Method for driving a flat-type lamp
US6534928B1 · kind B1 · utility
3Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2002 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jan 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/3927
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving a cold cathode flat fluorescent lamp (CCFFL). The method comprises the steps of generating a pulse-combined signal, applying the pulse-combined signal to an inverter driver circuit which is electrically connected to the CCFFL and causes it to light up, and adjusting the pulse width and the pulse period so that the CCFFL is at a maximum luminance while a luminance uniformity thereof is maximum. Based on the pulse width and the pulse period, the luminance uniformity of the CCFFL is constant while the CCFFL is adjusted for a desired luminance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.