Abstract:
A heat dissipating device for LED light-emitting module, which embodies: A heat dissipating unit; An LED light-emitting module, in which light emitting diode are connected to a baseplate; A heat dissipating base; The heat dissipating base and the heat dissipating unit are mutually fixedly joined to form an integrated body, and the heat conducting layer is used to uniformly and efficiently transmit heat from the baseplate to the heat dissipating base, whereupon the heat dissipating base then transmits the heat to the heat dissipating unit. Accordingly, the quick and effective direct heat conduction of the heat conducting layer is used to conduct away and dissipate the high temperature produced by the LED, thereby extending serviceable life and improving stability and luminous efficiency of the LED, thus increasing heat dissipation efficiency of the entire LED light-emitting module.

Description:
BACKGROUND OF THE INVENTION 
     (a) Field of the Invention 
     The present invention provides a heat dissipating device for LED light-emitting module, and more particularly provides an LED light-emitting module that effectively increases heat dissipation efficiency. 
     (b) Description of the Prior Art 
     A typical example of an LED light-emitting module of prior art is disclosed in Taiwan patent number M297441, entitled “LED projection light source module”, long term use of which leads to the appearance of the following defects: 
     1. Because the LED unit is in contact coordination within the holding space of the main body, thus, it is impossible for gaps not to appear in the interface between the two component members. For example, pores, machining tool marks and flatness leveling can be seen in the connecting contact surfaces when microscopically inspected. Hence, heat conduction efficiency of the LED unit to the main body is poor. 
     2. Because the main body is extruded and embedded within the through hole defined center of the heat dissipating unit, thus, the extrusion contact of the main body makes it difficult for the peripheral surface of the main body to be in complete linear contact with the contact surface of the heat dissipating unit, resulting in the production of microscopic pores, machining tool marks and flatness leveling on the peripheral surface of the main body, which cause the main body to be unable to effectively transmit heat to the fins. Moreover, if there is an inaccuracy in linear cross section of the fins in the through hole of the main body, for example, if only one of the fins is askew, then the linear cross section is unable to make effective contact with the peripheral surface of the main body, and efficiency of heat conduction is greatly affected. 
     3. Because the outer surface of the heat dissipating unit assembled from the plurality of radially arranged fins lacks any fixing device, thus, the entire assembly of fins is easily deformed if the heat dissipating unit is subjected to impact (such as falling to the ground), which can further cause a loose fit between the peripheral surface of the main body and linear cross section of a portion of the fins, leading to ineffective heat conduction. 
     4. When the LED unit is emitting light, there is no control of the transmission of light waves therefrom, and it is difficult for a designer to control lighting of the area being illuminated. For example, if it has been requested to provide focused light beams or dispersed light for an illuminated place, the LED unit does not provide for effective control of the emitted light. 
     In light of the aforementioned defects of prior art, subject of the present invention is to improve heat dissipation efficiency and heat dissipation stability of a LED light-emitting module. 
     SUMMARY OF THE INVENTION 
     A primary objective of the present invention is to provide a heat dissipating device for LED light-emitting module which uses a heat conducting layer bonded between a bottom surface of an LED light-emitting baseplate and a heat dissipating base to enable effectively conducting heat away from the LED light-emitting baseplate to the heat dissipating base, thereby improving heat dissipation efficiency of the LED light-emitting module. 
     Another objective of the present invention is to provide the heat dissipating device for LED light-emitting module with a heat dissipating unit provided with a cavity configured center thereof having a form corresponding with the heat dissipating base, wherein the cavity is provided with a linear cavity side wall and a linear horizontal cavity wall. A peripheral surface of the heat sink is soldered to the linear cavity side wall, and a bottom surface of the heat dissipating base is soldered to the linear horizontal cavity wall, thereby enabling the heat dissipating base to effectively and steadily conduct heat to the heat dissipating unit. 
     Yet another objective of the present invention is to provide the heat dissipating device for LED light-emitting module with an outer annular member joined to an outer peripheral edge of the heat dissipating unit, thereby increasing strength of the heat dissipating unit to endure external forces. 
     Yet another objective of the present invention is to increase the number of fins, thereby increasing heat dissipating area, and increasing area of contact between the heat dissipating fins and air to achieve better heat dissipation effectiveness. In addition, provide the heat dissipating device for LED light-emitting module with a lens connected to an upper portion of the LED light-emitting module to control focusing or defocusing of the light spectrum emitted therefrom. 
     To enable a further understanding of said objectives and the technological methods of the invention herein, a brief description of the drawings is provided below followed by a detailed description of the preferred embodiments. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an exploded elevational view depicting component members of the present invention. 
         FIG. 2  shows a cross sectional view of a heat dissipating unit according to the present invention. 
         FIG. 3  shows another exploded elevational view depicting the component members of the present invention. 
