Display RGB-LED lamp bead structure

Abstract

The utility model discloses a display RGB-LED lamp bead structure, and relates to the technical field of semiconductor devices, the lamp bead structure comprises an LED support on which an LED chip is arranged; the positive electrode of the LED chip is connected to the positive electrode pin through wire bonding; the negative electrode of the LED chip is connected to the negative electrode pin through wire bonding; wherein the LED support comprises a base and a fence extending from the edge of the base, the fence is enclosed on the base to form an accommodating space, the LED chip is arranged on the base in the accommodating space, one side, far away from the base, of the fence is covered with a light-transmitting part, and a connecting assembly is arranged on a junction surface between the light-transmitting part and the fence. The light-transmitting piece covers the fence through the connecting assembly so as to seal the containing space. According to the LED lamp bead structure, the fence of the LED support is connected with the light-transmitting piece through the connecting assembly, the sealing performance of the lamp bead structure can be enhanced, and the service life of the lamp bead structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor devices, and specifically to a display RGB-LED lamp bead structure. Background Art

[0002] With the widespread application of display technology and the diversification of application scenarios, the application of LED display devices, a key component of display screens, has become more important. Therefore, the reliability and performance requirements of LED lamp beads are getting higher and higher. From the perspective of LED lamp bead technology, the packaging technology and product structure have an important impact on their performance and reliability. The early process routes of LED lamp beads are generally die bonding, wire bonding, glue dispensing, blanking, spectrometry, taping, packaging and shipment. The main function of glue dispensing is to protect the chip and wire, and to prevent moisture infiltration. The glue dispensing mainly uses epoxy resin AB glue and diffusion powder mixed in a certain ratio. Due to the certain internal stress of epoxy resin, it has a certain pulling effect on the wire, which can easily break the wire and cause the lamp bead to die. In addition, due to the certain error in the glue ratio, the overall consistency of the lamp bead is easily poor.

[0003] Existing TOP LED devices use TOP stamping injection molding brackets as carriers, use silver glue or insulating glue to fix the chip in the functional area, and then weld the bonding wires between the chip electrodes and the functional area to form an electrical connection between the chip and the functional area. The bracket is sealed with glue through a dispensing process to protect the chip and wires inside the lamp bead from moisture, and then the material is blanked into regular lamp beads that can emit RGB three primary colors (attached). Figure 1 For outdoor structure lamp beads, attached Figure 2 For indoor structure lamp beads).

[0004] The existing lamp bead structure has internal stress in the epoxy resin during the dispensing process, which can easily break the bonding wire during later use, resulting in a short lamp life and poor lamp failure. In addition, due to the high temperature of the epoxy resin and aging of the lamp beads during later use, the sealing of the epoxy resin is easily weakened, which can easily lead to water vapor infiltration, resulting in lamp burnout and poor metal migration. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an RGB-LED lamp bead structure for display, aiming to enhance the sealing of the lamp bead structure and increase the service life of the lamp bead structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A display RGB-LED lamp bead structure, the lamp bead structure comprising:

[0008] An LED bracket having an LED chip disposed thereon;

[0009] A positive electrode pin, to which the positive electrode of the LED chip is connected via wire bonding;

[0010] A cathode pin, to which the cathode of the LED chip is connected via wire bonding;

[0011] In which, the LED bracket includes a base and an enclosure extending from the edge of the base, the enclosure is enclosed on the base to form an accommodating space, the LED chip is arranged on the base in the accommodating space, and a side cover of the enclosure away from the base is provided with a light-transmitting member, and a connecting component is provided on the joint surface between the light-transmitting member and the enclosure, and the light-transmitting member is covered on the enclosure through the connecting component to close the accommodating space.

[0012] According to one aspect of the above technical solution, the connecting assembly includes at least one first connecting portion provided on the enclosure, and at least one second connecting portion provided on the light-transmitting member, and the first connecting portion and the second connecting portion are engaged and connected.

