Patent Publication Number: US-8125126-B2

Title: Multi-facet light emitting lamp

Description:
BACKGROUND 
     1. Technical Field 
     The disclosure generally relates to a lamp, and more particularly, to a multi-facet light emitting lamp. 
     2. Technical Art 
     A conventional light emitting diode (LED) bulb usually includes a sealed glass ball, a metal fin for dissipating heat, a LED light source, and a helical lamp base. The LED light source is disposed on a circuit board, and the LED light source and the circuit board are both disposed inside the glass ball. The circuit board is disposed on the metal fin. Accordingly, when the LED light source is driven, the heat generated by the LED light source is dissipated by the metal fin. However, since the metal fin or any other heat dissipating device has to be disposed in the conventional LED bulb, the weight, volume, and cost of the conventional LED bulb cannot be reduced. 
     SUMMARY 
     Accordingly, the disclosure is directed to a multi-facet light emitting lamp with improved heat dissipation performance and relatively smaller volume and lighter weight. 
     The disclosure provides a multi-facet light emitting lamp including a first light source plate, a second light source plate, and a plurality of airflow channels. The first light source plate has at least one first connecting terminal. The second light source plate has at least one second connecting terminal. The first connecting terminal is connected with the second connecting terminal, and an inner space is formed between the first light source plate and the second light source plate. The airflow channels connect the inner space with a space outside the multi-facet light emitting lamp. 
     According to an embodiment of the disclosure, the multi-facet light emitting lamp includes multiple light source plates according to the actual design requirement. The light source plates are connected through connecting terminals thereof. A plurality of airflow channels is formed at where the light source plates adjoin each other, and the airflow channels connect an outer space and an inner space of the multi-facet light emitting lamp. Thus, when the multi-facet light emitting lamp is driven, the heat generated in the multi-facet light emitting lamp is dissipated in the inner space of the multi-facet light emitting lamp and conducted out of the multi-facet light emitting lamp through a heat convection effect of the airflow channels, so that the purpose of heat dissipation is achieved. 
     These and other exemplary embodiments, features, aspects, and advantages of the disclosure will be described and become more apparent from the detailed description of exemplary embodiments when read in conjunction with accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. 
         FIG. 1  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 2  is an enlarged partial view of the multi-facet light emitting lamp in  FIG. 1 . 
         FIG. 3A  and  FIG. 3B  are respectively a top view and a side view of a clasp. 
         FIG. 4  is a cross-sectional view of the multi-facet light emitting lamp in  FIG. 2  along line AA′. 
         FIG. 5  is a diagram of a triangular light source plate. 
         FIG. 6  is a diagram of a supporting frame that can be installed in a multi-facet light emitting lamp. 
         FIG. 7  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 8  is a diagram of a supporting frame that can be installed in a multi-facet light emitting lamp. 
         FIG. 9  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 10A  and  FIG. 10B  are diagrams respectively illustrating a multi-facet light emitting lamp installed with a fan. 
         FIG. 11A  and  FIG. 11B  are diagrams illustrating how a multi-facet light emitting lamp is operated. 
         FIG. 12  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 13A  is a front view facing a light source plate in  FIG. 12 . 
         FIG. 13B  is a cross-sectional view along line BB′ in  FIG. 13A  when the light source plate is a first light source plate. 
         FIG. 13C  is a cross-sectional view along line BB′ in  FIG. 13A  when the light source plate is the first light source plate according to another embodiment of the disclosure. 
         FIG. 13D  is a cross-sectional view along line BB′ in  FIG. 13A  when the light source plate is a second light source plate. 
         FIG. 14  is a diagram illustrating another implementation of the multi-facet light emitting lamp in  FIG. 12 . 
         FIG. 15A  is a top view of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 15B  is a side view of the multi-facet light emitting lamp in  FIG. 15A . 
         FIG. 15C  is a front view of the multi-facet light emitting lamp in  FIG. 15A . 
         FIG. 16A  is a top view of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 16B  is a side view of the multi-facet light emitting lamp in  FIG. 16A . 
         FIG. 16C  is a cross-sectional view of the multi-facet light emitting lamp in  FIG. 16A . 
