JP7116431B2 - DISPLAY DEVICE, METHOD FOR MANUFACTURING THE SAME, DISPLAY SYSTEM - Google Patents

Description

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

Conventionally, conversion of existing telephone pole advertisements into digital signage as an outdoor advertising medium has been studied (see, for example, Non-Patent Document 1).

There is a regulation that a digital signage projecting from a utility pole must be installed at a distance of 4.5 m or more from the ground. Digital signage wrapped around utility poles can be installed in a range of 1.8m to 2.8m from the ground. Therefore, telephone pole-wrapped digital signage is expected as a digital signage that can be installed at a height that matches the line of sight of a person or a driver.

Mynavi Co., Ltd., “Electronic paper is installed on utility poles to display useful information – demonstration experiments by Chuden and DNP,” [online], [searched January 21, 2019], Internet <URL: https:// news.mynavi.jp/article/20170620-a059/>

One of the challenges of outdoor installation type digital signage is to achieve sufficient waterproof performance. In particular, the applicant has studied a curved display as a digital signage wrapped around a utility pole, but no curved display device with excellent waterproof performance is available on the market.

Conventional waterproof treatment (for example, caulking) often poses problems of waterproof performance and reliability even when applied to flat display devices. Also, conventional waterproofing treatments (for example, caulking) do not have sufficient resistance (tolerance) to "bending". Therefore, in order to develop a curved display device with excellent waterproof performance, it was necessary to solve the problems associated with the conventional waterproof treatment (for example, caulking).

An object of the present invention is to provide a curved display device with excellent waterproof performance, a method for 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. pre-curved in an arc such that the display surface is pre-curved along the curvature of the display device, and the display device extends the display surface so as to at least cover the pre-curved display surface. It further comprises a waterproof film formed on the display surface.

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

In one embodiment of the 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 string-like member for attaching the display device to the cylindrical object.

In one embodiment of the present invention, the display device may further include a radiator for releasing heat generated in the display device.

In one embodiment of the present invention, the display device may further comprise at least one hole for ventilation 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 invention, the waterproof film may comprise a polarizing film or a film with low reflectivity.

In one embodiment of the present invention, 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, and the display device 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, a 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; Disposing a flexible module with a display surface on a base along the curved base surface, whereby the display surface extends along the curved base surface. and forming a waterproof film to cover at least the curved display surface.

In one embodiment of the present invention, providing a curved base along the circumference of the cylindrical object provides a planar cushioning material and adheres a substrate onto the planar cushioning material. and fabricating the curved base by curving the planar cushioning material and the substrate along the curved surface of a jig having a curved surface of a cylindrical object, Arranging may comprise arranging the module on the curved substrate along a surface of the curved substrate.

In one embodiment of the invention, positioning the modules may include mutually aligning the curved substrate and the magnetic properties of the modules.

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

In one embodiment of the present invention, the method comprises: forming at least one hole between the planar cushioning material and the substrate for ventilation to prevent condensation; and deforming a portion of the substrate.

In one embodiment of the present invention, forming the waterproof film may include vacuum-sealing the waterproof film onto the display surface.

In one embodiment of the invention, the method may further comprise placing a protective cushion over the waterproof film along the edges of the module after forming the waterproof film.

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 invention, the waterproof film may comprise a polarizing film or a film with low reflectivity.

In one aspect of the present invention, a system of the present invention is a display system comprising the display device described above and a server device configured to be able to communicate with the display device, wherein the server device is configured to communicate with the display device. Information to be displayed on the device is sent 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 includes a sensor that detects approach of a vehicle and/or a passerby, the sensor is configured to communicate with the server device, and the sensor may transmit a signal to said server device in response to detecting the approach of a vehicle and/or a passerby, said information being information corresponding to said signal.

In one embodiment of the invention, the display device may be configured to be capable of transmitting signals corresponding to the information to self-driving vehicles within a predetermined range.

