KR20070076604A - A wireless electric light panel and emitting light device using small receiving module for receiving electro-magnetic wave - Google Patents

Abstract

A wireless electric signboard and a wireless light emitting device using a small receiving module for receiving an electromagnetic wave are provided to keep the electric signboard transparent by excluding a power supply line and to prevent an accident by displaying pictures, letters, and an advertisement via wireless with the small receiving module comprising small chip LEDs(Light Emitting Diodes). A wireless electric signboard for guidance, advertisement, and interior lighting for turning on an LED(31) by wireless is composed of a transmitting coil(25) for generating an electromagnetic time varying magnetic field by receiving power; at least one repeater(22) repeating the electromagnetic time varying magnetic field generated in the transmitting coil, to a receiving coil(28); and a small receiving module(23) comprising the receiving coil receiving the repeated electromagnetic time varying magnetic field, a capacitor(29) resonating together with the receiving coil to effectively transmit induced electromotive force to an output stage, and the LED operated by the induced electromotive force.

Description

A Wireless Electric Light Panel and emitting light device using Small Receiving Module for Receiving Electro-magnetic Wave}

1 is a small receiving module operating by electromagnetic waves produced according to the present invention

2 is an electronic circuit showing a transmitter, a repeater, and a small receiver module manufactured according to the present invention.

3 is a perspective view showing a transmission unit, a repeater, and a small reception module designed and manufactured according to the present invention;

4 is a transmitter power supply circuit designed and manufactured to generate efficient electromagnetic waves in a transmitter of the present invention.

<Brief Description of Drawings>

11; Capacitor C1 12; LED (LED)

13; Diode D1 14; Receiving coil

15; Ferrite core

21; Transmitter 22; Repeater

23; Small receiving module 24; Power supply (transmitter)

25; Transmission coil 26; Relay coil

27; Capacitor 28; Receiving coil

29; Capacitor 30; diode

31; LED 32; Small Receive Module

41; Power supply 110V, 220V 42; fuse

43; Noise filter 44; Rectifier circuit

45; Driving and control circuits 46; Over Current Protection Circuit

47; Switching circuit 48; Transformer

49; Output signal

The present invention provides a repeater comprising a transmission coil and at least one relaying electromagnetic waves without using a power supply line at a predetermined distance between the transceivers in obtaining the induced electromotive force to the receiving coil by Faraday's law using the magnetic field of the time-varying electromagnetic wave. A small receiving module composed of a ferrite core, a receiving coil, a resonant capacitor, a rectifying chip diode, and a small chip light emitting device (LED, etc.) at a predetermined distance from the repeater is built in the small receiving module by wireless power supply. The present invention relates to a wireless display board and a wireless light emitting device capable of lighting up a light emitting device to achieve advertisement and guidance.

Conventional lighting technology has a problem that the power supply line is intricately entangled by supplying power through a wire, and thus requires a separate work to be processed so that it is unsightly and unsightly, and also uses a large number of LEDs as direct lighting methods. There are commercial opaque LED signboards that compose letters and figures for guidance and advertising, but there are problems in that wired power supply lines are intricately entangled on the back of the signboard, and relatively thick signboards, circuit complexity, manufacturing cost, and maintenance cost are required. .

In another conventional technology, the power supply line was coated with a transparent transparent film on the transparent glass to supply power to a light emitting device installed in the light emitting panel, thereby forming an electric display panel using the transparent glass, but the production cost according to the manufacturing process increases and maintenance is performed. There is a problem that is difficult.

The technical problem to be achieved by the present invention is to recognize the problems of the prior art as described above, provided with a transmission coil for electromagnetic wave transmission, transparent coil comprising a transmission coil and at least one relay relaying electromagnetic waves Alternatively, it is wound around the edge or surface of the transparent acrylic plate or near the small receiving module, and the small receiving unit comprises a ferrite core, a receiving coil, a resonance capacitor, a rectifying chip diode, and a small chip light emitting device (LED) at a predetermined distance from the relay coil. By implementing the wireless transparent LED board that can achieve the desired advertisement and guidance by providing a module, you do not need a separate power supply line, so you can use the aesthetics of the transparent LED board as it is clean and transparent, and achieve various forms of picture and text advertisement. The purpose is.

Another object of the present invention by using a small receiving module consisting of a small chip light emitting device (LED, etc.) to wirelessly realize the guidance and advertising in pictures or letters to prevent workers' safety accidents and greatly increase the production cost according to the manufacturing process And significantly reduce the cost for maintenance.

