JP6575155B2 - LED display panel and LED information display device - Google Patents

Description

  The present invention relates to an LED display panel and an LED information display device. Specifically, the present invention relates to an LED display panel on which an LED element is mounted, which can be easily carried by folding in a compact manner, and an LED information display device using the LED display panel.

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

  Actually, such LED information display devices are installed in various places on the highway, and various traffic information is displayed and transmitted to passing vehicles as needed. 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 device that can be performed in time has been proposed (see Patent Document 2).

JP 2008-218674 A JP 2011-40570 A

  The LED device panel described in Patent Literature 2 is housed in a housing sheet made of a resin sheet in a form in which a plurality of LED mounting modules are connected in one direction. And the part which becomes the connection part between each LED mounting module among this accommodation sheet | seat is a foldable part, and has a structure which can be folded compactly by folding this part at the time of conveyance. ing.

  However, in the LED information display device described in Patent Document 2, the width of the connecting portion formed in the foldable portion is larger than the mounting pitch between the LED elements in the LED mounting module. For this reason, the LED information display device described in Patent Document 2 has a partial mounting pitch of the LED elements in the connecting portion when the plurality of LED mounting modules display one piece of information in an integrated manner. The fluctuation causes the quality of display information to be impaired.

  On the other hand, when the mounting pitch between the LED elements in the LED mounting module is matched with the width of the connecting portion, the mounting pitch between the LED elements is unnecessarily enlarged, and information such as characters and figures displayed on the LED information display device is displayed. The definition is reduced.

  There has been a strong demand for the development of an LED display panel that can display information such as characters and figures in a high-definition state as an LED display panel in which a plurality of LED mounting modules are integrated, and an LED information display device using the LED display panel.

  As a result of intensive studies, the present inventors have found that the above problem can be solved by making the housing sheet for housing the LED mounting module in the LED display panel into a specific structure, thereby completing the present invention. It came to. Specifically, the present invention provides the following.

  (1) An LED mounting module in which an LED element is mounted on an LED element substrate, a display surface side sheet, and a back side sheet are laminated, and between the display surface side sheet and the back side sheet, An LED display panel including a plurality of the LED mounting modules connected in a connected state, wherein the display surface side sheet includes a colored sheet portion and a transparent sheet portion, and the display surface A side sheet | seat is an LED display panel which is the structure by which the said colored sheet | seat part does not exist in the range which overlaps with the said LED mounting module in the area | region which comprises the connection part between the said some LED mounting modules in planar view.

  According to the invention of (1), in the LED display panel on which a plurality of LED mounting modules are mounted, the mounting pitch of the LED elements can be optimized including the connecting portion between the LED mounting modules. Thereby, information, such as a character and a figure, can be displayed in a state with high definition as an LED display panel in which a plurality of LED mounting modules are integrated.

  (2) The LED display panel according to (1), wherein the LED mounting module has an LED element mounted at a position within 3 mm from a side of the connecting portion.

  According to the invention of (2), the above effect of the invention of (1) can be expressed at a higher level. That is, it is possible to narrow the mounting pitch between the portions where the LED mounting modules are connected to each other, and as a LED display panel in which a plurality of LED mounting modules are integrated, characters, graphics, etc. in a higher definition state. Information can be displayed.

  (3) The mounting pitch of the LED elements on the LED element substrate is 10 mm or more and 15 m or less, and the mounting pitch of the LED elements in the portion straddling the connecting portion between the LED mounting modules; The LED display panel according to (1) or (2), wherein a difference from a mounting pitch of the LED elements on the substrate is 1.5 mm or less.

  According to the invention of (3), the effect of the invention of (1) or (2) can be expressed at a higher level. That is, a plurality of LED mounting modules are integrated by reducing the difference in distance between the mounting pitches of the portions straddling the connecting portions between the LED mounting modules and the mounting pitches of the LED elements on the LED element substrate. Thus, as one LED display panel, information such as characters and figures can be displayed in a higher definition state.

  (4) The LED display panel according to any one of (1) to (3), which is foldable at the connecting portion.

  According to the invention of (4), the LED display panel according to any one of (1) to (3) can be easily transported while maintaining the folding function between the LED mounting modules while enjoying the effects described above. You can also enjoy the effect of sex.

  (5) An LED information display device comprising the LED display panel according to any one of (1) to (4) as an information display unit.

  According to invention of (5), the LED information display apparatus which has the said effect of invention of (1) to (4) can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the LED display panel which can display information, such as a character and a figure in a high-definition state as an LED display panel in which several LED mounting modules were united, and an LED information display apparatus using the same are provided. be able to.

