JP2017146371A - Led display panel and led information display unit using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED display panel capable of preventing infiltration of water into an LED packaging module.SOLUTION: An LED display panel 100 includes: an LED packaging module 10; an LED packaging module reinforcement member 11 allowing the LED packaging module 10 to be placed on a surface thereof; and a plate-like LED element protective member 22 placed on a support substrate 21 of the LED packaging module 10. In the LED display panel 100, the LED element protective member 22 has a through hole 223 in a packaging area of an LED element 3 to be packaged to the LED packaging module 10 in a planar view of the LED packaging module 10. The LED element protective member 22 includes, on a surface at a side where the LED packaging module reinforcement member 11 is arranged, a thickness enlargement part 222 formed circumferentially from an end of the LED element protective member 22. The thickness enlargement part 222 and the LED packaging module reinforcement member 11 are adhered interposing an adhesion layer 24.SELECTED DRAWING: Figure 4

Description

  The present invention mainly relates to an LED display panel and an LED information display device using the same.

  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 that 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).

JP 2008-218674 A JP 2011-40570 A

  In the LED information display device described in Patent Document 1, a plurality of LED mounting modules are accommodated in a cover sheet (accommodating sheet) made of a sheet made of resin or the like so as to be connected in one direction. And the part used as the connection part between each said mounting LED mounting modules is a foldable part among this accommodation sheet | seats, The structure which can be folded up compactly by bend | folding this part at the time of conveyance have.

  However, the accommodating sheet and the LED mounting module may be peeled off due to repeated folding at the foldable portion (joint portion). When the LED information display device is installed outdoors and the storage sheet and the LED mounting module are peeled off, water may infiltrate into the LED mounting module from the place where the storage sheet and the LED mounting module are peeled off due to rain or the like. In particular, such a folding type LED information display device has been a problem.

  An object of this invention is to provide the LED display panel which can suppress the penetration | invasion of the water to the inside of an LED mounting module.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive studies. As a result, the surface of the LED-mounting module reinforcing member on the side of the plate-shaped LED element protection member in which a through hole is formed in the mounting area of the LED element. The present invention has been completed by finding that the above problem can be solved if the LED display panel has an enlarged thickness portion. Specifically, the present invention provides the following.

  (1) LED mounting module, LED mounting module reinforcing member having at least a mounting surface on which the LED mounting module can be mounted, and a plate-like LED disposed on a support substrate of the LED mounting module An LED display panel comprising an element protection member, wherein the LED element protection member has a through-hole formed in a mounting region of the LED element mounted on the LED mounting module in a plan view of the LED mounting module, On the surface of the LED element protection member on the arrangement side of the LED mounting module reinforcing member, the LED element protection member is formed in a circumferential shape from the end of the LED element protection member so as to be thicker than the portion other than the end of the LED element protection member. Thickness increasing portion is formed, and the thickness increasing portion and the LED mounting module reinforcing member are bonded via an adhesive layer. And it has LED display panel.

  According to the invention of (1), since the thickened portion and the LED mounting module reinforcing member are bonded via the adhesive layer, the intrusion of water into the LED mounting module can be suppressed.

  (2) The LED mounting module is accommodated between the front side sheet and the back side sheet, the LED mounting module reinforcing member is disposed on the back side sheet, and the LED element protection member is The LED display panel according to (1), which is a spacer disposed between the front side sheet and the support substrate of the LED mounting module.

  According to the invention of (2), since the LED mounting module is accommodated between the front side sheet and the back side sheet, the LED mounting module is protected and the adhesive layer is not exposed to the outside air. Furthermore, it is possible to suppress the intrusion of water into the LED mounting module.

  (3) The LED display panel according to (2), further comprising a foldable connecting portion in which the top sheet and the back sheet are in close contact.

  According to the invention of (3), in addition to the effect of the invention of (2), since the foldable connecting part is provided, the unit parts including the LED mounting module can be folded in a stacked manner.

(4) The LED mounting module reinforcing member includes a side wall,
The inner surface which is a surface on the side facing the LED mounting module of the side wall portion and the LED mounting module are bonded to each other through an adhesive layer (1) to (3). LED display panel.

  According to the invention of (4), in addition to the effects of any one of the inventions of (1) to (3), the LED mounting module reinforcing member is a reinforcing member having a side wall portion. Strength) can be improved.

  (5) The LED display panel according to any one of (1) to (4), wherein the adhesive layer is a resin layer containing a resin having a functional group having silicon.