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

A diagram showing an example of a configuration of a curved display device 100 with excellent waterproof performance. A diagram showing an example of a preferred configuration of the display device 100 A diagram showing an example of a flow of a method for manufacturing the display device 100 1 is a diagram showing an example of a configuration of a display system 10 including a display device 100; FIG. A diagram showing an example of the processing flow of the cylindrical object system.

The terms used in this specification are defined below.

A "cylindrical object" refers to an object whose overall shape is substantially cylindrical. An example of a “cylindrical object” is, but is not limited to, a cylinder whose cross section perpendicular to the central axis of the object has a uniform radius. For example, a truncated conical object in which the radius of a circle of a cross section perpendicular to the central axis of the object differs from the radius of a circle of another cross section perpendicular to the central axis of the object is also a "cylindrical object" is an example of Specific examples of "cylindrical objects" include power poles for transmitting electric power, utility poles for transmitting electrical signals, light poles with electric lights (illumination light sources), and traffic lights. Signal poles and signposts on which light reflective road signs are installed, but are not limited to these.

As used herein, the term “display device” refers to a device that displays content with information transmission capability (for example, a device in which multiple LEDs are arranged in a matrix), and content that does not have information transmission capability. It should be interpreted broadly to include displaying devices (eg, lighting devices). A non-limiting example of content capable of conveying information is information (eg, images). Images include still images and/or moving images. The image may be a single image that is displayed statically, or multiple different images that are displayed to switch from one image to another. Examples of content that does not have the ability to convey information include, but are not limited to, plain single-color lighting content and plain multi-color lighting content.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are used for the same components throughout the specification.

1. 1. Display Device of the Present Invention FIG. 1 shows an example of the configuration of a curved display device 100 excellent in waterproof performance. Specifically, FIG. 1A is a perspective view showing the display device 100 attached to a cylindrical object 600 having a reference radius r ₁ (eg, r ₁ =about 30 cm). FIG. 1B is a perspective view showing the display device 100 attached to a cylindrical object 600′ having a relatively small radius r ₂ (eg, r ₂ =about 20 cm). FIG. 1C is a perspective view showing a state where 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). r ₁ , r ₂ , r ₃ (approximately 20 cm, approximately 30 cm, approximately 40 cm) are for illustrative purposes only and are to be limited as long as the relationship r ₂ <r ₁ <r ₃ is satisfied. 1, the display device 100 is pre-curved to follow the curved surface of a cylindrical object 600 having _a reference radius r1.

The display device 100 can transmit information-transmitting content (for example, information (eg, image)) and content that does not have information-transmitting capability (for example, plain single-color lighting content, plain multiple-color lighting content). ) is provided on the display surface 120a. As shown in FIG. 1, the display device 100 can be attached to a cylindrical object 600 (e.g., power pole, utility pole, light pole, signal pole, sign pole) along its circumference. It is 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. As shown in FIG. Furthermore, the display device 100 further includes a waterproof film formed on the display surface 120a so as to cover at least the pre-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, for example, vacuum-bonded to the display surface 120a.

The display device 100 has flexibility 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 cylindrical object 600′ (FIG. _1B ) having a relatively small radius r2 is greater than the degree of curvature of the display device 100 when attached to a cylindrical object 600 (FIG. _1A ) having a reference radius r1. The display device 100 has flexibility such that the degree of curvature of the display device 100 is greater. Thus, the display device 100 is pre-curved to follow the curved surface of a cylindrical object 600 having _a reference radius r1, but having _a relatively smaller radius r2 _than the reference radius r1. 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 r3 is greater than the degree of curvature of the display device 100 when attached to a cylindrical object 600 (FIG. _1A ) having a reference radius r1. The display device 100 has flexibility such that the degree of curvature of the actual display device 100 is less than that of the actual display device 100. In this way, the display device 100 has the curved surface of the cylindrical object ₆₀₀ having the reference radius r1. but is configured to be deformable to follow the curved surface of a cylindrical object 600'' having a radius _r3 that is relatively larger _than the reference radius r1.