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 in the BB line of the LED display panel of FIG. It is sectional drawing which shows the layer structure of the connection part of the LED display panel of this invention. It is sectional drawing which shows the layer structure of the connection part of other embodiment of the LED display panel of this invention. It is a perspective view with which it uses for description of how to fold the LED display panel of this invention.

  Hereinafter, embodiments of the LED display panel and the LED information display device using the LED display panel of the present invention will be sequentially 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>
[overall structure]
As shown in FIG. 1, the LED display panel 100 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. The plurality of LED mounting modules 10 are stably accommodated in the accommodation sheet 2. 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 the X and Y directions above and connected in a matrix form also fall within the scope of the present invention as long as they satisfy other essential constituent requirements.

  As shown in FIG. 8, the LED display panel 100 preferably has a structure that can be folded in such a manner that the unit parts including the individual LED mounting modules 10 are stacked at the time of transportation or storage. The folding method is not particularly limited, for example, it may be folded by a winding structure that is always outside the back side sheet 22 winding, but when the LED display panel 100 connects three or more LED mounting modules, It is preferable to have a structure that can be folded into ninety-nine folds. Ninety-nine folds refers to a structure in which a plurality of facets are connected to each other, and the adjacent facets are folded so that the front surface-front surface and the back surface-back surface overlap in order.

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

  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.

[Containment sheet]
As shown in FIG. 4, the accommodation sheet 2 constituting the LED display panel of the present invention is a bag-like sheet member that can accommodate a plurality of LED mounting modules 10 in a connected state. The storage sheet 2 has a function of stably storing the LED mounting module 10 and protecting it. The storage sheet 2 is configured by superimposing the display surface side sheet 21 and the back surface sheet 22 and forming a storage portion that is a space in which a plurality of LED mounting modules 10 can be stably stored between these sheets. The In addition, in order to provide a desired physical property as needed, the accommodation sheet 2 may be coated or colored.

  The housing portion of the LED mounting module is formed as a bag-like cavity between the display surface side sheet 21 and the back surface sheet 22. This hollow portion is a region excluding a region necessary for accommodating the LED mounting module 10 in both the above-described sheets, and is in close contact with each other in a region including the connecting portion 24 formed between the regions. By forming the sealing portion 23, the sealing portion 23 is formed in a portion surrounded by the sealing portion 23.

  The display surface side sheet 21 includes a colored sheet portion 211 and a transparent sheet portion 212 connected to or integrated with the colored sheet portion. A configuration in which the colored sheet portion and the transparent sheet portion are formed of an integral resin film and both portions are formed depending on whether or not coloring is present may be employed.

  The transparent sheet portion 212 is a sheet disposed immediately above the LED mounting module 10, and as shown in FIG. 4, in the display surface side sheet 21, an area surrounding at least a matrix area where the LED elements 3 are mounted, That is, when the LED element is turned on, an area on the area where information is displayed is formed by the transparent sheet portion 212 having a high light transmittance in the area of the display surface side sheet 21. Note that the transparent sheet portion 212 is not limited to the resin sheet, and a separate transparent member may alternatively be disposed.

  The accommodation sheet 2 constituting the LED display panel 100 of the present invention is, as shown in FIG. 3, of the LED mounting module 10 out of the two opposing sides of the LED mounting module 10 accommodated in the LED display panel 100. It is preferable that the end portion 211a of the colored sheet portion is present at a position overlapping with the LED mounting module 10 in a plan view on a set of side sides parallel to the connecting direction and in the vicinity of the side sides.

  Further, as shown in FIG. 4, the end portion 211 a of the colored sheet portion is joined in a manner of being superimposed on the side of the transparent sheet portion 212 and the surface of the vicinity thereof, that is, on the outermost surface side of the LED mounting module 10. It is preferable. According to this configuration, when the LED display panel 100 is folded, a gap is formed between the facing transparent sheet portions 212, and damage due to contact between the facing LED elements 3 at the time of folding, Abrasion can be prevented.

  In the overlapping portion of the end portion 211a of the colored sheet portion to the transparent sheet portion 212, the end portion 211a of the colored sheet portion overlaps from the side of the transparent sheet portion 212 within a range of 10 mm to 20 mm. Is preferred. When the width of the overlapping range is 10 mm or more, the strength of the joined portion can be sufficiently maintained, and the protection function of the LED element 3 and the transparent sheet portion is enhanced. On the other hand, if this width exceeds 20 mm, it is not preferable in that the display range of the LED display panel is narrowed.

