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Priority claimed from US11/007,771external-prioritypatent/US7579782B2/en
Priority claimed from US11/351,307external-prioritypatent/US7723921B2/en
Application filed by Mag Instr IncfiledCriticalMag Instr Inc
Publication of TW200742490ApublicationCriticalpatent/TW200742490A/en
Circuit Arrangement For Electric Light Sources In General
(AREA)
Abstract
A portable electronic device, such as a flashlight, with a circuit for reducing the initial surge of current that is sent through the lamp filament when a flashlight is turned on is provided. The circuit reduces the stresses placed on the lamp bulb when it is turned on, thereby extending the life expectancy of the lamp bulb. A flashlight with beacon mode that produces light according to a duty cycle of less than 11% is also disclosed.
TW096104423A2004-12-072007-02-07Improved circuitry for portable lighting devices and portable rechargeable electronic devices
TW200742490A
(en)