KR101488514B1 - The LED lighting apparatus using circuit for intercepting electromagnetic interference - Google Patents

Abstract

The present invention relates to an LED lighting apparatus applied with an electromagnetic blocking circuit, and more specifically, to an LED lighting apparatus for collecting an electromagnetic wave by a radiation plate, converting the electromagnetic wave into a surface current; and discharging the surface current through grounding. The present invention can efficiently block the electromagnetic wave generated by the LED lighting apparatus, a converter, or other components by using the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LED lighting apparatus using a low-frequency and high-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LED lighting device employing an electromagnetic wave blocking circuit, and more particularly, to an LED lighting device that collects electromagnetic waves to convert into surface current and discharges the ground current through a ground.

2. Description of the Related Art Generally, a light emitting diode (LED) is a device in which electrons and holes meet at a PN junction by applying a current and emits light. Generally, a package structure is used in which an LED chip is mounted. It is called 'LED package'. The LED package is generally mounted on a printed circuit board (hereinafter, referred to as 'PCB'), and is configured to receive a current from an electrode formed on the printed circuit board and operate to emit light. In the LED package, the heat generated from the LED chip directly affects the light emitting performance and lifetime of the LED package. This is because the heat generated in the LED chip causes dislocation and mismatch in the crystal structure of the LED chip when the LED chip stays on the LED chip for a long time.

Accordingly, conventionally, techniques for promoting heat emission from the LED chip have been proposed. Typically, instead of mounting the LED chip on a lead frame, a heat sink slug made of a metal material having a high thermal conductivity is inserted into the package body, and an LED chip is mounted on the heat dissipating slug LED package. In such a conventional LED package, the heat dissipating slug is arranged to be in contact with the PCB, and the heat of the LED chip is transferred to the PCB through the heat dissipating slug. In a conventional LED heat dissipating device, an LED package is arrayed on a metal PCB, and a heat sink is installed under the metal PCB.

Currently, metal aluminum is used for the heat dissipating member for the LED lighting housing, and since it has a very low thermal emissivity, it is used by imparting heat emissivity by anodizing, painting, or finishing. Therefore, the problem of deterioration in productivity and high cost is a problem, and the demand for replacing metal aluminum with an injection molded article using a thermoplastic resin excellent in productivity has been strengthened. However, in contrast to metallic aluminum, thermoplastic resin has very low thermal conductivity and therefore low heat dissipation. Therefore, it can not be used without being thermally conductive for use in a heat radiation member for an LED lighting housing.

As a method of imparting thermal conductivity to a thermoplastic resin, a method of compounding a high thermal conductive filler has been proposed. However, the LED lighting housing is required to have flame retardancy, insulation, and good molding processability in addition to heat dissipation, and resinization of the LED lighting housing has not yet been achieved because there is no thermoplastic resin satisfying all of these. In recent years, weight reduction by resinization and appearance of whiteness are also demanded.

Korean Patent Publication No. 1383975

2. Description of the Related Art [0002] Recently, LED devices have been attracting attention as a light source for various lighting devices. The LED device exhibits very excellent characteristics such as a very small size as compared with the conventional illumination light source, low power consumption, long lifetime, and high reaction speed. In addition, it does not emit harmful waves such as ultraviolet rays, and is environmentally friendly because it does not use mercury or other discharge gas. However, in the lighting device using the LED device, since an electronic circuit is built in the power module, electromagnetic waves of high frequency and high output are emitted to the outside, which can adversely affect the user's body. Specifically, when the human body is exposed to electromagnetic waves, it can result in dermatitis, headache, chronic fatigue, premature birth, and birth defects. Therefore, a device and a blocking technique for effectively blocking electromagnetic waves are required.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an LED lighting device employing an electromagnetic wave shielding circuit, which comprises a plurality of LED lights, a flexible circuit board on which the plurality of LED lights are seated, A circuit board on which circuit components are mounted, a power supply unit for supplying power, and a power supply unit for supplying power to the respective components Wherein the heat radiating plate is an antenna for collecting electromagnetic waves, and includes an electromagnetic wave blocking circuit for converting a collected electromagnetic wave into a surface current and discharging the ground current through a ground.

