CN112788807A

CN112788807A - Integrated LED light source preparation device and method for agricultural pest control

Info

Publication number: CN112788807A
Application number: CN202011618072.4A
Authority: CN
Inventors: 牛宏强; 梁革梅; 柯强
Original assignee: Ningbo Sunpu Led Co ltd
Current assignee: Ningbo Sunpu Led Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-11
Anticipated expiration: 2040-12-30
Also published as: CN112788807B

Abstract

The invention discloses an integrated LED light source preparation device for agricultural pest control, which comprises a working plate, wherein the bottom of the working plate is provided with a damping mechanism, the top of the working plate is provided with a moving mechanism, the middle part of the working plate is provided with a first fixing frame, a liquid feeding mechanism is arranged inside the first fixing frame, the top of the first fixing frame is provided with a conveying mechanism, one end of the working plate, far away from the first fixing frame, is provided with a second fixing frame, a stirring mechanism is arranged inside the second fixing frame, the bottom of the stirring mechanism is provided with an adjusting mechanism, the stirring mechanism comprises a stirring motor, the stirring motor is fixedly connected to the top of the second fixing frame, the vibration of the device is reduced through the damping mechanism, the aim of crystal fixation is achieved through the moving mechanism, the stirring of sol is assisted through the stirring mechanism, different numbers of sol tanks are convenient to replace through the threaded connection of the stirring motor, multiple color temperatures are integrated onto a small-sized LED light source substrate.

Description

Integrated LED light source preparation device and method for agricultural pest control

Technical Field

The invention relates to the technical field of LED light sources, in particular to a device and a method for preparing an integrated LED light source for agricultural pest control.

Background

With the increasing living standard of people, people begin to pay attention to the problem of food safety. Currently, pesticide residue has become a primary problem for agricultural product and food safety. In order to realize the quality safety of agricultural products and food, the biological protection technology without or with little chemical pesticide in the agricultural production link comprises the integrated control technology combining agricultural control, biological control, physical control and the like. The light insect attraction is a physical control method with the lowest cost, the least labor, the best effect and the least side effect. A large number of researches show that the LED light source with multiple wavelengths or multiple color temperatures has remarkable pest trapping and killing effects. The LED insecticidal lamp utilizes phototactic wave-seeking characteristics of pests, and applies the frequency vibration wave as a new technology for trapping and killing adult pests to an insect killing apparatus.

Most of the existing LED light sources are single color temperature or two mixed color temperatures, and the insecticidal lamp manufactured by the LED light sources cannot meet the high-efficiency trapping and killing requirements on various pests. In order to meet the requirements of a multi-color temperature scene, a plurality of LEDs with different single color temperatures are required to be combined for realization, but special processing equipment capable of producing the integrated LEDs with the multi-color temperatures is absent in the market at present, so that the multi-color temperature LED light source is high in manufacturing difficulty, high in manufacturing cost and low in production efficiency.

Therefore, it is urgently needed to provide an integrated LED light source preparation device for agricultural pest control.

Disclosure of Invention

The invention provides an integrated LED light source preparation device and a method for agricultural pest control, wherein the device reduces the vibration of the device through a damping mechanism, achieves the purpose of crystal fixation through a moving mechanism, helps the stirring of sol through a stirring mechanism, is in threaded connection with a rotating shaft through a stirring motor, is convenient to replace sol tanks with different quantities, achieves the purpose of manufacturing LEDs with different color temperatures, integrates multiple color temperatures on a small-sized LED light source substrate, and is convenient to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: an integrated LED light source preparation device for agricultural pest control comprises a working plate, wherein a damping mechanism is arranged at the bottom of the working plate, a moving mechanism is arranged at the top of the working plate, a first fixing frame is arranged in the middle of the working plate, a liquid feeding mechanism is arranged inside the first fixing frame, a conveying mechanism is arranged at the top of the first fixing frame, a second fixing frame is arranged at one end, away from the first fixing frame, of the working plate, a stirring mechanism is arranged inside the second fixing frame, an adjusting mechanism is arranged at the bottom of the stirring mechanism, the stirring mechanism comprises a stirring motor, the stirring motor is fixedly connected to the top of the second fixing frame, a rotating shaft is in threaded connection with the output end of the stirring motor, a driving gear is fixedly connected to the rotating shaft, a driven gear is in meshing connection with the driving gear, one end, away from, the improved spinning machine is characterized in that the top and the bottom of the driving gear are movably connected with first fixing plates, the bottom of each first fixing plate is fixedly connected with a sol tank, the bottom of each sol tank is fixedly connected with a discharge pipe, and a rotating shaft is in threaded connection with a photomask plate placing block.

In a further embodiment, the damping mechanism comprises a supporting block, the supporting block is fixedly connected to the bottom of the working plate, a supporting column is fixedly connected to the bottom of the supporting block, an extrusion block is fixedly connected to the top of the supporting column, a damping column is inserted into one end, far away from the supporting block, of the extrusion block, a limiting plate is fixedly connected to the inside of the damping column, a spring is fixedly connected to the top of the limiting plate, and an oil return cavity is formed in the bottom of the limiting plate by the damping column.

In a further embodiment, the moving mechanism comprises a sliding groove, the sliding groove is formed in the top of the working plate, a servo motor is fixedly connected to one end inside the sliding groove, a threaded shaft is fixedly connected to the output end of the servo motor, a sliding block is connected to the threaded shaft in a threaded mode, and a base plate is inserted into the top of the sliding block.

In a further embodiment, the liquid feeding mechanism includes a first electric push rod, the first electric push rod is fixedly connected to the bottom of the first fixing frame, a storage tube is fixedly connected to the bottom of the first electric push rod, a push plate is fixedly connected to an output end of the first electric push rod, the storage tube is inserted into the bottom of the push plate, and a first dropper is fixedly connected to the bottom of the storage tube.

In a further embodiment, conveying mechanism includes the bin, bin fixed connection is at first mount top, bin top fixedly connected with inlet pipe, the inside fixedly connected with water pump of bin, the feed inlet has been seted up to water pump one end, the water pump is close to feed inlet one end fixedly connected with discharging pipe.

In a further embodiment, the adjusting mechanism comprises a second fixing plate, a second electric push rod is fixedly connected inside the second fixing plate, an output end of the second electric push rod is fixedly connected with a telescopic rod, the telescopic rod is far away from a movable tank fixedly connected with the second electric push rod, and a second dropper is fixedly connected to the bottom of the movable tank.

In a further embodiment, the teeth of a cogwheel have been seted up to the spacing ring inside, first fixed plate has driven gear through loose axle swing joint, the row of glue tank bottom is managed through rotary joint fixedly connected with, the optical mask version is kept away from in the pivot is placed a one end swing joint and is had the second fixed plate.

In a further embodiment, the extrusion block is of a trapezoid structure, an inner cavity is formed in the support column, damping oil is filled in the support column, the shape of the limiting plate is matched with that of the extrusion block, an oil through hole is formed in the limiting plate, and a sealing ring is fixedly connected to the top of the support column.

Preferably, the use method of the integrated LED light source preparation device for agricultural pest control based on the above method comprises the following steps:

s1, firstly, driving an LED assembly to move to the bottom of a first fixing frame by opening a moving mechanism, and conveying a solution by a liquid conveying mechanism and a liquid conveying mechanism to perform die bonding on the LED assembly;

s2, conveying the LED assembly to the bottom of a second fixing frame through a moving mechanism, and driving a photomask plate to be placed on the LED assembly while stirring the multicolor thermosol through a stirring mechanism;

and S3, finally, driving the multi-color-temperature sol to drop into the LED assembly through the adjusting mechanism, so that the multi-color-temperature LED is conveniently prepared.

The invention has the following beneficial effects:

1. the device passes through the supporting shoe of working plate extrusion damper, and on the supporting shoe was extrudeing the spring through the extrusion piece, when the extrusion piece moved in the shock attenuation post, extrusion damping oil entered into back to the oil chamber through the limiting plate, through atmospheric pressure for during damping oil got back to original inner chamber, reduced the vibrations of device.