Another object of the present invention is to install a small receiving module consisting of the small chip light emitting device (LED, etc.) on one side of a transparent glass bowl and glass cup and install an electromagnetic wave transmitter and a repeater on one side of the table or under a glass plate. A wireless light emitting device is used to induce user's interest, use it for decoration, or illuminate a dark room by emitting a built-in light emitting device in a cup or glass bowl together with another repeater or a small receiving module alone. There is.

The present invention provides a repeater for relaying a transmission coil, one or more electromagnetic waves, and a ferrite core, a receiving coil, a resonant capacitor, and a rectifying chip diode without using a power supply line at a predetermined distance between the transmitter and receiver. The present invention relates to a wireless display board and a wireless light emitting device for lighting and advertising and guiding a light emitting device built in a small receiving module by using a small receiving module including a small chip light emitting device (LED, etc.).

Conventional lighting technology has a problem in that the power supply line is intricately entangled by supplying power through wires, and thus requires a separate work to be processed so that it is unsightly and unsightly. There are commercial opaque LED signboards that use letters to create text and graphics for guidance and advertising, but the back of the signboard is intricately intertwined with wired power supply lines, and the relatively thick boards, circuit complexity, manufacturing costs and maintenance costs are high. There is a problem.

In another conventional technology, there was a configuration in which a power supply line was coated with a transparent transparent film on a transparent glass to supply power to a lamp installed on the display panel to form an electric display panel using the transparent glass, but the production cost increases according to the manufacturing process and maintenance is performed. There is a problem that is difficult.

The present invention relates to a wireless electronic signboard using the LED devised to solve the problems of the prior art as described above. It looks at the drawings to facilitate the understanding of the present invention. 1 shows a small receiving module operating by an electromagnetic wave manufactured according to the present invention, and FIG. 2 is an electronic circuit showing a transmitter, a repeater, and a receiver designed and manufactured according to the present invention. 3 is a perspective view showing a transmitter, a repeater, and a receiver designed and manufactured according to the present invention. 4 is a block diagram of a power supply circuit of a transmitter designed and manufactured to generate efficient electromagnetic waves in the transmitter of the present invention.

It looks at with respect to the specific construction means of the present invention. According to the present invention, when a 110V or 220V power source is input at 60 ㎐, a pulse or sine wave signal of about 100 에는 is sent to the output coil to generate an electromagnetic wave from the transmitting coil, and the generated electromagnetic wave relays the electromagnetic wave through a relay coil for a predetermined distance. A small receiving module 32 composed of a receiving coil, a resonant capacitor, a rectifying chip diode, and a small chip light emitting device (LED, etc.) located apart from and receiving electromagnetic waves, and displaying characters and pictures for desired advertisement and guidance. It is to achieve a wireless display board.

According to the present invention, a power supply unit for generating an electromagnetic wave designed to efficiently generate induced electromotive force by an electromagnetic wave receiving coil is generated from an electromagnetic wave generated through a transmission coil and an electromagnetic wave repeater, and inputs 110 V or 220 V commercial power 41 of 60 kV. Operation and control circuit for controlling electromagnetic wave output after converting to DC power through noise elimination filter 43 for noise removal and rectifying circuit 44 composed of diodes through fuses for circuit protection using a power supply ( 45) and the overcurrent protection circuit 46, the switching circuit 47, and the transformer 48 are configured to output the desired voltage and frequency, that is, the output signal input to the transmission coil radiating electromagnetic waves is a constant voltage. And a pulse signal or sine wave signal with a high frequency of several tens of kHz or more is input.

The output signal of the power supply unit outputting the predetermined frequency and voltage radiates electromagnetic waves into the air by the transmission coil, and is amplified by the relay coil relaying the radiated electromagnetic waves into the air.

The electromagnetic wave emitted into the air is transmitted to the small receiving module 32 having the receiving coil designed and manufactured according to the present invention, and serves to emit light of the light emitting device by the induced electromotive force.

The small receiving module 32 includes a receiving coil 14 for receiving electromagnetic waves, a ferrite core for winding the receiving coil 14 in order to increase an inductance value of the receiving coil, and the receiving coil in order to maximize an induced electromotive force. And a resonant capacitor 11 constituting the resonant circuit, a rectifying chip diode 13 rectifying the received induced electromotive force, and a light emitting element 12 (small chip LED lamp) emitting light by the rectified power source. By installing the small receiving module on a transparent glass plate or a transparent acrylic plate to implement a wireless transparent display board that can achieve the desired advertisement and guidance, it does not need a separate power supply line can use the aesthetics of the transparent display board clean and transparent as it is It is possible to efficiently configure wireless signage for various forms of pictures, text guides, advertisements and interior lighting.

