This Non-provisional application claims priority under 35 U.S.C. ยง119(a) on Patent Application No(s). 101115500 filed in Taiwan, Republic of China on May 2, 2012, the entire contents of which are hereby incorporated by reference.
1. Field of Invention
The invention relates to a light emitting device and, in particular, to a light emitting device using a light emitting diode.
2. Related Art
With the rising awareness of environmental protection, the traditional light bulbs with high power consumption and short life have been considered as subjects to be replaced since they are failed to meet the green Earth demand of energy-saving. However, with the improvement of semiconductor technology, the emergence of LED lights offers consumers with another choice. The characteristic of luminescence of LED lights results in the advantages of low power consumption and long life. In addition, the characteristics of small sizes, multiple varieties of colors, and the fast responses add more business values to LED lights. Therefore, the use of LED lights has become more and more popular.
Although LED lights have the advantage of energy saving, high temperature is still a problem of LED lights that needs to be overcome. In order to improve the brightness of the LED lights, LEDs are arranged densely, which causes the problem of heat source concentration. An effective heat dissipation means is required, otherwise the life of the LED lights will be significantly reduced, which cannot meet consumer demands and also reduces the value of the environmental protection.
As shown in
Therefore, it is an important subject to provide a light emitting device having a heat dissipating element that can be assembled or detached arbitrarily in response to different power needs, thereby reducing the cost and time of research and development, and allowing to change the appearance arbitrary so as to increase the flexibility of the product.
In view of the foregoing subject, an objective of the invention is to provide a light emitting device having a heat dissipating element that can be assembled or detached arbitrarily in response to different power needs. Therefore the reductions of cost and time of research and development can be achieved, and since a user is allowed to change the appearance arbitrary, the flexibility of the product can be increased.
To achieve the above objective, the present invention discloses a light emitting device comprising a body, at least one light emitting unit, at least one heat dissipating element, and a power connecting element. The body has a supporting portion and a locking portion, and the supporting portion is disposed at one end of the locking portion. The light emitting unit is disposed at the supporting portion. The heat dissipating element has an opening, and is detachably connected to the locking portion by the opening. The power connecting element is connected with the body.
In one embodiment, when the light emitting device comprises a plurality of heat dissipating elements, the heat dissipating elements are connected to the locking portion sequentially.
In one embodiment, the heat dissipating element has a planar structure or a three-dimensional structure.
In one embodiment, the heat dissipating element is a ring-shaped planar fin.
In one embodiment, the inner edge of the ring-shaped planar fin is circular, and the outer edge thereof has a regular or irregular shape.
In one embodiment, the ring-shaped planar fin has a closed configuration or an open configuration.
In one embodiment, when the light emitting device comprises a plurality of light emitting units, the light emitting units are arranged in linear, in an array, in a spiral, in a concentric circle, irregularly, or combinations thereof.
In one embodiment, the supporting portion has at least one surface, and the light emitting unit is disposed at the surface.
In one embodiment, the surface comprises at least one flat surface, at least one curved surface, or a combination thereof.
In one embodiment, the light emitting device further comprises a driving circuit electrically connect with the light emitting unit.
In one embodiment, the driving circuit is disposed in the body or outside the body.
In one embodiment, the light emitting device further comprises a lampshade connected with the body to cover the light emitting unit.
In one embodiment, the light emitting device further comprises an insulated housing disposed in the body.
In one embodiment, the heat dissipating element is detachably connected with the locking portion by screwing, engaging, wedging or hooking.
In one embodiment, the locking portion has a solid columnar body or a hollow columnar body.
As mentioned above, the light emitting device of the invention allows a user to assemble heat dissipating elements in view of different power requirements by detachable heat dissipating elements. Compared with the conventional art, the light emitting device of the invention eliminates the need of developing the heat dissipating element for different power requirements when developing products of different powers. Re-molding is not required during manufacturing, and the user can change the appearance arbitrarily by replacing or re-arranging heat dissipating elements based on personal preference. Not only the cost and time to research and develop products are reduced, but also the flexibility of the products is increased.
The present invention will become more fully understood from the subsequent detailed description and accompanying drawings, which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
The body 21 has a supporting portion 212 and a locking portion 214. The supporting portion 212 is disposed at one end of the locking portion 214. The locking portion 214 can have a solid or hollow columnar body.
The light emitting unit 23 may be a light emitting diode or an organic light emitting diode, and can be in the form of a die or a package. The light emitting diode 23 is disposed at the supporting portion 212.
The heat dissipating element 25 has an opening 251. The heat dissipating element 25 is detachably connected to the locking portion 214 by the opening 251. The opening 251 may have a locking structure corresponding to the locking portion 214, so that the heat dissipating element 25 and the locking portion 214 may be connected by, for example but not limited to, screwing, engaging, wedging, and hooking.
The power connecting element 27 is connected with the body 21 to electrically connecting a power source (not shown) for the operation of the light emitting unit 23.
Further speaking, the body 21 may be made of heat dissipating material, for example but not limited to various metals such as aluminum, copper, iron, nickel, titanium, or the alloy thereof. Moreover, if the power of the light emitting device 2 is lower, the material of the body 21 may also be plastics.
In detail, the supporting portion 212 may have at least on surface, and the light emitting unit 23 may be disposed on that surface. The surface may be a flat surface, a curved surface, or the combination thereof. Therefore, when the number of the light emitting unit 23 is plural, they may have different ways of arrangement. The descriptions below will be focused on different aspects of the shapes of the supporting portion 212 and the arrangements of the light emitting unit 23.
As shown in
Specifically speaking, the heat dissipating element 25 may be assembled are detached arbitrarily, and the number can be increased or decreased according to the power of the light emitting device 2 or the preference of the user. Furthermore, to improve the heat dissipating efficiency but also taking into account the flexibility of appearance, the shape of the heat dissipating element 25 may have many variations. The different aspects of the heat dissipating element 25 will be described below.
Referring to
Except for a planar structure, referring to
With reference to
Based on the above, a user may choose a plurality of kinds of heat dissipating elements to use with. As shown in
The use not only can arbitrarily choose one or more kinds of heat dissipating elements, but also can determine the numbers used to be detachably connected at the locking portion 214. As shown in
Moreover, the material of the heat dissipating element may be heat dissipating material, for example but not limited to ceramics, graphite or various metals such as aluminum, copper, iron, nickel, titanium or the alloy thereof. Moreover, if the power of the light emitting device 2 is lower, the material of the heat dissipating element may comprise plastic material.
Referring to
To sum up, the light emitting device of the invention allows a user to assemble heat dissipating elements in view of different power requirements by detachable heat dissipating elements. Compared with the conventional art, the light emitting device of the invention eliminates the need of developing the heat dissipating element for different power requirements when developing products of different powers. Re-molding is not required during manufacturing, and the user can change the appearance arbitrarily by replacing or re-arranging heat dissipating elements based on personal preference. Not only the cost and time to research and develop products are reduced, but also the flexibility of the products is increased.
Although the present invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the present invention.
Number | Date | Country | Kind |
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101115500 | May 2012 | TW | national |