LED lamp bead

Abstract

The utility model relates to the technical field of LEDs, in particular to an LED lamp bead which comprises a support and an LED chip, a bowl cup is arranged at the upper end of the support, the LED chip is located in the middle of the inner bottom of the bowl cup, a bonding pad is embedded in the support, the LED chip is connected with the bonding pad through a wire, a transmission film which covers the LED chip and is in a convex lens shape is arranged in the bowl cup, the bowl cup is divided into an upper cavity and a lower cavity through the transmission film, and the upper cavity and the lower cavity are communicated with each other. A glue injection channel for communicating the upper cavity with the lower cavity is arranged in the bracket, and the upper cavity, the lower cavity and the glue injection channel are filled with fluorescent glue. Through the arrangement of the transmission film and the glue injection channel, the fluorescent glue in the lower cavity is matched with the transmission film to form a convex lens, light emitted by the LED chip can be diffused, and the light emitting angle of the lamp bead is increased; in addition, the fluorescent glue can effectively extend into the support through the glue injection channel, the sealing effect of the fluorescent glue on the LED chip is improved, and it is guaranteed that the lamp bead can stably work for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of LEDs, in particular to an LED lamp bead. Background Art

[0002] LED lamp beads are a new type of green light source with low energy consumption, high brightness, long life, fast response speed, small size, low pollution and a wide range of applications. They are used in a wide range of occasions.

[0003] In the prior art, the manufacturing process of lamp beads is to package the light-emitting chip into the bracket through a die bonding machine, and then directly package the light-emitting chip with fluorescent glue to complete the manufacturing of the lamp beads. However, if the fluorescent glue is directly packaged, the light range emitted by the light-emitting chip is small, and the light cannot be well utilized; and after the existing lamp beads have been used for a certain period of time, the adhesion between the fluorescent glue and the inner wall of the bracket is insufficient, and gaps are easily generated between the pad and the bracket, which makes it easy for external moisture and debris to affect the normal performance of the light-emitting chip. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an LED lamp bead.

[0005] The utility model provides the following technical solution: an LED lamp bead, comprising a bracket and an LED chip, wherein a bowl cup is provided at the upper end of the bracket, the LED chip is located in the middle of the inner bottom of the bowl cup, a soldering pad is embedded in the bracket, the LED chip is connected to the soldering pad through a wire, a transmissive film is provided in the bowl cup which covers the LED chip and is in the shape of a convex lens, the transmissive film divides the bowl cup into an upper cavity and a lower cavity, a glue injection channel which connects the upper cavity and the lower cavity is provided in the bracket, and the upper cavity, the lower cavity and the glue injection channel are all filled with fluorescent glue.

[0006] The LED lamp bead of one embodiment of the utility model is provided with a transmission film and a glue injection channel, so that the fluorescent glue injected from the upper cavity can enter the lower cavity from the glue injection channel, and the fluorescent glue in the lower cavity cooperates with the transmission film to form a convex lens, which can diffuse the light emitted by the LED chip and increase the light-emitting angle of the lamp bead; and because the fluorescent glue first falls on the transmission film, the transmission film can be pressed tightly, thereby ensuring that the fluorescent glue in the lower cavity can tightly fill the lower cavity, ensuring the divergence effect of the convex lens formed in the lower cavity; in addition, the glue injection channel can effectively extend the fluorescent glue to the inside of the bracket, thereby improving the sealing effect of the fluorescent glue on the LED chip and ensuring that the lamp bead can work stably for a long time.

[0007] Furthermore, the glue injection channel is in a smooth arc shape, and there are at least two glue injection channels.

[0008] Furthermore, the bowl is divided into a first opening and a second opening from bottom to top, and a first inclination angle formed between the first opening and the side wall of the bracket is smaller than a second inclination angle formed between the second opening and the side wall of the bracket.

[0009] Furthermore, an upper end of the transmissive film is flush with a boundary line between the first opening and the second opening.

[0010] Furthermore, the transmissive film is a hard transparent film.

[0011] Furthermore, the welding pad includes an upper horizontal section, a vertical section and a lower horizontal section that are interconnected, the upper horizontal section is located on the inner bottom surface of the bowl, the vertical section is located on the lower end side wall of the bracket, and the lower horizontal section is located on the lower end surface of the bracket.

