JP2020118858A - Display device, method of manufacturing display device, and display system - Google Patents

Abstract

To provide a display device that is originally curved with a water-proof film on a display surface.SOLUTION: A display device 100 of the present invention is a display device having a display surface 120a. The display device is originally curved in a circular arc shape so as to be easily installed onto cylindrical objects 600, 600', and 600'' along their circumferential direction. The display surface is originally curved along the curvature of the display device. The display device further includes a water-proof film formed on the display surface so as to cover at least the originally curved display surface.SELECTED DRAWING: Figure 1

Description

The present invention relates to a display device, a method of manufacturing the display device, and a display system.

Conventionally, it has been considered to convert existing telephone pole advertisements into digital signage as an outdoor advertisement medium (for example, see Non-Patent Document 1).

There is a regulation that a digital signage projecting from a telephone pole must be installed at a distance of 4.5 m or more from the ground. The electric pole winding type digital signage can be installed within a range of 1.8 m to 2.8 m from the ground. Therefore, a utility pole-wound digital signage is expected as a digital signage that can be installed at a height that matches the eyes of a person or the eyes of a driver.

Mynavi Co., Ltd., "Installing electronic paper on telephone poles and displaying useful information-Chuden and DNP proof experiment", [online], [January 21, 2019 search], Internet <URL:https:// news.mynavi.jp/article/20170620-a059/>

One of the challenges of outdoor digital signage is to achieve sufficient waterproof performance. In particular, the applicant has studied a curved surface type display as a digital signage of a telephone pole winding type, but a curved surface type display device having excellent waterproof performance has not been commercially available.

Conventional waterproof treatment (for example, caulking) often causes problems in waterproof performance and reliability even when applied to a flat display device. Further, the conventional waterproof treatment (for example, caulking) does not have sufficient resistance (allowable amount) to "bend". Therefore, in order to develop a curved surface type display device having excellent waterproof performance, it has been necessary to solve the problems with the conventional waterproof treatment (for example, caulking).

An object of the present invention is to provide a curved surface type display device excellent in waterproof performance, a method of manufacturing the display device, and a display system.

In one aspect of the present invention, the display device of the present invention is a display device having a display surface, and the display device can be easily attached to the cylindrical object along the circumferential direction of the cylindrical object. It is pre-curved in an arc shape so that the display surface is pre-curved along the curve of the display device, and the display device is configured to at least cover the pre-curved display surface. The display device further includes a waterproof film formed on the display surface.

In one embodiment of the present invention, the waterproof film may be vacuum-contacted on the display surface.

In one embodiment of the present invention, the display device may be flexible so that the degree of curvature of the display device can be changed according to the radius of the cylindrical object. ..

In one embodiment of the present invention, the display device may further include at least one hole for passing a cord-like member to attach the display device to the cylindrical object.

In one embodiment of the present invention, the display device may further include a heat dissipation unit for discharging heat generated in the display device.

In one embodiment of the invention, the display device may further comprise at least one hole for venting to prevent condensation.

In one embodiment of the present invention, a plurality of LEDs may be arranged in a matrix on the display surface.

In one embodiment of the present invention, the waterproof film may include a polarizing film or a film having low reflectivity.

In one embodiment of the present invention, the display device is communicatively connected to a sensor that detects an approach of a vehicle and/or a passerby, and the display device includes a communication unit. May be configured to display the information received via the communication unit on the display surface in response to the sensor detecting the approach of the vehicle and/or the passerby.

In one aspect of the present invention, the method of the present invention is a method of manufacturing a display device, the method comprising providing a base curved along the circumferential direction of a cylindrical object, and Arranging a flexible module with a display surface on the base along the surface of the curved base, whereby the display surface is along the surface of the curved base. Bending, and forming a waterproof film so as to cover at least the curved display surface.

In one embodiment of the present invention, providing a curved base along the circumferential direction of a cylindrical object provides a planar cushioning material and bonding a substrate onto the planar cushioning material. And producing the curved base by bending the planar cushioning material and the substrate along the curved surface of a jig having a curved surface of a cylindrical object. Disposing may include disposing the module on the curved substrate along a surface of the curved substrate.

In one embodiment of the present invention, disposing the modules may include aligning with each other by utilizing the magnetic properties of the curved substrate and the modules.

In one embodiment of the invention, locating the module may also include locating the module such that a surface of the curved substrate forms a portion not covered by the module. Good.

In one embodiment of the invention, the method comprises forming the planar cushioning material such that at least one hole for venting to prevent condensation is formed between the planar cushioning material and the substrate. May further include deforming a part of the substrate and a part of the substrate.

