KR101109465B1 - Method for repairing of the road sign board for dew proofing - Google Patents

Abstract

The present invention relates to a road sign repair method, and more specifically, to produce a three-dimensional protruding road traffic guide board using a light emitting element (LED) and a plastic lens to attach a retroreflective and highlight the outline of the character The present invention relates to a road sign repair method for preventing dew condensation.

To this end, the present invention in the road sign repair method for preventing condensation, the first step of producing a guide letter plate 221 by injection molding the road traffic guide letter or figure to protrude to a certain standard; A second step of constructing a parallel circuit 220 by electrically connecting a plurality of light emitting elements (LEDs) 222 therein according to the size and shape of the guide dial 221; A third step of mounting plastic lenses (228, 229) to diffuse or condense the light of the plurality of light emitting elements (LEDs) 222 connected in parallel to the upper side of the guide dial (221); A fourth step of completely sealing the transparent epoxy resin (223a, 223b) in a two-layer structure with the plastic lenses (228, 229) interposed therebetween so as to prevent moisture and dust from entering therein; The guide letter plate 221 has the same shape as the guide letter or figure, but any one or more of the light emitting device (LED) of the plurality of light emitting devices (LED) 222 receives the headlight of the car A fifth step of attaching a reflective retroreflective paper 230; and, after the fifth step is completed, any one of the letter / figure attachment plates 210 having the guide letter plate 221 as a transparent acrylic, polycarbonate, and aluminum extrusion plate. After selecting and attaching one, it includes a sixth step attached to the existing road sign 100, and the guide letter plate 221 of the fifth step, the base reflector is required when attached to the aluminum extrusion plate No, it provides a road sign repair method for preventing condensation, characterized in that it further comprises a seventh step of attaching with adhesive or bolt after using the base reflector when attached to the transparent acrylic plate do.

Therefore, the present invention prevents condensation and frost on the surface of the road sign even if the temperature difference between day and night occurs greatly, such as a season, soaring to subzero temperatures.

In addition, the three-dimensional and clear surface luminescence of the road traffic guide dial greatly improves the visibility of the driver at night.

In addition, the use of transparent epoxy resins, which are as expensive as the thickness of plastic lenses, can reduce the number of light emitting devices (LEDs), which are significantly reduced due to the inherent characteristics of the lenses, thereby greatly reducing power consumption and road sign manufacturing costs.

In addition, the existing road sign can be easily used by using it as it is, which has a unique effect of significantly reducing the waste of resources.

Information board, LED, plastic lens, transparent epoxy resin, retroreflective paper, glossy material

Description

Method for repairing of the road sign board for dew proofing}

The present invention relates to a road sign repair method, and more particularly, to produce a three-dimensional road traffic sign using LED and plastic lenses to attach a retroreflective and to prevent condensation coated with a glossy material that emphasizes the outline of the character. It is about road sign repair method.

In general, a road sign is used to guide the direction of the road by using letters, figures, and numbers, and is installed in a city center, a national road through which the vehicle passes, and provides road information to the driver of the vehicle.

Such road signs display letters or numbers as light-emitting paints on metal plates such as aluminum so that drivers can easily recognize them during the day and night.

However, in the case of road signs in which letters or numbers are displayed on metal plates used as light-emitting paints, condensation occurs when water droplets form on the surface of road signs due to the temperature difference between day and night. In addition, when the temperature drops sharply at night, when the temperature is below zero, water droplets caused by condensation are frozen, causing frost on road signs (see FIG. 1A).

As the condensation or frost phenomenon occurs, the surface of the road sign becomes cloudy and drivers cannot easily identify the information on the road sign. Therefore, researches have been continuously conducted by road sign experts to solve this problem.

On the other hand, according to the indoor / outdoor advertising material manufacturing method proposed in the Republic of Korea Patent Publication No. 2000-0072298 (Dec. 5, 2000), the predetermined thickness on the lower part and the side wall of the mold (1) and the shape of the advertising material Applying the gloss urethane paint (2), and the primary transparent epoxy (3) is applied to the upper surface of the gloss urethane paint (2), and a plurality of light emitting elements (4) in accordance with the type and shape of the mold (1) A second transparent epoxy 6 (or a transparent epoxy mixed with light scattering material) is applied to fix the upper, downward or lateral direction so that the plurality of light emitting devices 4 are buried, and then a translucent fluorescent pigment and a light dispersing material on the upper surface thereof. Is coated with a tertiary epoxy (7) mixed with the power supply to the lead wire (8), so that the surface light emission can be performed to serve as an advertisement (see Fig. 1 (b)).

