Abstract:
A light device adapted to light and power cogeneration projects at least one illumination light beam and divergent light beam by a specified power supplied from an external power source. The light device comprises an optical-to-electrical energy transformation unit and a power storage unit. The optical-to-electrical energy transformation unit comprises a light-concentration assembly and an optical-to-electrical energy transformation interface for concentrating the divergent light beam to at least one concentrated light beam and sensing the concentrated light beam, so as to generate an inductive power transmitting to the power storage unit, where collects the inductive power to store an emergent power. When the external power source interrupts supplying the specified power, the power storage unit discharges the emergent power to drive the lighting assembly to go on projecting the illumination light beam and the divergent light beam.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a light device, and more particularly to a light device capable of performing light and power cogeneration. 
       BACKGROUND OF THE INVENTION 
       [0002]    In daily life, for exactly identifying environment and directions in the dark, illumination devices have already been sorts of indispensable tools. Due to that the cost of energy sources usually keeps in high, and the power used in illumination in a certain proportion of overall power in global for a long time, there are many engineers continuously doing their efforts to research and develop proper illumination devices to reduce the power consumption cost for illumination. 
         [0003]    Additionally, with respect to the function of the illumination device, the most illumination devices still needs to connect to an external power, such as public power supplying system, and then provides illumination to an external environment. However, once the external power source interrupts supplying a specified power to the illumination device, more particular when a large electric power cut occurs after a natural disaster, the most illumination device cannot go on providing emergent illumination to the external environment. 
         [0004]    For saving the cost of power used for illumination and providing the function of emergent illumination, there are many light devices being designed and widely used for most of people. Following up, two representative prior embodiments are cited to do more detail description. 
         [0005]    Please refer to  FIG. 1 , which is a functional block diagram illustrating a conventional light device being capable of being charged by a solar energy system. As shown in  FIG. 1 , a light device comprises a chargeable power source  11 , a circuit interface  12  and a lighting element  13 . The circuit interface  12  is respectively connected to the chargeable power source  11  and the lighting element  13 . The chargeable power source  11  is applied to discharge a specified power to the lighting element  13 , so as to make the lighting element  13  project an illumination light beam. 
         [0006]    When the power of the chargeable power source  11  is insufficient to drive the lighting element  13  to project an illumination light beam to the external environment, it is able to electrically connect the chargeable power source  11  to the solar energy system  2 , so as to charge the chargeable power source  11 . After completing the charging operation to the chargeable power source  11 , the chargeable power source  11  can discharge the specified power to the lighting element  13 , which can go on projecting the illumination light beam to the external environment. 
         [0007]    People skilled in related arts can easily realize that, comparing with the petrochemistry or nuclear energy power generation means, the solar energy can be gained everywhere to save the energy cost. However, the supplying of solar energy is not very stable, so that it is unable to ensure that the power stored in the solar energy system can stably supply to the chargeable power source  11 , and it is further unable to ensure that the lighting element  13  can provide stable illumination to the external environment. 
         [0008]    Please refer to  FIG. 2 , which is a functional block diagram illustrating that another light device can provide emergent illumination. As shown in  FIG. 2 , a light device  1   a  comprises a circuit interface  12   a , the chargeable power source  11  and the lighting element  13 . The circuit interface  12   a  comprises a power supplying circuit  121   a , a switch circuit  122   a , a power distribution circuit  123   a  and a detecting circuit  124   a . The power supplying circuit  121   a  is electrically connected with the power distribution circuit  123   a  and the lighting element  13 , and the switch circuit  122   a  is electrically connected to the chargeable power source  11  and the detecting circuit  124   a.    
         [0009]    When the light device  1   a  is connected to an external power source  3 , the power distribution circuit  124   a  can detect whether the external power source  3  sends a specified power to the power distribution circuit  123   a . If the detecting circuit detects that the external power source  3  sends the specified power to the power distribution circuit  123   a , the detecting circuit  124   a  can send a normal switch signal S 1  to the switch circuit  122   a , so that the chargeable power source  11  can electrically connect to the power distributed circuit  123   a  via the switch circuit  122   a.    
         [0010]    At this moment, the specified power supplied from the external power source  3  can be sent to the power distribution circuit  123   a , where can divide the specified power into a first distributed power and a second distributed power according to a preset distribution proportion. The first distributed power is sent to the lighting element  13  via the power supplying circuit  121   a , so as to drive the lighting element  13  to project the illumination light beam. The second distributed power is sent to the chargeable power source  11  to charge the chargeable power source  11 , where stored with an emergent power. 
