JP6606943B2 - LED information display panel with snow melting function and LED information display device - Google Patents

Description

  The present invention relates to an LED information display panel with a snow melting function and an LED information display device.

  In recent years, various LED information display panels such as a dot matrix display device that displays information such as desired characters and symbols by selectively emitting light from LED elements mounted in a matrix are rapidly spreading (patents). Reference 1). Such LED information display panels are also spreading as traffic information information display devices on highways, for example.

  Actually, such LED information display panels are installed in various places on the highway, and various traffic information is displayed and transmitted to a passing vehicle at any time. However, in the case of sudden and serious changes in road conditions such as traffic accidents, etc., depending on only the display device that is permanently installed in such a specific position, it may not always be possible to specify an unspecified location and time. It is not possible to display necessary information at a necessary place in response to an accident that occurs.

  In order to deal with this problem, it is light and foldable, so it can be easily transported to the required location (for example, an accident site on a highway) when necessary, and the installation and withdrawal at the installation site can be shortened. A portable LED information display panel that can be performed in time has been proposed (see Patent Document 2).

  On the other hand, when used outdoors such as an accident site on a highway, it may be affected by the weather of the installation environment. For example, when used in a snowy area, the visibility may deteriorate due to snow on the LED information display section of the LED information display panel. Since the LED information display panel generates less heat than an information display device such as an incandescent bulb, there is a problem that the snow on the surface of the LED information display panel that has landed on snow remains without melting.

  In order to cope with this problem, the LED information display panel of the LED information display panel arranges a plurality of cord-like heating wires on the surface side of the LED information display section, so that the air inside the snow melting unit is heated, so that the LED information that has snowed Snow on the surface of the display panel can be instantly melted (see Patent Document 3).

JP 2008-218674 A JP 2011-40570 A JP 2009-299335 A

  On the outermost surface of the LED information display panel with a snow melting function described in Patent Document 3, an acrylic plate is used simply from the viewpoint of transparency, and water droplets in which snow has melted remain attached to the surface of the LED information display panel. When the state continues for a long time, the surface of the LED information display panel becomes dirty, and the visibility of information displayed on the LED information display panel is reduced.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to make the information displayed on the LED information display panel visible due to dirt caused by water droplets adhering to the surface of the LED information display panel. It is providing the LED information display panel and LED information display apparatus which can reduce a fall.

  As a result of intensive studies to solve the above problems, the present inventors solved the above problems if the LED information display panel with a snow melting function has a water repellent layer on the outermost surface on the LED information display surface side. As a result, the present invention has been completed.

  (1) An LED information display panel with a snow melting function, comprising an LED mounting module in which an LED element is mounted on an LED element substrate, and a snow melting mechanism, with water on the outermost surface on the LED information display surface side LED information display panel with a snow melting function provided with a water repellent layer having a contact angle of 90 degrees or more.

  (2) The LED information display panel with a snow melting function according to (1), wherein the water repellent layer is a fluororesin.

  (3) The LED information display panel with a snow melting function according to (1), wherein the water repellent layer is a fluororesin film.

  (4) The LED information display panel with a snow melting function according to any one of (1) to (3), wherein the snow melting mechanism is disposed on the LED mounting module on the LED information display surface side.

  (5) The LED information display panel with a snow melting function according to any one of (1) to (4), wherein the snow melting mechanism is configured by a metal wiring portion formed on a surface of a resin base material.

  The LED information display panel with a snow melting function of the present invention prevents snow on the outermost surface on the information display surface side of the LED information display panel with a snow melting function, or snow that has snowed on the outermost surface on the information display surface side or the like. It is possible to melt, and to reduce the deterioration of the visibility of information displayed on the LED information display panel due to dirt caused by water droplets attached to the outermost surface on the information display surface side of the LED information display panel it can.