  According to the invention of (5), in addition to the effect of any of the inventions of (1) to (4), the adhesive layer is a resin layer containing a resin having a functional group having silicon, so that the LED mounting is further performed. Intrusion of water into the module can be more effectively suppressed.

  (6) The storage elastic modulus, which is the maximum value of the tan δ peak temperature in the temperature-tan δ curve, measured based on JIS K7244-1 in the LED element protection member and the LED mounting module reinforcing member is 50 MPa or more. Item 6. The LED display panel according to any one of Items 1 to 5.

  According to the invention of (6), in addition to the effects of any of the inventions of (1) to (5), an LED mounting module reinforcing member made of a highly rigid material having a storage elastic modulus of 50 MPa or more can be obtained. For this reason, it is possible to further effectively prevent water from entering the LED mounting module.

  (7) An LED information display device comprising the LED display panel according to any one of (1) to (6) as an information display unit.

  According to invention of (7), it can be set as the LED information display apparatus which has the effect in any one of (1) to (6).

  The LED display panel of the present invention is an LED display panel that can suppress the ingress of water into the LED mounting module.

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 display panel of this invention. It is the elements on larger scale of the LED display panel of this invention. It is sectional drawing which shows typically the cross section in the AA of the LED display panel of FIG. It is sectional drawing which shows typically the cross section of the LED display panel which cannot suppress the penetration | invasion of the water to the inside of an LED mounting module. It is sectional drawing which shows typically the cross section of the LED display panel in which the clearance gap D generate | occur | produced in sectional drawing in the AA of the LED display panel of FIG. It is a perspective view with which it uses for description of how to fold the LED display panel of this invention. It is a perspective view which shows the state by which the LED display panel of this invention was folded. It is sectional drawing which shows typically the cross section of the LED display panel of other embodiment of this invention.

  Hereinafter, the LED display panel of the present invention will be described, and then the preferred first embodiment and second embodiment of the LED display panel of the present invention and the LED information display device using the LED display panel 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 display panel>
The LED display panel of the present invention is disposed on an LED mounting module 10, an LED mounting module reinforcing member 11 having at least a mounting surface on which the LED mounting module 10 can be mounted, and a support substrate 21 of the LED mounting module 10. A plate-like LED element protection member 22. The LED element protection member 22 is formed with a through hole 223 in the mounting area of the LED element mounted on the LED mounting module in plan view of the LED mounting module. The LED element protection member 22 is a member that protects the LED element by being disposed on the support substrate. In addition, in the case of the LED display panel of the present invention provided with a storage sheet, it has a role as a spacer disposed between the surface side sheet and the support substrate.

  Furthermore, a thickened portion 222 is formed on the surface of the LED element protection member 22 on the side where the LED mounting module reinforcing member 11 is disposed, in a circumferential shape from the end of the LED element protection member 22. The thickened portion refers to a part of the surface of the LED element protection member 22 that is formed so that the thickness is larger than the portion other than the end of the LED element protection member 22. And the thickness expansion part 222 and the LED mounting module reinforcement member 11 are adhere | attached through the contact bonding layer 24. FIG. Thereby, permeation of water into the LED mounting module can be suppressed. In addition, if "the thickness expansion part and the LED mounting module reinforcement member are adhere | attached via an contact bonding layer", if there exists an effect of this invention, arrangement | positioning of the LED mounting module reinforcement member 11 of a thickness expansion part will be carried out. The surface on the side and the LED mounting module reinforcing member are not limited to the mode of being bonded via the adhesive layer 24. For example, the outer wall 222a of the enlarged thickness portion and the LED mounting module reinforcing member are bonded via the adhesive layer. It is a concept including an aspect and an aspect in which the inner wall 222b of the thickness enlarged portion and the LED mounting module reinforcing member 11 are bonded via an adhesive layer. Moreover, as long as it is a range with the effect of this invention that the thickness expansion part is formed in the periphery shape in this specification, it is a part other than the edge of the LED element protection member of the surface at the side of arrangement | positioning of an LED element protection member It is a concept that includes both the case where the thickened portion is formed seamlessly so as to surround and the case where the thickened portion is partially chipped and the thickened portion is intermittently formed.

  Moreover, it is preferable that the LED display panel of the present invention includes a front side sheet 12 and a back side sheet 13 that house the LED mounting module 10. By housing the LED mounting module 10 between the front surface side sheet 12 and the back surface side sheet 13, the LED mounting module 10 can be protected. Furthermore, since the adhesive layer 24 is not exposed to the outside air by accommodating the LED mounting module 10, it is possible to further prevent water from entering the LED mounting module.