In one embodiment of the present invention, forming the waterproof film may include bringing the waterproof film into vacuum contact with the display surface.

In one embodiment of the present invention, the method may further include, after forming the waterproof film, disposing a protective cushioning material on the waterproof film along an edge of the module.

In one embodiment of the present invention, a plurality of LEDs may be arranged in a matrix on the display surface.

In one embodiment of the present invention, the waterproof film may include a polarizing film or a film having low reflectivity.

In one aspect of the present invention, a system of the present invention is a display system including the above-described display device and a server device configured to be capable of communicating with the display device, and the server device includes the display. The information to be displayed on the device is transmitted to the display device, and the display device displays the received information on the display surface.

In one embodiment of the present invention, the display system further comprises a sensor that detects an approach of a vehicle and/or a passerby, the sensor being configured to be able to communicate with the server device. May transmit a signal to the server device in response to detecting the approach of a vehicle and/or a passerby, and the information may be information corresponding to the signal.

In one embodiment of the present invention, the display device may be configured to be capable of transmitting a signal corresponding to the information to an autonomous vehicle within a predetermined range.

According to the present invention, it is possible to provide a curved surface type display device having excellent waterproof performance, a method for manufacturing the display device, and a display system.

The figure which shows an example of a structure of the curved surface type display apparatus 100 excellent in waterproof performance. The figure which shows an example of a preferable structure of the display apparatus 100. The figure which shows an example of the flow of the manufacturing method of the display apparatus 100. The figure which shows an example of a structure of the display system 10 provided with the display device 100. The figure which shows an example of the flow of a process of a cylindrical object system.

The terms used in this specification are defined below.

“Cylindrical object” refers to an object whose overall shape is substantially cylindrical. An example of the “cylindrical object” is a cylinder in which the radius of the circle of the cross section perpendicular to the central axis of the object is uniform, but is not limited to this. For example, a frustum-shaped object in which the radius of a circle of a cross section perpendicular to the central axis of the object and the radius of a circle of another cross section perpendicular to the central axis of the object are different is also a “cylindrical object”. Is one example. Specific examples of the “cylindrical object” include a power pole for transmitting electric power, a telephone pole for transmitting electric signals, a light pole on which an electric light (light source for illumination) is installed, and a traffic signal. The signal pillars and the sign pillars on which light-reflective road signs are installed are not limited to these.

In the present specification, the “display device” refers to a device that displays content having information transmission capability (for example, a device in which a plurality of LEDs are arranged in a matrix) and a content that does not have information transmission capability. It should be broadly construed to include a display device (eg, a lighting device). An example of the content having the information transmission capability is information (for example, an image), but is not limited to this. The image includes a still image and/or a moving image. The image may be a single image that is fixedly displayed, or may be a plurality of different images that are displayed so as to switch from one image to another. Examples of the content that does not have the information transmission capability include, but are not limited to, solid-color single-color lighting content and solid-color multiple-color lighting content.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for the same components throughout the specification.

1. Display Device of the Present Invention FIG. 1 shows an example of the configuration of a curved display device 100 having excellent waterproof performance. Specifically, FIG. 1A is a perspective view showing a state in which the display device 100 is attached to a cylindrical object 600 having a reference radius r ₁ (for example, r ₁ =about 30 cm). FIG. 1B is a perspective view showing a state where the display device 100 is attached to a cylindrical object 600′ having a relatively small radius r ₂ (for example, r ₂ =about 20 cm). 1C is a perspective view showing a state in which the display device 100 is attached to a cylindrical object 600″ having a relatively large radius r ₃ (for example, r ₃ =about 40 cm). The radius of the cylindrical object described above is shown. r ₁ , r ₂ and r ₃ (about 20 cm, about 30 cm, about 40 cm) are for the purpose of mere illustration, and are limited to these as long as the relationship of r ₂ <r ₁ <r ₃ is satisfied. It not intended to. Further, in the example shown in FIG. 1, the display device 100 is assumed to have been pre-curved to conform to the curved surface of the cylindrical body 600 having a reference radius r _1.

The display device 100 includes a content having information transmission capability (for example, information (for example, image)) and a content having no information transmission capability (for example, solid-color single-color lighting content, solid-color multiple-color lighting content). ) Is displayed on the display surface 120a. As shown in FIG. 1, the display device 100 may be attached to the columnar object 600 along the circumferential direction of the columnar object 600 (for example, a power pole, a telephone pole, a light pole, a signal pole, and a marker pole). Pre-curved into an arc for ease of use. Further, as shown in FIG. 1, the display surface 120a is curved in advance along the curve of the display device 100. Further, the display device 100 further includes a waterproof film formed on the display surface 120a so as to cover at least the curved display surface 120a. In the example shown in FIG. 1, the waterproof film is formed so as to cover the entire display device 100. The waterproof film is in vacuum contact with the display surface 120a, for example.

