LED bulb with back-reflecting optic
First Claim
1. A solid-state bulb comprisinga base;
- an optically transmissive enclosure on the base;
a plurality of LEDs on a mounting surface of the base; and
a total-internal-reflection (TIR) optic at least partially in an optical path from the plurality of LEDs to a central area of the optically transmissive enclosure, the optic comprising a curved surface to reflect at least a first portion of the light from the plurality of LEDs toward the base and a through hole that extends through the TIR optic that receives a second portion of the light from the plurality of LEDs whereby the solid-state bulb produces an omnidirectional distribution of light.
3 Assignments
0 Petitions
Accused Products
Abstract
An LED bulb with a down-reflecting optic is disclosed. Embodiments of the present invention can provide for an omnidirectional intensity distribution in the vertical plane for a vertically oriented solid-state lamp. In example embodiments, an optically transmissive enclosure is installed on the driver base. A plurality of LEDs are mounted on a mounting surface of the driver base, and an optical arrangement is disposed at least partially in an optical path from the plurality of LEDs to a central area of the optically transmissive enclosure to down-reflect at least some light from the plurality of LEDs. The optical arrangement can include a TIR optic with a spline-driving surface to down-reflect the at least some light from the plurality of LEDs, or a substantially flat mirror. Either may include a central aperture, and the optical arrangement may include a diffuser or diffusive areas.
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Citations
21 Claims
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1. A solid-state bulb comprising
a base; -
an optically transmissive enclosure on the base; a plurality of LEDs on a mounting surface of the base; and a total-internal-reflection (TIR) optic at least partially in an optical path from the plurality of LEDs to a central area of the optically transmissive enclosure, the optic comprising a curved surface to reflect at least a first portion of the light from the plurality of LEDs toward the base and a through hole that extends through the TIR optic that receives a second portion of the light from the plurality of LEDs whereby the solid-state bulb produces an omnidirectional distribution of light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a solid-state bulb to produce an omnidirectional distribution of light, the method comprising:
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energizing a plurality of LEDs on a mounting surface of a base to emit light; using a curved surface of a total internal reflection (TIR) optic to reflect a first portion of the light from the plurality of LEDs toward the base; and allowing at least some of a second portion of the light from the plurality of LEDs into a central area of a light transmissive enclosure through a central through hole that extends through the TIR optic. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An LED bulb comprising:
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a base; an optically transmissive enclosure on the base defining a longitudinal axis of the lamp; a plurality of LEDs on a mounting surface of the base; and an optical arrangement at least partially in an optical path from the plurality of LEDs to a central area of the optically transmissive enclosure to reflect at least some light from the plurality of LEDs toward the base; wherein the optical arrangement further comprises; a substantially flat mirror to reflect at least a first portion of the light from the plurality of LEDs toward the base, the mirror extending substantially perpendicularly to the longitudinal axis of the lamp, the mirror defining a plurality of through holes that extend through the mirror that receive a second portion of the light from the plurality of LEDs. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A solid-state bulb comprising:
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a base; an optically transmissive enclosure on the base; a plurality of LEDs positioned to emit light in the enclosure; and an optic at least partially in an optical path from the plurality of LEDs, the optic comprising a total-internal-reflection (TIR) optic including a reflective surface that is positioned to reflect at least a first portion of the light from the plurality of LEDs toward the base, a plurality of support legs comprising a diffusive area resting on the base and at least one through hole that extends through the optic that receives a second portion of the light from the plurality of LEDs that passes through the optic without being reflected by the reflective surface whereby the solid-state bulb produces an omnidirectional distribution of light.
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Specification