  Furthermore, it is preferable that the LED display panel of this invention provided with the surface side sheet | seat 12 and the back surface side sheet | seat 13 is equipped with the foldable connection part which the surface side sheet | seat 12 and the back surface side sheet | seat 13 closely_contact | adhere. . By providing the foldable connecting part, the unit parts including the LED mounting module can be folded in a stacked manner. The LED display panel of the present invention is particularly useful in an LED display panel having a foldable connecting portion. The reason why the configuration of the present invention is particularly useful in an LED display panel having a foldable connecting portion will be described later.

  Hereinafter, preferred embodiments of the present invention will be described. The present invention is not limited to the following embodiments.

<First embodiment of LED display panel>
As shown in FIG. 1, the LED display panel 100 according to an embodiment of the present invention 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 front surface side sheet 12 and the back surface side sheet 13 constituting the accommodation sheet 14. Hereinafter, an LED display panel 100 in which a plurality of LED mounting modules 10 are linearly connected in one direction will be described as a typical embodiment of the present invention. Those arranged in both the X and Y directions and connected in a matrix are also within the scope of the present invention as long as they satisfy other essential constituent requirements.

  In the LED display panel 100, as shown in FIG. 2, each LED mounting module 10 is accommodated in the accommodation sheet 14 individually in a straight line at a predetermined interval. Each LED mounting module 10 is electrically connected to an internal control unit including the relay base 5 and the driver 6 by a flexible wiring 4 embedded in the accommodation sheet 14.

  The LED display panel 100 further constitutes an LED information display device 200 by being connected to necessary equipment in addition to the external operation base 7 as necessary. The LED information display device 200 is mainly used outdoors by allowing the LED display panel 100 to stand on its own by various auxiliary devices (not shown) as needed, or by installing it on the wall surface of the installation site. It is used as an information display device installed non-constantly.

  As shown in FIGS. 7A and 7B, the LED display panel 100 has a structure that can be folded in a stacked state for each unit portion including the individual LED mounting modules 10 at the time of transportation or storage. The folding method is not limited to a specific folding method except that it is the above-described mode. However, when the LED display panel 100 connects three or more LED mounting modules, it can be folded into ninety-nine folds. It is preferable to have a structure that can be formed. Ninety-nine folds refers to a structure in which a plurality of face pieces are connected to each other, and the adjacent face faces are folded so that the front surface-front surface and the back surface-back surface overlap in order.

<Waterproof reinforcement structure>
The waterproof reinforcement structure is a reinforcement structure having a function of improving the waterproofness of the LED display panel. As shown in FIG. 4, the storage sheet 14 including the front side sheet 12 and the back side sheet 13, and LED element protection In this structure, the member 22 and the LED mounting module reinforcing member 11 are provided.

  The accommodation sheet 14 can accommodate the LED mounting module 10 between the front surface side sheet 12 and the rear surface side sheet 13, and the foldable connecting portion 15 formed by the front surface side sheet 12 and the rear surface side sheet 13 being in close contact with each other. Is provided. The accommodation sheet 14 can stably accommodate the plurality of LED mounting modules 10. In addition, since the accommodation sheet 14 is composed of two flexible sheets, that is, a front side sheet 12 and a back side sheet 13 as will be described later, in the connecting portion 15 where the two sheets are in close contact with each other. Can be folded. The accommodation sheet 14 relating to the present embodiment will be described later.

[LED element protection member]
The LED element protection member 22 according to the present embodiment has a through hole 223 formed in the mounting region of the LED element 3 mounted on the LED mounting module 10 in a plan view of the LED mounting module 10, and the surface side sheet 12 and the LED mounting By being disposed between the module 10 and the support substrate 21, the module 10 functions as a spacer. Further, the surface of the LED element protection member 22 on the arrangement side of the LED mounting module reinforcing member 11 is disposed on the surface of the LED element protection member 22 on the arrangement side of the LED mounting module reinforcement member 11 from the end of the LED element protection member 22. A thickened portion 222 is formed in a circumferential shape. And the thickness expansion part 222 and the LED mounting module reinforcement member 11 arrange | positioned on the back surface side sheet | seat 13 are adhere | attached through the contact bonding layer 24. FIG. The LED element protection member 22 and the LED mounting module reinforcing member 11 have a function of protecting the LED element 3 and the LED mounting module 10 from an external impact, and also have a function of suppressing water from entering the LED mounting module 10. .

