KR20180000558A - EL signs having an efficient waterproof and prepared in that way EL signs - Google Patents

Abstract

The present invention relates to an electroluminescent (EL) signboard manufacturing method. The EL signboard manufacturing method includes: an insulation step of forming an insulation layer to block the moisture from the entire part of an EL plate; a coating step for forming and coating a UV coating layer to enhance the surface hardness and blocking the UV rays and moisture from the entire part of the other surface of the EL plate completed through the insulation step; a fixing step of forming a waterproof coat layer by coating and drying liquid urethane on two or four side end surfaces on the edges of the EL plate complained through the coating step in the shape of C; and a waterproof coating step of additionally forming an external UV coating layer to prevent discoloration and moisture penetration on the entire part or a surface of the EL plate completed through the fixing step. According to the present invention, EL signboard can block the moisture in various forms including the liquid, vapor, and even fog in a small amount from entering the inside and completely prevent malfunction due to moisture while extending the service life of the EL signboard and improving the quality thereof.

Description

Technical Field [0001] The present invention relates to a method of manufacturing an EL sign having a waterproof function and an EL sign prepared thereby,

The present invention relates to a method of manufacturing an EL signboard having a waterproof function and an EL signboard manufactured thereby. More specifically, the present invention relates not only to various kinds of liquid such as liquid or water penetrating into the EL signboard, It is possible to completely block the loss of the light emitting function of the EL sign due to moisture, moisture, wetting, etc. in any bad condition, and also to improve the overall life of the EL signboard due to this, The present invention relates to a method for manufacturing an EL sign having a waterproof function and an EL sign prepared thereby.

Normally, signboards and signposts can be used for the purpose of making the contents of their names, sales products, mutual, and business type in each institution, store, sales office, In recent years, with the development of the optical industry, there has been a demand for LEDs (light emitting diodes) and signs using OLEDs (light emitting diodes), which are used for various purposes such as road signs, milestones, subway guide boards, Are spreading like the latest fashion, and EL (Electro-luminescent) is used in addition to this. Organic Electro-luminescent (EL) displays are used for display of characters and images in mobile phones, PDAs, and car stereo liquid crystal displays. However, they are mainly used for small-sized displays, Inorganic Electro-luminescent (MID) and small-sized guide signboards are often used. Here, although the detailed description of the low power consumption and the usefulness of the brightness of the LED signboard is well known, the problem of solving the problem caused by generating a large amount of heat is not only difficult but also the dust and waterproofing There is also a case where it is difficult to solve the problem of the origin.

On the other hand, guide signs and the like using an inorganic EL light emitter are very little used. Such an inorganic EL light emitter has an extremely thin and flexible structure with a thickness of about 0.01 mm to 0.5 mm, There is a feature that a soft light can be produced as light emission. In addition, it can emit light in the form of a curved surface, has low power consumption, does not generate heat very much, and is very strong against vibration and impact. However, in the case of such an inorganic EL sign, since the waterproof function is very weak or the waterproof function is not properly performed, it is at a level that the user simply does not touch the rain or installs and uses the water without the water, And it is difficult to use variously for various applications such as backlighting of industrial devices and products. It also hinders the life of EL signs and also acts as a stumbling block to high quality improvement. Nevertheless, it is hoped that the application range will be widespread depending on whether the waterproof function is properly applied or not, depending on whether it is used or not, such as an EL guide billboard, EL display board, and EL traffic sign. As prior art related to this, Korean Utility Model Publication No. 2000-0019534 (Prior Art 1), Korean Registered Utility Model No. 20-0370478 (Prior Art 2), Korean Patent Laid-Open No. 10-2008-0107005 (Prior art document 3) and the like are known.

In order to attach the fixing plate for fixing the EL so that the EL is positioned in the groove of the EL SHEET insertion portion inside the lower case, a rib is provided on the lower side of the lower case, as disclosed in Korean Utility Model Publication No. 2000-0019534 And a rib is formed to fix the position of the display panel and a groove into which the display panel can be inserted when the upper case is coupled to the lower case is formed, A display panel or a billboard can be alternately inserted. However, in the case of the prior art document 1, it is expected that the effect of enabling a plurality of signboards or billboards to be replaced with one case, but there is insufficient mention about the close installation or replacement of signboards in accordance with various site conditions, And moisture can not be blocked, which makes it difficult to use for a long time.