However, this patent technology is complicated to fix the light emitting device to maximize the surface light emission of the text and shape of the advertisement using the light emitting device (LED), and the epoxy is applied to the inside of the mold for the first to third time following the glossy urethane paint. The work process to be applied is very complicated, which leads to an increase in manufacturing cost.

Therefore, the present invention is intended to prevent the condensation and frost phenomenon by making a three-dimensional road sign for the road traffic with a light emitting device (LED) and easy to manufacture and inexpensive plastic lens built in three-dimensionally.

Therefore, the present invention has been made to solve the above problems, the present invention relates to a road sign repair method, more specifically, a plurality of light emitting elements (LED) in the form of the road traffic guide letters or figures It has a plastic lens on the light emitting device, and attaches a retroreflective paper to the guide dial that is completely sealed with a transparent epoxy resin, and applies a gloss material that emphasizes the outline of the letters to prevent condensation and frost on the temperature drop. It also aims to provide a road sign repair method to prevent condensation that can be easily attached to existing road signs by further improving the driver's visibility.

According to a feature of the present invention for achieving the above object, in the road sign repair method for preventing condensation, to produce a guide letter plate 221 by molding and injection molded guide letters or figures for road traffic to a certain standard Step 1; A second step of constructing a parallel circuit 220 by electrically connecting a plurality of light emitting elements (LEDs) 222 therein according to the size and shape of the guide dial 221; A third step of mounting plastic lenses (228, 229) to diffuse or condense the light of the plurality of light emitting elements (LEDs) 222 connected in parallel to the upper side of the guide dial (221); A fourth step of completely sealing the transparent epoxy resin (223a, 223b) in a two-layer structure with the plastic lenses (228, 229) interposed therebetween so as to prevent moisture and dust from entering therein; The guide letter plate 221 has the same shape as the guide letter or figure, but any one or more of the light emitting device (LED) of the plurality of light emitting devices (LED) 222 receives the headlight of the car A fifth step of attaching a reflective retroreflective paper 230; and, after the fifth step is completed, any one of the letter / figure attachment plates 210 having the guide letter plate 221 as a transparent acrylic, polycarbonate, and aluminum extrusion plate. After selecting and attaching one, it includes a sixth step attached to the existing road sign 100, and the guide letter plate 221 of the fifth step, the base reflector is required when attached to the aluminum extrusion plate No, it provides a road sign repair method for preventing condensation, characterized in that it further comprises a seventh step of attaching with adhesive or bolt after using the base reflector when attached to the transparent acrylic plate do.

Preferably, a plurality of bolts 211 and nuts 216 and a binding bar at a lower end thereof are attached to the transparent acrylic, polycarbonate (PC) and aluminum extrusion plate to the existing road sign 100. And an eighth step of attaching the device 213 to the letter / figure attachment plate 210 in advance.

Preferably, one side of the existing road sign 100 is provided with one groove 214 to collect the wires of the plurality of light emitting devices (LEDs) 222 into one place, the rear of the light emitting And a ninth step of mounting a rectangular box 217 having a predetermined size so as to store a controller and a storage battery for controlling the device (LED) 222 and supplying power.

According to the road sign repair method for preventing condensation of the present invention has the following effects.

The present invention is a light emitting device (LED) and easy to manufacture road signs using a cheap plastic lens to protrude three-dimensionally protruding by attaching a retroreflective and a condensation prevention road sign coated with a glossy material to emphasize the outline of the character Simply attaches to an existing road sign,

(1) Prevents condensation and frost on the surface of road signs even if the temperature difference between day and night occurs largely like the changing seasons.

(2) The road traffic signboard has three-dimensional and clear surface light emission, which greatly improves the driver's visibility at night.

(3) In addition to reducing the use of expensive transparent epoxy resin as much as the thickness of the plastic lens, the unique characteristics of the lens also significantly reduces the number of light emitting devices (LEDs), greatly reducing power consumption and road sign manufacturing costs.

(4) Since it can be easily attached by using existing road signs, there is a unique effect that can significantly reduce the waste of resources.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings.