  The reason why water intrudes into the LED mounting module of the LED display panel 100B having the plate-like LED element protection member 22B without the thickness increasing portion as shown in FIG. 5 will be described. When the connecting portion 15 of the storage sheet 14 is bent in order to fold the LED display panel 100B, the storage sheet 14 is a flexible sheet whose shape changes. The stress is applied in the direction in which the front surface sheet 121 of 14 peels from the LED mounting module. And the surface side sheet | seat 121 of the accommodation sheet | seat 14 peels with the stress, and the clearance gap D generate | occur | produces. When the gap D occurs, rain or the like enters the gap D, and water enters the LED mounting module from between the support substrate 21 of the LED element substrate 1B and the LED element protection member 22B.

  Therefore, in the LED display panel 100 of the present embodiment, as shown in FIG. 6, the thickness enlargement portion 222 is formed on the surface of the LED element protection member on the side where the LED mounting module reinforcing member 11 is arranged, and the thickness enlargement portion. 222 and the LED mounting module reinforcing member 11 are bonded via an adhesive layer 24. The LED element protection member 22 and the LED mounting module reinforcing member 11 have rigidity unlike the flexible surface side sheet 121. Therefore, the shape of the LED element protection member 22 and the LED mounting module reinforcing member 11 does not change due to the bending of the connecting portion 15 of the accommodation sheet 14. Therefore, no stress is applied to the adhesive layer 24 due to the bending of the connecting portion 15 of the housing sheet 14, and the thickness enlarged portion 222 of the LED element protection member 22 and the LED mounting module reinforcing member 11 are not bent by the bending of the housing sheet 14. Does not peel. Further, even if the surface side sheet 121 is peeled off from the LED mounting module 10 as shown in FIG. 6 due to the bending of the connecting portion 15 of the accommodation sheet 14, the thickness enlarged portion 222 and the LED mounting module reinforcing member 11 Can be prevented from entering the LED mounting module 10 from between the support substrate 21 and the LED element protection member 22. Therefore, if it is the LED display panel 100 provided with the waterproof reinforcement structure regarding this embodiment, the penetration | invasion of the water to the inside of the LED mounting module 10 can be suppressed. As described above, the LED display panel of the present invention is a foldable structure in which the LED mounting module is accommodated between the front side sheet and the back side sheet, which are accommodation sheets, and the front side sheet and the back side sheet are in close contact with each other. This is particularly useful when the LED display panel is provided with possible connecting portions. In addition, in this embodiment and the following second embodiment, “having rigidity” means having rigidity so that the shape hardly changes due to bending of the connecting portion 15 of the storage sheet.

  The waterproof reinforcement structure according to this embodiment includes a thickness expansion portion 222 on the surface of the LED element protection member 22 on the side where the LED mounting module reinforcement member 11 is disposed, and the thickness expansion portion 222 and the LED mounting module reinforcement member 11 are bonded to each other. 24 has a great feature in that it is possible to suppress the intrusion of water into the LED mounting module 10 by an extremely simple structure such as being bonded via 24.

  In addition, in the LED display panel provided with the waterproof reinforcement structure according to the present embodiment, if the adhesive layer has the effect of the present invention, the surface on the arrangement side of the LED mounting module reinforcing member 11 of the thickness enlarged portion and the LED The embodiment is not limited to the mode in which the mounting module reinforcing member is bonded via the adhesive layer 24, for example, the mode in which the outer wall 222a of the thickness enlarged portion and the LED mounting module reinforcing member are bonded via the adhesive layer 24, and The aspect by which the inner wall 222b of the thickness expansion part and the LED mounting module reinforcement member 11 are adhere | attached via the contact bonding layer 24 may be sufficient.

  In the conventional LED display panel, in order to prevent the surface side sheet of the storage sheet from being peeled off, it has been necessary to perform it by welder welding or the like for welding the sheets together. However, if it is an LED display panel provided with the waterproof reinforcement structure regarding this embodiment, it is possible to ensure waterproofness by the shape of the LED element protection member and the LED mounting module reinforcement member. Therefore, the sheets can be bonded by a simpler method rather than by a method such as welder welding, and productivity is extremely high.

