Abstract:
A light-emitting diode (LED) module lamp with adjustable chromaticity is provided. The LED module lamp is formed by at least one set of second module including a plurality of LED modules, namely a first LED module to an n th  LED module. Each of the LED modules includes a plurality of LEDs having visible spectrum chromaticities. That is, a first chromaticity LED C 1  to an n th  chromaticity LED C n  form a structure in a cyclic arrangement. The second module array is: 
     
       
         
           
               
             
               
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     where the first to n th  columns are independently connected in series.

Description:
[0001]    This application claims the benefit of Taiwan application Serial No. 102204502, filed Mar. 12, 2013, the disclosure of which is incorporated by reference herein in its entirety. 
       TECHNICAL FIELD 
       [0002]    The present invention relates to a light-emitting diode (LED), and more particularly to an LED module lamp with adjustable chromaticity. 
       BACKGROUND 
       [0003]    In the prior art, an LED lamp is formed by combining red, blue and green LEDs in a single module lamp. The single module lamp forms into a single chroma LED module lamp through a pulse current provided by a pulse modulator. Alternatively, several of the single module lamp may be connected in parallel to generate a plurality of LED lamps with monochromaticity or a constant chromaticity. To control the LEDs for diversified chromaticities, a sophisticated pulse modulator is usually required. 
       SUMMARY 
       [0004]    A light-emitting diode (LED) module lamp with adjustable chromaticity is provided. The LED module lamp is formed by at least one set of second module repeatedly connected in series. The second module comprises a plurality of LED modules, namely a first LED module to an n th  LED module. Each of the LED modules comprises a plurality of LEDs having visible spectrum chromaticities, and is formed by a structure in a cyclic arrangement from a first chromaticity LED C 1  to an nth chromaticity LED C n . A chromaticity sequence of the LEDs of the first LED module is the first chromaticity LED C 1 , the second LED chromaticity LED C 2 , . . . , the (n−1) th  chromaticity LED C n-1 , and the nth chromaticity LED C n ; the chromaticity sequence of the first LED module is a first column: └C 1 , C 2 , C 3 , C 4 , . . . , C n-1 , C n  ┘. A chromaticity sequence of the LEDs of the second LED module is the second chromaticity LED C 2 , the third LED chromaticity LED C 3 , . . . , the (n−1) th  chromaticity LED C n-1 , the nth chromaticity LED C n , and the first chromaticity LED C 1 ; the chromaticity sequence of the second LED module is a second column: └C 2 , C 3 , C 4 , . . . , C n-1 , C n , C 1 ┘. A chromaticity sequence of the LEDs of the n th  LED module is the n th  chromaticity LED C n , the first chromaticity LED C 1 , the second LED chromaticity LED C 2 , the third LED chromaticity LED C 3 , . . . , and the (n−1) th  chromaticity LED C n-1 ; the chromaticity sequence of the n th  LED module is an n th  column: └C n , C 1 , C 2 , C 3 , C 4 , . . . C n-2 , C n-1 ┘. A combination array (n×n) of the first LED module, the second LED module, the third LED module, to the n th  LED module of the second module is: 
         [0000]    
       
         
           
               
             
