220V rectifier-bridge-free electrodeless lamp strip

Abstract

The 220V rectifier-bridge-free electrodeless lamp strip comprises a long-strip-shaped flexible substrate and a plurality of lamp beads arranged in the length direction of the flexible substrate, and each 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 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. According to the invention, the device can work under forward current and reverse current.

Description

Technical Field

[0001] The invention relates to the technical field of LED lighting, and in particular to a 220V rectifier-free electrodeless lamp strip. Background Art

[0002] LED (Light Emitting Diode) light strips are a popular product in modern lighting technology. They are widely used in home, commercial, architectural decoration and stage lighting due to their energy saving, environmental protection, long life and easy custom shapes. LED light strips are usually composed of a series of closely arranged small LED beads, which are encapsulated on a soft substrate such as polycarbonate (PC) or polyurethane (PU), making them highly flexible and bendable.

[0003] The working principle of LED light strips is based on the luminous characteristics of LED lamp beads. The core of LED lamp beads is a light-emitting diode (LED for short) composed of P-type and N-type semiconductor materials. When current passes through, electrons and holes recombine near the PN junction and release energy in the form of photons, thereby emitting light. LED has unidirectional conductivity, which can only be turned on (powered on) in one direction, and it is necessary to distinguish the positive and negative ends of the connected power supply. However, due to the unidirectional conductivity of LED, LED lamp beads have some shortcomings in practical applications, especially in AC circuits, where AC driving is difficult. This is because the current direction of AC changes periodically, and LED lamp beads only allow current to flow in one direction, which requires the use of a rectifier bridge circuit to convert AC into DC, thereby increasing the cost of circuit design; in addition, in the process of mounting LED lamp beads, it is also necessary to identify the polarity of the LED lamp beads corresponding to the positive and negative ends of the circuit, so it is necessary to set up a polarity identification process and corresponding equipment, which increases production costs and reduces production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a 220V non-rectifier bridge electrodeless light strip which does not need to be connected to a rectifier bridge and can operate under forward current and reverse current.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A 220V rectifier-free electrodeless lamp strip, comprising a long flexible substrate and a plurality of lamp beads arranged along the length direction of the flexible substrate, wherein the front side of the flexible substrate is printed with two first power lines and a second power line arranged in parallel and extending along the length direction of the flexible substrate, and a plurality of component lines connected in parallel between the first power line and the second power line; the first power line and the second power line are respectively provided with wiring pads at both ends of the flexible substrate; each of the component lines is provided with a plurality of lamp bead pads which are arranged at equal intervals along the length direction of the flexible substrate and can be connected in series with the lamp beads, and the lamp beads are mounted on the lamp bead pads; the front side of the flexible substrate except for the lamp beads and the wiring pads is coated with solder resist ink; the lamp beads comprise an insulating bracket, 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 bracket, An insulating bracket forms a dam on the upper surfaces of the first electrode plate and the second electrode plate, and part of the plate surfaces of the first electrode plate and the second electrode plate are exposed in the area surrounded by the dam; a first electrode pin welded to the lamp bead pad extends from the first electrode plate on one side of the insulating bracket; a second electrode pin welded to the lamp bead pad extends from the second electrode plate on the other side of the insulating bracket; the first LED chip and the second LED chip are mounted on the first electrode plate in the area surrounded 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; fluorescent glue is filled in the area surrounded by the dam, and the fluorescent glue covers the first electrode plate, the second electrode plate, the first LED chip and the second LED chip.

[0007] As a preferred solution of the present invention, the rated voltage of the lamp beads is 18V, and the number of lamp beads on each component circuit is 12.

[0008] As a preferred solution of the present invention, a resistor is connected in series on each of the component lines.

[0009] As a preferred embodiment of the present invention, the first LED chip is a front-mounted chip, and a side of the first LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding adhesive, the positive and negative electrodes of the first LED chip are both arranged on a side of the chip away from the first electrode plate, the positive electrode of the first LED chip is connected to the first electrode plate through a wire, and the negative electrode of the first LED chip is connected to the second electrode plate through a wire.

[0010] As a preferred embodiment 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 adhesive, the positive and negative electrodes of the second LED chip are both arranged on the side of the chip away from the first electrode plate, the positive electrode of the second LED chip is connected to the second electrode plate through a wire, and the negative electrode of the second LED chip is connected to the first electrode plate through a wire.

