LED light source packaging structure

Abstract

The invention discloses an LED light source packaging structure, which relates to the technical field of LED light sources and comprises a three-axis adhesive dispensing equipment main body, an xy-axis moving part, a moving adhesive sealing unit and a fixed plate, the material pushing plates are arranged at the bottom of the fixing plate at equal angles and used for spreading out extruded glue towards the outer side, the auxiliary driving assembly is arranged at the bottom of the fixing plate and used for controlling the material pushing plates to rotate to be opened or closed, and the cutting assembly is arranged at the center of the material pushing plates and used for cutting off glue threads pulled out of the glue outlet end of the glue dispensing barrel. A material pushing plate is arranged, and the rotating material pushing plate can be spread from the middle of the glue to the periphery, so that the filling of the glue in the LED bracket is accelerated, the filling effect during glue filling and packaging is improved, and the phenomenon of non-uniform filling in the subsequent flattening process is avoided; the cutting-off mode is matched with the glue dispensing barrel which moves upwards for a small distance and then horizontally moves to the next glue dispensing position, so that the phenomenon that the flash of the glue is possibly flattened at the top of the LED bracket during flattening can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of LED light sources, and particularly to an LED light source packaging structure. Background Art

[0002] An LED light source, namely a light-emitting diode, is a semiconductor device that directly converts electrical energy into light energy. It has many advantages that cannot be compared with traditional light sources, such as energy conservation, long lifespan, shock resistance, fast response speed, and cold light source. LED light source packaging is an important link in the LED production process. Through precise process and material selection, it not only protects the LED chip but also improves its light efficiency, heat dissipation performance, and service life.

[0003] The production and processing process of an LED light source includes chip preparation, die bonding, wire bonding, potting encapsulation, cutting and separation, and testing. First, the LED chip needs to be fixed on a bracket, and then gold wires or aluminum wires are used to connect the electrodes of the LED chip to the pins on the bracket. Then, materials such as epoxy resin or silica gel are used to encapsulate the LED chip and the wire bonding. The encapsulation material not only protects the chip from the external environment but also can optimize the light output effect by adjusting the refractive index of the material. Finally, multiple encapsulated LEDs are cut and separated from the substrate into individual independent LED devices. Immediately afterwards, electrical, optical, and thermal tests need to be performed on the encapsulated LEDs to complete the production and processing of the LEDs. Before cutting and separation, the LED devices are arranged in a regular pattern.

[0004] During potting encapsulation, a packaging structure on a dispensing machine is used for potting. The motion control system is used to control the movement of the dispensing needle head in the X-axis, Y-axis, and Z-axis directions, and then the pressure control system is used to control the needle head for dispensing. The dispensing path can be set according to the position arrangement of the LED chips for dispensing, so as to realize the potting encapsulation of the LED chips. After sealing the glue, a flattening component such as a pressing roller is usually used to flatten the sealed glue inside each LED bracket, so that the glue tightly fills the bracket and covers the LED chip.

[0005] When the existing LEDs are filled and sealed with glue, it is usually necessary to dispense one by one. There will be flash at the dispensing position when the dispensing head moves in the dispensing direction, that is, the part of the glue at the dispensing head that is not disconnected from the extruded glue drop. When flattening, the flash of the glue may be flattened on the top of the LED bracket, thus affecting the LED packaging quality.

[0006] In view of the above problems, there is an urgent need to innovate and design on the basis of the original LED light source packaging structure. Summary of the Invention

[0007] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the prior art. Specifically, the purpose of the present invention is to provide an LED light source packaging structure to solve the problem that the flash generated during potting encapsulation affects the subsequent flattening process as proposed in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solution: An LED light source packaging structure, including a three-axis dispensing equipment main body, an xy-axis moving part, a moving potting unit, and a fixing plate, characterized in that: it further includes a pushing plate arranged at equal angles at the bottom of the fixing plate for spreading the extruded colloid outward, an auxiliary driving component arranged at the bottom of the fixing plate for controlling the rotation and opening or closing of the pushing plate, and a cutting component arranged at the center of the pushing plate for cutting the glue wire pulled out from the dispensing end of the glue cylinder; The cutting component includes an annular support cover arranged outside the dispensing end of the glue cylinder. A connecting rod is fixedly connected between the outer wall of the annular support cover and the fixed rod. An inner cylinder is arranged inside the annular support cover outside the dispensing end of the glue cylinder. A bottom ring is arranged at the bottom of the inner cylinder. The outer walls of the lower end of the inner cylinder and the bottom ring are both wound with a second traction rope; The outer wall of the pushing plate is set as an arc surface structure, and the side walls of the pushing plates at equal angles are in contact with each other.

