Abstract:
A solar spectrum-like LED structure, comprising a negative electrode for a three-dimensional integrated package, and a plurality of LED chips and resistors. The negative electrode for a three-dimensional integrated package is a three-dimensional structure comprising a plurality of planes. The plurality of LED chips is installed on the plurality of planes of the negative electrode for the three-dimensional integrated package. Light of different colors emitted by the plurality of LED chips forms a plane light source or a cone light source after being well mixed at an intersection point, thus simulating a solar spectrum. The invention enables manufacturing of a solar spectrum-like LED fluorescent lamp suitable for generating different bands of spectrums for the survival and metabolism of various organisms. In addition, the solar spectrum-like LED fluorescent lamp has a good color-rendering property and visual effect, and can be widely applied in the fields of general lighting, agriculture, animal husbandry and new biological energy sources.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a national phase entry under 35 U.S.C. §371 of International Patent Application PCT/CN2014/086090, filed Sep. 9, 2014, designating the United States of America and published as International Patent Publication WO 2016/037306 A1 on Mar. 17, 2016. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to the field of LED lighting and, more particularly, to a solar spectrum-like LED structure. 
       BACKGROUND 
       [0003]    White LED, as the fourth generation of lighting source, has the advantages of solidified, small size, low heat, low power consumption, long life, fast responding speed and environmental, and is expected to be widely applied in the fields of general lighting and backlight source in the future. In particular, white LED lighting, since it satisfies the requirements of energy saving and environmental protection of the green lighting projects, it is expected to be widely used in the future. However, the light principle of semiconductor LED determines that the emitted light can only be monochromatic light, while the visible sunlight is a colorful spectrum composed of the colors of red, orange, yellow, green, cyan, blue and purple. It is obvious that a semiconductor LED light source only having a monochromatic light is not suitable for the field of general lighting. If the semiconductor LED light source is required to use for the field of general lighting, the defect of monochrome light emitting must be overcome through the application of other technologies. White LED technology is a typical representative of the transformation of LED monochrome light; the purpose thereof is to make the LED light source close to the natural sunlight color, thereby making it useful in the field of general lighting. 
         [0004]    At present, in the manufacture of white LED at home and abroad, fluorescent material is a very important technology. White light is generated almost completely by using the mode of yellow phosphor plus blue light. The property and preparation process of the fluorescent material directly affect the luminous efficiency, conversion efficiency, color coordination, color temperature and color-rendering property of the white LED. In actual application, the fluorescent material of the current white LED uses the amorphous phosphor as the main body. Generating a white light by the combination of single chip and phosphor is still the mainstream of the development of the general white light LED product. However, there are still several technical problems to be solved in the process of producing LED by using phosphor technology at the present stage of white LED: 1) the excitation efficiency and light conversion efficiency of phosphor are low; 2) the phosphor particles and dispersal uniformity issues are difficult to be effectively and completely solved; 3) phosphor lacks the red light-emitting component, it is difficult to produce a white LED with low color temperature and high color-rendering index; 4) the high light attenuation of phosphor leads to a shortened white LED life; and 5) phosphor has a poor physicochemical property that is unsuitable for the development requirement of the high-power LED. Under the influence of these problems of the properties of phosphor, the solving of the problems of white LED such as luminous efficiency, color-rendering property, life, high-power application and the like have encountered technical bottlenecks. This situation shows that the bottleneck of LED development increasingly highlighted that phosphor cannot meet the requirements of existing white LED and adapt to the future development trend of LED fluorescent lamp. 
         [0005]    In the existing mixed LED white light technology, the white light is generated by a mixed light made by two or three complementary two-color LED light-emitting diodes or three primary color LED light-emitting diodes. This technology generally uses only a simple structure for mixing to obtain the mixed light, its color-rendering property is poor, and it is difficult to meet the practical requirements. 
         [0006]    Meanwhile, with the acceleration of the speed of white LED lights coming to the market and the expansion of the application field, it exposed the major application problem of “visual defect” that still existed in the current white LED lights. This defect bears the brunt of the harm and influence to the human eye, more and more attracting the attention and research of the customer and all sectors of the society. 
         [0007]    In view of the above problems, the present invention is aimed to design a solar spectrum-like LED structure. A solar spectrum can be simulated by gathering and well mixing LED light of different colors. The solar spectrum-like LED structure of the present invention overcomes the technical defect that the traditional white LED technology needs to use phosphor and can simulate a solar spectrum, while, at the same time, has good color-rendering property and visual effect, and can be widely applied in the fields of general lighting, agriculture, animal husbandry and new biological energy sources. 
       BRIEF SUMMARY 
       [0008]    The invention proposes a solar spectrum-like LED structure that overcomes the technical defect that the traditional white LED technology needs to use phosphor and can simulate a solar spectrum, while, at the same time, has good color-rendering property and visual effect, and can be widely applied in the fields of general lighting, agriculture, animal husbandry and new biological energy sources. 
         [0009]    The present invention provides a solar spectrum-like LED structure comprising:
       a negative electrode for a three-dimensional integrated package, the negative electrode for a three-dimensional integrated package being a three-dimensional structure comprising a plurality of planes;   a plurality of LED chips, the plurality of LED chips being installed on a plurality of planes of the negative electrode for the three-dimensional integrated package, each plane being correspondingly installed with one LED chip; and   a plurality of resistors, one end of each of the plurality of resistors being separately connected to the light-emitting surface of the LED chips, and the other end of each of the plurality of resistors being connected to the positive electrode.       
 
