WO2018048113A1

WO2018048113A1 - Signboard assembly

Info

Publication number: WO2018048113A1
Application number: PCT/KR2017/009036
Authority: WO
Inventors: 김주영
Original assignee: 김주영; (주)이지
Priority date: 2016-09-06
Filing date: 2017-08-18
Publication date: 2018-03-15
Also published as: KR101726840B1

Abstract

The present invention relates to a signboard assembly installed to promote a company, a store, or the like. More specifically, the present invention relates to a signboard assembly including a frame, and a light transmitting panel and a light emitting means, which are disposed in the frame. The signboard assembly emits light by using a side irradiation method, has a design sheet on the light transmitting panel, thus allowing a consumer to more easily discern the design sheet, i.e., a drawing, a figure, or the like being advertised, and in particular, has a light guide sheet that is configured to be equal or smaller in size than the design sheet such that light can only be partially emitted by the design sheet part, rather than being emitted by the entire light transmitting panel.

Description

Signboard assembly

The present invention relates to a signboard assembly installed to promote a company, a shop, and the like, and more particularly, comprising a frame, a light transmitting panel and light emitting means provided in the frame, and using a side irradiation method The light emitting panel is provided with a pattern sheet on the floodlight panel so that a consumer can more easily identify a pattern sheet, that is, a picture or a figure to be advertised. The present invention relates to a signboard assembly that partially or lightly emits light, instead of the entire transmissive panel.

In general, in the aspect of a service or manufacturing company, the company promotes the superiority of its products and products to customers through advertisements.

In addition, in recent years, image advertisements are also variously classified into various methods of advertisement. In particular, a method using lighting means is generally used for signs, signboards, and signboards.

In the case of advertising signboards, illuminated figures or shapes are revealed using lighting means such as fluorescent lamps or cold cathode fluorescent lamps (CCFL) installed inside the fixing frame, and in the case of signboards, LEDs are installed inside the fixing frame. ) Is made in such a way as to illuminate the figured ad text using the light emitting means fixedly arranged.

Such a prior art is a registered utility model No. 20-0315268 `` panel structure of a full color sign board '',

The prior art relates to a panel structure of a full-color signboard that can completely improve the lighting efficiency by completely eliminating the shadow formed at the bottom of the panel where the ad text is drawn due to the overlap of the light emitted from the light emitting means seated inside the frame. The main panel has a predetermined thickness and diffuses the light radiated therein to the outside, and at least one subpanel attached to an outer surface of the main panel, disposed at the bottom of the main panel, coupled to the inside, and In the full-color signboard having a frame on which the light emitting means is mounted, a panel structure is provided between the wing subpanel and the light emitting means to form a transparent portion for preventing a shadow of light emitted from the light emitting means. .

However, the related art simply relates to a signboard that emits light to a letter or a background to improve an advertising effect. As the light is emitted in one direction, the light intensity is weak, and a sheet is attached to display a pattern by covering light. By doing so, there is a possibility that the outer sheet is peeled off due to temperature difference and moisture difference.

In addition, there is a prior art Patent Registration No. 10-0795901 『Wood Sign Board,

The prior art proposes a wooden sign board, characterized in that the mounting board formed with grooves on both sides of the wood grain direction in the sign board made of natural wood board and fixedly fixed to the mounting frame to prevent bending and cracks in the mounting portion Doing.

However, the prior art has a problem in that it is difficult to express patterns such as free shapes, drawings, etc., and the production cost increases as the wood is used.

Furthermore, there is a conventional utility model No. 20-2009-0003637 `` Signboard using full color LED '',

The prior art is equipped with a light emitting unit consisting of four LED chips of one-chip type combined with three primary color LED lamps of red, green, blue, and the like, and using flash-only software to change colors and output patterns in real time. It presents a signboard using full color LED that is manufactured and loaded into a converter to control and display color and output patterns by a controller.

In addition, there is a prior art Patent Registration No. 10-0787552 『advertising signboard having a direct-type color light emitting frame』,

The prior art forms an advertising paper and a light guide plate having a narrower width on the rear surface of the floodlight plate, and attaches and forms a light transmission frame of a frame on the rear surface of the floodlight plate, and forms a color printing part of various colors on the rear surface of the light transmission frame. In addition, there is proposed a signboard for advertisements having a direct-view color light emitting frame having light emitting means having LEDs in both directions between an inner end of the light transmitting frame and an outer end of the light guide plate.