It is a perspective view which shows the whole structure of the LED information display apparatus of this invention. It is a partial perspective top view of the LED information display panel with a snow melting function of this invention. It is the elements on larger scale of the LED information display panel with a snow melting function of this invention. It is sectional drawing which shows typically the cross section in the AA of the LED information display panel of FIG.

  Hereinafter, each embodiment of the LED information display panel with snow melting function and the LED information display device of the present invention will be described. The present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the object of the present invention.

<LED information display panel with snow melting function>
[overall structure]
As shown in FIG. 1, the LED information display panel 100 with a snow melting function of the present embodiment is an information display device in which a plurality of LED mounting modules 10 are connected in the horizontal direction. The LED mounting module 10 is a member in which a plurality of LED elements 3 are mounted in a matrix on the LED element substrate 1 and is a display member capable of displaying character information and the like. As shown in FIG. 4, the plurality of LED mounting modules 10 are stably accommodated between the display surface side resin sheet 21 and the back surface side resin sheet 22 constituting the accommodation sheet 2. Hereinafter, the LED information display panel 100 with a snow melting function in which a plurality of LED mounting modules 10 are linearly connected in one direction will be described as a representative embodiment of the present invention. Even if it is a LED information display panel with a snow melting function which has the single LED mounting module 10 which is not connected severally, as long as it satisfies other essential structural requirements, it is in the scope of the present invention.

  Moreover, a water repellent layer is provided on the outermost surface on the LED information display surface side of the LED information display panel 100 with a snow melting function of the present embodiment. By providing a water repellent layer on the outermost surface, it is possible to reduce a decrease in the visibility of information displayed on the LED information display panel due to dirt caused by water droplets attached to the water repellent layer that is the outermost surface of the LED information display panel. Can do.

  Furthermore, a snow melting mechanism that is a laminated sheet including a resin base material, a metal wiring portion, and an insulating buffer layer is provided on the information display surface side of the LED information display panel 100 with a snow melting function of the present embodiment. The snow-melting mechanism mainly prevents the surface of the snow-melting mechanism from having a heat so that the snow-covering function of the LED information display panel with the snow-melting mechanism 100 on the information display surface side of the LED information display panel with the snow-melting function is prevented from snowing. It has a function of melting the snow that has landed on the outermost surface on the surface side. Hereinafter, each component which comprises the LED information display panel with a snow melting function of this embodiment is demonstrated.

[Water repellent layer]
A water repellent layer is provided on the outermost surface on the LED information display surface side of the LED information display panel 100 with a snow melting function of the present embodiment. The water repellent layer is a resin layer having a water contact angle of 90 degrees or more, and has a function of allowing water droplets attached to the outermost surface on the LED information display surface side of the LED information display panel 100 to easily flow down. The water contact angle of the water repellent layer is preferably 120 degrees or more.

  The water repellent layer is not particularly limited as long as it has a water contact angle of 90 degrees or more. For example, PCTFE (polychlorotrifluoroethylene), PFA (tetrafluoroethylene perfluoroalkylvinyl ester copolymer) , Fluorine resin films such as PTFE (polytetrafluoroethylene), ETFE (tetrafluoroethylene / ethylene copolymer), PVDF (polyvinylidene fluoride), and the surface of a resin such as polyethylene terephthalate (PET) Examples thereof include a resin sheet obtained by laminating a fluorine-based resin by lamination. When the water-repellent layer is a fluororesin, and more preferably the water-repellent layer is a fluororesin film, a water-repellent layer having high heat resistance, light resistance and the like can be obtained. Therefore, the durability of the LED information display panel with a snow melting function can be improved by providing a water-repellent layer made of a fluororesin on the outermost surface of the LED information display panel with a snow melting function. Therefore, it is extremely useful to use a fluorine-based resin for the water repellent layer of the LED information display panel with a snow melting function of the present invention, which is assumed to be mainly used outdoors. In addition, the measurement of a contact angle can be measured by using the wettability test method by the sessile drop method based on JISR3257, for example. As a measuring device, for example, a contact angle meter (product name “DM500”) manufactured by Kyowa Interface Chemical Co., Ltd. can be used.