The small receiving module including the small chip light emitting device 12 (LED, etc.) is built in one side of a transparent glass bowl and glass cup, and an electromagnetic wave transmitting unit and one or more repeaters are installed at one side or under a glass plate of a table table or a decorative table. The light emitting device (12, LED) embedded in the cup or glass at the distance of the light to the user's curiosity and interest, and has the effect of illuminating the lighting effect and the dark room.

The small receiving module 32 includes a receiving coil for receiving the electromagnetic wave time-varying magnetic field, a capacitor for efficiently transmitting the electromotive force generated by resonating with the receiving coil to an output terminal, a rectifying diode for rectifying the induced electromotive force, and a DC power supply. A receiving coil configured as a small receiving module composed of a light emitting element 12 operated by the same or receiving the electromagnetic wave time-varying magnetic field, a capacitor for efficiently transferring the induced electromotive force to an output terminal by resonating with the receiving coil, and an AC power supply It can be configured as a light emitting element that operates by.

It looks at a specific embodiment according to the present invention.

EXAMPLES

Example 1

The specific embodiment 1 according to the present invention looks at the configuration and effect through the table and drawings. First, the present invention looks at a power supply designed and manufactured to efficiently radiate electromagnetic waves to supply power to a transmission coil. 4 is a block diagram of a power supply unit for supplying a transmission coil according to the present invention. Referring to the block diagram, when a 60 V 110V or 220V commercial power supply 41 is input, the noise included in the signal at the time of input is shown. It is equipped with a noise removing filter 43 for removing the noise, the rectified circuit 44 is formed by using a diode, the noise-free signal is converted into DC power, and the user controls to output an electromagnetic wave having the required output A switching circuit 47 and a transformer for generating an efficient electromagnetic wave at a desired frequency and voltage. (48), and outputs a signal having a voltage and frequency desired by the user (49), and the output signal is input to the transmission coil and configured to radiate electromagnetic waves. Can.

The power supplied to the transmission coil used for the embodiments of the present invention is configured to emit electromagnetic waves at 100 kHz while being AC 5V. 1 is a small receiving module designed and manufactured according to the present invention, and the small receiving module 32 has a light emitting device for emitting and receiving electromagnetic waves.

Table 1 shows the number of windings and the size of the coil constituting the transmitter and the repeater designed and manufactured according to the first embodiment of the present invention, these configurations are the output of the generated electromagnetic waves and the number of distance and the number of light emitting elements to be received It can be designed and produced differently according to the like. The transmission coil of the transmitter corresponds to 25 in FIG. 2, and corresponds to L1 in Table 1. The relay coil of the repeater corresponds to 26 in FIG. 2, and corresponds to L2 in Table 1. The transmission coil in Table 1 has 5 windings, 0.1 mm in diameter, 100 mm in width, inductance value of 5.7 uH, outer diameter of 70 mm, inner diameter of 65 mm, and thickness of 120 mm. Consists of The relay coil of the repeater has 27 windings, 0.1mm in diameter, 60mm in width, inductance of 154.0 uH, outer diameter of 85mm, inner diameter of 70mm, and thickness of 120mm. .

Table 1. Number of windings and size of coils forming the transmitter and repeater

Table 2 shows the number and size of windings of a receiving coil with a small receiving module incorporating a lamp designed and manufactured according to an embodiment of the present invention, and is generated from a transmitting coil using signals generated by the power supply and the power supply. The electromagnetic wave generated by the amplified relay through the repeater designed and manufactured to the electromagnetic wave value shown in Table 1 is measured the induced voltage, current and output through the receiving coil built in the small receiving module.

As shown in Table 2, the small receiving module designed and manufactured according to the first embodiment of the present invention has two types, and L3 corresponds to 28 in FIG. 2. The receiving coil of the small receiving module 1 has 18 windings, 0.1 mm in diameter, 1 mm in width, inductance of 15 uH, size of 3.8 mm in diameter and 2.2 mm in height. The other small receiving coil 2 has a number of windings of 38 times, a diameter of 0.1 mm, a width of 1 mm, an inductance value of 47 uH, a size of 5.5 mm in diameter, and a height of 2.2 mm. Consists of

Table 2. Number of windings, size and output of receiving coil with small receiving module

It consists of the transmission coil and the relay coil designed and manufactured as shown in Table 1, and supplies the signal generated through the power supply to the transmission coil to radiate electromagnetic waves, and relays the radiation of electromagnetic waves through the relay coil. As a result of measuring the voltage, current, and power in the designed and manufactured receiving module, the voltage was 3.3V, the current was 30 mA, and the power was 99 mA in the small receiving module (1). In the small receiving module 2, the voltage was 3.3V, the current was 59.1 mA, and the power was 195 mA. It can be seen that the voltage, current, and power appear much larger in the small receiving module 2 having a higher number of windings and a larger inductance.

