LED light source packaging structure with high light efficiency and high heat conduction and manufacturing process thereof
Technical Field
The invention relates to the technical field of LED light sources, in particular to a high-light-efficiency high-heat-conductivity LED light source packaging structure and a manufacturing process thereof.
Background
LEDs have been developed to date in various fields, and have been increasingly used in automobiles in recent years, and the types of LED light sources for use in automobiles have been increasing, for example, a plurality of types including brake lights, reading lights, turn lights, night driving lights, and car headlamps. At present, the existing LED light source generates heat during illumination, so that silica gel with fluorescent powder is aged, the light transmittance of the LED light source is poor, the service life of the LED light source is influenced, and meanwhile, the existing LED light source is inconvenient to detach during use, so that workers cannot maintain and replace the LED light source;
The patent number is a stable in structure 'CN 202022732778.5' LED light source packaging structure, which comprises a base, integrated into one piece has the mount pad on the outer wall of base top, and the mount pad internally mounted has the reflector, installs the light source core that is located the reflector inside through the bolt on the inner wall of mount pad bottom, has seted up the draw-in groove on the outer wall of mount pad top, and the inside lens, fluorescent wafer, the glass piece that are the upper and lower structure distribution of settling respectively of draw-in groove, fluorescent wafer is located between lens and the glass piece, threaded connection has the protection casing on the mount pad side outer wall. When the LED light source is used, the fluorescent powder mixed by the prior silica gel is replaced by the fluorescent wafer, so that the influence on the service life of the LED light source caused by aging of the silica gel can be avoided, and when the LED light source is maintained, a worker can twist off the protective cover and then take out the lens, the fluorescent wafer and the glass sheet from the inside of the clamping groove, thereby being convenient for the worker to maintain and replace the light source core;
According to the technical scheme, the purpose of disassembly and assembly overhauling can be achieved in the using process during the use period, but the internal heat dissipation structure is extremely simple in the using period, the LED light source is extremely easy to generate higher temperature in the high-temperature environment or long-time use process, so that the service life of the LED light source is influenced, and the LED light source is short of a better protection function and low in service life during the use period, so that the LED light source needs to be improved.
Therefore, we propose a high-light-efficiency high-heat-conductivity LED light source packaging structure and a manufacturing process thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide an LED light source packaging structure with high light efficiency and high heat conduction and a manufacturing process thereof, so as to solve the problem that the existing LED light source packaging structure in the background art lacks a better heat dissipation protection function.
In order to achieve the above object, in a first aspect, the present invention provides a high-light-efficiency and high-heat-conductivity LED light source packaging structure, which comprises a bottom plate and a protection mechanism, wherein a heat dissipation seat is fixedly installed at the top of the bottom plate, both sides of the protection mechanism are provided with installation mechanisms, the protection mechanism is installed at the top of the heat dissipation seat through the installation mechanisms, the inner side of the top of the heat dissipation seat is in threaded connection with a light source seat, a light source core is arranged in the middle of the top of the light source seat, a light condensation cover is arranged at the outer side of the light source core at the top of the light source seat, and heat dissipation fins are fixedly installed at the bottom of the light source seat;
The heat dissipation seat comprises a fixing frame, a thread groove is formed in the middle of the fixing frame, the light source seat is connected to the inner side of the thread groove in a threaded mode, a heat dissipation coil is arranged in the inner bottom of the thread groove of the fixing frame, a circulating pump is arranged on one side of the heat dissipation coil, and the top of the heat dissipation coil is connected with the bottom of the heat dissipation fin in a fitting mode.
In a further embodiment, a first rubber ring is fixedly installed at the bottom of the light source seat, and the bottom of the first rubber ring is in fit connection with the top of the fixed frame.
In a further embodiment, a hexagonal cover is fixedly arranged at the bottom of the fixing frame and fixedly arranged at the top of the bottom plate, radiating windows are formed in the outer side of the hexagonal cover at equal intervals, and radiating fans are arranged on the inner sides of the radiating windows.
In a further embodiment, heat dissipation holes are formed in the bottom of the fixing frame at equal intervals, and the bottoms of the heat dissipation holes penetrate through the fixing frame.