In this way, when the display device 100 is attached to a cylindrical object, it is possible to change or adjust the degree of curvature of the display device 100 so that the curved surface of the display device 100 follows the circumferential direction of the cylindrical object. is. 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 r1 as described above is that the waterproof film is attached to the display device 100 in a curved state in advance. This is because waterproofing is performed by using The waterproof film can maintain its waterproof performance even for "bending" that cannot be tolerated by conventional waterproofing (for example, caulking). It can be said that the waterproof film is more resistant to "bending" than the conventional waterproof treatment. The film breaks and/or breaks. In this regard, the applicant has succeeded in preventing the breakage and/or breakage of the waterproof film by applying originality and ingenuity to perform waterproofing using the waterproof film while the display device 100 is pre-curved.

For example, as shown in FIG. 1, the display device 100 is formed by passing a string member through the display device 100 and winding it around the cylindrical objects 600, 600′, 600″. ” so that it can be attached to

The display device 100 may be attached to the cylindrical objects 600, 600′, and 600″ in other manners. For example, the display device 100 is attached to the cylindrical objects 600, 600′, and 600″ by: It may be performed using an adhesive tape, or it 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 arbitrary light-emitting elements instead of LEDs. The display device 100 can be any type of display device, but if the display device 100 is a type of display device that emits light, it can be used as a device for transmitting information by displaying content capable of transmitting information. It can also be used as a light source for illumination by displaying content that does not have information transmission capability.

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

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

The base cushioning material 140 has a cushioning member (for example, sponge) on the back side (mounting surface side). It is possible to attach the display device 100 to the cylindrical object 600 noninvasively by deforming the cushioning member along the cables arranged on the cylindrical object 600 and the irregularities on the surface of the cylindrical object 600 . be.

Substrate 150 and module 120 are magnetic (eg, by comprising magnets). By taking advantage of its magnetism, it is possible to arrange the module 120 on the substrate 150 more easily.

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

Also, the base cushioning material 140 and the substrate 150 may further include holes 170 for passing thin string-like members (eg, wires) to assist in attaching the display device 100 to the cylindrical object 600. . In the example shown in FIG. 2 , two holes 170 for passing thin string-like members are formed near the center of each of the long sides of base cushioning material 140 and substrate 150 .

Eyelets may be attached to the hole 160 for passing the thick string-like member and the hole 170 for passing the thin string-like member to increase the strength of the holes.

In addition, in the embodiment shown in FIG. 2, an example was described in which two holes 170 for passing thin string-like members were formed near the center of each of the long sides of the base cushioning material 140 and the substrate 150 . , the invention is not limited thereto. The number of holes 170 through which the thin string-like member is passed is an arbitrary integer greater than or equal to 0, and the long sides of base cushioning material 140 and substrate 150 are arranged so as to prevent display device 100 from "floating" when attached. can be changed as appropriate according to the length of

The display device 100 is configured by passing a thick string-like member through the hole 160 for passing the thick string-like member, and winding the thick string-like member around the cylindrical object 600 (as necessary, auxiliary thinning). By passing a thin string-like member through the hole 170 for passing the string-like member, and winding the thin string-like member around the cylindrical object), the cylindrical object 600 (for example, a power pole, a telephone pole, an electric light pole, signal poles, sign poles).

Module 120 is flexible. The module 120 has a plurality of LEDs arranged in a matrix on the front side (that is, the display surface 120a), and a rear side for supplying signals and power indicating information to be displayed using the plurality of LEDs. Equipped with a connector. It should be noted that the planar base cushion 140 and substrate 150 may include holes for passing cables for supplying power and signals indicating information to be displayed using a plurality of LEDs, as shown in FIG. 2B.

For example, advertisements may be displayed on the display surface 120a of the module 120 . In addition, on the display surface 120a of the module 120, road traffic information for the driver of the vehicle (for example, information on traffic congestion, information indicating that it is an accident-prone area, information indicating road surface freezing, information encouraging speed reduction, weather information) may be displayed. In this case, module 120 can function as a road sign. Further, the display surface 120a of the module 120 may display toll information for the vehicle to enter or pass through a predetermined zone. In this case, module 120 may be configured to act like an ETC gate and enable zonal pricing. Alternatively, illumination light (for example, white illumination light) may be emitted from the display surface 120 a of the module 120 . In this case, module 120 can function as a light source for illumination. Further, the display surface 120a of the module 120 may display toll information for vehicles parked or stopped within a predetermined zone. In this case, module 120 can function as a parking meter. The same is true when the module 120 is utilized at an electric vehicle charging station.