In FIG. 2, 30 represents a rectifying diode, and 31 in FIG. 2 represents a light emitting device (LED). In Fig. 2, reference numeral 21 denotes a transmitter for transmitting electromagnetic waves, which includes a power supply unit 24 and a transmission coil 25, and 22, a relay for relaying electromagnetic waves, and a relay coil and a resonance capacitor 27. 2 to 23, a small receiving module is a receiving coil 28 for receiving electromagnetic waves radiated through the transmitting coil 25 and the relay coil 26 and the receiving coil 28 to resonate with the induced electromotive force as much as possible. Resonant capacitor 29 for output to the output stage, and rectified diode 30 for rectifying the induced electromotive force.

In Embodiment 1 of the present invention, the relay coil is installed adjacent to the transmission coil so that high current and voltage are measured in the light emitting devices 31 and LEDs built in each small receiving module, and the light emitting device 31 is driven by a high output. Will emit light. Solenoid repeater composed of the relay coil 26 and the capacitor 27 is installed adjacent to the transmission coil in the corner of the transparent glass or transparent acrylic plate to emit light emitting elements built in the receiving module located in the transparent plate to guide the desired character, Wireless signage for advertising and interior lighting can be achieved.

Example 2

Another embodiment 2 according to the present invention is designed and manufactured as shown in Table 3 by radiating electromagnetic waves through the transmission coil at the same voltage, output and frequency as the power supply unit used in Example 1 without using the repeater used in Example 1 A transmitter coil and a receiver coil were used to measure the output voltage, current, and power.

In Table 3, the transmission coil has 27 windings, 0.1 mm in diameter, 105 mm in width, inductance of 70 uH, outer diameter of 85 mm, inner diameter of 75 mm and thickness of 120 mm. It was configured to have a larger number of windings and inductance than in Example 1. In Table 3, the receiving coil of the small receiving module 1 has 18 windings, a diameter of 0.1 mm, a width of 1 mm, an inductance value of 15 uH, a size of 3.8 mm in diameter, and a height of 2.2 mm, the other small receiving coil 2 has a number of windings of 38 times, a diameter of 0.1 mm, a width of 1 mm, an inductance value of 47 uH, and a size of 5.5 mm in diameter. , The height was composed of 2.2 mm, and was configured in the same manner as in Example 1.

Table 5. Specification of Transmission Coil and Reception Coil according to Example 4

As a result of measuring the voltage, current, and output in the two small reception modules designed and manufactured, the voltage was .5 V, the current was 0, and the power was 0 kV in the small reception module 1. In the small receiving module 2, the voltage was 0.7V, the current was 0, and the power was 0 kW.

When using a small receiving module including a transmitter and a light emitting device (LED) without using a repeater as in Example 2, the light emitting device (LED) can not be turned on at a low output as shown in Table 3. Even if the transmission coil of more windings is used than in the first embodiment, it can be seen that the voltage is induced but little current flows due to the high resistance.

Example 3

According to another embodiment 3 of the present invention, a transmission coil and a repeater used in Example 1 are constructed using a spiral coil, and electromagnetic waves are transmitted through the transmission coil at the same voltage, output, and frequency as the power supply unit of the transmitter used in Example 1. It radiates and measures the voltage, current and output of the output stage by using the designed transmission coil and receiving coil as shown in Table 4 and Table 2.

The transmission coil in Table 4 has three winding times, a diameter of 0.12 mm, a width of 150 mm, an inductance of 3.0 uH, an outer diameter of 115 mm, an inner diameter of 105 mm, and a thickness of 120 mm. Consists of The relay coil of the repeater has 37 windings, 0.1mm in diameter, 105mm in width, inductance value of 70.0 uH, outer diameter of 120mm, inner diameter of 10mm, and thickness of 120mm. .