The display device 100 is flexible so that the degree of curvature of the display device 100 can be changed according to the radius of the cylindrical object. For example, the degree of curvature of the display device 100 when attached to a columnar object 600′ (FIG. 1B) having a relatively small radius r ₂ is equal to that when attached to the columnar object 600 (FIG. 1A) having a reference radius r ₁ . The display device 100 has flexibility so that the display device 100 is curved to a degree greater than that of the display device 100. Thus, the display device 100 has been previously curved along the curved surface of the cylindrical body 600 having a reference radius r _1, a cylindrical object having a relatively small radius r ₂ than the reference radius r ₁ It is configured to be deformable along the curved surface of 600'. Also, for example, the degree of curvature of the display device 100 when attached to a cylindrical object 600″ (FIG. 1C) having a relatively large radius r ₃ is attached to a cylindrical object 600 (FIG. 1A) having a reference radius r ₁ . The display device 100 is flexible so as to be smaller than the degree of curvature of the display device 100. In this way, the display device 100 has a curved surface of the cylindrical object 600 having the reference radius r _1. Is curved in advance, but is configured to be deformable along the curved surface of the cylindrical object 600″ having a radius r ₃ that is relatively larger than the reference radius r ₁ .

In this way, when the display device 100 is attached to a cylindrical object, the degree of curvature of the display device 100 can be changed or adjusted so that the curved surface of the display device 100 is along the circumferential direction of the cylindrical object. Is. As described above, the reason why the display device 100 can be deformed along the curved surface of a cylindrical object having a radius larger or smaller than the reference radius r ₁ is that the waterproof film is preliminarily curved when the display device 100 is curved. This is because the waterproof treatment is performed by using this. The waterproof film can maintain its waterproof performance even with respect to "bending" to the extent that conventional waterproofing (for example, caulking) does not allow it. It can be said that the waterproof film has more resistance to “bending” than the conventional waterproof treatment, but if the flat display device is subjected to waterproof treatment with the waterproof film and then the flat display device subjected to the waterproof treatment is bent, the waterproof film is waterproof. The film will break and/or break. In this respect, the applicant succeeded in preventing breakage and/or breakage of the waterproof film by making a creative ingenuity and performing waterproof treatment using the waterproof film in a state where the display device 100 is curved in advance.

The display device 100 is, for example, as shown in FIG. 1, by passing a string-shaped member through the display device 100 and winding the cord-shaped member around the columnar objects 600, 600 ′, 600 ″. It is configured so that it can be attached to.

The display device 100 may be attached to the columnar objects 600, 600′, 600″ in other ways. For example, the display device 100 may be attached to the columnar objects 600, 600′, 600″. It may be performed using an adhesive tape or may be performed using an adhesive.

An example of the display device 100 is an LED display device in which a plurality of LEDs are arranged on the display surface 120a, but the display device 100 is not limited to this. It is also possible to use an arbitrary light emitting element instead of the LED. The display device 100 may be any type of display device, but when the display device 100 is a display device of the type that emits light, a device for information transmission by displaying content having information transmission capability. In addition to being used as a light source, it can also be used as a light source for illumination by displaying a content that does not have information transmission capability.

FIG. 2 shows an example of a preferable configuration of the display device 100. 2A is a perspective view of the display device 100, and FIG. 2B is an exploded view of the display device 100.

In the example shown in FIG. 2, the display device 100 includes a base 110, a module 120 having a display surface 120 a, and a protective cushioning material 130 for protecting the module 120. Although the display device 100 further includes a waterproof film that covers at least the display surface 120a, the waterproof film is not shown in FIG. The base 110 includes a base cushioning material 140 and a substrate 150. The display device 100 may not include the base 110 and/or the protective cushioning material 130.

The base cushioning material 140 includes a cushioning member (for example, sponge) on the back surface side (mounting surface side). The display device 100 can be non-invasively mounted on the cylindrical object 600 by the deformation of the buffer member arranged on the cylindrical object 600 or the unevenness on the surface of the cylindrical object 600. is there.

The substrate 150 and module 120 are magnetic (eg, by including a magnet). By utilizing the magnetism, the module 120 can be arranged on the substrate 150 more easily.