         FIG. 17  is a side view of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
         FIG. 18  is a front view of a multi-facet light emitting lamp according to an embodiment of the disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Reference will now be made in detail to the embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. 
       FIG. 1  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure,  FIG. 2  is an enlarged partial view of the multi-facet light emitting lamp in  FIG. 1 , and  FIG. 4  is a cross-sectional view of the multi-facet light emitting lamp in  FIG. 2  along line AA′. Referring to  FIG. 1 ,  FIG. 2 , and  FIG. 4 , the multi-facet light emitting lamp  100  in the embodiment includes a plurality of light source plates  110  and a plurality of airflow channels  120 . The light source plates  110  respectively have a plurality of connecting terminals T 1 . Each of the light source plates  110  is connected with adjacent light source plates  110  through the connecting terminals T 1 , and the connected light source plates  110  enclose a football-like body with an inner space (not shown), as shown in  FIG. 1 . 
     In the embodiment, the light source plates  110  may be one or a combination of circular light source plates, triangular light source plates, rectangular light source plates, quadrangular light source plates, pentagonal light source plates, hexagonal light source plates, or other polygonal light source plates. In the multi-facet light emitting lamp  100 , a football-like body is formed by assembling/connecting the light source plates  110 . In the embodiment, the light source plates  110  are one or a combination of pentagonal light source plates and hexagonal light source plates. However, the disclosure is not limited thereto, and in other embodiments, light source plates in other shapes may also be adopted. 
     As shown in  FIG. 4 , in the embodiment, the light source plates  110  include a substrate  112 , a frame  114 , and a light emitting device  116 . The frame  114  is disposed on the substrate  112  and encloses a containing space S 3 , and the light emitting device  116  is disposed in the frame  114  and in the containing space S 3 . In the embodiment, the shape of the frame  114  is determined by the shapes of the light source plates  110 . For example, if the light source plates  110  are pentagonal light source plates, the frame  114  can be designed in a pentagonal shape. Similarly, if the light source plates  110  are hexagonal light source plates, the frame  114  can be designed in a hexagonal shape. The light emitting device  116  is a light emitting chip in the present and following embodiments. 
     The connecting terminal T 1  of each light source plate  110  is located at each vertex on the frame  114  and connected with the frame  114 , and the number of the connecting terminals T 1  is related to the shape of the frame  114 . For example, if the frame  114  is in a pentagonal shape, the number of connecting terminals T 1  located at the vertexes of the frame  114  is 5. Similarly, if the frame  114  is in a hexagonal shape, the number of connecting terminals T 1  located at the vertex of the frame  114  is 6, as shown in  FIG. 2 . 
     In the embodiment, each connecting terminal T 1  has a clasping hole O 1 , as shown in  FIG. 2 . Thus, adjacent light source plates  110  can be clasped together through a clasp  130  illustrated in  FIG. 3A  and  FIG. 3B .  FIG. 3A  and  FIG. 3B  are respectively a top view and a side view of a clasp. A light source plate  110  may be connected with an adjacent light source plate  110  through following technique. First, the connecting terminals T 1  of the two light source plates  110  are placed side by side to form the clasping hole O 1 , as shown in  FIG. 2 . Then, the clasp  130  illustrated in  FIG. 3A  and  FIG. 3B  is pressed into the clasping hole O 1  to connect the adjacent light source plates  110 . All the light source plates  110  can be connected through the same technique to form the football-like body illustrated in  FIG. 1 . In the embodiment, each clasp  130  has three clasp feet  132 , wherein the clasp feet  132  are respectively clasped with the clasping holes O 1 , as shown in  FIG. 2  and  FIG. 3 . Because the top view of the clasp  130  illustrates a hexagonal example, the clasping hole is covered therefore become invisible after each clasp  130  connects adjacent light source plates  110 , as shown in  FIG. 1 . 
     Referring to  FIG. 4  again, the light source plates  110  further include a connector  118 . The connector  118  is located below the substrate  112  and electrically connected to the light emitting device  116  for supplying power. Besides, the light source plates  110  further include an optical device  111 . The optical device  111  is located above the light emitting device  116  and is connected with the frame  114  to form aforementioned containing space S 3 . The optical device  111  may be a light diffusion element for diffusing light beam emitted by the light emitting device  116  out of the multi-facet light emitting lamp  100 . Or, the optical device  111  may also be an optical lens for dispersing the light beam emitted by the light emitting device out of the multi-facet light emitting lamp  100 . Moreover, the optical device  111  may further be a phosphor-doped wavelength conversion element for converting the light beam emitted by the light emitting device  116  into light in other colors so that the light beam can be emitted out of the multi-facet light emitting lamp  100 . 