However, the related arts simply relate to a signboard for improving advertisement effects by simply changing colors, and the structure is complicated due to the variety of colors, and there is a problem in that a new production is required to replace the advertisement.

Therefore, the present invention has been made to solve the above problems,

In the signboard assembly,

Light may be emitted through the rectangular frame, the light transmitting panel, the light emitting means, and the light guide sheet provided in the frame to highlight the pattern sheet provided in the light transmitting panel. In particular, the size of the light guide sheet may be the same as that of the pattern sheet. It is an object of the present invention to provide a signboard assembly configured to be small so that only part of the pattern sheet, not the entire floodlight panel, may emit light.

In addition, it is an object of the present invention to provide a signboard assembly that the user can select the desired amount of light by providing the light emitting means provided in the frame in any one or more directions of the rectangular frame.

Furthermore, it is another object of the present invention to provide a signboard assembly formed by forming a groove at a position corresponding to the edge of the pattern sheet so that the edge of the pattern sheet can emit stronger light.

In order to achieve the above object, the signboard assembly according to the present invention is

Square frame;

A light transmitting panel coupled to the frame and having a pattern sheet;

A light emitting means interposed in the frame, the light emitting member comprising a light emitting member for metering light to the light transmitting panel, and a PCB on which the light emitting member is mounted;

A light guide sheet provided at a position corresponding to the pattern sheet of the floodlight panel so that light emitted from the light emitting means is irradiated onto the pattern sheet;

Including but not limited to,

The size of the light guide sheet is the same as or smaller than the size of the pattern sheet is characterized in that only the pattern sheet portion of the light emitting panel to emit light.

Signboard assembly according to the present invention as described above

Through a light transmitting panel having a rectangular frame and a pattern sheet to be advertised in the frame and the light emitting means for emitting light to the light transmitting panel through a side irradiation method and the light guide sheet corresponding to the position of the pattern sheet It is possible to see the effect that the light is emitted to the glyph sheet, to maximize the advertising effect, and consumers can easily identify the picture or content of the glyph sheet.

At this time, since the light guide sheet is configured to have the same size or smaller size as the pattern sheet, the light guide sheet partially emits light instead of the entire transmissive panel, thereby making it possible to more reliably identify the pattern sheet.

Furthermore, as the groove part is further formed in the floodlight panel so as to correspond to the vicinity of the edge of the pattern sheet, the pattern sheet expressing a halo, in particular, a person can be surely attracted to the consumer's eyes by giving an optical illusion as if the halo is expressed. Has the effect of further improving the advertising effect.

1 is a perspective view of a signboard assembly according to the present invention;

2 is a cross-sectional view of the signboard assembly according to the present invention;

3A and 3B are circuit diagrams of a signboard assembly according to the present invention.

* Description of the symbols for the main parts of the drawings

A: Signboard Assembly

10: frame 11: horizontal frame

13: vertical frame 20: floodlight panel

21: pattern sheet 23: the first panel

24: second panel 25: glyph sheet insert

27: groove portion 30: light emitting means

31: light emitting member 33: PCB

40: light guide sheet

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Since the present invention may be modified in various ways and have various forms, embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same or similar functions, and unless otherwise specified, each member in the figures The member referred to by the reference numeral may be regarded as a member conforming to these criteria.

In addition, in the drawings, the components are exaggerated in size (or thick) in size (or thick) in size (or thin) or simplified in consideration of the convenience of understanding and the like, thereby limiting the scope of protection of the present invention. It should not be.

The terminology used herein is for the purpose of describing particular embodiments (suns, aspects, and embodiments) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

First, as shown in FIGS. 1 and 2, the signboard assembly A according to the present invention includes a rectangular frame 10, a light transmitting panel 20 provided in the frame 10, and light emitting means 30. And a light guide sheet 40.

In more detail with respect to the configuration of the frame 10 is made of a square, a pair of horizontal frame 11 and a pair of vertical frame 13 in a structure that is coupled to each other one rectangular frame ( 10).

The rectangular frame 10 is to form an advertising unit therein, the light transmitting panel 20 is provided in the advertising unit, the frame 10 is fitted to the light transmitting panel 20, one rectangular frame 10 can be formed.

In addition, the frame 10 can be interpolated with the light emitting means 30 and the cable for applying power to the light emitting means 30 to be described later, so that the cable does not protrude to the outside so as not to harm the aesthetics.