1 (a) is a view showing a conventional non-stereoscopic road sign, Figure 1 (b) is a view showing a production method using the conventional font and shape, Figure 2 is a preferred embodiment of the present invention Drawing showing the form of the guide plate for the road sign repair method for preventing condensation, Figure 3 is a plastic lens inside the form of the guide plate for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention Figure 4 is a view showing a state filled with a transparent epoxy resin in a two-layer structure between (concave lens), Figure 4 is inside the frame of the guide plate for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention Fig. 5 is a view showing a state in which a transparent epoxy resin is filled in a two-layer structure with a plastic lens (convex lens) interposed therebetween. Road sign for preventing condensation in accordance with a preferred embodiment three-dimensional view showing in detail a guide plate for the repair method, Figure 6 is a road sign for preventing condensation according to a preferred embodiment of the present invention by Figs. Three-dimensional view showing the completed state of the repair method, Figure 7 is a three-dimensional view showing the state of attaching the road sign produced by the road sign repair method for repairing condensation in accordance with a preferred embodiment of the present invention to the existing road sign 8 is a three-dimensional view showing another aspect of attaching a road sign produced by a road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention to an existing road sign, Figure 9 is a preferred embodiment of the present invention Binding bar for attaching road signs produced by road sign repair method to prevent condensation on existing road signs Figure 10 shows the three-dimensional and the value represents a flow diagram for a road sign maintenance method for the prevention of dew condensation in accordance with a preferred embodiment of the present invention.

2 and 9, the core technical configuration of the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention, the guide dial 221, a plurality of light emitting elements (LED) 222, plastic lens 228 and 229, transparent epoxy resins 223a and 223b, retroreflective paper 230, and glossy material 240.

First, referring to FIG. 2, the guide dial 221 is a mold means formed by injection molding a road traffic guide letter or a figure to protrude, and is made of transparent acrylic or polycarbonate (PC) as a material. The shape of the mold can be produced.

In addition, the guide dial 221 is attached to any one of the letter / figure attached plate 210 made of transparent acrylic, polycarbonate and aluminum extrusion plate, bolts 211 and the binding bar to the existing road sign 100 (bar) It shall be attached by the apparatus 212.

In addition, when the guide letter plate 221 is attached to the letter / figure attached plate 210 made of a transparent acrylic, polycarbonate and aluminum extrusion plate, after using the base reflector is to be attached with an adhesive or bolt.

This is for reflecting the light emitted from the light emitting element (LED) 222 to the guide dial 221 through a background reflector.

In addition, the guide letter plate 221, when attached to the aluminum extrusion plate does not need a background reflector, when attached to the transparent acrylic plate is to be attached with an adhesive or bolt after using the background reflector.

In addition, the guide dial 221 is provided with a conduit connector 225 on one side of the rear side so as to organize the wires 226 of the (-) terminal and the (+) terminal of the plurality of light emitting devices (LEDs) 222. .

And the guide dial 221 is made of a transparent acrylic or polycarbonate (PC) material, so the left and right sides except for the upper surface of the guide dial 221 is painted with a glossy paint or colored sheet paper, such as adhesive The light emitting device (LED) 222 and the plastic lenses 228 and 229 embedded in the guide dial 221 may be prevented from being exposed to the outside through the transparent material.

2 to 4, the light emitting device (LED) 222 is a means for providing illumination to the guide letter board 221, and according to the size and shape of the guide letter plate 221. A plurality of light emitting devices (LEDs) 222 electrically form a parallel circuit 220 and are not largely affected by the shape or shape of the light emitting devices (LEDs) 222.

Here, the light emitting device (LED) 222 is built into the guide letter plate 221 and generates heat by itself, so that a day and night temperature difference occurs largely like a season, so that even if the temperature drops sharply to below zero, the road sign ( Condensation and frost on the surface of the 200) can be sufficiently prevented.

In addition, the plurality of light emitting devices (LEDs) 222 are turned on by being supplied with a DC power by a storage battery (not shown) charged from a solar cell that generates solar light. Is controlled by

In addition, the plurality of light emitting elements (LEDs) 222 are fixed to the substrate 227 of the light emitting elements (LEDs) 222 provided at the lower end of the protrusion 224 of the guide letter plate 221 by primary soldering. The secondary resin is completely sealed and fixed by the transparent epoxy resin 223a.

