LED LAMP

• US 20150354757A1
• Filed: 01/22/2014
• Published: 12/10/2015
• Est. Priority Date: 01/22/2013
• Status: Abandoned Application

• Current Assignee: Seoul Semiconductor Co., Ltd.
• Original Assignee: Seoul Semiconductor Co., Ltd.
• Inventors: Kang, Ki Tae, Lee, Jin Wook
• Application Number:
  US14/762,780
• Publication Number:
  US 20150354757A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• 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 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21V 7/0066 specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified F21V7/16 - F21V7/30 take precedence
• 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]

Abstract

The present invention relates to an LED lamp having improved directivity, which includes: a substrate having light emitting sources mounted on the front surface thereof; an inner cover, which is disposed to cover the substrate and a space to the front of the substrate and which includes a penetration area allowing the penetration of light and a reflection area reflecting light, so that a part of the light emitted from the light emitting sources is reflected by the reflection area and directed toward the sides or the back of the substrate; and an outer cover which is disposed to cover the inner cover and a space to the outside of the inner cover and which allows light to penetrate therethrough.

Claims

1. An LED lamp comprising:

a substrate with light-emitting sources mounted on a front surface thereof;

an inner cover disposed to cover both the substrate and a space in front of the substrate and including a transmissive region transmitting light and a reflective region reflecting light and allowing some fraction of light emitted from the light-emitting sources to be reflected by the reflective region and travel in a lateral or rearward direction of the substrate; and

an outer cover disposed to cover both the inner cover and a space surrounding the inner cover and being permeable to light.

2. The LED lamp according to claim 1, wherein the reflective region faces the light-emitting sources in a rearward direction thereof.

3. The LED lamp according to claim 2, wherein one surface of the reflective region facing the light-emitting sources is formed as a curved surface.

4. The LED lamp according to claim 2, wherein one surface of the reflective region facing the light-emitting sources is formed as a contoured surface.

5. The LED lamp according to claim 1, wherein the reflective region is formed by applying a reflective material to an inner or outer surface of the inner cover.

6. The LED lamp according to claim 1, wherein the reflective region is formed by incorporating a reflective material into the inner cover.

7. The LED lamp according to claim 1, wherein the light-emitting sources comprise LEDs emitting any one of red light, green light, and blue light, and the transmissive region comprises a fluorescent material such that light emitted from the LEDs is converted into white light while traveling through the transmissive region.

8. The LED lamp according to claim 7, wherein the fluorescent material is applied to an inner or outer surface of the inner cover.

9. The LED lamp according to claim 7, wherein the fluorescent material is incorporated into the inner cover.

10. The LED lamp according to claim 1, wherein the inner cover is integrally formed with the transmissive region and the reflective region.

11. The LED lamp according to claim 1, wherein the inner cover is formed by coupling a transmissive section corresponding to the transmissive region to a reflective section corresponding to the reflective region.

12. The LED lamp according to claim 1, further comprising:

a heat sink on which the substrate is mounted.

13. The LED lamp according to claim 12, wherein the heat sink is formed with a protrusion protruding forward therefrom inside a front surface of the heat sink and the substrate is mounted on a front surface of the protrusion.

14. The LED lamp according to claim 13, wherein the inner cover is coupled to the protrusion such that the protrusion is inserted into an open rear portion of the inner cover.

15. The LED lamp according to claim 14, wherein the outer cover is coupled to an edge of the front surface of the heat sink at a rear end thereof, with the inner cover inserted into an open rear portion of the outer cover.

16. The LED lamp according to claim 13, wherein the front surface of the protrusion has an area smaller than or equal to that of the substrate.

17. The LED lamp according to claim 13, wherein the heat sink is formed with a slanted surface on an outer surface of a front end thereof.

20. The LED lamp according to claim 1, further comprising:

a heat sink on which the substrate is mounted, the head sink including a protrusion toward a front of the heat sink,

wherein the substrate is mounted on the protrusion, and the inner cover is coupled to the protrusion such that the protrusion is inserted into an open rear portion of the inner cover.

18. An LED lamp comprising:

a substrate including a front surface and a rear surface;

light-emitting sources mounted on the front surface of the substrate;

an inner cover disposed to cover the substrate and a space in front of the substrate and including a transmissive region transmitting light towards a first direction pointing away from the front surface and a reflective region reflecting light as reflected light and further directing a portion of the reflected light to travel in a second direction different from the first direction; and

an outer cover disposed to cover the inner cover and a space surrounding the inner cover, the outer cover being permeable to light.

19. The LED lamp according to claim 18, wherein the second direction includes a direction pointing to a lateral side or rear of the substrate.