[0009] Preferably, the moving potting unit includes a moving module arranged on the xy-axis moving part. A z-axis moving part for moving in the z-axis direction during potting is arranged on the moving module. A glue cylinder is installed on the z-axis moving part. The fixing plate is fixed at the lower end of the moving module, and a through hole located outside the glue cylinder is opened on the fixing plate.

[0010] Preferably, the auxiliary driving component includes fixed rods fixed at equal angles at the bottom of the fixing plate corresponding to the pushing plate. The end of the fixed rod is rotationally connected to the pushing plate through a scroll spring. A first traction rope is connected between the lower end of the glue cylinder and the outer wall of the corresponding pushing plate.

[0011] Preferably, a through groove is opened on the fixed rod, and wire rollers are arranged inside the through groove and on the outer wall of the fixed rod facing the outside. The first traction rope passes through the through groove and bypasses the wire rollers.

[0012] Preferably, metal wires are arranged on the inner wall of the lower end of the inner cylinder and the inner wall of the bottom ring, and the metal wires are set in a cross-shaped structure.

[0013] Preferably, a first limiting ring is fixed on the outer wall of the inner cylinder inside the annular support cover. The first limiting ring is used for longitudinally limiting the inner cylinder. The inner wall of the annular support cover and the outer wall of the inner cylinder are rotationally connected through a scroll spring.

[0014] Preferably, a clamping ring with an L-shaped cross-section is provided at the top of the bottom ring, and a second limiting ring located below the clamping ring is fixed to the inner wall of the lower end of the inner cylinder. A rotational connection is formed between the inner wall of the inner cylinder and the outer wall of the clamping ring through a scroll spring.

[0015] Preferably, one end of each of the two second traction ropes is fixed to the inner side wall of one of the pushing plates, and the other ends of the two second traction ropes are respectively fixed to the outer walls of the inner cylinder and the bottom ring, and the winding directions of the two second traction ropes are opposite.

[0016] Preferably, a wire guiding ring sleeving the outer sides of one ends of the two second traction ropes is fixed to the bottom of the connecting rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In the present invention, a pushing plate that can be rotated and reset at equal angles is provided. During the upward movement of the dispensing cylinder, the bottom of the dispensing cylinder will respectively pull the first traction rope, and the other end of the traction rope will pull the pushing plate to rotate. The pushing plate will pull the scroll spring to undergo rotational deformation. The rotation angle of the pushing plate can be controlled by controlling the upward movement distance of the dispensing cylinder, so that the rotation angle of the pushing plate is close to 90°. Since the dripping colloid has poor fluidity and forms a hemispherical shape when dropped on the LED bracket, the arc surface of the synchronously rotating pushing plate will spread from the middle of the colloid to the surroundings, accelerating the filling of the colloid in the LED bracket, improving the filling effect during potting encapsulation, and avoiding the phenomenon of uneven filling during the subsequent flattening process. (2) In the present invention, a cutting assembly is provided. When one of the pushing plates rotates, it will simultaneously pull the two second traction ropes. Since the winding directions of the two second traction ropes are opposite, the rotation directions of the inner cylinder and the bottom ring are also opposite. Since the rotation trajectory of the pushing plate is circular, the wire guiding ring can keep the pulling ends of the second traction ropes always in a horizontal state. The metal wires located on the inner walls of the inner cylinder and the bottom ring rotate synchronously, and when the cross-shaped metal wires rotate in the opposite direction, the vertical glue filaments pulled by the dispensing end during the upward movement of the dispensing cylinder can be cut. By cooperating this cutting method with the upward movement of the dispensing cylinder by a small distance and then horizontally moving to the next dispensing position, it is possible to avoid flattening the flying edge of the colloid on the top of the LED bracket during flattening, which affects the LED encapsulation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention; Figure 2 is a plan view of the present invention; Figure 3 is a perspective view of the mobile potting unit of the present invention; Figure 4 is a partial perspective view of the mobile potting unit of the present invention; Figure 5 Is a partial perspective view of the present invention when there is a single pushing plate; Figure 6 Is a sectional plan view of the fixing rod of the present invention; Figure 7 Is a perspective view of the pushing plate of the present invention; Figure 8 Is a perspective view of the annular support cover, inner cylinder and bottom ring of the present invention; Figure 9 Is a sectional perspective view of the support cover, inner cylinder and bottom ring of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of part A in.