[Snow melting mechanism]
The snow melting mechanism 24 according to the present invention mainly prevents snow on the outermost surface on the information display surface side of the LED information display panel with a snow melting function or melts snow that has snowed on the outermost surface on the information display surface side. It is a laminated sheet having a function capable of. In the snow melting mechanism according to the present embodiment, a metal wiring portion is formed on the surface of the resin base material. The metal wiring part is formed on the surface of the resin base material means that the LED display surface side of the LED information display panel with a snow melting function or the opposite side of the LED display surface is directly or via an adhesive layer on the resin base material. It is formed on the surface. As shown in FIG. 4, the snow melting mechanism according to the present embodiment includes an insulating buffer layer 241 in addition to the resin base material 243 and the metal wiring portion 242. The snow melting mechanism 24 shown in FIG. 4 is disposed on the information display surface side of the LED mounting module. In addition, arrangement | positioning of the snow melting function of the LED information display panel with a snow melting function of this invention is not limited to arrangement | positioning of the snow melting function of the LED information display panel with a snow melting function shown in FIG.

  Among the above arrangements, the snow melting mechanism is arranged on the LED information display surface side of the snow melting function LED information display panel as in the LED information display panel with snow melting function 100 in FIG. It is preferable. By providing a snow melting mechanism at a position close to the outermost surface of the LED information display panel, it is possible to prevent snow from reaching the outermost surface on the information display surface side of the LED information display panel with a snow melting function with less power consumption, or an information display surface Snow that has landed on the outermost surface of the side can be melted.

  The mechanism constituting the snow melting mechanism according to the present invention is not particularly limited. For example, as in the snow melting mechanism illustrated in FIG. 4, the resin base material 241 b and the metal wiring part 242 are laminated via the adhesive layer 244. The laminated sheet which can be illustrated can be illustrated. In addition, an insulating buffer layer 243 made of a resin layer is provided on the resin base material 241b and the metal wiring part 242.

  In the snow melting mechanism according to the present embodiment, when the metal wiring part 242 is energized, the metal wiring part 242 itself generates heat. Then, heat is transmitted to the insulating buffer layer 243 that is in direct contact with the metal wiring part 242. As heat is transmitted to the insulating buffer layer 243, heat is transmitted to the water repellent layer 25. Heat is transmitted to the water repellent layer 25 to prevent snow on the information display surface side of the LED information display panel with a snow melting function, or to melt snow that has landed on the information display surface side. can do.

(Metal wiring part)
As described above, the metal wiring portion 242 has a function of generating heat when energized. Further, by increasing the electrical resistance value of the metal wiring part 242, more heat can be generated. In order to increase the electrical resistance value of the metal wiring part 242, for example, the line width of the metal wiring part 242 may be reduced. By reducing the line width of the metal wiring part 242, the cross-sectional area of the metal wiring part 242 is reduced, so that the electrical resistance value of the metal wiring part 242 can be increased.

  Although the metal used as a material of a metal wiring part is not specifically limited, For example, aluminum, gold | metal | money, silver, copper etc. can be illustrated.

  The metal wiring portion 242 is preferably a copper wiring portion having a line width of 5 μm or more and 50 μm or less, and more preferably a copper wiring portion having a width of 10 μm or more and 20 μm or less. Since the metal wiring part 242 is a copper wiring part having a line width of 5 μm or more, the risk of disconnection that may occur in the metal wiring part 242 can be reduced, and the metal wiring part 242 can have high durability. it can. Since the metal wiring part 242 is a copper wiring part having a line width of 50 μm or less, the electrical resistance value can be increased to the extent that the metal wiring part 242 can easily generate heat. Therefore, heat can be generated in the metal wiring part 242 with smaller power consumption.

