Method of initiating lighting of a discharge lamp, circuit for lighting a discharge lamp, light source device using the circuit, and optical instrument incorporating the light source device
US6756744B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Oct 31, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/388
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of initiating lighting of a discharge lamp is provided including applying to the discharge lamp to be lighted an initiating voltage resulting from superimposition of a step-up pulse voltage of 1,000 to 3,000 V onto a voltage of 500 to 1,500 V which is continuously applied to the discharge lamp. Also provided is a circuit for lighting a discharge lamp, including a ballast for lighting the discharge lamp, and a low-voltage igniter connected to the ballast for initiating lighting of the lamp, the low-voltage igniter comprising: a lighting diode having an input side connected to an output side of the ballast and an output side connected to the discharge lamp; and a step-up device for superimposing step-up pulses onto the output of the lighting diode via a step-up pulse supply branch line connected to the output side of the lighting diode in initiating lighting of the discharge lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.