Watertight, low power L.E.D. flashlight
First Claim
Patent Images
1. A flashlight comprising,a. a flashlight housing adapted to hold a battery;
- b. at least one L.E.D. located in said housing;
c. a voltage multiplier circuit coupled between said L.E.D and the battery when the battery is disposed in said housing, said voltage multiplier circuit includes a digital synchronous boost converter that provides an output voltage greater than the input voltage from the battery and synchronizes the input voltage and the output voltage so that the output voltage is maintained as the input voltage decreases; and
, d. an ON-OFF switch connected to said voltage multiplier circuit.
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Abstract
A watertight, low power flashlight is disclosed that uses a voltage tripler and regulator that enables the use of a single AA or lithium battery. The voltage tripler is a “step-up power component” that raises the battery voltage from 1.5 volts to approximately 5 volts required to sufficiently energize the L.E.D.s. The flashlight also includes a lightweight, compact housing with an optional dimmer switch and a side-mounted on/off switch.
76 Citations
10 Claims
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1. A flashlight comprising,
a. a flashlight housing adapted to hold a battery; -
b. at least one L.E.D. located in said housing;
c. a voltage multiplier circuit coupled between said L.E.D and the battery when the battery is disposed in said housing, said voltage multiplier circuit includes a digital synchronous boost converter that provides an output voltage greater than the input voltage from the battery and synchronizes the input voltage and the output voltage so that the output voltage is maintained as the input voltage decreases; and
,d. an ON-OFF switch connected to said voltage multiplier circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification