Electrodeless single-color LED lamp bead

Abstract

The utility model discloses an electrodeless single-color LED lamp bead which comprises an insulating support, a first electrode plate, a second electrode plate, a first LED chip and a second LED chip. The first electrode plate and the second electrode plate are wrapped by the insulating support, the insulating support forms a box dam on the upper surfaces of the first electrode plate and the second electrode plate, and part of plate surfaces of the first electrode plate and the second electrode plate are exposed in an area defined by the box dam; electrode pins extend from the first electrode plate and the second electrode plate on the two sides of the insulating bracket respectively; the first LED chip and the second LED chip are separately mounted on the first electrode plate in an area enclosed by the box dam; the positive electrode of the first LED chip is connected with the first electrode plate, and the negative electrode of the first LED chip is connected with the second electrode plate; the positive electrode of the second LED chip is connected with the second electrode plate, and the negative electrode of the second LED chip is connected with the first electrode plate; and fluorescent glue is encapsulated in an area enclosed by the box dam. According to the utility model, the circuit can work under forward current and reverse current.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lighting, in particular to a stepless single-color LED lamp bead. Background Art

[0002] The core of an LED is a light-emitting diode (LED) composed of P-type and N-type semiconductor materials. When current flows through it, electrons and holes recombine near the PN junction, releasing energy in the form of photons, thereby emitting light. LEDs are unidirectional and can only conduct (be powered) in one direction, requiring a distinction between the positive and negative ends of the power supply. However, due to the unidirectional conductivity of LEDs, LEDs have some shortcomings in practical applications. In particular, in AC circuits, AC driving is difficult. This is because the direction of AC current changes periodically, while LEDs only allow current to flow in one direction. This requires the use of a rectifier to convert AC to DC, which increases the cost of circuit design. Furthermore, during the assembly process of LEDs, it is necessary to identify the polarity of the LEDs corresponding to the positive and negative ends of the circuit, necessitating the establishment of a polarity identification process and corresponding equipment, increasing production costs and reducing production efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a stepless single-color LED lamp bead which can work under forward current and reverse current.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A stepless monochrome LED lamp bead comprises an insulating support, a first electrode plate, a second electrode plate, a first LED chip, and a second LED chip; the first electrode plate and the second electrode plate are arranged at intervals on the same horizontal plane and are covered by the insulating support; the insulating support forms a dam on the upper surfaces of the first electrode plate and the second electrode plate, and the area enclosed by the dam exposes part of the plate surface of the first electrode plate and the second electrode plate; the first electrode plate has a first electrode pin extending along the side of the insulating support on one side of the insulating support; the second electrode plate has a second electrode pin extending along the side of the insulating support on the other side of the insulating support; the first LED chip and the second LED chip are mounted on the first electrode plate at intervals within the area enclosed by the dam; the positive electrode of the first LED chip is connected to the first electrode plate, and the negative electrode of the first LED chip is connected to the second electrode plate; the positive electrode of the second LED chip is connected to the second electrode plate, and the negative electrode of the second LED chip is connected to the first electrode plate; the area enclosed by the dam is filled with fluorescent glue, and the fluorescent glue covers the first electrode plate, the second electrode plate, the first LED chip, and the second LED chip.

[0006] As a preferred solution of the present invention, the first LED chip is a front-mounted chip, and the side of the first LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding glue. The positive and negative poles of the first LED chip are both arranged on the side of the chip away from the first electrode plate. The positive pole of the first LED chip is connected to the first electrode plate through a wire, and the negative pole of the first LED chip is connected to the second electrode plate through a wire.

[0007] As a preferred solution of the present invention, the second LED chip is a front-mounted chip, and the side of the second LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding glue. The positive and negative poles of the second LED chip are both arranged on the side of the chip away from the first electrode plate. The positive pole of the second LED chip is connected to the second electrode plate through a wire, and the negative pole of the second LED chip is connected to the first electrode plate through a wire.

[0008] As a preferred solution of the present invention, the first LED chip is a flip chip, the positive electrode of the first LED chip is arranged on the side of the chip close to the first electrode plate, the positive electrode of the first LED chip is connected to the first electrode plate through a conductive bonding glue, the negative electrode of the first LED chip is arranged on the side of the chip away from the first electrode plate, and the negative electrode of the first LED chip is connected to the second electrode plate through a wire.

[0009] As a preferred solution of the present invention, the second LED chip is a flip chip, the negative pole of the second LED chip is arranged on the side of the chip close to the first electrode plate, the negative pole of the second LED chip is connected to the first electrode plate through a conductive bonding glue, and the positive pole of the second LED chip is arranged on the side of the chip away from the first electrode plate, and the positive pole of the second LED chip is connected to the second electrode plate through a wire.

[0010] As a preferred solution of the present invention, both the first electrode plate and the second electrode plate are copper plates.

[0011] As a preferred solution of the present invention, the first LED chip and the second LED chip are symmetrically arranged at the center of the dam.

[0012] As a preferred solution of the present invention, the area enclosed by the dam is in the shape of an inverted truncated cone.

[0013] As a preferred solution of the present invention, the insulating bracket is provided with a heat conduction hole on a side away from the dam, and the heat conduction hole is filled with heat conductive glue.

[0014] The present invention provides a non-conductive single-color LED lamp bead, which has the following beneficial effects compared with the prior art:

[0015] The stepless monochrome LED lamp bead of the present invention is achieved by mounting LED chips of opposite polarity in one lamp bead. When a forward current is passed through the lamp bead, the first LED chip lights up and the second LED chip goes out. When a reverse current is passed through the lamp bead, the first LED chip goes out and the second LED chip lights up. Therefore, the lamp bead can be in a lit state regardless of whether it is energized in the forward direction or the reverse direction. At the same time, since the lamp bead is a non-polar lamp bead, its electrode pins are not positive or negative, and there is no need to identify the electrical connection direction of the lamp bead. This provides great convenience when AC indication is required or when the polarity is unclear, thereby improving production efficiency. Furthermore, when the lamp bead is used in an AC circuit, the first LED chip and the second LED chip can be alternately lit, and the lifespan of the lamp bead is twice that of a traditional lamp bead with a built-in single LED chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.

[0017] Figure 1 This is a schematic structural diagram of a stepless monochrome LED lamp bead provided by an embodiment of the present utility model;

[0018] Figure 2 It is Figure 1 A cross-sectional view taken along line AA of the structure shown.

[0019] Markings in the figure:

[0020] Insulating bracket 1; first electrode plate 2; second electrode plate 3; first LED chip 4; second LED chip 5; dam 6; first electrode pin 7; second electrode pin 8; fluorescent glue 9; wire 10; thermal conductive glue 11. DETAILED DESCRIPTION

[0021] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0023] like Figure 1 and Figure 2As shown, the preferred embodiment of the present invention provides a stepless monochrome LED lamp bead, which includes an insulating bracket 1, a first electrode plate 2, a second electrode plate 3, a first LED chip 4 and a second LED chip 5; the first electrode plate 2 and the second electrode plate 3 are arranged at intervals on the same horizontal plane and are covered by the insulating bracket 1, and the insulating bracket 1 forms a dam 6 on the upper surface of the first electrode plate 2 and the second electrode plate 3, and the area enclosed by the dam 6 exposes part of the plate surface of the first electrode plate 2 and the second electrode plate 3; the first electrode plate 2 has a first electrode pin 7 extending from one side of the insulating bracket 1; the second electrode plate 3 is on the other side of the insulating bracket 1 A second electrode pin 8 is extended; the first LED chip 4 and the second LED chip 5 are mounted on the first electrode plate 2 in the area enclosed by the dam 6 at intervals; the positive pole of the first LED chip 4 is connected to the first electrode plate 2, and the negative pole of the first LED chip 4 is connected to the second electrode plate 3; the positive pole of the second LED chip 5 is connected to the second electrode plate 3, and the negative pole of the second LED chip 5 is connected to the first electrode plate 2; fluorescent glue 9 is filled in the area enclosed by the dam 6, and the fluorescent glue 9 covers the first electrode plate 2, the second electrode plate 3, the first LED chip 4 and the second LED chip 5.

