LED lamp bead capable of preventing silica gel from stripping

Abstract

The utility model discloses an LED lamp bead capable of preventing stripping of silica gel, which comprises an LED support, an LED wafer and a lead frame, LED protection silica gel is filled in an inner cavity of the LED support, the LED support is provided with conducting holes, each conducting hole respectively penetrates through the top surface of the LED support and the inner side wall of the inner cavity of the LED support, and each conducting hole is respectively communicated with the inner cavity of the LED support. According to the utility model, the through holes are designed on the LED support, and when the LED protection silica gel is poured into the inner cavity of the LED support, the LED protection silica gel can be poured into each through hole at the same time and is solidified and shaped in each through hole, so that the binding force between the LED support and the LED protection silica gel can be greatly improved; the problem that the silica gel filled in the LED lamp bead is separated from the LED support due to glue cracking under the special conditions of high temperature or high temperature and high humidity is effectively avoided, the reliability of the LED lamp bead is greatly improved, and the service life of the LED lamp bead is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of LED lamp bead technology, and more specifically, to an LED lamp bead that can prevent silicone peeling. Background Technology

[0002] LED light sources are widely used due to their advantages such as low-voltage power supply, low energy consumption, wide applicability, high stability, short response time, no environmental pollution, and multi-color emission. Existing LED light sources typically include components such as LED brackets, LED chips, and lead frames. For example, a sulfur-resistant LED lighting source (patent publication number CN203733849U) uses conductive adhesive to fix the LED chip to the support base of the lead frame. This type of LED lighting source has good airtightness. However, the inner wall of the LED bracket in this type of LED light source is smooth, resulting in poor adhesion between the adhesive and the bracket. Under special operating environments (such as high temperature or high temperature and humidity conditions), the adhesive may crack or completely detach from the bracket, significantly reducing the reliability of the LED light source. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an LED bead that can improve the bonding force between the LED bracket and the LED protective silicone and prevent silicone peeling.

[0004] To achieve the above objectives, this utility model provides an LED bead that prevents silicone peeling, comprising an LED bracket, an LED chip, and a lead frame. The LED chip is installed inside the inner cavity of the LED bracket and is connected to the lead frame installed at the lower end of the LED bracket via a connecting wire. The inner cavity of the LED bracket is filled with LED protective silicone, and the LED chip is encased inside by the cured LED protective silicone. The LED bracket has at least two symmetrically arranged through holes. The upper end of each through hole penetrates the top surface of the LED bracket, and the lower end of each through hole penetrates the inner sidewall of the inner cavity of the LED bracket. The lower end of each through hole is connected to the inner cavity of the LED bracket. When the LED protective silicone is poured into the inner cavity of the LED bracket, the LED protective silicone is also simultaneously poured into each through hole and cured and shaped within each through hole.

[0005] Preferably, the through hole is configured as an arc-shaped through hole or an inclined straight through hole.

[0006] Preferably, four through holes are provided and distributed at the four corners of the LED bracket.

[0007] Preferably, the LED bracket is configured as a PLCC bracket.

[0008] Preferably, the lead frame is configured as a lead frame with a silver or gold plating on its surface.

[0009] Preferably, the lead frame includes a first lead portion and a second lead portion, the cross-sectional shape of the first lead portion and the second lead portion is respectively set to U-shape, and one end of the first lead portion and the second lead portion extends out to both sides of the LED bracket.

[0010] Preferably, the bottom of the LED chip is fixedly connected to the lead frame by thermally conductive die bond adhesive.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model has a reasonable structural design. It features through-holes in the LED bracket, so that when the LED protective silicone is injected into the inner cavity of the LED bracket, it can also be injected into each through-hole and cured in each through-hole. This greatly improves the bonding force between the LED bracket and the LED protective silicone, effectively avoiding the problem of adhesive cracking, delamination or detachment between the internal filling silicone and the LED bracket under special conditions of high temperature or high temperature and high humidity. This greatly improves the reliability and service life of the LED beads. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a top view of an LED bead that prevents silicone peeling, provided in an embodiment of this utility model.

[0015] Figure 2 This is a cross-sectional view of an LED bead that prevents silicone peeling, provided in an embodiment of the present invention.