The base cushioning material 140 and the substrate 150 may include a hole 160 for passing a thick string-like member (for example, a band) for attaching the display device 100 to the columnar object 600. In the example shown in FIG. 2, the holes 160 for passing the thicker string-like members are formed at the four corners of the base cushioning material 140 and the substrate 150, respectively.

In addition, the base cushioning member 140 and the substrate 150 may further include a hole 170 for passing a thin string-shaped member (for example, a wire) for assisting the attachment of the display device 100 to the columnar object 600. .. In the example shown in FIG. 2, two holes 170 for passing the thin string-like member are formed near the center of each long side of the base cushioning material 140 and the substrate 150.

Note that eyelets for increasing the strength of the holes may be attached to the holes 160 for passing the thicker string-like members and the holes 170 for passing the thinner string-like members.

In addition, in the embodiment shown in FIG. 2, an example in which two holes 170 for passing the thin string-like member are formed near the centers of the long sides of the base cushioning material 140 and the substrate 150 has been described. However, the present invention is not limited to this. The number of holes 170 through which the thin string-like member is inserted is an arbitrary integer of 0 or more, and long sides of the base cushioning material 140 and the substrate 150 so as to prevent the display device 100 from “floating” at the time of attachment. Can be appropriately changed according to the length of the.

In the display device 100, the thick string-shaped member is passed through the hole 160 for passing the thick string-shaped member, and the thick string-shaped member is wound around the columnar object 600 (when necessary, as a supplement, A thin string-like member through a hole 170 for passing the string-like member through, and by winding the thin string-like member around the cylindrical object), a cylindrical object 600 (for example, a power pole, a utility pole, a light pole, It can be attached to a signal pole or a signpost).

The module 120 has flexibility. The module 120 has a plurality of LEDs arranged in a matrix on the front surface side (that is, the display surface 120a), and supplies a signal and power indicating information to be displayed using the plurality of LEDs on the back surface side. It has a connector. It should be noted that the planar base cushioning material 140 and the substrate 150 may have holes for passing cables for supplying signals and power indicating information to be displayed using a plurality of LEDs, as shown in FIG. 2B.

An advertisement may be displayed on the display surface 120a of the module 120, for example. Further, on the display surface 120a of the module 120, road traffic information (for example, information about traffic jam, information indicating an accident-prone area, information indicating a road surface freeze, information prompting a speed decrease, for the driver of the vehicle, Information regarding weather) may be displayed. In this case, the module 120 can function as a road sign. Further, on the display surface 120a of the module 120, charge information for a vehicle to enter a predetermined zone or pass through the predetermined zone may be displayed. In this case, the module 120 may act like an ETC gate and be configured such that zone pricing is feasible. Further, illumination light (for example, white illumination light) may be emitted from the display surface 120a of the module 120. In this case, the module 120 can function as a light source for illumination. Further, the display surface 120a of the module 120 may display charge information for vehicles parked or stopped in a predetermined zone. In this case, the module 120 can function as a parking meter. The same applies when the module 120 is used in a charging station of an electric vehicle.

In the example shown in FIG. 2, the module 120 is composed of six small modules, but the present invention is not limited to this. The module 120 may be composed of one large module or may be composed of two or more small modules.

The module 120 may be arranged on the substrate 150 so that the surface of the substrate 150 is not covered by the module 120. Accordingly, the surface of the substrate 150 that is not covered by the module 120 can function as a heat dissipation unit that dissipates heat generated in the display device 100.

In addition, the display device 100 may include an advertising area by forming a wide portion of the surface of the substrate 150 that is not covered by the module 120. An advertisement is presented in the advertisement area. The mode of presentation of the advertisement is arbitrary. For example, the advertisement may be presented by pasting an advertisement in a paper medium, may be presented by printing the advertisement in the advertising area, or may be presented by painting the advertisement in the advertising area. Good. In addition, the emergency illumination light (for example, emergency white illumination light) is emitted from the display surface 120a, so that the module 120 can also function as an emergency illumination light source.

Further, the display device 100 may further include at least one hole for preventing dew condensation. As a result, it is possible to prevent the problem that the display content cannot be visually recognized due to dew condensation.

Further, the display device 100 may include an emergency power supply. Accordingly, the display device 100 can operate even when the power supply from the outside of the display device 100 is cut off. In an emergency, the display device 100 can function as an emergency sign by displaying an emergency image (for example, evacuation route, warning, road traffic information (for example, information about traffic jam, information about disaster)). It may be possible.

