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US 7,810,963 B2Granted
Light emitting diode module with improved light distribution uniformity
AssigneeDialight Corporation
InventorJohn Patrick Peck
Life of this patent
Estimating the term…
Abstract
In one embodiment, the invention is a light emitting diode module with improved light distribution uniformity. One embodiment of a signal head includes a light emitting diode and a reflector cup positioned to reflect light emitted by the light emitting diode, the reflector cup having a non-symmetrical curvature.
Claims20
A reflector optic for reflecting light emitted by an array of light-emitting diodes comprising, each light-emitting diode in the array of light-emitting diodes having a peak intensity directed along a center axis,
- a reflective surface;
- and
- a plurality of reflector cups separately formed in a common plane of the reflective surface, at least some of the reflector cups having a non-symmetrical curvature designed to direct light emitted by respective light-emitting diodes such that the peak intensity is shifted away from the center axis, wherein at least two of the at least some of the reflector cups are shaped and positioned to direct light from respective light emitting diodes in different directions away from the center axis.
A signal head, comprising:
- an array of light emitting diodes positioned in a common plane, each light emitting diode in the array of light emitting diodes having a peak intensity directed along a center axis;
- and
- an array of reflector cups separately positioned in the common plane and positioned to reflect light emitted by the array of light emitting diodes, at least some of the reflector cups having a non-symmetrical curvature, such that the at least some of the reflector cups reflect light from respective light emitting diodes such that the peak intensity is shifted away from the center axis, wherein at least two of the at least some of the reflector cups are shaped and positioned to direct light from respective light emitting diodes in different directions away from the center axis.
A method for illuminating a signal head, the method comprising:
- providing light via an array of light emitting diodes positioned in a common plane, each light emitting diode in the array of light emitting diodes having a peak intensity directed along a center axis;
- and
- reflecting light emitted by the array of light emitting diodes using an array of reflector cups separately positioned in the common plane, at least some of the reflector cups in the array of reflector cups having a non-symmetrical curvature, such that the at least some of the reflector cups reflect light from respective light emitting diodes such that the peak intensity is shifted away from the center axis, wherein at least two of the at least some reflector cups are shaped and positioned to direct light from respective light emitting diodes in different directions away from the center axis.
Dependencies are inferred from the claim text.