[0013] According to one aspect of the above technical solution, the connection assembly further includes an adhesive layer, and the adhesive layer is provided between the first connection part and the second connection part.

[0014] According to one aspect of the above technical solution, either one of the first connecting portion and the second connecting portion is a groove, and the other is a protrusion corresponding to the groove.

[0015] According to one aspect of the above technical solution, the first connecting portion is a groove, the second connecting portion is a protrusion, and the adhesive layer fills the interior of the first connecting portion in the form of the groove.

[0016] According to one aspect of the above technical solution, two of the first connecting parts and two of the second connecting parts are provided.

[0017] According to one aspect of the above technical solution, one of the two first connecting parts is recessed inward from the surface of the enclosure to form a first groove, and the other is a first protrusion connected to the first groove. One of the two second connecting parts is a second protrusion corresponding to the first groove, and the other is a second groove corresponding to the first protrusion.

[0018] According to one aspect of the above technical solution, the adhesive layer is disposed in the first groove, and the second protrusion is embedded in the first groove to contact the adhesive layer.

[0019] According to one aspect of the above technical solution, the joining surface between the enclosure and the light-transmitting member is an inclined surface, and the enclosure is covered with a SiO2 film layer at least on the joining surface.

[0020] According to one aspect of the above technical solution, the light-transmitting member is an epoxy sheet or a concave lens.

[0021] Compared with the prior art, the RGB-LED lamp bead structure shown in the present invention has the following beneficial effects:

[0022] The LED bracket includes a base and an enclosure, an LED chip is arranged on the base, and an enclosure is extended from the edge of the base, the enclosure and the base are enclosed together to form an accommodating space, and then a light-transmitting member is covered on the enclosure, and a connecting component is provided on the joint surface between the enclosure and the light-transmitting member. When the light-transmitting member is covered on the enclosure, a firm connection between the enclosure and the light-transmitting member is achieved through the connecting component on the joint surface between the enclosure and the light-transmitting member, and the sealing between the enclosure and the light-transmitting member is improved, which can effectively prevent water vapor from intruding, and at the same time reduce the amount of glue dispensing to save costs, avoid the problem of lamp beads being defective due to the internal stress of the packaging glue and the later aging of the glue, and improve the performance of the lamp beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram showing the structure of an RGB-LED lamp bead in one embodiment of the present invention;

[0025] Figure 2 This is an exploded schematic diagram showing the structure of an RGB-LED lamp bead in one embodiment of the present invention;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of the connection components in section A;

[0027] Figure 4 This is a schematic diagram showing the structure of the connection components in the RGB-LED lamp bead structure shown in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram showing the structure of an RGB-LED lamp bead in another embodiment of the present invention;

[0029] Description of Figure Numbers:

[0030] LED bracket 10, base 11, enclosure 12, accommodating space 13, LED chip 20, positive pin 31, negative pin 32, wire 40, light-transmitting member 50, connecting component 60, first connecting part 61, first groove 611, first protrusion 612, second connecting part 62, second protrusion 621, second groove 622, adhesive layer 63, SiO2 film layer 70. DETAILED DESCRIPTION

[0031] To make the objectives, features, and advantages of the present invention more readily apparent, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Example 1