         [0011]    On the contrary, if the detecting circuit  124   a  detects the external power source  3  interrupting sending the specified power to the power distribution circuit  123   a , the detecting circuit  124   a  can send an emergent switch signal S 2  to the switch circuit  122   a  to connect the chargeable power source  11  with the power supplying circuit  121   a  via the switch circuit  122   a . At this moment, the emergent power stored within the chargeable power source  11  can be sent to the lighting element  13  via the switch circuit  122   a  and the power supplying circuit  121   a , so as to drive the lighting element  13  to project the illumination light beam. 
         [0012]    Except for of the functional block diagram as shown in  FIG. 2 , in some circuit designs, the detecting circuit  124   a  is further electrically connected to the chargeable power source, so as to detect whether the emergent power stored within the chargeable power source reaches to a nominal power. When the emergent power reaches to the nominal power, the detecting circuit  124   a  can send a distribution signal to the switch circuit and the power distribution circuit  123   a , so as to interrupt the chargeable power source  11  being electrically connected to the power distribution circuit  123   a , and adjust the preset distribution proportion. 
         [0013]    People skilled in related arts can easily realize that, in the above technology, a circuit design for a light device is disclosed, wherein when the external power source  3  interrupts sending the specified power, it is able to drive the lighting element  13  to provide emergent illumination via the emergent power supplied from the chargeable power source  11 . 
         [0014]    However, in the above technology, for making the chargeable power source be stored with sufficient emergent power source, the power distribution circuit has to divide the specified power into the first distributed power and the second distributed power according to the preset distribution proportion, and then sends the second distributed power to the chargeable power source  11 . Thus, it must reduce the utilization ratio of the power used to light, wherein the utilization ratio of the power is related to the value that divides the first distributed power by the specified power. 
       SUMMARY OF THE INVENTION 
       [0015]    The problems intend being solved in the present invention and the objects of the present invention are described as follows: 
         [0016]    Although above two prior arts can solve some problems, there are still two existed problems difficult to be solved. The first problem is that it is unable to ensure that the lighting element can provide stable illumination, and the second problem is that the utilization ratio of the power used to light is reduced. 
         [0017]    Thus, the primary object of the present invention provides a light device capable of performing light and power cogeneration. The light device drive an optical-to-electrical energy transformation interface to generate an inductive power by taking advantage of the divergent light beams those cannot provide illumination to the external environment, and then collect the inductive power to store an emergent power. When the external power source interrupts supplying the specified power to the light device, it is able to drive the light device to go on providing illumination to the external environment by the emergent power. 
         [0018]    The second object of the present invention provides a light device capable of performing light and power cogeneration. The light device is arranged with a light-concentration assembly to concentrate the divergent light beams those cannot provide illumination to the external environment, so as to drive a optical-to-electrical energy transformation interface to generate an inductive power with higher intensity. 
         [0019]    The third object of the present invention provides a light device capable of performing light and power cogeneration, so as to store an emergent power. Therefore, a specified power supplied from an external power can be entirely used to light without being partially distributed to store the emergent power. 
         [0020]    Means of the present invention for solving problems: 
         [0021]    Means of the present invention for solving the problems as mentioned above provides a light device capable of performing light and power cogeneration, which can project at least one illumination light beam and at least one divergent beam by a specified power supplied from an external power source. The light device comprises an optical-to-electrical energy transformation unit and a power storage unit. The optical-to-electrical energy transformation unit comprises a light-concentration assembly and an optical-to-electrical energy transformation interface for concentrating the divergent light beam to at least one concentrated light beam and sensing the concentrated light beam, so as to generate an inductive power transmitting to the power storage unit, where collects the inductive power to store an emergent power. When the external power source interrupts supplying the specified power, the power storage unit discharges the emergent power to drive the lighting assembly to go on projecting the illumination light beam and the divergent light beam. 
         [0022]    Effects of the present invention with respect to prior arts: 
         [0023]    From above description, comparing with the conventional light device capable of being charged by the solar energy system in the prior art, the light device of the present invention can store the emergent power by using the divergent light beam that cannot provide illumination to the external environment. Thus, it can ensure that the light device still can provide stable illumination to the external environment, without charging any power supplied from the solar energy system, whenever the external power source cannot normally supplied the specified power. 