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         [0005]    The first to the n th  columns are respectively connected in series, and have equal total rated operating voltages, respectively. That is, the total rated operating voltages are equal to the operating voltages of the C 1  to C n  chromaticity LEDs added together, respectively. The chromaticity LEDs C 1  to C n  at the first column are sequentially connected in series as one group, the chromaticity LEDs C 2  to C n-1 , C n  and C 1  at the second column are sequentially connected in series as one group, the chromaticity LEDs C 3  to C n  and C n-1  at the third column are sequentially connected in series as one group, and the chromaticity LEDs C n , C 1 , C 2  to C n-2  and C n-1  in the n th  column are sequentially connected in series as one group. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]      FIG. 1  is a schematic diagram of an LED module lamp with adjustable chromaticity according to a first embodiment. 
           [0007]      FIG. 2  is a schematic diagram of PMWs combined with the first embodiment. 
           [0008]      FIG. 3  is a schematic diagram of a first luminance chromaticity of a work period of a first LED according to the first embodiment. 
           [0009]      FIG. 4  is a schematic diagram of a second luminance chromaticity of a work period of a second LED according to the first embodiment. 
           [0010]      FIG. 5  is a schematic diagram of a third luminance chromaticity of a work period of a third LED according to the first embodiment. 
           [0011]      FIG. 6  is a schematic diagram of controllers and PWMs combined with the first embodiment. 
           [0012]      FIG. 7  is a schematic diagram of a first intensity of a work period of a first LED module and current combinations according to the first embodiment. 
           [0013]      FIG. 8  is a schematic diagram of a second intensity of a work period of a second LED module and current combinations according to the first embodiment. 
           [0014]      FIG. 9  is a schematic diagram of a third intensity of a work period of a third LED module and current combinations according to the first embodiment. 
           [0015]      FIG. 10  is a schematic diagram of an LED module lamp with adjustable chromaticity according to a second embodiment. 
           [0016]      FIG. 11  is a schematic diagram of PMWs combined with the first embodiment. 
           [0017]      FIG. 12  is a schematic diagram of a first luminance chromaticity of a work period of a first LED according to the second embodiment. 
           [0018]      FIG. 13  is a schematic diagram of a second luminance chromaticity of a work period of a second LED according to the second embodiment. 
           [0019]      FIG. 14  is a schematic diagram of a third luminance chromaticity of a work period of an n th  LED according to the second embodiment. 
           [0020]      FIG. 15  is a schematic diagram of controllers and PWMs combined with the second embodiment. 
           [0021]      FIG. 16  is a schematic diagram of a first intensity of a work period of a first LED module and current combinations according to the second embodiment. 
           [0022]      FIG. 17  is a schematic diagram of a second intensity of a work period of a second LED module and current combinations according to the second embodiment. 
           [0023]      FIG. 18  is a schematic diagram of a third intensity of a work period of an n th  LED module and current combinations according to the second embodiment. 
       
    
    