         [0013]    Furthermore, the negative electrode for a three-dimensional integrated package of the present invention is a structure designed based on a semi-cylindrical surface having a plurality of planes thereon, the lines from the center point of each plane to the center of the designed semi-cylindrical surface being separately perpendicular to each of the corresponding planes. The plurality of LED chips are separately installed on each plane, and each plane is correspondingly installed with one LED chip. 
         [0014]    Furthermore, the computational formula of the design radius of the structure designed based on a semi-cylindrical surface of the present invention is as follows: 
         [0000]    
       
         
           
             Ra 
             = 
             
               
                 1 
                 2 
               
                
               
                 
                   ( 
                   
                     L 
                     + 
                     M 
                   
                   ) 
                 
                 / 
                 sin 
               
                
               
                 
                   90 
                    
                   ° 
                 
                 n 
               
             
           
         
       
     
         [0000]    wherein, L is the size of the edge of the LED chip, M is the spacing between the LED chips, n is the number of the LED chips, and Ra is the design radius of the electrode designed based on semi-cylindrical surface. 
         [0015]    Furthermore, the negative electrode for a three-dimensional integrated package of the present invention is a structure designed based on a semi-spherical surface having a plurality of planes thereon, the apex angles below the plurality of planes being interconnected into a regular polygon. The plane of the regular polygon is parallel to the plane of the designed semi-spherical surface, and the apex angles of the regular polygon are located on the designed semi-spherical surface. Two top apex angles above the plurality of planes are located on the spherical surface where the plane of the designed semi-spherical surface is intersected with the semi-spherical surface. The lines from the center points of the plurality of planes to the center of the designed semi-spherical surface are separately perpendicular to each of the corresponding planes. The plurality of LED chips are separately installed on each plane, and each plane is correspondingly installed with one LED chip. 
         [0016]    Furthermore, the computational formula of the design radius of the structure designed based on a semi-spherical surface of the present invention is as follows: 
         [0000]    
       
         
           
             Ra 
             = 
             
               
                 1 
                 2 
               
                
               
                 ( 
                 
                   L 
                   + 
                   M 
                 
                 ) 
               
                
               
                 
                   
                     
                       
                         1 
                         4 
                       
                        
                       
                         [ 
                         
                           
                             tan 
                              
                             
                               
                                 90 
                                  
                                 
                                   ° 
                                    
                                   
                                     ( 
                                     
                                       n 
                                       - 
                                       2 
                                     
                                     ) 
                                   
                                 
                               
                               n 
                             
                           
                           + 
                           
                             
                               
                                 
                                   ( 
                                   
                                     tan 
                                      
                                     
                                       
                                         90 
                                          
                                         
                                           ° 
                                            
                                           
                                             ( 
                                             
                                               n 
                                               - 
                                               2 
                                             
                                             ) 
                                           
                                         
                                       
                                       n 
                                     
                                   
                                   ) 
                                 
                                 2 
                               
                               + 
                               8 
                             
                           
                         
                         ] 
                       
                     
                     2 
                   
                   + 
                   1 
                 
               
             
           
         
       
     
         [0000]    wherein, L is the size of the edge of the LED chip, M is the spacing between the LED chips, n is the number of LED chips, n≧3, and Ra is the design radius of the electrode designed based on the semi-spherical surface. 
         [0017]    Furthermore, the negative electrode for a three-dimensional integrated package of the present invention is a three-dimensional structure of any shape comprising a plurality of planes. The lines from the center points of the plurality of planes to the designed intersection point are separately perpendicular to each of the corresponding planes. The plurality of LED chips are separately installed on the each plane, and each plane is correspondingly installed with one LED chip. 
         [0018]    Furthermore, the plurality of resistors of the present invention are a plurality of variable resistors. The spectrum of the mixed light can be varied by the manner of varying the resistance value of the plurality of resistors, varying the current through the corresponding LED chips, and controlling the proportion of each monochromatic light in the mixed light. 
         [0019]    Furthermore, light of a plurality of colors emitted by the plurality of LED chips of the present invention generates a spectrogram of solar spectrum-like lighting, insect-repelling LED fluorescent lamp after being well mixed at the designed intersection point; wherein, in the spectrogram, the radiant flux of the wavelength of 530 nm˜590 nm is greater than 50% of the radiant flux of the wavelength of 380 nm˜780 nm. The main peak wavelength of the spectrum has a minimum value of 581 nm, a maximum value of 601 nm, and a median value of 591 nm. The radiant flux of the wavelength of 380 nm˜480 nm is less than 25% of the radiant flux of the wavelength of 380 nm˜780 nm. 
         [0020]    Further, light of a plurality of colors emitted by the plurality of LED chips of the present invention generates a spectrogram of solar spectrum-like myopia prevention LED fluorescent lamps after being well mixed at the designed intersection point, wherein, in the spectrogram, the radiant flux of the wavelength of 530 nm˜590 nm is greater than 50% of the radiant flux of the wavelength of 380 nm˜780 nm. The main peak wavelength of the spectrum has a minimum value of 550 nm, a maximum value of 570 nm, and a median value of 560 nm. The radiant flux of the wavelength of 380 nm˜480 nm is less than 25% of the radiant flux of the wavelength of 380 nm˜780 nm. 
         [0021]    The present invention also provides an LED light source module. The LED light source module applies the LED structure as described hereinbelow. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]    The Examples of the present invention will be further described below with reference to the drawings, wherein: 
           [0023]      FIG. 1  is a structure diagram of the solar spectrum-like LED structure of the present invention; 
           [0024]      FIG. 2  is a structure diagram of Example 1 of the solar spectrum-like LED structure of the present invention; 
           [0025]      FIG. 3  is a spectrogram of the solar spectrum-like plant-growing LED fluorescent lamp provided by Example 1 of the solar spectrum-like LED structure of the present invention; 
           [0026]      FIG. 4  is a structure diagram of Example 2 of the solar spectrum-like LED structure of the present invention; 
           [0027]      FIG. 5  is a spectrogram of the solar spectrum-like LED fluorescent lamp provided by Example 2 of the solar spectrum-like LED structure of the present invention; 
           [0028]      FIG. 6  is a structure diagram of Example 3 of the solar spectrum-like LED structure of the present invention; 
           [0029]      FIG. 7  is a spectrogram of the solar spectrum-like lighting insect-repelling LED fluorescent lamp provided by Example 3 of the solar spectrum-like LED structure of the present invention; 
           [0030]      FIG. 8  is a structure diagram of Example 4 of the solar spectrum-like LED structure of the present invention; and 
           [0031]      FIG. 9  is a spectrogram of the solar spectrum-like myopia prevention LED fluorescent lamp provided by Example 4 of the solar spectrum-like LED structure of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0032]    The present invention will be described in further detail in conjunction with the drawings and specific examples. 
         [0033]    The invention provides a solar spectrum-like LED structure.  FIG. 1  is a structure diagram of the solar spectrum-like LED structure of the present invention, which comprises a negative electrode ( 1 ) for a three-dimensional integrated package, a plurality of LED chips ( 2 ), and a plurality of resistors. The negative electrode ( 1 ) for a three-dimensional integrated package is a three-dimensional structure comprising a plurality of planes. The plurality of LED chips ( 2 ) are installed on the negative electrode ( 1 ) for the three-dimensional integrated package. One end of each of the plurality of resistors is separately connected to the light-emitting surface of the LED chip, and the other end of each of the plurality of resistors is connected to the positive electrode. 
         [0034]    The negative electrode for a three-dimensional integrated package is a structure designed based on a semi-cylindrical surface, a structure designed based on a semi-spherical surface or other arbitrary structure, which is neither a structure designed based on a semi-cylindrical surface nor a structure designed based on a semi-spherical surface and does not block the light continuing to exposure outside. After mixed at the designed intersection point, having a plurality of planes thereon, the lines from the center points of the plurality of planes to the designed intersection point are separately perpendicular to each of the corresponding planes. The plurality of LED chips ( 2 ) are separately installed on each plane, and each plane is correspondingly installed with one LED chip. 
         [0035]    Lights of different colors emitted by the plurality of LED chips form a plane light source or a cone light source after being mixed at the designed intersection point. Based on the above designed structure, the lights of different colors emitted by the plurality of LED chips ( 2 ) are intersected and well mixed at the designed intersection point, thereby emitting a mixed light having a good stability and color-rendering property. 
         [0036]    The negative electrode for a three-dimensional integrated package is a structure designed based on a semi-cylindrical surface. The size of the LED chip is P*L, P≧L, P and L are the sizes of the edge of the chip, the direction of size L is consistent with the circular arc direction of the designed semi-cylindrical surface, the computational formula of the design radius of the electrode designed based on the semi-cylindrical surface is as follows: 
         [0000]    
       
