Ballast for cold cathode fluorescent lamp
US7714518B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2007 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Jul 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2822
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast includes a drive circuit, a half-bridge inverter, a transformer, and a filter. The drive circuit is configured for generating a drive signal on receiving a power. The half-bridge inverter is configured for generating a power AC signal according to the drive signal generated by the driver. The power AC signal is fed back to the drive circuit, for determining a non-overlap time of the drive signal. The transformer is configured for generating a high frequency signal based on the power AC signal. The high frequency signal is configured for lightening a lamp, and maintaining the lightening of the lamp. The filter is used for filtering out noise in the feedback power AC signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.