2. Through opening moving mechanism's servo motor, drive the screw shaft rotation, the slider at screw shaft top moves to first mount bottom, then opens the first electric putter of sending liquid mechanism, and the push pedal extrusion solution of first electric putter bottom fixed connection drips through first burette, enters into on the base plate, and the base plate continues to move, and first burette constantly drips into, is convenient for carry out solid brilliant.

3. Through the agitator motor who opens rabbling mechanism, it is rotatory to drive the pivot, and fixed connection's driving gear is rotatory in the pivot, and the meshing is connected with driven gear rotatory on the driving gear, and driven gear bottom fixed connection's sol jar is rotatory, constantly stirs the sol, the stirring of the sol of being convenient for.

4. Through agitator motor and pivot threaded connection, be convenient for change the sol jar of different quantity, reach the purpose of making different quantity colour temperature LED, integrate the polychrome temperature on small-size LED light source base plate.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic front cross-sectional structural view of the present invention;

FIG. 2 is a schematic front view of the stirring mechanism of the present invention;

FIG. 3 is a schematic view of the top surface of the retainer ring of the present invention;

FIG. 4 is a side sectional structural schematic view of the fluid delivery mechanism of the present invention;

FIG. 5 is a side cross-sectional structural schematic view of the adjustment mechanism of the present invention;

FIG. 6 is a schematic cross-sectional view of the delivery mechanism of the present invention;

FIG. 7 is a schematic diagram of the top surface structure of the substrate of the present invention.

In the figure: 1. a working plate; 2. a damping mechanism; 21. a support block; 22. a support pillar; 23. extruding the block; 24. a shock-absorbing post; 25. a spring; 26. a limiting plate; 27. an oil return cavity; 3. a moving mechanism; 31. a sliding groove; 32. a servo motor; 33. a threaded shaft; 34. a slider; 35. a substrate; 4. a first fixing frame; 5. a liquid feeding mechanism; 51. a first electric push rod; 52. a storage tube; 53. pushing the plate; 54. a first dropper; 6. a conveying mechanism; 61. a storage tank; 62. a feed pipe; 63. a water pump; 64. a feed inlet; 65. a discharge pipe; 7. a second fixing frame; 8. a stirring mechanism; 81. a stirring motor; 82. a rotating shaft; 83. a driving gear; 84. a driven gear; 85. a limiting ring; 86. a first fixing plate; 87. a sol tank; 88. a discharge pipe; 89. a photomask plate placing block; 9. an adjustment mechanism; 91. a second fixing plate; 92. a second electric push rod; 93. a telescopic rod; 94. a movable tank; 95. a second dropper.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in figures 1-7, the integrated LED light source preparation device for agricultural pest control provided by the invention comprises a working plate 1, a damping mechanism 2 is arranged at the bottom of the working plate 1, so as to reduce the vibration of the device and prevent the device from being damaged due to vibration when in use, a moving mechanism 3 is arranged at the top of the working plate 1, so as to drive a base plate 35 to move to a proper position, a first fixing frame 4 is arranged at the middle part of the working plate 1, a liquid feeding mechanism 5 is arranged inside the first fixing frame 4, so as to facilitate the transportation of liquid for crystal fixation, a conveying mechanism 6 is arranged at the top of the first fixing frame 4, so as to facilitate the addition and the transportation of solution, a second fixing frame 7 is arranged at one end of the working plate 1, which is far away from the first fixing frame 4, a stirring mechanism 8 is arranged inside the second fixing frame 7, so that the stirring mechanism 8 can drive a, the position convenient for adjusting the dropping sol is used for dropping the sol with different color temperatures onto the substrate 35, the stirring mechanism 8 comprises a stirring motor 81, the stirring motor 81 is fixedly connected with the top of the second fixing frame 7, the output end of the stirring motor 81 is in threaded connection with a rotating shaft 82, the rotating shaft 82 is fixedly connected with a driving gear 83, the driving gear 83 is in meshed connection with a driven gear 84, one end of the driven gear 84, which is far away from the driving gear 83, is in meshed connection with a limiting ring 85, the top and the bottom of the driving gear 83 are movably connected with a first fixing plate 86, the bottom of the first fixing plate 86 is fixedly connected with a sol tank 87, the bottom of the sol tank 87 is fixedly connected with a discharging pipe 88, the rotating shaft 82 is in threaded connection with a photomask plate placing block 89, the rotating shaft 82 is driven to rotate by the stirring motor 81, so that the, LED used for realizing more temperature difference effects.