[0034] See also Figure 1-Figure 2 The first embodiment of the present invention provides an RGB-LED lamp bead structure for display, which includes an LED bracket 10, on which an LED chip 20 is provided, including a first LED chip, a second LED chip and a third LED chip, such as an R-LED chip, a G-LED chip and a B-LED chip, which are used to emit red light, green light and blue light respectively. The LED bracket 10 includes a base 11 and a barrier 12 extending from the edge of the base 11. The base 11 is made of an insulating material such as a ceramic substrate, and is provided with an adhesive portion for fixing the LED chip 20. The above-mentioned first LED chip, second LED chip and third LED chip are fixed on the base 11 through the adhesive portion, and the light-emitting surface faces the side away from the base 11. The barrier 12 is used to cooperate with the base 11 to enclose to form a accommodating space 13, which is shaped like a cup-bowl structure. The above-mentioned first LED chip, second LED chip and third LED chip are arranged on the base 11 in the accommodating space 13. Of course, the wire 40 and the bonding portion of the electrode used for bonding with the first LED chip, the second LED chip and the third LED chip are all located in the accommodating space 13. The first LED chip, the second LED chip and the third LED chip are all bonded to the bonding portion of the electrode through the wire 40 to be electrically connected to the positive pin 31 and the negative pin 32 of the lamp bead structure.

[0035] Among them, the positive pin 31 and the negative pin 32 of the lamp bead structure are both metal structures, usually made of copper. This is because it has good conductivity and corrosion resistance, and its chemical properties are relatively stable. The bonding part located in the accommodating space 13 is used to connect to the corresponding LED chip 20 through the wire 40, and the part of the positive pin 31 and the negative pin 32 exposed from the enclosure 12 is used to be welded and fixed to the positive and negative poles of the PCB circuit board to achieve electrical connection between the LED chip 20 and the PCB circuit board.

[0036] In this embodiment, to enhance the sealing of the lamp structure, a connecting assembly 60 is provided between the enclosure 12 and the light-transmitting member 50. This connecting assembly 60 is used to securely connect the light-transmitting member 50 to the enclosure 12, thereby reducing the possibility of moisture intrusion during use. The light-transmitting member 50 is used to guide light when the LED chip 20 is powered on. As a separate component from the bracket, it is required to provide good moisture isolation between it and the bracket's enclosure 12 to enhance sealing.

[0037] Specifically, if Figure 4 As shown, the connecting component 60 includes a first connecting portion 61 provided on the enclosure 12, and a second connecting portion 62 provided on the light-transmitting member 50. Since the light-transmitting member 50 is provided on the enclosure 12, the first connecting portion 61 is provided at the top of the enclosure 12, and the second connecting portion 62 is provided at the bottom of the light-transmitting member 50. The above-mentioned first connecting portion 61 and the second connecting portion 62 are interlocked to realize the connection between the enclosure 12 and the light-transmitting member 50. When the first connecting portion 61 and the second connecting portion 62 are interlocked, the sealing performance can be effectively improved.

[0038] More specifically, the above-mentioned first connecting portion 61 is a groove formed on the enclosure 12, and the second connecting portion 62 is a protrusion formed on the light-transmitting member 50, and the positions of the first connecting portion 61 and the second connecting portion 62 correspond to each other. Specifically, when the light-transmitting member 50 is covered on the enclosure 12, the second connecting portion 62 can be embedded in the first connecting portion 61. Then, by forming a joint surface that is at least partially curved between the enclosure 12 and the light-transmitting member 50, it can effectively improve the structural stability of the light-transmitting member 50 covering the enclosure 12, and can effectively improve the sealing between the light-transmitting member 50 and the enclosure 12. Then, water vapor is not easy to invade the accommodating space 13 and cause corrosion to the LED chip 20, etc., which is beneficial to improving the service life of the lamp bead structure.

[0039] It is easy to understand that in the prior art, the joining surface between the light-transmitting member 50 and the enclosure 12 is a plane, which is, for example, a horizontal plane or an inclined plane, which is essentially a plane. When water vapor invades the joining surface between the two during use, the water vapor can directly enter the accommodating space 13, thereby shortening the service life of the lamp bead structure; while the joining surface between the light-transmitting member 50 and the enclosure 12 shown in this embodiment is an inclined surface, and the inclined surface is also formed by the connecting component 60 to form at least a partially curved surface, so water vapor is not easy to invade during use, thereby effectively improving the service life of the lamp bead structure. In addition, in order to ensure the structural stability of the light-transmitting member 50 when it is covered on the enclosure 12, the interior of the first connecting portion 61 in the form of a groove is filled with an adhesive layer 63, such as liquid glue, which is required to have good viscosity. When the light-transmitting member 50 is covered on the enclosure 12, the second connecting portion 62 in the form of a protrusion can be embedded in the first connecting portion 61 and contact with the adhesive layer 63. The provision of the adhesive layer 63 can improve the bonding strength between the enclosure 12 and the light-transmitting member 50, and can block water vapor, thereby improving the sealing.