       [0024]    In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing. 
       DETAILED DESCRIPTION 
       [0025]      FIG. 1  shows an LED module lamp  9  with adjustable chromaticity according to a first embodiment of the present invention. The LED module lamp  9  is formed by repeatedly connecting at least one set of first module  21  in series. The first module  21  comprises a first LED module  11 , a second LED module  12  and a third LED module  13 . The first LED module  11  sequentially comprises a red LED  41 , a green LED  42  and a blue LED  43 . The second LED module  12  sequentially comprises the green LED  42 , the blue LED  43  and the red LED  41 . The third LED module  13  sequentially comprises the blue LED  43 , the red LED  41  and the green LED  42 . Further, an LED output of the first LED module  11  is connected to an LED input end of the second LED module  12 , and an LED output end of the second LED module  12  is connected to an input end of the third LED module  13  to form a serial connection structure. An output end of the red LED  41  of the first LED module  11  is connected to an input end of the green LED  42  of the second LED module  12 , and an output end of the green LED  42  of the second LED module  12  is connected to an input end of the blue LED  43  of the third LED module  13  to form a serial connection. An output end of the green LED  42  of the first LED module  11  is connected to an input end of the blue LED  43  of the second LED module  12 , and an output end of the blue LED  43  of the second LED module  12  is connected to an input end of the red LED  41  of the third LED module  13  to form a serial connection. An output end of the blue LED  43  of the first LED module  11  is connected to an input end of the red LED  41  of the second LED module  12 , and an output end of the red LED  41  of the second LED module  12  of the second LED module  12  is connected to an input end of the green LED  42  of the third LED module  13  to form a serial connection. 
         [0026]    Referring to the first embodiment shown in  FIG. 1 , the at least one first module  21  comprises: a starting terminal, which is the input end of the first module  21  and is connected to a first voltage  31 ; and an ending terminal, which is the output end of the first module  21  and is connected to a ground potential  32 . When the first LED module  11  is connected in series to the first LED module  11  and sequentially connected in series to the third LED module  13 , a total potential of a power supply is the same. The total potential is the potentials of the green LED  42 , the red LED  41  and the blue LED  43  of the first LED module  11 , the first LED module  11 , and the third LED module  13  added together, respectively. 
         [0027]    As shown in  FIG. 2 , the first embodiment comprises three pulse width modulators (PWMs)  51 . Each of the PWMs  51  has a second end connected to the ground potential  32 , and a first end connected to the output end of the first module  21  as the ending terminal. The output end of the first module  21  serving as the ending terminal is an independent output terminal of the three modules connected in series, respectively. Work periods of the three PWMs  51  are also independent, and are an adjustable range of 0% to 100%. 
         [0028]    As shown in  FIG. 6 , the first embodiment of the present invention comprises three controllers  52 . Each of the controllers  52  has one end connected to the ground potential  32 , and the other end connected to the second end of the corresponding PWM  52 . The controllers are constant voltage controllers, constant current controllers, or constant voltage and constant current controllers. A control current of the three controllers can be independently adjusted. 
         [0029]    In the first embodiment of the present invention, the red LED  41 , the green LED  42  and the blue LED  43  of the first LED module  11 , through different work period combinations of the three PWMs  51 , generate a first luminance chromaticity in a first period T 1 , as shown in  FIG. 3 . The red LED  41 , the green LED  42  and the blue LED  43  of the second LED module  12 , through different work period combinations of the PWMs  52 , generate a second luminance chromaticity in the first period T 1 , as shown in  FIG. 4 . The red LED  41 , the green LED  42  and the blue LED  43  of the third LED module  13 , through different work period combinations of the PWMs  52 , generate a third luminance chromaticity in the first period T 1 , as shown in  FIG. 5 . 
         [0030]    In the first embodiment of the present invention, the red LED  41 , the green LED  42  and the blue LED  43  of the first LED module  11 , through different operating current combinations of the three PWMs  51 , generate a first luminance intensity in the first period T 1 , as shown in  FIG. 7 . The red LED  41 , the green LED  42  and the blue LED  43  of the second LED module  12 , through different operating current combinations of the PWMs  52 , generate a second luminance intensity in the first period T 1 , as shown in  FIG. 8 . The red LED  41 , the green LED  42  and the blue LED  43  of the third LED module  13 , through different operating current combinations of the PWMs  52 , generate a third luminance intensity in the first period T 1 , as shown in  FIG. 9 . A second period T 2  is a repetition of the first period T 1 . In the present invention, period changes of chromaticities are controlled through different combinations of a plurality of periods. More specifically, the three PWMs control the work periods of a plurality of periods are controlled to generate an LED module lamp  9  with adjustable chromaticity capable of automatically changing between various chromaticities. 
         [0031]    As shown in  FIG. 10 , in a second embodiment of the present invention, the LED module lamp  9  with adjustable chromaticity is formed by a plurality of LEDs having visible spectrum chromaticities disposed in a cyclic arrangement. The LED module lamp  9  with adjustable chromaticity comprises at least one second module  22  repeatedly connected in series. The second module  22  comprises a plurality of LED modules, which are the first LED module  11  to an n th  LED module  19 . Each of the LED modules comprises a plurality of LEDs having visible spectrum chromaticities sequentially disposed in a cyclic arrangement. The LEDs having visible spectrum chromaticities comprise a first chromaticity LED C 1 , a second chromaticity LED C 2 , . . . , to an (n−1) th  chromaticity LED C n-1 , and an nth chromaticity LED C n . Based on a corresponding application of substantial characteristics of the first embodiment, the second embodiment of the present invention further comprises a plurality of LEDs having visible spectrum chromaticities sequentially disposed in a cyclic arrangement. Further, the first LED module  11 , the second LED module  12  and the third LED module  13  are not limited to the three primary colors of the red LED  41 , the green LED  42  and the blue LED  43 . 
         [0032]    A chromaticity sequence of the LEDs of the first LED module  11  is sequentially the first chromaticity LED C 1 , the second chromaticity LED C 2 , . . . , to the (n−1) th  chromaticity LED C n-1  and the nth chromaticity LED C n . Thus, the chromaticity sequence of the first LED module  11  is simplified to the first column as: 
         [0000]      └C 1 ,C 2 ,C 3 ,C 4 , . . . ,C n-1 ,C n ┘  (1)
 