Damper 2 includes supporting shoe 21, supporting shoe 21 fixed connection is in 1 bottom of working plate, supporting shoe 21 bottom fixedly connected with support column 22, support column 22 top fixedly connected with extrusion piece 23, extrusion piece 23 is kept away from 21 one end pegs graft of supporting shoe and is had shock attenuation post 24, the inside fixedly connected with limiting plate 26 of shock attenuation post 24, limiting plate 26 top fixedly connected with spring 25, through spring 25, realize the shock attenuation of device, oil return chamber 27 has been seted up to shock attenuation post 24 bottom limiting plate 26, extrude damping oil through extrusion piece 23 and enter into oil return chamber 27, reduce the vibrations of device.

Moving mechanism 3 includes sliding tray 31, and sliding tray 31 is seted up at 1 top of working plate, and the inside one end fixedly connected with servo motor 32 of sliding tray 31, the servo motor 32's of being convenient for is fixed, and servo motor 32 output end fixedly connected with threaded shaft 33, threaded connection has slider 34 on the threaded shaft 33, and it has base plate 35 to peg graft at slider 34 top, drives slider 34 through servo motor 32 and removes, and the dismantlement and the taking out of base plate 35 of being convenient for.

Send liquid mechanism 5 to include first electric putter 51, first electric putter 51 fixed connection is in 4 bottoms of first mount, first electric putter 51 bottom fixedly connected with storage tube 52, first electric putter 51 output end fixedly connected with push pedal 53, it has storage tube 52 to peg graft in push pedal 53 bottom, storage tube 52 bottom fixedly connected with first buret 54, drive push pedal 53 through first electric putter 51 and remove, extrude the inside solution of storage tube 52, the solid brilliant of base plate 35 of being convenient for.

Conveying mechanism 6 includes bin 61, bin 61 fixed connection is at 4 tops of first mount, bin 61 top fixedly connected with inlet pipe 62, the inside fixedly connected with water pump 63 of bin 61, feed inlet 64 has been seted up to water pump 63 one end, water pump 63 is close to feed inlet 64 one end fixedly connected with discharging pipe 65, through the valve on the feed inlet 64, the feeding of being convenient for prevents inside the dust access device.

Adjustment mechanism 9 includes second fixed plate 91, the inside fixedly connected with second electric putter 92 of second fixed plate 91, second electric putter 92 output fixedly connected with telescopic link 93, second electric putter 92 fixedly connected with activity jar 94 is kept away from to telescopic link 93, activity jar 94 bottom fixedly connected with second burette 95 drives activity jar 94 through second electric putter 92 and removes suitable position, is convenient for constantly instil into the sol to base plate 35 is inside.

The inside teeth of a cogwheel of having seted up of spacing ring 85, first fixed plate 86 has driven gear 84 through loose axle swing joint, and driven gear 84 of being convenient for is rotatory, and the sol, sol jar 87 bottom arrange material pipe 88 through rotary joint fixedly connected with, and the optical mask version is kept away from to pivot 82 places piece 89 one end swing joint and has second fixed plate 91, prevents the rotation of second fixed plate 91.

Extrusion piece 23 is the trapezium structure, and the inner chamber has been seted up to support column 22 inside, and support column 22 is inside to be filled has damping oil, the vibrations of the reducing mechanism of being convenient for, and limiting plate 26 shape suits with extrusion piece 23, is convenient for extrude damping oil, has seted up the oil through hole on the limiting plate 26, and support column 22 top fixedly connected with sealing washer increases the leakproofness of device, prevents to get into the air, prevents the oil leak.