[0012] Furthermore, a plurality of partition grooves are provided at an upper end of a side of the upper transverse section away from the bowl and cup, and the partition grooves are adapted to the upper transverse section.

[0013] Furthermore, one end of the lower transverse section close to the center of the bracket is bent upward and embedded in the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 This is a front cross-sectional schematic diagram of the LED lamp bead of the utility model;

[0016] Figure 2 This is a front cross-sectional schematic diagram of the LED lamp bead of the utility model after the fluorescent glue is removed;

[0017] Figure 3 It is a side cross-sectional schematic diagram of the LED lamp bead of the utility model after the fluorescent agent is removed;

[0018] Figure 4 It is a schematic diagram of the structure of the soldering pad in the LED lamp bead of the present utility model.

[0019] Description of reference numerals:

[0020] 10. Bracket; 11. LED chip; 12. Bowl; 121. Upper cavity; 122. Lower cavity; 123. Glue injection channel; 124. First opening; 125. Second opening; 13. Solder pad; 131. Upper horizontal section; 132. Vertical section; 133. Lower horizontal section; 134. Partition groove; 14. Wire; 15. Transmissive film; 16. Fluorescent glue. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] Reference Figures 1 to 4In one embodiment of the utility model, an LED lamp bead includes a bracket 10 and an LED chip 11. A bowl cup 12 is provided at the upper end of the bracket 10. The LED chip 11 is located in the middle of the inner bottom of the bowl cup 12. A solder pad 13 is embedded in the bracket 10. The LED chip 11 is connected to the solder pad 13 through a wire 14. A transmissive film 15 is provided in the bowl cup 12 to cover the LED chip 11 and is in the shape of a convex lens. The transmissive film 15 divides the bowl cup 12 into an upper cavity 121 and a lower cavity 122. A glue injection channel 123 is provided in the bracket 10 to connect the upper cavity 121 and the lower cavity 122. The upper cavity 121, the lower cavity 122 and the glue injection channel 123 are all filled with fluorescent glue 16.

[0026] The LED lamp bead of one embodiment of the utility model is provided with a transmissive film 15 and a glue injection channel 123, so that the fluorescent glue 16 injected from the upper cavity 121 can enter the lower cavity 122 from the glue injection channel 123, and the fluorescent glue 16 in the lower cavity 122 cooperates with the transmissive film 15 to form a convex lens, which can diffuse the light emitted by the LED chip 11 and increase the light-emitting angle of the lamp bead; and because the fluorescent glue 16 first falls on the transmissive film 15, the transmissive film 15 can be pressed, thereby ensuring that the fluorescent glue 16 in the lower cavity 122 can tightly fill the lower cavity 122, ensuring the divergence effect of the convex lens formed by the lower cavity 122; in addition, the glue injection channel 123 can effectively extend the fluorescent glue 16 to the inside of the bracket 10, thereby improving the sealing effect of the fluorescent glue 16 on the LED chip 11 and ensuring that the lamp bead can work stably for a long time.

[0027] The glue injection channel 123 is in a smooth arc shape, the upper end of the glue injection channel 123 is connected to the upper cavity 121, and the lower end is connected to the lower cavity 122. There are at least two glue injection channels 123; the smooth arc shape is more conducive to the flow of the fluorescent glue 16, ensuring that the fluorescent glue 16 can smoothly enter the lower cavity 122; in this embodiment, there are two glue injection channels 123, the upper end opening of the glue injection channel 123 is located on the middle inner wall of the upper cavity 121, and the lower end opening of the glue injection channel 123 is located on the lower end inner wall of the lower cavity 122; in specific implementation, the glue injection channels 123 can be interconnected to form an arc-shaped cavity, further ensuring the sealing effect of the fluorescent glue 16 on the LED chip 11, and being able to improve the stability of the connection between the fluorescent glue 16 and the bowl cup 12.

[0028] The bowl cup 12 is divided into a first opening 124 and a second opening 125 from bottom to top. The first inclination angle formed between the first opening 124 and the side wall of the bracket 10 is smaller than the second inclination angle formed between the second opening 125 and the side wall of the bracket 10; the second opening 125 at the upper end has a larger inclination angle, so that the upper end opening of the bowl cup 12 is larger. Under the action of the transparent film 15, the light-emitting angle of the LED chip 11 can be effectively increased, and the light-emitting effect of the lamp bead can be improved; in this embodiment, the curvature of the second opening 125 is 135°; the upper end of the transparent film 15 is flush with the dividing line between the first opening 124 and the second opening 125; the diffusion effect produced by the transparent film 15 is maximized, and the light-emitting angle of the LED chip 11 is effectively increased.