[0024] According to the stepless monochrome LED lamp bead of the present invention, it mounts LED chips with opposite polarities in one lamp bead. When a forward current is passed through the lamp bead, the first LED chip 4 lights up and the second LED chip 5 goes out. When a reverse current is passed through the lamp bead, the first LED chip 4 goes out and the second LED chip 5 lights up. Therefore, no matter whether the lamp bead is energized in the forward direction or the reverse direction, the lamp bead can be in a lit state. At the same time, since the lamp bead is a non-polar lamp bead, its electrode pins are not positive or negative, and there is no need to identify the electrical connection direction of the lamp bead, which provides great convenience when AC indication is required or when the polarity is unclear, thereby improving production efficiency. Furthermore, when the lamp bead is used in an AC circuit, the first LED chip 4 and the second LED chip 5 can be alternately lit, and the life of the lamp bead is twice that of a traditional lamp bead with a single built-in LED chip.

[0025] It should be noted that both the first electrode plate 2 and the second electrode plate 3 are copper plates. They extend from either side of the insulating bracket 1, forming electrode pins that extend along the sides of the insulating bracket 1. This facilitates soldering the lamp bead to the circuit using solder paste. The first and second LED chips 4 and 5 are excited to produce the desired color light by using fluorescent glue 9. The insulating bracket 1 and fluorescent glue 9 together form the insulating portion of the lamp bead, protecting the internal LED chips.

[0026] According to different LED chip mounting methods, the connection between the LED chip and the electrode plate is as follows:

[0027] Taking the example of both the first LED chip 4 and the second LED chip 5 being upright chips, the side of the first LED chip 4 close to the first electrode plate 2 is fixed to the first electrode plate 2 via an insulating bonding adhesive. The positive and negative electrodes of the first LED chip 4 are both located on the side of the chip away from the first electrode plate 2. The positive electrode of the first LED chip 4 is connected to the first electrode plate 2 via a wire 10, and the negative electrode of the first LED chip 4 is connected to the second electrode plate 3 via a wire 10. The side of the second LED chip 5 close to the first electrode plate 2 is fixed to the first electrode plate 2 via an insulating bonding adhesive. The positive and negative electrodes of the second LED chip 5 are both located on the side of the chip away from the first electrode plate 2. The positive electrode of the second LED chip 5 is connected to the second electrode plate 3 via a wire 10, and the negative electrode of the second LED chip 5 is connected to the first electrode plate 2 via a wire 10.

[0028] Taking the example of flip-chips for both the first LED chip 4 and the second LED chip 5, the first LED chip 4 is a flip-chip, with the positive electrode of the first LED chip 4 disposed on the side of the chip close to the first electrode plate 2, and connected to the first electrode plate 2 via a conductive bonding adhesive. The negative electrode of the first LED chip 4 is disposed on the side of the chip away from the first electrode plate 2, and connected to the second electrode plate 3 via a wire 10. The second LED chip 5 is a flip-chip, with the negative electrode of the second LED chip 5 disposed on the side of the chip close to the first electrode plate 2, and connected to the first electrode plate 2 via a conductive bonding adhesive. The positive electrode of the second LED chip 5 is disposed on the side of the chip away from the first electrode plate 2, and connected to the second electrode plate 3 via a wire 10.

[0029] Exemplarily, the first LED chip 4 and the second LED chip 5 are symmetrically arranged at the center of the dam 6 to ensure that the light source is located at the center of the lamp bead.