3 to 5, the plastic lenses 228 and 229 may diffuse or condense the light lit by the plurality of light emitting elements (LEDs) 222 connected in parallel to an upper portion of the guide dial 221. As a means, it comprises a concave lens 228 for diffusing the light lit by the light emitting element (LED) 222 and a convex lens 229 for condensing the light.

In addition, the plastic lenses 228 and 229 are positioned on the plurality of light emitting devices (LEDs) 222 connected in parallel, and are completely sealed and fixed by the transparent epoxy resins 223a and 223b.

In addition, the plastic lenses 228 and 229 may be manufactured by embedding one plastic lens in the same manner as the shape or shape of the guide letter plate 221 or by using the light emitting device (LED) embedded in the guide letter plate 221 ( 222 may be manufactured independently of the number of shapes or shapes to be embedded independently.

Here, the plastic lenses 228 and 229 of the present invention are configured to diffuse light evenly on the guide letter plate 221 of the road sign or to condense light to a specific letter or figure to be expressed on the road sign, thereby driving at night. It is an important means of maximizing the light of the light emitting device (LED) 222 which generates surface light emission so as to secure visibility of the light and to provide accurate information about road signs. Therefore, the shape of the letter or figure protruding from the guide letter board 221 is maintained uniquely while maintaining its shape while maintaining the original function of the concave lens 228 and the convex lens 229. In addition, the plastic lenses 228 and 229 of the present invention may be made of a material which is easy to process and inexpensive like a plastic lens for LED lighting that is commonly used.

As such, the road sign for preventing condensation of the present invention is relatively easy to manufacture and fabricated in the guide letter board 221 using cheap plastic lenses 228 and 229, unlike the prior art, thereby providing the light emitting device (LED) ( In step 222, the light is uniformly maximized surface emission. In addition, the use of a transparent epoxy resin, which is as expensive as the plastic lens thickness, reduces the use of the lens, and the unique characteristics of the lens significantly reduces the number of light emitting devices (LEDs), thereby greatly reducing power consumption and cost of road sign production. Has characteristics.

The transparent epoxy resins 223a and 223b are completely sealed in a two-layer structure having the plastic lenses 228 and 229 embedded in the guide letter plate 221 interposed therebetween to prevent moisture and dust from entering. It is one of the thermosetting plastics.

In particular, the transparent epoxy resin (epoxy resin) is well used in adhesives, reinforced plastics, molds, protective coatings, etc., because it withstands water and weather changes quickly and hardens quickly. Therefore, in the present invention, the plurality of light emitting devices (LEDs) and the plastic lenses 228 and 229 are completely sealed and fixed to the inside of the guide dial 221, as well as the plurality of light emitting devices (LEDs) 222. When turned on, light is emitted and emitted from the first transparent epoxy resin 223a surrounding the plurality of light emitting devices (LEDs) 222, and then passes through the concave lens 228 or the convex lens 229, which is a plastic lens. Light is diffused or focused. In addition, the light diffused and condensed through the plastic lenses 228 and 229 passes through the secondary transparent epoxy resin 223b sealed on the plastic lenses 228 and 229, and the light is further emitted to guide the dial. Surface light emission is maximized at the upper part of the protrusion 224 of 221 to display more clear characters or figures.

5 and 6, the retroreflective paper 230 has the same shape as the guide letter or figure for road traffic, and is attached to the upper part of the guide letter plate 221 with an adhesive, and the plurality of light emitting devices (LEDs). At least one light emitting device (LED) 222 of the 222 is a means that reflects the headlights of the car at night.

Here, retroreflection refers to a reflection of light from a light source reflected from the surface of an object and back to the light source, and reflects light in the direction of the light source even if the retroreflective light is illuminated at any angle. In particular, when the headlights of the car are reflected on the retroreflective surface, the light is returned to the direction where the light is reflected so that the driver in the light source can easily see them.

Referring to FIG. 5, the gloss material 240 may be formed of a transparent acrylic or polycarbonate (PC) material to emphasize the outline of a character or a figure of the guide letter board 221 which is made of a character or figure. It is a kind of colored paint applied to the shape where the shape is bent.

Meanwhile, referring to FIG. 6, the condensation preventing road sign 200 completed through the above technical solution is shown on one side of the existing road sign 100.

7 to 9, the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention is shown in three dimensions.