Again, the frame 10 is provided with a light transmitting panel 20, the light transmitting panel 20 is made of a transparent material such as glass, acrylic, and can penetrate the light emitted from the side by the light emitting means 30 Can be. At this time, the light transmitting panel 20 is most preferably made of acrylic lighter than glass and less risk of breakage.

The floodlight panel 20 is provided with a pattern sheet 21, more specifically, the pattern sheet 21 is represented by figures, pictures, phrases, etc. to cause the advertising effect, the pattern sheet 21 The coupling panel 20 is composed of a first panel 23 and a second panel 24, and the pattern sheet inserting portion 25 is formed between the first panel 23 and the second panel 24. It is provided to be spaced apart to form a), the pattern sheet inserting portion 25 is configured to be provided with a pattern sheet 21.

Accordingly, the glyph sheet 21 does not protrude to the outside to prevent deformation and breakage due to external shock, temperature, and humidity difference, and further, the glyph sheet 21 can be easily replaced so that the advertisement changes. By replacing only the design sheet 21 has an effect that can reduce the maintenance cost.

In addition, the light emitting means 30 is further provided in the frame 10 to emit light to the pattern sheet 21, that is, the light transmitting panel 20. The light emitting means 30 is composed of a PCB 33 and the light emitting member 31 provided on the PCB 33, the light emitting member 31 is preferably made of LED to reduce the power consumption.

As the light emitting means 30 is provided in the frame 10, the light is emitted by the side irradiation method. At this time, the pattern sheet 21 emits the light irradiated to the pattern sheet 21 in order to emit light. The light guide sheet 40 is further provided.

More specifically, the light guide sheet 40 is attached to the rear end of the light transmission panel 20, more specifically, to the rear end of the second panel 24, and is attached to correspond to the position of the pattern sheet 21. Will be. Accordingly, the light emitted from the side surface is emitted to the front surface by the light guide sheet 40, and thus, only the pattern sheet 21 is emitted when viewed from the outside, and the portion where the pattern sheet 21 is not provided is transparent and is distinguishable. Increase the advertising effect can be maximized.

In addition, the light guide sheet 40 is provided at the rear end of the pattern sheet 21, and the shape of the pattern sheet 21 may not be properly seen due to backlight due to the light reflection by the light guide sheet 40. . Therefore, in order to solve this problem, the signboard assembly A according to the present invention constitutes the light guide sheet 40 which is the same as or smaller than the size of the pattern sheet 21 so that the light of the light guide sheet 40 is patterned sheet 21. The light reflected by) is prevented from being diverged out of the pattern sheet 21, so that the consumer can more accurately identify the contents and pictures of the pattern sheet 21, thereby improving the advertising effect.

Furthermore, as shown in the figure, in recent years, corporate image advertising is prevalent, and for this purpose, rather than promoting a certain product to promote the image of the model often causes a rise in the corporate image.

Therefore, in order to further elevate the image of the pattern sheet 21, that is, the model, the signboard assembly A according to the present invention has a groove portion in the light transmitting panel 20 at a position corresponding to the edge of the pattern sheet 21. 27) by promoting diffuse reflection of light to diffuse the light emitted more, the model can cause the optical illusion that the halo occurs. In addition, the groove portion 27 is a V-shaped groove portion 27 having a cross-sectional shape of the V-shape, it is preferable to be formed continuously along the edge of the pattern sheet 21, but the scope of rights should not be limited interpretation do.

In addition, it is also possible to implement the light emitting means 30 in a variety of colors, and in some cases it is also possible to mix several colors together, or to display a variety of visual effects using a separate relay device, and limited interpretation Can not be done.

Furthermore, the signboard assembly (A) according to the present invention is connected to the cable, the control unit for controlling the light of the light emitting means 30 is further provided, the control unit is the operation of the light emitting means 30 through a control signal To control.

At this time, noise may be introduced into the control signal due to various external factors such as the influence of high frequency, the interference of the strong electric field of the power supply unit, and the influence of the external environment (temperature, humidity, dust, etc.).

Noise introduced into the control signal may increase or decrease the voltage level of the control signal, causing unstable operation of each component, and may also cause malfunction and failure.

In order to solve this problem, the present invention includes a signal generation module 100 for generating a control signal in a clean state that excludes the possibility of inflow of noise, and detects and removes noise to be introduced into the control signal in advance, thereby making it stable. Operation control was made possible.

