Flashlight boost regulator
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United States of America Patent
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-
Jun 12, 2001
Grant Date -
N/A
app pub date -
Aug 3, 1999
filing date -
Aug 3, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A boost regulator circuit is designed to maintain nearly constant intensity from a flashlight lamp, compensating for the drop in battery voltage over an operating lifetime. The quality of the light output is improved, and battery life is extended. An asynchronous boost regulator circuit and two synchronous boost regulator circuits are shown. The regulator circuit begins boosting after battery voltage has fallen by 15-20%, and maintains output voltage at a substantially constant level until a major portion of the stored battery energy has been consumed. A circuit assembly is shown that can be used to retrofit existing flashlights. The circuit assembly resides on a disk-shaped circuit board that can be placed between the lamp and an adjacent battery. Contacts formed on the circuit board provide connections to the battery, the lamp, and to a common connection point such as ground.
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