     Additionally, an airflow channel  120  is formed between adjacent two light source plates  110 . The airflow channels  120  connect the inner space of the multi-facet light emitting lamp and a space S 2  out of the multi-facet light emitting lamp  100 , as shown in  FIG. 1  and  FIG. 2 . To be specific, because in the embodiment, a light source plate  110  is connected with an adjacent light source plate  110  through the connecting terminals T 1 , the frames  114  of the light source plates  110  do not contact each other closely. Accordingly, an opening (i.e., an air flow channel  120 ) is formed between the frames  114  of the light source plates  110 , and the airflow channels  120  connect the inner and outer spaces of the multi-facet light emitting lamp. Moreover, because the light emitting device  116  will produce heat when the light source plates  110  are activated to emit light and the light emitting device  116  is disposed on the substrate  112 , the heat is conducted to the substrate  112  and dissipated through the substrate  112 . 
     In the embodiment, the multi-facet light emitting lamp  100  has a plurality of airflow channels  120 , and the airflow channels  120  connect the inner and outer spaces of the multi-facet light emitting lamp  100 . Thus, when the heat produced by the light emitting device  116  is conducted to the substrate  112  and dissipated through the same, the heat is dispersed into the inner space of the multi-facet light emitting lamp  100 . In this case, since the multi-facet light emitting lamp  100  has the airflow channels  120 , the heat accumulated in the inner space of the multi-facet light emitting lamp  100  is conducted out of the multi-facet light emitting lamp  100  through the airflow channels  120 , so that the purpose of heat dissipation is accomplished. In addition, because the airflow channels  120  are distributed everywhere (the upper portion and the lower portion) on the multi-facet light emitting lamp  100 , based on the fact that warm air rises and cold air falls, the heat produced by the light emitting device  116  rises towards the airflow channels  120  on the upper portion and conducted out of the multi-facet light emitting lamp  100 , fresh air with lower temperature enters the inner space through the airflow channels  120  on the lower portion. In other words, the multi-facet light emitting lamp  100  in the embodiment has an optimal heat convection structure such that heat produced by the light emitting device  116  can be efficiently conducted out of the multi-facet light emitting lamp  100 . Thereby, no conventional heat dissipation fin or cooling device is adopted by the multi-facet light emitting lamp  100  in the embodiment for dissipating heat produced by the multi-facet light emitting lamp  100 . 
     In the embodiment, the multi-facet light emitting lamp  100  further includes a lamp base  140  and a heat-dissipation lamp housing  150 . The heat-dissipation lamp housing  150  is disposed below the football-like body and connected with some light source plates  110 . The lamp base  140  is below the heat-dissipation lamp housing  150  and electrically connected to foregoing light source plates  110 . The football-like body is installed on the heat-dissipation lamp housing  150 , and the heat-dissipation lamp housing  150  is assembled onto the lamp base  140 . However, the assembly procedure is not limited in the disclosure, and which can be changed according to the technique and design adopted. To be specific, the heat-dissipation lamp housing  150  may be a metal pipe having a plurality of airflow openings  152 . Accordingly, besides circulating through the airflow channels  120 , air in the inner space of the multi-facet light emitting lamp  100  may also circulate through the airflow openings  152  of the heat-dissipation lamp housing  150 . Additionally, in the embodiment, the lamp base  140  is implemented in a helical form. Namely, the multi-facet light emitting lamp may be attached to a general socket for emitting light. However, the disclosure is not limited thereto, and the lamp base  140  may also be implemented in any other form, such as that adaptable to a general double-hole socket, triple-hole socket, or any socket pattern adopted by another lamp. 
