Patent Publication Number: US-2011075416-A1

Title: LED illumination device having two sides illumination

Description:
FIELD OF THE INVENTION 
     The present invention relates to an LED illumination device having two sides illumination, and in particular to an LED illumination device capable of enhancing brightness of illumination. 
     DESCRIPTION OF THE RELATED ART 
     Since light emitting diodes (LEDS) feature the high brightness, power saving and long life expectancy advantages, they have been used extensively for the illumination of lamps. Several LED lamps are usually connected to form an LED lamp set, and the position of each lamp can be adjusted to achieve an illumination effect to meet the requirements for a large projecting area and a high brightness. These LED lamp sets are used as illuminating devices indoors and outdoors. However, it is necessary to plan the LED lamps and the layout of different projecting areas, so as to differentiate the projecting area for each LED lamp with a different distance from the LED lamp and the projecting area, and prevent an uneven brightness of the light projected from the LED lamps onto the projecting areas. Therefore, it is an important subject for manufacturers in the related field to design an LED lamp with good directionality and even brightness. 
     As is generally known in the art, use has been made of varying kinds of illumination lamps for lightening or illuminating objects at night or indoors. Such illumination lamps are supplied with electric energy from a power source and convert the electric energy to light energy, thereby producing a beam of light for illumination. Typical examples of the illumination lamps include a glow lamp and a fluorescent lamp. 
     Widely used in recent years is a Light Emitting Diode (LED) illumination lamp that has a benefit of providing illumination of different colors, although higher in price than the typical lamps referred to above. However, the LED illumination lamp poses a drawback in that it tends to be heated up and shows decreased efficiency when used for more than a predetermined time period. Use of the LED lamp for a prolonged period of time may result in excessive heat generation, thus shortening the life span of the lamp. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide an LED illumination device having two sides illumination capable of enhancing brightness of illumination. 
     To achieve the above-mentioned object, the present invention includes a heat sink base, two LED illumination modules and two transparent boards. The heat sink base has a first heat sink base, a second heat sink base and a connecting element connected the first heat base and second heat sink base, wherein the first heat sink base is formed with a first accommodating space, the second heat sink base is formed with a second accommodating space opposite to the first accommodating space. The two LED illumination modules are mounted on the first accommodating space and the second accommodating space of the heat sink base respectively. And the two transparent boards are mounted on the first accommodating and the second accommodating space of the heat sink base to cover the two LED illumination modules. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of an LED illumination device having two sides illumination of the present invention 
         FIG. 2  is a cross-sectional view of assembly drawing of the  FIG. 1 . 
         FIG. 3  is a schematic drawing of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 1-FIG .  3 , an LED illumination device having two sides illumination of the present invention includes a heat sink base  10  two LED illumination modules  12 , two reflecting boards  13  and two transparent boards  14 . 
     The heat sink base  10  has a first heat sink base  16 , a second heat sink base  18  and a connecting element  20  connected the first heat base  16  and second heat sink base  18 . Wherein the first heat sink base  16  is formed with a first accommodating space  22 , which is formed with two first lugs  24 , on which a first cavity  26  is formed. The second heat sink base  18  is formed with a second accommodating space  28  opposite to the first accommodating space  16 , and the second accommodating space  28  is formed with two second lugs  30 , on which a second cavity  32  is formed. The both sides of the first accommodating space  22  or the first heat sink base  16  are formed with first heat sink sheets  31  and first slots  33 . The both sides of second accommodating space  28  of the second heat sink base  18  are formed with second heat sink sheets  34  and second slots  35 . 
     The two LED illumination modules  12  are mounted on the first cavity  26  of the first accommodating space  22  and the second cavity  32  of the second accommodating space  2  of the heat sink base  10  respectively, each LED illumination module  12  has a printed circuit board  36  and LEDS arranged on the printed circuit board  36 . 
     The two reflecting boards  13 , which has a plurality of penetrated holes  40 , the reflecting boards  13  is mounted on the printed circuit board  36  of each LED illumination module, so that the LEDS may be exposed through the penetrated holes  40 . 
     The two transparent boards  14  are mounted on the first accommodating  22  and the second accommodating space  2  of the heat sink base  10  respectively to cover the two illumination modules  12 . Each transparent board  14  has an   shape, which has a top board  42  and two side boards  44  arranged at the both sides of the top board  42 , wherein the bottom end of each side board  44  is formed with guide rail  46  for guiding the slot  33  and slot  35  or the heat sink base  10 , so as to the transparent boards  14  may covered the LED illumination modules  12  respectively 
     While the present has been described by way of an example and in terms of a preferred embodiment, it is to he understood that the invention is not limited to the disclosed embodiment. To the contrary, it is intended to cover various modifications. Therefore, the scope or the appended claims should be accorded the broadest interpretation so as to encompass all such modification.