         
           
             Ra 
             = 
             
               
                 1 
                 2 
               
                
               
                 
                   ( 
                   
                     L 
                     + 
                     M 
                   
                   ) 
                 
                 / 
                 sin 
               
                
               
                 
                   90 
                    
                   ° 
                 
                 n 
               
             
           
         
       
     
         [0000]    wherein, L is the size of the edge of the LED chip, M is the spacing between the LED chips, n is the number of the LED chips, and Ra is the design radius of the electrode designed based on the semi-cylindrical surface. 
         [0037]    The negative electrode for a three-dimensional integrated package is a structure designed based on a semi-spherical surface. The size of the LED chip is P*L, P≧L, P and L are the sizes of the edge of the chip. When P=L, the computational formula of the design radius of the structure designed based on the semi-spherical surface is as follows: 
         [0000]    
       
         
           
             Ra 
             = 
             
               
                 1 
                 2 
               
                
               
                 ( 
                 
                   L 
                   + 
                   M 
                 
                 ) 
               
                
               
                 
                   
                     
                       
                         1 
                         4 
                       
                        
                       
                         [ 
                         
                           
                             tan 
                              
                             
                               
                                 90 
                                  
                                 
                                   ° 
                                    
                                   
                                     ( 
                                     
                                       n 
                                       - 
                                       2 
                                     
                                     ) 
                                   
                                 
                               
                               n 
                             
                           
                           + 
                           
                             
                               
                                 
                                   ( 
                                   
                                     tan 
                                      
                                     
                                       
                                         90 
                                          
                                         
                                           ° 
                                            
                                           
                                             ( 
                                             
                                               n 
                                               - 
                                               2 
                                             
                                             ) 
                                           
                                         
                                       
                                       n 
                                     
                                   
                                   ) 
                                 
                                 2 
                               
                               + 
                               8 
                             
                           
                         
                         ] 
                       
                     
                     2 
                   
                   + 
                   1 
                 
               
             
           
         
       
     