Table 4. Number of windings and size of coils forming the transmitter and repeater

The electromagnetic wave generated from the transmission coil by supplying the signal generated by the power supply unit is used to receive the electromagnetic field generated by the relay through the repeater designed and manufactured by the spiral coil as shown in Table 4 to receive the receiver coil embedded in the small receiving module. It measures the voltage, current and output acquired through the test.

As shown in Table 2, the small receiving module designed and manufactured according to the third embodiment of the present invention was configured in two ways, and the same as the small receiving module designed and manufactured in the first embodiment.

As shown in Table 4, the transmission coil and the relay coil are designed and manufactured to radiate electromagnetic waves by supplying the signal generated through the power supply to the transmission coil, and the two are designed through relay through the relay coil. As a result of measuring the voltage, current and output in the manufactured receiving module, the voltage was 3.2V, the current was 20.0㎃, and the power was 64 에서는 in the small receiving module (1). In the small receiving module 2, the voltage was 3.0V, the current was 46.0 mA, and the power was 138 mA. It can be seen that the voltage, current, and output are much larger in the small receiving module 2 having a higher number of windings and a large inductance.

In Embodiment 3 of the present invention, a spiral relay coil is installed adjacent to a transmission coil, and high currents and voltages are measured in light emitting devices (LEDs) built in each small receiving module, and the light emitting devices emit light therefrom. The repeater composed of the spiral relay coil and the capacitor is installed adjacent to the transmission coil in the corner of the transparent glass or acrylic plate to emit light emitting elements built into the small receiving module located in the transparent plate for wireless text guide, advertisement and interior lighting. The display board can be achieved.

Example 4

Another embodiment 4 according to the present invention is designed as shown in Table 5 by radiating electromagnetic waves through the transmission coil at the same voltage, output and frequency as the power supply unit used in Example 1 without using the spiral repeater used in Example 3 The voltage, current and output of the output stage were measured using the fabricated transmit and receive coils.

In Table 5, the transmission coil of the transmitter consists of a spiral coil, with 37 turns, 0.1 mm in diameter, 105 mm in width, inductance value of 70 uH, outer diameter of 120 mm and inner diameter of 10 mm. In Example 3, the number of winding coils and the value of inductance were configured to be large. In Table 5, the receiving coils of the small receiving module 1 and the small receiving coil 2 were configured in the same manner as in Example 3.

Table 5. Specification of Transmission Coil and Reception Coil according to Example 4

As a result of measuring the voltage, current, and output in the two small reception modules designed and manufactured, the voltage was .5 V, the current was 0, and the power was 0 kV in the small reception module 1. In the small receiving module 2, the voltage was 0.8V, the current was 0, and the power was 0 kW. It can be seen that the voltage, current, and output are much greater in the small receiving module 2 having a larger number of windings of the receiving coil and having a larger inductance, thereby preventing the light emitting device (LED) from emitting light.

As can be seen from Examples 1 to 4, the output of the power supplied to the transmission coil, the winding number of the transmission coil, and the inductance value are configured differently, and the winding number and inductance value of the relay coil of the repeater are different. In case of designing and manufacturing by varying the number of windings and inductance of receiving coil of small receiving module, it is transparent because small receiving module with built-in light emitting element (LED, etc.) can operate wirelessly at a certain distance over many times. Design and manufacture wireless billboards that can guide and advertise efficiently with letters and pictures in glass or transparent acrylic.

The small receiving module used in Examples 1 to 4 includes a receiving coil for receiving the electromagnetic wave time-variable field, a capacitor for efficiently transferring the induced electromotive force by resonating with the receiving coil, and an induced electromotive force. Although it is manufactured by a small receiving module composed of a rectifying diode rectifying and a light emitting element operated by a DC power supply, the receiving coil receiving the electromagnetic time varying magnetic field and the electromotive force generated by resonating with the receiving coil efficiently It may be composed of a capacitor for delivering to the output stage and the AC light emitting device operating with the induced electromotive force emitted through the capacitor.

In another aspect, the present invention is the interior decoration using a small receiving module that operates wirelessly in conjunction with the transmitter and at least one repeater, a transparent container located on a predetermined table, beer cups and wine glasses built in a small receiving module in various colors It is highly applicable in various fields by implementing a wireless light emitting device that can induce interest of users by configuring lighting.

