Patent Publication Number: US-2011075426-A1

Title: Led illumination device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an LED illumination device, and in particular to an LED illumination capable of assembling more easily and decreasing the cost of the manufacture. 
     2. Description of the Related Art 
     Please referring to  FIG. 1 , an explosion view of the traditional daylight lamp includes lamp tube  100  and lamp base  200 , The lamp tube  100  has a body  110  and a metal end  120 , which has an electrode connection  130 . The lamp base  200  has a lamp body  210 , electrode base  220  and a starter  230 . The electrode base  220  is arranged at the two side of the lamp body  210 , and formed with electrode hole  240 . 
     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 or 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 tamp 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 arc 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 capable of assembling easily to reduce the assembling cost. 
     An object of the present invention is to provide an LED illumination device capable of providing best heat dissipation. 
     To achieve the above-mentioned object, the present invention includes an upper lid, an LED illumination module, a lower lid and two side lids. The upper lid is formed with a top surface and a bottom surface, a plurality of dissipation holes are penetrated the top surface to the bottom surface of the upper lid. An LED illumination module is fixed at the bottom surface of the upper lid. The lower lid is covered with the bottom surface of the upper lid to encapsulate the LED illumination module, wherein the lower lid is formed with an illumination hole corresponds to the LED illumination module. And two side lids are covered at the two sides of the upper lid and the lower lid. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of a traditional daylight lamp. 
         FIG. 2  is an exploded view of LED illumination device of the present invention 
         FIG. 3A  is as assembly drawing of the  FIG. 2 . 
         FIG. 3B  is a bottom view of assembly drawing of the  FIG. 2 . 
         FIG. 4  is a cross-sectional view of the  FIG. 3A . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 2-FIG .  4 , an LED illumination device of the present invention includes an upper lid  10 , an LED illumination module  20 , lower lid  30 , two side lids  40 , two fixed sheet  50 , a voltage transformer  60  and a transparent sheet  70 . 
     The upper lid  10  is formed with top surface  10   a  and a bottom surface  10   b , a plurality of heal dissipation holes  11  are penetrated the top surface  10   a  to the bottom surface  10   b  of the upper lid  10 . 
     The LED illumination module  20  is fixed at the bottom surface  10   b  of the upper lid  10 , in the preferred embodiment, the LED illumination module  20  has a heat sink  21 , which is fixed at the bottom surface  10   b  of the upper lid  10  through the two fixed sheet  50 . 
     The fixed sheet  50  has a first portion  51 , which is fixed at the upper lid  10  and a second portion  52 , which is fixed at the heat sink  21  of the LED illumination module  20 , the first portion  51  of the fixed sheet  50  is connected to the second portion  52  of the fixed sheet through the third portion  53 . 
     The lower lid  30  is covered with the bottom surface  10   b  of the upper lid  10  to encapsulate the LED illumination module  20 , wherein the lower lid  30  is formed with a illumination hole  31  correspond to the LED illumination module  20 ; 
     The two side lids  40  are covered at the two sides of the upper lid  10  and the lower lid  30 . 
     The voltage transformer  60  is arranged at the bottom surface  11   b  of the upper lid  10  to electrically connect the LED illumination module  20 . And 
     The transparent sheet  70  is arranged at the illumination hole  31  of the lower lid  30 . 
     Therefore, according to the above-mentioned structure, after the LED illumination device has been assembled, the LED illumination module may efficient heat dissipation through the heat sink  21  and heat dissipation holes  11  of the upper lid  10 , and may through light by the illumination hole  31 . 
     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 of the appended claims should be accorded the broadest interpretation so as to encompass all such modification.