         [0000]    wherein, L is the size of the edge of the LED chip, M is the spacing between the LED chips, n is the number of the LED chips, n≧3, and Ra is the design radius of the electrode designed based on the semi-spherical surface. 
         [0038]    The plurality of resistors is a plurality of variable resistors. The spectrum of the mixed light can be varied by the manners of varying the resistance value of the plurality of resistors, varying the current through the corresponding LED chips, varying the radiant flux of each LED, and controlling the proportion of each monochromatic light in the mixed light. Thus, a solar spectrum-like LED fluorescent lamp for generating different bands of spectrums suitable for the survival and metabolism of various organisms can be separately manufactured. 
       Example 1 
       [0039]      FIG. 2  is a structure diagram of Example 1 of the solar spectrum-like LED structure of the present invention, comprising a negative electrode for a three-dimensional integrated package ( 21 ) and a plurality of LED chips ( 22 ). In order to achieve a solar spectrum-like LED spectrogram required for plant growing, the negative electrode for a three-dimensional integrated package was a structure designed based on a semi-cylindrical surface using eight LED chips with different wavelengths. 
         [0040]    The negative electrode for a three-dimensional integrated package ( 21 ) was a structure designed based on the semi-cylindrical surface having a plurality of planes thereon, the lines from the center point of each plane to the center of the designed semi-cylindrical surface were separately perpendicular to each of the corresponding planes. The plurality of LED chips were separately installed on each plane, and each plane was correspondingly installed with one LED chip. The light-emitting surface of the plurality of LED chips ( 22 ) were separately faced toward the center of the designed semi-cylindrical surface. The lines from the center point of each light-emitting surface of LED chips ( 22 ) to the center of the designed semi-cylindrical surface were separately perpendicular to each of the corresponding light-emitting surfaces, and were intersected at the center of the semi-cylindrical surface. The light of different colors emitted by the plurality of LED chips ( 22 ) formed a sector light source at the center of the designed semi-cylindrical surface. 
         [0041]    Eight different LED chips with different wavelengths were normal chips with a size of 0.5×0.5 mm 2 , and their wavelength and the corresponding connected multiple resistors are as follows: 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                   
                 LED11 
                 LED12 
                 LED13 
                 LED14 
                 LED15 
                 LED16 
                 LED17 
                 LED18 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 wavelength 
                 660 
                 637 
                 615 
                 596 
                 560 
                 516 
                 462 
                 398 
               
               
                 (nm) 
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 resistors 
                 R11 
                 R12 
                 R13 
                 R14 
                 R15 
                 R16 
                 R17 
                 R18 
               
               
                   
               
             
          
         
       
     
         [0042]    The spacing between the two planes after the package was M=0.15 mm. 
         [0043]    According to the size of the selected LED chip, the size of the package plane was designed as 0.6×0.6 mm 2 , L=0.6 mm, the thickness of the electrode was designed as 1.4 mm. According to the computational formula of radius of the structure designed based on the semi-cylindrical surface, the radius was calculated as R=1.92 mm. Eight square planes of 0.6×0.6 mm 2  were machined on the electrode designed based on the semi-cylindrical surface ( 21 ), and the spacing between each two planes was 0.15 mm. The lines from the center points of the eight square planes to the center of the designed semi-cylindrical surface were separately perpendicular to each of the corresponding planes. The substrates of the eight LED chips of LED 11 -LED 18  were separately packaged on eight surfaces of the electrodes, and each plane was correspondingly installed with one LED chip. The light-emitting surfaces of LED 11 -LED 18  were separately faced toward the center of the designed semi-cylindrical surface. The light-emitting surfaces of LED 11 -LED 18  were separately connected to the resistors of R 11 -R 18 , and the other end of each of the eight resistors was commonly connected to the positive electrodes of the power source. 
         [0044]    After connecting the line to power, eight lights with different color were emitted by LED chips ( 22 ) of LED 11 -LED 18  with eight wavelengths, and mixed at the center of the designed semi-cylindrical surface to form a sector light source. A suitable plant-growing LED spectrum can be obtained by adjusting the resistance values of resistors of R 11 -R 18 , respectively, and varying the current of LED 11 -LED 18 , respectively, thereby changing the proportions of eight lights in the mixed light.  FIG. 3  shows a plant-growing spectrogram of Example 1 of the solar spectrum-like LED structure. An FMS-6000 light-color-electricity integrated test system was used for testing. As can be seen from  FIG. 3 , the present Example can provide a solar spectrum-like LED spectrum suitable for plant growing. 
         [0045]    It should be noted that the maximum radiant flux of the blue light flux should be the blue light having a wavelength of 440 nm in the spectrogram of the solar spectrum-like LED fluorescent lamp; however, a blue light chip with a wavelength of 440 nm cannot be purchased at home or abroad. However, the present Example can solve this problem well, and provides a solar spectrum-like LED fluorescent lamp suitable for plant growing. 
       Example 2 
       [0046]      FIG. 4  depicts a structure diagram of Example 2 of the solar spectrum-like LED structure of the present invention, comprising a negative electrode for a three-dimensional integrated package ( 31 ) and a plurality of LED chips ( 32 ). In order to achieve a solar spectrum-like LED fluorescent lamp spectrogram, the negative electrode for a three-dimensional integrated package is a structure designed based on a semi-cylindrical surface using nine LED chips with different wavelengths. 
         [0047]    Nine different LED chips with different wavelengths are normal chips with a size of 0.625×0.5 mm 2 , and their wavelength and the corresponding connected multiple resistors are as follows: 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                   
                 LED21 
                 LED22 
                 LED23 
                 LED24 
                 LED25 
                 LED26 
                 LED27 
                 LED28 
                 LED29 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 wavelength 
                 660 
                 635 
                 614 
                 595 
                 572 
                 560 
                 516 
                 462 
                 398 
               