That is, in order to simply attach the condensation preventing road sign 200 completed through FIGS. 2 to 6 to the existing road sign 100, the plurality of light emitting devices (LEDs) on one side of the existing road sign 100. One groove 214 is formed to collect the wires of the 222 in one place, and a controller (not shown) and a battery for controlling and supplying a plurality of light emitting devices (LEDs) 222 at the rear thereof. (Not shown), the rectangular box 217 having a predetermined size is to be mounted so as to store.

Here, the storage battery is charged by a solar cell (not shown) that generates solar power that can be installed on the road sign, and supplies power to the plurality of light emitting devices (LEDs) 222.

Meanwhile, referring to FIG. 9, in order to attach the letter / figure attachment plate 210, to which the guide letter plate 221 is attached by an adhesive or bolt, to the existing road sign plate 100, the letter / figure attachment plate is provided. A plurality of bolts 211 and nuts 216 are fixed to the upper and middle portions of the 210, and a binding bar device 212 is formed on the lower portion of the existing road sign 100. It is assumed that the groove 213 is fitted into and fixed.

In addition, the binding bar device 212, the two (-) character has a constant standard 212a has a constant spacing at the lower end of the letter / figure mounting plate 210 side by side in a straight line To be welded, grooves for fastening the bolts 212c are formed at one side of the two (-) ruler 212a.

In addition, the binding bar (bar) device 212, the (a) ruler (212b) and the (a) ruler (212b) to be fixed in close contact with the thickness of the existing road sign 100, the It is assumed that two grooves are formed so as to be symmetrical with the grooves of the (-) ruler 212a and are fixed with the bolts 212c and the nuts 212d.

Referring to Figure 10, the road sign repair method for preventing condensation according to a preferred embodiment of the present invention will be described through a flow chart as follows.

First, by using a transparent acrylic or polycarbonate (PC) material to form a molded injection molded guide letter or figure for road traffic to a certain standard (S 100).

The parallel circuit 220 is configured by electrically connecting a plurality of light emitting elements (LEDs) 222 therein according to the size and shape of the guide letter plate 221 (S 110).

Plastic lenses 228 and 229 are embedded in the guide letter plate 221 to diffuse or condense the light of the plurality of light emitting devices (LEDs) connected in parallel to the upper part of the letter board 221 (S). 120).

Filling the transparent epoxy resin (223a, 223b) in a two-layer structure with the plastic lens (228, 229) in between to completely seal the moisture and dust into the guide dial 221 (S 130).

The guide letter plate 221 has the same shape as the guide letter or figure, but any one or more of the light emitting device (LED) of the plurality of light emitting devices (LED) 222 receives the light of the headlights of the car The reflective retroreflective 230 is attached (S 140).

After the step (S 140), the guide letter plate 221 is selected from a transparent acrylic, a polycarbonate (PC) and an aluminum / plate extruded plate 210 of any one selected by adhesive or bolt By fixing a plurality of bolts 211 and nuts 216 to the existing road sign 100 (S 150).

In addition, when the guide letter plate 221 is attached to the aluminum extrusion plate, there is no need for a background reflector, and if it is attached to a transparent acrylic plate using a background reflector and then attached with an adhesive or bolt (S 160).

In addition, the plurality of bolts 211 and nuts 216 and the same in order to attach the letter / figure attached plate 210 made of the transparent acrylic, polycarbonate (PC) and aluminum extrusion plate to the existing road sign plate 100 It is assumed that the bar device 212 for binding to the lower end is mounted on the character / figure attachment plate 210 in advance (S 170).

In addition, one side of the conventional road sign 100 is provided with one groove 214 to collect the wires of the plurality of light emitting devices (LEDs) 222 into one place, the rear of the light emitting device (LED) In order to store the controller 222 and supply power, a rectangular box 217 having a predetermined size is installed to store a controller (not shown) and a storage battery (not shown) (S 180).

As described above, the road sign repair method for preventing condensation of the present invention, like the existing road sign 100, simply uses letters or numbers for road traffic guide letters or figures as a light-emitting paint on a metal plate such as aluminum. Instead of being displayed, a guide letter board 221 molded and molded to protrude from transparent acrylic or polycarbonate (PC) material, a plurality of light emitting elements (LEDs) 222 that generate heat, and a concave lens for diffusing light A new condensation preventing road sign with a plastic lens 228, 229, which is a convex lens 229 for condensing light, and a retroreflective light 230 for receiving and reflecting the headlights of an automobile, is simply incorporated into an existing road sign. It is designed to be attached so that it prevents condensation and frost on the surface of road signs due to temperature differences between day and night, such as changing seasons. Surface uniformly against the guide character or shape to maximize the light emission gives more increase the visibility of the driver in the night. In addition, the use of a transparent epoxy resin, which is as expensive as a plastic lens, can reduce the number of light emitting devices (LEDs). It can be easily attached by utilizing existing road signs as it is and has a unique feature that can waste resources.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 (a) is a view showing a conventional non-stereoscopic road sign

