Street illuminating device

• US 7,712,928 B2
• Filed: 09/02/2008
• Issued: 05/11/2010
• Est. Priority Date: 03/24/2008
• Status: Expired due to Fees

• Current Assignee: Gold Charm Limited (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lee, Han-Lung, Kuo, Yuan-Lung, Yu, Tai-Cherng, Louh, Sei-Ping, Lin, Da-Wei
• Primary Examiner(s): Lee; Y My Quach
• Application Number:
  US12/202,595
• Publication Number:
  US 20090237929A1
• Time in Patent Office: 616 Days
• Field of Search: 362/97.2, 362/97.3, 362/97.4, 362/218, 362/240, 362/241, 362/249.02, 362/294, 362/373, 362/633, 362/800, 362/217.11, 362/217.15
• US Class Current: 362/294
• CPC Class Codes: F21S 8/08 with a standard F21S6/00 takes precedence
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/717 using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A street illuminating device includes a retaining frame, a light source module, and a heat dissipating module. The light source module includes a printed circuit board retained in the retaining frame, a number of solid state lighting elements, and a light reflecting plate. The printed circuit board has a first surface and an opposite second surface. The solid state lighting elements are arranged on the first surface of the printed circuit board. The light reflecting plate includes a number of through holes with inner reflecting surfaces. The light reflecting plate is disposed on the first surface of the printed circuit board with the solid state lighting elements received in the respective through holes. The heat dissipating module is in thermal contact with the second surface of the printed circuit board.

Claims

1. A street illuminating device, comprising:

a hollow retaining frame comprising an inner space, a first opening and an opposite second opening, the first opening and the second opening communicating the inner space with outside;

a light source module retained in the inner space of the retaining frame, the light source module comprising a printed circuit board, a plurality of solid state lighting elements; and

a light reflecting plate comprising a plurality of through holes with inner reflecting surfaces therein, the printed circuit board having a first surface and an opposite second surface, the solid state lighting elements arranged on the first surface of the printed circuit board, the light reflecting plate being disposed on the first surface of the printed circuit board, with the solid state lighting elements received in the respective through holes and facing the first opening; and

a heat dissipating module in thermal contact with the second surface of the printed circuit board, the heat dissipating module exposed to the outside through the second opening and configured for conducting heat from the printed circuit board to the outside.

2. The street illuminating device of claim 1, wherein the retaining frame further comprises a first retaining step and an adjacent second retaining step formed in an inner wall of the retaining frame, the printed circuit board being retained on the first retaining step.

3. The street illuminating device of claim 2, wherein the heat dissipating module comprises a heat conduction plate retained on the second retaining step and in thermal contact with the second surface of the printed circuit board, a plurality of heat pipes with working fluid therein in contact with the heat conduction plate, and a plurality of heat sinks in thermal contact with the heat pipes, the heat pipes and the heat sinks are arranged outside of the retaining frame.

4. The street illuminating device of claim 3, wherein the retaining frame and the heat conduction plate are made of a same material.

5. The street illuminating device of claim 3, wherein each of the heat pipes comprises an evaporator section in contact with the heat conduction plate, and a condenser section penetrating through the heat sinks.

6. The street illuminating device of claim 3, wherein the printed circuit board, the heat conduction plate and the light reflecting plate each are engaged with the inner wall of the retaining frame, the retaining frame defines a first outside surface adjacent to the first opening and an opposite second outside surface adjacent to the second opening, the light reflecting plate has a surface coplanar with the first outside surface, the heat conduction plate has a surface coplanar with the second outside surface.

7. The street illuminating device of claim 1, wherein each of the through holes of the light reflecting plate is truncated cone shaped and tapers in a direction toward the respective solid state lighting element.

8. A street illuminating device, comprising:

a hollow retaining frame comprising an inner space, a first outside surface and an opposite second outside surface, a first opening at the first outside surface and a second opening at the second outside surface, the first opening and the second opening communicating the inner space with outside;

a light source module retained in the inner space of the retaining frame, the light source module comprising a printed circuit board, a plurality of solid state lighting elements and a light reflecting plate comprising a plurality of through holes with inner reflecting surfaces therein, the printed circuit board having a first surface and an opposite second surface, the solid state lighting elements arranged on the first surface of the printed circuit board, the light reflecting plate being disposed on the first surface of the printed circuit board, with a surface thereof coplanar with the first outside surface of the retaining frame and the solid state lighting elements received in the respective through holes and facing the first opening; and

a heat dissipating module comprising a heat conduction plate, the heat conduction plate defining a first conducting surface in thermal contact with the second surface of the printed circuit board, and an opposite second conducting surface coplanar with the second outside surface of the retaining frame, the heat dissipating module conducting heat from the printed circuit board to the outside through the second opening.

9. The street illuminating device of claim 8, wherein the retaining frame further comprises a first retaining step and an adjacent second retaining step formed in an inner wall of the retaining frame, the first retaining step and the second retaining step divide the inner space of the retaining frame into three receiving regions, and the light reflecting plate, the printed circuit board and the heat conduction plate are received in sequence in the three receiving regions, respectively.

10. The street illuminating device of claim 9, wherein the printed circuit board and the heat conduction plate are disposed on the first retaining step and the second retaining step, respectively, and the light reflecting plate is engaged with the inner wall of the retaining frame.

11. The street illuminating device of claim 8, wherein the retaining frame and the heat conduction plate are made of a same material.

12. The street illuminating device of claim 8, wherein the heat dissipating module further comprises a plurality of heat pipes with working fluid therein in contact with the heat conduction plate, and a plurality of heat sinks in thermal contact with the heat pipes, the heat pipes and the heat sinks are arranged outside of the retaining frame.

13. The street illuminating device of claim 8, wherein each of the through holes of the light reflecting plate is truncated cone shaped and tapers in a direction toward the respective solid state lighting element.