Image display system scrolling image at high speed using...

Details Image display system scrolling image at high speed using... Image display system scrolling image at high speed using...

2006-04-25

2006-04-25

Chauhan, Ulka J. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics display memory system

For storing compressed data

C345S536000, C345S503000, C345S531000, C382S113000, C382S232000, C382S254000, C701S023000, C701S028000, C701S200000, C715S784000, C340S995100, C340S995140, C340S995150, C340S995180

Reexamination Certificate

active

07034839

ABSTRACT:
When a user pushes a scroll-direction key, an ECU obtains, from a memory, a division map corresponding to a division located in a direction designated by the scroll-direction key. The ECU then outputs the division map to a display controller. The display controller compresses the division map to store in a VRAM. At scrolling a displayed image, the display controller expands the compressed division map. It then outputs, to an image signal generator, only a necessary portion of the expanded division map. Thereby, the displayed image can be scrolled at high speed and easily recognizable for the user.

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