The signal generation module 100 of the present invention detects and removes noise through various steps, and finally detects whether the control signal includes noise prior to outputting the control signal.

Hereinafter, the signal generation module 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3A and 3B.

(Names of device units are not distinguished for convenience of description. Therefore, it is preferable to infer through the circuits in which each device is included or to interpret them separately by reference numerals.)

As shown in the figure, the signal generation module 100 includes a noise amplifier 110 for amplifying a DC signal power supply, a noise detector 120 for detecting noise included in the amplified signal power supply, and removing the detected noise. The filter unit 130, the filter driver 140 driving the filter unit only at the time of noise detection, the signal generator 150 for generating a control signal from the signal power source from which the noise is removed, and the signal for stabilizing and outputting the generated control signal. It includes an output unit 160.

The signal generation module 100 amplifies the DC signal power in the noise amplification unit 110 to amplify the noise included therein so as to facilitate detection, and detects the noise included in the signal power supply amplified by the noise detector 120. In addition, while removing the noise detected by the filter unit 130, the filter driving unit 140 to perform the noise removal process only when the noise is detected to prevent unnecessary power consumption and operation overload, the signal generation unit 150 A clean control signal is generated from the signal power supply from which the noise is removed, and the signal output unit 160 checks whether it is clean and outputs the clean control signal.

Hereinafter, a detailed description of each component of the signal generation module 100, a description of an operation process, and a description thereof will be made with reference to the accompanying drawings.

The noise amplifier 110 includes a first amplifier circuit 111 for first amplifying a signal power supply and a second amplifier circuit 112 for second amplification.

The first amplifying circuit 111 and the second amplifying circuit 112 have the same structure and have a distribution resistor R101 connected to the positive ends of the amplifiers A101 and A102 and A101 and A102, respectively. (R102) (R103) (R104) and capacitors (C101) (C102), feedback resistors (R105) (R106) and capacitors (C105) connected in parallel between the output terminals of the amplifiers (A101) and (A102) and the (-) terminals in parallel. (C106).

The operation and effect of the first amplifier circuit 111 and the second amplifier circuit 112 will be described using the first amplifier circuit 111 as an example. The amplifier A101 is divided into a distribution resistor (R101) and a feedback resistor (R102). R106), and the ground resistor acts as a non-inverting amplifier to amplify the voltage level of the signal power supply so that the noise is also amplified to facilitate detection of the noise. At this time, the feedback capacitor C105 prevents the oscillation of the amplifier A101.

In the second amplification circuit 112, the signal power is amplified through the same process.

In addition, the noise amplifier 110 is characterized in that the amplifier output terminal of the first amplifier circuit 111 and the amplifier (+) terminal of the second amplifier circuit 112 is connected to each other, through which the signal power supply is the first amplifier circuit As it is first amplified at 111 and the output thereof is transmitted to the second amplification circuit 112 to be amplified secondly, the signal power is amplified more significantly in double to facilitate noise detection.

Next, the noise detector 120 includes a comparator 121, an application circuit 122 connected to the negative terminal of the comparator 121, and a reference circuit 123 connected to the positive terminal of the comparator 121. It is done by

More specifically, the application circuit 122 includes a resistor R201 for removing DC components, a capacitor C201, and a resistor R202 for checking noise.

In addition, the reference circuit 123 includes bias resistors R203, R204, and R205 arranged in parallel to each other to provide a reference voltage for noise determination.

Referring to the operation and effect of the noise detector 120 having the above configuration and features, the application circuit 122 directs the signal power amplified by the noise amplifier 110 through a resistor R201 and a capacitor C201. Remove components and leave only noise components. Thereafter, a noise component is applied to the resistor R202.

Thereafter, the reference circuit generates a reference voltage by the bias resistors R203, R204, and R205, and detects whether noise is generated by the comparator 121 comparing the reference voltage with the noise voltage applied to the resistor R202. When the noise is detected, the drive signal is transmitted to the filter driver 140 to drive the filter 130 to remove the noise included in the signal power supply, and when the noise is not detected, the non-driven signal is transmitted to the filter driver 140. Alternatively, the signal power is directly transmitted to the signal generation unit without driving the filter unit 130 by not transmitting the signal. (Selection of the embodiment of transmitting the non-driven signal or not transmitting the signal is the specification of the filter driver 140. Will vary depending on.)