     Moreover, even though pentagonal light source plates and hexagonal light source plates (as illustrated in  FIG. 2 ) are adopted in the embodiment to construct the football-like body illustrated in  FIG. 1 , the football-like body may also be constructed by using light source plates in other shapes, such as the triangular light source plate  200  illustrated in  FIG. 5 . The triangular light source plate  200  has a similar structure as that of the light source plate  110  illustrated in  FIG. 4 . However, the difference between the two light source plates is that the triangular light source plate  200  has three connecting terminals T 1 , and the frame  210  thereof is in a triangular shape, wherein the light emitting device of the triangular light source plate  200  is also located within the frame  210 . To be specific, because both pentagon and hexagon can be equally divided into a plurality of triangles, the triangular light source plate  200  in the embodiment may also be applied to the football-like body described above, and the connection technique adopted herein is the same as that described above therefore will not be described herein. 
     In the embodiment, the supporting strength and mechanical strength of the football-like body constructed by connecting the light source plates  110  through the connecting terminals T 1  are determined by the light source plates  110  and connecting terminals T 1  adopted. Generally speaking, the supporting strength and mechanical strength of the football-like body should allow the football-like body to be used in an illumination device for a long term. However, in order to further improve the mechanical strength of the multi-facet light emitting lamp  100 , a supporting frame  160  (as shown in  FIG. 6 ) may be further disposed in the multi-facet light emitting lamp  100  for supporting the football-like body composed of the light source plates  110 . To be specific, the supporting frame  160  has a supporting trunk  162  and a plurality of supporting branches  164 . The supporting trunk  162  is suitable for being extended into the inner space of the football-like body for supporting the football-like body. The supporting branches  164  are disposed on the supporting trunk  162  and within the inner space. The supporting branches  164  are suitable for supporting the light source plates  110 . The supporting trunk  162  may be a hollow column. The supporting branches  164  may include a bracket  161  and a supporting holder  163 . The supporting holder  163  is connected to a free end of the bracket  161 . The supporting branches  164  may be arranged regularly or irregularly. 
     In the embodiment, at least one of the supporting trunk  162  and the supporting branches  164  is hollow, which is related to the electrical connections. For example, if the supporting trunk  162  is hollow, the multi-facet light emitting lamp  100  includes a plurality of conductive wires  170 . The conductive wires  170  are respectively buried in the hollow space of the supporting trunk  162  and are respectively and electrically connected to the connectors  118  of the light source plates  110  for driving the light source plates  110  to emit light. In addition, the lamp base  140  is also physically connected with the supporting frame  160 , and the conductive wires  170  buried in the supporting trunk  162  are electrically connected to the lamp base  140 . Accordingly, when an external power source supplies power to the lamp base  140 , the light source plates  110  are driven through the conductive wires  170  to emit light. However, the disclosure is not limited to foregoing description, and in other embodiments, the conductive wires  170  may not be buried in the supporting frame  160  but are directly electrically connected to the light source plates  110  in the inner space of the football-like body. 
     As shown in  FIG. 7 , the multi-facet light emitting lamp  100   a  does not have the heat-dissipation lamp housing  150  as the multi-facet light emitting lamp  100  illustrated in  FIG. 1 . Thus, compared to the multi-facet light emitting lamp  100  in  FIG. 1 , the multi-facet light emitting lamp  100   a  in  FIG. 7  has more light source plates  110 . Because the multi-facet light emitting lamp  100   a  also has the airflow channels  120 , it offers the same advantages as those of the multi-facet light emitting lamp  100  described above, which will not be described herein. 
     In another embodiment, the supporting frame  160  illustrated in  FIG. 6  may also be designed like the supporting frame  260  illustrated in  FIG. 8 . Referring to  FIG. 8 , the supporting frame  260  has a supporting trunk  262  and a plurality of supporting branches  264 . The supporting trunk  262  is suitable for being extended into the inner space of the football-like body for supporting the football-like body. The supporting branches  264  are located on the supporting trunk  262  and within the inner space. The supporting branches  264  are suitable for supporting the light source plates  110 . In particular, the supporting trunk  262  encloses a hollow space  262   a , and the hollow space  262   a  is suitable for containing a driving circuit, conductive wires, or other suitable circuits. In addition, the lamp base  140  is also physically connected with the supporting frame  260 , as shown in  FIG. 8 . The supporting trunk  262  may have a shape of a hollow ball  261  connected with a hollow column  263 . The supporting branches  264  may include a bracket  265  and a supporting holder  266 , wherein the supporting holder  266  is connected to a free end of the bracket  265 . The supporting branches  264  may be arranged regularly or irregularly. 