In the technical content of Korean Registered Utility Model No. 20-0370478, which is a prior art document 2, there is provided a publicity means 1 having a predetermined width and length, and various letters and shapes are displayed on the surface of the publicity means 1 And a power input terminal 3 for receiving a power supply to one side of the promoting means 1 is provided and a power input terminal 3 for supplying power to the power input terminal 3 is provided, And the power supply line 4 is installed close to the publicity means.

Also, according to Korean Patent Laid-Open Publication No. 10-2008-0107005, which is a prior art document 3, an EL sheet provided with power supply lines on both sides and an upper surface of the EL sheet are adhered and fixed, And the adhesive sheet is adhered and fixed to the bottom surface of the adhesive sheet so that the plurality of adhesive sheets are detachably connected to each other.

However, in the prior art 2, since the self-emitting EL UV coating is coated on the surface of the publicity means, an effect of not using a separate lighting means is expected, but this also prevents the inflow of moisture or moisture due to rain There is a problem that it is difficult to use for a long period of time. In the prior art document 3, power supply lines are provided on both sides of the EL sheet so that a plurality of EL sheets are mutually connected so as to be detachably connected. There is insufficient mention of close installation or replacement after installation in accordance with the situation of the site, and it is still vulnerable to moisture such as rainwater, which may lead to electric shock, etc., and thus flexibility for seeking change in various guide signs is expected It has a hard limit.

Korean Utility Model Application Publication No. 2000-0019534 "Display panel replacement type EL display panel" Korean Registered Utility Model No. 20-0370478 entitled "Advertisement Apparatus with EL-UV Coating" Korean Patent Laid-Open No. 10-2008-0107005 entitled "

Accordingly, it is an object of the present invention to fundamentally solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an EL display device capable of preventing various kinds of liquids, water, EL signs with waterproof function that can prevent the luminescence loss of EL signs due to moisture, moisture, wetting, etc. in any bad conditions and also help to improve the overall life of EL signs due to this, as well as quality improvement And an EL sign (or an EL plate) manufactured by the method.

In order to accomplish the above object, the present invention provides a method of manufacturing a light emitting diode (LED), which comprises sequentially applying ITO (Indium Tin Oxide), a light emitting layer (fluorescent layer), a conductive carbon layer, In constructing an EL sign (or an EL plate) that can guide various expressions or information such as figures, symbols, patterns, etc.,

Forming an insulation layer on the entire one surface of the EL plate so as to be insulated from moisture while blocking moisture; A coating step of applying and coating a UV coating layer so as to increase the surface hardness while blocking ultraviolet rays, moisture and the like on the entire other surface of the completed EL panel through the insulation step; A fixing step of covering the liquid urethane with a liquid urethane on the edge side of two or four sides of the completed EL plate through the coating step and drying the liquid urethane to form a waterproof lid layer; And a waterproof coating step of additionally forming an external UV coating layer on the whole or one side of the completed EL plate through the fixing step to prevent moisture penetration and color fade.

At this time, the outer UV coating layer in the waterproof coating step is provided with a pair of transparent coated paper for covering both sides of the EL plate, or a transparent coated paper for wrapping one side of the coated paper, and flows for about 2 to 3 seconds between rollers heated to about 105 to 165 캜 A transparent coated paper may be further attached to both sides or one side of the EL plate and the transparent coated paper may be either a PET film formed to a thickness of about 100 to 500 탆 or a polyester film formed to a thickness of 100 to 300 탆 And then attaching them.