[0029] The transmissive film 15 is a hard transparent film; the hard transmissive film 15 can effectively support the fluorescent glue 16 in the upper cavity 121, and the transparent material can ensure the diffusion effect of the light emitted by the LED chip 11; in this embodiment, the transmissive film 15 is made of transparent optical glue.

[0030] The soldering pad 13 includes an upper transverse section 131, a vertical section 132 and a lower transverse section 133 which are connected to each other. The upper transverse section 131 is partially located on the inner bottom surface of the bowl 12, the vertical section 132 is located on the lower end side wall of the bracket 10, and the lower transverse section 133 is located on the lower end surface of the bracket 10; a plurality of partition grooves 134 are provided on the upper end of the upper transverse section 131 away from the bowl 12, and the partition grooves 134 are adapted to the upper transverse section 131; one end of the lower transverse section 133 close to the center of the bracket 10 is bent upward and embedded in the bracket 10; the soldering pad 13 serves as an electrical connection point for the lamp bead, and the vertical section 132 and the lower transverse section 133 are connected to the upper transverse section 131 ... 133 are all located on the outside of the bracket 10, which can ensure that the lamp beads and the display module have sufficient welding area; the setting of the partition groove 134 can effectively block water vapor and debris from entering the bowl cup 12 from the welding pad 13, affecting the performance of the LED chip 11. Similarly, the end of the lower horizontal section 133 close to the center of the bracket 10 is bent upward and embedded in the bracket 10, which also has this effect and can improve the stability of the connection between the welding pad 13 and the bracket 10; in this embodiment, the welding pad 13 is divided into a negative electrode welding pad and a positive electrode welding pad, which are respectively located on both sides of the bracket 10, and the two welding pads 13 have the same structure.

[0031] In this embodiment, when packaging the lamp bead, the LED chip 11 is first packaged and fixed in the bowl cup 12, and then the transparent film 15 is placed in the bowl cup 12 to cover the LED chip 11, and then the fluorescent glue 16 is poured into the bowl cup 12 to fill the upper cavity 121, the glue injection channel 123 and the lower cavity 122, thereby completing the packaging of the lamp bead.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An LED lamp bead, comprising a bracket and an LED chip, It is characterized in that A bowl cup is provided at the upper end of the bracket, the LED chip is located in the middle of the inner bottom of the bowl cup, a soldering pad is embedded in the bracket, the LED chip is connected to the soldering pad through a wire, a transmissive film is provided in the bowl cup to cover the LED chip and is in the shape of a convex lens, the transmissive film divides the bowl cup into an upper cavity and a lower cavity, a glue injection channel is provided in the bracket to connect the upper cavity and the lower cavity, and the upper cavity, the lower cavity and the glue injection channel are all filled with fluorescent glue.

2. The LED lamp bead according to claim 1, It is characterized in that The glue injection channel is in a smooth arc shape, and at least two of the glue injection channels are provided.

3. The LED lamp bead according to claim 1, It is characterized in that The bowl is divided into a first opening and a second opening from bottom to top, and a first inclination angle formed between the first opening and the side wall of the bracket is smaller than a second inclination angle formed between the second opening and the side wall of the bracket.

4. The LED lamp bead according to claim 3, It is characterized in that An upper end of the transmissive film is flush with a boundary line between the first opening and the second opening.

5. The LED lamp bead according to claim 1, It is characterized in that The transmission film is a hard transparent film.

6. The LED lamp bead according to claim 1, It is characterized in that The welding pad includes an upper horizontal section, a vertical section and a lower horizontal section which are connected to each other. The upper horizontal section is located on the inner bottom surface of the bowl, the vertical section is located on the lower end side wall of the bracket, and the lower horizontal section is located on the lower end surface of the bracket.

7. The LED lamp bead according to claim 6, It is characterized in that A plurality of partition grooves are provided at the upper end of the upper transverse section away from the bowl and cup, and the partition grooves are matched with the upper transverse section.

8. The LED lamp bead according to claim 6, It is characterized in that One end of the lower transverse section close to the center of the bracket is bent upward and embedded in the bracket.

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