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

Note that 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 . Accordingly, the surface of the substrate 150 that is not covered with the module 120 can function as a heat radiating section for radiating heat generated in the display device 100 .

Further, the display device 100 may have an advertisement area by forming a wide portion of the surface of the substrate 150 that is not covered with the module 120 . An advertisement is presented in the advertisement area. The mode of presenting advertisements is arbitrary. For example, the advertisement may be presented by attaching a paper medium advertisement, may be presented by printing the advertisement in the advertisement area, or may be presented by painting the advertisement in the advertisement area. good. In addition, the module 120 can also function as an emergency illumination light source by emitting emergency illumination light (for example, emergency white illumination light) from the display surface 120a.

Moreover, 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 displayed content cannot be visually recognized due to dew condensation.

Moreover, the display device 100 may include an emergency power supply. Thereby, 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 emergency images (e.g., evacuation routes, warnings, road traffic information (e.g., information about traffic jams, information about disasters)). 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 above the ground. As a result, the display device 100 is an overhanging display device that is regulated to be installed at a height of about 4.5 m or more above the ground (that is, the display device 100 is attached to the columnar object 600 so as to protrude from the columnar object 600). It can be mounted as high as the line of sight of pedestrians on the sidewalk (e.g. pedestrians, cyclists) or drivers of motor vehicles, compared to the mounted display device). Therefore, pedestrians on the sidewalk or drivers of automobiles can more easily recognize the existence of the display device 100 .

2. Method for Manufacturing the Display Device of the Invention FIG. 3 shows an example of the flow of the method for manufacturing the display device 100 . Each step shown in FIG. 3 will be described below.

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

Step S<b>302 : Attach the substrate 150 for supporting the planar base cushioning material 140 to the planar base cushioning material 140 . The mode of adhesion between the planar base cushioning material 140 and the substrate 150 is arbitrary. The planar base cushioning material 140 and the substrate 150 may be adhered using, for example, an adhesive tape, or may be adhered using an adhesive. Also, the material required for adhesion may be placed entirely on the surface side of the planar base cushioning material 140 or may be partially placed on the surface side of the planar base cushioning material 140 . The substrate 150 is, for example, an iron plate with a thickness of about 0.3 to about 0.4 mm, but is not limited to this.

It should be noted that at any time after step S302 and before step S303, at least one hole for ventilation is formed between planar base cushioning material 140 and substrate 150 to prevent dew condensation, as shown below. A portion of planar base cushion 140 and a portion of substrate 150 may be deformed (eg, notched) so as to form therebetween.

Step S303: The planar base cushioning material 140 and the substrate 150 are curved by deforming the planar base cushioning material 140 to which the substrate 150 is adhered along the curved surface of the jig provided with the curved surface of the cylindrical object 600. , thereby creating a curved base 110 . In order to deform the planar cushioning base material 140 and the substrate 150, the cushioning planar base material 140 and the substrate 150 may be fixed to a jig.

The curved base 110 is provided by performing steps S301 to S303 shown in FIG. 3, but the manner of providing the curved base 110 is not limited thereto. For example, a curved base 110 may be fabricated by bonding a pre-curved substrate 150 to a pre-curved base cushion 140 to provide a curved base 110 .

Step S304: On the curved base 110, along the surface of the curved base (i.e., on the curved substrate 150, along the surface of the curved substrate 150), at least one flexible One module 120 is arranged. This causes the module 120 (and the display surface 120a of the module 120) to curve along the curved surface of the base (the curved surface of the substrate 150).