It should be understood, however, that the terminology or words of the present specification and claims should not be construed in an ordinary sense or in a dictionary, and that the inventors shall not be limited to the concept of a term It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

As described in the above construction and operation, the present invention can prevent moisture of various types of liquid or water permeating into the EL sign, water, moisture or moisture even in the worst case by blocking any inflow of fine moisture or mist particles. It is possible to completely block the loss of the light emitting function of the EL signboard due to wetting or the like, and to provide an effect of greatly improving the quality of the EL signboard as well as the overall life span of the EL signboard.

1 is a cross-sectional view of a laminated structure of an EL signboard having no waterproof function
Fig. 2 is a flowchart showing a method of manufacturing an EL signboard having a waterproof function in order
3 is a block diagram sequentially showing a method of manufacturing an EL signpost having a waterproof function
4 is a cross-sectional view of an EL sign having a waterproof function
FIGS. 5A and 5B are perspective views sequentially showing the combination of the EL signage having waterproof function

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

Fig. 1 is a cross-sectional view of a laminated structure of an EL signboard having no waterproof function, Fig. 2 is a flowchart showing a method of manufacturing an EL signboard having waterproof function in order, and Fig. 3 shows a method of manufacturing an EL signboard having a waterproof function 4 is a cross-sectional view of an EL signboard having a waterproof function, and Figs. 5A to 5C are perspective views sequentially showing engagement of an EL signboard having a waterproof function. Fig.

The EL plate 1 according to the present invention is formed by sequentially applying ITO (Indium Tin Oxide), light emitting layer (fluorescent layer), conductive carbon layer, and the like on one surface of a PET-based resin material, (Or an EL plate) that can guide various expressions or information such as shapes, symbols, patterns, and the like, and an EL sign prepared thereby.

1, the conventional EL plate 1 includes ITO (Indium Tin Oxide: 50), light emitting layer (fluorescent layer: 51), dielectric layer / insulating layer 52, and conductive The carbon layer 53, the conductive silver layer 54, the moisture-proof layer 55, and the insulating layer 56 are sequentially laminated. However, sometimes another material is added or omitted between the layers, Their thickness is about 20 to 300 탆 and they are laminated in a very thin film form. Here, since the usefulness of the conventional EL plate 1 is great, a detailed description is omitted, but the problem of the side cross-sectional waterproofing is disadvantageous. In other words, when the conventional EL plate 1 is cut off at a convenience, moisture and moisture permeate the edges of the four sides, eventually shortening the lifetime of the EL plate 1 significantly or causing a problem of malfunction Although it acts as a factor, there are many cases where even the cause of the problem is unknown. Therefore, while exploring a solution from a new viewpoint, the present invention will be described in terms of securing novelty and usefulness according to the EL plate 1.

In the conventional EL plate 1, light is emitted by the current flowing through the oscillating EL light-emitting body (fluorescent layer) coated on the resin surface of the PET series. That is, an ITO (Indium Tin Oxide) conductor 50 is deposited on the PET film P by a sputtering method. Then, a light emitting body (phosphor 51) is deposited to a thickness of about 20 to 40 μm The dielectric layer / insulating layer 52, the conductive carbon layer 53, the conductive silver layer 54, and the moisture-proof layer 55, each having a thickness of about 10 to 50 μm, are sequentially applied about 2 to 4 times And then the insulating layer 56 is further coated again to a thickness of about 10 to 50 占 퐉 about 2 to 4 times to form one EL plate 1. The present invention can be applied to an EL signboard having a waterproof function through the main constituting steps of an insulation step (S10), a coating step (S20), a fixing step (S30) and a waterproof coating step (S40) 3) are completed, which will be described in order from the insulation step S10 in order.

In the insulating step (S10) according to the present invention, the insulating layer (10) is formed over the whole surface of the EL plate (1) so as to be insulated from moisture while blocking moisture. The insulating layer 10 at this time is an insulating layer 10 different from the insulating layer 56 coated on one surface of the conventional EL plate 1 and includes a second insulating layer 10 coated with an epoxy- . The insulating layer 10 is laminated on one side of the above-described EL plate 1, that is, in a direction in which the advertisement 2 is not displayed. It is advantageous to laminate a plurality of layers rather than a single layer, but it is also necessary to consider economical aspects. The thickness of the insulating layer 10 may be about 10 to 300 탆, and preferably about 10 to 50 탆.

