Faceted multi-chip package to provide a beam of uniform white light from multiple monochrome LEDs
First Claim
1. A light source comprisingan array of light emitting diode components (LEDs) comprising at least one LED in each of a plurality of colors or emitting light in each of a plurality of colors and a reflector tube having an entrance aperture, an exit aperture, a reflector body portion having a reflective circumferential wall extending between said apertures, and an optic axis extending between said apertures centrally of said wall, said array of LED components being arranged in said entrance aperture, and said circumferential wall of the reflector body portion being arranged to reflect and mix light from said array of LED components, wherein at least a portion of the circumferential wall of the reflector body has a polygonal cross-section taken normal to the optic axis, and at least a portion of the cross-section taken parallel to the optic axis includes segments of a curve joined one to the next to form a plurality of facets for reflecting light from said LED components to said exit aperture.
5 Assignments
0 Petitions
Accused Products
Abstract
A light source includes an array of LED components in each of a plurality of colors such as red, green, and blue in the entrance aperture of a tubular reflector which has an exit aperture, an optic axis extending between the apertures, and a reflective circumferential wall extending between the apertures to reflect and mix light from the array of LED components. At least a portion of the circumferential wall of the reflector body has a polygonal cross-section taken normal to the optic axis, and at least a portion of the cross-section taken parallel to the optic axis includes segments of a curve joined one to the next to form a plurality of facets for reflecting light from the LED components to said exit aperture. Preferably, the segments of the curve included in the cross-section of the reflector body taken parallel to the optic axis are contiguous, linear trapezoidal facets.
-
Citations
24 Claims
-
1. A light source comprising
an array of light emitting diode components (LEDs) comprising at least one LED in each of a plurality of colors or emitting light in each of a plurality of colors and a reflector tube having an entrance aperture, an exit aperture, a reflector body portion having a reflective circumferential wall extending between said apertures, and an optic axis extending between said apertures centrally of said wall, said array of LED components being arranged in said entrance aperture, and said circumferential wall of the reflector body portion being arranged to reflect and mix light from said array of LED components, wherein at least a portion of the circumferential wall of the reflector body has a polygonal cross-section taken normal to the optic axis, and at least a portion of the cross-section taken parallel to the optic axis includes segments of a curve joined one to the next to form a plurality of facets for reflecting light from said LED components to said exit aperture.
-
9. A light source comprising
an array of light emitting diode chips (LED chips) provided in an entrance aperture of a tubular reflector which comprises an exit aperture, a reflector body portion having a reflective circumferential wall extending between said apertures centrally of the circumferential wall, and an optic axis extending between said apertures centrally of said wall, said circumferential wall being arranged to reflect and mix light from said array of LED chips, wherein at least a portion of the circumferential wall of the reflector body portion has a polygonal cross-section taken normal to the optic axis, and at least a portion of the cross-section taken parallel to the optic axis includes segments of a polygonal curve joined one to the next to form a plurality of contiguous, planar facets for reflecting light from said LED chips to said exit aperture.
-
19. A light source comprising
an array of light emitting diode chips (LED chips) provided in an entrance aperture of a tubular reflector which comprises an exit aperture, a reflector body portion having a reflective circumferential wall extending between said apertures centrally of the circumferential wall, and an optic axis extending between said apertures centrally of said wall, said circumferential wall being arranged to reflect and mix light from said array of LED chips, wherein at least a portion of the circumferential wall of the reflector body portion has a polygonal cross-section taken normal to the optic axis, and at least a portion of the cross-section taken parallel to the optic axis includes segments of a polygonal curve joined one to the next to form a plurality of contiguous, planar facets for reflecting light from said LED chips to said exit aperture, and wherein said reflector is a hollow tube-like structure filled at least partially with a transparent dielectric material.
Specification