The display device 100 can be mounted, for example, on the cylindrical object 600 at a height of about 1.8 to about 2.8 m from the ground. As a result, the display device 100 is a projecting type display device (that is, the columnar object 600 is projected from the columnar object 600 so as to project from the columnar object 600) which is regulated to be mounted at a height of about 4.5 m or more from the ground. It can be mounted at a height comparable to the line-of-sight of pedestrians (eg pedestrians, cyclists) or motorists on the sidewalk, compared to mounted displays). Therefore, a passerby on the sidewalk or a driver of the vehicle can more easily recognize the presence of the display device 100.

2. Method of Manufacturing Display Device of the Present Invention FIG. 3 shows an example of a flow of a method of manufacturing the display device 100. Hereinafter, each step shown in FIG. 3 will be described.

Step S301: Providing the planar base cushioning material 140. The back surface side (mounting surface side) of the flat base cushioning material 140 is provided with a shock absorbing member (for example, sponge) on the entire surface, and the front surface side of the flat base cushioning material 140 is an adhesive surface.

Step S302: The substrate 150 for supporting the flat base cushioning material 140 is adhered to the flat base cushioning material 140. The mode of bonding the planar base cushioning material 140 and the substrate 150 is arbitrary. The planar base cushioning material 140 and the substrate 150 may be bonded using, for example, an adhesive tape, or may be bonded using an adhesive. Further, the material necessary for adhesion may be arranged entirely on the front surface side of the flat base cushioning material 140, or may be partially arranged on the front surface side of the flat base cushioning material 140. The substrate 150 is, for example, an iron plate of about 0.3 to about 0.4 mm, but is not limited to this.

At any timing after step S302 and before step S303, at least one hole for venting to prevent dew condensation is formed between the planar base cushioning material 140 and the substrate 150 as shown below. A part of the planar base cushioning material 140 and a part of the substrate 150 may be deformed (for example, a notch is formed) so as to be formed between them.

Step S303: The planar base cushioning material 140 and the substrate 150 are curved by deforming the planar base cushioning material 140 adhered to the substrate 150 along the curved surface of the jig having the curved surface of the cylindrical object 600. , Thereby producing a curved base 110. In order to deform the flat base cushioning material 140 and the substrate 150, the flat base cushioning material 140 and the substrate 150 may be fixed to a jig.

Although the curved base 110 is provided by performing steps S301 to S303 shown in FIG. 3, the manner of providing the curved base 110 is not limited to this. For example, the pre-curved base cushioning material 140 may be adhered to the pre-curved substrate 150 to produce the curved base 110, and the curved base 110 may be provided.

Step S304: at least one having flexibility on the curved base 110, along the surface of the curved base (ie, on the curved substrate 150, along the surface of the curved substrate 150). Two modules 120 are arranged. As a result, the module 120 (and the display surface 120a of the module 120) is curved along the curved surface of the base (the curved surface of the substrate 150).

The back side of the module 120 may further include at least one magnet. Accordingly, the magnetism of the substrate 150 and the module 120 can be used to align with each other, and the module 120 can be easily arranged on the curved substrate 150.

Further, the module 120 may be arranged on the substrate 150 so that the surface of the substrate 150 forms a portion not covered by the module 120. The surface of the substrate 150 that is not covered by the module 120 can function as, for example, a heat dissipation unit that dissipates heat generated in the display device.

Step S305: A waterproof film is formed so as to cover at least the display surface 120a of the curved module 120. The waterproof film may be vacuum-bonded onto the display surface 120a, for example. The waterproof film may also have other properties. For example, the waterproof film may be a polarizing film or a film having low reflectivity.

A polarizing film or a film having low reflectivity may be further formed on the waterproof film.

Step S306: Arrange the protective cushioning material 130 (eg, sponge) on the waterproof film along the edge of the module 120. The thickness of the protective cushioning material 130 is, for example, about 10 mm, but is not limited to this.

After placing the protective cushioning material 130, the protective cushioning material 130, the module 120, the curved substrate 150, and the curved base cushioning material 140 are removed from the jig, and the waterproof film is curved base cushioning material 140. It is folded back to the back side of. Then, a cable for supplying a signal indicating the information to be displayed using a plurality of LEDs and a power supply is connected to the connector on the module 120, and the connection portion is waterproofed (for example, using waterproof tape or caulking seal). To do.

