disclosed is an apparatus for preventing image sticking of a video display appliance and method thereof that can effectively remove a black display region appearing on a border part of a display screen of the video display appliance when an image sticking function is performed. The apparatus includes a control unit for outputting a control signal for zooming an input video signal at a predetermined zooming rate and performing the image-sticking prevention function if an image-sticking prevention mode is set, and a video processing unit for zooming the video signal at the predetermined zooming rate and processing the zoomed video signal to display the zoomed video signal on a display screen according to the control signal from the control unit. By zooming the video signal at the predetermined zooming rate and then by repeatedly performing a slight movement of the zoomed video signal being displayed on the display screen left/right/upward/downward, the black display region can be removed from the display screen.
REFERENCES:
patent: 4677430 (1987-06-01), Falkman et al.
patent: 6747671 (2004-06-01), Saito
patent: 2004/0114040 (2004-06-01), Bellwood et al.
Ked & Associates LLP
Lee M.
LG Electronics Inc.
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