  The film thickness of the metal wiring part 242 is preferably 10 μm or more and 75 μm or less, and more preferably 12 μm or more and 35 μm or less. When the film thickness of the metal wiring part 242 is 10 μm or more, the risk of disconnection that may occur in the metal wiring part 242 can be reduced, and the metal wiring part 242 with good durability can be obtained. By setting the film thickness of the metal wiring part 242 to 75 μm or less, the electric resistance value can be increased to the extent that heat generation of the metal wiring part 242 is facilitated. Therefore, heat can be generated in the metal wiring part 242 with smaller power consumption. In addition, the snow melting mechanism 24 in which the metal wiring part 242 is formed on the resin base material 241b can maintain sufficient flexibility, and can prevent deterioration in handling properties due to an increase in weight.

  Moreover, since the snow melting mechanism regarding this embodiment may be arrange | positioned at the information display surface side of the LED mounting module 10, it is highly transparent as a whole, and from the LED mounting module 10 also through the snow melting mechanism regarding this embodiment. It is preferable to make the light emission of the LED element visible. In order to make the light emission of the LED element from the LED mounting module 10 visible, a metal coating that is a ratio of the metal wiring portion area to the resin base material area with an insulating buffer layer 241 described later as a transparent resin layer The rate is preferably 0.2% or more and 5.0% or less, and more preferably 0.3% or more and 3.0% or less. By setting the metal coverage to 0.2% or more, the line width of the metal wiring part 242 described above can be set within a preferable range. By setting the metal coverage to 5.0% or less, the metal wiring portion 242 does not hinder the transparency of the snow melting mechanism according to the present embodiment, and therefore, the other side of the snow melting mechanism ( The opposite side) can be made visible. Note that, specifically, the transparent resin layer of the insulating buffer layer 241 preferably has a haze value of 1% or more and 10% or less of the insulating buffer layer 241. When the haze value of the insulating buffer layer 241 is 1% or more and 10% or less, a snow melting mechanism having transparency to the extent that light emission of the LED element can be sufficiently visually recognized can be obtained. The haze value can be measured by, for example, a haze meter (HM-150 compatible with ASTM D-1003, manufactured by Murakami Color Research Laboratory Co., Ltd.). Next, the insulating buffer layer 243 constituting the snow melting mechanism according to this embodiment will be described.

(Insulation buffer layer)
In the snow melting mechanism according to the present invention, an insulating buffer layer 243 made of resin is preferably laminated on the resin base material 241b and the metal wiring part 242. The insulating buffer layer 243 according to the present embodiment can be exemplified, for example, as including 60% or more of a low density polyethylene resin having a density of 0.940 g / cm ³ or less in the total resin components. By using a resin that contains 60% or more of the low-density polyethylene resin among all the resin components, it is possible to impart good flexibility while maintaining the sheet processability of the insulating buffer layer 243. Therefore, the embedding property of the metal wiring part 242 arranged in contact with the insulating buffer layer 243 can be increased, and moisture can be prevented from entering from the end face.

  Moreover, since low density polyethylene (LDPE) is low density, crystallinity itself is low. For this reason, it is excellent in transparency when processed into a sheet shape. Therefore, it is preferable to use low density polyethylene (LDPE) for the insulating buffer layer 243 also from the viewpoint of design.

  The thermal conductivity of the insulating buffer layer 243 according to this embodiment is preferably 0.1 W / m · K or more and 0.5 W / m · K or less, preferably 0.15 W / m · K or more and 0.3 W / m · K. More preferably, it is as follows. By setting the thermal conductivity of the insulating buffer layer 243 to 0.1 W / m · K or more, the heat generated from the metal wiring portion 242 can be efficiently transmitted to the surface of the snow melting mechanism 24. Therefore, it is possible to prevent snow on the outermost surface on the information display surface side of the LED information display panel with a snow melting function with less power consumption, or to melt snow that has snowed on the outermost surface on the information display surface side. . By setting the thermal conductivity of the insulating buffer layer 243 to 0.5 W / m · K or less, the heat generated from the metal wiring portion is not released to the outside, and the LED information display panel 100 with the snow melting function is on the information display surface side. Can transfer heat to the surface. The thermal conductivity can be measured by a laser flash method based on, for example, JIS R 1611.

