LED illumination module with fixed optic and variable emission pattern
First Claim
1. An LED light assembly emitting a variable light emission pattern with no moving parts, comprising:
- a beam-forming optic having a focus;
a plurality of light emitting dies including a center die having an optical axis AO passing through said focus so that light from said center die is emitted from said optic as a collimated beam, and a plurality of peripheral dies surrounding said center die, each said peripheral die having an optical axis offset from optical axis AO so that light from said peripheral dies is emitted from said optic in a divergent emission pattern radially outward of said collimated beam;
a controller operatively connected to said center die and said peripheral dies to vary power delivered to said center die and said peripheral dies, said controller configured to independently vary the power applied to said center die and said peripheral dies from 0% to 100% of a maximum sustainable power,wherein in a first mode of operation, said controller applies 100% of said maximum sustainable power to said center die to generate said collimated beam, and in a second mode of operation, said controller reduces power applied to said center die and increases power applied to said peripheral dies to generate a divergent beam, the power applied to said center die in said second mode being at least 10% of said maximum sustainable power.
1 Assignment
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Accused Products
Abstract
An LED illumination module including an LED lamp with a plurality of light emitting dies on a substrate in combination with an optic having a single focus. The light emitting dies include a single center light emitting die centered on an optical axis and peripheral dies arranged around the center die. The illumination module includes a beam forming optic having a single focus arranged over the LED lamp with the focus on the optical axis of the center die. Light emitted from the center die is substantially collimated by the optic in a focused “spot” emission pattern. Light emitted from the peripheral dies results in a more dispersed or divergent “flood” emission pattern. The center die and peripheral dies are independently controlled and the power delivered to the dies can be varied independently to generate different light emission patterns using the same optic.
35 Citations
17 Claims
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1. An LED light assembly emitting a variable light emission pattern with no moving parts, comprising:
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a beam-forming optic having a focus; a plurality of light emitting dies including a center die having an optical axis AO passing through said focus so that light from said center die is emitted from said optic as a collimated beam, and a plurality of peripheral dies surrounding said center die, each said peripheral die having an optical axis offset from optical axis AO so that light from said peripheral dies is emitted from said optic in a divergent emission pattern radially outward of said collimated beam; a controller operatively connected to said center die and said peripheral dies to vary power delivered to said center die and said peripheral dies, said controller configured to independently vary the power applied to said center die and said peripheral dies from 0% to 100% of a maximum sustainable power, wherein in a first mode of operation, said controller applies 100% of said maximum sustainable power to said center die to generate said collimated beam, and in a second mode of operation, said controller reduces power applied to said center die and increases power applied to said peripheral dies to generate a divergent beam, the power applied to said center die in said second mode being at least 10% of said maximum sustainable power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An LED light assembly emitting a variable light emission pattern with no moving parts, comprising:
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a beam-forming optic having a focus in a first plane; a plurality of light emitting dies arranged on a support to emit light into said beam forming optic, said plurality of light emitting dies including a plurality of peripheral dies in said first plane, said plurality of peripheral dies having optical axes radially offset from said focus; a controller operatively connected to apply power independently to each of said peripheral dies, application of power to a peripheral die resulting in light emission from said optic at a position diametrically across from a position of said peripheral die on said substrate, said controller configured to apply power to selected peripheral dies to generate a moving light emission pattern from said optic. - View Dependent Claims (11, 12, 13)
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14. An LED light assembly emitting a variable light emission pattern with no moving parts, comprising:
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a beam-forming optic having a focus; a plurality of light emitting dies including a center die having an optical axis AO passing through said focus so that light from said center die is emitted from said optic as a collimated beam, and a plurality of peripheral dies surrounding said center die, each said peripheral die having an optical axis offset from optical axis AO so that light from said peripheral dies is emitted from said optic in a divergent emission pattern radially outward of said collimated beam; a controller operatively connected to said center die and said peripheral dies to vary power delivered to said center die independently of power delivered to said peripheral dies, wherein power is applied to said center die and said peripheral dies in a continuous or intermittent pattern alternating between said center die and said peripheral dies to generate a light emission pattern which varies between a collimated beam and divergent beam. - View Dependent Claims (15, 16, 17)
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Specification