 In the coating step S20 according to the present invention, ultraviolet rays and moisture can be shielded on the entire opposite surface (direction in which light is transmitted) of the EL plate 1 coated with the insulating layer 10, UV coating layer 20 is applied. The UV coating layer 20 according to the coating step S20 may be applied to the entire surface of the EL panel 1 and may be applied to one side or both sides on which the advertisement 11 is displayed. The advertisement material 11 can be protected from the UV coating layer 20 since it must be exposed in the outer direction at all times. Immediately after the UV coating layer 20 is applied, the advertisement material 11 is exposed through the UV drier It is completed by drying. The UV coating layer 20 is not limited to one operation, and the effect can be expected to increase by performing the operation several times in order to form the thick UV coating layer 20.

In the fixing step S30 according to the present invention, liquid urethane is overlaid on a side surface of two edges or four sides of the EL plate 1 completed through the coating step, To form a waterproof cover layer (30). The insulating layer 10 and the UV coating layer 20 formed on one surface (rear surface) and the other surface (front surface) of the EL plate 1 are both accommodated in the fixing step S30, A liquid urethane is formed on the side surface of the four sides in a " C " shape with a thickness of about 10 to 300 mu m to form a waterproof cover layer 30, which is generally formed to a thickness of about 10 to 50 mu m . By doing so, both the front and rear surfaces of the EL plate 1 and the side surfaces thereof can be protected, and moisture, moisture, foreign substances, and the like can be prevented. Particularly, when the edge of the EL panel 1 is exposed to an unfavorable external environment for a long time, fine dust and various foreign substances are piled up and pressed together, which causes static electricity generation factors and sparks. The waterproof cover layer 30 is formed in the form of a U-shaped liquid urethane on the two side edges or the four side edges of the side wall 1 of the main body 1 to prevent risk of infiltration of fine materials and dust, It is possible to manufacture the EL plate 3 having the waterproof function so that the lifetime of the EL plate 3 becomes long to be not more than a few tens of years, .

The liquid urethane forming the waterproof cover layer 30 is mainly a polyurethane coating and is completed by applying to a side face portion of two or four sides with a roller or a sponge, Moisture and humidity, and thus moisture and various kinds of fine foreign substances that flow into the EL plate 3 are intrinsically blocked.

In the waterproof coating step S40 according to the present invention, the outer UV coating layer 40 is formed by wrapping the outer circumferential surface of the completed EL plate 3 through the fixing step S30 to prevent moisture penetration and color fade. The external UV coating layer 40 in the waterproof coating step S40 covers the outer circumferential surface of the EL plate 3 coated with the insulating layer 10, the UV coating layer 20 and the waterproof cover layer 30, It acts to prevent the inflow of fine dusts.

 The outer UV coating layer 40 of the waterproof coating step S40 includes a pair of transparent coated paper 41 or a transparent coated paper 41 surrounding the entire upper and lower surfaces of the EL panel 3, The transparent coated paper 41 may be further adhered to both sides or one side of the EL plate 3 by flowing between the rollers heated to about 165 DEG C for 2 to 3 seconds and the transparent coated paper 41 may be adhered to 100 A PET film formed to a thickness of about 500 탆 or less and a polyester film formed to a thickness of about 100 to 300 탆 are selectively attached. In the water-repellent coating step S40, a pair of transparent coated paper 41 is placed on the upper and lower surfaces of the EL plate 3, respectively, and flows between the upper and lower rollers, And the entire outer surface of the cover 3 is covered and attached, thereby forming attachment portions 42 on both sides.

The transparent coated paper 41 in the waterproof coating step S40 is selectively attached according to the use state. The selection of the transparent coated paper 41 can be performed by selecting the inside of the EL signboard 3 having waterproof function, . ≪ / RTI > That is, when it is installed outdoors, a PET film formed to a thickness of about 300 탆 is used. It has excellent strength and heat resistance, and is strong against external scratches. On the other hand, when it is installed indoors, a polyester film formed to a thickness of about 150 to 200 탆 is used. Since the PET film is thinner than the PET film, its strength and heat resistance are lower than that of a PET film. It is possible to use the polyester film sufficiently. It should be noted that the water-repellent coating step (S40) described above may be omitted depending on various uses of the EL signboard 3 having a waterproof function.