Figure 1 (b) is a view showing a production method using the conventional font and shape template

Figure 2 is a view showing the form of the form of the guide dial for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention

Figure 3 shows a state filled with a transparent epoxy resin in a two-layer structure with a plastic lens (concave lens) interposed inside the mold of the guide plate for the road sign repair method for preventing condensation according to a preferred embodiment of the present invention. drawing

Figure 4 shows a state filled with a transparent epoxy resin in a two-layer structure with a plastic lens (convex lens) between the inside of the form of the guide plate for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention. drawing

5 is a three-dimensional view showing in more detail the guide dial for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention by 2 to 4

Figure 6 is a three-dimensional view showing the completed appearance of the road sign repair method for preventing condensation according to the preferred embodiment of the present invention by 2 to 5

7 is a three-dimensional view showing a state of attaching the road sign produced by the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention to the existing road sign

8 is a three-dimensional view showing another aspect of attaching a road sign produced by the road sign prosthesis method for preventing condensation in accordance with a preferred embodiment of the present invention to the existing road sign

Figure 9 is a three-dimensional view showing the binding bar (bar) device for attaching the road sign produced by the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention to the existing road sign

10 is a flow chart for the road sign repair method for preventing condensation in accordance with a preferred embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

100: conventional road sign 200: condensation prevention road sign

210: character / shape attachment plate 211: fixing bolt

212: Binding Bar Device 213: Binding Bar Groove

214: existing road sign groove 215: bolt fastener

216: nut 217: rectangular box

220: parallel circuit 221: guide dial

222: light emitting device (LED) 223: transparent epoxy resin

223a: primary transparent epoxy resin 223b: secondary transparent epoxy resin

224: protrusion 225: conduit connector

226: wire 227: light emitting device (LED) substrate

228: concave lens 229: convex lens

230: retroreflective 240: glossy

Claims (4)

In road sign repair method to prevent condensation, A first step of forming a guide letter plate 221 by injection molding the road traffic guide letter or figure to a predetermined standard; A second step of constructing a parallel circuit 220 by electrically connecting a plurality of light emitting elements (LEDs) 222 therein according to the size and shape of the guide dial 221; A third step of mounting plastic lenses (228, 229) to diffuse or condense the light of the plurality of light emitting elements (LEDs) 222 connected in parallel to the upper side of the guide dial (221); A fourth step of completely sealing the transparent epoxy resin (223a, 223b) in a two-layer structure with the plastic lenses (228, 229) interposed therebetween so as to prevent moisture and dust from entering therein; The guide letter plate 221 has the same shape as the guide letter or figure, but any one or more of the light emitting device (LED) of the plurality of light emitting devices (LED) 222 receives the headlight of the car Attaching a reflecting retroreflector 230; After the fifth step, the guide letter plate 221 is selected and attached to any one of the letter / figure attached plate 210 made of transparent acrylic, polycarbonate and aluminum extrusion plate, and then to the existing road sign 100 A sixth step of attachment; In addition, the guide letter plate 221 of the fifth step, when attached to the aluminum extrusion plate does not need a background reflective paper, when attached to a transparent acrylic plate further uses a seventh step attached to the adhesive or bolt after using the background reflective paper Road sign repair method for preventing condensation, characterized in that it comprises a. delete According to claim 1, A plurality of bolts 211 and nuts 216 and the binding bar at the lower end for attaching the transparent acrylic, polycarbonate (PC) and aluminum extrusion plate to the existing road sign 100 (bar) Road sign repair method for preventing condensation, characterized in that it comprises an eighth step of mounting the device 213 to the character / figure attachment plate 210 in advance. According to claim 3, One side of the existing road sign 100, one groove 214 to make the wires of the plurality of light emitting devices (LED) 222 into one place, the rear side Condensation prevention, characterized in that it comprises a ninth step of mounting a rectangular box 217 having a predetermined size to store the controller and the storage battery to control the light emitting device (LED) 222 and to supply power Road sign repair method.

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