The invention discloses a use method of an integrated LED light source preparation device for agricultural pest control, which comprises the following steps:

s1, firstly, driving an LED assembly to move to the bottom of a first fixing frame 4 by opening a moving mechanism 3, and conveying a solution through a liquid conveying mechanism 5 and a liquid conveying mechanism 6 to carry out die bonding on the LED assembly;

s2, conveying the LED assembly to the bottom of a second fixing frame 7 through a moving mechanism 3, and driving a photomask plate to be placed on the LED assembly while stirring the multicolor thermosol through a stirring mechanism 8;

and S3, finally, driving the multicolor lukesol to drop onto the LED assembly through the adjusting mechanism 9, so as to be convenient for preparing the multicolor temperature LED.

Specifically, when the invention is used, firstly, the supporting block 21 of the damping mechanism 2 is extruded through the working plate 1, the supporting block 21 extrudes the spring 25 through the extruding block 23, the extruding block 23 extrudes damping oil to enter the oil return cavity 27 through the limiting plate 26 while moving in the damping column 24, the damping oil is returned to the original inner cavity through air pressure to reduce the vibration of the device, then the substrate 35 with the LED assembly is placed at the top of the slide block 34, the movement of the substrate 35 is limited through the positioning pin, the servo motor 32 of the moving mechanism 3 is opened to drive the threaded shaft 33 to rotate, the slide block 34 at the top of the threaded shaft 33 is moved to the bottom of the first fixing frame 4, then the first electric push rod 51 of the liquid feeding mechanism 5 is opened, the push plate 53 fixedly connected with the bottom of the first electric push rod 51 extrudes the solution to drip through the first drip tube 54 to enter the substrate 35, the substrate 35 continuously moves, and the first drip tube 54 is continuously, carrying out die bonding, pulling back the push plate 53, opening the water pump 63 of the conveying mechanism 6, driving the water pump 63 to pump a solution through the feed inlet 64, entering the discharge pipe 65, entering the storage pipe 52 for storage, then conveying the substrate 35 to the bottom of the second fixed mount 7, opening the stirring motor 81 of the stirring mechanism 8, driving the rotating shaft 82 to rotate, rotating the driving gear 83 fixedly connected with the rotating shaft 82, engaging and connecting the driving gear 83 with the driven gear 84 to rotate, rotating the sol tank 87 fixedly connected with the bottom of the driven gear 84, continuously stirring the sol, driving the photomask plate placing block 89 in threaded connection with the rotating shaft 82 to move downwards, placing the photomask plate on the top of the substrate 35, finally opening the second electric push rod 92 of the adjusting mechanism 9, driving the telescopic rod 93, enabling the second dropper 95 at the bottom of the movable tank 94 to move to the top of the substrate 35, and continuously dropping different second droppers 95 onto the LED assembly at the top of the substrate 35, to manufacture a multi-color temperature LED.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Integrated LED light source preparation device for agricultural pest control is characterized by comprising a working plate (1), wherein a damping mechanism (2) is arranged at the bottom of the working plate (1), a moving mechanism (3) is arranged at the top of the working plate (1), a first fixing frame (4) is arranged in the middle of the working plate (1), a liquid feeding mechanism (5) is arranged inside the first fixing frame (4), a conveying mechanism (6) is arranged at the top of the first fixing frame (4), a second fixing frame (7) is arranged at one end, far away from the first fixing frame (4), of the working plate (1), a stirring mechanism (8) is arranged inside the second fixing frame (7), an adjusting mechanism (9) is arranged at the bottom of the stirring mechanism (8), the stirring mechanism (8) comprises a stirring motor (81), and the stirring motor (81) is fixedly connected to the top of the second fixing frame (7), agitator motor (81) output end threaded connection has pivot (82), fixedly connected with driving gear (83) is gone up in pivot (82), the meshing is connected with driven gear (84) on driving gear (83), driven gear (84) are kept away from driving gear (83) one end meshing and are connected with spacing ring (85), driving gear (83) top and bottom swing joint have first fixed plate (86), first fixed plate (86) bottom fixedly connected with sol jar (87), sol jar (87) bottom fixedly connected with arranges material pipe (88), threaded connection has the optical mask version to place piece (89) on pivot (82).

2. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein the shock absorption mechanism (2) comprises a supporting block (21), the supporting block (21) is fixedly connected to the bottom of the working plate (1), a supporting column (22) is fixedly connected to the bottom of the supporting block (21), an extrusion block (23) is fixedly connected to the top of the supporting column (22), a shock absorption column (24) is inserted into one end, away from the supporting block (21), of the extrusion block (23), a limiting plate (26) is fixedly connected to the inside of the shock absorption column (24), a spring (25) is fixedly connected to the top of the limiting plate (26), and an oil return cavity (27) is formed in the bottom of the limiting plate (26) by the shock absorption column (24).

3. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein the moving mechanism (3) comprises a sliding groove (31), the sliding groove (31) is formed in the top of the working plate (1), one end of the inner portion of the sliding groove (31) is fixedly connected with a servo motor (32), the output end of the servo motor (32) is fixedly connected with a threaded shaft (33), a sliding block (34) is connected to the threaded shaft (33) in a threaded mode, and a base plate (35) is connected to the top of the sliding block (34) in an inserted mode.

4. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein the liquid feeding mechanism (5) comprises a first electric push rod (51), the first electric push rod (51) is fixedly connected to the bottom of the first fixing frame (4), a storage pipe (52) is fixedly connected to the bottom of the first electric push rod (51), a push plate (53) is fixedly connected to the output end of the first electric push rod (51), the storage pipe (52) is inserted into the bottom of the push plate (53), and a first dropper (54) is fixedly connected to the bottom of the storage pipe (52).

5. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein the conveying mechanism (6) comprises a storage box (61), the storage box (61) is fixedly connected to the top of the first fixing frame (4), a feeding pipe (62) is fixedly connected to the top of the storage box (61), a water pump (63) is fixedly connected to the inside of the storage box (61), a feeding hole (64) is formed in one end of the water pump (63), and a discharging pipe (65) is fixedly connected to one end, close to the feeding hole (64), of the water pump (63).

6. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein the adjusting mechanism (9) comprises a second fixing plate (91), a second electric push rod (92) is fixedly connected inside the second fixing plate (91), an expansion link (93) is fixedly connected to the output end of the second electric push rod (92), the expansion link (93) is far away from the second electric push rod (92) and is fixedly connected with a movable tank (94), and a second dropper (95) is fixedly connected to the bottom of the movable tank (94).

7. The integrated LED light source preparation device for agricultural pest control according to claim 1, wherein gear teeth are formed in the limiting ring (85), the first fixing plate (86) is movably connected with a driven gear (84) through a movable shaft, the bottom of the sol tank (87) is fixedly connected with a discharge pipe (88) through a rotary joint, and one end, far away from the photomask plate placing block (89), of the rotary shaft (82) is movably connected with a second fixing plate (91).

8. The integrated LED light source preparation device for agricultural pest control according to claim 2, wherein the extrusion block (23) is of a trapezoidal structure, an inner cavity is formed in the support column (22), damping oil is filled in the support column (22), the limiting plate (26) is matched with the extrusion block (23) in shape, an oil through hole is formed in the limiting plate (26), and a sealing ring is fixedly connected to the top of the support column (22).

9. An application method of the integrated LED light source preparation device for agricultural pest control according to any one of claims 1 to 8, characterized by comprising the following steps:

s1, firstly, driving an LED assembly to move to the bottom of a first fixing frame (4) by opening a moving mechanism (3), and conveying a solution through a liquid conveying mechanism (5) and a liquid conveying mechanism (6) to solidify the LED assembly;

s2, conveying the LED assembly to the bottom of a second fixing frame (7) through a moving mechanism (3), and driving a photomask plate to be placed on the LED assembly while stirring the multicolor thermosol through a stirring mechanism (8);

and S3, finally, driving the multi-color-temperature sol to drop into the LED assembly through the adjusting mechanism (9), so that the multi-color-temperature LED is conveniently prepared.