Image reproduction interface
US4604615A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1983 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Oct 28, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/222
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reproduction interface disposed between a CPU, and a display device for reproducing an image based on code signals from the CPU corresponding to multiple image elements. The interface comprises a random-access memory for temporarily storing the code signals, and a multiplexor for selecting, for a first period, an address bus for the CPU to address the memory for storing therein the code signals, and for a second period, a refresh address bus for a controller of the display device to address the memory for reading out therefrom the code signals to reproduce the image. A sum of said first and second periods is equal to an interval at which the image elements are reproduced, whereby both storage and retrieval of the code signals into and from the memory may be effected within each reproduction interval in a time-sharing manner, thus reducing an idle or waiting time of the CPU and increasing a rate of updating the image on the display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.