         [0024]    With comparison between the conventional light device capable of providing emergent illumination in the prior art and the light device of the present invention, the light device of the present invention stores the emergent power by using the divergent light beam that cannot provide illumination to the external environment, so that the specified power can be entirely supplied to the lighting assembly. Therefore, it is able to raise the utilization ratio of the power used to light. 
         [0025]    Additionally, in the conventional light device, the divergent light beam, which cannot provide illumination to the external environment, may be either lost by diverging to the external environment or transformed to heat energy absorbed by the light device to increase the surface temperature. However, in the present invention, it is able to use the divergent light beam to generate the inductive power, so as to raise the raise the utilization ratio of the light energy and reduce the surface temperature of the light device. 
         [0026]    The devices, characteristics, and the preferred embodiment of this invention are described with relative figures as follows. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]    The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein 
           [0028]      FIG. 1  is a functional block diagram illustrating a conventional light device being capable of being charged by a solar energy system; 
           [0029]      FIG. 2  is a functional block diagram illustrating that another light device can provide emergent illumination; 
           [0030]      FIG. 3  is a perspective view illustrating a preferred embodiment of the present invention; 
           [0031]      FIG. 4  is a functional block diagram illustrating the preferred embodiment of the present invention; 
           [0032]      FIG. 5  is a partial section view along the A-A direction of  FIG. 3 ; and 
           [0033]      FIG. 6  illustrates that the divergent light beams can be concentrated in the preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0034]    Due to that the light and power cogeneration means as provided in accordance with the present invention can be widely applied to many kinds of light devices, the combined applications are too numerous to be enumerated and described, so that only a preferred embodiment is disclosed as follows for representation. 
         [0035]    Please refer to  FIG. 3  to  FIG. 6 , wherein  FIG. 3  is a perspective view illustrating a preferred embodiment of the present invention,  FIG. 4  is a functional block diagram illustrating the preferred embodiment of the present invention,  FIG. 5  is a partial section view along the A-A direction of  FIG. 3 , and  FIG. 6  illustrates that the divergent light beams can be concentrated in the preferred embodiment of the present invention. As shown in the figures, a light device  4  comprises a light box  41 , a lighting assembly  42 , a circuit interface  43 , an optical-to-electrical energy transformation unit  44 , a power storage unit  45  and a conductive wire  46 . The lighting assembly  42  comprises a base plate  421  and a plurality of light emitting diodes (LEDs)  422 , wherein the base plate  421  is deposited on the circuit interface  43 , and the LEDs  422  are arranged on the base plate  421 . 
         [0036]    In this preferred embodiment, the circuit interface  43  is a circuit board deposited within the light box  41 , and comprises a power supplying circuit  431 , a detecting circuit  432  and a switch circuit  433 , wherein the power supplying circuit  431  is electrically connected to the lighting assembly  42 , the detecting circuit  432  is electrically connected to the switch circuit  433  and the switch circuit  433  is electrically connected to the power storage unit  4 . 
         [0037]    The optical-to-electrical energy transformation unit  44  is deposited within the light box  41 , and comprises a light-concentration assembly  441  and a optical-to-electrical energy transformation interface  442 , wherein the light-concentration assembly comprises a plurality of light-concentration elements arranged in a predetermined array. In this preferred embodiment, the light-concentration elements are five light-concentration lenses  441   a ,  441   b ,  441   c ,  441   d  and  441   e  arranged in a linear array. The power storage unit  45  is electrically connected to the optical-to-electrical energy transformation interface  442  of the optical-to-electrical energy transformation interface  44  via the conductive wire  46 . In the practice application, the conductive wire  46  can be a flexible printed circuit (FPC), the base plate  421  usually formed with heat-dissipating structures, and the base plate  421 , the circuit interface  43  and the optical-to-electrical energy transformation interface  442  usually can be integrated to an one-part module. 
         [0038]    When the light device  4  is electrically connected to the external power source  3 , the power supplying circuit  431  and the detecting circuit also can be electrically connected to the external power source  3 . Thus, the detecting circuit  432  can detect whether the external power source  3  supplies the specified power to the lighting assembly  42  via the power supplying circuit  431 . At this moment, the external power source  3  can send the specified power to the lighting assembly  42 , so that one of the LEDs  422  can projects an illumination light beam IL and two divergent light beam DL and DL′, as shown in  FIG. 5 . The illumination light beam IL can be directly used to provide illumination to the external environment, while the divergent light beam DL cannot directly provide illumination to the external environment. The light concentration lenses  441   a ,  441   b ,  441   c ,  441   d  and  441   e  of the optical-to-electrical energy transformation interface  44  are located on a first projecting path of the divergent light beam DL, so as to respectively concentrate the divergent light beam to five concentrated light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5 . 
