CN213272543U

CN213272543U - Full-patch LED lamp panel

Info

Publication number: CN213272543U
Application number: CN202022490538.9U
Authority: CN
Inventors: 郑爱华; 蔡显彬; 赵俊洪
Original assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Current assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-05-25
Anticipated expiration: 2030-11-02

Abstract

The utility model provides a full paster LED lamp plate relates to LED lamp plate control technical field, can propagate the interfering signal of circuit to the substrate through distributed capacitance in order to solve present full paster LED lamp plate at the operation in-process, leads to EMI very poor problem. In order to solve the problems, the LED lamp panel comprises a circuit layer, a metal layer and an insulating layer positioned between the circuit layer and the metal layer, wherein the circuit layer comprises a rectifying and filtering circuit, a switching power supply circuit and an LED module, and the circuit layer further comprises a connecting medium; the signal input end of the rectification filter circuit is connected with a mains supply LN, the signal output end of the rectification filter circuit is connected with the LED module through a switching power supply circuit, one end of a connecting medium is connected with a stable area in a circuit layer, the stable area is the anode of the rectification filter circuit or the ground pole of a circuit board or the anode or the cathode of the LED module connected with a filter capacitor in parallel, and the other end of the connecting medium is connected with the metal layer. This LED lamp plate is with low costs, and interference immunity is strong.

Description

Full-patch LED lamp panel

Technical Field

The utility model relates to a LED lamp plate control technical field especially relates to a full paster LED lamp plate.

Background

The full-chip LED lamp panel usually adopts an aluminum substrate, and the aluminum substrate is a circuit layer (copper layer), an insulating layer and a metal aluminum layer from top to bottom in sequence. Since the metal aluminum layer and the circuit layer are isolated by the insulating layer, a distributed capacitance is formed between the metal aluminum layer and the circuit layer.

When an interference wire number exists in the circuit layer, the distributed capacitor can transmit the interference wire number to the metal aluminum layer, and the metal aluminum layer transmits an interference signal outwards, so that the EMI performance of the full-patch LED lamp is poor.

At present, the method for improving the electromagnetic interference of the LED lamp panel generally uses an EMI filter in a circuit of the LED lamp panel or adds a lightning protection component in the LED lamp panel, that is, adds an additional component to improve the problem of poor EMI performance.

Disclosure of Invention

In order to solve the problems in the background art, the utility model provides a full-patch LED lamp panel, which comprises a circuit layer, a metal layer and an insulating layer positioned between the circuit layer and the metal layer, wherein the circuit layer comprises a rectifying and filtering circuit, a switching power supply circuit and an LED module, and is characterized in that the circuit layer also comprises a connecting medium; the signal input end of the rectification filter circuit is connected with a mains supply LN, the signal output end of the rectification filter circuit is connected with the LED module through a switch power supply circuit, one end of the connecting medium is connected with a stable area in a circuit layer, the stable area is the anode of the rectification filter circuit or the ground pole of a circuit board or the anode of the LED module connected with the filter capacitor in parallel or the cathode of the LED module connected with the filter capacitor in parallel, and the other end of the connecting medium is connected with a metal layer.

Further, the rectifier filter circuit comprises a rectifier bridge BD1, a capacitor C1 and a capacitor C2, wherein the rectifier bridge BD1 comprises a positive terminal and a negative terminal; one end of the capacitor C1 is connected with the metal layer through a connecting medium.

Further, the positive terminal of the rectifier bridge BD1 is connected to the metal layer.

Further, the negative terminal of the rectifier bridge BD1 is connected to the metal layer.

Further, the switching power supply circuit comprises an energy storage inductor L2, a switching MOS transistor Q1 and a freewheeling diode D1; one end of the energy storage inductor L2 is connected with one end of the LED module, the other end of the energy storage inductor L2 is connected with one end of the switch MOS tube Q1 and the anode of the fly-wheel diode D1, the cathode of the fly-wheel diode D1 is connected with one end of the rectifying and filtering circuit and the other end of the LED module, and the other end of the switch MOS tube Q1 is grounded.

Further, the LED module comprises a filter capacitor C3 and a plurality of LED lamps; the LED lamps are connected in series according to the preset, one end of the filter capacitor C3 is connected with one end of the switching power supply circuit, the anodes of the LED lamps are connected in series, and the other end of the filter capacitor C3 is connected with the cathodes of the LED lamps in series and grounded.

Further, the anodes of the LED lamps after being connected in series are connected with the metal layer.

Further, the cathodes of the LED lamps after being connected in series are connected with the metal layer.

Further, the substrate of the metal layer is an aluminum substrate.