According to another aspect of the present invention, there is provided a method for shielding electromagnetic waves from an LED lighting apparatus, wherein a surface current is generated on the surface of a heat sink by absorbed electromagnetic waves when the heat sink absorbs electromagnetic waves first, The present invention provides an electromagnetic wave shielding method of an LED lighting device capable of shielding an electromagnetic wave by being discharged through a ground after the converted direct current is converted into a current and an electromagnetic wave of a high frequency band (1000 Hz or more) as well as a low frequency band Blocking.

It is possible to efficiently block the electromagnetic waves generated from the LED light, the converter, or other components by first applying the LED lighting device and the electromagnetic wave shielding method using the electromagnetic wave blocking circuit of the present invention. Particularly, the present invention provides electromagnetic wave interception in a high frequency band (1000 Hz or more) by constructing a high frequency processing section for processing low frequency noise as well as noise in a high frequency range by the rectifying section and the grounding section.

Secondly, the heat sink of the present invention not only functions to conduct and diffuse heat but also functions as an antenna for collecting electromagnetic waves, so that there is no need to add additional means for collecting and absorbing electromagnetic waves, Space-efficient. Particularly, since a relatively low installation cost is required, a substitute effect can be expected for an expensive electromagnetic wave rejection filter (CMEF).

Thirdly, the heat radiating plate of the present invention has a guide part for fixing the flexible circuit board, an electromagnetic wave interrupting circuit module, a circuit board, and a storage space for arranging various wires, thereby securing stability of the LED light, .

1 is a block diagram showing basic components of an LED lighting device.
2 is a circuit diagram of Embodiment 1 of the electromagnetic wave interrupting circuit of the present invention.
2 is a circuit diagram of an electromagnetic wave interrupting circuit according to a second embodiment of the present invention.
2 is a circuit diagram of a third embodiment of the electromagnetic wave interrupting circuit of the present invention.
5 is a flow chart of the electromagnetic wave shielding method of the LED lighting device of the present invention.
Fig. 6 is a diagram showing an actual example of manufacturing the electromagnetic wave interrupting circuit module of the present invention as a unit with a circuit board.
FIG. 7 is an actual view showing a circuit diagram and a spring fixed to a rear surface of a flexible circuit board to which an LED bulb lamp is fixed according to another embodiment of the present invention. FIG.
Fig. 8 is a measurement graph when the electromagnetic wave interrupting circuit of the present invention is not applied.
Fig. 9 is a measurement graph when the electromagnetic wave interrupting circuit according to the first embodiment of the present invention is applied.
10 is a measurement graph when the electromagnetic wave blocking circuit according to the second embodiment of the present invention is applied.
11 is an exemplary diagram showing an automatic operation module to which an AC relay is applied to the electromagnetic wave interrupting circuit of the present invention.
12 is an illustration showing an automatic operation module in which four MOSFETs are applied to the electromagnetic wave blocking circuit of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LED (Light Emitting Diode) lighting apparatus employing an electromagnetic wave cutoff circuit, and more particularly to an LED lighting apparatus that collects electromagnetic waves and converts them into surface currents, will be. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing basic components of an LED lighting device. The LED lighting device 10 includes a flexible circuit board 20 on which the plurality of LED lights 10 are mounted, A heat sink 30 for conducting and diffusing the heat generated in the converter 50 and the LED light 10 and the converter 50 for stably discharging the heat sink 10 to the heat sink 30, A circuit board 60 on which circuit components are mounted, and a power supply unit 70 for supplying power, and shows the electrical connection relationship of each component connected by the plurality of leads 80 and the like. The illuminator may be an LED fluorescent lamp, an LED bulb (light bulb), a down light factory, a flat panel or the like, or a spot light, but is not limited thereto. In addition, it may include an operation control module 46 for checking and controlling whether or not the electromagnetic wave interception circuit module 40 is operated as needed. The operation control module 46 may include a separate lamp for confirming the operation and a switch for turning on / off the electromagnetic interception circuit module 40.

