Control method for discharge lamp
US7301285B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Jul 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/382
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for controlling a discharge lamp by a power controlling device on an automobile vehicle includes a starting step and a switching step. The device supplies electricity to the lamp. In the starting step, the discharge lamp starts to emit a light such that the device supplies a first electricity. In the switching step, the device switches from the first electricity to a second electricity so that the lamp maintains to emit the light with the second electricity, which is smaller than the first electricity. In the switching step, a temperature of the lamp is decreased with a temperature gradient, which is equal to or smaller than a predetermined gradient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.