  On the other hand, the storage sheet 2 constituting the LED display panel 100 of the present invention is a region constituting the connecting portion 24 between the plurality of LED mounting modules in the display surface side sheet 21, as shown in FIG. The end portion 211a of the colored sheet portion does not exist in the range overlapping the LED mounting module 10 in plan view. Here, the “joining portion” is a part of the storage sheet 2 and refers to a region between a plurality of LED mounting modules. Specifically, it is a sealing portion of the storage sheet 2 formed by closely attaching the display surface side sheet 21 and the back surface side sheet 22 between the storage portions in which the LED mounting modules 10 are stored. It refers to a portion overlapping in a plan view a region sandwiched between a side perpendicular to the connecting direction of the LED element mounting modules and the same side of the other LED mounting modules facing each other.

  FIG. 8 is a perspective view for explaining how to fold the LED display panel of the present invention. In the connecting sheet 24, the connecting portion 24 formed by bringing the display surface side sheet 21 and the back surface sheet 22 into close contact with each other in the connecting portion 24 is alternately mountain-folded and folded as shown in FIG. 8. It is preferable to have a structure that can be folded compactly.

In the accommodation sheet 2, by arranging the colored sheet portion 211 and the transparent sheet portion 212 at the end of the accommodation portion of the LED mounting module 10 in the above configuration, the vicinity of the side on the connection portion side of each LED mounting module 10 The LED element can be mounted up to a region close to the end portion of the LED element substrate 1 without being limited by the presence of the end portion 211a of the colored sheet portion. Thereby, in the LED display panel 100, the mounting pitch P ₁ (see FIG. 6) of the LED elements 3 in the portion straddling the connecting portion between the LED mounting modules 10 is reduced, and the LED elements 3 in the LED mounting module 10 are reduced. The difference from the mounting pitch P ₂ (see FIG. 4) can be made sufficiently small.

  As a resin sheet which comprises the accommodation sheet | seat 2, the well-known resin sheet which consists of vinyl (soft plastic), an acryl, styrenes, etc. can be used suitably. However, in the LED display panel 100 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.

  The thickness of the colored sheet portion 211 of the display surface side sheet 21 is preferably 0.3 mm or more and 0.8 mm or less. When the thickness of the colored sheet portion 211 is 0.3 mm or more, the possibility of contact between the transparent sheet portions 212 of the LED mounting module 10 due to bending or the like when folded when the LED display panel 100 is conveyed is further reduced. be able to. From the economical viewpoint, it is preferably 0.8 mm or less.

[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 11 made of a resin sheet or the like. It is a display member formed by mounting the elements 3 in a matrix.

In the LED display panel 100 of the present invention, the LED element mounting pitch P ₂ (see FIG. 4) is preferably 10 mm or more and 15 mm or less, and more preferably 11 mm or more and 14 mm or less. By setting the mounting pitch of the LED elements in such a range, an LED display panel having high definition and excellent display quality can be obtained.

  In the LED display panel 100 of the present invention, as described above, by specially devising the structure of the sealing portion 23 at the end portion of the storage sheet 2, in the vicinity of the side on the connection side of the LED element substrate 1. LED elements can be arranged up to. As a specific arrangement of the LED elements 3 taking advantage of this action, in the LED mounting module 10, it is preferable that the LED elements are mounted at a position within 3 mm from the side of the LED element substrate 1 on the connecting part side. Similarly, it is more preferable that the LED element is mounted at a position within 1.5 mm. By arranging the LED elements in this way, the mounting pitch of the LED elements 3 in the region straddling the connecting portion 24 between the LED mounting modules 10 can be sufficiently reduced. In this specification, “mounted at a position within 3 mm from the side” means the shortest distance between the side and the outer edge of the mounted LED element.

The LED mounting module 10 is a region that straddles the connecting portions 24 between the plurality of LED mounting modules 10 as a structure that effectively utilizes the above-described effect of being able to sufficiently reduce the mounting pitch of the LED elements 3 in the connecting portions. Specifically, the difference between the mounting pitch P ₁ of the LED elements 3 and the mounting pitch P ₂ of the LED elements 3 in each LED mounting module 10 (see FIG. 4) is preferably 1.5 mm or less. 1.0 mm or less, more preferably 0.5 mm or less, and most preferably 0 mm. By setting the difference in mounting pitch for each region in the integrated LED display panel 100 to 1.5 mm or less, an LED display panel having high definition and excellent display quality can be obtained. For example, the LED element 3 has a size of 3 mm square, the width of the connecting portion 24 (the distance between the LED mounting modules 10 shown in FIG. 6) is 7.5 mm, and the mounting pitch in each LED mounting module 10 is 12. In the case of 5 mm, the mounting pitch in the region straddling the connecting portion is 13.5 mm because the LED element closest to the same side is mounted at a position 3 mm from the side of the connecting portion side of the LED mounting module 10. The difference from the mounting pitch of the LED elements 3 in the LED mounting module 10 can be 1 mm.