[0019] In the figure: 1. Main body of the three-axis dispensing equipment; 2. XY-axis moving part; 3. Moving module; 4. Z-axis moving part; 5. Dispensing cylinder; 6. Fixed plate; 7. Fixed rod; 8. Pushing plate; 9. First traction rope; 10. Annular support cover; 11. Inner cylinder; 12. Bottom ring; 13. Second traction rope; 14. Connecting rod; 15. Conductive ring; 16. Metal wire. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 10 , the present invention provides a technical solution: an LED light source encapsulation structure, including a main body 1 of a three-axis dispensing device, an XY-axis moving part 2, a moving encapsulation unit and a fixed plate 6, and further including a pushing plate 8 arranged at the bottom of the fixed plate 6 at equal angles for spreading the extruded colloid outward, an auxiliary driving component arranged at the bottom of the fixed plate 6 for controlling the rotation and opening or closing of the pushing plate 8, and a cutting component arranged at the center of the pushing plate 8 for cutting the glue wire pulled out from the glue outlet end of the dispensing cylinder 5; The cutting component includes an annular support cover 10 arranged outside the glue outlet end of the dispensing cylinder 5. A connecting rod 14 is fixedly connected between the outer wall of the annular support cover 10 and the fixed rod 7. An inner cylinder 11 is arranged inside the annular support cover 10 outside the glue outlet end of the dispensing cylinder 5. A bottom ring 12 is arranged at the bottom of the inner cylinder 11. Second traction ropes 13 are wound around the outer wall of the lower end of the inner cylinder 11 and the outer wall of the bottom ring 12; The outer wall of the pushing plate 8 is set as an arc surface structure, and the side walls of the pushing plates 8 at equal angles are in contact with each other.

[0022] It should be noted that the main body 1 of the three-axis dispensing device is a dispensing device used in the prior art. The mobile sealing unit moves in the x-axis direction and the y-axis direction on the xy-axis moving part 2. When performing the next LED dispensing after dispensing, the equally-angled distributed pushing plates 8 can be rotated and opened by the auxiliary driving component. The arc surface of the pushing plate 8 can push the glue drops on the LED from the middle to the surroundings, which is beneficial to accelerating the filling efficiency of the glue in the LED and improving the filling effect. At the same time, the cutting component can cut off the flash generated during dispensing to avoid affecting the subsequent flattening of the glue body.

[0023] The annular support cover 10 and the dispensing cylinder 5 are located on the same central axis. The annular support cover 10 is fixed and limited through the connecting rod 14. The inner cylinder 11 can rotate within the annular support cover 10, and the bottom ring 12 can rotate at the bottom of the inner cylinder 11. The two groups of second traction ropes 13 can drive the inner cylinder 11 and the bottom ring 12 to rotate respectively.

[0024] The mobile sealing unit includes a mobile module 3 arranged on the xy-axis moving part 2. A z-axis moving part 4 for moving in the z-axis direction during sealing is arranged on the mobile module 3. A dispensing cylinder 5 is installed on the z-axis moving part 4. The fixing plate 6 is fixed at the lower end of the mobile module 3, and a through hole located outside the dispensing cylinder 5 is opened on the fixing plate 6.

