Flash light emitting device
US6476564B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Oct 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The flash light emitting device includes a charging circuit for charging the light emitting energy into a capacitor by boosting a power supply voltage, and a light emitting circuit for making a flash light emitting tube emit light with the use of the energy of the capacitor. The flash light emitting device further includes a timer which counts a lapsed time from a point of time that a given amount of charging to the capacitor performed by the charging circuit is completed, and a charging controller which controls whether a next charging operation by the charging circuit is to be started or not based on the lapsed time counted by the timer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.