In a further embodiment, the protection mechanism comprises a top frame, buffer springs are fixedly arranged on the outer side of the top frame at equal intervals, dampers are arranged on the inner sides of the buffer springs, and a protection cover is fixedly arranged on the top of the buffer springs.
In a further embodiment, the top of the top frame is located at the inner side of the buffer spring and is fixedly provided with an inner lens cover, the mounting mechanisms are arranged at two sides of the top frame, and the top frame is mounted at the top of the fixed frame through the mounting mechanisms.
In a further embodiment, the installation mechanism comprises a clamping groove and a concave frame, the concave frame is fixedly installed on two sides of the top frame, the clamping groove is formed in two sides of the fixed frame, the concave frame is sleeved at the upper end of the fixed frame, limiting springs are fixedly installed on the inner sides of the concave frame, clamping blocks are fixedly installed on the inner ends of the limiting springs, and the inner sides of the clamping blocks penetrate through the top frame and are inserted into the inner sides of the clamping grooves.
In a further embodiment, a connecting shaft is fixedly arranged on the outer side of the clamping block, and a pull handle is fixedly arranged at the outer end of the connecting shaft penetrating through the concave frame.
In a further embodiment, the bottom of the top frame is fixedly provided with a second rubber ring, and the outer side of the top of the fixed frame is provided with a sealing arc groove.
In a second aspect, the invention provides a manufacturing process of an LED light source packaging structure with high light efficiency and high heat conduction, which comprises the following steps:
Step one: preparing a substrate of a light source seat, wherein the outside of the light source seat is a polyphenylene sulfide heat-resistant plastic shell, the inside of the light source seat is an aluminum substrate, a gold deposition process and a nickel plating process are adopted for an LED functional area in the process of manufacturing the aluminum substrate, the reliability of bonding wires of the functional area is ensured, a layer of copper is coated on the aluminum substrate at the moment, then a PCB is mounted on the top of the aluminum substrate, and at the moment, a circuit pattern of an LED chip is manufactured through a photoetching technology;
step two: all electronic components are welded and fixed according to the character positions of the printing elements corresponding to the PCB on the aluminum substrate, and after the welding and fixing are finished, the lamp beads of the light source core are mounted on the PCB on the top of the aluminum substrate;
Step three: welding an LED chip on a circuit pattern on an aluminum substrate, coating a heat conducting layer such as a graphene heat conducting film on the LED chip, and performing injection molding on all parts of the residual mounting mechanism and the protection mechanism by adopting a die;
Step four: the inner lens cover is arranged above the light source core, so that the inner lens cover is ensured not to be in contact with the LED chip, the inner lens cover is an optical lens, and each part of the installation mechanism and the protection mechanism is cooled and then is accommodated and kept for assembly;
Step five: coating a layer of packaging adhesive between the inner lens cover and the heat conducting layer, then placing the whole structure into curing equipment for curing, using a die bonder to bond the aligned light source cores, baking after die bonding is finished to enable the LED wafer to be completely combined with the surface of the PCB crystal track, and adopting a gold wire ball welding process to weld the completely fixed chip, wherein the baking temperature is 160 ℃ and the baking time is 1.5H;
step six: testing the PCB on the aluminum substrate by using a PLC tester;
Step seven: dispensing holes of the mask by using a high-precision dispensing machine and high-performance photoelectric silica gel so as to achieve LED chip packaging;
Step eight: curing at normal temperature according to the curing characteristic of the adhesive to form a stable lens, sealing and packaging the LED functional area, and curing at normal temperature;
Step nine: retesting the cured LED light source;
step ten: and performing appearance inspection cleaning on the LED display panel after the test grading.
Compared with the prior art, the invention has the beneficial effects that:
Firstly, in the invention, through setting up protection machanism, when making the light source during the use, when the protection casing at top of the top frame receives the striking, through buffer spring and attenuator cooperation this moment, can carry out supplementary buffering to it, and then reached better buffering protection effect, set up second rubber ring and sealed arc groove, during the use second rubber ring laminating can play better sealed effect in sealed arc groove for the light source has better buffering protection function.