[0011] As a preferred embodiment of the present invention, the first LED chip is a flip chip, the positive electrode of the first LED chip is arranged on a 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 adhesive, the negative electrode of the first LED chip is arranged on a 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.

[0012] As a preferred embodiment of the present invention, the second LED chip is a flip chip, the cathode of the second LED chip is arranged on a side of the chip close to the first electrode plate, the cathode of the second LED chip is connected to the first electrode plate via a conductive bonding adhesive, the anode of the second LED chip is arranged on a side of the chip away from the first electrode plate, the anode of the second LED chip is connected to the second electrode plate via a wire.

[0013] 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.

[0014] As a preferred embodiment of the present invention, the area enclosed by the dam is in the shape of an inverted truncated cone.

[0015] 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.

[0016] The 220V rectifier-free electrodeless light strip provided by the present invention has the following beneficial effects compared with the prior art:

[0017] When in use, the two wiring pads at one end of the flexible substrate are respectively connected to household AC power, and the current passes through the wiring pads through the power supply circuit and the component circuit in turn to conduct all the lamp beads; since each lamp bead is mounted with LED chips of opposite polarity, when the lamp bead is supplied with forward current, the first LED chip lights up and the second LED chip goes out, and when the lamp bead is supplied with reverse current, the first LED chip goes out and the second LED chip lights up. Therefore, no matter whether the lamp bead is energized in the forward direction or in the reverse direction, the lamp bead can be in the lit state; at the same time, since the lamp bead is non-polar, 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 and the second LED chip 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. Therefore, through innovative lamp bead design, the light strip can be directly connected to the AC power supply without the need for an additional rectifier circuit. This not only simplifies the structure of the light strip and reduces manufacturing costs, but also improves the product's market competitiveness and user convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the structure of a 220V non-rectifier bridge electrodeless light strip provided by an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a flexible substrate in an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the lamp bead in an embodiment of the present invention;

[0022] Figure 4 It is Figure 3 A cross-sectional view taken along line AA of the structure shown.

[0023] Markings in the figure:

[0024] Flexible substrate 1; first power supply circuit 11; second power supply circuit 12; component circuit 13; wiring pad 14; lamp bead pad 15; lamp bead 2; insulating bracket 21; first electrode plate 22; second electrode plate 23; first LED chip 24; second LED chip 25; dam 26; first electrode pin 27; second electrode pin 28; fluorescent glue 29; wire 210; thermal conductive glue 211. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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. 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, which are only used to distinguish the same type of information 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.

[0027] like Figures 1 to 4As shown, a preferred embodiment of the present invention provides a 220V rectifier-free electrodeless light strip, which includes a long flexible substrate 1 and a plurality of lamp beads 2 arranged along the length direction of the flexible substrate 1, and the front of the flexible substrate 1 is printed with two first power lines 11 and a second power line 12 arranged in parallel and extending along the length direction of the flexible substrate 1, and a plurality of component lines 13 connected in parallel between the first power line 11 and the second power line 12; the first power line 11 and the second power line 12 are respectively provided with wiring pads 14 at both ends of the flexible substrate 1; each of the component lines 13 is connected to the first power line 11 and the second power line 12 in parallel ... The circuit 13 is provided with a plurality of lamp bead pads 15 which are arranged equidistantly along the length direction of the flexible substrate 1 and can be connected in series with the lamp beads 2 (each lamp bead 2 is connected to two opposite lamp bead pads 15), and the lamp bead 2 is mounted on the lamp bead pads 15; the front side of the flexible substrate 1 except for the lamp bead and the wiring pads 14 is coated with solder resist ink; the lamp bead 2 includes an insulating bracket 21, a first electrode plate 22, a second electrode plate 23, a first LED chip 24 and a second LED chip 25; the first electrode plate 22 and the second electrode plate 23 are arranged on the same horizontal plane and separated by the insulating The insulating bracket 21 is covered, and the insulating bracket 21 forms a dam 26 on the upper surface of the first electrode plate 22 and the second electrode plate 23, and the first electrode plate 22 and the second electrode plate 23 are partially exposed in the area surrounded by the dam 26; the first electrode plate 22 has a first electrode pin 27 welded to the lamp bead pad 15 extending from one side of the insulating bracket 21; the second electrode plate 23 has a second electrode pin 28 welded to the lamp bead pad 15 extending from the other side of the insulating bracket 21; the first LED chip 24 and the second LED chip 25 are mounted on the On the first electrode plate 22 within the area surrounded by the dam 26; the positive electrode of the first LED chip 24 is connected to the first electrode plate 22, and the negative electrode of the first LED chip 24 is connected to the second electrode plate 23; the positive electrode of the second LED chip 25 is connected to the second electrode plate 23, and the negative electrode of the second LED chip 25 is connected to the first electrode plate 22; the area surrounded by the dam 26 is filled with fluorescent glue 29, and the fluorescent glue 29 covers the first electrode plate 22, the second electrode plate 23, the first LED chip 24 and the second LED chip 25.