               
                 (nm) 
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 resistors 
                 R22 
                 R22 
                 R23 
                 R24 
                 R25 
                 R26 
                 R27 
                 R28 
                 R29 
               
               
                   
               
             
          
         
       
     
         [0048]    The spacing between the two planes after the package was M=0.15 mm. According to the size of the selected LED chip, the size of the package plane is designed as 0.725×0.6 mm 2 , L=0.6 mm; the thickness of the electrode is designed as 1.6 mm. According to the computational formula of radius of the structure designed based on the semi-cylindrical surface, the radius was calculated as R=2.16 mm. Nine square planes of 0.75×0.6 mm 2  were machined on the electrode designed based on the semi-cylindrical surface, and the spacing between each two planes was 0.15 mm. The lines from the center points of the nine square planes to the center of the designed semi-cylindrical surface were separately perpendicular to each of the corresponding planes. The substrates of the nine LED chips of LED 21 -LED 29  were separately packaged on nine surfaces of the electrodes, and each plane was correspondingly installed with one LED chip. The light-emitting surfaces of LED 21 -LED 29  were separately faced toward the center of the designed semi-cylindrical surface. The light-emitting surfaces of LED 21 -LED 29  were separately connected to the resistors of R 21 -R 29 , and the other end of each of the nine resistors was commonly connected to the positive electrodes of the power source. 
         [0049]    After connecting the line to power, nine lights with different colors were emitted by LED chips ( 32 ) of LED 21 -LED 29  with nine wavelengths, and mixed at the center of the designed semi-cylindrical surface to form a sector light source. A spectrum of solar spectrum-like LED fluorescent lamp can be obtained by adjusting the resistance values of resistors of R 21 -R 29 , respectively, and varying the current of LED 21 -LED 29 , respectively, thereby changing the proportions of nine lights in the mixed light.  FIG. 5  is a spectrogram of the solar spectrum-like LED fluorescent lamp provided by Example 2 of the solar spectrum-like LED structure. An FMS-6000 light-color-electricity integrated test system was used for testing. 
       Example 3 
       [0050]      FIG. 6  illustrates a structure diagram of Example 3 of the solar spectrum-like LED structure of the present invention, comprising a negative electrode for a three-dimensional integrated package ( 41 ) and a plurality of LED chips ( 42 ). In order to achieve a solar spectrum-like lighting insect-repelling LED spectrum, the negative electrode for a three-dimensional integrated package is a structure designed based on the semi-spherical surface using six LED chips with different wavelengths. One chip is located at the center of the bottom of the electrode, thus, n=5. 
         [0051]    The negative electrode for a three-dimensional integrated package is a structure designed based on the semi-spherical surface having a plurality of planes thereon. The apex angles below the plurality of planes were interconnected into a regular polygon. The plane of the regular polygon was parallel to the plane of the designed semi-spherical surface, and the apex angles of the regular polygon were located on the designed semi-spherical surface. Two top apex angles above the plurality of planes were on the spherical surface where the plane of the designed semi-spherical surface was intersected with the semi-spherical surface. The lines from the center points of the plurality of planes to the center of the designed semi-spherical surface were separately perpendicular to each of the corresponding planes. The plurality of LED chips were separately installed on each plane, and each plane was correspondingly installed with one LED chip. A plurality of lights of different colors emitted by the plurality of LED chips formed a cone light source after being mixed at the center of the designed semi-spherical surface. 
         [0052]    Six different LED chips with different wavelengths are normal chips with a size of 0.5×0.5 mm 2 , and their wavelength and the corresponding connected multiple resistors are as follows: 
         [0000]    
       
