Abstract:
A portable light emitting diode (LED) lamp is disclosed. The light emitting diode (LED) lamp, the LED lamp comprises a main body; a first LED module arranged at a first end of the main body; a holder arranged at a second end of the main body; and a second LED module pivotally connected to the holder.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to a light emitting diode (LED) device, and particularly to a portable LED lamp as a reading lamp or a flashlight. 
         [0003]    2. Discussion of Related Art 
         [0004]    Light emitting diodes&#39; (LEDs) have many advantages, such as high luminosity, low operational voltage, low power consumption, compatibility with integrated circuits, easy driving, long term reliability, and environmental friendliness. These advantages have promoted a wide use of LEDs as lighting sources. 
         [0005]    However, conventional LED lamps may only have a single function, such as a flashlight, or as a reading light. Users need different types of lamps for different functions, which may be costly. 
         [0006]    Therefore, what is needed is an LED lamp which can overcome the described limitations. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views. 
           [0008]      FIG. 1  is an assembled view of an LED lamp in a first state in accordance with an embodiment of the present disclosure. 
           [0009]      FIG. 2  is a cross-sectional view of the LED lamp of  FIG. 1 , taken along line II-II thereof. 
           [0010]      FIG. 3  is an assembled view of the LED lamp of  FIG. 1 , but in a second state. 
           [0011]      FIG. 4  is an assembled view of the LED lamp of  FIG. 1 , but in a third state. 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0012]    Referring to the  FIGS. 1-2 , an LED lamp  100 , in accordance with an embodiment is shown. The LED lamp  100  may comprise a main body  10  having a first end and a second end, a first LED module  20  fixed to the first end, a holder  30  mounted on the second end, and a second LED module  40  pivotally connected to the holder  30 . 
         [0013]    The main body  10  is elongated and has a rectangular cross section. The main body  10  includes a first surface  11 , a second surface  12  opposite to the first surface  11 , and an end surface  13  connecting rear ends of the first surface  11  and the second surface  12 . The main body  10  is hollow and defines a chamber  101  therein. The main body  10  defines a first opening  14  at the first end. The first surface  11  defines a first window  111  at a central portion thereof. The second surface  12  defines a second window  121  at a central portion thereof. The third surface  13  defines a slot  131  at a center thereof. The first window  111 , the second window  121 , and the slot  131  are interconnected with the chamber  101 . 
         [0014]    The first LED module  20  includes a lampshade  21 , a supporting board  22 , a plurality of LEDs  23  arranged on the supporting board  22 , and a lens  24 . 
         [0015]    The lampshade  21  is hollow cone-shaped, and defines a second opening  211  and a third opening  212  at two opposite ends thereof. The third opening  212  is larger than that of second opening  211 . The second opening  211  is the same as the first opening  14  of the main body  10  in size and shape. The lampshade  21  of the first LED module  20  is connected to the first end of the main body  10 , and the first opening  14  of the main body  10  is interconnected with the second opening  211  of the lampshade  21 . 
         [0016]    The supporting board  22  is received in the lampshade  21 . In the present embodiment, the supporting board  22  is transparent and made of glass. The supporting board  22  is fixed on an inner wall of the lampshade  21 . The plurality of LEDs  23  are arranged on a same side of the supporting board  22  and opposite to the lens  24 . The lens  24  covers the third opening  212  of the lampshade  21 . 
         [0017]    The holder  30  is moveably engaged with the third end surface  13  of the main body  10 . In the present embodiment, the holder  30  includes a rectangular base  31  and an elongated rectangular substrate  32  extending from the base  31 . The elongated rectangular substrate  32  is made of metallic material with a high light reflectivity, and includes a first reflective surface  321  facing the second window  121 , and a second reflective surface  322  facing the first window  111 . A reflective area of the first reflective surface  321  is larger than an area of the second window  121 , and a reflective area of the second reflective surface  322  is larger than an area of the first window  111 . The elongated rectangular substrate  32  is inserted into the chamber  101  of the main body  10  through the slot  131 , and may be telescopically moved along an axial direction of the main body  10 . 
         [0018]    The second LED module  40  is pivotally connected to the holder  30 . The second LED module  40  includes two planar plates  41  and a plurality of second LEDs  42  arranged on the two planar plates  41 . The two planar plates  41  are pivotally connected to two sides of the holder  30 , and may be rotated to attach to or detach from the main body  10 . 
         [0019]    As shown in  FIG. 1 , the LED lamp  100  is at a first state, functioning as flashlight. In the first state, the two planar plates  41  are rotated to overlap with the first surface  11  and the second surface  12 . The first window  111  and the second window  121  are covered in the first state. The plurality of second LEDs  42  are received in the first and second windows  111 ,  121 , facing the first reflective surface  321  and the second reflective surface  322 . Light emitted from the plurality of second LEDs  42  is reflected by the elongated rectangular substrate  32  on the first reflective surface  321  and the second reflective surface  322 , and then travels through the lens  24  to provide illumination. Light emitted from the plurality of LEDs  23  of the first LED module  10  also travels through the lens  24  to provide additional illumination. It should be understood that, either the first LED module  20  or the second LED module  40  alone may provide enough light intensity. It is not necessary to turn on both the first LED module  20  and the second LED module  40  for the LED lamp  100  to function as a flashlight according to the present disclosure. 
         [0020]    Referring to the  FIG. 3 , wherein the LED lamp  100  is changed from the first state to a second state, functioning as first reading light. In the second state, the two planar plates  41  are rotated out away from the main body  10  and upwardly relative to the rectangular base  31 . Each of the two planar plates  41  and the corresponding first surface  11  or the second surface  12  of the main body  10  cooperatively form an obtuse angle therebetween. In the second a state when the LED lamp  100  functions as a first reading light, only the plurality of second LEDs  42  of the second LED module  40  provide light, and the first LED module  20  may be turned off. 
         [0021]    Referring to the  FIG. 4 , wherein the LED lamp  110  is in a third state, functioning as a second reading light. In  FIG. 4 , the elongated rectangular substrate  32  of the holder  30  is partially drawn outwards from the slot  131 , thereby adjusting a height of the second LED module  40 . In alternative embodiments, the two planar plates  41  and the main body  10  can cooperatively form an acute angle or a right angle, and only one of the two planar plates  41  can be rotated upwardly. In the third state when the LED lamp  100  functions as a second reading light, only the plurality of second LEDs  42  of the second LED module  40  provide light, and the first LED module  20  may be turned off. 
         [0022]    It is to be further understood that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only; and that changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.