Cathode ray tube controller
US4868556A · kind A · utility
5Cited by
5References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 24, 1987 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Jul 24, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube controller holds a write-in address and displaying image data or a read-out address from a central processing unit. The cathode ray tube controller makes access to a memory by a write-in or read-out address from the central processing unit during a period in which the displaying image data in a horizontal scanning period are not read out from the memory, so that the read or write operation with respect to the memory can be carried out during the horizontal scanning period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.