Remote phosphor light engines and lamps
First Claim
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1. A light engine comprising:
- a pillar with first and second ends;
a circuit board on the first end of the pillar;
a light source mounted on the circuit board encircling the pillar and facing towards the second end of the pillar, said light source facing towards the second end of the pillar being the only light source on said pillar; and
a surface extending from the second end of the pillar, said surface and the exterior of the pillar between said surface and said circuit board being coated with a reflective remote phosphor that is excited by light from said light source;
wherein said surface comprises;
an inner slanted surface extending from the second end of the pillar radially outward and axially in the direction from the first end of the pillar towards the second end of the pillar; and
an outer slanted surface extending from an outer edge of the inner slanted surface radially outward and axially in the direction from the first end of the pillar towards the second end of the pillar at a flatter angle than the inner slanted surface.
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Abstract
A light engine has a pillar with first and second ends; a circuit board on the first end of the pillar, a light source mounted on the circuit board encircling the pillar and facing towards the second end of the pillar, and a surface extending from the second end of the pillar, that surface and the exterior of the pillar between that surface and the circuit board being coated with a reflective remote phosphor that is excited by light from the light source. The light engine may be used in a light bulb, with a frosted globe enclosing the circuit board and mounted round the outer edge of the phosphor-coated surface, and an Edison screw or other standard base connected to the second end of the pillar.
25 Citations
17 Claims
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1. A light engine comprising:
- a pillar with first and second ends;
a circuit board on the first end of the pillar;
a light source mounted on the circuit board encircling the pillar and facing towards the second end of the pillar, said light source facing towards the second end of the pillar being the only light source on said pillar; and
a surface extending from the second end of the pillar, said surface and the exterior of the pillar between said surface and said circuit board being coated with a reflective remote phosphor that is excited by light from said light source;wherein said surface comprises; an inner slanted surface extending from the second end of the pillar radially outward and axially in the direction from the first end of the pillar towards the second end of the pillar; and an outer slanted surface extending from an outer edge of the inner slanted surface radially outward and axially in the direction from the first end of the pillar towards the second end of the pillar at a flatter angle than the inner slanted surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a pillar with first and second ends;
Specification