LED based lighting system

Patent metadata

Field	Value
Publication number	US-9488767-B2
Application number	US-201414451623-A
Country	US
Kind code	B2
Filing date	Aug 5, 2014
Priority date	Aug 5, 2014
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

An LED lighting system includes an LED assembly for emitting light when energized through an electrical path. An optic element in the enclosure receives the light emitted by the LED assembly and disperses the light from the enclosure. The optic element comprises a light guide for transmitting light from the LED assembly to a light emitting portion where the light emitting portion is configured to visually appear like a filament in a traditional bulb.

First claim

The invention claimed is:

1. An LED lighting system comprising;
an enclosure;
a base connected to the enclosure;
an LED assembly for emitting light when energized through an electrical path from the base;
an optic element in the enclosure for receiving the light emitted by the LED assembly, the optic element comprising a first portion for transmitting light from the LED assembly to a light emitting portion without emitting visible light where the light emitting portion is located remote from the LED assembly and emits visible light from the optic element, the light emitting portion being configured to visually appear like a filament in a traditional bulb.

2. The LED lighting system of claim 1 wherein the base comprises an Edison base.

3. The LED lighting system of claim 1 wherein the light emitting portion comprises surface treatment on the optic element.

4. The LED lighting system of claim 3 wherein the surface treatment comprises surface indentations formed on the optic element.

5. The LED lighting system of claim 1 wherein the light emitting portion is configured to visually appear like one of a cage, a coil, a loop, and an inverted U filament.

6. The LED lighting system of claim 1 wherein the optic element is transparent.

7. The LED lighting system of claim 1 wherein the light emitting potion comprises a light diffusive surface.

8. The LED lighting system of claim 1 further comprising a switch for lowering current delivered to the LED assembly, the color of the light changing to red/orange/red-orange in response to the lowering of the current.

9. An LED lighting system comprising;
a base;
an LED assembly for emitting light when energized through an electrical path from the base;
an optic element connected to the base for receiving the light emitted by the LED assembly, the optic element comprising an exterior surface and an internal passage defining an internal non-light guide transmitting light from the LED assembly to a light emitting portion where the internal light guide is configured like a filament in a traditional bulb, the exterior surface of the optic element being exposed wherein the exterior surface of the optic element is configured like a traditional bulb.

10. The LED lighting system of claim 9 wherein the exterior surface of the optic element forms the light exit surface of the lamp.

11. The LED lighting system of claim 9 wherein the light emitting portion comprises a surface treatment formed in the internal passage.

12. An LED lighting system comprising;
an enclosure;
a base connected to the enclosure;
an LED assembly for emitting light when energized through an electrical path from the base;

an optic element in the enclosure for receiving the light emitted by the LED assembly, the optic element comprising a first portion for transmitting light from the LED assembly to a light emitting portion where the light emitting portion is located remote from the LED assembly and comprises a surface treatment that diffuses and emits light from the optic element in the light emitting portion, the light emitting portion being configured to visually appear like a filament in a traditional bulb.

Assignees

• Cree Inc

Inventors

• Nava Dante P
• Galberth Calvin

Classifications

• F21K9/232

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title

• G02B6/0096 Primary

  the lights guides being of the hollow type · CPC title

• G02B6/001

  the light being emitted along at least a portion of the lateral surface of the fibre · CPC title

• F21V3/00

  Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) · CPC title

• F21K9/61

  using light guides · CPC title