Integrated LED lamp bead

Abstract

The invention relates to the technical field of LED lamp beads, and discloses an integrated LED lamp bead which comprises a plurality of lamp bead bodies, PINs are arranged at the bottoms of the lamp bead bodies, the PINs are welded to corresponding bonding pads in a PCB, functional areas are arranged at the tops of the lamp bead bodies and used for bearing RGB chips, an unfilled corner is formed in one corner of the top of each lamp bead body, and the unfilled corners are welded to the corresponding bonding pads in the PCB. The unfilled corners are marks used for direction positioning during welding, every two adjacent lamp bead bodies are fixedly connected through a connecting body, and the multiple lamp bead bodies are connected through the multiple connecting bodies to form a whole. Through the arrangement of the connector, the plurality of lamp bead main bodies are fixedly connected to form a stable assembly, the pin of the assembly is the sum of the pins of the plurality of lamp bead main bodies, and after the assembly is welded, the contact area between the bottom of the assembly and a PCB (Printed Circuit Board) is greatly increased, so that the thrust between the assembly and a bonding pad is greatly improved; and the phenomenon of lamp falling caused by insufficient thrust is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of LED lamp beads, in particular to an integrated LED lamp bead. Background Art

[0002] In the field of modern lighting and display technology, LED lamp beads are widely used in various electronic products, lighting equipment, and display screens due to their significant advantages such as energy saving, environmental protection, and long life. With the vigorous development of related industries, the requirements for the performance and application flexibility of LED lamp beads are becoming increasingly stringent.

[0003] Traditional single LED lamp beads have many limitations in actual use. On the one hand, the number of pins is limited, such as 4 pins, which makes the contact area between the bottom of the lamp bead and the PCB board small. During the mounting of LED lamp beads on the PCB board and the subsequent transportation process, due to external forces such as vibration and collision, the thrust between the lamp bead and the pad is insufficient, and the LED lamp bead is very likely to fall off, which seriously affects the production yield and use stability of the product, and increases the production and after-sales costs.

[0004] To solve these problems, existing technologies mainly focus on optimizing the pad design, such as increasing the pad reference value according to the LED specifications to ensure that the pad size and spacing meet the LED specifications to improve welding reliability. However, this method only starts from the pad perspective and does not effectively improve the structure of the lamp bead itself. The number of PIN pins of the lamp bead and the gap between the PIN pins remain unchanged, the contact surface between the PIN pins and the pad is limited, and the thrust enhancement effect is poor, which cannot fundamentally solve the problem of lamp falling. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an integrated LED lamp bead, which solves the problem that the LED lamp bead is easily dropped due to insufficient thrust between the prior art lamp bead and the soldering pad.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: an integrated LED lamp bead, including multiple lamp bead bodies, a PIN foot is arranged at the bottom of the lamp bead body, the PIN foot is welded to the corresponding pad in the PCB board, a functional area is arranged on the top of the lamp bead body, the functional area is used to carry the RGB three-color chip, a corner of the top of the lamp bead body is provided with a notch, the notch is a mark for direction positioning during welding, two adjacent lamp bead bodies are fixedly connected by a connector, and the multiple lamp bead bodies are connected by multiple connectors to form a whole.

[0007] Preferably, a heat sink is fixedly connected to the bottom wall of the connector, and two ends of the heat sink are respectively in contact with heat dissipation contacts of two adjacent lamp bead bodies.

[0008] Preferably, the connector and the lamp bead body are integrally formed, and a plurality of lamp bead bodies and a plurality of connectors are arranged in a straight line to form a long light strip.

[0009] Preferably, the connector and the lamp bead body are integrally formed, and a plurality of lamp bead bodies and a plurality of connectors are arranged in a ring to form a ring-shaped light strip.

[0010] Preferably, the connector and the lamp bead body are integrally formed, and a plurality of lamp bead bodies and a plurality of connectors are arranged in a rectangular array to form a rectangular light bar.

