LED BASED LAMP AND METHOD FOR MANUFACTURING THE SAME

• US 20120001531A1
• Filed: 01/28/2011
• Published: 01/05/2012
• Est. Priority Date: 06/30/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: CHO, Hankyu, Kim, Hyunha, Moon, Euna
• Granted Patent: US 8,884,501 B2
• Time in Patent Office: Days
• US Class Current: 313/46
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21V 5/002 using microoptical elements for redirecting or diffusing light
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light emitting diode (LED) based lamp is provided that may include a housing, a LED module having at least one LED to emit light, and a lens to receive the light from the LED and to guide the light to a specific area. An outer circumference of the lens may have a different surface roughness than an inner surface of the lens or may have a different light transmissivity than the inner surface of the lens. The outer circumference of the lens may minimize light from being transmitted to a region outside the specific area.

Claims

1. A light emitting diode (LED) based lamp comprising:

a housing;

a LED module having at least one LED to provide light, the LED module provided in the housing;

a lens to receive the light from the LED and to guide the light to a specific area, and

wherein an outer circumference surface of the lens to minimize light from being transmitted to a region outside the specific area, and the outer circumference surface of the lens has one of a different surface roughness than an inner surface of the lens or a different light transmissivity than the inner surface of the lens.

2. The LED based lamp of claim 1, wherein the lens includes an adjustor.

3. The LED based lamp of claim 2, wherein the adjustor is ring-shaped.

4. The LED based lamp of claim 2, wherein the adjustor includes a plurality of uneven parts.

5. The LED based lamp of claim 4, wherein the surface roughness of the outer circumference surface of the lens is greater than the surface roughness of the inner surface of the lens.

6. The LED based lamp of claim 4, wherein the uneven parts are provided on a front surface of the lens or on a rear surface of the lens.

7. The LED based lamp of claim 1, wherein the light transmissivity of the outer circumference surface of the lens is less than the light transmissivity of the inner surface of the lens.

8. The LED based lamp of claim 1, wherein the housing comprises a heat sink.

9. The LED based lamp of claim 1, further comprising a lens unit that includes the lens and a window around a circumference of the lens.

10. A light emitting diode (LED) based lamp comprising:

a housing;

a LED module having at least one LED to provide light, the LED module provided in the housing;

a lens to receive the light from the LED and to guide the light to a specific area away from the LED based lamp, the lens including a surface; and

an adjustor on the lens to minimize light from being transmitted to a region outside of the specific area, wherein the adjustor has one of a different surface roughness than an inner area of the surface of the lens or a different light transmissivity than the inner area of the surface of the lens.

11. The LED based lamp of claim 10, wherein the adjustor is ring- shaped.

12. The LED based lamp of claim 10, wherein the adjustor includes a plurality of uneven parts.

13. The LED based lamp of claim 12, wherein the uneven parts are provided on a front surface of the lens or on a rear surface of the lens.

14. The LED based lamp of claim 10, wherein the surface roughness of the adjustor is greater than the surface roughness of the inner area of the surface of the lens.

15. The LED based lamp of claim 10, wherein the light transmissivity of the adjuster is less than the light transmissivity of the inner area of the surface of the lens.

16. The LED based lamp of claim 10, wherein the housing comprises a heat sink.

17. The LED based lamp of claim 10, further comprising a lens unit that includes the lens and a window around a circumference of the lens, and the adjustor is provided at a boundary of the lens and the window.

18. The LED based lamp of claim 10, wherein the adjustor is configured to substantially reflect the light.

19. The LED based lamp of claim 10, wherein the adjustor is configured to cause irregular reflection of the light.

20. The LED based lamp of claim 10, wherein the adjustor is configured to cause total reflection of the light.