  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 support substrate 11 is a flexible substrate, the spacer is preferably formed.

  For example, the spacer 12 may be formed only in a portion surrounding the outer periphery of the matrix region where the LED elements 3 are mounted in a matrix. Many conventional products have such a structure. However, the spacer 12 is more preferably formed in the entire LED non-mounting region as shown in FIG. For example, a configuration in which a resin sheet made of polycarbonate, acrylic, or the like and having a partial through hole corresponding to the LED mounting region is laminated in a manner covering the entire matrix region can be given as a specific example of a preferable configuration. . By adopting such a configuration of the spacer 12, the LED display panel according to the present invention in which the housing sheet is configured by a resin sheet having a relatively high flexibility and a smaller thickness than the conventional one can be used. The LED element 3 can be reliably protected from external impact or the like.

  In particular, when the LED display panel is a dot matrix display device, it is preferable that a black layer 13 for improving contrast is 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 is a resin base material containing the pigment, and corresponds to the LED element mounting region like the spacer. A structure in which a through hole is formed in a portion may be separately laminated on the upper surface of the spacer 12.

  The support 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 display panel can be installed following the curved surface even when the installation location is a wall surface including a curved surface. 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 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 11 may be made of a material having rigidity, such as wood, metal, or ceramic.

  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 form, and is the same arrangement as a conventionally known LED element substrate. Can be arranged arbitrarily. 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 display panel 100, 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.

  Moreover, you may further arrange | position the diffusion plate 15 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 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.

<Other embodiments of LED display panel>
FIG. 7 is an embodiment of an LED display panel formed by extending a transparent sheet portion 212 that is the display surface side sheet 21 so as to contact the back surface sheet 22. Since the transparent sheet portion 212 is formed so as to be in contact with the back side sheet 22, the adhesion between the transparent sheet portion and the colored sheet portion can be improved, which is further preferable in terms of durability. It can be set as an LED display panel.

Further, the LED display panel of the embodiment of FIG. 7 is also an LED display panel arranged so that the colored sheet portion does not exist at a position overlapping in plan view of the LED mounting module. Therefore, it is possible to be smaller the difference between the mounting pitch P ₂ between the LED elements in the LED mounting module mounting pitch P ₁ identical LED devices _(see FIG. 4) at the portion straddling the connecting portion 24, the folding While having a function, the object of the present invention can be achieved in which a plurality of LED mounting modules can be integrated to display information as one LED display panel.

<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 lighting or lighting timing, lighting time, etc. individually for each LED element 3 mounted on each LED mounting module 10. An algorithm for executing the timing control programmatically in ROM as an executable program, and such an algorithm as an IC chip can be realized as a substrate on which the algorithm is mounted. 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, according to the present invention, as an LED display panel in which a plurality of LED mounting modules are integrated, an LED display panel capable of displaying information such as characters and figures in a high-definition state, and LED information using the LED display panel A display device can be provided.

DESCRIPTION OF SYMBOLS 1 LED element board | substrate 2 Accommodating sheet 21 Display surface side sheet 22 Back side sheet 23 Sealing part 24 Connection part 3 LED element 4 Wiring 5 Relay base 6 Driver 7 External operation base 10 LED mounting module 11 Support board 12 Spacer 13 Black layer DESCRIPTION OF SYMBOLS 14 Back side reinforcement 15 Diffusion plate 211 Colored sheet part 211a End part of colored sheet part 212 Transparent sheet part 100 LED display panel 200 LED information display apparatus

Claims (5)

An LED mounting module in which an LED element is mounted on an LED element substrate;
A display surface side sheet and a back surface sheet are laminated, and a storage sheet capable of storing and connecting a plurality of the LED mounting modules between the display surface side sheet and the back surface sheet. An LED display panel,
The display surface side sheet is composed of a colored sheet portion and a transparent sheet portion,
The display surface side sheet is configured such that the colored sheet portion does not exist in a range overlapping the LED mounting module in a plan view in a region forming a connecting portion between the plurality of LED mounting modules. .   2. The LED display panel according to claim 1, wherein the LED mounting module has an LED element mounted at a position within 3 mm from a side of the connecting portion. The mounting pitch of the LED elements is not more than 10mm or more 15 m m in the LED elements on the substrate for,
The difference between a mounting pitch of the LED elements in a portion straddling the connecting portion between the LED mounting modules and a mounting pitch of the LED elements on the LED element substrate is 1.5 mm or less. LED display panel of description.   The LED display panel according to claim 1, wherein the LED display panel can be folded at the connecting portion.   The LED information display apparatus provided with the LED display panel in any one of Claim 1 to 4 as an information display part.

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