Cold cathode lamp and lamp control circuit
US6724154B2 · kind B2 · utility
0Cited by
2References
13Claims
0Family size
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cold cathode gas discharge lamp unit and control circuit for controlling the light emission of the cold cathode gas discharge lamp. A lamp unit includes a dc power source and a control circuit for converting into a high frequency drive signal across the lamp wherein each cycle of the drive signal includes an ignition period with a signal level sufficient to initiate gas conduction, a sustaining period with a signal level sufficient to sustain gas conduction, and an off period with a signal level below the sustaining level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.