       FIG. 9  is a diagram of a multi-facet light emitting lamp according to another embodiment of the disclosure. The multi-facet light emitting lamp  300  in the embodiment is similar to the multi-facet light emitting lamp  100  illustrated in  FIG. 1 , and the difference between the two multi-facet light emitting lamps is that in the multi-facet light emitting lamp  100  illustrated in  FIG. 1 , the football-like body is constructed by connecting the light source plates  110 , while in the multi-facet light emitting lamp  300  of the embodiment, the football-like body is constructed by connecting two light source plates  310 . In the embodiment, the light source plates  310  may be flexible substrate and may be implemented as hemispheroids. Each of the light source plates  310  has an airflow channel  312 , and the airflow channel  312  may be formed by drilling a hole in the light source plate  310 , wherein the hole may be in a circular shape, a rectangular shape, a strip shape, or any other shape. The football-like body illustrated in  FIG. 9  is constructed by assembling the two light source plates  310 . To be specific, if the two light source plates  310  are assembled through the connecting terminals T 1 , aforementioned airflow channels  120  are formed at where the two light source plates  310  are connected. In other words, because the multi-facet light emitting lamp  300  in the embodiment also has the airflow channels  120  and  312 , the multi-facet light emitting lamp  300  offers an optimal heat dissipation effect during its operation. Besides, the multi-facet light emitting lamp  300  offers easy assembly since the football-like body illustrated in  FIG. 9  is constructed by using only two light source plates. 
     The light source plates  310  include a substrate  313 , a frame  314 , and a light emitting device  315 . The frame  314  is disposed on the substrate  313  and encloses a containing space  316 , and the light emitting device  315  is disposed in the frame  314  and within the containing space  316 . The frame  314  is disposed on the light source plates  310  so that the substrate  313  can be disposed on the frame  314 . 
     Besides improving the heat dissipation performance of the multi-facet light emitting lamp  100  by adopting the heat-dissipation lamp housing, in other embodiments, the heat dissipation performance may also be improved by adopting other heat dissipating devices. For example, in the multi-facet light emitting lamp  400   a  illustrated in  FIG. 10A , a fan  410  is installed for extracting hot air out of the inner space, so as to facilitate the air circulation. To be specific, the multi-facet light emitting lamp  400   a  in  FIG. 10A  is similar to the multi-facet light emitting lamp  100  described above. However, in the multi-facet light emitting lamp  400   a , a light source plate  110  at the top is replaced by the fan  410 , and an airflow is produced between the inner space and the space out of the multi-facet light emitting lamp by using the fan  410 , so that the heat produced during the operation of the multi-facet light emitting lamp  400  can be effectively dissipated. In the embodiment, the fan  410  may be disposed at a specific light source plate according to the actual design requirement. In the multi-facet light emitting lamp  400   b  illustrated in  FIG. 10B , the fan  410  may be disposed at the lower portion of the multi-facet light emitting lamp  400   b  (i.e., a specific light source plate  110  on the lower portion may be replaced by the fan  410 ). 
       FIG. 11A  and  FIG. 11B  are diagrams respectively illustrating how a multi-facet light emitting lamp is operated. Referring to  FIG. 11A  first, the multi-facet light emitting lamp  500   a  in the embodiment is similar to the multi-facet light emitting lamp  100  illustrated in  FIG. 1 . However, one of the light source plates  110  in the multi-facet light emitting lamp  500   a  is replaced by a wireless control module  510 . The wireless control module  510  is located on the top of the football-like body for receiving an external signal S 1  and turning on or off the light source plates. A user can output the signal S 1  through a remote control  520 . Namely, the light source plates  110  can be turned on or off through the remote control. Such a remote control mechanism may turn on all or some of the light source plates on the football-like body according to the user requirement and the design, and foregoing description is only an example. In addition, referring to  FIG. 11B  again, the wireless control module  510  may also be located at the bottom of the football-like body. 
