Display unit displaying images at a refresh rate less than the r

Details Display unit displaying images at a refresh rate less than the r Display unit displaying images at a refresh rate less than the r

1999-01-06

2000-04-25

Saras, Steven J.

Computer graphics processing and selective visual display system

Display driving control circuitry

345202, 345 97, 348441, G09G 500

Patent

active

060549807

ABSTRACT:
A display unit receiving a display signal having source image frames encoded at an encoding rate (FR.sub.S). A display screen may be refreshed at a refresh rate which is less than the encoding rate. An actual refresh rate (FR.sub.D) is determined such that FR.sub.S /FR.sub.D =(N+1)/N. To satisfy this equation, the actual refresh rate (FR.sub.D) may be selected to be slightly different from the target refresh rate supported by the display screen. Pixel data elements representing source image frames (received at FR.sub.S) may be written into a frame buffer, and the pixel data elements may be retrieved at a frequency determined by refresh rate FR.sub.D. However, at least a part of every (N+1).sup.st source image frame is not written into the frame buffer to avoid image tearing problems.

REFERENCES:
patent: 5321419 (1994-06-01), Katakura et al.
patent: 5371518 (1994-12-01), Hannah
patent: 5446496 (1995-08-01), Foster et al.

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