Fluorescent lamp device
US4978890A · kind A · utility
24Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jun 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent lamp device which is used for backlighting of a liquid crystal display and in which a Peltier element is thermally coupled with a portion of a fluorescent lamp and a temperature sensor is provided at that portion to be cooled. In accordance with the temperature of the cooled portion detected by the temperature sensor the driving of the Peltier element is controlled so that the temperature of the cooled portion is reduced under a predetermined temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.