(The specific circuit configuration of the filter driver 140 is already well known, and a detailed description thereof will be omitted even if the detailed description thereof is omitted.)

In addition, as illustrated in the drawing, the noise detector 120 may further include a delay circuit 124 for delaying a signal transmitted to the relay.

The delay circuit 124 includes a reverse diode D201 and a resistor R206 arranged in parallel with each other, and a capacitor C202 connected in parallel thereto.

Through the provision of the delay circuit 124, the life of the filter driver 140 can be extended. Generally, the noise is not generated continuously or periodically but is intermittently generated, so that the filter driver 140 can be driven or not driven. Since the lifespan decreases repeatedly, the delay circuit 124 may be provided to continuously drive the filter driver 140 until a predetermined time elapses after the filter driver 140 operates.

Next, the filter unit 130 includes first to

third filtering circuits

131, 132, and 133 to which each output terminal and the input terminal are sequentially connected.

The first filtering circuit 131 includes npn type first and second transistors Q301 and Q302 to which emitters and collectors are connected to each other, and includes bases of the first and second transistors Q301 and Q302. Switching diodes D301 and D302 and capacitors C301 and C302 arranged in parallel with each other are connected to each other, and two parallel electrodes are disposed between the base of the first transistor Q301 and the base of the second transistor Q302. Two capacitors C303 and C304 and two resistors R303 and R304 in series with the capacitor C304 are connected to each other.

In addition, the second filtering circuit 132 has the same structure as the first filtering circuit 131.

In addition, the third filtering circuit 133 includes two capacitors C305 and C306 arranged in parallel with each other, and two resistors R305 and R306 connected in series with the capacitor C306, and the second filtering circuit 132. ) And the third filtering circuit 133 is provided with a backflow prevention diode (D303).

Through the filter unit 130 having the above configuration and features, it is possible to remove the noise over three stages, which is superior to the conventional noise filter, and has a superior noise removing effect, and has a constant waveform close to DC after removing the noise. Because it can output the output, there is an advantage that does not need to go through additional rectification or directing process.

Next, the signal generator 150 includes a plurality of diodes D501 (D502) providing a voltage drop for generating a control signal, a filtering inductor L501 connected in series, and diodes D501 (D502). Filtering capacitors C501, C02, C503, and C504 connected in parallel to the inductor L501.

Although two voltage drop diodes D501 and D502 are illustrated in the drawing, only two or more voltage drop diodes D501 and D502 may be provided, depending on the required voltage drop.

Referring to the operation and characteristics of the signal generation unit 150, the signal power without noise is passed through the voltage drop diodes (D501) (D502) while being converted to a voltage level suitable for the control signal, inflow or The generated noise is removed by the filtering inductor L501 and the filtering capacitors C501, C02, C503, and C504 to generate a clean control signal and transmit it to the signal output unit 160.

Next, the signal output unit 160 is an output control element 161 for controlling the output of the control signal, the stabilization circuit 162 connected to the output control element 161 to remove the noise contained in the control signal, the output A sensing circuit 163 connected to the control element 161 for sensing a state of a control signal and feeding back to the output control element 161, and a power supply circuit 164 for supplying power to the output control element 161. It is done by

Referring to the operation and characteristics of each circuit, first, the stabilization circuit 162 includes a resistor R601 and a diode D601 connected in series and a capacitor C601 connected in parallel thereto.

The stabilization circuit 162 stores the transmitted control signal in the capacitor C601 through the resistor R601 and the diode D601 to provide a buffer against the inflow of the signal, thereby suppressing the interruption of the control signal, and output control element ( 161 to prevent overload.

The next sensing circuit 163 includes a voltage conversion resistor R602, a resistor R603, and a filtering capacitor C602 and C603.

The sensing circuit 163 converts the current of the control signal into a voltage through the resistor R602, is applied to the resistor R603, filtered through the capacitors C602 and C603, and transferred to the output control element 161. do. Thereafter, the output control device 161 checks whether the control signal to be finally output through the sensing circuit 163 includes noise or outputs a control signal or commands re-filtering of the control signal.

Next, the power supply circuit 164 includes a voltage converting resistor R604 (R605), a charging capacitor C604 (C605) (C606) connected in parallel thereto, and a discharge preventing diode D604 connected in series thereto.