[0028] According to the 220V rectifier-free electrodeless lamp strip of the present invention, when in use, the two wiring pads 14 at one end of the flexible substrate 1 are respectively connected to household AC power, and the current passes through the wiring pads 14 through the power supply line and the component line 13 to turn on all the lamp beads 2; since LED chips with opposite polarities are mounted in each lamp bead, when the lamp bead is supplied with a forward current, the first LED chip 24 is lit and the second LED chip 25 is extinguished, and when the lamp bead is supplied with a reverse current, the first LED chip 24 is extinguished and the second LED chip 25 is lit, so no matter whether the lamp bead is energized in the forward direction or in 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 24 and the second LED chip 25 can be alternately lit, and the life of the lamp bead is twice that of a traditional lamp bead with a single LED chip built in. Therefore, through innovative lamp bead design, the light strip can be directly connected to the AC power supply without the need for an additional rectifier circuit. This not only simplifies the structure of the light strip and reduces manufacturing costs, but also improves the product's market competitiveness and user convenience.

[0029] It should be noted that the first electrode plate 22 and the second electrode plate 23 are both copper plates, and the first electrode plate 22 and the second electrode plate 23 extend from both sides of the insulating bracket 21 to form electrode pins extending along the side of the insulating bracket 21, so as to facilitate soldering the lamp bead to the circuit through solder paste. The first LED chip 24 and the second LED chip 25 are matched with the fluorescent glue 29 to excite the required color light. The insulating bracket 21 and the fluorescent glue 29 together constitute the insulating part of the lamp bead to protect the internal LED chip.

[0030] For example, in order to adapt to normal operation under 220V voltage, the rated voltage of the lamp bead 2 is 18V, and the number of lamp beads 2 on each component line 13 is 12. Furthermore, a resistor 3 is connected in series on each component line 13 to play a role of voltage division, ensuring that the voltage across the lamp bead 2 is not too high, limiting the current passing through the lamp bead 2, and preventing the lamp bead from being damaged by excessive current.

[0031] According to different LED chip mounting methods, the connection between the LED chip and the electrode plate is as follows:

[0032] Taking the example that both the first LED chip 24 and the second LED chip 25 are upright chips, the side of the first LED chip 24 close to the first electrode plate 22 is fixed to the first electrode plate 22 by an insulating bonding adhesive, the positive and negative electrodes of the first LED chip 24 are both arranged on the side of the chip away from the first electrode plate 22, the positive electrode of the first LED chip 24 is connected to the first electrode plate 22 by a wire 210, and the negative electrode of the first LED chip 24 is connected to the second electrode plate 23 by a wire 210. The side of the second LED chip 25 close to the first electrode plate 22 is fixed to the first electrode plate 22 by an insulating bonding adhesive, the positive and negative electrodes of the second LED chip 25 are both arranged on the side of the chip away from the first electrode plate 22, the positive electrode of the second LED chip 25 is connected to the second electrode plate 23 by a wire 210, and the negative electrode of the second LED chip 25 is connected to the first electrode plate 22 by a wire 210.