         FIG. 4  shows a longitudinal cross sectional view of the present invention. 
         FIG. 5  shows an elevational view of the present invention. 
         FIG. 6  shows a partial enlarged view depicting joining of a baseplate and a heat dissipating base using a heat conducting layer of the present invention. 
         FIG. 7  shows another partial enlarged view depicting joining of the baseplate and the heat dissipating base using a heat conducting layer of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIGS. 1 ,  2  and  3 , which show the heat dissipating device for LED light-emitting module of the present invention, comprising: a plurality of fins  12  configured in a radial arrangement, a composite mutual soldering of which forms a heat dissipating unit  10 . A cavity  14  enabling soldering thereto is configured center of the heat dissipating unit  10 , and a through hole  141  is defined center of the cavity  14 . A cavity side wall  142  of the cavity  14  forms a linear side wall, and a bottom portion of the cavity  14  forms a linear cavity wall  143 , wherein linearity refers to the rectilinear form of the sides of the walls formed by the plurality of fins  12 . An LED light-emitting module  30  (as depicted in  FIG. 3 ) comprises at least more than one light-emitting crystal  32  connected to a baseplate  34 . A heat dissipating base  40  is provided with a holding space  42 , and a heat conducting layer  60  is packed and joined to a bottom surface  421  of the holding space  42 . A bottom surface  341  of the baseplate  34  is packed and joined to a surface of the heat conducting layer  60  (as depicted in  FIG. 1 ). An outer surface  44  of a bottom portion of the heat dissipating base  40  is soldered to the linear horizontal cavity wall  143 , and an outer peripheral surface  43  of the heat dissipating base  40  is soldered to the linear cavity side wall  142  (as depicted in  FIG. 4 ). 
     An outer surface of the heat dissipating unit  10  assumes a conical form, and an outer annular member  111  is joined to a peripheral edge  11  of the greatest outer diameter of the heat dissipating unit  10 , 
     A lens  65  is fitted to an upper portion of the baseplate  34 , and the lens  65  is configured with a convex shaped or concave shaped surface  62 . A peripheral edge  64  of the lens  65  is disposed within a peripheral groove of the cavity  14 . The cavity side wall  142  of the cavity  14  is inclined to form a conical form, and the outer peripheral surface  43  of the heat dissipating base  40  assumes a conical form, The outer peripheral surface  43  is soldered to the cavity side wall  142  (as depicted in  FIG. 4 ). 
     A through hole  422  is defined center of a bottom portion of the heat dissipating base  40 . 
     A through hole  601  is defined center of the heat conducting layer  60 , and the two through holes  422 ,  601  mutually correspond, thereby enabling an electric connector  342  of the baseplate  34  to pass through the through holes  601 ,  422 . 
     A power supply  70  is disposed within a holding cavity  53  interior of a lamp base  50 , and an electrical conducting wire  71  of the power supply  70  externally connects to a connector  72 . The connector  72  plugs into the connector  342  of the baseplate  34 . 
     A bottom end of a sleeve  90  is joined to a base plate  92 , and the sleeve  90  penetrates the through hole  141  of the heat dissipating unit  10 . Clasp protruding pieces  921  are respectively located on two sides of the base plate  92 , and a fixed disk  75  is fixedly joined to an upper plate  74 . The clasp protruding pieces  921  of the base plate  92  are clasped within annular grooves  521  predefined in a lower edge of an open end  52  of the lamp base  50  (as depicted in  FIG. 3 ). 
     A bottom connecting portion  15  of a horizontal cross section of a lower end of the heat dissipating unit  10  is fixedly joined to a surface of the base plate  92  (as depicted in  FIG. 4 ). 
     The baseplate  34  depicted in  FIG. 1  can be fabricated from aluminum, copper, quartz or ceramic material. 
     The heat conducting layer  60  depicted in  FIG. 1  can use carbon fiber powder  66  material. 
     Referring to  FIG. 1 , wherein soldering art is used to solder an outer surface  44  of a bottom portion of a heat dissipating base  40  to a horizontal cavity wall  143 , thereby enabling the heat dissipating base  40  to make a firm contact and connection with the horizontal cavity wall  143  (as depicted in  FIG. 4 ). An outer peripheral surface  43  of the heat dissipating base  40  is soldered to a linear cavity side wall  142 , thereby joining the heat dissipating base  40  to the linear cavity side wall  142 , and joining the entire heat dissipating base  40  within a cavity  14 . Accordingly, the heat dissipating base  40  is able to effectively transmit heat to a plurality of fins  12 , thereby providing reliable and improved heat dissipation effectiveness. 