[0030] Illustratively, the area enclosed by the dam 6 is in the shape of an inverted truncated cone, so as to focus light and improve lighting efficiency.

[0031] Exemplarily, the insulating bracket 1 is provided with a heat conduction hole on a side away from the dam 6, and the heat conduction hole is filled with thermal conductive glue 11. The thermal conductive glue 11 is in contact with the first electrode plate 2 so that the heat generated by the LED chip during operation can be quickly discharged outward, further extending the service life of the lamp bead.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A stepless monochrome LED lamp bead, characterized in that: The invention comprises an insulating support, a first electrode plate, a second electrode plate, a first LED chip, and a second LED chip; the first electrode plate and the second electrode plate are arranged at intervals on the same horizontal plane and are covered by the insulating support; the insulating support forms a dam on the upper surfaces of the first electrode plate and the second electrode plate, and the plate surfaces of the first electrode plate and the second electrode plate are partially exposed in the area enclosed by the dam; the first electrode plate has a first electrode pin extending along the side of the insulating support on one side of the insulating support; the second electrode plate has a second electrode pin extending along the side of the insulating support on the other side of the insulating support; the first LED chip and the second LED chip are mounted on the first electrode plate in the area enclosed by the dam at intervals; the positive electrode of the first LED chip is connected to the first electrode plate, and the negative electrode of the first LED chip is connected to the second electrode plate; the positive electrode of the second LED chip is connected to the second electrode plate, and the negative electrode of the second LED chip is connected to the first electrode plate; the area enclosed by the dam is filled with fluorescent glue, and the fluorescent glue covers the first electrode plate, the second electrode plate, the first LED chip, and the second LED chip.

2. The stepless single-color LED lamp bead according to claim 1, characterized in that: The first LED chip is a front-mounted chip, and the side of the first LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding glue. The positive and negative poles of the first LED chip are both arranged on the side of the chip away from the first electrode plate. The positive pole of the first LED chip is connected to the first electrode plate through a wire, and the negative pole of the first LED chip is connected to the second electrode plate through a wire.

3. The stepless single-color LED lamp bead according to claim 1, characterized in that: The second LED chip is a front-mounted chip, and the side of the second LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding glue. The positive and negative poles of the second LED chip are both arranged on the side of the chip away from the first electrode plate. The positive pole of the second LED chip is connected to the second electrode plate through a wire, and the negative pole of the second LED chip is connected to the first electrode plate through a wire.

4. The stepless single-color LED lamp bead according to claim 1, characterized in that: The first LED chip is a flip chip, the positive electrode of the first LED chip is arranged on the side of the chip close to the first electrode plate, the positive electrode of the first LED chip is connected to the first electrode plate through a conductive bonding glue, the negative electrode of the first LED chip is arranged on the side of the chip away from the first electrode plate, and the negative electrode of the first LED chip is connected to the second electrode plate through a wire.

5. The stepless single-color LED lamp bead according to claim 1, characterized in that: The second LED chip is a flip chip, the cathode of the second LED chip is arranged on the side of the chip close to the first electrode plate, the cathode of the second LED chip is connected to the first electrode plate through a conductive bonding glue, the anode of the second LED chip is arranged on the side of the chip away from the first electrode plate, and the anode of the second LED chip is connected to the second electrode plate through a wire.

6. The stepless single-color LED lamp bead according to claim 1, characterized in that: The first electrode plate and the second electrode plate are both copper plates.

7. The stepless single-color LED lamp bead according to claim 1, characterized in that: The first LED chip and the second LED chip are symmetrically arranged at the center of the dam.

8. The stepless single-color LED lamp bead according to claim 1, characterized in that: The area enclosed by the dam is in the shape of an inverted truncated cone.

9. The stepless single-color LED lamp bead according to claim 1, characterized in that: The insulating bracket is provided with a heat conduction hole on a side away from the dam, and the heat conduction hole is filled with heat conductive glue.

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