White position taillight for aircraft
First Claim
Patent Images
1. A white appearing aircraft position light comprising:
- a support;
a plurality of LEDs mounted to the support, said LEDs consisting essentially of cyan LEDs and amber LEDs, said LEDs selected to produce light flux in a ratio of approximately three amber flux units for every one cyan flux unit; and
a circuit for energizing said LEDs, wherein said LEDs produce a composite light when energized, said composite light appearing white but including little or no light having a wavelength above 600 nm.
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Abstract
An aircraft position light employs selected colored LEDs to produce a white appearing warning light with a reduced light component in the amplification spectrum of night vision imaging equipment. A combination of amber and cyan LEDs are selected to produce approximately three amber flux units for every cyan flux unit resulting in a white composite light. Both of the selected LEDs have dominant wavelengths of less than 600 nm.
33 Citations
20 Claims
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1. A white appearing aircraft position light comprising:
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a support;
a plurality of LEDs mounted to the support, said LEDs consisting essentially of cyan LEDs and amber LEDs, said LEDs selected to produce light flux in a ratio of approximately three amber flux units for every one cyan flux unit; and
a circuit for energizing said LEDs, wherein said LEDs produce a composite light when energized, said composite light appearing white but including little or no light having a wavelength above 600 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An aircraft position light comprising:
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at least one PC board;
a plurality of LEDs mounted to said PC board, said plurality of LEDs comprising cyan LEDs and amber LEDs; and
a circuit for simultaneously energizing said plurality of LEDs, wherein said plurality of LEDs are selected to produce a composite light when energized, said composite light having a chromaticity center tolerance of approximately X=0.418 and Y=0.397, said composite light having a white hue. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A white appearing warning light comprising:
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a plurality of LEDs each having a dominant wavelength below 600 nm; and
an electrical circuit for generating current to energize said LEDs to produce a composite light, wherein said LEDs comprising said plurality of LEDs are selected so that said composite light has an aviation white chromaticity. - View Dependent Claims (18, 19, 20)
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Specification