As described above, by waterproofing the display device 100 that is curved in advance using the waterproof film, the module 120 is crushed by "releasing" the pressure for sticking the waterproof film through the curved surface in the manufacturing process. The flexibility of the display device 100 can be used in the mounting process to adjust the degree of curvature along the surface of the cylindrical object during mounting without damaging or breaking the waterproof film. It is possible to provide the display device 100. Such flexibility of the display device 100 is particularly significant when the display device is attached to a columnar object having an overall truncated cone shape (for example, a power pole, a telephone pole, a light pole, a signal pole, or a sign pole). Is. This is because even if the radius of the columnar object at the mounting position at the upper end in the longitudinal direction of the display device 100 is different from the radius of the columnar object at the mounting position at the lower end in the longitudinal direction of the display device 100, the upper end in the longitudinal direction of the display device 100. This is because each of the lower ends in the longitudinal direction can be independently deformed along the surface of the cylindrical object.

Since the conventional polarizing film and the film having low reflectivity are supposed to be attached to a flat surface, the elasticity is not high. In this regard, by waterproofing a display device that is curved in advance using a waterproof film, even a waterproof film having a low elasticity can be applied to the display device of the present invention.

Note that step S306 shown in FIG. 3 may be omitted.

3. Display system comprising display device of the present invention Applicant may find it useful for road traffic by mounting the display device 100 on a cylindrical object (eg, power pole, utility pole, light pole, signal pole, signpost). I thought there was.

FIG. 4 shows an example of the configuration of the display system 10 including the display device 100.

In the example illustrated in FIG. 4, the display system 10 includes the display devices 100 _{1 to} 100 _N of the present invention, communication units 200 ₁ to 200 _N that control communication between the display device 100 ₁ and the outside, and a predetermined unit. Sensors 300 _{1 to} 300 _N that detect the approach of vehicles (for example, automobiles, trains) and/or pedestrians (for example, pedestrians and cyclists) within the range. Display device 100 ₁ includes a display surface 120a, a processor unit 180 which includes one or more CPU (Central Processing Unit), a memory unit 190. Note that in the example shown in FIG. 4, the display device 100 ₁ and the communication unit 200 ₁ are attached to a columnar object, and the display device 100 ₁ , the communication unit 200 _1, and the sensor 300 ₁ form one columnar body. It constitutes the object system. Here, N is an arbitrary integer of 1 or more.

The processor unit 180 controls the operation of the entire display device 100 ₁ . The processor unit 180 reads the program stored in the memory unit 190 and executes the program. Accordingly, the display device 100 ₁ can function as a device that executes a desired step.

The memory unit 190 stores a program required to execute the process, data required to execute the program, and the like. The memory unit 190 stores, for example, a program for executing the processing shown in FIG. Here, it does not matter how the program is stored in the memory unit 190. For example, the program may be preinstalled in the memory unit 190. Alternatively, the program may be installed in the memory unit 190 by being downloaded via a network, or may be installed in the memory unit 190 via a storage medium such as an optical disk or a USB. Good.

The sensor 300 ₁ is configured to be able to communicate with the display device 100 ₁ . In the example shown in FIG. 4, the sensor 300 ₁ may be configured to be able to communicate with the display devices 100 _{2 to} 100 _N. The same applies to other display devices and other sensors. In the columnar object system, the display device 100 ₁ and the sensor 300 ₁ may be connected by wire or wirelessly.

In the example shown in FIG. 4, the display system 10 further includes a server device 400 configured to be able to communicate with the display devices 100 _{1 to} 100 _N and the sensors 300 _{1 to} 300 _N of the present invention. In the example shown in FIG. 4, the display devices 100 _{1 to} 100 _N , the sensors 300 _{1 to} 300 _N, and the server device 400 can communicate with each other via the Internet 500.

A database unit (not shown) that stores information in which predetermined signals received from the sensors 300 _{1 to} 300 _N are associated with information is connected to the server device 400. Alternatively, the database unit may be provided inside the server device 400. The database unit may be composed of a single hardware component or may be composed of a plurality of hardware components.

The server device 400 receives the signal transmitted from the sensor 300 ₁ in response to detecting the approach of the vehicle and/or the passerby, and transmits the information corresponding to the received signal to the display device 100 _1. Can be configured to be possible. The same applies to other display devices and other sensors.

Information displayed on each of the display devices 100 _{1 to} 100 _N (for example, advertisements, road traffic information for drivers of automobiles (for example, information about traffic jam, information indicating an accident-prone area, and road freezing) Information, information prompting speed reduction, weather information, emergency vehicle approach information indicating that an emergency vehicle is approaching, traffic signal information), emergency images (eg evacuation route, warning, road traffic information (eg , Information about traffic congestion, information about disasters)), fare information for vehicles to enter or pass through a predetermined zone, fare information for vehicles parked or stopped in the predetermined zone) May be information stored in the respective memory units of the display devices 100 _{1 to} 100 _N or information transmitted from the server device 400.

