Abstract:
A reflecting cover includes a substrate and a reflecting ring. The substrate is configured for receiving an LED. The reflecting ring is mounted on the substrate. The reflecting ring includes a plurality of reflecting units. The reflecting units are configured for reflecting light of the LED. The angles of the reflecting units relative to the substrate increase in turn along a direction away from the substrate.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The disclosure relates generally to illumination, and more particularly to an illumination device utilizing a reflecting system. 
         [0003]    2. Description of the Related Art 
         [0004]    With the development of LED-based illumination, effective distribution of generated light is a priority. One method to obtain specific illumination distribution utilizes a plurality of light sources with determined light emitting angles. The requisite device is, however, bulky and expensive. In a second method, a specific lens array is utilized adjusting the light emission angle. However, such a lens array is very expensive. Further, when the light is transmitted through the lens array, much light energy is lost. Thus, what is called for is an illumination device utilizing a reflecting system that can alleviate the limitations described. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]      FIG. 1  is a perspective view of a reflecting cover in accordance with a first embodiment of the disclosure. 
           [0006]      FIG. 2  is a cross-section along line II-II of the reflecting cover in  FIG. 1 . 
           [0007]      FIG. 3  is a cross-section of a reflecting cover in accordance with a second embodiment of the disclosure. 
           [0008]      FIG. 4  is an exploded view of an illumination device in accordance with a third embodiment of the disclosure. 
           [0009]      FIG. 5  is an exploded view of an illumination device in accordance with a fourth embodiment of the disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0010]    Referring to  FIG. 1  and  FIG. 2 , a reflecting cover  10  in accordance with a first embodiment of the disclosure includes a substrate  11  and a reflecting ring  12 . The reflecting cover  10  is configured for adjusting the illumination distribution of a light emitting diode (LED)  101 . 
         [0011]    A receiving portion  112  is defined in the middle of the substrate  11 . The receiving portion  112  is configured for receiving the LED  101 . The substrate  11  is a transparent plate of glass or resin. The receiving portion  112  is a through-hole in the first embodiment. Optimally, the light emitting surface  1012  of the LED  101  is parallel to and coplanar with the upper surface  114  of the substrate  11 . 
         [0012]    The reflecting ring  12  is mounted on the substrate  11 . A chamber  13  is formed by the substrate  11  and the reflecting ring  12  cooperatively. The reflecting ring  12  includes a first reflecting unit  121 , a second reflecting unit  122  and a third reflecting unit  123 . Here, the first reflecting unit  121 , the second reflecting unit  122  and the third reflecting unit  123  are annular, but can, alternatively, have other shapes, such as rectangle or other. The angle of the third reflecting unit  123  relative to the substrate  11  exceeds that of the second reflecting unit  122  relative to the substrate  11 . The angle of the second reflecting unit  122  relative to the substrate  11  exceeds that of the first reflecting unit  121  relative to the substrate  11 . In other words, the third reflecting unit  123  is steeper than the second reflecting unit  122  which in turn is steeper than the first reflecting unit  121 . 
         [0013]    Referring to  FIG. 3 , a reflecting cover  20  in accordance with a second embodiment of the disclosure differs from the first embodiment in that an LED  201  is mounted on the middle of the mounting surface  212 , whereby a top light emitting surface (not labeled) of the LED  201  is parallel to and above the mounting surface  212  of the substrate  21 , in which the mounting surface  212  is an upper surface of the substrate  21 . 
         [0014]    The reflecting ring  22  includes a first reflecting unit  221  and a second reflecting unit  222  mounted on the substrate  21 . The first reflecting unit  221  is adjacent to the substrate  21 , configured for reflecting light from the LED  201 . The first reflecting unit  221  has a predetermined angle relative to the substrate  21 . The second reflecting unit  222  extends upwardly from a top edge of the first reflecting unit  221  and is perpendicular to the substrate  21 . 
         [0015]    The light from the LED  201  is reflected by the first reflecting unit  221  and the second reflecting unit  222 . Thus specific illumination distribution of the light of the LED  201  is obtained. 
         [0016]    Referring to  FIG. 4 , an illumination device  30  in accordance with a third embodiment of the disclosure includes a substrate  31 , a plurality of LEDs  32 , a reflecting module  33  and a transparent plate  34 . 
         [0017]    The LEDs  32  are mounted on a surface  311  of the substrate  31 . The LEDs  32  are electrically connected to the substrate  31 . The substrate  31  is electrically connected to a peripheral power supply (not shown). 
         [0018]    The reflecting module  33  includes a plurality of reflecting covers  10  each being as that shown in the first embodiment. The reflecting covers  10  are mounted on the surface  311  of the substrate  31 . Each LED  32  is received in one of the reflecting covers  10 . 
         [0019]    The transparent plate  34  is mounted on the reflecting module  33 . The transparent plate  34  is opposite to the surface  311  of the substrate  31 , configured for enveloping the reflecting module  33  and uniformly transmitting the light from the reflecting module  33 . 
         [0020]    Referring to  FIG. 5 , an illumination device  40  in accordance with a fourth embodiment of the disclosure includes a substrate  41 , a plurality of LEDs  42 , a reflecting module  43  and a transparent plate  44 . 
         [0021]    The LEDs  42  are mounted on the substrate  41 . The reflecting module  43  includes a substrate  431  and a plurality of reflecting covers  10  each being as that shown in the first embodiment. The reflecting covers  10  are mounted on the substrate  431  in matrix array. Compared with the third embodiment, the illumination device  40  can be more easily assembled since the reflecting covers  10  are assembled to the substrate  431  as a unit in advance whereby the reflecting covers  10  can be moved to cover all of the LEDs  42  by a single step of operation. 
         [0022]    The structure of the reflecting cover  10 , while simple and easily manufactured, provides specific illumination distribution. Production costs of an illumination device utilizing the reflecting cover  10  decreases accordingly. 
         [0023]    While the disclosure has been described by way of example and in terms of exemplary embodiment, it is to be understood that the disclosure is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.