Led dot matrix drive method and apparatus
US5812105A · kind A · utility
243Cited by
38References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jun 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for driving a light emitting diode (LED) display having a matrix of LEDs of different colors wherein different color LEDs of the matrix are commonly connected so that a voltage applied to one LED of the commonly connected LEDs is applied to all of the commonly connected LEDs. Different voltages are applied to the commonly connected different color LEDs in the matrix of LEDs. A drive circuit may have commonly connected drivers which multiplex voltages to an array of commonly connected LEDs such that different voltages may be applied to LEDs having different operating voltages. An LED display is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.