STREET ILLUMINATING DEVICE

• US 20090237929A1
• Filed: 09/02/2008
• Published: 09/24/2009
• Est. Priority Date: 03/24/2008
• Status: Active Grant

• Current Assignee: Gold Charm Limited (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Kuo, Yuan-Lung, Lee, Han-Lung, Yu, Tai-Cherng, Louh, Sei-Ping, Lin, Da-Wei
• Granted Patent: US 7,712,928 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• 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 retaining frame;

a light source module comprising a printed circuit board retained in the retaining frame, 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

a heat dissipating module in thermal contact with the second surface of the printed circuit board.

2. The street illuminating device of claim 1, wherein the retaining frame comprises a first retaining step and a second retaining step adjacent to the first retaining step, 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.

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 1, wherein the light reflecting plate is engaged with an inner wall of the retaining frame, and each of the through holes is truncated cone shaped.

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