         
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                   
               
               
                   
                 LED31 
                 LED32 
                 LED33 
                 LED34 
                 LED35 
                 LED36 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 wavelength 
                 635 
                 613 
                 595 
                 560 
                 518 
                 466 
               
               
                 (nm) 
                   
                   
                   
                   
                   
                   
               
               
                 resistors 
                 R31 
                 R32 
                 R33 
                 R34 
                 R35 
                 R36 
               
               
                   
               
             
          
         
       
     
         [0053]    A chip is at the center of the bottom, n=5, the spacing between the two planes after the package is M=0.2 mm. 
         [0054]    According to the size of the selected LED chip, the size of the package plane was designed as 0.6×0.6 mm 2 . Then, L=0.6 mm. According to the computational formula of radius of the structure designed based on the semi-spherical surface, the radius was calculated as R=0.99 mm. Five square planes of 0.6×0.6 mm 2  were machined on the electrode designed based on the semi-spherical surface. Another square of 0.6×0.6 mm 2  was located at the center of the regular pentagon at the bottom of the electrode, and the minimum spacing between each of the two planes was 0.2 mm. The lines from the center points of the six square planes to the center of the designed semi-spherical surface were separately perpendicular to each of the corresponding planes. The substrates of the six LED chips of LED 31 -LED 36  were separately packaged on six square planes, and each plane was correspondingly installed with one LED chip. The light-emitting surfaces of six LED chips were separately faced toward the center of the designed semi-spherical surface. The light-emitting surfaces of the six LED chips of LED 31 -LED 36  were separately connected to the resistors of R 31 -R 36 , and the other end of each of the six resistors was commonly connected to the positive electrodes of the power source. 
         [0055]    After connecting the line to power, six lights with different colors were emitted by LED chips of LED 31 -LED 36  with six wavelengths, and mixed at the center of the designed semi-spherical surface to form a sector light source. A suitable lighting insect-repelling LED fluorescent lamp spectrum can be obtained by adjusting the resistance values of resistors of R 31 -R 36 , and varying the current of LED 31 -LED 36 , respectively, thereby changing the proportions of six lights in the mixed light.  FIG. 7  is a spectrogram of the lighting insect-repelling LED fluorescent lamp provided by Example 3 of the solar spectrum-like LED structure of the present invention. An FMS-6000 light-color-electricity integrated test system was used for testing. It can be seen from  FIG. 7  that the main peak wavelength of the spectrum has a minimum value of 581 nm, a maximum value of 601 nm, and a median value of 591 nm. The radiant flux of the wavelength of 530 nm˜590 nm was greater than 50% of the radiant flux of the wavelength of 380 nm˜780 nm, and the radiant flux of the wavelength of 380 nm˜480 nm was less than 25% of the radiant flux of the wavelength of 380 nm˜780 nm. The present Example can provide a suitable lighting insect-repelling LED fluorescent lamp. 
       Example 4 
       [0056]      FIG. 8  is a structure diagram of Example 4 of the solar spectrum-like LED structure of the present invention, comprising a negative electrode for a three-dimensional integrated package ( 51 ) and a plurality of LED chips ( 52 ). In order to achieve a solar spectrum-like myopia prevention LED fluorescent lamp spectrum, the negative electrode for a three-dimensional integrated package is a structure designed based on the semi-spherical surface using six LED chips with different wavelengths. There was no chip at the bottom, thus, n=6. 
         [0057]    Six different LED chips with different wavelengths are normal chips with a size of 0.5×0.5 mm 2 , and their wavelength and the corresponding connected multiple resistors are as follows: 
         [0000]    
       
