Light-guiding module and LED lamp using the same

• US 7,926,974 B2
• Filed: 12/09/2008
• Issued: 04/19/2011
• Est. Priority Date: 08/26/2008
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: Hu, Xiao-Yu, Chen, Yong-Dong, Wung, Shih-Hsun
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US12/331,394
• Publication Number:
  US 20100053953A1
• Time in Patent Office: 861 Days
• Field of Search: 362/225, 362/235, 362/237, 362/249.02, 362/555
• US Class Current: 362/237
• 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: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp includes a heat sink, a plurality of LED modules mounted on a top of the heat sink and a plurality of light-guiding modules respectively fixed on the LED modules. The heat sink includes a base and a plurality of fins extending downwardly from the base. Each LED module includes a plurality of LEDs mounted thereon. Each light-guiding module includes a mounting bracket defining a plurality of through holes therein and a plurality of guiding units respectively received in the through holes of the mounting bracket. The guiding units are respectively in alignment with the LEDs of a corresponding LED module and receive the LEDs in lower ends thereof to reflect and guide light generated by the corresponding LED module in a predetermined manner.

Claims

1. A light-guiding module adapted for being fixed on a light-emitting diode (LED) module to guide light emitted by a plurality of LEDs of the LED module, the light-guiding module comprising:

a mounting bracket with a top surface, the top surface defining a plurality of through holes therein; and

a plurality of individual guiding units separably formed from the mounting bracket and respectively received in the through holes of the mounting bracket, each guiding unit comprising an engaging flange and a plurality of inclined sidewalls, the plurality of inclined sidewalls interconnected together to define a lower opening by a lower end thereof and an upper opening by an upper end thereof, the lower opening being smaller than that of the upper opening and disposed towards an underside of the mounting bracket and opposite to the upper opening, the engaging flange extending outwardly from a circumference of the upper opening thereof and resting on the top surface of the mounting bracket;

wherein each of the guiding units is adapted for receiving a corresponding LED therein for reflecting and guiding light generated by the corresponding LED in a predetermined manner.

2. The light-guiding module as claimed in claim 1, wherein the lower end of the guiding unit extends downwardly through the corresponding through hole of the mounting bracket adapted for receiving the corresponding LED in the lower opening thereof.

3. The light-guiding module as claimed in claim 1, wherein the mounting bracket comprises a fixing board in which the through holes are formed, two restricting flanges adapted to be located at two opposite lateral sides of the LED module and two supporting flanges extending downwardly from a bottom surface of the fixing board.

4. The light-guiding module as claimed in claim 3, wherein the supporting flanges parallel to the restricting flanges are perpendicular to the fixing board and adapted to be rested on a top surface of the LED module.

5. An LED lamp, comprising:

a heat sink comprising a base and a plurality of fins extending downwardly from a bottom surface of the base;

a plurality of LED modules mounted on a top of the heat sink and comprising a plurality of LEDs mounted thereon; and

a plurality of light-guiding modules respectively fixed on the LED modules, each of the light-guiding modules comprising a mounting bracket defining a plurality of through holes therein, a plurality of guiding units separably formed from the mounting bracket and respectively received in the through holes of the mounting bracket;

wherein the guiding units are respectively in alignment with the LEDs of the LED modules and receive the LEDs in lower ends thereof to reflect and guide light generated by the LEDs in a predetermined manner, and wherein the heat sink comprises a plurality of mounting members each having a connecting plate extending upwardly from a top surface of the base and a mounting plate connected to a top end of the connecting plate, every two of the LED modules are mounted on the mounting plate.

6. The LED lamp as claimed in claim 5, wherein the connecting plates are parallel to each other, perpendicular to the base and decrease in height from a midline of the top surface of the base toward two lateral opposite sides of the base.

7. The LED lamp as claimed in claim 5, wherein the mounting plates are mounted on and angled from the top surface of the base, wherein the angles between the mounting plates and the top surface of the base gradually decrease from a midline of the top surface of the base toward the two opposite lateral sides of the base.

8. The LED lamp as claimed in claim 5, wherein the fins are perpendicular to the base and parallel to two opposite lateral sides of the base and the connecting plates.

9. The LED lamp as claimed in claim 5, wherein each of the guiding units comprises a plurality of inclined sidewalls interconnected together to define a lower opening by a lower end thereof and an upper opening by an upper end thereof, and wherein the lower opening is smaller than that of the upper opening and located at an underside of the mounting bracket and opposite to the upper opening.

10. The LED lamp as claimed in claim 9, wherein each of the guiding units has an engaging flange extending outwardly from a circumference of the upper opening thereof and resting on a top surface of the mounting bracket.

11. The LED lamp as claimed in claim 9, wherein the lower end of the guiding unit extends downwardly through a corresponding through hole of the mounting bracket and receives a corresponding LED in the lower opening thereof.

12. The LED lamp as claimed in claim 5, wherein the mounting bracket comprises a fixing board in which the through holes are formed, two restricting flanges located at two opposite lateral sides of a corresponding LED module and two supporting flanges extending downwardly from a bottom surface of the fixing board.

13. The LED lamp as claimed in claim 12, wherein the supporting flanges are parallel to the restricting flanges, perpendicular to the fixing board and rested on a top surface of the corresponding LED module, the restricting flanges are rested a top surface of a corresponding mounting plate.

14. The LED lamp as claimed in claim 5, wherein the heat sink is made of a heat conductive material.

15. The LED lamp as claimed in claim 14, wherein the conductive material is copper or aluminum.

16. The LED lamp as claimed in claim 9, wherein inner surfaces of the inclined sidewalls facing a corresponding LED are applied with a light reflecting material.

17. A light-guiding module adapted for being fixed on a light-emitting diode (LED) module to guide light emitted by a plurality of LEDs of the LED module, the light-guiding module comprising:

a mounting bracket defining a plurality of through holes therein; and

a plurality of individual guiding units separably formed from the mounting bracket and respectively received in the through holes of the mounting bracket;

wherein each of the guiding units is adapted for receiving a corresponding LED therein for reflecting and guiding light generated by the corresponding LED in a predetermined manner; and

wherein the mounting bracket comprises a fixing board in which the through holes are formed, two restricting flanges adapted to be located at two opposite lateral sides of the LED module and two supporting flanges extending downwardly from a bottom surface of the fixing board.

18. The light-guiding module as claimed in claim 17, wherein the supporting flanges parallel to the restricting flanges are perpendicular to the fixing board and adapted to be rested on a top surface of the LED module.