Led lamp with uniform omnidirectional light intensity output

Patent metadata

Field	Value
Publication number	US-2016356431-A1
Application number	US-201615158978-A
Country	US
Kind code	A1
Filing date	May 19, 2016
Priority date	Oct 2, 2009
Publication date	Dec 8, 2016
Grant date	—

Abstract

A light emitting apparatus comprises: an LED-based light source; a spherical, spheroidal, or toroidal diffuser generating a Lambertian light intensity distribution output at any point on the diffuser surface responsive to illumination inside the diffuser; and a base including a base connector. The LED based light source, the diffuser, and the base are secured together as a unitary LED lamp installable in a lighting socket by connecting the base connector with the lighting socket. The diffuser is shaped and arranged respective to the LED based light source in the unitary LED lamp to conform with an isolux surface of the LED based light source. The base is operatively connected with the LED based light source in the unitary LED lamp to electrically power the LED based light source using electrical power received at the base connector.

First claim

1 - 42 . (canceled)

43 . A light emitting apparatus comprising:
an LED-based light source; a phosphor containing spheroidal diffuser generating a light intensity distribution output responsive to illumination inside the diffuser; and a base including a base connector, said base having sidewalls angling outward adjacent said diffuser; the LED-based light source, the diffuser, and the base being secured together as a unitary LED lamp installable in a lighting socket by connecting the base connector with the lighting socket; and the base being operatively connected with the LED-based light source in the unitary LED lamp to electrically power the LED-based light source using electrical power received at the base connector.

44 . The light emitting apparatus of claim 43 wherein the LED-based light source is arranged tangentially to a base portion of the diffuser.

45 . The light emitting apparatus of claim 43 wherein said diffuser comprises an oblate spheroidal shape.

46 . The light emitting apparatus of claim 43 wherein said diffuser includes a first section adjacent the base having a first theoretical generally spheroidal shape and a second section remote from the base having a second theoretical generally spheroidal shape different from the first.

47 . A wavelength-converting component comprising:
a light transmissive hollow component defining an interior volume and having a substantially circular cross section, a substantially circular opening and at least one wavelength-converting material which generates light in response to excitation light, wherein the component includes:
(i) a first portion arranged proximate to the opening having an increasing lateral dimension moving away from the opening, and
(ii) a second portion arranged distal from the opening having a decreasing lateral dimension moving away from the opening, and
(iii) a location along the periphery of the component at which the maximum lateral dimension of the first and second portions are the same.

48 . The wavelength-converting component of claim 47 wherein the wavelength-converting material is a phosphor.

49 . The wavelength-converting component of claim 47 wherein the first portion has prolate shape, and the second portion has an oblate shape.

50 . The wavelength-converting component of claim 47 wherein the first portion of the light transmissive hollow component has a length X along an axis of rotational symmetry and the second portion of the light transmissive hollow component has a length Y along the axis of rotational symmetry, wherein X>Y.

51 . The wavelength-converting component of claim 50 wherein X≧1.5Y.

52 . The wavelength-converting component of claim 50 wherein X≧2Y.

53 . The wavelength-converting component of claim 50 wherein X≧3Y.

54 . The wavelength-converting component of claim 47 wherein the phosphor is a diffusing phosphor.

55 . The wavelength-converting component of claim 47 wherein the wavelength-converting material comprises a diffuser.

56 . The wavelength-converting component of claim 49 wherein the first portion has a shape of a truncated prolate semi-ellipsoid, and the second portion has a shape of an oblate semi-ellipsoid.

57 . A solid-state lamp comprising the wavelength-converting component of claim 51 .

58 . The solid-state lamp of claim 57 further comprising one or more LED devices wherein the wavelength-converting component is remote to the one or more LED devices.

Assignees

• Allen Gary R
• Dudik David C
• Kolodin Boris
• Rintamaki Joshua I
• Roberts Bruce R
• Ge Lighting Solutions Llc

Inventors

• Allen Gary R
• Dudik David C
• Kolodin Boris
• Rintamaki Joshua I
• Roberts Bruce R

Classifications

• F21V9/32

  characterised by the arrangement of the photoluminescent material · CPC title

• F21K9/23

  Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings · CPC title

• F21K9/238

  Arrangement or mounting of circuit elements integrated in the light source · CPC title

• F21K9/66

  Details of globes or covers forming part of the light source · CPC title

• F21V19/0075

  of tubular light sources, e.g. ring-shaped fluorescent light sources · CPC title