Display unit displaying images at a refresh rate less than the rate at which the images are encoded in a received display signal
US6054980A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1999 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jan 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.