Patent Application
20090046466
This application claims priority to Taiwan Application Serial Number 96130381, filed Aug. 16, 2007, which is herein incorporated by reference.
1. Field of the Invention
The invention relates to a light emitting diode (LED) module and, more particularly, to a positioning structure of a LED module.
2. Description of the Related Art
A light emitting diode (LED) is a type of micro solid state light source, has advantages of a small volume, a preferred resistance to shock, electricity-saving, a long life, various colors and so on, and can cooperate with various types of new application requirements, and the LED has been a light source which may be seen everywhere in daily life. Along with the luminous efficiency of the LED becomes higher and higher, the color rendering and the color temperature of the LED become better and better and the price falls, so that the illumination application field of the LED will become broader and broader.
Since the LED may be driven by a low voltage and a low current, it has small power consumption, which saves energy. The LED has a high resistance to shock and may be operated in high frequency, and the waste of the destroyed LED may be recovered to protect the environment. The LED may be flat packaged and may be developed to be a light, slim, short and small product, and based on the above advantages, the LED has good prospects and will be a potential product to replace conventional illuminating apparatus.
In a preferred embodiment of the invention, a light emitting diode (LED) module is provided to position a LED component on a base.
According to a preferred embodiment of the invention, a LED module is provided. The LED module includes a base, a LED component, a pressing piece and a plurality of screws. The base has a top surface and a positioning hole on the top surface. The LED component has a bottom surface and includes a positioning protrusion on the bottom surface.
When the LED component is disposed on the base, the positioning protrusion is coupled with the positioning hole to position the LED component at the base. One pin of the LED component is located between the pressing piece and the base, and the screws can pass through the base and the pressing piece to lock the pressing piece at the base. The pressing piece may be an elastic member, and the base may be a metal core printed circuit board (MCPCB). In other embodiment, the base may be a heat dissipation base, and the pressing piece is a printed circuit board, and the material of the heat dissipation base is a heat conduction material. Wherein the pressing piece has an opening and one luminous surface of the LED component is exposed from the opening.
The LED module may further include a heat pipe, the base has a passage under the positioning hole, and one end of the heat pipe is disposed in the passage. The LED module can further include an elastic member provided in the passage and used to fix the heat pipe into the passage. The LED module can further include a plurality of heat dissipation fins which are disposed at the other end of the heat pipe and are opposite to the passage.
The LED module can further include a reflector fixed on the base. The LED module can further include a thermal grease coated at the bottom surface of the LED component.
In a LED module of a preferred embodiment of the invention, the positioning protrusion at the bottom surface of the LED component is coupled with the positioning hole of the base to position the LED component on the base. The LED module can make the LED component fixed on the base by the screws and the pressing piece, which restricts the displacement of the LED component in a Z direction. Since the reflector, the pressing piece and the base may be locked by the same group of the screws, affection caused by accumulative tolerance is decreased during the assembly of the LED module. The LED component can directly contact with the base, which makes the heat conductive path shortened to decrease the heat resistance and facilitates the heat dissipation of the LED component.
These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings.
The following clearly illustrates the spirit of the invention with accompanying drawings and detailed description, and after understanding embodiments of the invention, persons having ordinary skill in the art may make various modifications and changes without departing from the scope and spirit of the invention according to the technology disclosed by the invention.
Please refer to
When the LED component 120 is disposed on the base 110, the bottom surface 122 of the LED component 120 contacts with the top surface 112 of the base 110, and the positioning protrusion 124 is coupled with the positioning hole 114 of the base 110 to effectively position the LED component 120 on the base 110 in X and Y directions. The positioning protrusion 124 and the positioning hole 114 may be circular or polygonal.
The LED component 120 has a pin 126 located between the pressing piece 130 and the base 110. The pin 126 of the LED component 120 contacts with the bottom surface of the pressing piece 130, and the pin 126 is located between the pressing piece 130 and the base 110. At this time, the base 110, the LED component 120 and the pressing piece 130 may be locked by the screws 140 which pass through the base 110 and the pressing piece 130, and thereby the displacement of the LED component 120 in the Z direction is restricted.
In addition, the pressing piece 130 of the embodiment has an opening 134 from which the luminous surface of the LED component 120 is exposed. The bottom surface 122 of the LED component 120 can further be coated with a thermal grease to make the heat generated by the LED component 120 dissipated via the base 110.
In the embodiment, the base 110 is a heat dissipation base, and the pressing piece 130 is a printed circuit board (PCB), and the material of the heat dissipation base is heat conduction material such as metal material, ceramic material or high polymer material, wherein the metal material is copper or aluminum. The bottom surface of the PCB of the pressing piece 130 can have a welding spot 132, and the pin 126 contacts with the welding spot 132. In other embodiment, the base 110 may also be a metal core printed circuit board (MCPCB) and the pressing piece 130 may be an elastic member. The material of the metal part of the MCPCB may be copper or aluminum.
Please refer to
One end 252 of the heat pipe 250 is disposed in the passage 218 of the base 210, and the LED module 200 can include a plurality of heat dissipation fins 270 which are disposed at the other end 254 of the heat pipe 250 and are opposite to the base 210. The heat generated by the LED component 220 is directly conducted to the base 210 and then is conducted to the heat pipe 250 via the base 210, and finally, the heat is dissipated via the heat dissipation fins 270.
The LED module 200 may be applied to a headlight structure. At this time, the LED module 200 can further include a reflector 280, and in the embodiment, the reflector 280, the pressing piece 230 and the base 210 may be locked by the screws 240. Light emitted by the LED component 220 may be adjusted to a wanted light shape via the reflector 280, and then the adjusted light is emitted out of the opening of the reflector 280.
Please refer to
The LED module 300 can further include a reflector 380 which can also make the pressing piece 330 locked to the base 310 via the screws 340. Light emitted by the LED component 320 may be adjusted to a wanted light shape via the reflector 380, and then the adjusted light is out of the opening of the reflector 380.
Although the present invention has been described in considerable detail with reference to certain preferred embodiments thereof, the disclosure is not for limiting the scope of the invention. Persons having ordinary skill in the art may make various modifications and changes without departing from the scope and spirit of the invention. Therefore, the scope of the appended claims should not be limited to the description of the preferred embodiments described above.
| Number | Date | Country | Kind |
|---|---|---|---|
| 96130381 | Aug 2007 | TW | national |
