LED lamp and lens unit therefor

Patent metadata

Field	Value
Publication number	US-9121554-B2
Application number	US-201313804102-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 16, 2012
Publication date	Sep 1, 2015
Grant date	Sep 1, 2015

Abstract

An LED lamp includes: a plurality of light source units, each of which includes one or more LED chips and an emission surface through which light from the LED chips is emitted; and a lens unit having a plurality of lenses, each of which is located in front of the emission surface of each of the plurality of light source units.

First claim

What is claimed is:

1. An LED lamp comprising:
a plurality of light source units, each of which includes one or more LED chips and an emission surface through which light from the LED chips is emitted;
a plurality of substrates, on each of which a predetermined number from the plurality of light source units is mounted; and
a lens unit having a plurality of lenses disposed in front of the emission surfaces of the plurality of light source units, and a plurality of partition regions, one lens of the plurality of lenses corresponding to one of the plurality of partition regions,
wherein adjacent lenses among the plurality of lenses are arranged so that no gap is provided between the adjacent lenses,
wherein the plurality of partition regions includes inner partition regions surrounded by outer partition regions, each of the inner partition regions having the lens formed in an entire surface of each of the inner partition regions, a size of each of the outer partition regions being larger than a size of each of the inner partition regions,
wherein a center of each of the inner partition regions coincides with a center of each of the lenses included in each of the inner partition regions, and
wherein each of the outer partition regions are arranged on a periphery of the lens unit, and a center of each of the outer partition regions is deviated outward from a center of the lens included in each of the outer partition regions.

2. The LED lamp of claim 1 , wherein the plurality of lenses is arranged in the form of a matrix.

3. The LED lamp of claim 1 , wherein the emission surface of each of the plurality of light source units is smaller than an area of each of the lenses.

4. The LED lamp of claim 1 , wherein each of the plurality of lenses is a Fresnel lens and the lens unit has a shape of plate.

5. The LED lamp of claim 1 , wherein each center of the plurality of light source units coincides with each center of the plurality of lenses.

6. The LED lamp of claim 5 , wherein the lens unit has a rectangular shape in its entirety.

7. The LED lamp of claim 6 , wherein each of the partition regions has a rectangular shape.

8. The LED lamp of claim 1 , wherein the plurality of lenses corresponding to the outer partition regions do not cover the entire surface of the outer partition regions.

9. The LED lamp of claim 1 , wherein each of the outer partition regions has the one lens of the plurality of lenses corresponding to one of the plurality of partition regions formed entirely each of the outer partition regions.

10. The LED lamp of claim 1 , wherein a distance between each of the lenses and each of the light source units is smaller than a focal length of each of the lenses.

11. The LED lamp of claim 1 , further comprising a plurality of light source substrates, each of which is mounted with a part of the plurality of light source units.

12. The LED lamp of claim 11 , wherein the one or more LED chips are directly mounted on the light source substrates.

13. The LED lamp of claim 12 , wherein each of the light source units has a fluorescent resin part covering the one or more LED chips and containing a fluorescent material emitting light having a wavelength different from that of the light from the one or more LED chips when the fluorescent material is excited by the light from the one or more LED chips.

14. The LED lamp of claim 13 , wherein each of the light source units has a rectangular shape.

15. The LED lamp of claim 14 , wherein each of the light source units has a plurality of LED chips arranged in the form of a matrix.

16. The LED lamp of claim 15 , wherein each of the plurality of light source substrates has an elongated rectangular shape and the plurality of light source substrates are arranged in parallel to each other at intervals.

17. The LED lamp of claim 12 , wherein the plurality of LED chips included in each of the light source units is connected in parallel, and the plurality of light source units mounted on each of the light source substrates is connected in series.

18. The LED lamp of claim 11 , further comprising a heat transfer plate to which the plurality of light source substrates is attached.

19. The LED lamp of claim 18 , further comprising a housing configured to support the heat transfer plate.

20. The LED lamp of claim 19 , wherein the housing has an attachment opening formed in an opposite side to the heat transfer plate to which the plurality of light source substrates is attached, and an attachment is attached to the attachment opening.

21. The LED lamp of claim 1 , further comprising a protective plate located in an opposite side to the plurality of light source units with respect to the lens units.

22. A lens unit for LED lamp, comprising a plurality of lenses arranged in the form of a matrix, each of which transmits and emits light from a light source unit.

23. The lens unit of claim 22 , wherein each of the lenses is a Fresnel lens and the lens unit has a shape of plate in its entirety.

24. The lens unit of claim 23 , wherein the lens unit has a plurality of partition regions, each of which includes the Fresnel lens.

25. The lens unit of claim 24 , wherein the lens unit has a rectangular shape in its entirety.

26. The lens unit of claim 25 , wherein each of the partition regions has a rectangular shape.

27. The lens unit of claim 24 , wherein the plurality of partition regions includes inner partition regions surrounded by a plurality of other partition regions and each of the inner partition regions has the lens formed in its entire surface.

28. The lens unit of claim 27 , wherein a center of the inner partition region coincides with a center of the lens included in the inner partition region.

29. The lens unit of claim 27 , wherein the plurality of partition regions includes outer partition regions having portions not surrounded by the plurality of other partition regions and a center of each of the outer partition regions is deviated from a center of the lens included in each of the outer partition regions in an outward direction.

30. The lens unit of claim 29 , wherein the outer partition regions have non-lens portions in their outer portions, the non-lens portions not being formed with the lenses.

31. The lens unit of claim 29 , wherein each of the outer partition regions has the lens formed in its entire surface.

Assignees

• Rohm Co Ltd

Inventors

• Shimizu Hirotaka

Classifications

• F21V29/773

  the planes containing the fins or blades having the direction of the light emitting axis · CPC title

• F21V29/89

  Metals · CPC title

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title

• F21W2131/40

  Lighting for industrial, commercial, recreational or military use · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title