The utility model discloses have following advantage at least:

(1) through the connecting medium, the stabilizing unit in the circuit layer is connected and conducted with the substrate, so that the substrate obtains the characteristics of the stabilizing unit and the EMI is improved.

(2) This full paster LED lamp plate need not additionally increase components and parts, through the connection of the stable unit in the circuit layer and base plate, just can improve EMI, saves the cost and can reach fine anti-interference effect.

Drawings

Fig. 1 is a system structure diagram of the full-patch LED lamp panel.

Fig. 2 is a first schematic circuit connection diagram in the embodiment of the full-patch LED lamp panel.

Fig. 3 is a second schematic circuit connection diagram in the embodiment of the full-patch LED lamp panel.

Fig. 4 is a third schematic circuit connection diagram in the embodiment of the full-patch LED lamp panel.

Fig. 5 is a fourth schematic circuit connection diagram in the embodiment of the full-patch LED lamp panel.

Fig. 6 is a schematic cross-sectional view of a substrate.

In the figure, 100, copper skin layer; 200. an insulating layer.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Examples

The embodiment provides a full-chip LED lamp panel, as shown in fig. 1 to 6, which includes a circuit layer, a metal layer and an insulating layer 200 located therebetween, wherein the circuit layer includes a rectifying and filtering circuit, a switching power supply circuit and an LED module, and is characterized in that the circuit layer further includes a connecting medium; the signal input end of the rectification filter circuit is connected with a mains supply LN, the signal output end of the rectification filter circuit is connected with the LED module through a switch power supply circuit, one end of the connecting medium is connected with a stable area in a circuit layer, the stable area is the anode of the rectification filter circuit or the ground pole of a circuit board or the anode of the LED module connected with the filter capacitor in parallel or the cathode of the LED module connected with the filter capacitor in parallel, and the other end of the connecting medium is connected with a metal layer.

All elements on the PCB adopt full patches.

As shown in fig. 6, the metal layer is a metal substrate, the metal substrate in this application is an aluminum substrate, a glue film is used for insulating the insulating layer 200 between the copper layer 100 of the circuit layer and the metal substrate, i.e., the aluminum substrate, and at this time, the space between the copper layer 100 and the metal substrate is equivalent to a capacitor CR, and the voltage across the capacitor cannot suddenly change.

If the potential of the copper layer 100 is in a stable region, the voltage across the capacitor CR is stable and does not cause EMC problems.

However, the MOS transistor Q1 of the switching power supply circuit of the full-chip LED lamp panel generates voltage and current sudden change. When the switch is switched on, the voltage is suddenly reduced, and the current is suddenly increased; when the circuit is turned off, the voltage suddenly rises, and the current suddenly decreases; and periodically changed, so that the abrupt signal is transmitted to the metal substrate through the distributed capacitor CR. The whole metal substrate is like an antenna, and transmits the sudden change signal outwards, so that the EMI performance is poor.

In order to improve the EMI of the circuit, it is necessary to change the antenna characteristics of the metal substrate and connect the metal substrate to the stabilizing circuit so as to have the stabilizing circuit characteristics.

The stabilizing circuit in the application is a positive electrode stabilizing unit and a negative electrode stabilizing unit in the rectifying and filtering circuit, namely a V + end of a rectifying bridge BD1 and a V-end of a rectifying bridge BD1 in the rectifying and filtering circuit, a positive electrode and a negative electrode of capacitors at two ends of the LED lamp module and a ground wire on the circuit.

Further, the rectifying and filtering circuit comprises a rectifying and filtering circuit positive electrode stabilizing unit, a fuse device F1, a rectifying bridge BD1, a capacitor C1, an inductor L1 and a capacitor C2, wherein the rectifying bridge BD1 comprises a V + end and a V-end; the positive electrode stabilizing unit of the rectifying and filtering circuit is a V + end of a rectifying bridge BD1, and the V + end of the rectifying bridge BD1, one end of an inductor L1 and one end of a capacitor C1 are connected with the substrate through a connecting medium.

The rectification filter circuit: the input of a mains supply LN is connected with a rectifier filter circuit consisting of an inductor L1, an electrolytic capacitor C1 and a capacitor C2 through an F1 fuse element and a BD1 rectifier bridge.

Further, the rectifying and filtering circuit comprises a rectifying and filtering circuit cathode stabilizing unit, a fuse device F1, a rectifying bridge BD1, a capacitor C1, an inductor L1 and a capacitor C2, wherein the rectifying bridge BD1 comprises a V + end and a V-end; the negative electrode stabilizing unit of the rectifying and filtering circuit is a V-end of a rectifying bridge BD1, and the V-end of the rectifying bridge BD1 is grounded and connected with the substrate through a connecting medium.

The positive pole of the electrolytic capacitor C1 of the rectifying and smoothing circuit and the negative pole of the electrolytic capacitor C1 of the rectifying and smoothing circuit form a stable region.