The back side of module 120 may further comprise at least one magnet. This makes it possible to align the substrate 150 and the module 120 with each other using the magnetism of the substrate 150 and the module 120 and easily arrange the module 120 on the curved substrate 150 .

Also, the module 120 may be placed on the substrate 150 such that the surface of the substrate 150 forms a portion not covered by the module 120 . The surface of the substrate 150 not covered by the module 120 can function, for example, as a heat sink for releasing heat generated in the display device.

Step S305: forming a waterproof film to cover at least the display surface 120a of the curved module 120; The waterproof film can be, for example, vacuum-sealed onto the display surface 120a. Note that the waterproof film may also have other performance. For example, the waterproof film may be a polarizing film or a film with low reflectivity.

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

Step S306: Place a 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, approximately 10 mm, but is not limited to this.

After placing the protective bumper 130 , the protective bumper 130 , the module 120 , the curved substrate 150 and the curved base bumper 140 are removed from the jig and the waterproof film is removed from the curved base bumper 140 . folded back to the back side of the A cable for supplying power and signals indicating information to be displayed using a plurality of LEDs is then connected to a connector on the module 120 and the connection is waterproofed (eg, using waterproof tape or caulking). do.

In this way, by waterproofing the pre-curved display device 100 using a waterproof film, the module 120 can be crushed by "releasing" the pressure for attaching the waterproof film by the curved surface during the manufacturing process. It is possible to use the flexibility of the display device 100 to adjust the degree of curvature along the surface of the cylindrical object during installation without damaging or breaking the waterproof film. A display device 100 can be provided. Such flexibility of the display device 100 is particularly significant when the display device is mounted on a cylindrical object having an overall frusto-conical shape (e.g., power poles, utility poles, light poles, signal poles, sign poles). 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 display device 100 is different from the radius of the cylindrical object at the mounting position at the lower end in the longitudinal direction of display device 100, the upper end in the longitudinal direction of display device 100 and the lower end in the longitudinal direction can independently deform along the surface of the cylindrical object.

Conventional polarizing films and films with low reflectivity are not highly elastic because they are supposed to be attached to a flat surface. In this regard, by waterproofing a previously curved display device using a waterproof film, even a waterproof film that does not have high elasticity can be applied to the display device of the present invention.

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

3. A display system comprising the display device of the present invention Applicant believes that the display device 100 may be useful in road traffic by attaching it to a cylindrical object (e.g., power pole, utility pole, light pole, signal pole, sign pole). I wondered.

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

In the example shown in FIG. 4, the display system 10 includes display devices 100 ₁ to 100 _N of the present invention, communication units 200 ₁ to 200 _N for controlling communication between the display device 100 ₁ and the outside, and a predetermined and sensors 300 ₁ to 300 _N that detect the approach of vehicles (eg, automobiles, trains) and/or pedestrians (eg, pedestrians, cyclists) within range. The display device 100 ₁ includes a display surface 120 a , a processor section 180 including one or more CPUs (Central Processing Units), and a memory section 190 . In the example shown in FIG. 4, the display device _100-1 and the communication unit 200-1 are attached to _a cylindrical object, and the display device 100-1, the communication unit _200-1 , and the sensor _300-1 are combined into _one columnar object. Constructs an object system. Here, N is any integer greater than or equal to 1.

The processor unit 180 controls the operation of the _entire display device 1001 . The processor unit 180 reads a program stored in the memory unit 190 and executes the program. This allows the display device 1001 to function as _a device that executes desired steps.

The memory unit 190 stores programs required for executing processes, data required for executing the programs, 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 section 190 . For example, the program may be pre-installed in memory unit 190 . Alternatively, the program may be installed in memory section 190 by being downloaded via a network, or may be installed in memory section 190 via a storage medium such as an optical disc or 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, sensor 300 ₁ may be configured to communicate with display devices 100 ₂ -100 _N . The same is true for other displays and other sensors. In the columnar object system, the display device _100-1 and the sensor _300-1 may be wired or wirelessly connected.

