Lighting device and display equipment
US6166491A · kind A · utility
19Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jun 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device controls power to a discharge lamp according to the temperature detected by a lamp sensor, which detects temperature around the discharge lamp. The discharge lamp has an arc tube and an outer bulb between which an airtight space is defined. Therefore, the lamp can be actuated without reduction in luminosity even at low temperatures. Also, the lamp luminosity rises quickly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.