[0033] Taking the example that both the first LED chip 24 and the second LED chip 25 are flip-chip, the first LED chip 24 is a flip-chip, the positive electrode of the first LED chip 24 is arranged on the side of the chip close to the first electrode plate 22, the positive electrode of the first LED chip 24 is connected to the first electrode plate 22 through a conductive bonding adhesive, the negative electrode of the first LED chip 24 is arranged on the side of the chip away from the first electrode plate 22, and the negative electrode of the first LED chip 24 is connected to the second electrode plate 23 through a wire 210. The second LED chip 25 is a flip-chip, the negative electrode of the second LED chip 25 is arranged on the side of the chip close to the first electrode plate 22, the negative electrode of the second LED chip 25 is connected to the first electrode plate 22 through a conductive bonding adhesive, the positive electrode of the second LED chip 25 is arranged on the side of the chip away from the first electrode plate 22, and the positive electrode of the second LED chip 25 is connected to the second electrode plate 23 through a wire 210.

[0034] Exemplarily, the first LED chip 24 and the second LED chip 25 are symmetrically arranged at the center of the dam 26 to ensure that the light source is located at the center of the lamp bead.

[0035] Exemplarily, the area enclosed by the dam 26 is in the shape of an inverted truncated cone, so as to focus light and improve lighting efficiency.

[0036] Exemplarily, the insulating bracket 21 is provided with a heat conduction hole on a side away from the dam 26, and the heat conduction hole is filled with thermal conductive glue 211. The thermal conductive glue 211 is in contact with the first electrode plate 22, so that the heat generated by the LED chip during operation can be quickly discharged to the outside, further extending the service life of the lamp bead.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] 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 substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A 220V non-rectifier bridge electrodeless light strip, characterized in that: The invention comprises a long flexible substrate and a plurality of lamp beads arranged along the length direction of the flexible substrate, wherein the front side of the flexible substrate is printed with two first power supply lines and a second power supply line arranged in parallel and extending along the length direction of the flexible substrate, and a plurality of component lines connected in parallel between the first power supply line and the second power supply line; The first power supply circuit and the second power supply circuit are respectively provided with connection pads at both ends of the flexible substrate; each of the component circuits is provided with a plurality of lamp bead pads which are arranged at equal intervals along the length direction of the flexible substrate and can be connected in series with the lamp beads, and the lamp beads are mounted on the lamp bead pads; the front side of the flexible substrate except for the lamp beads and the connection pads is coated with solder resist ink; The 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 part of the plate surface of the first electrode plate and the second electrode plate is exposed in the area surrounded by the dam; the first electrode plate extends a first electrode pin welded to the lamp bead pad on one side of the insulating support; the second electrode plate extends a second electrode pin welded to the lamp bead pad 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 surrounded 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 surrounded 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 220V rectifier-free electrodeless light strip according to claim 1, characterized in that: The rated voltage of the lamp beads is 18V, and the number of lamp beads on each component circuit is 12.

3. The 220V rectifier-free electrodeless light strip according to claim 2, characterized in that: A resistor is connected in series to each of the component lines.

4. The 220V rectifier-free electrodeless light strip according to claim 1, characterized in that: The first LED chip is a front-mounted chip, and a side of the first LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding adhesive. The positive and negative electrodes of the first LED chip are both arranged on a side of the chip away from the first electrode plate. The positive electrode of the first LED chip is connected to the first electrode plate through a wire, and the negative electrode of the first LED chip is connected to the second electrode plate through a wire.

5. The 220V rectifier-free electrodeless light strip according to claim 1, characterized in that: The second LED chip is a front-mounted chip, and a side of the second LED chip close to the first electrode plate is fixed to the first electrode plate by an insulating bonding adhesive. The positive and negative electrodes of the second LED chip are both arranged on a side of the chip away from the first electrode plate. The positive electrode of the second LED chip is connected to the second electrode plate through a wire, and the negative electrode of the second LED chip is connected to the first electrode plate through a wire.

6. The 220V rectifier-free electrodeless light strip 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 adhesive, 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.

7. The 220V rectifier-free electrodeless light strip 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 a side of the chip close to the first electrode plate, the cathode of the second LED chip is connected to the first electrode plate via a conductive bonding adhesive, the anode of the second LED chip is arranged on a side of the chip away from the first electrode plate, the anode of the second LED chip is connected to the second electrode plate via a wire.

8. The 220V rectifier-free electrodeless light strip 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.

9. The 220V rectifier-free electrodeless light strip according to claim 1, characterized in that: The area enclosed by the dam is in the shape of an inverted truncated cone.

10. The 220V rectifier-free electrodeless light strip 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 conduction glue.

Images