Led lamp

Patent metadata

Field	Value
Publication number	US-2016356428-A1
Application number	US-201514733241-A
Country	US
Kind code	A1
Filing date	Jun 8, 2015
Priority date	Jun 8, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A lamp includes an optically transmissive enclosure and a base connected to the enclosure. A LED board is positioned in the enclosure and has a first side and a second side. A first LED array is mounted on the first side and a second LED array is mounted on the second side where the LED arrays are operable to emit light when energized through an electrical path from the base. A first diffusive lens and a second diffusive lens are located inside of and spaced from the enclosure. The first diffusive lens receives light emitted from the first LED array and the second diffusive lens receives light emitted from the second LED array.

First claim

1 . A lamp comprising:
an optically transmissive enclosure defining an interior space; a base connected to the enclosure; a LED board positioned in the interior space and defining a first side and a second side; a first LED mounted on the first side and a second LED mounted on the second side operable to emit light when energized through an electrical path from the base; a first diffusive lens and a second diffusive lens located inside of and spaced from the enclosure, the first diffusive lens receiving light emitted from the first LED and the second diffusive lens receiving light emitted from the second LED.

2 . The lamp of claim 1 wherein the LED board is thermally dissipative.

3 . The lamp of claim 2 wherein the LED board is electrically conductive.

4 . The lamp of claim 2 wherein the LED board comprises a PCB FR4 board.

5 . The lamp of claim 2 wherein the LED board comprises a metal core printed circuit board.

6 . The lamp of claim 3 wherein the LED board forms a part of the electrical path.

7 . The lamp of claim 2 wherein the LED board dissipates heat from the first LED and the second LED without a heat sink.

8 . The lamp of claim 1 wherein the LED board comprises an electrical circuit mounted on a substrate.

9 . The lamp of claim 8 wherein the substrate is not in the electrical path.

10 . The lamp of claim 14 wherein the electrical circuit comprises at least one of a flex circuit and a lead frame and the substrate comprises at least one of glass and metal.

11 . The lamp of claim 1 wherein the enclosure comprises apertures that allow air to flow into, through and out of the enclosure.

12 . The lamp of claim 11 wherein a first aperture is provided proximate to the base and a second aperture is provided proximate to a distal end of the lamp such that air flows through the enclosure along a longitudinal axis of the lamp.

13 . The lamp of claim 12 wherein the first diffusive lens and the second diffusive lens comprise vent openings that allow air to flow into the space bounded by the first diffusive lens and the second diffusive lens

14 . The lamp of claim 1 wherein the LED board comprises a planar rigid member.

15 . The lamp of claim 14 wherein the first diffusive lens and the second diffusive lens are mounted to the LED board.

16 . The lamp of claim 1 wherein the first diffusive lens and the second diffusive lens provide a diffuse scattering layer that produces a more uniform far field pattern.

17 . The lamp of claim 1 wherein the first diffusive lens and the second diffusive lens form part of a single lens assembly having a U-shaped support that is disposed over an edge of the LED board.

18 . The lamp of claim 1 wherein the first diffusive lens and the second diffusive lens are connected at a living hinge.

19 . The lamp of claim 1 wherein the first diffusive lens and the second diffusive lens are connected to the LED board by a snap-fit connection.

20 . The lamp of claim 1 wherein the snap-fit connection comprises a deformable male engagement member that engages a mating female engagement member.

21 . A lamp comprising:
an optically transmissive enclosure defining an interior space; a base connected to the enclosure; a LED board positioned in the interior space; a plurality of LEDs mounted on the LED board operable to emit light when energized through an electrical path from the base; a diffusive lens located inside of and spaced from the enclosure, the diffusive lens receiving light emitted from the plurality of LEDs.

22 . The lamp of claim 21 wherein the optically transmissive enclosure has a first end connected to the base and a second end to define a longitudinal axis extending from the base toward the second end;
the LED board extends parallel to the longitudinal axis.

Assignees

• Cree Inc

Inventors

• Edmond Mark
• Tiwari Nishant

Classifications

• F21V29/83

  the elements having apertures, ducts or channels, e.g. heat radiation holes · CPC title

• F21V29/504

  of refractors · CPC title

• H05K1/00

  Printed circuits · CPC title

• F21V3/02 Primary

  characterised by the shape · CPC title

• F21K9/235

  Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps (F21K9/238 takes precedence) · CPC title