Patent Publication Number: US-9429306-B2

Title: DC LED module having bridge rectifying and filtering function

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a direct current light emitting diode module (hereinafter referred as a DC LED module), especially to a DC LED module having bridge rectifying and filtering function. 
     2. Description of Related Art 
     A conventional DC LED module is often installed with a rectifying and filtering circuit in a housing for converting an AC voltage into a DC voltage so as to supply electric power to a LED load, wherein the rectifying and filtering circuit includes a bridge rectifier and a filtering capacitor. In addition, for being combined with a reflection cup, one surface of the housing is formed with a reflection cup accommodating concave surface. 
     However, because the installation of the bridge rectifier and the filtering capacitor would cause the depth of the reflection cup accommodating concave surface of the DC LED module to be increased, so a mechanical interference may be generated between a reflection cup having a larger dimension and the reflection cup accommodating concave surface thereby not allowing the reflection cup to be combined with the DC LED module. 
     In view of the above-mentioned disadvantages, a novel DC LED module shall be invented. 
     SUMMARY OF THE INVENTION 
     One primary objective of the present invention is to provide a DC LED module having bridge rectifying and filtering function, in which a bridge rectifying and filtering member is installed for converting an AC voltage into a DC voltage so as to drive a LED load. 
     Another objective of the present invention is to provide a DC LED module having bridge rectifying and filtering function, in which a bridge rectifying and filtering member is disposed at the exterior of an insulation seat thereby enabling the insulation seat to be formed in a small thickness, so the small-thickness insulation seat is able to accommodate a reflection cup having various dimensions 
     For achieving said objectives, the present invention provides a DC LED module having bridge rectifying and filtering function, which includes:
         an insulation seat, formed with a first surface and a second surface, wherein a concave area is formed on the first surface, and an opening and at least one buckle slot are formed at a substantially central portion of the concave area;   a reflection cup, formed with at least one buckle structure for being buckled with the at least one buckle slot of the insulation seat;   a circuit board, installed with an LED light source, wherein the circuit board is fastened on the second surface of the insulation seat, and the LED light source is aligned with the opening; and   a bridge rectifying and filtering member, disposed at the exterior of the insulation seat and electrically coupled to a power input port of the circuit board for providing a DC voltage to the circuit board.       

     According to one embodiment of the present invention, the at least one buckle structure of the reflection cup is buckled with the at least one buckle slot of the insulation seat with a rotating means. 
     According to one embodiment of the present invention, the bridge rectifying and filtering member includes a bridge diode rectifier circuit and a filtering capacitor. 
     According to one embodiment of the present invention, the DC LED module having bridge rectifying and filtering function further includes a heat dissipation base which is in contact with one surface of the circuit board. 
     According to one embodiment of the present invention, the heat dissipation base is made of an aluminum substrate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which: 
         FIG. 1  is an exploded view illustrating a DC LED module having bridge rectifying and filtering function according to one embodiment of the present invention; 
         FIG. 2  is a schematic view illustrating the assembly of the DC LED module having bridge rectifying and filtering function according to one embodiment of the present invention; 
         FIG. 3  is a schematic view illustrating the assembly of the DC LED module having bridge rectifying and filtering function of  FIG. 2  in which a reflection cup not being combined according to one embodiment of the present invention; and 
         FIG. 4 a    to  FIG. 4 c    are cross sectional views illustrating the DC LED module having bridge rectifying and filtering function being respectively combined with a reflection cup having three different dimensions. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1 , which is an exploded view illustrating a DC LED module having bridge rectifying and filtering function according to one embodiment of the present invention. As shown in  FIG. 1 , the DC LED module having bridge rectifying and filtering function includes an insulation seat  100 , a circuit board  110 , a bridge rectifying and filtering member  120 , a reflection cup  130  and a heat dissipation base  140 . 
     The insulation seat  100  is formed with a first surface and a second surface, wherein a concave area  101  is formed on the first surface, and an opening  101   a  and at least one buckle slot  101   b  are formed at a substantially central portion of the concave area  101 . 
     The circuit board  110  is installed with an LED light source  111 , wherein the circuit board  110  is fastened on the second surface of the insulation seat  100 , and the LED light source  111  is able to be aligned with the opening  101   a  when the circuit board  110  is combined with the insulation seat  100 . 
     The bridge rectifying and filtering member  120  is electrically coupled to a power input port of the circuit board  110  for providing a DC voltage to the circuit board  110 . The bridge rectifying and filtering member  120  includes a bridge diode rectifier circuit and a filtering capacitor (not shown in figures), wherein the bridge diode rectifier circuit is served to convert an AC voltage into a full-wave rectifying voltage, and the filtering capacitor is served to filter the AC portion of the full-wave rectifying voltage. 
     The reflection cup  130  is served to define an illuminating direction and formed with at least one buckle structure  131 . The at least one buckle structure  131  is buckle with the at least one buckle slot  101   b  of the insulation seat  100  with a rotating means, thereby enabling the reflection cup  130  to be combined with the insulation seat  100 . What shall be addressed is that the opened portion of the reflection cup  130  can be formed in different dimensions. 
     The heat dissipation base  140  can be made of an aluminum substrate and in contact with one surface of the circuit board  110  for providing a heat dissipation function. 
     Referring to  FIG. 2  and  FIG. 3 , wherein  FIG. 2  is a schematic view illustrating the assembly of the DC LED module having bridge rectifying and filtering function according to one embodiment of the present invention; and  FIG. 3  is a schematic view illustrating the assembly of the DC LED module having bridge rectifying and filtering function of  FIG. 2  in which a reflection cup not being combined according to one embodiment of the present invention. As shown in  FIG. 2 , the bridge rectifying and filtering member  120  of the DC LED module having bridge rectifying and filtering function is disposed at the exterior of the insulation seat  100  for converting an AC voltage into a DC voltage. Because the bridge rectifying and filtering member  120  is disposed at the exterior of the insulation seat  100 , the height of the above-mentioned concave area  101  of the insulation seat  100  can still be minimized thereby preventing a mechanical interference from being generated between the reflection cup  130  and the above-mentioned concave area  101 , so the reflection cup  130  is enabled to be formed in various dimensions and still can be accommodated. Referring from  FIG. 4 a    to  FIG. 4 c   , which are cross sectional views illustrating the DC LED module having bridge rectifying and filtering function being respectively combined with the reflection cup having three different dimensions. 
     Based on what has been disclosed above, advantages achieved by the present invention are as followings:
         1. The DC LED module having bridge rectifying and filtering function provided by the present invention is installed with the bridge rectifying and filtering member for converting an AC voltage into a DC voltage so as to drive a LED load.   2. The DC LED module having bridge rectifying and filtering function provided by the present invention allows the bridge rectifying and filtering member to be disposed at the exterior of the insulation seat thereby enabling the insulation seat to be formed in a small thickness, so the small-thickness insulation seat is able to accommodate the reflection cup having various dimensions.       

     Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific examples of the embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.