     In the embodiments described above, a multi-facet light emitting lamp having a football-like body constructed with multiple light source plates and the variations thereof are described. In other embodiments, multi-facet light emitting lamps having optimal heat dissipation performance and other 3D structures constructed with the light source plates may also be provided, which will be described in following paragraphs. 
       FIG. 12  is a diagram of a multi-facet light emitting lamp according to an embodiment of the disclosure,  FIG. 13A  is a front view facing a light source plate in  FIG. 12 ,  FIG. 13B  is a cross-sectional view along line BB′ in  FIG. 13A  when the light source plate is a first light source plate, and  FIG. 13D  is a cross-sectional view along line BB′ in  FIG. 13A  when the light source plate is a second light source plate. Referring to  FIG. 12 ,  FIG. 13A , and  FIG. 13B , the multi-facet light emitting lamp  600  in the embodiment includes a first light source plate  610 , a second light source plate  620 , and a plurality of airflow channels  630 . The first light source plate  610  has a first connecting terminal T 1 , and the second light source plate  620  has a second connecting terminal T 2 , wherein the first connecting terminal T 1  is connected with the second connecting terminal T 2 , and an inner space S 1  is formed between the first light source plate  610  and the second light source plate  620 . The airflow channels  630  connect the inner space S 1  with a space S 2  out of the multi-facet light emitting lamp  600 . 
     In the embodiment, the multi-facet light emitting lamp  600  further includes a carrier  650 . The first light source plate  610  and the second light source plate  620  are disposed on the carrier  650 , and the first light source plate  610 , the second light source plate  620 , and the carrier  650  form the inner space S 1 . 
     As shown in  FIG. 13B , the first light source plate  610  includes a conductive substrate  612  and an insulating layer  614 , wherein the insulating layer  614  is disposed on the conductive substrate  612 . In the embodiment, the first light source plate  610  further includes a light emitting device  616  disposed on the insulating layer  614 . In the embodiment, the conductive substrate  612  may be an aluminium substrate, and the material of the insulating layer  614  may be an aluminium oxide. As shown in  FIG. 13C , in other embodiments, the insulating layer  614  may be a flexible circuit board. In this case, the flexible circuit board has an opening  614   a . The opening  614   a  exposes the conductive substrate  612 , and the light emitting device  616  is disposed on the conductive substrate  612  exposed by the opening  614   a . As shown in  FIG. 13D , in the embodiment, the second light source plate  620  has a substrate  622  and a light emitting device  624 . The substrate  622  may be made of a porous ceramic, such as silicon carbide. Besides, the light emitting device  624  is disposed on the substrate  622 . 
     In the embodiment, because the first light source plate  610  is not physically connected with the adjacent second light source plate  620 , aforementioned airflow channels  630  are formed. In other words, the airflow channels  630  are located at where the first light source plate  610  adjoins the second light source plate  620 . Accordingly, another two opposite sides of the multi-facet light emitting lamp  600  are open so that air in the inner space can flow out through the airflow channels  630 . Thus, when the first light source plate  610  and the second light source plate  620  are driven and accordingly produce heat, the heat is conducted into the external space through the airflow channels  630 , so that an optimal heat dissipation performance can be achieved by the multi-facet light emitting lamp  600 . 
     Similarly, the multi-facet light emitting lamp  600  in the embodiment also has a lamp base  662  and a conductive wire  664 , as shown in  FIG. 12  and  FIG. 13A . The lamp base  662  is located below the first light source plate  610  and the second light source plate  620 . The conductive wire  664  electrically connects the first light source plate  610  and the second light source plate  620  to the lamp base  662 . In the embodiment, the multi-facet light emitting lamp  600  further includes a heat-dissipation lamp housing  670 . The heat-dissipation lamp housing  670  is installed below the first light source plate  610  and the second light source plate  620  and above the lamp base  662 , and the heat-dissipation lamp housing  670  has a plurality of airflow openings  672 . It should be mentioned that the first connecting terminal T 1  and the second connecting terminal T 2  may be fastened together by using a fixer  690 , as shown in  FIG. 12 . Herein the actual implementation may be referred to foregoing description related to the clasp  130 . 
