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US 6,747,671 B1Granted
Video apparatus having function to change size of image and method thereof
AssigneeSony Corporation
InventorSeiji Saito
Life of this patent
Estimating the term…
Abstract
When an image is displayed on a display screen having a larger display area than a displayed image, a size of the displayed image is minutely changed cyclically in order to avoid boundary lines to be recognized when a full size image is displayed on the display screen of the display device. Direction of the size change of the displayed image is in the vertical direction or the horizontal direction. In this case additional non-image signal is added to top, bottom, left and/or right of the displayed image.
Claims6
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.
1 more element
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 display mode in said display device from a first display mode where a first image having an aspect ratio of 16:9 is displayed on a display screen having an aspect ratio of 16:9 in said display device and a second display mode where a second image having an aspect ratio of 4:3 is displayed on said display screen having the aspect ratio of 16:9 in said display device by forming left and right non-image areas so that said 4:3 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 a horizontal direction in said second display mode so that said circularity of said second image is maintained between 0.99 and 1.01.
1 more element
A method for displaying an image, comprising the steps of:
- determining a mode to be selected from a first 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 and a second mode where a second image having an aspect ratio of 16:9 is displayed on said display screen having the aspect ratio of 4:3 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
- 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 a vertical direction so that said circularity of said second image is maintained between 0.99 and 1.01.
A method for displaying an image, comprising the steps of:
- determining a mode to be selected from a first mode where a first image having an aspect ratio of 16:9 is displayed on a display screen having an aspect ratio of 16:9 and a second mode where a second image having an aspect ratio of 4:3 is displayed on said display screen having the aspect ratio of 16:9 by forming top and bottom non-image areas so that said 16:9 aspect ratio of said second image is maintained said second image is displayed with a circularity 1;
- and
- cyclically 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 a horizontal direction so that said circularity of said second image is maintained between 0.99 and 1.01.
Dependencies are inferred from the claim text.