In the embodiment shown in FIG. 4, it has been described that the sensors 300 _{1 to} 300 _N and the server device 400 can communicate with the display devices 100 _{1 to} 100 _N via the Internet 500, but the present invention is not limited to this. Not limited. It is also possible to use any type of network instead of the Internet 500. For example, a network that allows different display devices attached to different cylindrical objects to communicate with each other may be used.

Further, in the embodiment shown in FIG. 4, an example in which each of the communication units 200 ₁ to 200 _N is outside the display device 100 _{1 to} 100 _N has been described, but the present invention is not limited to this. The communication units 200 ₁ to 200 _N may be provided inside the display devices 100 _{1 to} 100 _N , respectively. Further, in the embodiment shown in FIG. 4, an example in which each of the sensors 300 _{1 to} 300 _N is outside the display device 100 _{1 to} 100 _N has been described, but the present invention is not limited to this. The sensors 300 _{1 to} 300 _N may be provided inside the display devices 100 _{1 to} 100 _N , respectively.

Further, in the embodiment shown in FIG. 4, it is described that the display devices 100 _{1 to} 100 _N and the sensors 300 _{1 to} 300 _N communicate with each other via the server device 400, but the present invention is not limited to this. For example, the display devices 100 _{1 to} 100 _N may be capable of communicating with the sensors 300 _{1 to} 300 _N without going through the server device 400, respectively.

Furthermore, for example, the display device 100 ₁ may be capable of communicating with the display device 100 ₂ without going through the server device 400. In this case, for example, sensor 300 ₁ in response to detecting the approach of a vehicle and / or passerby, sensor 300 _1, a display device 100 _1, another display device in the range from the sensor 300 _first predetermined to 100 _2, information transmits a signal indicating the approach of the vehicle and / or passerby, the display device 100 ₁ and the display device 100 _2, the information corresponding to the received signal identified in the memory unit, the identified May be displayed on the display surface 120a. The same applies to other display devices. In this way, the plurality of display devices (particularly, the processor units of the plurality of display devices) operate in a distributed autonomous manner to display content having information transmission capability (eg, information (eg, image)). It may be possible to display content that does not have information transmission capability and function as a light source for illumination.

4. Process of Cylindrical Object System FIG. 5 shows an example of a process flow of the cylindrical object system. Hereinafter, each step shown in FIG. 5 will be described.

Step S501: It is determined whether or not the sensor 300 ₁ detects the approach of the vehicle and/or the passerby. If the determination result is “Yes”, the process proceeds to step S502, and if the determination result is “No”, the process ends (normal end).

Step S502: Display device 100 _1, information corresponding to the approach of the vehicle and / or passerby (e.g., image) is displayed. The information displayed may be the information stored in the memory unit 190 of the display device 100 _{1 or} the information stored in the database unit of the server device 400.

When the information stored in the database unit of the server device 400 is displayed on the display device 100 ₁ , the sensor 300 ₁ outputs a predetermined signal regarding the approach of the vehicle and/or the passerby before step S502. To the server device 400, the server device 400 identifies the information corresponding to the predetermined signal from the database unit, the server device 400 transmits the identified information to the display device 100 ₁ , and the display device 100 ₁ receives the information identified via the communication unit 200 _1.

When the information stored in the display apparatus 100 ₁ of the memory unit 190 is displayed on the display device 100 _1, before the step S502, the sensor 300 _1, detects the approach of the vehicle and / or passerby in particular in response, it transmits a signal indicating the approach of the vehicle and / or passerby on the display device 100 _1, the display device 100 _1, in the memory unit 190, identifies the information corresponding to the received signal.

Step S503: Display device 100 _1, a signal corresponding to the information displayed, the vehicle to automatically travel within a predetermined range (hereinafter, referred to as "automatically driven vehicle") to the. It should be noted that the autonomous vehicle does not matter whether or not a person is sitting in the driver's seat as long as the vehicle automatically travels.

In this way, by transmitting a signal to the autonomous driving vehicle, the autonomous driving vehicle can travel in preparation for danger so that when a person is driving, he or she senses the danger by intelligence. Such a signal indicates, for example, "Slow down because you are going into an accident-prone area,""Because you are going into a tunnel, and visibility is poor, switch the headlight to a high beam." It is possible, but not limited to this. In addition, in a scene in which a vehicle manually driven by a human (hereinafter, referred to as “human-driving vehicle”) and an automatic driving vehicle are mixed, the information displayed on the display device 100 ₁ and the automatic driving vehicle are displayed. By associating the transmitted signals with each other, it is possible to allow the self-driving vehicle and the human-driving vehicle to have the same behavior.