The output control element 161 is preferably driven at all times as an element for finally checking and outputting the output state of the control signal. It is preferable. To this end, the power supply circuit 164 is provided to separately supply power for driving the output control element 161 by appropriately processing the signal power.

The power supply circuit 164 stores the signal power without noise through the voltage conversion resistors R604 and R605 in the capacitors C604, C605 and C606, so that the output control element 161 can be operated even in an emergency situation. Power is supplied to the capacitor, and at this time, the power charged in the capacitors C604, C605, and C606 through the diode D604 is not discharged. Allow power to be supplied.

In the above description, the description of the additional elements constituting each circuit has been omitted, but it is possible to change the design according to the practice of those skilled in the art.

In addition, in the above description of the present invention, the signboard assembly having a specific shape, structure, and configuration has been described with reference to the accompanying drawings. However, the present invention can be variously modified, changed, and replaced by those skilled in the art. And substitutions should be interpreted as falling within the protection scope of the present invention.

Claims

Square frame;

A light transmitting panel coupled to the frame and having a pattern sheet;

A light emitting means interposed in the frame, the light emitting member comprising a light emitting member for metering light to the light transmitting panel, and a PCB on which the light emitting member is mounted;

A light guide sheet provided at a position corresponding to the pattern sheet of the floodlight panel so that light emitted from the light emitting means is irradiated onto the pattern sheet;

Including but not limited to,

The size of the light guide sheet is the same as or smaller than the size of the pattern sheet is provided signboard assembly, characterized in that only the pattern sheet of the light emitting panel to emit light.
The method of claim 1,

The light emitting means

Signboard assembly, characterized in that provided in any one or more directions of the rectangular frame.
The method of claim 1,

The floodlight panel

Signboard assembly, characterized in that the groove is formed to correspond to the border of the pattern sheet.
The method according to any one of claims 1 to 3,

The light emitting means

A control unit for controlling the operation of the light emitting means is further provided,

The control unit

A noise amplifier for amplifying the DC signal power supply, a noise detector for detecting the noise contained in the amplified signal power supply, a filter for removing the detected noise, a filter driver for driving the filter only when the noise is detected, a signal power supply for removing the noise And a signal generation module having a signal generation unit for generating a control signal from the signal output unit and a signal output unit for checking and outputting the generated control signal.

The noise amplifier includes a first amplifier circuit for first amplifying the signal power supply, and a second amplifier circuit for a second amplification,

The first amplifying circuit and the second amplifying circuit are divided into resistors R101, R102, R103, R103, and R104 connected to the positive terminals of the amplifiers A101, A102, A101, A102, respectively. A capacitor (C101) (C102), a feedback resistor (R105) (R106) and a capacitor (C105) (C106) connected in parallel between the output terminal of the amplifier (A101) and (A102) and the (-) terminal, respectively, The amplifier output terminal of the first amplifier circuit and the amplifier (+) terminal of the second amplifier circuit are connected to each other,

The noise detector includes a comparator, an application circuit connected to the (-) end of the comparator, and a reference circuit connected to the (+) end of the comparator, wherein the application circuit includes a DC component removing resistor R201 and a capacitor disposed in series with each other. (C201) and noise checking resistor (R202), the reference circuit includes bias resistors (R203) (R204) (R205) arranged in parallel with each other to provide a reference voltage for noise determination,

The filter unit includes first to third filtering circuits in which output terminals and input terminals are sequentially connected, and the first filtering circuit includes npn type first and second transistors Q301 having emitters and collectors connected to each other. (Q302), the switching diodes (D301) (D302) and capacitors (C301) and (C302) arranged in parallel to each other are connected to bases of the first and second transistors (Q301) and (Q302), respectively, Two capacitors C303 and C304 disposed in parallel between the base of the first transistor Q301 and the base of the second transistor Q302, and two resistors R303 and R304 in series with the capacitor C304. Is connected,

The second filtering circuit has the same structure as the first filtering circuit,

The third filtering circuit includes two capacitors C305 and C306 arranged in parallel with each other, and two resistors R305 and R306 connected in series with the capacitor C306, and the second filtering circuit 132 and Between the third filtering circuit 133 is provided with a reverse flow prevention diode (D303),

The signal generator includes a plurality of diodes D501 and D502 for providing a voltage drop for generating a control signal, a filtering inductor L501 connected in series, and parallel to the diodes D501 and D502 and the inductor L501. Signboard assembly comprising connected filtering capacitors (C501) (C502) (C503) (C504).