According to the invention, the heat radiating seat is arranged, so that the light source conducts heat to the light source seat through the auxiliary heat radiating fins during the use period of the light source, heat generated when the light source core emits light can be rapidly led out, the heat radiating fins are further conducted and radiated through the heat radiating coil, the circulating pump operates at the moment, cooling liquid in the heat radiating coil can be driven to circularly flow, the heat radiating fan is started to operate at the moment, air enters through the heat radiating window and is discharged through the heat radiating holes, a good heat radiating effect is achieved, heat on the heat radiating coil, the heat radiating fins and the light source seat can be rapidly led out, high-efficiency heat radiating capacity is achieved, and a good heat radiating function is achieved.
Thirdly, in the invention, through setting up installation mechanism, make the light source in the use, the accessible spacing spring contradicts the fixture block and inserts to the draw-in groove inboard, and then alright supplementary installing the top frame to the top of fixed frame, laminating to the top of fixed frame through first rubber ring this moment, and then reach better protection sealing ability, in the use, when needing to dismantle the maintenance, the accessible pulling draws the axle to drive the fixture block and outwards remove, the fixture block breaks away from the draw-in groove inboard this moment, and then be convenient for take out the top frame from the top of fixed frame, because the light source seat adopts threaded connection to the screw thread inslot this moment, can reverse the light source seat, make things convenient for the light source seat quick assembly and disassembly of light source to change and maintenance, make this light source seat wholly use comparatively convenient, the practicality is stronger.
Drawings
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is a block diagram of a protective mechanism according to the present invention;
FIG. 4 is a diagram of a heat sink base according to the present invention;
FIG. 5 is a bottom view of the light source base of the present invention;
FIG. 6 is a bottom view of the heat sink according to the present invention;
FIG. 7 is a bottom view of the guard mechanism of the present invention;
fig. 8 is an enlarged view of fig. 6 at a in the present invention.
In the figure: 1. a bottom plate; 2. a protective mechanism; 21. a top frame; 22. a buffer spring; 23. a damper; 24. a protective cover; 25. an inner lens cover; 26. the second rubber ring; 27. sealing the arc groove; 3. a heat dissipation seat; 31. a fixed frame; 32. a thread groove; 33. a heat dissipation coil; 34. a circulation pump; 35. a hexagonal cover; 36. a heat radiation window; 37. a heat radiation fan; 38. a heat radiation hole; 4. a light source core; 5. a mounting mechanism; 51. a clamping groove; 52. a concave frame; 53. a limit spring; 54. a clamping block; 55. a connecting shaft; 56. a pull handle; 6. a light source base; 7. a first rubber ring; 8. a heat radiation fin; 9. a light-gathering cover.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, in the embodiment of the invention, a high-light-efficiency high-heat-conductivity LED light source packaging structure is disclosed, the voltage of the light source is 2-4V, the adaptive current is 20-30mA, the viewing angle of the LED lamp can be 30 degrees, 60 degrees, 120 degrees and the like, the light source structure adopts COB packaging, the adaptive working temperature of the LED light source is between-40 ℃ and 85 ℃, the waterproof grade of the LED light source is IP67 or IP68 standard, the structure comprises a bottom plate 1 and a protection mechanism 2, a heat dissipation seat 3 is fixedly arranged at the top of the bottom plate 1, mounting mechanisms 5 are arranged at both sides of the protection mechanism 2, the protection mechanism 2 is arranged at the top of the heat dissipation seat 3 through the mounting mechanisms 5, a light source seat 6 is connected with the inner side threads at the top of the heat dissipation seat 3, a light source core 4 is arranged in the middle of the top of the light source seat 6, a light condensation cover 9 is arranged at the outer side of the light source core 4, and a heat dissipation fin 8 is fixedly arranged at the bottom of the light source seat 6;
The heat dissipation seat 3 includes fixed frame 31, and fixed frame 31's centre is equipped with screw thread groove 32, and light source seat 6 threaded connection is in the inboard of screw thread groove 32, and fixed frame 31's screw thread groove 32 is equipped with heat dissipation coil pipe 33 in the bottom, and one side of heat dissipation coil pipe 33 is equipped with circulating pump 34, and the top of heat dissipation coil pipe 33 is laminated with the bottom of fin 8 and is connected.
Referring to fig. 1-2, a first rubber ring 7 is fixedly installed at the bottom of the light source seat 6, and the bottom of the first rubber ring 7 is attached to the top of the fixed frame 31; through setting up first rubber ring 7, can be during the use, the top of fixed frame 31 is assisted laminating through first rubber ring 7, and then has reached better sealed effect.