[0011] Preferably, the outer side wall of the lamp bead body is provided with a first clamping portion, the outer side wall of the connector is provided with a second clamping portion corresponding to the first clamping portion, and the first clamping portion and the second clamping portion are clamped and fixed to each other.

[0012] Preferably, the first engaging portion includes a slot, which is provided on the outer wall of the lamp bead body, and a groove 1 is provided in the slot. The second engaging portion includes a pin, and one side of the pin is fixedly connected to the outer wall of the connector. The pin is composed of two symmetrically arranged spring sheets, with a gap between the two spring sheets, and opposite sides of the spring sheets are fixedly connected with a hook 1. When the pin is inserted into the slot, the two spring sheets move closer to each other. When the pin is fully inserted into the slot, the two spring sheets are reset under the action of elasticity, and the hook 1 is inserted into the groove 1 at the same time.

[0013] Preferably, the first engaging portion includes a locking hole, and a second locking hook is provided on the inner wall of the locking hole. The second locking portion includes a pin, and a second groove is provided on the column body of the pin. When the pin is inserted into the locking hole, the second locking hook is squeezed and compressed into the inner wall of the locking hole. When the pin is fully inserted into the locking hole, the second locking hook is reset under the action of elasticity, and the second locking hook is locked into the second groove.

[0014] The present invention provides an integrated LED lamp bead, which has the following beneficial effects: The present invention forms a stable assembly by setting a connector to fix multiple lamp bead bodies. On the one hand, the lamp bead bodies in the assembly are mutually restrained, and the pins of the assembly are the sum of the pins of the multiple lamp bead bodies. After the assembly is welded, the contact area between the bottom of the assembly and the PCB board is greatly increased, thereby greatly improving the thrust between the assembly and the welding pad, and effectively improving the lamp falling phenomenon caused by insufficient thrust; on the other hand, the heat sink under the connector is in contact with the heat dissipation contacts of each lamp bead body, so that the heat sink quickly absorbs the heat generated by the lamp bead body lighting, which not only improves the heat dissipation effect, but also plays a role in heat equalization, thereby reducing the influence of high temperature on the lamp bead and increasing the service life of the lamp bead. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a three-dimensional diagram of the long strip shape of the integrated LED lamp bead in the first embodiment of the present invention; Figure 2 This is a front view of the long strip of integrated LED lamp beads in the first embodiment of the present invention; Figure 3 This is a three-dimensional diagram of the ring-shaped integrated LED lamp bead in the first embodiment of the present invention; Figure 4 This is a three-dimensional diagram of the rectangular shape of the integrated LED lamp bead in the first embodiment of the present invention; Figure 5 It is a three-dimensional diagram of a snap-fit ​​structure between the lamp bead body and the connector in the second embodiment of the present invention; Figure 6 It is a front view of a snap-fit ​​structure between the lamp bead body and the connector in the second embodiment of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 It is a three-dimensional diagram of another engaging structure between the lamp bead body and the connector in the second embodiment of the present invention; Fig. 9 It is a front view of another engaging structure between the lamp bead body and the connector in the second embodiment of the present invention; Fig.10 for Fig. 9 Enlarged view of point B in the middle.

[0016] Among them, 10, lamp bead body; 20, PIN foot; 30, functional area; 40, connector; 50, heat sink; 60, first clamping part; 601, clamping slot; 602, groove one; 603, clamping hole; 604, clamping hook two; 70, second clamping part; 701, clamping pin; 702, clamping hook one; 703, pin column; 704, groove two; 80, missing corner. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0018] Please see attached Figure 1 -Attached Figure 4The embodiment of the present invention provides an integrated LED lamp bead, including a plurality of lamp bead bodies 10, a PIN foot 20 is provided at the bottom of the lamp bead body 10, and the PIN foot 20 is welded to the corresponding pad in the PCB board to realize electrical connection, and a functional area 30 is provided at the top of the lamp bead body 10, and the functional area 30 is used to carry the RGB three-color chip, so that the lamp bead can emit light of different colors, and achieve a rich color display effect through mixing. A corner notch 80 is provided at one corner of the top of the lamp bead body 10, and the corner notch 80 is a mark for direction positioning during welding. The corner notch 80 can help production personnel quickly and accurately determine the installation direction of the lamp bead on the PCB board, avoid welding problems caused by wrong direction, and improve production efficiency and product quality. Two adjacent lamp bead bodies 10 are fixedly connected by a connector 40, and multiple lamp bead bodies 10 are connected by multiple connectors 40 to form a whole.