Although the present invention has been illustrated by using the preferred embodiment of the present invention as described above, the present invention should not be construed as being limited to this embodiment. It is understood that the scope of the present invention should be construed only by the scope of the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and common general knowledge from the description of the specific preferred embodiments of the present invention.

INDUSTRIAL APPLICABILITY The present invention is useful as a curved surface type display device excellent in waterproof performance, a method for manufacturing the display device, a display system, and the like.

10 display system 100 _{1 to} 100 _N display device 110 base 120 module 120a display surface 130 protective cushioning material 140 base cushioning material 150 substrate 160 hole 170 hole 180 processor unit 190 memory unit 200 ₁ to 200 _N communication unit 300 _{1 to} 300 _N sensor 400 server device 500 internet 600 columnar object

Claims (21)

A display device having a display surface,
The display device is pre-curved in an arc shape so as to be easily attached to the cylindrical object along the circumferential direction of the cylindrical object,
The display surface is pre-curved along the curvature of the display device,
The display device further comprises a waterproof film formed on the display surface so as to cover at least the pre-curved display surface. The display device according to claim 1, wherein the waterproof film is vacuum-adhered to the display surface. The display device according to claim 1 or 2, wherein the display device is flexible so that the degree of curvature of the display device can be changed according to the radius of the cylindrical object. Display device. The display device according to any one of claims 1 to 3, wherein the display device further comprises at least one hole through which a string-shaped member is inserted to attach the display device to the columnar object. The display device according to any one of claims 1 to 4, wherein the display device further includes a heat radiating portion for radiating heat generated in the display device. The display device according to claim 1, further comprising at least one hole for venting to prevent dew condensation. The display device according to claim 1, wherein a plurality of LEDs are arranged in a matrix on the display surface. The display device according to claim 1, wherein the waterproof film includes a polarizing film or a film having low reflectivity. The display device is communicatively connected to a sensor that detects the approach of a vehicle and/or a passerby,
The display device includes a communication unit,
The display device is configured to display information received via the communication unit on the display surface in response to the sensor detecting the approach of the vehicle and/or a passerby. Item 9. The display device according to any one of items 1 to 8. A method of manufacturing a display device, the method comprising:
Providing a curved base along the circumferential direction of the cylindrical object,
Disposing a flexible module having a display surface on the curved base along the surface of the curved base, whereby the display surface of the curved base is disposed. Curving along the surface,
Forming a waterproof film over at least the curved display surface. Providing a curved base along the circumferential direction of a cylindrical object is
Providing a planar cushioning material,
Adhering a substrate on the planar cushioning material,
Producing the curved base by bending the planar cushioning material and the substrate along the curved surface of a jig having a curved surface of a cylindrical object,
11. The method of claim 10, wherein disposing the module comprises disposing the module on the curved substrate along a surface of the curved substrate. 12. The method of claim 11, wherein placing the modules comprises aligning them with each other by utilizing the magnetic properties of the curved substrate and the modules. 13. The method of claim 11 or claim 12, wherein locating the module comprises locating the module such that a surface of the curved substrate forms a portion not covered by the module. .. Deforming a portion of the planar cushioning material and a portion of the substrate such that at least one hole for venting to prevent condensation is formed between the planar cushioning material and the substrate. The method according to any one of claims 11 to 13, further comprising: The method according to claim 10, wherein forming the waterproof film includes vacuum-contacting the waterproof film onto the display surface. 16. The method according to any one of claims 10 to 15, further comprising: after forming the waterproof film, disposing a protective cushioning material on the waterproof film along an edge of the module. The method according to claim 10, wherein a plurality of LEDs are arranged in a matrix on the display surface. The method according to claim 10, wherein the waterproof film includes a polarizing film or a film having low reflectivity. A display device according to any one of claims 1 to 9,
A display system comprising a server device configured to communicate with the display device,
The server device transmits information to be displayed on the display device to the display device,
A display system, wherein the display device displays the received information on the display surface. The display system further includes a sensor that detects an approach of a vehicle and/or a passerby, and the sensor is configured to be able to communicate with the server device,
The sensor transmits a signal to the server device in response to detecting an approach of a vehicle and/or a passerby,
The display system according to claim 19, wherein the information is information corresponding to the signal. The display system according to claim 19 or 20, wherein the display device is configured to be capable of transmitting a signal corresponding to the information to an autonomous vehicle within a predetermined range.

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