[0025] It should be noted that the mobile module 3 moves in the x-axis direction and the y-axis direction on the xy-axis moving part 2, and moves in the z-axis direction through the z-axis moving part 4. The dispensing is performed by moving the outlet end of the installed dispensing cylinder 5 for LED light source encapsulation. The fixing plate 6 is fixed on the mobile module 3, and the dispensing cylinder 5 moves in the through hole in the z-axis direction following the z-axis moving part 4.

[0026] The auxiliary driving component includes fixing rods 7 fixed at equal angles at the bottom of the fixing plate 6 corresponding to the pushing plates 8. A rotational connection is formed between the end of the fixing rod 7 and the pushing plate 8 through a scroll spring. A first traction rope 9 is connected between the lower end of the dispensing cylinder 5 and the outer wall of the corresponding pushing plate 8.

[0027] It should be noted that one end of the first traction rope 9 is pulled according to the upward movement of the dispensing cylinder 5, and the other end of the first traction rope 9 pulls the pushing plate 8 to rotate at its end, causing the scroll spring to generate a rotational deformation. After the pulling force of the first traction rope 9 is released, the deformation of the scroll spring resets to drive the pushing plate 8 to rotate and reset.

[0028] A through groove is opened on the fixing rod 7, and wire rollers are arranged inside the through groove and on the outer wall of the fixing rod 7 facing the outside. The first traction rope 9 passes through the through groove and bypasses the wire rollers.

[0029] It should be noted that after the first traction rope 9 passes through the through groove, it adheres to the outer wall of the wire roller, so that the friction is reduced when the first traction rope 9 pulls, which is beneficial to pulling the pushing plate 8 to rotate.

[0030] Metal wires 16 are provided on the inner wall of the lower end of the inner cylinder 11 and the inner wall of the bottom ring 12, and the metal wires 16 are arranged in a cross-shaped structure.

[0031] It should be noted that since the metal wires 16 are relatively thin, the cross-shaped metal wires 16 will not affect the colloid from passing through and dripping onto the LED for dispensing.

[0032] A first limiting ring is fixed on the outer wall of the inner cylinder 11 and is located inside the annular support cover 10. The first limiting ring is used to longitudinally limit the inner cylinder 11, and a rotational connection is formed between the inner wall of the annular support cover 10 and the outer wall of the inner cylinder 11 through a scroll spring.

[0033] It should be noted that the first limiting ring is stuck inside the annular support cover 10 to limit the inner cylinder 11, so that the inner cylinder 11 can only rotate. When rotating, the scroll spring can be pulled to generate a rotational deformation, and the inner cylinder 11 can be rotationally reset through the scroll spring.

[0034] A clamping ring with an L-shaped cross-section is provided at the top of the bottom ring 12, and a second limiting ring is fixed on the inner wall of the lower end of the inner cylinder 11 and is located below the clamping ring. A rotational connection is formed between the inner wall of the inner cylinder 11 and the outer wall of the clamping ring through a scroll spring.

[0035] It should be noted that the fixed second limiting ring is stuck below the L-shaped clamping ring to limit the bottom ring 12, so that the bottom ring 12 can only rotate. When rotating, the scroll spring can be pulled to generate a rotational deformation, and the bottom ring 12 can be rotationally reset through the scroll spring.

[0036] One ends of two groups of second traction ropes 13 are both fixed on the inner side wall of one group of pushing plates 8, and the other ends of the two groups of second traction ropes 13 are respectively fixed on the outer walls of the inner cylinder 11 and the bottom ring 12, and the winding directions of the two groups of second traction ropes 13 are opposite.

[0037] It should be noted that when one group of pushing plates 8 rotates, the second traction ropes 13 can be pulled simultaneously. Since the winding directions of the two groups of second traction ropes 13 are opposite, the inner cylinder 11 and the bottom ring 12 can be rotated simultaneously, but the rotation directions are opposite.

[0038] A wire guide ring 15 sleeving on the outer sides of one ends of the two groups of second traction ropes 13 is fixed at the bottom of the connecting rod 14.