         [0033]    In the above, C 1  represents the first chromaticity LED, C 2  represents the second chromaticity LED, . . . , C n-1  represents the (n−1) th  chromaticity LED, and C n  represents the n th  chromaticity LED. 
         [0034]    A chromaticity sequence of the LEDs of the second LED module  11  is sequentially the second chromaticity LED C 2 , the third chromaticity LED C 3 , . . . , the (n−1) th  chromaticity LED C n-1 , the nth chromaticity LED C n , and the first chromaticity LED C 1 . Thus, the chromaticity sequence of the second LED module  12  is simplified to a second column as: 
         [0000]      └C 2 ,C 3 ,C 4 , . . . ,C n-1 ,C n ,C 1 ┘  (2)
 
         [0035]    In the above, C 2  represents the second chromaticity LED, C 3  represents the third chromaticity LED, . . . , C n-1  represents the (n−1) th  chromaticity LED, C n  represents the nth chromaticity LED, and C 1  represents the first chromaticity LED. 
         [0036]    In summary, in the present invention, a chromaticity sequence of a plurality of LEDs of an n th  LED module  19  is the n th  chromaticity LED C n , the first chromaticity LED C 1 , the second chromaticity LED C 2 , the third chromaticity LED C 3 , . . . , and the (n−1) th  chromaticity LED C n-1 . Thus, the chromaticity sequence of the n th  LED module  19  is simplified to an n th  column as: 
         [0000]      └C n ,C 1 ,C 2 ,C 3 ,C 4 , . . . C n-2 ,C n-1 ┘  (n)
 
         [0037]    In the above, C n  represents the n th  chromaticity LED, C 1  represents the first chromaticity LED, C 2  represents the second chromaticity LED, C 3  represents the third chromaticity LED, . . . , and C n-1  represents the (n−1) th  chromaticity LED. 
         [0038]    According to the chromaticity LED sequence structure of the LED module lamp  9  with adjustable chromaticity, a combination matrix (n×n) of the first LED module  11 , the second LED module  12 , the third LED module  13 , the fourth LED module  14 , . . . , the (n−1) th  LED module  18 , and the n th  LED module  19  is described as below: 
         [0000]    
       
         
           
             
               
                 
                   
