Electronic Zoom Portable Electric Lamp
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United States of America Patent
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app pub date -
Nov 21, 2006
filing date -
Nov 21, 2005
priority date (Note) -
Abandoned
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Abstract
The portable electric lamp, for example a headlamp, is a lamp with light-emitting diodes comprising at least two distinct light sources (1a, 1b, 1c) having different emission angles. An electronic control circuit controls each of the light sources independently and comprises a distribution control input to select the percentage of the total power supplied to each of the light sources. Control of the distribution can be continuous or by steps. It is preferably combined with a power control input. The distribution control and power control inputs can be formed by two distinct inputs or by a single power and distribution control input. Selection is preferably performed by means of one or two rotary knobs.
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