[0040] In addition, the light-transmitting member 50 shown in this embodiment can be an epoxy sheet (such as Figure 1 、 2 ), or a concave lens (as Figure 5 As shown), it is used to guide the light emitted by the LED chip 20, for example, by increasing the diffusion angle of the light through the setting of the light-transmitting member 50.

[0041] In summary, the RGB-LED lamp bead structure shown in this embodiment has the following beneficial effects:

[0042] The LED bracket 10 includes a base 11 and an enclosure 12, an LED chip 20 is arranged on the base 11, and the enclosure 12 is extended from the edge of the base 11, the enclosure 12 and the base 11 are enclosed together to form an accommodating space 13, and then a light-transmitting member 50 is covered on the enclosure 12, and a connecting component 60 is provided on the joint surface between the enclosure 12 and the light-transmitting member 50. When the light-transmitting member 50 is covered on the enclosure 12, the enclosure 12 and the light-transmitting member 50 are firmly connected through the connecting component 60 on the joint surface between the enclosure 12 and the light-transmitting member 50, and the sealing between the enclosure 12 and the light-transmitting member 50 is improved, which can effectively prevent water vapor from intruding, and at the same time reduce the amount of glue dispensing to save costs, avoid the problem of lamp beads being defective due to the internal stress of the packaging glue and the later aging of the glue, and improve the performance of the lamp beads.

[0043] Example 2

[0044] Please combine Figure 3The second embodiment of the present invention also provides a display RGB-LED lamp bead structure. The lamp bead structure shown in this embodiment is basically the same as the lamp bead structure shown in the first embodiment, except that:

[0045] In this embodiment, two of the first connecting portions 61 and two of the second connecting portions 62 are provided.

[0046] One of the two first connecting portions 61 is recessed inward from the surface of the enclosure 12 to form a first groove 611, and the other is a first protrusion 612 connected to the first groove 611. One of the two second connecting portions 62 is a second protrusion 621 corresponding to the first groove 611, and the other is a second groove 622 corresponding to the first protrusion 612. The adhesive layer 63 is disposed within the first groove 611, and the second protrusion 621 is embedded in the first groove 611 to contact the adhesive layer 63. Furthermore, the bonding surface between the enclosure 12 and the light-transmitting member 50 is an inclined surface, and at least the bonding surface of the enclosure 12 is covered with a SiO2 film 70.

[0047] Specifically, in order to further improve the structural stability and sealing performance between the enclosure 12 and the light-transmitting member 50 in this embodiment, two first connecting parts 61 are provided on the enclosure 12 and two second connecting parts 62 are provided on the light-transmitting member 50. The two first connecting parts 61 provided on the enclosure 12 and the two second connecting parts 62 provided on the light-transmitting member 50 are matched and connected respectively to achieve a stable connection between the enclosure 12 and the light-transmitting member 50 and improve the sealing.

[0048] For example, among the two first connecting parts 61, the first connecting part 61 close to the outside is a first groove 611, and the first connecting part 61 close to the inside is a first protrusion 612, and the first connecting part 61 and the second connecting part 62 are interconnected, that is, the first groove and the first protrusion 612 are continuously formed on the joint surface of the enclosure 12; since the second connecting part 62 is matched with the first connecting part 61, among the two second connecting parts 62, the second connecting part 62 close to the outside is a second protrusion 621, and the second connecting part 62 close to the inside is a second groove.