  The thickness enlarged portion 222 of the LED element protection member 22 according to the present embodiment is preferably formed in an area of 10.0 mm or more from the end of the LED element protection member 22, and 20.0 mm from the end of the LED element protection member 22. More preferably, it is formed in the above region. The thickened portion 222 is formed in an area of 10.0 mm or more from the end of the LED element protection member 22, and thus can more effectively suppress water from entering the LED mounting module 10. In addition, although there is no restriction | limiting in particular about a minimum, It is preferable to form in the area | region of 50.0 mm or less from the edge of the LED element protection member 22 from a viewpoint of ensuring the area of the information display part of an LED display panel.

  Moreover, it is preferable that the thickness expansion part 222 of the LED element protection member 22 regarding this embodiment is 0.2 mm or more thicker than the thickness of the area other than the thickness expansion part, and is larger than the thickness of the area other than the thickness expansion part. More preferably, the thickness is 0.5 mm or more. By being 0.2 mm or more thicker than the thickness of the region other than the thickened portion, water intrusion into the LED mounting module 10 can be more effectively suppressed. It should be noted that the thickness of the region 221 other than the thickened portion can be appropriately changed and selected depending on the material and the like. For example, when using polycarbonate as the LED element protection member 22 according to the present embodiment, it is preferably 1.0 mm or more and 5.0 mm or less, and more preferably 2.0 mm or more and 4.0 mm or less.

  The method of forming the thickness enlarged portion 222 of the LED element protection member 22 relating to the present embodiment is not particularly limited. For example, the portion other than the end of the surface of the LED element protection member 22 on the side where the LED mounting module reinforcing member 11 is disposed is cut to make the portion other than the end thinner than the end portion of the LED element protection member 22. The protective member 22 can be formed by making the end portion relatively thick. For example, when a polycarbonate resin or an acrylic resin is used as the material of the LED element protection member 22, the plate-shaped LED element protection member 22 is cut off at a portion other than the end of the surface on the LED mounting module reinforcing member 11 arrangement side. It can be realized by using an NC milling machine or the like.

  The material of the LED element protection member 22 according to the present embodiment is not particularly limited as long as the material has a rigidity that does not substantially change the shape due to the bending of the connecting portion 15 of the housing sheet. For example, based on JIS K7244-1 A material having a storage elastic modulus of 50 MPa or more, preferably a storage elastic modulus of 70 MPa, which is the maximum value of the tan δ peak temperature in the temperature-tan δ curve measured in the above. Specific examples of the material include polycarbonate resin, acrylic resin, aluminum, gold, silver, stainless steel, copper, chromium, zinc, tin and other metals, alloys thereof, ceramics, and the like. It is particularly preferable to use a polycarbonate resin or an acrylic resin from the viewpoints of high rigidity, ease of processing, lightness, and low cost.

<LED mounting module reinforcement member>
The LED mounting module reinforcing member 11 relating to the present embodiment is a rigidity that can be placed on the LED mounting module 10 and is disposed below the LED element protection member 22 and on the back surface side sheet 13. It is the reinforcement part which has. The LED mounting module reinforcing member 11 has a function of reinforcing the LED mounting module 10 as described above, and a function of suppressing water from entering the LED mounting module 10.

  The shape of the LED mounting module reinforcing member according to the present invention has at least a mounting surface on which the LED mounting module can be mounted on the surface, and if the above waterproof function can be exhibited, the LED mounting of the embodiment of FIG. The module reinforcing member 11 may have a flat plate shape. Further, like the LED mounting module reinforcing member 11A of the embodiment of FIG. The LED mounting module reinforcing member 11A of the embodiment of FIG. 8 will be described later.

  The material of the LED mounting module reinforcing member 11 relating to the present embodiment is not particularly limited as long as it is a material having such a rigidity that the shape hardly changes due to the bending of the connecting portion 15 of the accommodation sheet. For example, JIS K7244-1 Examples thereof include a material having a storage elastic modulus of 50 MPa or more, preferably a storage elastic modulus of 70 MPa or more, which is the maximum value of the tan δ peak temperature in the temperature-tan δ curve measured based on the above. Specific examples of the material include polycarbonate resin, acrylic resin, aluminum, gold, silver, stainless steel, copper, chromium, zinc, tin and other metals, alloys thereof, ceramics, and the like. It is particularly preferable to use aluminum from the viewpoints of high rigidity, ease of processing, lightness, and low cost.

  The thickness of the LED mounting module reinforcing member 11 according to the present embodiment is not particularly limited as long as the thickness can maintain the rigidity. The thickness of the LED mounting module reinforcing member 11 according to the present embodiment can be selected by appropriately changing depending on the material and the like. For example, when using aluminum as the LED mounting module reinforcing member 11 according to the present embodiment, it is preferably 0.1 mm or more and 1.0 mm or less, and more preferably 0.4 mm or more and 0.6 mm or less.