[0016] Figure 3 This is a cross-sectional view of the LED beads that prevent silicone peeling provided in this embodiment of the utility model after the LED protective silicone has been removed. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Please refer to Figure 1 and Figure 2 The present invention provides an LED bead that can prevent silicone peeling, including an LED bracket 1, an LED chip 2 and a lead frame 3. The components of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] In this embodiment, the LED bracket 1 can preferably be configured as a PLCC bracket.

[0020] like Figures 1 to 3 As shown, the LED chip 2 is installed inside the cavity 11 of the LED bracket 1, and the bottom of the LED chip 2 can be fixedly connected to the lead frame 3 installed at the lower end of the LED bracket 1 by thermally conductive die bond adhesive.

[0021] In this embodiment, the lead frame 3 is preferably configured as a lead frame with a silver or gold plating layer on its surface. Specifically, the lead frame 3 may include a first pin portion 31 and a second pin portion 32. The cross-sectional shape of the first pin portion 31 and the second pin portion 32 is respectively set as U-shaped. One end of the first pin portion 31 and the second pin portion 32 extends out of both sides of the LED bracket 1. The LED chip 2 can be mounted on the top of the second pin portion 32, and the LED chip 2 can also be connected to the first pin portion 31 through a connecting wire 5 (such as gold wire, copper wire, etc.).

[0022] like Figures 1 to 3 As shown, the LED bracket 1 has four symmetrically arranged through holes 12, which are distributed at the four corners of the LED bracket 1. The upper end of each through hole 12 penetrates the top surface of the LED bracket 1, and the lower end of each through hole 12 penetrates the inner wall of the inner cavity 11 of the LED bracket 1, and the lower end of each through hole 12 is connected to the inner cavity 11 of the LED bracket 1.

[0023] Preferably, the through hole 12 can be set as an arc-shaped through hole, but it can also be set as an inclined straight through hole, an L-shaped through hole or other shapes of through hole.

[0024] In the specific manufacturing process, LED protective silicone 4 is injected into the inner cavity 11 of the LED bracket 1. When the LED protective silicone 4 is injected into the inner cavity 11 of the LED bracket 1, it is also injected into each through hole 12 and cured and shaped in each through hole 12.

[0025] In summary, the present invention has a reasonable structural design. The design of through holes on the LED bracket allows LED protective silicone to be injected into each through hole simultaneously and cured and shaped within each hole. This greatly enhances the bonding force between the LED bracket and the LED protective silicone, effectively preventing the internal silicone from cracking, delaminating, or detaching from the LED bracket under special conditions such as high temperature or high temperature and humidity. This significantly improves the reliability and lifespan of the LED beads.

[0026] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An LED bead that prevents silicone peeling, comprising an LED bracket, an LED chip, and a lead frame, wherein the LED chip is mounted in the inner cavity of the LED bracket, the LED chip is connected to the lead frame mounted at the lower end of the LED bracket via a connecting wire, the inner cavity of the LED bracket is filled with LED protective silicone, and the LED chip is encapsulated inside by the cured LED protective silicone, characterized in that: The LED bracket is provided with at least two symmetrically arranged through holes. The upper end of each through hole penetrates the top surface of the LED bracket, and the lower end of each through hole penetrates the inner sidewall of the inner cavity of the LED bracket. The lower end of each through hole is connected to the inner cavity of the LED bracket. When LED protective silicone is injected into the inner cavity of the LED bracket, the LED protective silicone is also injected into each through hole and cured and shaped in each through hole.

2. The LED bead that prevents silicone peeling according to claim 1, characterized in that: The through hole is configured as an arc-shaped through hole or an inclined straight through hole.

3. The LED bead that prevents silicone peeling according to claim 1, characterized in that: Four through holes are provided and distributed at the four corners of the LED bracket.

4. The LED bead that prevents silicone peeling according to claim 1, characterized in that: The LED bracket is configured as a PLCC bracket.

5. An LED bead capable of preventing silicone peeling according to claim 1, characterized in that: The lead frame is configured to have a silver or gold plating on its surface.

6. An LED bead that prevents silicone peeling according to claim 1, characterized in that: The lead frame includes a first lead portion and a second lead portion, the cross-sectional shape of the first lead portion and the second lead portion is respectively set to U-shape, and one end of the first lead portion and the second lead portion extends out to both sides of the LED bracket.

7. An LED bead that prevents silicone peeling according to claim 1, characterized in that: The bottom of the LED chip is fixedly connected to the lead frame by thermally conductive die-bonding adhesive.

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