       FIG. 14  is a diagram illustrating another implementation of the multi-facet light emitting lamp in  FIG. 12 . Referring to  FIG. 14 , the multi-facet light emitting lamp  700  has a similar structure as the multi-facet light emitting lamp  600 . However, the multi-facet light emitting lamp  700  in the embodiment further includes at least one molding compound  710  disposed on at least one of the first light source plate  610  and the second light source plate  620 . Besides, a plurality of diffusion particles  720  may be selectively doped in the molding compound  710  for diffusing the light beam emitted by the light emitting device out of the multi-facet light emitting lamp, so as to provide illumination. In an embodiment, the molding compound  710  may also be selectively replaced by a light-transmissive covering, wherein the light-transmissive covering can protect the light emitting device  616  or  624  and diffuse the light beam emitted by the light emitting device  616  or  624  so as to achieve a full light emission effect. The light-transmissive covering may be selectively disposed on at least one of the first light source plate  610  and the second light source plate  620 . Similarly, the light-transmissive covering may also be doped with aforementioned diffusion particles. 
       FIG. 15A  is a top view of a multi-facet light emitting lamp according to an embodiment of the disclosure,  FIG. 15B  is a side view of the multi-facet light emitting lamp in  FIG. 15A , and  FIG. 15C  is a front view of the multi-facet light emitting lamp in  FIG. 15A . referring to  FIG. 15A ,  FIG. 15B , and  FIG. 15C , the multi-facet light emitting lamp  800  in the embodiment adopts the same concept as the multi-facet light emitting lamp  600  in  FIG. 12 . Namely, two light source plates  810  are assembled together, wherein each of the light source plates  810  has a connecting terminal T 1 , and the two light source plates  810  are connected through the connecting terminals T 1 . The difference between the multi-facet light emitting lamp  800  in the embodiment and the multi-facet light emitting lamp  600  is that the connecting terminals T 1  of the light source plates  810  are located at two sides of the multi-facet light emitting lamp  800 , as shown in  FIG. 15B . Thus, aforementioned airflow channels  820  can be respectively formed above and below the two connecting terminals T 1  of the multi-facet light emitting lamp  800  by bending the two light source plates  810 . Similarly, because the multi-facet light emitting lamp  800  has the airflow channels  820  respectively on its upper and lower portion and the airflow channels  820  connect the inner space of the multi-facet light emitting lamp, heat produced by the multi-facet light emitting lamp during it operation can convect through the airflow channels  820  and be conducted out of the inner space of the multi-facet light emitting lamp. Accordingly, a heat dissipation effect is achieved. 
       FIG. 16A  is a top view of a multi-facet light emitting lamp according to an embodiment of the disclosure,  FIG. 16B  is a side view of the multi-facet light emitting lamp in  FIG. 16A , and  FIG. 16C  is a cross-sectional view of the multi-facet light emitting lamp in  FIG. 16A . Referring to  FIG. 16A ,  FIG. 16B , and  FIG. 16C , the multi-facet light emitting lamp  900  in the embodiment adopts the same concept as the multi-facet light emitting lamp  600  described above. Namely, two light source plates  910  are assembled together, wherein each of the light source plates  910  has a plurality of connecting terminals T 1 , and the two light source plates  910  are connected through the connecting terminals T 1 . 
     As shown in  FIG. 16A  and  FIG. 16B , the difference between the multi-facet light emitting lamp  900  in the embodiment and the multi-facet light emitting lamp  600  illustrated in  FIG. 12  is that the connecting terminals T 1  of the two light source plates  910  are located on top and bottom of the multi-facet light emitting lamp  900 . Accordingly, the triangular pyramid structure illustrated in  FIG. 16A ,  FIG. 16B , and  FIG. 16C  can be formed by bending and connecting the two light source plates  910 . In addition, because the two light source plates are connected through the connecting terminals, the airflow channels  920  are respectively formed between two adjacent connecting terminals T 1 , as illustrated in  FIG. 16A  and  FIG. 16B . Similarly, because the multi-facet light emitting lamp  900  has the airflow channels  920  respectively on its upper and lower portions and the airflow channels  920  connect the inner space of the multi-facet light emitting lamp, heat produced by the multi-facet light emitting lamp  900  during its operation can convect through the airflow channels  920  and be conducted out of the inner space of the multi-facet light emitting lamp  900 . Accordingly, a heat dissipation effect is achieved. 