<Second Embodiment of LED Display Panel>
An LED display panel 100A according to a second embodiment of the present invention will be described with reference to FIG. The LED mounting module reinforcing member 11 </ b> A in the LED display panel of the embodiment of FIG. 8 has a shape including the side wall portion 112. The side wall portion 112 is a part of the LED mounting module reinforcing member 11A that is formed in a wall shape so as to stand upright from the outer periphery of the mounting surface 111a. When the shape of the rigid LED mounting module reinforcing member 11A is such that the side wall portion 112 is provided, the rigidity (strength) of the LED mounting module itself can be further improved. In addition, although the bottom face part 111 and the side wall part 112 are clearly described using dotted lines in FIG. 8 for the explanation of the present invention, the bottom face part 111 and the side wall part 112 are respectively separate members. It does not mean that the bottom surface portion 111 and the side wall portion 112 are each a part of the LED mounting module reinforcing member 11. As will be described later, the LED mounting module reinforcing member 11A is not only an LED mounting module reinforcing member formed by bonding two or more plates, but also a single material formed by bending an end portion. An integrated LED mounting module reinforcing member can also be exemplified.

  Further, the inner surface of the side wall 112 facing the LED mounting module 10 and the LED mounting module 10 are bonded to each other through the adhesive layer 24A, so that the accommodation sheet 14 is connected. The shape of the LED mounting module reinforcing member 11 </ b> A may not be changed by the bending of the portion 15. Accordingly, the adhesive layer 24A is not stressed by the bending of the connecting portion 15 of the housing sheet 14, and the LED mounting module 10 and the side wall portion 112 of the LED mounting module reinforcing member 11 are not peeled by the bending of the housing sheet 14. . Therefore, if it is LED mounting module reinforcement member 11A provided with the side wall part 112 regarding this embodiment, the penetration | invasion of the water to the inside of LED mounting module 10 of an LED display panel can be suppressed.

  In addition, the method to form the side wall part 112 of the LED mounting module reinforcement member 11 regarding this embodiment is not specifically limited. For example, a method in which two or more plates are bonded (a method in which a plate made of the same or different material as the plate is bonded to the side surface of the plate or near the inner end of one surface of the plate). There may be. Further, when the plate is a metal plate made of metal, the side wall portion 112 may be formed by bending the end portion of the metal plate. Forming by bending the end of the metal plate is preferable from the viewpoint that the side wall 112 can be easily formed.

  Moreover, even if compared with the LED display panel 100 of embodiment of FIG. 4, the penetration | invasion of the water to the inside of the LED mounting module 10 can be suppressed still more effectively. Since the shape of the LED mounting module reinforcing member 11A includes the side wall portion 112, the outer wall 222a of the enlarged portion of the LED element protection member, the inner surface of the side wall portion 112 of the LED mounting module reinforcing member 11A, However, if it is configured to be bonded via an adhesive layer (see FIG. 8), the area where the adhesive layer is laminated can be increased. Therefore, it becomes possible to adhere | attach the LED element protection member 22 and the LED mounting module reinforcement member 11 more firmly, and it can suppress the penetration | invasion of the water into the LED mounting module 10 still more effectively.

  In addition, if it is LED display panel 100A of this embodiment, the area | region in which the thickness expansion part of 11 A of LED mounting module reinforcement members is formed can further be reduced rather than LED display panel 100 of embodiment of FIG. Specifically, the thickened portion only needs to be formed in an area of 1.0 mm or more from the end of the LED element protection member, and may be formed in an area of 2.0 mm or more from the end of the LED element protection member. preferable.

  In addition, when a metal such as aluminum is used as the LED mounting module reinforcing member 11A, the outer wall side surface of the side wall portion is compared with a case where an LED mounting module and a surface side sheet that are not flat like the conventional LED display panel are bonded. And the surface side sheet are easily bonded. For this reason, the selectivity of the adhesive which adhere | attaches the outer wall side surface of a side wall part and a surface side sheet | seat improves, and productivity is very high.

  In addition, a metal such as aluminum has gloss unlike a resin or the like. Therefore, when a metal such as aluminum is used as the LED mounting module reinforcing member, the light from the LED element can be reflected on the side wall portion 112 of the LED mounting module reinforcing member 11A. Therefore, the brightness of the LED display panel can be improved.