[0039] It should be noted that the wire guide ring 15 is a double-ring fixed structure. Since the rotation trajectory of the pushing plate 8 is circular, the wire guide ring 15 can keep the pulling ends of the second traction ropes 13 always in a horizontal state.

[0040] Working principle: First, when encapsulating the LED light source with glue, it is necessary to first fix the uncut LED bracket at the glue dispensing position of the main body 1 of the three-axis glue dispensing device, which is located below the glue dispensing cylinder 5. The position of the moving module 3 can be adjusted through the xy-axis moving part, so that the glue outlet end of the glue dispensing cylinder 5 is located above the center of the first LED bracket at the starting end. And the z-axis moving part is used to control the glue dispensing cylinder 5 to move downward so that its glue outlet end approaches the LED bracket. As Figure 3 shown in the figure, this is the state at this time, and the glue dispensing and encapsulation is ready to start. The moving path can be set according to the position arrangement and spacing of the LED brackets.

[0041] Then, the pressure control system of the main body 1 of the three-axis glue dispensing device is used to control the glue dispensing cylinder 5 to dispense glue, and the amount of glue dispensed each time is the same. The glue then passes through the wire 16 on the inner wall of the inner cylinder 11 and the bottom ring 12 and drips into the LED bracket. After the glue is dispensed, the z-axis moving part controls the glue dispensing cylinder 5 to move upward, and the module 3 can be adjusted downward to the next LED bracket to perform the same operation through the xy-axis moving part. And so on, the LED light source encapsulation process is completed according to the set path.

[0042] Finally, during the upward movement of the glue dispensing cylinder 5, the bottom of the glue dispensing cylinder 5 will respectively pull the first traction rope 9, and the other end of the traction rope 9 will pull the pushing plate 8 to rotate. After the first traction rope 9 passes through the through groove, it is attached to the outer wall of the wire roller, so that the pulling of the first traction rope 9 reduces the friction, which is beneficial to pulling the pushing plate 8 to rotate. The pushing plate 8 pulls the scroll spring to rotate and deform. The rotation angle of the pushing plate 8 can be controlled by controlling the upward movement distance of the glue dispensing cylinder 5, so that the rotation angle of the pushing plate 8 is close to 90°. Since the dripping glue has poor fluidity and forms a hemispherical shape when dripping on the LED bracket, the arc surface of the synchronously rotating pushing plate 8 will spread from the middle of the glue to the surrounding, accelerating the filling of the glue in the LED bracket and improving the filling effect during the glue encapsulation.

[0043] One set of pusher plates 8 will simultaneously pull two sets of second traction ropes 13 while rotating. Since the second traction ropes 13 are respectively wound around the outer walls of the inner cylinder 11 and the bottom ring 12, and the other ends of the second traction ropes 13 are respectively fixed to the outer walls of the inner cylinder 11 and the bottom ring 12, the second traction ropes 13 will drive the inner cylinder 11 and the bottom ring 12 to rotate respectively when pulled. Since the winding directions of the two sets of second traction ropes 13 are opposite, the rotation directions of the inner cylinder 11 and the bottom ring 12 are also opposite. Since the rotation trajectory of the pusher plate 8 is circular, and the wire guide ring 15 can keep the pulling ends of the second traction ropes 13 always in a horizontal state, the inner cylinder 11 rotates to pull the scroll spring to generate a rotational deformation, and the bottom ring 12 rotates to pull the scroll spring to generate a rotational deformation when rotating. The wires 16 located on the inner walls of the inner cylinder 11 and the bottom ring 12 rotate synchronously, and the cross-shaped wires 16 can cut off the vertically upward glue filaments pulled by the glue outlet end when the dispensing cylinder 5 moves up. By using this cutting method in cooperation with the dispensing cylinder 5 moving up a small distance and then horizontally moving to the next dispensing position, it is possible to avoid flattening the flying edge of the colloid on the top of the LED bracket during flattening, thereby affecting the LED packaging quality. When moving to the next dispensing position, the dispensing cylinder 5 moves down in the same way, and the pusher plate 8, the inner cylinder 11 and the bottom ring 12 all rotate and reset under the action of the scroll spring.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An LED light source packaging structure, comprising a three-axis dispensing device body (1), an xy-axis moving part (2), a movable sealing unit and a fixed plate (6), characterized in that: It also includes a push plate (8) arranged at an equal angle at the bottom of the fixed plate (6) for spreading the extruded colloid outward, an auxiliary drive component arranged at the bottom of the fixed plate (6) for controlling the push plate (8) to rotate open or close, and a cutting component arranged at the center of the push plate (8) for cutting the rubber wire pulled out from the dispensing cylinder (5); The cutting assembly comprises an annular support cover (10) arranged outside the glue outlet end of the glue dispensing cylinder (5), a connecting rod (14) is fixedly connected between the outer wall of the annular support cover (10) and the fixed rod (7), an inner cylinder (11) is arranged inside the annular support cover (10) and outside the glue outlet end of the glue dispensing cylinder (5), a bottom ring (12) is arranged at the bottom of the inner cylinder (11), and a second traction rope (13) is wound around the outer wall of the lower end of the inner cylinder (11) and the outer wall of the bottom ring (12); The outer wall of the push plate (8) is configured as a curved surface structure, and the side walls of the push plate (8) at equal angles fit together.