     In the embodiment, the light source plates  910  may also have a light emitting device  912 , a molding compound  914 , and a phosphor layer  916 , as illustrated in  FIG. 16C . However, the embodiment is not limited thereto, and the light source plates  910  may also adopt the light source plate structures described above. 
       FIG. 17  is a side view of a multi-facet light emitting lamp according to an embodiment of the disclosure. Referring to  FIG. 17 , and  FIG. 16B , the multi-facet light emitting lamp  900   a  in the embodiment adopts the same concept as the multi-facet light emitting lamp  900  illustrated in  FIG. 16A . However, in the multi-facet light emitting lamp  900   a  provided by the embodiment, air enters the multi-facet light emitting lamp  900   a  through the airflow channels on the top of the triangular pyramid and brings the heat produced by the multi-facet light emitting lamp  900   a  out of the multi-facet light emitting lamp  900   a  through the airflow channels at the bottom of the triangular pyramid, so that a heat dissipation effect is achieved. However, the airflow in the multi-facet light emitting lamp  900  illustrated in  FIG. 16B  has a reversed direction as that in the multi-facet light emitting lamp  900   a  provided by the embodiment. This is also based on the fact that warm air rises and cold air falls as mentioned in the embodiments described above therefore will not be described herein. 
       FIG. 18  is a front view of a multi-facet light emitting lamp according to an embodiment of the disclosure. Referring to  FIG. 18  and  FIG. 12 , the multi-facet light emitting lamp  600   a  in the embodiment adopts the same structure and concept as the multi-facet light emitting lamp  600  described above. However, the multi-facet light emitting lamp  600   a  further includes a third light source plate  680 . The third light source plate  680  also has connecting terminals T 1  for connecting adjacent light source plates  610  and  620 . Similarly, the multi-facet light emitting lamp  600   a  also has the airflow channels  630 . Besides being located at where the light source plates  610 ,  620 , and  630  adjoin each other, the airflow channels  630  may also be formed on the top of the third light source plate  680  by drilling holes. Thus, when the first light source plate  610 , the second light source plate  620 , and the third light source plate  630  are driven to produce heat, the heat convects through the airflow channels  630  and is conducted out of the multi-facet light emitting lamp  600   a . Accordingly an optimal heat dissipation effect is achieved by the multi-facet light emitting lamp  600   a.    
     It should be noted that each of foregoing light source plates uses a light emitting diode (LED) chip for emitting light. Thus, epoxy can be used to reduce the packaging cost. Or, metal substrate or conventional plastic circuit board may also be directly adopted for packaging. In addition, if pentagonal light source plates and hexagonal light source plates are used for constructing the football-like body, the number of pentagonal light source plates should be 12 and the number of hexagonal light source plates should be 20 in order to form a ball. However, some of the light source plates may be selectively removed for other purpose if the user needs to increase the number of airflow openings or install a supporting frame according to the actual requirement. 
     In summary, a multi-facet light emitting lamp in the disclosure has at least following advantages. In the multi-facet light emitting lamp provided by an embodiment, a plurality of light source plates are assembled, and a plurality of airflow channels are formed at where the light source plates adjoin each other, wherein the airflow channels connect the external space and the inner space of the multi-facet light emitting lamp. Thus, when the multi-facet light emitting lamp is driven, the heat produced by the multi-facet light emitting lamp and distributed in the inner space of the multi-facet light emitting lamp can be conducted out of the multi-facet light emitting lamp through a heat convection effect of the airflow channels. Thereby, a heat dissipation effect is achieved. 
     Additionally, because the airflow channels are distributed everywhere (the upper and lower portions) on the multi-facet light emitting lamp, based on the fact that warm air rises and cold air falls, heat produced by the light emitting devices rises towards the airflow channels on the upper portion and is conducted out of the multi-facet light emitting lamp, while fresh air of lower temperature enters the inner space from the external space through the airflow channels on the lower portion. In other words, the multi-facet light emitting lamp in the embodiment has an optimal heat convection structure such that heat can be effectively conducted out of the multi-facet light emitting lamp without adopting any conventional heat dissipating fin or cooling device. Thereby, the cost and volume of the lamp are reduced. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the disclosure cover modifications and variations of this disclosure provided they fall within the scope of the following claims and their equivalents.