LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties
First Claim
1. A solid state lamp, comprising:
- a light emitting diode (LED) based light source;
a remote wavelength conversion material carrier spaced from said LED light source;
a diffuser distinct from said remote wavelength conversion material carrier wherein said diffuser comprises a geometry and light scattering properties configured to disperse the light from said LED light source and wavelength conversion material carrier in a substantially omnidirectional emission pattern, wherein said diffuser geometry comprises a neck at its base, wherein at least a portion of said remote wavelength conversion material carrier is at the base of said diffuser;
wherein said conversion material carrier comprises a carrier layer and a phosphor layer.
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Accused Products
Abstract
An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor carrier having a conversions material and arranged over an opening to the cavity. The phosphor carrier comprises a thermally conductive transparent material and is thermally coupled to the heat sink structure. An LED based light source is mounted in the optical cavity remote to the phosphor carrier with light from the light source passing through the phosphor carrier. A diffuser dome is included that is mounted over the optical cavity, with light from the optical cavity passing through the diffuser dome. The properties of the diffuser, such as geometry, scattering properties of the scattering layer, surface roughness or smoothness, and spatial distribution of the scattering layer properties may be used to control various lamp properties such as color uniformity and light intensity distribution as a function of viewing angle.
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Citations
58 Claims
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1. A solid state lamp, comprising:
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a light emitting diode (LED) based light source; a remote wavelength conversion material carrier spaced from said LED light source; a diffuser distinct from said remote wavelength conversion material carrier wherein said diffuser comprises a geometry and light scattering properties configured to disperse the light from said LED light source and wavelength conversion material carrier in a substantially omnidirectional emission pattern, wherein said diffuser geometry comprises a neck at its base, wherein at least a portion of said remote wavelength conversion material carrier is at the base of said diffuser; wherein said conversion material carrier comprises a carrier layer and a phosphor layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 46, 47, 48, 54, 55, 56, 57)
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11. A solid state lamp, comprising:
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a forward emitting light emitting diode (LED) based light source; a substantially flat remote phosphor carrier spaced from said LED light source; a diffuser distinct from said remote phosphor carrier, said diffuser comprising a scattering material and comprising a geometry configured to disperse light from said LED light source and said phosphor carrier in a substantially uniform lamp emission pattern of light, wherein said diffuser geometry comprises a neck at its base, wherein at least a portion of said phosphor carrier is at the base of said diffuser. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 49, 50, 51, 58)
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30. A solid state lamp, comprising:
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a light emitting diode (LED) based light source; a three dimensional remote phosphor carrier comprising a neck and spaced from said LED light source; a three dimensional diffuser distinct from said remote phosphor carrier and having a shape and varying scattering properties configured such that light emitted from the diffuser has reduced variation in spatial emission intensity profile over an angular range compared to the light emitted from the remote phosphor carrier, wherein said diffuser comprises a neck, wherein at least a portion of said remote phosphor carrier is at the base of said diffuser. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 52, 53)
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Specification