[0019] Taking the two-in-one overall structure composed of two lamp bead bodies 10 and a connector 40 as an example, after experimental verification, the original 4-pin of the single lamp bead body 10 is changed to 8-pin of the two-in-one overall structure, so that the contact area between the bottom and the PCB board is increased by more than 2 times, and the thrust is increased by nearly 3 times, which effectively improves the lamp falling phenomenon caused by insufficient thrust.

[0020] At the same time, based on the experiment of the above two-in-one overall structure, other different combination structures were also experimentally verified. Different numbers of lamp bead bodies 10 and connectors 40 were combined into different overall structures by welding equipment. The specific combination methods are as follows: Single lamp bead body 10 Three-in-one structure: three lamp bead bodies 10 are connected with two connectors 40; Four-in-one structure: four lamp bead bodies 10 are connected with three connectors 40; Five-in-one structure: five lamp bead bodies 10 are connected with four connectors 40.

[0021] Select LED lamp bead main body 10 of uniform specifications to ensure the consistency of parameters such as the number of pins and size; matching connector 40; standard PCB board; high-precision measuring instrument.

[0022] Specific experimental methods: For a single lamp bead body 10, use an electronic caliper to measure the length and width of the bottom part in contact with the PCB board. According to the rectangular area formula S = length × width, calculate the contact area, record it as S1, and solder it to the corresponding pad of the PCB board according to the standard welding process. After the welding is firm, use the thrust test equipment to place the test probe perpendicular to the connection plane between the lamp bead body 10 and the PCB board, and apply thrust at a constant speed (0.5mm / s) until the lamp bead separates from the PCB board. Record the thrust value at this time, record it as F1. Repeat this operation 10 times, and take the average value as the thrust between the single lamp bead body 10 and the PCB board.

[0023] A three-in-one structure lamp bead is manufactured, and three lamp bead main bodies 10 are connected through two connectors 40. After the structure is stable, the length and width of the contact part between the bottom of the assembly and the PCB board are measured, and the contact area is calculated and recorded as S3; at the same time, it is welded on the PCB board, and the same thrust test method as a single lamp bead is used to perform 10 thrust tests on the welded three-in-one structure lamp bead, and the thrust value of each test is recorded, and the average value is recorded as F3.

[0024] Similarly, a four-in-one structure lamp bead (four lamp bead bodies 10 connected to three connectors 40) and a five-in-one structure lamp bead (five lamp bead bodies 10 connected to four connectors 40) were manufactured, and the contact areas between their bottoms and the PCB board were measured and calculated, respectively, and recorded as S4 and S5; they were soldered on the PCB board, and the average values ​​of 10 thrust tests were recorded as F4 and F5.

[0025] The experimental results are shown in the following table: Lamp bead combination structure Contact area Area increase multiple Average thrust Thrust increase multiple Single lamp bead body 10 S1=10.0 1.0 F1=2.0 1.0 Three-in-one structure S3=32.0 2.2 F3=6.2 3.1 Four-in-one structure S4=43.0 3.3 F4=8.5 4.25 Five-in-one structure S5=55.0 4.5 F5=11.0 5.5 By setting the connector 40, multiple lamp bead bodies 10 are fixedly connected to form a stable assembly, so that the lamp bead bodies 10 in the assembly are mutually restrained, and the pins of the assembly are the sum of the pins of the multiple lamp bead bodies. When the assembly is welded, the contact area between the bottom of the assembly and the PCB board is greatly increased, thereby greatly improving the thrust between the assembly and the pad, effectively improving the lamp falling phenomenon caused by insufficient thrust.