The switching power supply circuit provided by the embodiment is a voltage reduction circuit and comprises an energy storage inductor L1, a switching MOS tube Q1, a freewheeling diode D1, a switching power supply chip and an electrolytic capacitor.

Because the switching power supply circuit realizes the output of the circuit by controlling the high-speed on and off processes of the switching MOS tube.

The high-speed switching circuit generates EMC characteristics, and in order not to disturb the outside, an internal absorption process of the circuit is adopted.

Further, the LED module comprises a filter capacitor C3 and a plurality of LED lamps; the LED lamps are connected in series according to the preset, one end of the filter capacitor C3 is connected with one end of the switching power supply circuit, the anodes of the LED lamps after being connected in series and one end of the connecting medium, and the other end of the filter capacitor C3 is grounded.

Further, the LED module comprises a filter capacitor C3 and a plurality of LED lamps; the LED lamps are connected in series according to the preset, one end of the filter capacitor C3 is connected with one end of the switching power supply circuit and the anodes of the LED lamps after the LED lamps are connected in series, and the other end of the filter capacitor C3 is connected with one end of the connecting medium and is grounded.

The + pole and the-pole of the filter capacitor at two ends of the LED are stable areas.

Further, the connecting medium is composed of a conductive adhesive tape and a connecting wire.

Further, the substrate is an aluminum substrate.

Through the full paster LED lamp plate that this embodiment provided, antenna characteristic through changing metal substrate is connected metal substrate and stabilizing circuit, makes it be stabilizing circuit characteristic, improves circuit EM. And the metal has natural shielding characteristic, and interference signals are transmitted to the metal substrate through the CR distributed capacitor formed by the metal substrate, and the transmitted interference model can be absorbed because the metal substrate is a stable circuit. And can shield the interference signal from transmitting outwards.

Therefore, the application provides a full paster LED lamp plate need not additionally increase components and parts, just can improve EMI through the substrate. The cost is saved, and the photoelectric integrated design of the LED lamp panel is facilitated.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the appended claims.

Claims

1. A full-chip LED lamp panel comprises a circuit layer, a metal layer and an insulating layer positioned between the circuit layer and the metal layer, wherein the circuit layer comprises a rectifying and filtering circuit, a switching power supply circuit and an LED module; the signal input end of the rectification filter circuit is connected with a mains supply LN, the signal output end of the rectification filter circuit is connected with the LED module through a switch power supply circuit, one end of the connecting medium is connected with a stable area in a circuit layer, the stable area is the anode of the rectification filter circuit or the ground pole of a circuit board or the anode of the LED module connected with the filter capacitor in parallel or the cathode of the LED module connected with the filter capacitor in parallel, and the other end of the connecting medium is connected with a metal layer.

2. The full-chip LED lamp panel according to claim 1, wherein the rectifier filter circuit comprises a rectifier bridge BD1, a capacitor C1 and a capacitor C2, wherein the rectifier bridge BD1 comprises a positive terminal and a negative terminal; one end of the capacitor C1 is connected with the metal layer through a connecting medium.

3. The full-chip LED lamp panel according to claim 2, wherein the positive terminal of the rectifier bridge BD1 is connected to the metal layer.

4. The full-chip LED lamp panel according to claim 2, wherein the negative terminal of the rectifier bridge BD1 is connected to the metal layer.

5. The full-chip LED lamp panel according to claim 1, wherein the switching power supply circuit comprises an energy storage inductor L2, a switching MOS transistor Q1, a freewheeling diode D1; one end of the energy storage inductor L2 is connected with one end of the LED module, the other end of the energy storage inductor L2 is connected with one end of the switch MOS tube Q1 and the anode of the fly-wheel diode D1, the cathode of the fly-wheel diode D1 is connected with one end of the rectifying and filtering circuit and the other end of the LED module, and the other end of the switch MOS tube Q1 is grounded.

6. The full-patch LED lamp panel according to claim 1, wherein the LED module comprises a filter capacitor C3 and a plurality of LED lamps; the LED lamps are connected in series according to the preset, one end of the filter capacitor C3 is connected with one end of the switching power supply circuit, the anodes of the LED lamps are connected in series, and the other end of the filter capacitor C3 is connected with the cathodes of the LED lamps in series and grounded.

7. The full-chip LED lamp panel according to claim 6, wherein the anodes of the plurality of LED lamps connected in series are connected to the metal layer.

8. The full-patch LED lamp panel according to claim 6, wherein the cathodes of the plurality of LED lamps connected in series are connected with the metal layer.

9. The full-chip LED lamp panel according to claim 1, wherein the base material of the metal layer is an aluminum substrate.