  The thickness of the insulating buffer layer 243 according to the present embodiment is preferably 50 μm or more and 500 μm or less, and more preferably 100 μm or more and 300 μm or less. The durability of the snow melting mechanism 24 can be improved by setting the thickness of the insulating buffer layer 243 to 50 μm or more. By setting the film thickness of the snow melting mechanism 24 to 500 μm or less, it is possible to prevent snow accumulation on the outermost surface on the information display surface side of the LED information display panel with a snow melting function or to prevent the outermost surface on the information display surface side with less power consumption It can melt the snow that snowed.

(Other ingredients)
The insulating buffer layer 243 according to the present embodiment can further contain other components. For example, components such as a weather resistance masterbatch for imparting weather resistance to the insulating buffer layer 243 according to the present embodiment, various fillers, a crosslinking agent, a crosslinking aid, a light stabilizer, an ultraviolet absorber, and a heat stabilizer are included. Illustrated. These contents vary depending on the particle shape, density, and the like, but are preferably in the range of 0.001% by mass to 5% by mass in the total resin components of the insulating buffer layer 243, respectively. By including these additives, the snow melting mechanism 24 according to the present embodiment can be provided with a stable mechanical strength over a long period of time, an effect of preventing yellowing, cracking, and the like.

(Method for manufacturing snow melting mechanism)
The snow melting mechanism 24 can be manufactured, for example, by the following method. First, the metal plate and the resin base material 241b are laminated via an adhesive, and the metal wiring part 242 is formed from the metal plate by etching, whereby the resin base material 241b on which the metal wiring part 242 is formed is manufactured. Thereafter, the members composed of the resin base material 241a, the insulating buffer layer 243, and the resin base material 241b on which the metal wiring part 242 is formed are sequentially laminated and then integrated by vacuum suction or the like, and then, by a molding method such as a lamination method, The snow melting mechanism 24 can be manufactured by thermocompression-bonding the above-described member as an integrally formed body.

[Substrate for LED element]
The LED element substrate 1 is a member for internal wiring in which a metal wiring portion (not shown) for mounting the LED element 3 on the support substrate 11 is formed. The metal wiring part is formed at least on the information display surface side of the support substrate 11. When a so-called dot matrix display device is configured, a multilayer metal wiring part as described in Patent Document 1 is generally configured. Is done.

  The LED element substrate 1 covers the surface of the support substrate 11 and the surface of the metal wiring part except for the LED mounting region (hereinafter referred to as “LED non-mounting region”), It is preferable that a spacer 12 that can protect the LED element from an external impact is formed.

  In particular, when the LED information display panel is a dot matrix display device, a black layer 13 for improving contrast is preferably formed on the outermost surface of the LED non-mounting region in the LED mounting module 10. The black layer 13 may be one in which the surface of the spacer 12 is colored with a black pigment or the like, or a base material including a resin containing the pigment, and in the LED element mounting region, similar to the spacer described above. The base material in which through holes are formed in the corresponding portions may be separately laminated on the upper surface of the spacer 12.

  The supporting substrate 11 constituting the LED element substrate 1 is preferably a flexible substrate made of a resin film or the like and having flexibility. By using the support substrate 11 as a flexible substrate, the LED information display panel can be installed following the curved surface even when the installation location is a wall surface including a curved surface. In addition, by using a flexible substrate as the support substrate, it is possible to greatly reduce the risk of scratching or breaking the accommodation sheet due to contact with the LED mounting module. However, the present invention is not limited thereto, and the support substrate 11 may be an LED element substrate having a certain rigidity such as a rigid substrate.

