LIGHT-EMITTING DIODE LAMP

• US 20140307444A1
• Filed: 07/13/2012
• Published: 10/16/2014
• Est. Priority Date: 07/14/2011
• Status: Active Grant

• Current Assignee: Vitrulux Limited Liability Company
• Original Assignee: Vitrulux Limited Liability Company
• Inventors: Gorlinskiy, Bronislav Vladislavovich, Panteleev, Yuri Sergeevich
• Granted Patent: US 9,435,495 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• 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 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• 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 5/048 the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• 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 19/0066 in the form of an LED array

Abstract

LED lamp (100) including a lens (206) and an LED (204). The lens (206) has a parabolic section (506) defined about axis (510) and a focus (514). The parabolic section (506) includes a surface traverse to the axis (510) and extending from the axis (510) to a periphery of the parabolic section (506) at a first end of the parabolic section (506). The parabolic section (506) includes a channel (512) extending along the axis (512) at least partially inside the parabolic section (506) at a second end of the parabolic section (506). The LED (204) is disposed in the channel (512) at the focus (514). First light rays are internally reflected in the lens (206) and collimated through the surface. Second light rays are transmitted through the lens (206) and the surface in parallel to the axis (510). Third light rays are refracted by the surface toward the axis (510).

Claims

1. A light-emitting diode lamp comprising:

an optically-transparent lens including a parabolic section, the parabolic section defined about an axis and having a focus, the parabolic section comprising;

a continuous surface traverse to the axis and extending from the axis to a periphery of the parabolic section at a first end of the parabolic section, and

a channel extending along the axis at least partially inside the parabolic section at a second end of the parabolic section, the second end being substantially opposed to the first end; and

a light-emitting diode configured to emit light and being disposed in the channel at the focus of the parabolic section, the channel filled with an optically-transparent material that eliminates an interface between the light-emitting diode and the optically-transparent lens light such that first light rays of the light are internally reflected and collimated through the continuous surface, second light rays of the light are transmitted through the optically transparent lens and the continuous surface in parallel to the axis, and third light rays of the light are refracted by the continuous surface toward the axis.

2. The light-emitting diode lamp according to claim 1, further comprising a riser section extending from the second end of the parabolic section, such that the channel is continuous through the riser and at least partially inside the parabolic section.

4. The light-emitting diode lamp according to claim 1, wherein the optically-transparent material is an optically-transparent gel.

5. The light-emitting diode lamp according to claim 2, further comprising a light-emitting diode assembly, wherein the light-emitting diode assembly comprises:

a circuit board to which the light-emitting diode is electrically secured; and

an arcuate optically-transparent dome secured to the circuit board, the optically-transparent dome encapsulating the light-emitting diode.

6. The light-emitting diode lamp according to claim 5, wherein the optically-transparent lens is secured to the circuit board of light-emitting diode assembly, such that the arcuate optically-transparent dome and the encapsulated light-emitting diode are disposed in the channel at approximately the axis.

7. The light-emitting diode lamp according to claim 5, wherein the circuit board is electrically secured to a second circuit board.

8. The light-emitting diode lamp according to claim 7, wherein the optically-transparent lens is secured to the second circuit board, such that the light-emitting diode assembly is disposed in the channel at approximately the axis.

9. The light-emitting diode lamp according to claim 1, wherein optically-transparent lens is made from an optically-transparent material that is continuous from the channel to the periphery and the continuous surface of the optically-transparent lens.

10. The light-emitting diode lamp according to claim 1, further comprising:

an optically-transparent screen disposed above the optically-transparent lens, the optically transparent screen having a first side and a substantially opposed second side; and

an optically-transparent layer deposited over at least a portion of the first side of the optically-transparent screen, the optically-transparent layer including an array of lenses formed in a three-dimensional coordinate system to refract and defuse light emitted from the light-emitting diode and passed through the lens such that the light passes through the first side and then through the second side of the optically-transparent screen.

11. The light-emitting diode lamp according to claim 1, further comprising an optically-transparent screen disposed above the optically-transparent lens, the optically transparent screen having a first side and a substantially opposed second side, wherein the first side is formed to include an array of lenses in a three-dimensional coordinate system to refract and defuse light emitted from the light-emitting diode and passed through the lens such that the light passes through the array of lenses in the first side and then through the second side.

12. The light-emitting diode lamp according to claim 10, wherein the array of lenses is at least one of random and pseudo-random.

13. The light-emitting diode lamp according to claim 1, wherein the light-emitting diode lamp is a lighting fixture or secured to a lighting fixture.

26. The light-emitting diode lamp according to claim 10, wherein the array of lenses includes one or more prisms.

32. The light-emitting diode lamp according to claim 1, wherein the optically transparent material is at least one of heat resistant and pliable.

33. The light-emitting diode lamp according to claim 1, wherein the-optically-transparent material has a first index of refraction, the optically-transparent lens has a second index of refraction, and the first index of refraction is equal to the second index of refraction.

34. The light-emitting diode lamp according to claim 1, wherein the-optically-transparent material has a first index of refraction, the optically-transparent lens has a second index of refraction, and the first index of refraction is equal to the second index of refraction.

35. The light-emitting diode lamp according to claim 5, wherein the-optically-transparent material has a first index of refraction, the optically-transparent lens has a second index of refraction, the optically-transparent dome has a third index of refraction, and the first index of refraction is equal to the second index of refraction and to the third index of refraction.

36. The light-emitting diode lamp according to claim 10, wherein the optically-transparent screen has a first index of refraction, the optically-transparent layer has a second index of refraction, and the first index of refraction is equal to the second index of refraction.

3. (canceled)

14-25. -25. (canceled)

27-31. -31. (canceled)