         [0039]    The optical-to-electrical energy interface  442  is located on a second projecting path, which concentrates five projecting paths of the five concentrated light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5 , so as to senses the concentrated light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5  to generate an inductive power. The inductive power can be sent to the power storage unit  45  via the conductive wire  46 , and the power storage unit  45  can collect the inductive power to store an emergent power. 
         [0040]    When the detecting circuit detects that the external power source  3  interrupting supplying the specified power to the lighting assembly  42 , the detecting circuit  432  can send a connecting signal S 3  to the switch circuit  433  to make the switch circuit  433  electrically connect to the power supplying circuit  431 . Hence, the power storage unit  45  can discharge the emergent power sending to the lighting assembly via the power supplying circuit  431 , so as to drive the LEDs  422  of the lighting assembly  42  to go on projecting the illumination light beam, the divergent light beams DL and DL′, wherein the divergent light beam DL can be re-used to make the optical-to-electrical energy interface  442  generate the inductive power, and the power storage unit  45  can collect the inductive power to charge the emergent power stored therein. 
         [0041]    When the detecting circuit  432  detects that the external power source  3  returning supplying the specified power to the lighting assembly  42 , the detecting circuit  432  can send an interruption signal S 4  to the switch circuit  433  to make the switch circuit  433  interrupt electrically connecting to the power supplying circuit  431 . Thus, it is able to drive the LEDs  422  of the lighting assembly  42  to go on projecting the illumination light beam, the divergent light beams DL and DL′, wherein the divergent light beam DL can be re-used to make the optical-to-electrical energy interface  442  generate the inductive power, and the power storage unit  45  can collect the inductive power to charge the emergent power stored therein. 
         [0042]    After reading above description, people skilled in related arts can easily realize that in the present invention, the light device  4  is applied to store the emergent power by using the divergent light beam DL, which is unable to directly provide illumination to the external environment. Therefore, it is unnecessary to use the solar energy system to charge the light device  4 , and it can further ensure that the lighting assembly  42  still can provide stable illumination to the external environment whenever the external power source  3  cannot normally supply the specified power the light device. 
         [0043]    Meanwhile, the light device  4  is applied to store the emergent power by using the divergent light beam DL, which is unable to directly provide illumination to the external environment. Therefore, the specified power supplied from the external power source  3  almost can be entirely supplied to the lighting assembly  42  to raise the utilization ratio of the power used to light. 
         [0044]    Nevertheless, in the conventional light device, the divergent light beam, which cannot provide illumination to the external environment, may be either lost by diverging to the external environment or transformed to heat energy absorbed by the light device to increase the surface temperature. However, in the present invention, it is able to use the divergent light beam DL to generate the inductive power, so as to raise the utilization ratio of the light energy and reduce the surface temperature of the light device. 
         [0045]    After reading above description, people skilled in the related arts can further realize that the concentration degree of the concentration light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5  projecting to the optical-to-electrical energy transformation interface  442  can directly influence the intensity of the inductive power, and the concentration degree of the concentration light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5  projecting to the optical-to-electrical energy transformation interface  442  is depended on the intensity of the divergent light DL, and the optical property, the arrangement direction and the arrangement angle of the light-concentration lenses  441   a ,  441   b ,  441   c ,  441   d  and  441   e.    
         [0046]    In  FIG. 6 , for improving the concentration degree of the concentration light beams CL 1 , CL 2 , CL 3 , CL 4  and CL 5  projecting to the optical-to-electrical energy transformation interface  442 , any one of the light-concentration lenses  441   a ,  441   b ,  441   c ,  441   d  and  441   e  is arranged in the arrangement angle different from each other. In the practice application, the amount and the arrangement method of the light-concentration lenses can be adjusted to increase the concentration degree of the concentration light beams projecting to the optical-to-electrical energy transformation interface  442 , so as to generate the inductive power with higher intensity. 
         [0047]    Although the present invention has been described with reference to the preferred embodiments thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.