[0026] A heat sink 50 is fixedly connected to the bottom wall of the connector 40 , and two ends of the heat sink 50 are respectively in contact with the heat dissipation contacts of two adjacent lamp bead bodies 10 .

[0027] By bringing the heat sink 50 under the connector into contact with the heat dissipation contacts of each lamp bead body 10, the heat sink 50 quickly absorbs the heat generated by the lamp bead body 10 during lighting, thereby improving the heat dissipation effect and achieving heat uniformity, thereby reducing the impact of high temperature on the lamp bead and increasing the service life of the lamp bead.

[0028] Of course, on the basis of the above two-in-one combination, in order to improve the applicability of the integrated LED lamp beads and meet the needs of different scenarios, on the basis of the above two-in-one combination, a variety of different combination forms have been developed, such as: The connector 40 and the lamp bead body 10 are integrally formed, and a plurality of lamp bead bodies 10 and a plurality of connectors 40 are arranged in a straight line to form a long light strip. This long light strip has unique advantages in some scenes requiring linear lighting, such as cabinet lighting, corridor lighting, etc. It can provide uniform and continuous light and create a comfortable visual environment.

[0029] The connector 40 and the lamp bead body 10 are integrally formed, and multiple lamp bead bodies 10 and multiple connectors 40 are arranged in a ring to form a ring light bar. Ring light bars are widely used in the field of decorative lighting, such as chandeliers in hotel lobbies, atmosphere lights for home decoration, etc. Its unique ring structure can produce a soft, surrounding light effect, adding a unique beauty and atmosphere to the space.

[0030] The connector 40 and the lamp bead body 10 are integrally formed, and a plurality of lamp bead bodies 10 and a plurality of connectors 40 are arranged in a rectangular array to form a rectangular light bar. The rectangular light bar performs well in the fields of large-area lighting and display screen backlight, and can provide high-intensity and uniform light to meet the requirements of brightness and light uniformity in different scenes. Example

[0031] Please see attached Figure 5 -Attached Fig.10 On the basis of the above-mentioned embodiment, the difference between this embodiment and the above-mentioned embodiment lies in that the connection form of the integrally formed lamp bead body 10 and the connector 40 is changed, and a modular design is used, that is, the lamp bead body 10 is a module, and the connector 40 is a module, and the two modules are combined by a snap-fitting and fixing method. This form allows the lamp bead body 10 to be freely combined according to actual needs, so that the combination of lamp beads is no longer strictly restricted by quantity, thereby further improving the applicability of the integrated LED lamp bead, and also greatly reducing its use cost, maintenance cost and production cost.

[0032] In this embodiment, the following two engagement methods are listed: A first engaging portion 60 is formed on the outer wall of the lamp bead body 10 , and a second engaging portion 70 corresponding to the first engaging portion 60 is formed on the outer wall of the connecting body 40 . The first engaging portion 60 and the second engaging portion 70 are engaged and fixed with each other.

[0033] The first engaging portion 60 includes a slot 601, which is provided on the outer wall of the lamp bead body 10, and a groove 602 is provided in the slot 601. The second engaging portion 70 includes a latch 701, and one side of the latch 701 is fixedly connected to the outer wall of the connector 40. The latch 701 is composed of two symmetrically arranged spring sheets, with a gap between the two spring sheets, and opposite sides of the spring sheets are fixedly connected with a hook 702. When the latch 701 is inserted into the slot 601, the two spring sheets move closer to each other. When the latch 701 is fully inserted into the slot 601, the two spring sheets are reset under the action of elasticity, and the hook 702 is inserted into the groove 602 at the same time.