The insulating layer 10 is formed on one side (back side) of the EL plate 1 in the insulating step S10 through the above manufacturing method and the UV coating layer And the waterproof cover layer 30 is applied to the edge side portions of the EL plate 1 in the fixing step S30 to constitute the EL sign 3 having the waterproof function, An outer UV coating layer 40 is additionally formed to cover the entire outer circumferential surface or one surface portion to prevent moisture penetration and color fade. By doing so, water and dust that may flow into the EL panel 3 are shielded from the source, and the outer circumferential surface of the EL panel 3 is completely blocked through the external UV coating layer 40, Lt; / RTI >

The reference symbol E is an EL emission sign.

According to the present invention, even when various kinds of water such as liquid or water permeated into the EL sign are blocked as well as fine moisture or mist particles are infiltrated, it is possible to prevent the EL sign due to moisture, moisture, Emitting function of the EL display panel can be cut off entirely, and the EL display panel can be greatly improved in quality as well as the overall lifetime of the EL display panel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

1: Original EL plate 3: EL plate with waterproof function
10: insulation layer 11: advertising
20: UV coating layer 30: waterproof cover layer
40: external UV coating layer 41: transparent coated paper
42: Attachment S10: Isolation step
S20: Coating step S30: Fixing step
S40: Waterproof coating step E: EL emission sign
P: PET resin material

Claims (4)

(Indium Tin Oxide), a light emitting layer (fluorescent layer), a conductive carbon layer, and the like are sequentially applied to one side of a PET-based resin material, and then the light is diverted to the other side of the outer surface to provide various expressions such as characters, figures, symbols, Information and the like can be guided in the following manner:
(S10) for forming an insulating layer (10) so as to be able to insulate the entire one surface of the EL panel (1) while shielding moisture from the insulating layer
A coating step (S20) of applying and coating a UV coating layer (20) so as to increase the surface hardness while shielding ultraviolet rays and moisture from the entire other surface of the completed EL panel (1) through the insulation step (S10);
The liquid urethane is overlaid on the edge side of two or four sides of the EL plate 1 completed in the coating step S20 and dried to form a waterproof cover layer 30 (S30); And
And a waterproof coating step (S40) of wrapping the outer circumferential surface of the completed EL plate (3) through the fixing step (S30) to add and form an external UV coating layer (40) so as to prevent moisture penetration and color fading And a waterproof function of the EL sign. The method according to claim 1,
The outer UV coating layer 40 of the waterproof coating step S40 includes a pair of transparent coated paper 41 or both sides of the EL plate 3 and a transparent coated paper 41 surrounding the EL plate 3, And the transparent coated paper (41) is further attached to both sides or one side of the EL plate (3) by flowing for 2 to 3 seconds between the rollers heated inside and outside of the EL plate (3). The insulating layer 10 is formed on the entire one surface (back surface) of the EL plate 1 in the insulating step S10 through the above manufacturing method and the entire surface of the EL plate 1 on the entire surface The UV coating layer 20 is applied and the liquid urethane is overlaid on the edge side of the EL plate 1 in the fixing step S30 and then dried to form the waterproof cover layer 30, And an outer UV coating layer 40 is additionally formed to cover the outer circumferential surface of the EL plate 3 to prevent water penetration and color fade. The method according to claim 1 or 3,
The insulating layer 10 is formed on the entire one surface (rear surface) of the EL plate 1 in the insulating step S10 and the UV coating layer 20 is formed on the entire other surface of the EL plate 1 in the coating step S20. The liquid urethane is overlaid on the edge side of the EL plate 1 in a fixing step S30 and then dried to form a waterproof cover layer 30, And the formation of the external UV coating layer (40) in the coating step (S40) may be omitted.

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