[0049] During assembly, when the light-transmitting member 50 is placed on the enclosure 12, the first protrusion 612 on the joint surface of the enclosure 12 is embedded in the second groove 622 on the joint surface of the light-transmitting member 50, and the second protrusion 621 on the joint surface of the light-transmitting member 50 is simultaneously embedded in the first groove 611 on the joint surface of the enclosure 12, thereby achieving mutual engagement. Furthermore, the adhesive layer 63 is filled in the first groove, and the second protrusion 621 can contact the adhesive layer 63 when embedded. After the adhesive layer 63 cures, the enclosure 12 and the light-transmitting member 50 are firmly connected, further improving the structural stability and sealing of the enclosure 12 and the light-transmitting member.

[0050] On this basis, a larger number of first connecting portions 61 can be provided on the joint surface of the enclosure 12, with the plurality of first connecting portions 61 employing a configuration in which grooves and protrusions are interlaced, and a corresponding number of second connecting portions 62 are provided on the joint surface of the light-transmitting member 50, employing a configuration in which protrusions and grooves are interlaced, to further enhance the secure connection and sealing performance between the enclosure 12 and the light-transmitting member 50. Of course, adopting such a structure will undoubtedly increase costs, so it is only necessary to configure it according to actual needs.

[0051] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0052] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A display RGB-LED lamp bead structure, characterized in that: The lamp bead structure includes: An LED bracket having an LED chip disposed thereon; A positive electrode pin, to which the positive electrode of the LED chip is connected via wire bonding; A cathode pin, to which the cathode of the LED chip is connected via wire bonding; In which, the LED bracket includes a base and an enclosure extending from the edge of the base, the enclosure is enclosed on the base to form an accommodating space, the LED chip is arranged on the base in the accommodating space, and a side cover of the enclosure away from the base is provided with a light-transmitting member, and a connecting component is provided on the joint surface between the light-transmitting member and the enclosure, and the light-transmitting member is covered on the enclosure through the connecting component to close the accommodating space.

2. The RGB-LED lamp bead structure according to claim 1, characterized in that: The connecting assembly includes at least one first connecting portion provided on the enclosure, and at least one second connecting portion provided on the light-transmitting member, wherein the first connecting portion is engaged with the second connecting portion.

3. The RGB-LED lamp bead structure according to claim 2, characterized in that: The connection assembly further includes an adhesive layer disposed between the first connection portion and the second connection portion.

4. The RGB-LED lamp bead structure according to claim 3, characterized in that: Either one of the first connecting portion and the second connecting portion is a groove, and the other is a protrusion corresponding to the groove.

5. The RGB-LED lamp bead structure according to claim 4, characterized in that: The first connecting portion is a groove, the second connecting portion is a protrusion, and the adhesive layer fills the interior of the first connecting portion in the form of a groove.

6. The RGB-LED lamp bead structure according to claim 2, characterized in that: There are two of each of the first connecting portion and the second connecting portion.

7. The RGB-LED lamp bead structure according to claim 6, characterized in that: One of the two first connection parts is recessed inward from the surface of the enclosure to form a first groove, and the other is a first protrusion connected to the first groove. One of the two second connection parts is a second protrusion corresponding to the first groove, and the other is a second groove corresponding to the first protrusion.

8. The RGB-LED lamp bead structure according to claim 7, characterized in that: The adhesive layer is disposed in the first groove, and the second protrusion is embedded in the first groove to contact the adhesive layer.

9. The RGB-LED lamp bead structure according to any one of claims 1 to 8, characterized in that: The joining surface between the enclosure and the light-transmitting member is an inclined surface, and the enclosure is covered with a SiO2 film layer at least on the joining surface.

10. The RGB-LED lamp bead structure according to claim 9, characterized in that: The light-transmitting member is an epoxy sheet or a concave lens.

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