[0034] The first engaging portion 60 includes an engaging hole 603, and a second engaging hook 604 is provided on the inner wall of the engaging hole 603. The second engaging portion 70 includes a pin 703, and a second groove 704 is provided on the column body of the pin 703. When the pin 703 is inserted into the engaging hole 603, the second engaging hook 604 is squeezed and compressed into the inner wall of the engaging hole 603. When the pin 703 is fully inserted into the engaging hole 603, the second engaging hook 604 is reset under the action of elasticity, and the second engaging hook 604 is engaged in the second groove 704.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated LED lamp bead, comprising a plurality of lamp bead bodies (10), characterized in that: A PIN foot (20) is provided at the bottom of the lamp bead body (10), and the PIN foot (20) is welded to a corresponding pad in a PCB board; a functional area (30) is provided at the top of the lamp bead body (10), and the functional area (30) is used to carry an RGB three-color chip; a notch (80) is provided at one corner of the top of the lamp bead body (10), and the notch (80) is a mark used for directional positioning during welding; two adjacent lamp bead bodies (10) are fixedly connected via a connector (40), and a plurality of lamp bead bodies (10) are connected via a plurality of connectors (40) to form a whole.

2. The integrated LED lamp bead according to claim 1, characterized in that: A heat sink (50) is fixedly connected to the bottom wall of the connector (40), and two ends of the heat sink (50) are respectively in contact with heat dissipation contacts of two adjacent lamp bead bodies (10).

3. The integrated LED lamp bead according to claim 2, characterized in that: The connecting body (40) and the lamp bead main body (10) adopt an integrally formed structure, and a plurality of lamp bead main bodies (10) and a plurality of connecting bodies (40) are arranged in a straight line to form a long light strip.

4. The integrated LED lamp bead according to claim 2, characterized in that The connecting body (40) and the lamp bead main body (10) adopt an integrally formed structure, and a plurality of lamp bead main bodies (10) and a plurality of connecting bodies (40) are arranged in a ring to form a ring-shaped light strip.

5. The integrated LED lamp bead according to claim 2, characterized in that The connector (40) and the lamp bead main body (10) adopt an integrally formed structure, and a plurality of lamp bead main bodies (10) and a plurality of connectors (40) are arranged in a rectangular array to form a rectangular light bar.

6. The integrated LED lamp bead according to claim 2, characterized in that: The outer wall of the lamp bead body (10) is provided with a first clamping portion (60), and the outer wall of the connecting body (40) is provided with a second clamping portion (70) corresponding to the first clamping portion (60), and the first clamping portion (60) and the second clamping portion (70) are mutually clamped and fixed.

7. The integrated LED lamp bead according to claim 6, characterized in that: The first engaging portion (60) comprises a slot (601), wherein the slot (601) is provided on the outer wall of the lamp bead body (10), and a groove 1 (602) is provided in the slot (601). The second engaging portion (70) comprises a latch (701), wherein one side of the latch (701) is fixedly connected to the outer wall of the connecting body (40), and the latch (701) is composed of two symmetrically arranged spring sheets, with a gap between the two spring sheets, and opposite sides of the spring sheets are fixedly connected with a hook 1 (702). When the latch (701) is inserted into the slot (601), the two spring sheets move closer to each other. When the latch (701) is fully inserted into the slot (601), the two spring sheets are reset under the action of elasticity, and at the same time, the hook 1 (702) is latched into the groove 1 (602).

8. The integrated LED lamp bead according to claim 6, characterized in that: The first engaging portion (60) comprises an engaging hole (603), the inner wall of which is provided with a second engaging hook (604); the second engaging portion (70) comprises a pin column (703), the column body of which is provided with a second groove (704); when the pin column (703) is inserted into the engaging hole (603), the second engaging hook (604) is squeezed and compressed into the inner wall of the engaging hole (603); when the pin column (703) is completely inserted into the engaging hole (603), the second engaging hook (604) is reset under the action of elasticity, and at the same time, the second engaging hook (604) is engaged in the second groove (704).

Images