The heat radiating plate 30 of the present invention functions not only as a heat radiating plate but also as an antenna for collecting electromagnetic waves, and is preferably made of aluminum as a conductive material. The electromagnetic waves collected by the heat sink 30 are converted into a surface current in the form of an alternating current by the free electron oscillation of the surface of the conductive aluminum, which flows to the electromagnetic wave interception circuit module 40. At this time, the heat sink 30 includes a guide portion 31 for fixing the flexible circuit board 20 on which the plurality of LED lights 10 are mounted, the electromagnetic wave interception circuit module 40, a circuit board 60 and a storage space (not shown) for storing the lead wires 80. [ Also, the heat sink 30 can be applied to various forms including a concavo-convex shape including a concave portion and a convex portion in order to increase the surface area and increase the conversion efficiency.

The heat sink 30 of the present invention is a heat sink 30 disposed over the entire back surface of the flexible circuit board 20 and collects and converts the electromagnetic wave generated from the LED light 10 into surface current, The electromagnetic wave generated from the converter 50 is collected and converted into a surface current. The collected electromagnetic waves are converted into a surface current, which is an alternating current, and are flowed to the electromagnetic wave interrupting circuit module 40. In addition, it is also possible to provide a light cover having a semitransparent material to cover the front portion of the LED light 10.

The heat radiating plate for conducting and diffusing the heat generated by the LED light or converter is preferably a metallic conductor such as aluminum, but may be applied to a nonconductive material having thermal conductivity. In this case, a conductive coating layer is installed inside or on the surface of the heat sink to collect electromagnetic waves.

The alternating current is a surface current generated by the electromagnetic wave contacting the conductive object, and the surface current can flow along the surface of the conductive object. For example, the alternating current may be a current that is generated by various electronic devices converted into a surface current and flows to the ground. Alternatively, the alternating current may be an electromagnetic wave generated by an electronic device inside or outside the building, Current.

Further, the present invention includes an electromagnetic wave blocking circuit module to rectify the surface current, which is the alternating current, into a direct current.

2 is a circuit diagram of the electromagnetic wave interrupting circuit module 40 according to the first embodiment of the present invention. The electromagnetic intercepting circuit module 40 includes an input unit 41 for receiving an AC current converted from the surface of the heat sink 30, A rectifying section 42 which is converted into a current, and a ground providing section 43 which generates ground by a voltage input from the outside. This configuration limits the inrush current of the NTC, limits the surge by using a varistor, limits the input current voltage by using Ohm's law, adjusts the input voltage to almost zero in the rectifier circuit, So that the surface current of the electromagnetic wave is smoothly discharged through the ground through the mutual relation of the potentials. Through the above-described configuration, noise in a low frequency (less than 1000 Hz) section is eliminated.

In addition, the present invention further includes a high frequency processing unit 44 for reducing high frequency noise. The high frequency processing unit 44 consumes high frequency noise in the bead filter 441 and eliminates the high frequency noise through the varistor 442, Constant voltage is input to suppress unnecessary noise. In this case, the bead filter 441 may be a ferrite core. Thereafter, the noise is discarded through the LC filter (CFI-104M is used in the present application) to the heat sink 30, and the noise is collected through the input unit 41 and removed. On the other hand, when two lines are connected to the grounding unit 43, only one line may be connected and the other line may be constituted by the hold line 444 since high frequency may occur.

3 is a circuit diagram of a second embodiment of the electromagnetic wave interrupting circuit of the present invention. 3, an EMI filter is applied to the high-frequency processing unit 44. The EMI filter includes a decoupling capacitor 442, a pair of coils 446, and two capacitors 447 .

The bead filter 441 and the varistor 442 are the same as those in the first embodiment shown in FIG. 2, and a decoupling capacitor connected adjacent thereto preferably has a value between 0.1 uF and 1200 uF. In the case of the coil 446 provided adjacent to the decoupling capacitor 445, it is desirable to have a value between 0.3 uH to 50 mH for removing noise of kHz to MHz. The capacitor 447 provided at the rear of the coil 446 is for rejecting the high frequency noise to the heat sink 30. The values of the two capacitors 447 are equal to each other and have a value of 3000 pF to 100 nF. The EMI filter of the present invention having the numerical limitations described above has a higher efficiency for an EMI filter built in a conventional SMPS which is at a level that slightly exceeds a reference value or exceeds a reference value.

