Patent Publication Number: US-2011063833-A1

Title: Led lamp with double faces illumination

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an LED lamp with double faces illumination, and in particular to an LED lamp capable of assembling easily and decreasing the cost of the manufacture. 
     2. 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 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. 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 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 tamp 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. 
     Please refer to  FIG. 1 , an exploded view of the traditional daylight lamp includes lamp tube  10  and lamp base  20 . The lamp tube  10  has a body  11  and a metal end  12 , which has an electrode connection  13 . The lamp base  20  has a lamp body  21 , electrode base  22  and a starter  23 . The electrode base  22  is arranged at the both side of the lamp body, and formed with electrode hole  24 . 
     Please refer to  FIG. 2A , a traditional LED lamp tube includes a core tube  31 , a lamp shade  32 , a print circuit board  33  and LED  34 . Above-mention LED lamp has a single illumination face only, so as to the traditional LED lamp can not provide double faces illumination. 
     Please refer to  FIG. 2B , it is a double faces illumination lamp  40 , which has a heat sink  41  and light source  42  mounted at the two sides of the heat sink  41 . 
     SUMMARY OF THE INVENTION 
     The present invention discloses an LED lamp with double faces illumination may be resolved aforementioned questions. 
     An object of the present invention is to provide an LED lamp with double faces illumination capable of assembling easily to reduce the assembling cost. 
     An object of the present invention is to provide an LED lamp with double faces illumination capable of providing best heat dissipation. 
     To achieve the above-mentioned object, the present invention comprises a heat sink, two LED illumination modules and two lamp shades. The heat sink has a first surface, which has a first accommodating space and a second surface, which has a second accommodating space, the first accommodating space is formed with two first guide rails relatively on both sides of first accommodating space, the second accommodating space is formed with two second guide rails relatively on both sides of second accommodating space. The two LED illumination modules are arranged at the first accommodating space and the second accommodating space of the heat sink individually. And the two lamp shades are mounted on the first accommodating space and the second accommodating space individually to cover the two LED illumination modules. 
     However, the lamp shades may be assembly in the first surface and the second surface of the heat sink easily to cover the two LED illumination modules. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of a traditional daylight lamp. 
         FIG. 2A  is an assembly drawing of a traditional LED lamp. 
         FIG. 2B  is a cross-sectional view of a traditional LED lamp with double faces illumination 
         FIG. 3  is an exploded view of LED lamp with double faces illumination of the present invention 
         FIG. 4  is an assembly drawing of the  FIG. 3 . 
         FIG. 5  is an illustrated schematic of the  FIG. 3 . 
         FIG. 6  is a cross-sectional view of the  FIG. 4 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 3-FIG .  6 , an LED lamp with double faces illumination of the present invention includes a heat sink  100 , two LED illumination modules  200 , two side covers  400 , two reflecting plate  210  and two lamp shades  300 . 
     The heat sink  100  has a first surface  110 , which has a first accommodating space  112  and a second surface  120 , which has a second accommodating space  122 , the first accommodating space  112  is formed with two first guide rails  111  relatively on both sides of first accommodating space, the second accommodating space  122  is formed with two second guide rails  121  relatively on both sides of second accommodating space. 
     The two LED illumination modules  200  are arranged at the first accommodating space  112  and the second accommodating space  122  of the heat sink  100  separately. Wherein each LED illumination modules  200  include a print circuit board  201  and LEDS  202  formed on the print circuit board  201 . 
     The reflecting plate  210  is formed with holes  211  relatively the LED  202  and mounted on the print circuit board  201 , so as to each LED  202  may be exposed through the holes  211  of the reflecting plate  210 . 
     The each side cover  400  has fixed holes  401 , which are screwed at both side of the heat sink  100  by screwed elements  500  to cover the LED illumination modules  200 . 
     The two lamp shades  300  are mounted on the first accommodating space  112  and the second corresponding space  122  of the heat sink  100  individually through the first rails  111  and the second guide rails  121  to cover the two LED illumination modules  220 , so as to the lamp  300  may be covered. 
     While the present invention has been described by way of an example and in terms of a preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment. To the contrary, it is intended to cover various modifications. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modification.