LED lamp

Patent metadata

Field	Value
Publication number	US-10794544-B2
Application number	US-201815989160-A
Country	US
Kind code	B2
Filing date	May 24, 2018
Priority date	Jun 14, 2017
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A LED lamp comprises a base, an envelope, a printed circuit board for mounting a plurality of LED chips and a supporting member for supporting the printed circuit board. The envelope has a bottom end coupled with the base. The envelope defines an interior between the base and the envelope, and the printed circuit board is disposed in the interior. The printed circuit board comprises a hollow structure. One end of the supporting member is assembled in the base, the other end of the supporting member is coupled with the printed circuit board. One end of the printed circuit board extends into the base.

First claim

The invention claimed is:

1. A LED lamp, comprising:
a heat dissipating base;
an envelope with a bottom end coupled with the base, the envelope defining an interior between the base and the envelope;
a printed circuit board which is disposed in the interior, the printed circuit board being suitable for mounting a plurality of LED chips wherein:
the printed circuit board comprises a unitary sheet of flexible material which is shaped along a long axis into a linearly-extended, annular hollow structure comprising a plurality of flat, rectangular sides with a first end extended into the base, and
a mounting surface area of the printed circuit board is configured with a mounting area for the LED chips which is determined to dissipate the heat from the LED chips;

a thermally conductive supporting member which mechanically and thermally couples the first end of the printed circuit board with the base; and
the plurality of LED chips which are mounted on the printed circuit board in a plurality of columns distributed along the flat, rectangular sides, each column having two or more LED chips, wherein the plurality of LED chips are distributed substantially evenly both around an annular aspect and along the long axis of the printed circuit board;
wherein the annular unitary printed circuit board, the mounting area of the printed circuit board, the thermally conductive supporting member, the distribution of the LED chips, and the heat dissipating base provide for heat conduction from the LED lamp via the base, and
the printed circuit board, heat dissipating base, and thermally conductive supporting member function together to dissipate heat: (i) in lieu of a dedicated heat sink positioned on the printed circuit board and proximate to the LED chips;

and (ii) in lieu of an interior heat conducting gas.

2. The LED lamp of claim 1 , wherein the base defines an internal thread, and the supporting member defines a corresponding thread structure for mating and for efficient thermal transfer with the internal thread of the base.

3. The LED lamp of claim 1 , further comprising a driver circuit integrated on the printed circuit board, wherein:
the driver circuit is placed on the printed circuit board with a placement in relation to the plurality of LED chips, and the surface area of the printed circuit board is so sized, that the printed circuit board dissipates (i) a heat of the driver circuit and (ii) the combined heat generated by the plurality of LED chips, without the dedicated heat sink and without the interior heat conducting gas.

4. The LED lamp of claim 1 , wherein the supporting member comprises a base element, a supporting element extending upwardly from one end of the base element, and a pair of latch elements at two sides of the supporting element and extending in the same direction as the supporting element.

5. The LED lamp of claim 4 , wherein the printed circuit board is retained between the supporting element and the latch elements of the supporting member, and the printed circuit board defines a pair of holes for matching with the latch elements of the supporting member.

6. The LED lamp of claim 1 , wherein the supporting member comprises a base element, a floor element within the base element, at least one pair of holding elements extending upwardly from a top end of the floor element, at least one pair of guiding elements corresponding to the holding elements and extending downwardly from a bottom end of the floor element, and the printed circuit board comprises a plurality of projection elements extending from a bottom end of the printed circuit board.

7. The LED lamp of claim 6 , further comprising a plurality of position holes corresponding to the plurality of projection elements of the printed circuit board and separately provided on the floor element of the supporting member.

8. The LED lamp of claim 6 , wherein the at least one pair of holding elements comprise two pairs of internal holding elements positioned at a radially inner element of the floor element and two pairs of external holding elements positioned at a radially outer element of the floor element, a protrusion is defined between two adjacent internal holding elements in each pair, a driver circuit board is fixed in the guiding elements and the internal holding elements, and the driver circuit board comprises a slot corresponding to the protrusion of the supporting member.

9. The LED lamp of claim 1 , wherein the supporting member comprises a mounting slot having a shape matching the printed circuit board and configured to accommodate and fix the printed circuit board.

10. The LED lamp of claim 1 , wherein the supporting member comprises at least one of a thermally conductive polymer, a thermally conductive plastic, a thermally conductive resin, and a silica gel.

11. The LED lamp of claim 1 , wherein the annular hollow structure forming the printed circuit board further comprises a second end which is open and unobstructed.

12. A LED lamp, comprising:
a base;
an envelope with a bottom end coupled with the base, the envelope defining an interior between the base and the envelope;
a printed circuit board which is disposed in the interior, the printed circuit board comprising a hollow structure, the printed circuit board suitable for conducting heat;
a supporting member with a first end of the supporting member assembled in the base, a second end of the supporting member being coupled with the printed circuit board wherein the second end of the printed circuit board extends into the base; and
a plurality of LED chips so mounted and arranged on the printed circuit board such that the printed circuit board dissipates the heat generated from the plurality of LED chips;
wherein:
the supporting member comprises a base element, a floor element within the base element, at least one pair of holding elements extending upwardly from a top end of the floor element, at least one pair of guiding elements corresponding to the holding elements and extending downwardly from a bottom end of the floor element, and the printed circuit board comprises a plurality of projection elements extending from a bottom end of the printed circuit board; and
the at least one pair of holding elements comprise two pairs of internal holding elements positioned at a radially inner element of the floor element and two pairs of external holding elements positioned at a radially outer element of the floor element, a protrusion is defined between two adjacent internal holding elements in each pair, a driver circuit board is fixed in the guiding elements and the internal holding elements, and the driver circuit board comprises a slot corresponding to the protrusion of the supporting member.

13. The LED lamp of claim 12 , wherein the supporting member is thermally conductive;
wherein the printed circuit board, the heat dissipating base, and the thermally conductive supporting member function together to dissipate heat: (i) in lieu of a dedicated heat sink positioned on the printed circuit board and proximate to the LED chips; and (ii) in lieu of an interior heat conducting gas.

14. The LED lamp of claim 12 , wherein a second end of the printed circuit board is an open and unobstructed end which is oriented towards a spherical top element of the envelope.

15. A LED lamp comprising:
a heat dissipating base;
an envelope with a bottom end coupled with the base, the envelope defining an interior between the base and the envelope;
a printed circuit board disposed in the interior and comprising a flexible material shaped into a linearly-extended, annular hollow structure with a fir

Assignees

• Ge Lighting Solutions Llc
• Consumer Lighting Us Llc

Inventors

• Ren Xiaojun
• Xiao Kun
• Bao Zhifeng
• Wang Zhiyong
• Zhu Yimin

Classifications

• F21V23/005

  the substrate is supporting also the light source · CPC title

• F21V19/004

  by deformation of parts or snap action mountings, e.g. using clips · 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

• F21Y2107/30

  on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section · CPC title

• F21V29/85

  characterised by the material (liquid coolants F21V29/56) · CPC title