In the second embodiment shown in Fig. 3, the low-frequency noise removal is the same as the first embodiment shown in Fig.

Fig. 4 is a circuit diagram of an electromagnetic wave interrupting circuit according to a third embodiment of the present invention, which shows an electromagnetic interrupting circuit in which the interrupting circuit of the first embodiment is combined with the interrupting circuit of the second embodiment. This is because the blocking circuit of the first embodiment is different from the noise removing area for each frequency of the high-frequency processing unit 44 of the second embodiment, so that the two circuits are added in series, .

FIG. 5 is a flow chart showing a method of cutting off the electromagnetic wave of the LED lighting apparatus of the present invention. When the heat sink 30 absorbs electromagnetic waves, surface current is generated on the surface of the heat sink 30 by the absorbed electromagnetic waves,

The high-frequency region of the surface current, which is the alternating current, consumes high-frequency noise in the bead filter as heat and releases noise in the low-frequency region to the heat sink,

The low-frequency region of the surface current, which is the alternating current, is converted into a direct current by the rectifying section 42 of the electromagnetic intercepting circuit module 40, and then the converted direct current is discharged through the ground to block the electromagnetic wave. The ground may be at least one selected from an outlet ground, a neutral ground, a virtual ground, or a building ground.

That is, the present invention provides a method of manufacturing a semiconductor device, including: a step of absorbing electromagnetic waves by a heat radiating plate; A high frequency processing step; A low frequency region noise emission step; A low frequency region noise collection step; Converting the surface current, which is the alternating current, from a rectifying part of the electromagnetic wave interrupting circuit module to a direct current; And the converted DC current is discharged through the ground.

FIG. 6 is an actual embodiment of the present invention in which the electromagnetic wave interrupting circuit module 40 of the present invention is integrated with the circuit board 60 in an LED fluorescent lamp. The input section 41 shown in FIG. So that it can be directly contacted with the heat sink 30 when the heat sink 30 is slidably fixed. FIG. 7 is an actual view showing a circuit diagram and a spring fixed to a rear surface of a flexible circuit board to which an LED bulb (bulb) lamp is fixed, according to another embodiment of the present invention.

FIG. 8 is a graph of Ce test measurement when the electromagnetic interception circuit of the present invention is not applied, FIG. 9 is a graph of Ce test measurement when the electromagnetic interception circuit of the first embodiment of the present invention is applied, and FIG. 2 is a Ce test measurement graph when the electromagnetic wave interrupting circuit of Example 2 is applied. The uppermost line in each graph represents the reference value, the middle line represents the maximum value of the measured values, and the lower line represents the average value of the measured values.

As shown in the Ce test graph of FIG. 9 and FIG. 10, it can be seen that the electromagnetic wave is remarkably reduced as compared with the Ce test graph of FIG. 8 when the electromagnetic interference circuit of the present invention is applied.

11 and 12 show an embodiment in which an automatic operation module 45 is added to allow the electromagnetic interference circuit module 40 to be automatically operated irrespective of whether or not the user has connected the power in the proper direction . 11 shows an automatic operation module 45 to which an AC relay (DK-3S220VAC) 451 is applied, and FIG. 12 shows an automatic operation module 45 to which four MOSFETs (IRF 720) are applied. The automatic operation module 45 shown in FIGS. 11 and 12 automatically operates the electromagnetic wave interrupting circuit module 40 regardless of the polarity directional connection of the power source as described above, thereby enabling operation of a more reliable device do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes and modifications will be apparent to those skilled in the art. It is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

10. LED lighting
20. Flexible circuit board
30. Heat sink
31. Guide section
40. Electromagnetic Interference Circuit Module
41. Input unit
42. Rectifier
43. Grounding aid
44. High-
45. Automatic operation module
46. Operation control module
50. Converters
60. Circuit board
70. Power supply
80. Conductor

