Display unit having plurality of frame buffers

Details Display unit having plurality of frame buffers Display unit having plurality of frame buffers

1994-05-03

1999-12-21

Luu, Matthew

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345511, G09G 514

Patent

active

060055723

ABSTRACT:
A display unit which displays images on a screen and transfers images from a first area on the screen to a second area on the screen. A plurality of frame buffers each have an area corresponding to the total area of the screen. A mask plane stores data indicating a respective frame buffer of the plurality of frame buffers in which image data for each pixel of the screen is stored. Images displayed on the screen are formed by image data selected from the plurality of frame buffers in accordance with the data stored in the mask plane. A transfer mechanism transfers, within each of the plurality of frame buffers, image data in a first area of a respective frame buffer corresponding to the first area on the screen to a second area of the respective frame buffer corresponding to the second area on the screen. The display unit uses the transferred image data in the second areas of the plurality of frame buffers to move the images in the first area on the screen to the second area on the screen.

REFERENCES:
patent: 4780712 (1988-10-01), Itaya
patent: 4897636 (1990-01-01), Nishi
patent: 4940971 (1990-07-01), Hasebe
patent: 5001469 (1991-03-01), Pappas
patent: 5029112 (1991-07-01), Sakamoto
patent: 5101365 (1992-03-01), Westberg
Micro Diversions, Inc. Advertisement, "Screensplitter" Byte. May 1978. p. 81.
Barden, W. "Color Computer Assembly Language Programming" Ft Worth 1983. pp. 25-29.

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