         
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                   
               
               
                   
                 LED41 
                 LED42 
                 LED43 
                 LED44 
                 LED45 
                 LED46 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 wavelength 
                 635 
                 615 
                 596 
                 560 
                 518 
                 467 
               
               
                 (nm) 
                   
                   
                   
                   
                   
                   
               
               
                 resistors 
                 R41 
                 R42 
                 R43 
                 R44 
                 R45 
                 R46 
               
               
                   
               
             
          
         
       
     
         [0058]    There was no chip located at the bottom, n=6, and the spacing between the two planes after the package was M=0.15 mm. 
         [0059]    According to the size of the selected LED chip, the size of the package plane was designed as 0.6×0.6 mm 2 . Then, L=0.6 mm. According to the computational formula of the radius of the structure designed based on the semi-spherical surface, the radius was calculated as R=1.02 mm. Six square planes of 0.6×0.6 mm 2  were machined on the electrode designed based on semi-spherical surface, and the minimum spacing between each of the two planes was 0.15 mm. The lines from the center points of the six square planes to the center of the designed semi-spherical surface were separately perpendicular to each of the corresponding planes. The electrode for a three-dimensional integrated package was connected with the negative electrode. The substrates of the six LED chips of LED 41 -LED 46  were separately packaged on six square planes, and each plane was correspondingly installed with one LED chip. The light-emitting surfaces of six LED chips were separately faced toward the center of the designed semi-spherical surface. The light-emitting surfaces of the six LED chips of LED 41 -LED 46  were separately connected to the resistors of R 41 -R 46 , and the other end of each of the six resistors were commonly connected to the same positive electrode of the power source. 
         [0060]    After connecting the line to power, six lights with different colors were emitted by LED chips of LED 41 -LED 46  with six wavelengths, and mixed at the center of the designed semi-spherical surface to form a cone light source. A suitable myopia prevention LED fluorescent lamp spectrum can be obtained by adjusting the resistance values of resistors of R 41 -R 46 , and varying the current of LED 41 -LED 46 , respectively, thereby changing the proportions of six lights in the mixed light.  FIG. 9  illustrates a spectrogram of the myopia prevention LED fluorescent lamp provided by Example 4 of the solar spectrum-like LED structure of the present invention. An FMS-6000 light-color-electricity integrated test system was used for testing. It can be seen from  FIG. 9  that the main peak wavelength of the spectrum has a minimum value of 550 nm, a maximum value of 570 nm, and a median value of 560 nm. The radiant flux of the wavelength of 530 nm˜590 nm was greater than 50% of the radiant flux of the wavelength of 380 nm˜780 nm, and the radiant flux of the wavelength of 380 nm˜480 nm was less than 25% of the radiant flux of the wavelength of 380 nm˜780 nm. The present Example can provide a suitable solar spectrum-like myopia prevention LED fluorescent lamp. 
         [0061]    In the description of the invention, it should be noted that the terms “center of the designed semi-spherical surface,” “center of the designed semi-cylindrical surface,” “center,” “upper,” “lower,” “semi-cylindrical surface,” “semi-spherical surface,” “spacing” and the like indicate a directional and positional relationship based on the drawings, and are only for the purpose of describing the invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific shape, a specific shape structure and operation, and, therefore, cannot be construed as limiting the present invention. “Plane” can be a square plane, or a rectangular plane, or the plane of other shapes, depending on the shape of the selected chips. Unless otherwise expressly stipulated and specified, the terms “install,” “package,” “connect,” “connected,” “machined,” “manufacture,” “manufactured” and the like should be understood in a broad sense. For example, the connection may be a mechanical connection or an electrical connection, either a direct connection or indirectly connected through an intermediate medium or an internal connection of the two elements. It will be apparent to those skilled in the art that the specific meaning of the above terms in the present invention may be understood according to the particular situation. In addition, unless otherwise specified, in the description of the present invention, the meaning of “a plurality of” is two or more. 
         [0062]    The specific embodiments of the invention described above are not to be construed as limiting the scope of the invention. Any other changes and modifications that may be made in accordance with the technical concept of the invention are intended to be included within the scope of the appended claims.