Claims (14)

In an LED lighting apparatus to which an electromagnetic wave blocking circuit is applied,
LED lighting;
A flexible circuit board on which the plurality of LED lights are mounted;
A heat sink provided over the entire back surface of the flexible circuit board on which the LED illumination is placed;
An electromagnetic wave blocking circuit module connected to the heat sink;
A converter for maintaining the constant voltage to discharge the LED light;
A circuit board on which circuit components are mounted;
A power supply for supplying power; And
Conductors that electrically connect each component;
And,
The heat sink is an antenna for collecting electromagnetic waves,

The electromagnetic wave blocking circuit module includes:
An input unit for receiving an AC current converted from a surface of the heat sink;
A rectifying part for converting an alternating current inputted to the input part into a direct current;
An input terminal for receiving a voltage input from the outside;
A ground providing unit for generating a ground with a voltage received from the input terminal; And
And a high-frequency processing unit (44) for processing noise in a high-frequency region.
The method according to claim 1,
The high-frequency processing unit 44
A bead filter 441 for dissipating high frequency noise as heat,
A varistor 442 for receiving a constant voltage and suppressing generation of unnecessary noise,
An LC filter 443 for discarding noise to the heat sink 30,
And an electromagnetic wave blocking circuit for applying the electromagnetic wave blocking circuit.
The method according to claim 1,
The high-frequency processing unit 44
A bead filter 441 for dissipating high frequency noise as heat,
A varistor 442 for receiving a constant voltage and suppressing generation of unnecessary noise,
An EMI filter 443 for removing high frequency noise;
And an electromagnetic wave blocking circuit for applying the electromagnetic wave blocking circuit.
The method according to claim 1,
The high-frequency processing unit 44
A bead filter 441 for dissipating high frequency noise as heat,
A varistor 442 for receiving a constant voltage and suppressing generation of unnecessary noise,
An LC filter 443 for discarding noise to the heat sink 30,
An EMI filter 443 for removing high frequency noise;
And an electromagnetic wave blocking circuit for applying the electromagnetic wave blocking circuit.
5. The method according to any one of claims 2 to 4,
The heat-
A guide unit for fixing the flexible circuit board on which the plurality of LED lights are mounted; And
An electromagnetic wave interrupting circuit module, a circuit board on which the circuit components are mounted, and a storage space for accommodating the conductive wires;
And an electromagnetic wave shielding circuit for applying the electromagnetic wave shielding circuit.
5. The method according to any one of claims 2 to 4,
Wherein the heat dissipation plate is installed over the entire back surface of the flexible circuit board, and collects electromagnetic waves generated from the LED illumination and converts the electromagnetic waves into a surface current.
5. The method according to any one of claims 2 to 4,
Wherein the heat dissipation plate is installed in a front portion of the converter, and collects electromagnetic waves generated from the converter and converts the electromagnetic waves to a surface current.
5. The method according to any one of claims 2 to 4,
Wherein the heat sink converts the collected electromagnetic waves into a surface current, which is an alternating current, and sends the converted surface current to an input portion of the electromagnetic wave blocking circuit module.
5. The method according to any one of claims 2 to 4,
Wherein the heat dissipation plate is made of aluminum and conducts and diffuses heat generated by the LED light or converter.
5. The method according to any one of claims 2 to 4,
Wherein the heat dissipation plate is made of a nonconductive material that conducts and diffuses heat generated from the LED light or converter and is provided with a conductive coating layer on the inside or the surface thereof.
5. The method according to any one of claims 2 to 4,
Wherein the heat dissipation plate has a concavo-convex shape including a concave portion and a convex portion.
5. The method according to any one of claims 2 to 4,
Wherein the converter is installed in a storage space of the heat sink.
5. The method according to any one of claims 2 to 4,
Wherein the converter is installed outside the heat sink.
5. The method according to any one of claims 2 to 4,
Wherein the LED illumination device is at least one selected from the group consisting of an LED fluorescent lamp, an LED bulb, a downlight factory, a flat panel lamp, and a spotlight.

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