  Furthermore, a metal such as aluminum has a higher thermal conductivity than a resin or the like. When a metal such as aluminum is used as the LED mounting module reinforcing portion, the heat generated from the LED element can be released at the side wall portion 112 of the LED mounting module reinforcing member 11A. Therefore, the heat dissipation of the LED display panel can be improved.

  The side wall portion 112 is formed so as to be erected from all the end portions of the bottom surface portion 111 of the LED mounting module reinforcing member, thereby further suppressing the intrusion of water into the LED mounting module. It becomes possible to further improve the rigidity (strength) of the mounting module itself. Further, when a metal such as aluminum is used as the LED mounting module reinforcing member, the side wall portion 112 is formed so as to be erected from all the end portions of the bottom surface portion 111 of the LED mounting module reinforcing member 11A. The brightness and heat dissipation of the LED display panel can be improved. Hereinafter, each structural member which can comprise the LED display panel of this invention is demonstrated. Each of the following constituent members can be used in the LED display panel of the present invention without being limited to the first embodiment or the second embodiment of the LED display panel.

[Adhesive layer]
The adhesive layer 24 that bonds the thickened portion 222 and the LED mounting module reinforcing member 11 can fix the LED mounting module to the LED mounting module reinforcing member 11 and suppresses the intrusion of water into the LED mounting module. The adhesive layer is not particularly limited as long as it has an airtightness to the extent that it can be. As an adhesion layer, the resin layer containing resin which has a functional group which has silicon, such as a silyl group, can be mentioned, for example. The adhesive (sealant) that forms the adhesive layer is preferably an adhesive (sealant) that does not contain a solvent that degrades the resin or the like. Examples of the adhesive (sealant) that can form such a resin layer include a liquid sealant (manufactured by ThreeBond 1535, manufactured by Three Bond Co., Ltd.) mainly composed of a special polymer.

  The same applies to the adhesive layer 24A that bonds the inner wall side surface of the side wall 112 and the LED mounting module 10 in the LED display panel of FIG.

[Containment sheet]
The accommodation sheet 14 can stably accommodate a plurality of LED mounting modules 10 in a connected state, and protects the LED mounting modules 10 accommodated in the LED display panel 100 during use. It is. The accommodation sheet 14 uses two flexible sheets as the front-side sheet 12 and the back-side sheet 13, respectively, and stacks them to stably accommodate the plurality of LED mounting modules 10 between both 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 a possible space.

  The LED accommodating portion is an area excluding an area necessary for accommodating the LED mounting module 10 on the front surface side sheet 12 and the back surface side sheet 13, and an area necessary for accommodating the LED mounting module 10. In a region including the connecting portion 15 formed therebetween, the sealing portion is formed in close contact with each other, thereby forming a bag-like hollow portion surrounded by the sealing portion. As described above, the connecting portion 15 of the storage sheet 14 is a portion of the storage sheet 14 that serves as a sealing portion that seals the LED mounting module 10 with the front side sheet 12 and the back side sheet 13 being in close contact with each other. Especially, it is a sealing part formed between the plurality of LED mounting modules 10 and refers to a part that becomes a foldable part when folded.

  The sheet constituting the storage sheet 14 is not particularly limited as long as it is flexible enough to be folded at the connecting portion 15. For example, a known resin sheet made of vinyl (soft plastic), acrylic, styrene, or the like can be used as appropriate. However, in the LED display panel of the present invention, it is particularly preferable to use vinyl chloride from the viewpoint that the radius of curvature of the bent portion when folded can be easily made sufficiently small. In addition, in order to provide the other desired physical property as needed, the accommodation sheet 14 may be coated or colored.

[LED mounting module]
As shown in FIG. 3, the LED mounting module 10 constituting the LED display panel 100 has an LED element substrate 1 formed by forming a metal wiring portion (not shown) on a support substrate 21 made of a resin sheet or the like. It is a light emitting member formed by mounting the elements 3 in a matrix.

  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 21 is formed. The metal wiring portion is formed at least on the information display surface side of the support substrate 21. When a so-called dot matrix display device is configured, a multi-layer metal wiring portion is usually configured.

  In particular, when the LED display panel is a dot matrix display device, it is preferable that a black layer 23 for improving contrast is formed on the outermost surface of the LED non-mounting region in the LED mounting module 10. The black layer 23 may be one in which the surface of the LED element protection member 22 is colored with a black pigment or the like, or a resin base material containing the same pigment, and like the LED element protection member described above, A structure in which a through hole is formed in a portion corresponding to the element mounting region may be separately stacked on the upper surface of the LED element protection member 22.

