Device for controlling a display with a plurality of strings of light-emitting elements
US5028915A · kind A · utility
3Cited by
7References
8Claims
0Family size
Inventor
Key dates
| Filing date | Aug 24, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Aug 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2014
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for controlling a display with a number of strings of light-emitting elements (particularly bulbs) connected in series to offer a aesthetically favorable jeu de lumiere, having, apart from a timing generator and a driving circuit for the display, a read only memory ROM, a programmable logic array PLA, two dividers and two address counters. With this device, all the aesthetically practical patterns can be repeated in desired times with varying speeds while requiring a very small storage capacity of the ROM, thus considerably saving the cost of production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.