Referring to fig. 1-2 and 6, a hexagonal cover 35 is fixedly installed at the bottom of the fixed frame 31, the hexagonal cover 35 is fixedly installed at the top of the base plate 1, radiating windows 36 are equidistantly arranged at the outer sides of the hexagonal cover 35, and radiating fans 37 are arranged at the inner sides of the radiating windows 36; through setting up hexagonal cover 35, the radiator fan 37 operation in the radiator window 36 on the accessible hexagonal cover 35, and then alright reach better radiating effect for this light source whole heat dissipation ability is stronger.
Referring to fig. 1-2 and 6, the bottom of the fixed frame 31 is provided with heat dissipation holes 38 at equal intervals, and the bottoms of the heat dissipation holes 38 penetrate through the fixed frame 31; through the heat radiation holes 38, the ventilation efficiency of the inner sides of the hexagonal cover 35 and the fixed frame 31 can be increased in an auxiliary manner, and the heat radiation effect is further improved.
Referring to fig. 1-3 and 7, the protection mechanism 2 includes a top frame 21, buffer springs 22 are fixedly mounted at equal intervals on the outer side of the top frame 21, dampers 23 are arranged on the inner sides of the buffer springs 22, and a protection cover 24 is fixedly mounted on the top of the buffer springs 22; by arranging the protective cover 24, better protection capability can be achieved through the protective cover 24 during use, and a buffer spring 22 and a damper 23 are arranged to be matched, so that better shock absorption, buffer and protection functions can be achieved;
Referring to fig. 1 to 8, an inner lens cover 25 is fixedly mounted on the top of the top frame 21 inside the buffer spring 22, mounting mechanisms 5 are provided on both sides of the top frame 21, and the top frame 21 is mounted on the top of the fixed frame 31 through the mounting mechanisms 5; the inner lens cover 25 can play a good sealing role, and can achieve a good condensing role by matching with the condensing cover 9, so that the light source is convenient to use.
Referring to fig. 1-2 and 7, the mounting mechanism 5 includes a clamping groove 51 and a concave frame 52, the concave frame 52 is fixedly mounted on two sides of the top frame 21, the clamping groove 51 is opened on two sides of the fixed frame 31, the concave frame 52 is sleeved on the upper end of the fixed frame 31, a limit spring 53 is fixedly mounted on the inner side of the concave frame 52, a clamping block 54 is fixedly mounted on the inner end of the limit spring 53, the inner side of the clamping block 54 penetrates through the top frame 21 to be inserted into the inner side of the clamping groove 51, a connecting shaft 55 is fixedly mounted on the outer side of the clamping block 54, and a pull handle 56 is fixedly mounted on the outer end of the connecting shaft 55 penetrating through the concave frame 52; through setting up installation mechanism 5 for this light source is when the maintenance is needed during the use, and accessible spacing spring 53 contradicts fixture block 54 and peg graft to draw-in groove 51 inboard, and then is convenient for install protection machanism 2, when the maintenance is needed, only need draw the pull handle 56 to drive even axle 55 draw-out fixture block 54 outside and remove and leave draw-in groove 51, and then alright demolish top frame 21 from the top of fixed frame 31 fast, make this device easy dismounting, facilitate the use.
Referring to fig. 2,4 and 7, the bottom of the top frame 21 is fixedly provided with a second rubber ring 26, and the outer side of the top of the fixed frame 31 is provided with a sealing arc groove 27; through setting up second rubber ring 26, can be during the use, after protection machanism 2 installation is accomplished, the second rubber ring 26 of top frame 21 bottom with laminate to sealed arc groove 27 inboard, alright carry out further sealedly the outside of first rubber ring 7 this moment, further improved the sealing performance of this light source.
