LENS HAVING DENSELY-DISTRIBUTED CONVEX FACETS ON ITS ENTRANCE AND EXIT SURFACES

• US 20150354780A1
• Filed: 03/06/2013
• Published: 12/10/2015
• Est. Priority Date: 01/10/2013
• Status: Active Grant

• Current Assignee: Aurora Corporation
• Original Assignee: Aurora Corporation
• Inventors: WANG, Ju Tang
• Granted Patent: US 9,683,716 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 17/10 characterised by specific fastening means or way of fastening F21V17/02 - F21V17/08 take precedence
• CPC Class Codes: F21V 23/001 the elements being electrical wires or cables
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21V 7/048 with facets structure
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 3/08 with discontinuous faces, e.g. Fresnel lens diffractive Fresnel lenses G02B5/1876

Abstract

LED-integrated lens comprising a light-entering section (1) in the shape of a hole, a light-emitting section (2) in the shape of a cup, incorporating an optical lens (3) positioned between said light-entering and light-emitting sections (1, 2) wherein the external surfaces of the light-entering (1) and of the light-emitting (2) sections include portions having densely-distributed convex facets. This lens enhances light utilisation efficiency, avoids creating spots with colour aberration hence greatly improves colour rendering.

Claims

1. An LED integrated light source lens comprising a light entering section in the shape of a hole, a light emitting section in the shape of a cup, incorporating an optical lens positioned between the light entering section and the light emitting section, wherein the external surfaces of the light entering and emitting sections include portions having densely distributed convex facets.

2. The lens according to claim 1, wherein the optical lens has a spotted surface on one side.

3. The lens according to claim 2, wherein the optical lens has a curved surface on the other side.

4. The lens according to claim 3, wherein the curved surface is convex.

5. The lens according to claim 1, wherein the hole is provided with a non-spherical surface at its base.

11. A downlight comprising a casing, a light source, a lens according to any previous claim, a lens holder and a heat sink.

12. The downlight according to claim 11, the downlight further comprising a glass and retaining means for the glass.

13. The downlight according to claim 11, wherein the light source comprises one or more LEDs mounted on a circuit board.

14. The downlight according to claim 13, wherein the circuit board is formed of a ceramic material.

15. The downlight according to claim 13, wherein the circuit board is formed of aluminium and a brass or copper disc is located between the circuit board and the heat sink.

6. An LED integrated light source lens comprising a plurality of light entering sections, each in the shape of a hole, a light emitting section associated with each of the light entering sections, the light emitting section being in the shape of a cup, is disclosed incorporating an optical lens positioned between each light entering section and the associated light emitting section, wherein the external surfaces of the associated light entering and emitting sections include portions having densely distributed convex facets.

7. The lens according to claim 6, wherein each optical lens has a spotted surface on one side.

8. The lens according to claim 7, wherein each optical lens has a curved surface on the other side.

9. The lens according to claim 8, wherein the curved surface is convex.

10. The lens according to claim 6, wherein each hole is provided with a non-spherical surface at its base.