SSL lamp for replacing gas discharge lamp

Patent metadata

Field	Value
Publication number	US-11022258-B2
Application number	US-201716462285-A
Country	US
Kind code	B2
Filing date	Nov 23, 2017
Priority date	Nov 25, 2016
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A solid state lighting lamp (10) for replacing a gas discharge lamp (1) having a light emission area (3) with a given light center length (A) and a given light emission area length (B) is disclosed. The solid state lighting lamp comprises a base portion (11) including a connector (12); an upper portion (13) opposite said base portion; and a plurality of linear arrays of solid state lighting sources (17) mounted on a body (21) and extending in parallel with a central axis (30) of the lamp, each linear array having a central point within 10% tolerance of the given light center length from the connector, wherein, for each linear array: an upper solid state lighting source (17a) lies on an upper virtual conical surface (30) extending from a point of said central axis coinciding with an upper edge of the light emission area under a first internal angle (α) between said central axis and the upper virtual conical surface in a range 40-85°; and a lower solid state lighting source (17b) lies on a lower virtual conical surface (40) extending from a further point of said central axis coinciding with a lower edge of the light emission area under a second internal angle (β) between said central axis and the lower virtual conical surface in a range 40-85°. A luminaire comprising such a solid state lighting lamp is also disclosed.

First claim

The invention claimed is:

1. A solid state lighting lamp for replacing a gas discharge lamp having a light emission area with a given light center length (A) and a given light emission area length (B), the solid state lighting lamp comprising:
a base portion including a connector;
an upper portion opposite said base portion; and
a plurality of linear arrays of solid state lighting sources mounted on a body and extending in parallel with a central axis of the lamp, each linear array having a central point within 10% tolerance of the given light center length (A) from the connector, wherein, for each linear array:
an upper solid state lighting source lies on an upper virtual conical surface extending from a point of said central axis coinciding with an upper edge of the light emission area under a first internal angle (α) between said central axis and the upper virtual conical surface in a range 40-85°; and
a lower solid state lighting source lies on a lower virtual conical surface extending from a further point of said central axis coinciding with a lower edge of the light emission area under a second internal angle (β) between said central axis and the lower virtual conical surface in a range 40-85°;
wherein the distance between the point and the further point of said central axis is the given light emission area length (B).

2. The solid state lighting lamp of claim 1 , wherein the first internal angle (α) and the second internal angle (β) are individually selected from a range of 77-83°.

3. The solid state lighting lamp of claim 1 , wherein the first internal angle (α) and the second internal angle (β) are the same.

4. The solid state lighting lamp of claim 1 , wherein each linear array has a central point within 5% tolerance of the given light center length (A) from the connector.

5. The solid state lighting lamp of claim 1 , wherein each linear array has a length exceeding the given light emission area length by at least 30%.

6. The solid state lighting lamp of claim 1 , wherein the body is formed of separate optical modules, each carrying one of said linear arrays.

7. The solid state lighting lamp of claim 1 , wherein the body is made of a thermally conductive material and arranged to act as a heat sink for the solid state lighting sources.

8. The solid state lighting lamp of claim 7 , wherein the thermally conductive material is aluminium.

9. The solid state lighting lamp of claim 1 , wherein the body delimits an inner volume of the solid state lighting lamp, said inner volume comprising a driver circuit for the solid state lighting sources.

10. The solid state lighting lamp of claim 1 , wherein the body comprises a plurality of channels, each linear array of solid state lighting sources being mounted in one of said channels.

11. A luminaire for use with a gas discharge lamp having a given light center length (A) and a given light emission area length (B), the luminaire comprising:
a chamber delimited by an upper surface and a lower surface, and
the solid state lighting lamp of claim 1 as a replacement of the gas discharge lamp.

12. The luminaire of claim 11 , wherein the chamber is further delimited by a housing having a smooth central region centered around said light center.

13. The luminaire of claim 12 , wherein the smooth central region is transparent or translucent.

14. The luminaire of claim 12 , the housing further comprising:
an upper region in between the smooth central region and the upper surface, the upper region comprising a first plurality of prisms for shaping incident light of the solid state lighting lamp; and
a lower region in between the smooth central region and the lower surface, the lower region comprising a second plurality of prisms for shaping incident light of the solid state lighting lamp.

15. The luminaire of claim 11 , wherein at least one of the upper surface and the lower surface comprises a reflector.

Assignees

• Signify Holding Bv

Inventors

• Deng Lan
• Wang Li

Classifications

• F21K9/232 Primary

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

• F21K9/65 Primary

  specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts · 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

• F21K9/90

  Methods of manufacture · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title