  The supporting substrate 21 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 21 as a flexible substrate, the LED display panel can be installed by following the curved surface even when the installation location is a wall surface including a curved surface. In addition, by using the support substrate 21 as a flexible substrate, the risk of scratches or breakage of the accommodation sheet due to contact with the LED mounting module can be greatly reduced. However, the present invention is not limited to this, and the support substrate 21 may be an LED element substrate having a certain rigidity, such as a rigid substrate.

  Preferred examples of the resin material 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 21 may be made of a material having rigidity, such as wood, metal, or ceramic.

  The arrangement of the metal wiring portions formed on the support substrate 21 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.

  Moreover, you may further arrange | position the diffusion plate 25 in the any layer above the light emission surface of an LED element as needed in the LED display panel 100. FIG. The diffuser plate 25 has a function of uniformly diffusing light emitted from the LED elements 3 serving as a light source to reduce 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 having a minute and random lens array formed on the entire surface in order to exhibit a light diffusion function on a translucent resin film made of polycarbonate resin, acrylic resin, or the like is a specific example of the diffusion plate 25. Can be mentioned.

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

  The LED information display device 200 is put to practical use by allowing the LED display panel 100 to stand on its own with various auxiliary devices (not shown) as needed, or to be installed on the wall surface of the installation site.

  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. Although this whole control part can also be made to provide in an edge part as a system different from the connection part 15 of an LED mounting module, for example depending on usability, there is no limitation in particular in an arrangement position.

  As described above, the LED display panel of the present invention is an LED display panel that can suppress the intrusion of water into the LED mounting module.

DESCRIPTION OF SYMBOLS 1 LED element board | substrate 1A LED element board | substrate 1B Conventional LED element board | substrate 10 LED mounting module 11 LED mounting module reinforcement member 11A LED mounting module reinforcement member 111 Bottom face part 111a Mounting surface 112 Side wall part 12 Surface side sheet | seat 13 Back side Sheet 14 Storage sheet 15 Connecting portion 21 Support substrate 22 LED element protection member (spacer)
221 Area other than the thickened part 222 Thickened part 222a Outer wall of the thickened part 222b Inner wall of the thickened part 223 Through hole 22B Conventional LED element protection member 23 Black layer 24 Adhesive layer 24A Adhesive layer 25 Diffuser 3 LED element 4 Wiring 5 Relay board 6 Driver 7 External operation board D Gap 100 LED display panel 100A LED display panel 100B Conventional LED display panel 200 LED information display device

Claims (7)

LED mounting module, LED mounting module reinforcing member having at least a mounting surface on which the LED mounting module can be mounted, and a plate-shaped LED element protection member disposed on a support substrate of the LED mounting module An LED display panel comprising:
In the LED element protection member, a through hole is formed in a mounting area of the LED element mounted on the LED mounting module in a plan view of the LED mounting module,
Formed on the surface of the LED element protection member on the arrangement side of the LED mounting module reinforcing member so as to be thicker than a portion other than the edge of the LED element protection member in a circumferential shape from the end of the LED element protection member The thickness enlargement part which is done is formed,
The LED display panel by which the said thickness expansion part and the said LED mounting module reinforcement member are adhere | attached through the contact bonding layer. The LED mounting module is accommodated between the front side sheet and the back side sheet,
An LED mounting module reinforcing member is disposed on the back side sheet,
The LED display panel according to claim 1, wherein the LED element protection member is a spacer disposed between the front side sheet and a support substrate of the LED mounting module.   The LED display panel according to claim 2, further comprising a foldable connecting portion in which the front side sheet and the back side sheet are in close contact. The LED mounting module reinforcing member includes a side wall,
The LED display according to any one of claims 1 to 3, wherein an inner surface that is a surface of the side wall portion facing the LED mounting module and the LED mounting module are bonded via an adhesive layer. panel.   The LED display panel according to claim 1, wherein the adhesive layer is a resin layer containing a resin having a functional group having silicon.   The storage elastic modulus, which is the maximum value of the tan δ peak temperature in the temperature-tan δ curve, measured based on JIS K7244-1 in the LED element protection member and the LED mounting module reinforcing member is 50 MPa or more. The LED display panel according to any one of 5.   The LED information display apparatus provided with the LED display panel in any one of Claim 1 to 6 as an information display part.

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