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         [0039]    The above combination array expresses the second module  22  of the LED module lamp  9  with adjustable chromaticity. The combination array is sequentially a first list/the first LED module  11 , a second list/the second LED module  12 , a third list/the third LED module  13 , . . . , an (n−1) th  list/the (n−1) th  LED module  18 , and an (n) th  list/the (n) th  LED  19 . In the serial mode of the voltage supplies, the power supplies are connected in series according to respectively columns, with the first chromaticity LED in the column providing the voltage supply, and the last chromaticity LED in the column being connected to the ground. The chromaticity LEDs C 1  to C n  at the first column are sequentially connected in series as one group, the chromaticity LEDs C 2  to C n-1 , C n  and C 1  at the second column are sequentially connected in series as one group, the chromaticity LEDs C 3  to C n  and C n-1  at the third column are sequentially connected in series as one group, and the chromaticity LEDs C n , C 1 , C 2  to C n-2  and C n-1  in the n th  column are sequentially connected in series as one group. The at least one set of second module  22  comprises an input end serving as the starting terminal connected to the first voltage  31 , and an output end serving as an ending terminal connected to the ground potential  32 . 
         [0040]    In the second embodiment of the present invention, the first chromaticity LED C 1  to the n th  chromaticity LED C n  have a rated operating voltage, respectively. Through the structure in a cyclic arrangement of the present invention, the first to n th  columns are individually connected in series and have an equal total rated operating voltage, respectively. That is, the total rated operating voltages are equal to the operating voltages of the C 1  to C n  chromaticity LEDs added together, respectively. As such, when the LED module lamp is implemented to applications from architectural landscapes to commercial models, no additional circuits are required. More specifically, as the plurality of second modules  22  can be readily connected in series while providing equal total operating voltages of the independent serial connections, an issue of requiring an additional circuit due to different operating voltages may be eliminated. 
         [0041]    As shown in  FIG. 11 , the second embodiment of the present invention comprises an n number of PWMs  51 . Each of the PWMs  51  has a second end connected to a ground potential, and a first end connected to the output end of the second module  22  serving as the ending terminal. The output end of the second module  22  serving as the ending terminal is the output end of the n sets of independent serial connections. Word periods of the three PWMs  51  are also independent, and are an adjustable range of 0% to 100%. 
         [0042]    As shown in  FIG. 15 , the second embodiment of the present invention comprises an n number of controllers  52 . Each of the controllers  52  has one end connected to a ground potential, and the other end connected to the second end of the corresponding PWM  52 . The controllers are constant voltage controllers, constant current controllers, or constant voltage and constant current controllers. A control current of the three controllers can be independently adjusted. 
         [0043]    As shown in  FIG. 12 , the first LED C 1  to the nth LED C n , └C 1 , C 2 , C 3 , C 4 , . . . , C n-1 , C n ┘, through different work period combinations of the n number of PWMs  51 , generate a first luminance chromaticity in a first period T 1 . As shown in  FIG. 13 , the second LED C 2  to the first LED C 1 , └C 2 , C 3 , C 4 , . . . , C n-1 , C n , C 1 ┘, through different work period combinations of the n number of PWMs  51 , generate a second luminance chromaticity in the first period T 1 , and so forth. As shown in  FIG. 14 , the n th  LED C n  to the first LED C n-1 , └C n , C 1 , C 2 , C 3 , C 4 , . . . C n-2 , C n-1 ┘, through different work period combinations of the n number of PWMs  51 , generate an nth luminance chromaticity in the first period T 1 . 
         [0044]    Therefore, in the second embodiment of the present invention, through different combinations of different work period combinations of the n number of PWMs  51 , the LEDs in each of the LED modules generate a plurality of luminance chromaticities in the first period T 1 . 
         [0045]    As shown in  FIG. 16 , the first LED C 1  to the n th  LED C n  of the first LED module  11 , ℑC 1 , C 2 , C 3 , C 4 , . . . , C n-1 , C n ┘, through different operating current combinations of the n number of controllers  52 , generate a first luminance intensity in the first period T 1 . As shown in  FIG. 17 , the second LED C 2  to the first LED C 1  of the second LED module  12 , └C 2 , C 3 , C 4 , . . . , C n-1 , C n , C 1 ┘, through different operating current combinations of the n number of controllers  52 , generate a second luminance intensity in the first period T 1 , and so forth. As shown in  FIG. 18 , the n th  LED C n  to the (n−1) th  LED C n-1  of the n th  LED module  19 , └C n , C 1 , C 2 , C 3 , C 4 , . . . C n-2 , C n-1 ┘, through different operating current combinations of the n number of controllers  52 , generate an n th  luminance intensity in the first period T 1 . 
         [0046]    Therefore, in the second embodiment of the present invention, through the different operating current combinations of the n number of controllers  52 , the LEDs in the LED modules generate a plurality of luminance intensities in the first period T 1 , respectively. 
         [0047]    The first period T 1  and a subsequent second period T 2  are consecutive operation periods. 
         [0048]    It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.