The invention provides a manufacturing process of an LED light source packaging structure with high light efficiency and high heat conduction, which comprises the following steps:
Step one: preparing a substrate of a light source seat 6, wherein the outside of the light source seat 6 is a polyphenylene sulfide heat-resistant plastic shell, the inside of the light source seat 6 is an aluminum substrate, a gold deposition process and a nickel plating process are adopted for an LED functional area in the manufacturing process of the aluminum substrate, the reliability of bonding wires of the functional area is ensured, at the moment, a layer of copper is coated on the aluminum substrate, then a PCB is mounted on the top of the aluminum substrate, and at the moment, a circuit pattern of an LED chip is manufactured through a photoetching technology;
Step two: all electronic components are welded and fixed according to the character positions of the printing elements corresponding to the PCB on the aluminum substrate, and after the welding and fixing are finished, the lamp beads of the light source core 4 are mounted on the PCB on the top of the aluminum substrate;
Step three: welding an LED chip on a circuit pattern on an aluminum substrate, coating a heat conducting layer such as a graphene heat conducting film on the LED chip, and performing injection molding on all parts of the residual mounting mechanism 5 and the protection mechanism 2 by adopting a die;
step four: the inner lens cover 25 is arranged above the light source core 4, so that the inner lens cover 25 is ensured not to be in contact with the LED chip, the inner lens cover 25 is an optical lens, the components of the mounting mechanism 5 and the protection mechanism 2 are cooled, and then the components are accommodated and kept for assembly;
Step five: coating a layer of packaging adhesive between the inner lens cover 25 and the heat conducting layer, then placing the whole structure into curing equipment for curing, using a die bonder to bond the light source cores 4 arranged in a row, baking after die bonding is finished to enable the LED wafer to be completely combined with the crystal track surface of the PCB, and adopting a gold wire ball welding process to weld the completely fixed chips, wherein the baking temperature is 160 ℃ and the baking time is 1.5H;
step six: testing the PCB on the aluminum substrate by using a PLC tester;
Step seven: dispensing holes of the mask by using a high-precision dispensing machine and high-performance photoelectric silica gel so as to achieve LED chip packaging;
Step eight: curing at normal temperature according to the curing characteristic of the adhesive to form a stable lens, sealing and packaging the LED functional area, and curing at normal temperature;
Step nine: retesting the cured LED light source;
step ten: and performing appearance inspection cleaning on the LED display panel after the test grading.
The working principle of the invention is as follows: during use, the light source is installed to a position required to be used through the installation hole on the bottom plate 1, at the moment, the light source seat 6 is connected to the inner side of the thread groove 32 in a threaded manner, at the moment, the top frame 21 is sleeved on the top of the fixed frame 31, at the moment, the limit spring 53 is abutted against the clamping block 54 to be inserted into the inner side of the clamping groove 51, further, the top frame 21 can be assisted to be installed to the top of the fixed frame 31, the installation can be completed, during the use after the installation is completed, when the protective cover 24 at the top of the top frame 21 is impacted, the protective cover 24 is matched with the damper 23 through the buffer spring 22, the auxiliary buffering can be carried out, further, a better buffering protection effect is achieved, the second rubber ring 26 and the sealing arc groove 27 are arranged, the second rubber ring 26 is attached in the sealing arc groove 27 during the use, so that a better sealing effect can be achieved, and the light source has a better buffering protection function, meanwhile, in the use process, the heat conduction is carried out on the light source seat 6 through the heat radiating fins 8 in an auxiliary way, so that the heat caused by the light source core 4 during light emission can be rapidly led out, the heat radiating fins 8 are further conducted and radiated through the heat radiating coil 33 in the process, the circulating pump 34 is operated at the moment, the cooling liquid in the heat radiating coil 33 can be driven to circularly flow, the heat radiating fan 37 is started to operate at the moment, the air enters through the heat radiating window 36 and is discharged through the heat radiating holes 38, the better heat radiating effect is achieved, the heat on the heat radiating coil 33, the heat radiating fins 8 and the light source seat 6 can be rapidly led out, the relatively high heat radiating capability is achieved, when the overhaul is required to be disassembled, the connecting shaft 55 is driven to draw the clamping block 54 to move outwards through the pulling handle 56, the clamping block 54 is separated from the inner side of the clamping groove 51 at the moment, the top frame 21 is conveniently taken out from the top of the fixed frame 31, at this time, the light source seat 6 is connected to the screw groove 32 by adopting screw threads, so that the light source seat 6 can be reversely rotated to be dismantled from the screw groove 32, and the light source is convenient to use, and in the use process, the inner lens cover 25 and the light condensing cover 9 are arranged, so that a good light condensing effect can be achieved, and the high-efficiency light transmittance of the light source can be maintained.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.