Pulse generating apparatus for xenon lamp and lighting method thereof
US4742277A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1987 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jul 29, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulse generating apparatus includes a base current supply section for generating a constant DC current having a first prescribed current level for turning on a xenon lamp, and a pulse current section for adding a pulse current having a second current level greater than the first current level and a prescribed pulse duration within a prescribed repetition period to the constant DC current. The base current supply section and pulse current section should satisfy the following equations: EQU 1.4.ltoreq.Imax/Imini.ltoreq.6 EQU 0.2.ltoreq.t/T.ltoreq.0.7 EQU T.ltoreq.1/40 Where Imax is the sum of the first and the second prescribed current levels, Imini is the first prescribed current level, T is the prescribed repetition period, and t is the prescribed pulse duration. When the pulse current added to the DC current is supplied to a xenon lamp, the xenon lamp outputs a strong light during the pulse duration of the pulse current, and a feeble light during the absence of the pulse current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.