Patent ID: 6747671
Filing Date: 2004-06-08
Classification: G06F,G09G

Abstract:
A video display apparatus, comprising:supply means for supplying display signals to a display device; mode control means coupled to said supply means for selecting a display mode in said display device from a first display mode where a first image having an aspect ratio of 4:3 is displayed on a display screen having an aspect ratio of 4:3 in said display device and a second display mode of where a second image having an aspect ratio of 16:9 is displayed on said display screen having the aspect ratio of 4:3 in the display device by forming top and bottom non-image areas so that said 16:9 aspect ratio of said second image is maintained and said second image is displayed with a circularity of 1; and size change means coupled to said supply means for cyclically and gradually widening and gradually narrowing minutely by a minute change value, at a predetermined time interval, a size of said second display image displayed on said display device in said vertical direction in the second display mode so that said circularity of said second image is maintained between 0.99 and 1.01.