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

Server device 400 is connected to a database unit (not shown) that stores information that associates predetermined signals received from sensors 300 ₁ to 300 _N with information. Alternatively, the database section may be provided inside server device 400 . Note that 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 signals transmitted from the sensors 300-1 in response to detecting the approach of vehicles and/or pedestrians, and transmits information corresponding to the received signals to the display device _100-1 . can be configured to allow The same is true for other displays and other sensors.

Information displayed on each of the display devices 100 ₁ to 100 _N (for example, advertisements, road traffic information for automobile drivers (for example, information on traffic congestion, information indicating an accident-prone area, information indicating road surface freezing, etc.) information, information to encourage slowing down, weather information, emergency vehicle approaching information indicating that an emergency vehicle is approaching, traffic signal information), emergency images (e.g. evacuation routes, warnings, road traffic information (e.g. , information on traffic jams, information on disasters)), toll information for vehicles entering or passing through a predetermined zone, toll information for vehicles parked or stopped within a predetermined zone) may be information stored in the respective memory units of the display devices 100 ₁ to 100 _N , or may be information transmitted from the server device 400 .

In the embodiment shown in FIG. 4, it was explained 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. Any type of network could be used in place of the Internet 500 . For example, a network may be used that allows different display devices attached to different cylindrical objects to communicate with each other.

Also, in the embodiment shown in FIG. 4, an example in which the communication units 200 ₁ to 200 _N are respectively outside the display devices 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 the sensors 300 ₁ to 300 _N are respectively outside the display devices 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.

In the embodiment shown in FIG. 4, 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 each be able to communicate with the sensors 300 ₁ to 300 _N without going through the server device 400 .

Furthermore, for example, the display device _100-1 may be able to communicate with the display device 100-2 without going through the server device 400. _FIG . In this case, for example, in response to sensor 300 ₁ detecting an approaching vehicle and/or pedestrian, sensor 300 ₁ may cause display 100 ₁ and another display within a predetermined range from sensor 300 ₁ to 100 ₂ transmits a signal indicating the approach of a vehicle and/or a passerby, and the display devices 100 ₁ and 100 ₂ identify information corresponding to the received signal in the memory unit, and the identified information may be displayed on the display surface 120a. The same applies to other display devices. In this way, a plurality of display devices (especially processor units of each of the plurality of display devices) operate in an autonomous decentralized manner to display content (for example, information (for example, images)) having information transmission capability. Alternatively, it may be possible to display content that does not have information transmission capability and function as a light source for illumination.

4. Processing of the Cylindrical Object System FIG. 5 shows an example of the processing flow of the cylindrical object system. Each step shown in FIG. 5 will be described below.

Step S501: Determine whether the sensor 3001 has detected the approach of _a vehicle and/or a passerby. If the determination result is "Yes", the process proceeds to step S502, and if the determination result is "No", the process ends (normally ends).

Step S502: _The display device 1001 displays information (eg, image) corresponding to the approach of vehicles and/or passers-by. The displayed information may be information stored in the memory section ₁₉₀ of the display device 1001 or may be information stored in the database section of the server device 400 .

When the information stored in the database section of the server device 400 is displayed on the display device 1001, the sensor 3001 generates _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 information corresponding to the predetermined signal from the database section, the server device 400 transmits the identified information to the display device 1001, and the display device _{100 1} receives the specified information via the communication unit 200 ₁ .

If the information stored in the memory unit ₁₉₀ of the display device _100-1 is displayed on the display device 100-1, the sensor 300-1 detected the approach of _a vehicle and/or a passerby before step S502. In response, it transmits a signal indicative of the approach of the vehicle and/or pedestrians to display device 100 ₁ , and display device 100 ₁ identifies in memory portion 190 information corresponding to the received signal.

Step S503: The display device 1001 transmits _a signal corresponding to the information to be displayed to a vehicle that automatically runs within a predetermined range (hereinafter referred to as "self-driving vehicle"). As for the automatically driven vehicle, it does not matter whether a human is sitting in the driver's seat or not, as long as the vehicle runs automatically.

