LED light bulb

• US 9,702,510 B2
• Filed: 05/23/2014
• Issued: 07/11/2017
• Est. Priority Date: 05/24/2013
• Status: Active Grant

• Current Assignee: In 2 Developments LLC
• Original Assignee: YJB Led Incorporated
• Inventors: Anderson, Deloren E.
• Primary Examiner(s): Green, Tracie Y
• Application Number:
  US14/286,586
• Publication Number:
  US 20150085489A1
• Time in Patent Office: 1,145 Days
• CPC Class Codes: F21K 9/23 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 Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light bulb includes an Edison style base, light emitting diode circuitry coupled to the base, a bulb sealed about the base and extending above the base, an elongated filament substrate supported by the base and extending into the bulb above the base, a light emitting diode channel supported by the filament substrate, coupled to the light emitting diode circuitry, and extending into the bulb above the base, and an inert gas disposed within the bulb.

Claims

1. A light bulb comprising:

an Edison style base;

light emitting diode circuitry coupled to the base;

a conductive structure including a first proximal contact that is proximate the base and a first distal contact that is distal from the base;

a bulb sealed about the base and extending above the base;

a substantially cylindrical elongated filament supported on a first proximate filament end by the first proximate contact and supported on a first distal filament end by the first distal contact, the filament extending from the base into the bulb above the base, wherein the bulb entirely encases the elongated filament;

a light emitting diode channel disposed within the filament, coupled to the light emitting diode circuitry, and extending into the bulb above the base; and

an inert gas disposed within the bulb.

2. The light bulb of claim 1 wherein the inert gas comprises argon.

3. The light bulb of claim 1 wherein the filament includes a filament substrate formed of ceramic.

4. The light bulb of claim 3 wherein the filament substrate has a rectangular cross section with each of two opposite sides supporting a respective light emitting diode channel.

5. The light bulb of claim 1 further including a second filament, the second filament including a second light emitting diode channel shaped in an elongated strip disposed within the second filament;

wherein;

the conductive structure includes a second proximal contact that is proximate the base and separated from the first proximate contact;

the second filament is supported on a second proximate filament end by the second proximate contact; and

the second filament is supported on a second distal filament end by the first distal contact, the first filament and second filament converging on the first distal contact.

6. The light of claim 1 wherein the filament is formed of a substantially transparent material.

7. The light bulb of claim 6 wherein the transparent material is glass.

8. The light bulb of claim 6 wherein the filament includes a first filament conductor and a second filament conductor to contact the light emitting diode channel, the filament tapered on the first filament end to the first filament conductor and tapered on the second filament end to the second filament conductor.

9. The light bulb of claim 5, further including a third filament and a fourth filament, the first, second, third, and fourth filaments supported by the conductive structure and coupled to the light emitting diode circuitry, wherein:

the conductive structure includes a second distal contact that is distal from the base and separated from the first distal contact;

the third filament is supported by the second proximal contact and the second distal contact; and

the fourth filament is supported by the second distal contact and the first proximal contact, the third filament and fourth filament converging on the second distal contact.

10. The light bulb of claim 3 wherein the filament substrate has a first side and a second side opposite the first side, and wherein each side supports a light emitting diode channel, each channel having multiple light emitting diodes positioned in a staggered manner with respect to the light emitting diodes in the other channel to facilitate light transmission from each diode away from both sides of the filament substrate.

11. The light bulb of claim 1, further including a light emitting diode circuitry substrate, wherein the light emitting diode circuitry is disposed on the light emitting diode circuitry substrate.

12. The light bulb of claim 11, wherein the light emitting diode circuitry substrate is shaped like a doughnut and arranged around the filament substrate.

13. The light bulb of claim 11 wherein the light emitting diode circuitry substrate is substantially transparent.

14. The light bulb of claim 11, wherein the light emitting diode circuitry substrate is disposed within the base.

15. The light bulb of claim 14, wherein the light emitting diode circuitry substrate is supported by the base and extends into the bulb above the base.

16. A light bulb comprising:

an Edison style base;

light emitting diode circuitry coupled to the base;

a conductive structure including a first proximal contact that is proximate the base and a first distal contact that is distal from the base;

a bulb sealed about the base and extending above the base;

a substantially cylindrical elongated filament supported on a first proximate filament end by the first proximate contact and supported on a first distal filament end by the first distal contact, the filament extending from the base into the bulb above the base, wherein the bulb entirely encases the elongated filament; and

a light emitting diode channel disposed within the filament, coupled to the light emitting diode circuitry, and extending into the bulb above the base.

17. The light bulb of claim 16 wherein the filament is formed of a transparent material.

18. The light bulb of claim 16 wherein the filament is formed of porous glass.

19. A light bulb comprising:

an Edison style base;

a bulb sealed about the base and extending above the base;

a conductive structure including a first proximal contact that is proximate the base and a first distal contact that is distal from the base;

a substantially cylindrical elongated filament supported on a first proximate filament end by the first proximate contact and supported on a first distal filament end by the first distal contact, the filament extending from the base into the bulb above the base, wherein the bulb entirely encases the elongated filament;

a light emitting diode channel including light emitting diodes disposed within the filament and extending into the bulb above the base; and

an inert gas disposed within the bulb.

20. The light bulb of claim 19 wherein the filament is formed of porous glass.