2. The LED light source packaging structure according to claim 1, characterized in that: The mobile glue sealing unit comprises a mobile module (3) arranged on an xy-axis mobile part (2), the mobile module (3) being provided with a z-axis mobile part (4) for moving in the z-axis direction during glue sealing, a glue dispensing cylinder (5) being installed on the z-axis mobile part (4), the fixed plate (6) being fixed at the lower end of the mobile module (3), and a through hole located outside the glue dispensing cylinder (5) being opened on the fixed plate (6).

3. The LED light source packaging structure according to claim 1, characterized in that: The auxiliary drive assembly comprises a fixed rod (7) fixed at an equal angle to the bottom of the fixed plate (6) and corresponding to the push plate (8); the end of the fixed rod (7) and the push plate (8) are rotationally connected via a vortex spring; and a first traction rope (9) is connected between the lower end of the dispensing cylinder (5) and the outer wall of the corresponding push plate (8).

4. The LED light source packaging structure according to claim 3, characterized in that: The fixing rod (7) is provided with a through slot, and a conductor roller is provided inside the through slot and on the outer wall of the fixing rod (7) facing outwards, and the first traction rope (9) passes through the through slot and bypasses the conductor roller.

5. The LED light source packaging structure according to claim 1, characterized in that: The inner wall of the lower end of the inner cylinder (11) and the inner wall of the bottom ring (12) are both provided with metal wires (16), and the metal wires (16) are arranged in a cross-shaped structure.

6. The LED light source packaging structure according to claim 1, characterized in that: A first limiting ring located inside the annular support cover (10) is fixed to the outer wall of the inner cylinder (11), the first limiting ring being used to limit the longitudinal position of the inner cylinder (11), and a vortex spring is used to form a rotational connection between the inner wall of the annular support cover (10) and the outer wall of the inner cylinder (11).

7. The LED light source packaging structure according to claim 1, characterized in that: A clamping ring with an L-shaped cross-section is provided on the top of the bottom ring (12), and a second limiting ring located below the clamping ring is fixed to the inner wall of the lower end of the inner cylinder (11), and a vortex spring is used to form a rotational connection between the inner wall of the inner cylinder (11) and the outer wall of the clamping ring.

8. The LED light source packaging structure according to claim 1, characterized in that: One end of the two sets of the second traction ropes (13) are fixed to the inner side wall of one set of the pusher plates (8), and the other ends of the two sets of the second traction ropes (13) are respectively fixed to the outer walls of the inner cylinder (11) and the bottom ring (12), and the winding directions of the two sets of the second traction ropes (13) are opposite.

9. The LED light source packaging structure according to claim 1, characterized in that: A wire ring (15) is fixed at the bottom of the connecting rod (14) and is sleeved on the outside of one end of the two sets of second traction ropes (13).

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