Patent Publication Number: US-2010124054-A1

Title: Light-emitting diode lamp

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a LED lamp, and more particularly to a LED lamp whose emission board and power supply unit can be replaced respectively. 
     2. Description of the Prior Art 
     Light is an indispensible necessity for today&#39;s life, without it, many activities cannot be successfully carried out. Although conventional common tungsten-filament lamps are convenient and inexpensive in use, most of the power consumed by the tungsten-filament lamps is used to generate heat but not emit light, thus causing waste of electric energy. With the development of technology, energy-saving light-emitting diodes have been applied in the illumination field. The light-emitting diode not only has the advantages of small volume and rapid respond speed but also has the advantage of saving energy. 
     Referring to  FIG. 1 , a conventional LED lamp as disclosed in Taiwan Patent No. M326122 comprises an emission board  10  accommodated in a light-transmittable tube  20 . Both ends of the light-transmittable tube  20  are connected to a pair of connectors  30  which can be inserted into a lamp holder. The emission board  10  includes a base board  11  which is provided with plural light-emitting diodes  12  and a power supply unit  13 . After rectifying and transforming the received AC power, the power supply unit  13  will supply the rectified and transformed power to the lamp holder to enable the light-emitting diodes  12  to emit light. The plural light-emitting diodes  12  and the power supply unit  13  are inlaid in the base board  11 . The connectors  30  of such a conventional LED lamp is not disconnectable, so that when the light-emitting diodes  12  or the power supply unit  13  on the base board  11  is damaged, the whole lamp must be replaced with a new one, thus not satisfying the requirements of environmental protection and energy-saving. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a LED lamp which has replaceable components to make the best use of everything, thus achieving advantage of energy-saving. 
     In order to achieve the above objective, a LED lamp in accordance with the present invention comprises an emission board, a tube body, a power supply unit and two connectors. The emission board includes a base board provided with plural light-emitting diodes and accommodated in the tube body. The two connectors are a first connector and a second connector which are connected to two ends of the tube body, respectively. The power supply unit is accommodated in the second connector and connected to the emission board and the second connector. The respective connectors include two inserting electrodes to be inserted into a lamp holder. After transforming and rectifying the inputted AC power, the power supply unit will supply the transformed and rectified power to the light-emitting diodes on the emission board to enable light-emitting diodes to emit light. When the emission board or the power supply unit is damaged, the damaged emission board, power supply unit or the respective components can be replaced with a new one, thus making the best use of ever thing and achieving the advantage of energy-saving. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a conventional LED lamp; 
         FIG. 2  is an exploded view of a LED lamp in accordance with a first embodiment of the present invention; 
         FIG. 3  is an assembly view of the LED lamp in accordance with the first embodiment of the present invention; 
         FIG. 4  illustrates the use state of the LED lamp in accordance with the first embodiment of the present invention; 
         FIG. 5  is an exploded view of a LED lamp in accordance with a second embodiment of the present invention; and 
         FIG. 6  is an assembly view of the LED lamp in accordance with the second embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention. 
     Referring to  FIGS. 2-3 , a light-emitting diode (LED) lamp in accordance with a first embodiment of the present invention comprises an emission board  40 , a tube body  50 , two connectors  60  and a power supply unit  70 . 
     The emission board  40  includes a base board  41  provided with plural light-emitting diodes  42 . 
     The tube body  50  is light-transmittable and provided for accommodation of the emission board  40 . 
     The two connectors  60  are a first connector  60   a  and a second connector  60   b.  The two connectors  60  are connected to two ends of the tube body  50 , respectively. Each of the connectors  60  includes an inserting end  61  and an assembling end  62 . Each of the inserting ends  61  includes two inserting electrodes  611 . Each of the assembling ends  62  includes an assembling space  621  and two axial grooves  622 . The tube body  50  is mounted on the assembling end  62  of the respective connectors  60 , and the emission board  40  is engaged in the axial grooves  622  of the assembling end  62  of the respective connectors  60 . The second connector  60   b  is further provided with a containing portion  63  between the inserting end  61  and the assembling end  62  thereof. The containing portion  63  includes a containing space  631 . 
     The power supply unit  70  is accommodated in the containing space  631  of the containing portion  63  of the second connector  60   b.  The power supply unit  70  is electrically connected to the second connector  60   b  and the emission board  40 , respectively. After transforming and rectifying the inputted AC power, the power supply unit  70  will supply the transformed and rectified power to the light-emitting diodes  42  on the emission board  40 . 
     As shown in  FIG. 4 , the LED lamp of the present invention is assembled to a lamp holder  80  through the inserting electrodes  611  of the respective connectors  60 , and the lamp holder  50  can supply the AC power to the LED lamp. When the AC power passes through the second connector  60   b  of the LED lamp, the power supply unit  70  in the second connector  60   b  will transform and rectify the inputted AC power and then supply the transformed and rectified power through the emission board  40  to enable the light-emitting diodes  42  to emit light. Since the light-emitting diodes  42  have the advantages such as low power consumption, long service life, without idling time and rapid respond speed, the LED lamps can greatly reduce the required power consumption, thus satisfying the environment protection requirements. The power supply unit  70  and the emission board  40  are separately provided on the lamp, so that when the power supply unit  70  or the emission board  40  or even the respective components are damaged, the damaged power supply unit  70  or the emission board  40  and the respective components can be replaced, thus avoiding of replacing the whole lamp. Furthermore, the power supply unit  70  can also be directly fixed in one of the connectors  60 , so that if the power supply unit  70  is to be replaced, it can be replaced conveniently by replacing the connector  60 . 
     In addition, referring to  FIGS. 5-6 , a LED lamp in accordance with a second embodiment of the present invention is further provided with an adaptor  90  between the power supply unit  70  and the emission board  40 . The adaptor  90  is provided with a connecting portion at each of two opposite sides thereof. The connectors  60 , the emission board  40  and the power supply unit  70  each include a connecting portion  100 . The connecting portions  100  include oppositely arranged male and female connecting portions which are engaged to each other. The respective components of the lamp in accordance with the present invention can utilize the respective connecting portions  100  to achieve the function of quick replacement. The arrangement of the adaptor  90  makes the replacement of the power supply unit  70  or the emission board  40  more convenient. 
     While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.