Electronic flash unit and manufacturing method thereof
US7652434B2 · kind B2 · utility
0Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2002 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Apr 16, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0535
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electronic flash unit disclosed comprises: a transformer (14) to vary voltages of a power supply; an accumulator (16) composed of a main capacitor (17) to charge an electric energy supplied from the transformer (14); a lamp unit (4) provided with a flashlamp (20), set inside of a reflector (19), that flashes by discharging of energy storages in the main capacitor (17) upon applying a voltage on a trigger terminal (21); and a trigger circuit (10) to generate the voltage to apply on the trigger terminal (21), wherein at least the lamp unit (4) is coated with an insulation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.