Image display apparatus having a plurality of displays
US4845480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Jan 15, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/395
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image display apparatus, a frame memory for storing original data and a plurality of display memories for storing data to be displayed are used as memories for storing image data. Data transfer from the frame memory to the display memories is performed in accordance with a DMA scheme. The display memories as destinations of the data transfer are selectively switched. Since the image data transfer from the display memories is performed through a programmable data conversion memory, data conversion as image processing can be performed. The image data is read out from each of the display memories and is displayed on each of a plurality of display systems. An address signal for reading out at least a desired part of the image data from the frame memory is generated in synchronism with a common sync signal used when the image data is read out from the display memories.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.