  Preferred examples of the material resin for the flexible substrate include polyimide (PI), polyethylene naphthalate (PEN), amorphous polyarylate, polysulfone, polyethersulfone, polyphenylene sulfide, polyetheretherketone, polyetherimide, and fluororesin. And liquid crystal polymers. Among these, polyethylene naphthalate (PEN) whose heat resistance and dimensional stability are improved by performing a heat resistance improvement treatment such as an annealing treatment can be particularly preferably used. In addition, polyethylene terephthalate (PET) whose flame retardancy is improved by addition of a flame retardant inorganic filler or the like can also be selected as a material resin for the resin base. As described above, the support substrate 11 may be made of a material having rigidity, such as wood, metal, or ceramic.

  The film thickness of the flexible support substrate is not particularly limited, but is 30 μm or more and 200 μm or less, preferably 50 μm or more and 125 μm or less from the viewpoint of heat resistance and insulating properties and the balance of manufacturing cost. It is preferable. Also, the thickness is preferably within the above-mentioned thickness range from the viewpoint of maintaining good productivity when manufacturing by the roll-to-roll method.

  The arrangement of the metal wiring portion formed on the support substrate 11 is not limited to a specific arrangement as long as the LED elements 3 can be mounted in a matrix at a desired pitch, and a conventionally known LED element substrate. Arbitrary arrangements including the same arrangement can be adopted. Examples of the metal used as the material of the metal wiring part include metal foils such as aluminum, gold, silver, and copper.

  The LED element 3 constituting the LED mounting module 10 by being mounted on the LED element substrate 1 is a light emitting element utilizing light emission at a PN junction where a P-type semiconductor and an N-type semiconductor are joined. There are proposed a structure in which a P-type electrode and an N-type electrode are provided on the upper and lower surfaces of the element and a structure in which both the P-type and N-type electrodes are provided on one side of the element. The LED element 3 can be preferably bonded to the metal wiring portion of the LED element substrate 1 by solder bonding. This solder bonding can be performed by a reflow method or a laser method.

  In the LED information display panel 100 with a snow melting function, it is preferable that a back-side reinforcing plate 14 is further laminated on the back side of the support substrate in addition to the above members. As the back side reinforcing plate 14, for example, a sheet or panel made of polycarbonate, acrylic, aluminum, or the like can be preferably used.

  In addition, in the LED information display panel 100 with a snow melting function, a diffusion plate 15 may be further disposed in any layer above the light emitting surface of the LED element, if necessary. The diffuser plate 15 has a function of uniformly diffusing emitted light from the LED element 3 serving as a light source and reducing variations in luminance. Any conventionally known various optical films can be used without particular limitation as long as they have optical characteristics that impart a diffusing action to incident light. For example, an optical film or the like in which a minute and random lens array is formed on the entire surface in order to exert a light diffusing function on a translucent resin film made of polycarbonate, acrylic resin or the like is a specific example of the diffusing plate 15. Can be mentioned.

[Containment sheet]
The accommodation sheet 2 can stably accommodate one or a plurality of LED mounting modules 10 connected to each other, and the LED mounting module accommodated therein during use of the LED information display panel 100 with a snow melting function. 10 is a storage sheet that protects 10. The housing sheet 2 uses two resin sheets as the display surface side resin sheet 21 and the back surface side resin sheet 22 respectively, and superimposes them, so that one or a plurality of LED mounting modules 10 are stably placed between the two sheets. It forms by sealing the other part in the aspect which can hold | maintain LED mounting module 10 stably, forming the LED accommodating part which is the space which can be accommodated.

  The LED housing portion is a region where the display surface side resin sheet 21 and the back surface side resin sheet 22 are regions other than those necessary for housing the LED mounting module 10, in order to house the LED mounting module 10. In a region including a connecting portion formed between necessary regions, a sealing portion is formed in close contact with each other, thereby forming a bag-shaped cavity portion surrounded by the sealing portion. In addition, as above-mentioned, the connection part of the storage sheet 2 becomes a sealing part which seals the LED mounting module 10 by the display surface side resin sheet 21 and the back side resin sheet 22 being closely_contact | adhered in the storage sheet 2. FIG. In particular, the sealing portion formed between the plurality of LED mounting modules 10 is a portion that can be folded when folded.

