Discharge lamp circuit heat-sinked to the lamp cap
US4644226A · kind A · utility
12Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1986 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | May 13, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/523
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-pressure discharge lamp comprising a discharge vessel (3) enclosed by an outer envelope (1) provided with a neck (10) which is adjoined by a sleeve (20) of a lamp cap (2). The lamp cap (2) accommodates an electrical circuit provided with a semiconductor switching element (26) which controls the discharge current in the operating condition of the lamp. The semiconductor switching element (26) is provided with a cooling member (24) which is preferably secured to the sleeve (20). This lamp may be used without further expedients in combination with a stabilization ballast not adapted to the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.