In this way, by sending a signal to an autonomous vehicle, the autonomous vehicle can drive in preparation for danger, just as it senses danger intelligently when a human is driving. Such a signal could indicate, for example, "You are entering an accident-prone area, so slow down" or "You are entering a tunnel, visibility is poor, switch your headlights to high beam." Possible, but not limited to. In addition, in a scene where a vehicle manually driven by a human (hereinafter referred to as a “human-driven vehicle”) and an automatically driven vehicle are running together, the information displayed on the display device ₁₀₀₁ and the information displayed on the automatically driven vehicle By matching the transmitted signals, it is possible to enable autonomous and human-driven vehicles to behave in the same way.

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

INDUSTRIAL APPLICABILITY The present invention is useful for providing a curved 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 section 190 memory section 200 ₁ to 200 _N communication section 300 ₁ to 300 _N sensor 400 server device 500 Internet 600 cylindrical object

Claims (19)

A display device comprising a display surface,
the display device is pre-curved in an arc so as to be easy to attach 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
A curved base comprising a curved base cushion and a curved substrate on said curved base cushion, said curved base comprising said curved base cushion and said curved substrate a curved base with at least one hole therebetween for ventilation to prevent condensation;
a waterproof film formed on the display surface so as to cover at least the pre-curved display surface ;
further comprising
A display device, wherein the pre-curved display surface is disposed on the curved base along a surface of the curved base . 2. The display device according to claim 1, wherein said waterproof film is in close contact with said display surface. 3. The display device according to claim 1, wherein the display device has flexibility 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 said display device further comprises at least one hole for passing a string member for attaching said display device to said cylindrical object. 5. The display device according to claim 1, further comprising a radiator for releasing heat generated in said display device. 6. The display device according to any one of claims 1 to 5, further comprising a protective cushioning material arranged on the waterproof film along the edge of the display surface. 7. The display device according to claim 1, wherein a plurality of LEDs are arranged in a matrix on said display surface. The display device according to any one of claims 1 to 7, wherein the waterproof film comprises 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 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. 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 circumference of the cylindrical object, the curved base comprising:
providing a planar cushioning material;
adhering a substrate onto the planar cushioning material;
Deforming a portion of the planar cushioning material and a portion of the substrate so as to form at least one hole between the planar cushioning material and the substrate for ventilation to prevent condensation. When,
fabricating the curved base by curving the planar cushioning material and the substrate along the curved surface of a jig having a curved surface of a cylindrical object;
including
Disposing a flexible module with a display surface on the curved substrate along the surface of the curved substrate, whereby the display surface is aligned with the curved base. curving along a surface;
forming a waterproof film to cover at least the curved display surface. 11. The method of claim 10 , wherein positioning the modules includes mutually aligning using magnetism possessed by the curved substrate and the modules. 12. The method of claim 10 or claim 11 , wherein arranging the module comprises arranging the module such that a surface of the curved substrate forms a portion not covered by the module. . The method according to any one of claims 10 to 12 , wherein forming the waterproof film includes vacuum-sealing the waterproof film onto the display surface. 14. The method of any one of claims 10-13 , further comprising placing a protective cushion over the waterproof film along the edges of the module after forming the waterproof film. The method according to any one of claims 10 to 14 , wherein the display surface has a plurality of LEDs arranged in a matrix. A method according to any one of claims 10 to 15 , wherein said waterproof film comprises a polarizing film or a film with low reflectivity. A display device according to any one of claims 1 to 9;
A display system comprising: a server device configured to be able to communicate with the display device,
The server device transmits information to be displayed on the display device to the display device,
The display system, wherein the display device receives the information and displays the information on the display surface. The display system further comprises a sensor that detects the approach of a vehicle and/or a passerby, the sensor is configured to communicate with the server device,
said sensor transmitting a signal to said server device in response to detecting an approaching vehicle and/or pedestrian;
18. The display system of claim 17 , wherein said information is information corresponding to said signal. 19. A display system according to claim 17 or 18 , wherein the display device is configured to be able to transmit signals corresponding to the information to autonomous vehicles within a predetermined range.

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