  As shown in FIG. 4, in the display surface side resin sheet 21, an area surrounding at least a matrix area where the LED elements 3 are mounted, that is, an area on an area where information is displayed by turning on the LED elements is a display surface. Although it is good also as an opening area | region where the side resin sheet 21 does not exist, it is preferable to form the said area | region part of the display surface side resin sheet 21 with the transparent film 211 with high light transmittance. Or in the part on this information display area, it may replace with the display surface side resin sheet 21, and may arrange | position a separate transparent member alternatively.

  As the resin sheet constituting the storage sheet 2, a known resin sheet made of soft plastic such as vinyl chloride, acrylic, styrene, or the like can be appropriately used. However, in the LED information display panel 100 with a snow melting function of the present invention, it is particularly preferable to use vinyl chloride from the viewpoint that the curvature radius of the bent portion at the time of folding can be easily made sufficiently small. In addition, in order to provide the other desired physical property as needed, the accommodation sheet 2 may be coated or colored.

<LED information display device>
By connecting the LED information display panel 100 with a snow melting function described above to the external operation base 7, the LED information display device 200 including the LED information display panel 100 with a snow melting function as an information display unit can be obtained.

  The LED information display device 200 is configured such that the LED information display panel 100 with a snow melting function is self-supported by various auxiliary devices (not shown) as needed, or is attached to the surface of the wall of the installation location. It is practically used.

  The external operation base 7 is a component / device having a function of controlling the lighting timing, lighting time, etc. individually for each LED element 3 mounted on each LED mounting module 10. For example, timing control Can be realized as an executable program such as a ROM on which a program is executed as a program, a substrate on which the algorithm is mounted as an IC chip, and the like. The overall control unit can be provided at the end as a system separate from the connecting portion of the LED mounting module, for example, depending on the convenience of use, but the arrangement position is not particularly limited.

  As described above, the LED information display panel with a snow melting function of the present invention prevents snow on the outermost surface on the information display surface side of the LED information display panel with a snow melting function, or the outermost surface on the information display surface side or the like. Decreased visibility of information displayed on the LED information display panel due to dirt caused by water droplets attached to the outermost surface on the information display surface side of the LED information display panel, which can melt snow that has landed Can be reduced.

DESCRIPTION OF SYMBOLS 1 LED element board | substrate 2 Accommodating sheet 21 Display surface side resin sheet 211 Transparent film 22 Back side resin sheet 23 Outer peripheral part 24 Snow melting mechanism 241a Resin base material 241b Resin base material 242 Metal wiring part 243 Insulation buffer layer 244 Adhesive layer 25 Water repellent Layer 26 Adhesive layer 3 LED element 4 Wiring 5 Relay base 6 Driver 7 External operation base 10 LED mounting module 11 Support substrate 12 Spacer 13 Black layer 14 Back side reinforcing plate 15 Diffusion plate 16 LED information display section 100 LED information display with snow melting function Panel 200 LED information display device

Claims (4)

An LED mounting module in which an LED element is mounted on an LED element substrate;
A snow melting mechanism in which a metal wiring part is formed on the surface of a resin base material ;
An LED information display panel with a snow melting function comprising:
The outermost surface of the L ED information display surface, the contact angle of water of 90 degrees or more of the water-repellent layer,
An insulating buffer layer, wherein a low density polyethylene resin having a density of 0.940 g / cm ³ or less is contained in 60% or more of all the resin components, and is laminated on the metal wiring part and the resin substrate;
LED information display panel with snow melting function.   The LED information display panel with a snow melting function according to claim 1, wherein the water repellent layer is a fluorine-based resin.   The LED information display panel with a snow melting function according to claim 1, wherein the water repellent layer is a fluorine resin film.   4. The LED information display panel with a snow melting function according to claim 1, wherein the snow melting mechanism is disposed on the LED mounting module on the LED information display surface side.