The present invention is provided with a transmission coil for transmitting electromagnetic waves, the relay coil relaying the relay and the electromagnetic wave is wound around the edge or surface of the transparent glass or transparent acrylic plate, and the ferrite core, the receiving coil, A small receiving module composed of a resonant capacitor, a rectifying chip diode, and a small chip light emitting device (LED, etc.) can be configured together with another repeater or without a repeater to implement a wireless transparent electronic display board that can achieve desired advertisement and guidance. The power supply line is not necessary, so the aesthetics of the transparent display board can be used as it is clean and transparent, and there is an effect that can effectively perform various forms of picture and text advertising.

Another effect of the present invention by using a small receiving module consisting of a small chip light emitting device (LED) to realize the guidance and advertising in a picture or a letter wirelessly to significantly reduce the production cost according to the manufacturing process and greatly increase the cost for maintenance To save.

Another effect of the present invention is to embed the small receiving module consisting of the small chip light emitting device (LED) in one side of the transparent glass bowl and glass cup and to install the electromagnetic wave transmitter and repeater on one side or below the glass table of the cup or glass In addition to the other repeater in the bowl or alone to emit a small light emitting device (LED) built in the receiving module to induce the user's interest and to illuminate the dark room with the interior lighting and to display the aesthetic sense.

Claims (7)

In the device for lighting the light emitting element by wireless, A transmission coil that receives power and generates an electromagnetic wave time-varying magnetic field, A repeater composed of one or more relaying time-varying magnetic fields generated in the transmission coil to a reception coil; Guide, advertisement consisting of a receiving coil for receiving the relayed electromagnetic wave time-varying magnetic field, a capacitor for resonating with the receiving coil to efficiently transmit the induced electromotive force to the output terminal, and a light emitting device operating with the induced electromotive force And wireless scoreboard for interior lighting. The method according to claim 1, The small receiving module includes a receiving coil for receiving an electromagnetic wave time-varying magnetic field, a ferrite core that is a magnetic body for winding the receiving coil to efficiently receive electromagnetic waves, and a resonance for constituting the receiving coil and a resonance circuit to maximize an induced electromotive force. And an AC light emitting device operating with an induced electromotive force generated through the receiving coil and the resonance capacitor, or a receiving coil for receiving electromagnetic waves, and a ferrite that is a magnetic body for winding the receiving coil to efficiently receive electromagnetic waves. A core, a resonant capacitor constituting the receiving coil and the resonant circuit to maximize the induced electromotive force, a rectifying diode for rectifying the induced electromotive force passed through the receiving coil and the resonant capacitor, and operating with rectified electric power. Information, advertising and interior lighting consisting of DC light emitting elements Wireless billboard for. The method according to claim 1 or 2, The repeater is a wireless display board for guidance, advertising and interior lighting consisting of a relay coil for relaying electromagnetic waves generated from the transmission coil, and a capacitor for forming a resonance with the relay coil. The method according to claim 3, The relay coil of the repeater is a wireless electronic signboard for guidance, advertising and interior lighting consisting of a solenoid coil or a spiral coil. In the device for lighting the light emitting element by wireless, A transmission coil that receives power and generates an electromagnetic wave time-varying magnetic field, A repeater composed of one or more relaying time-varying magnetic fields generated in the transmission coil to a reception coil; It consists of a receiving coil for receiving the electromagnetic wave time-varying magnetic field, a capacitor and a light emitting element for efficiently transmitting the electromotive force generated by resonating with the receiving coil to an output terminal, or the receiving coil and the electromotive force generated by resonating with the receiving coil efficiently And a small receiving module including a capacitor for transmitting to an output terminal and a light emitting device operating with the induced electromotive force. The method according to claim 5, The small receiving module includes a receiving coil for receiving an electromagnetic wave time-varying magnetic field, a ferrite core that is a magnetic body for winding the receiving coil to efficiently receive electromagnetic waves, and a resonance for constituting the receiving coil and a resonance circuit to maximize an induced electromotive force. And an AC light emitting device operating with an induced electromotive force generated through the receiving coil and the resonance capacitor, or a receiving coil for receiving electromagnetic waves, and a ferrite that is a magnetic body for winding the receiving coil to efficiently receive electromagnetic waves. Resonant capacitors constituting the receiving coil and the resonant circuit, a rectifying diode for rectifying the induced electromotive force passed through the receiving coil and the resonant capacitor in order to maximize the induced electromotive force, and a DC operated by the rectified electric power. Wireless with a built-in small receiving module composed of light emitting elements Chi square. The method according to claim 1 or 5, And a power supply supplied to the transmission coil generating the electromagnetic wave time-varying magnetic field is composed of a pulse signal or a sine wave signal having a predetermined voltage and a high frequency of several tens of kHz or more.

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