     A heat conducting layer  60  can be a solid state piece or gel form, and adhesion of the heat conducting layer  60  is used to attach to a bottom surface  341  of a baseplate  34  and be fixed to a bottom surface  421  of a holding space  42  (as depicted in  FIG. 1 ). The baseplate  34  is manufactured from quartz material, and because “quartz” is provided with high heat conducting characteristics, thus, heat dissipation efficiency of the entire baseplate  34  is increased. The heat conducting layer  60  has carbon fiber powder  66  material added thereto, which enables heat from the baseplate  34  to be uniformly conducted to the heat dissipating base  40 . Because the heat conducting layer  60  is uniformly adhered to the bottom surfaces  341 ,  421 , thus, a uniform joining of microscopic pores, machining tool marks and flatness leveling of the bottom surfaces  341 ,  421  is able to be effected with the heat conducting layer  60 , thereby increasing heat dissipation efficiency. When diode  32  are subjected to an electrical effect and are emitting light, then the high heat produced is quickly directly transmitted to the heat dissipating base  40  through the heat conducting layer  60 , whereupon the heat dissipating unit  40  further transmits the heat to a heat dissipating unit  10 , where the heat is dissipated. Hence, high temperature of the diode  32  produced when emitting light is quickly dissipated, thereby extending serviceable life of the diode  32 . 
     Referring to  FIGS. 4 and 5 , a lens  65  is configured with a convex shape or concave shape, thereby focusing or defocusing the light spectrum emitted by the diode  32  so as to enable adjusting the angle of the LED light-emitting spectrum, and adjust luminance and softness of the light, and thus providing the user with choice of use. An outer annular member  111  is clasped to a peripheral edge  11  of the heat dissipating unit  10 , which further fixedly secures the heat dissipating unit  10 . Should the heat dissipating unit  10  be subjected to an external force or impact, then protection by the outer annular member  111  prevents deformation of the fins  12 . 
     A connector  72  passes through a through hole of a sleeve  90 , and connects with another connector  342 , thereby enabling a quick and convenient electric connection therebetween. Moreover, the electrical connection between the two connectors  342 ,  72  is provided with directional connection, which is able to prevent misapplication by users reverse connecting the connectors  342 ,  72   
     A screw connection  56  at a rear end of a lamp base  50  is screw connected to an outside electric outlet (not shown in the drawings), and after the acquired power source has passed through a power supply  70  and undergone rectification/voltage transformation, output of an appropriate voltage/electric current is supplied to the baseplate  34  and the diode  32  through the connectors  342 ,  72  for use thereof. 
     Referring to  FIGS. 4 and 5 , an upper plate  74 , the power supply  70 , a fixed disk  75  and a base plate  92  are fixed within a holding cavity  53 , and the sleeve  90  penetrates a through hole  141 . Clasp protruding pieces  921  are rotated and clasped within annular grooves  521  slightly below an open end  52  (see  FIGS. 1 and 4 ), thereby enabling the base plate  92  and the sleeve  90  to be fixed within the lamp base  50 . A horizontal cross section of a bottom portion of the heat dissipating unit  10  serves as a bottom connecting portion  15 , which is soldered and fixedly joined to the surface of the base plate  92  to form an integrated body, Accordingly, once the base plate  92  has been firmly fixed to the lamp base  50 , then the heat dissipating unit  10  has at the same time been fixed to the lamp base  50 . Hence, because the heat dissipating base  40  is fixed within the cavity  14  of the heat dissipating unit  10 , and at the same time the heat dissipating unit  10  is firmly fixed to the lamp base  50 , thus, the heat dissipating unit  10  will not easily become loose or come apart when subjected to external forces. 
     Referring to  FIG. 6 , carbon fiber powder  66  can be chosen as the material for the heat conducting layer  60 , and each molecule of the carbon fiber powder  66  manufactured using a nanometer manufacturing process is 10 −6  mm in size. Microscopic inspection of the bottom surface  341  of the baseplate  34  reveals uneven pores  343 , and microscopic inspection of the bottom surface  421  of the heat dissipating base  40  reveals uneven pores  423 . The nanometered carbon fiber powder  66  particles can effectively fill the pores  423 ,  343 , machining tool marks and flatness leveling, thereby achieving increasing high heat conduction efficiency. 
     Referring to  FIG. 7 , if the baseplate  34  and the heat dissipating base  40  have undergone machining through the use of machine tools, for example, machining through the use of milling cutters and planing tools, then, microscopic inspection of the machined surfaces reveals uneven tool marked surfaces  35 ,  45 , or the existence of a non-horizontal plane machined surface. However, packing the heat conducting layer  60  into the gap between the tool marked surfaces  35 ,  45  enables the carbon fiber powder  66  to completely fill the gap between the uneven tool marked surfaces  35 ,  45 , thereby further increasing heat conduction effectiveness of the baseplate  34  and the heat dissipating base  40 . 
     In conclusion, effectiveness of the characteristics of the present invention has been singularly achieved, thus providing the present invention with originality and advancement. Accordingly, a new patent application is proposed herein. 
     It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.