Method and system for displaying images on a display device

Details Method and system for displaying images on a display device Method and system for displaying images on a display device

1996-11-19

1998-11-17

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Plural graphics processors

345162, 345435, 345113, G06F 1300

Patent

active

058383360

ABSTRACT:
The present invention provides an improved method and system for displaying images on a display screen. It includes a display screen, an on-screen memory, a cursor memory, and a display processor. The display processor in a normal mode displays on the display screen a graphics image stored in the on-screen memory. When the display processor is in an overlay mode, it simultaneously displays the stored graphics image, and the image stored in the cursor memory in an image window over a selected portion of the stored graphics image in the on-screen memory. The image window hides the selected portion of the stored graphics image. While the display processor is in the overlay mode, a second image is prepared and stored in the selected portion of the stored graphics image which is hidden by the image window. Since the image displayed in the image window hides the second image being prepared, the second image preparation is transparent to a user and does not interfere with the display of the image stored in the cursor memory. When the second image is stored, the display processor is switched to the normal mode to simultaneously display the stored graphics image with the stored second image in the selected portion of the stored graphics image.

REFERENCES:
patent: 5559533 (1996-09-01), Hicok et al.
patent: 5598525 (1997-01-01), Nally et al.

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