LIGHT SOURCE MODULE AND LED STREET LAMP USING THE SAME

• US 20110007505A1
• Filed: 07/13/2009
• Published: 01/13/2011
• Est. Priority Date: 07/13/2009
• Status: Abandoned Application

• Current Assignee: Pyroswift Holding Co., Limited
• Original Assignee: Pyroswift Holding Co., Limited
• Inventors: WANG, Pei-Choa
• Application Number:
  US12/501,559
• Publication Number:
  US 20110007505A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 5/045 the lens having discontinuous faces, e.g. Fresnel lenses
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 3/005 arranged along a single direction only, e.g. lenticular sheets G02B3/0043 takes precedence
• CPC Class Codes: G02B 3/08 with discontinuous faces, e.g. Fresnel lens diffractive Fresnel lenses G02B5/1876
• CPC Class Codes: Y02B 20/72 in street lighting

Abstract

A light source module includes a base, at least one light emitting diode device, a reflector and a transparent plate. The light emitting diode device is arranged on the base. The reflector is arranged on the base and around the light emitting diode device. The transparent plate is arranged on the reflector and forms a plurality of Fresnel lens portions facing the light emitting diode device. The Fresnel lens portions are aligned along a predetermined direction. The invention further provides a street lamp having the abovementioned light source module.

Claims

1. A light source module, comprising:

a base;

at least one LED device, installed on the base;

a reflector, coupled onto the base and disposed around the LED device; and

a transparent plate, installed on the reflector, and including a plurality of Fresnel lens portions facing the LED device, and the Fresnel lens portions being arranged along a predetermined direction.

2. The light source module of claim 1, wherein the transparent plate includes two Fresnel lens portions of an equal diameter.

3. The light source module of claim 1, wherein the transparent plate includes three Fresnel lens portions, and the Fresnel lens portion at the middle has a diameter greater than the diameter of the remaining Fresnel lens portions.

4. The light source module of claim 1, wherein the transparent plate includes five Fresnel lens portions of an equal diameter.

5. The light source module of claim 1, wherein each Fresnel lens portion has a focal length in a predetermined direction greater than a focal length in another direction perpendicular to the predetermined direction.

6. The light source module of claim 1, wherein the Fresnel lens portions have different focal lengths.

7. A light emitting diode (LED) street lamp, installed on a road, and the road having a predetermined extending direction, and the LED street lamp comprising:

a lamppost, installed on the road;

a lamp seat, installed at a top end of the lamppost;

at least one light source module, installed on the lamp seat for projecting a light towards the road, and the light source module including a base connected to the lamp seat, at least one LED device installed on the base, a reflector connected to the base and disposed around the LED device, and a transparent plate installed onto the reflector, and the transparent plate including a plurality of Fresnel lens portions facing the LED device, and the Fresnel lens portions being substantially arranged in a predetermined extending direction of the road.

8. The light source module of claim 7, wherein the transparent plate includes two Fresnel lens portions of an equal diameter.

9. The LED street lamp of claim 7, wherein the transparent plate includes three Fresnel lens portions, and the Fresnel lens portion at the middle has a diameter greater than the diameter of the remaining Fresnel lens portions.

10. The LED street lamp of claim 7, wherein the transparent plate includes five Fresnel lens portions of an equal diameter.

11. The LED street lamp of claim 7 or 10, wherein each Fresnel lens portion has a focal length in a predetermined direction greater than a focal length in another direction perpendicular to the predetermined direction.

12. The LED street lamp of claim 7, wherein the Fresnel lens portions have different focal lengths.