WO2002013170A1

WO2002013170A1 - Display device and display system

Info

Publication number: WO2002013170A1
Application number: PCT/JP2001/006616
Authority: WO
Inventors: Takashi Toyoda
Original assignee: Takashi Toyoda
Priority date: 2000-08-02
Filing date: 2001-08-01
Publication date: 2002-02-14
Also published as: WO2002013169A1; WO2002013166A1

Abstract

A display device such as a sign, indicator, indicating board and sign board, and a display system using these, wherein a plurality of optical fibers are embedded in the display portion of a display device so as to expose optical diffusion ends according to a specified pattern, and a laser beam is used as light to be introduced into the optical fibers to thereby produce on the display portion an optical display pattern formed by the plurality of optical diffusion ends, for an accurate viewing by an observer, even in the dark, in the presence of a shield such as fallen snow and ice deposited on the display portion of the display device, or when visibility is obstructed.

Description

Specification

Display device and display system

The present invention relates to display means for various roads, tracks, sidewalks, and the like, and in particular, various signs, indicators, and the like, which can be easily visually recognized even at night or in a situation where visibility is obstructed by heavy fog, heavy rain, snowstorm, or the like. The present invention relates to display means such as an instruction board and a signboard, and a display system using the same. Conventional technology

Display means such as various signs are installed on various roads and sidewalks such as expressways, national roads, and prefectural roads. For example, traffic signs, road signs, pedestrians, and other observers who need to be aware of driving conditions such as intersections, railroad crossings, etc. , Other signs, turn signals, display boards, indicating boards. By visually recognizing such signs and the like, the observer can, for example, confirm the direction of the road, know the road conditions, and know what to do for safety. In addition, since display means such as this type of sign is well known, no particular reference is given.

In the above conventional technique, various display means are mainly constituted by paint painting. Such a conventional display means by paint painting performs its function by notifying the observer of the contents of the display means when the display is bright and visibility is good. However, the visibility at night was low, and there was a problem that the contents of the display means could not be determined in a situation where the visibility of the observer was significantly impaired by heavy fog, heavy rain, snowstorm, and the like. Further, when the display portion of the display means is covered with a shield such as snow, there is a problem that its display function is significantly reduced. Therefore, in order to improve the visibility at night, a light-up format in which the display portion of the display means is illuminated with illumination light such as a fluorescent lamp or a light bulb may be adopted. According to this method, the visibility of the display portion at night is improved. However, it is used to maintain the lighting light Since the electricity is enormous, maintenance costs are very high. In addition, there is a problem with the life of the illumination light itself, so maintenance is complicated. Also, in situations where the visibility of the observer is obstructed by heavy fog, heavy rain, snowstorm, etc., the light of the illumination light illuminates the fog, rain, snow and water surrounding the display area of the display means and the display means. It is. For this reason, the observer can only see the surroundings of the illumination light dimly brightened, and it is difficult to visually recognize the display portion. In some cases, an electric light signage format using illumination light such as a light emitting diode or a light bulb has been adopted. Also in the case of this method, the visibility of the display portion at night is improved. However, maintenance costs are extremely high because huge amounts of electricity are required to maintain the light from bulbs. Further, there are problems such as the lifetime of the bulb itself and the lifetime of the light-emitting diode, for example, problems such as color fading and inferiority, so that maintenance is complicated. Also, under conditions where the visibility of the observer is obstructed by heavy fog, heavy rain, snowstorms, etc., the fog around the light emitting diode bulb, rainwater, etc. will be illuminated. It was only possible to see the faint brightening, and it was difficult to judge the contents of the display. It is an object of the present invention to provide a display device and a display system which can solve the above-mentioned problems of the prior art and which can be used on various roads, tracks, sidewalks, routes, and the like. It is an object of the present invention to provide a display device and a display system capable of confirming the contents of a display device even when there is a shielding object such as snow and ice in the field, or even when visibility is poor. is there. Disclosure of the invention

The present inventor studied to achieve the above object, and as a result, buried a plurality of optical fibers in a display portion of a display device so as to expose a light diffusion end according to a predetermined pattern. When a laser beam is used as the light to be introduced into the light source, the laser beam emits light at the light diffusion end, and a light display pattern formed by a plurality of light diffusion ends is formed on the display portion, enabling observation even in darkness. It has been found that it is possible to provide a display device that can be accurately viewed by a user. Also, fluorescent light Uses a laser with excellent directivity instead of illumination light such as light sources, light bulbs and light-emitting diodes.Therefore, even if there is a shield such as snow or ice on the display part of the display device, the laser beam will be emitted from the light diffusion end. When the light is emitted, the snow and ice covering the light display pattern are illuminated according to the light display pattern in order to color the snow and ice existing in the sharp travel path peculiar to the laser beam, and the display part is clearly observed. Have been found to be visible to others. Further, the present inventor has proposed that when irradiating a laser beam from the light diffusion end, fog, rain, snow, snow, smoke, and the like, which are present in a sharp traveling path peculiar to the laser beam and cause a hindrance, are developed. It has been found that under conditions where visibility is obstructed, sharp streaks of light can be created on the light display pattern, thereby making the light display pattern more noticeable to the observer. In addition, the inventor has found that it is economical to use a laser to supply an extremely small amount of power in order to exert the function of a display device. Furthermore, we found that the use of an optical fiber that does not easily deteriorate over time eliminates the need for complicated work such as replacing a light bulb or the like due to incomplete cutting, making it easier to maintain. That is, in the first aspect of the present invention, the display device includes a display unit, a laser oscillation device, and a plurality of optical fibers, and the plurality of optical fibers are embedded in the display unit and are light diffusion ends. In a display device having one end exposed on one surface of the display unit and the other end connected to the laser oscillation device, a pattern is formed on the one surface of the display unit by the light diffusion end. A display device is provided. According to a second aspect of the present invention, there is provided a display system comprising: a plurality of display devices; and an electricity supply device, wherein the plurality of display devices are connected to the electricity supply device via electricity distribution wiring. In the display device, the display device includes a display unit, a laser oscillator connected to the electrical distribution line, and a plurality of optical fibers, wherein the plurality of optical fibers are embedded in the display unit, One end that is a light diffusion end is exposed on one surface of the display unit, and the other end is connected to the laser oscillation device. The light diffusion end forms a pattern on the one surface of the display unit. A formed display system is provided. According to a third aspect of the present invention, there are provided a plurality of display devices and a laser oscillation device. A display system, wherein the number of the display devices is connected to the laser oscillation device via an optical fiber, wherein the display device has a display unit, and the optical fiber is embedded in the display unit; One end that is a light diffusion end is exposed on one surface of the display unit, and a display system is provided in which a pattern is formed on the one surface of the display unit by the light diffusion end. Embodiment of the Invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1A is a schematic front view showing an example of the display device according to the first embodiment of the present invention, and FIG. 1B is a side view of FIG. 1A. The display device 10 includes a display unit 12 and a laser oscillation device 14. In the example of FIG. 1, the display device 10 further includes a support portion that supports the display portion 12, the support portion includes an intermediate support cylinder 16 that fixedly supports the display portion 12 from the back, and a road surface. And a support column 18 for fixing one end of the intermediate support tube 16. In addition, a wind power generator 20 for supplying electricity to the laser oscillator 14 is installed on the upper part of the support 18. As shown in FIG. 1, the display device according to the first embodiment of the present invention may or may not have a support for supporting the display. In the case of having a support portion, the support portion may be composed of a plurality of support members, for example, as shown in FIG. 1, a column and an intermediate support cylinder laterally provided on the column, or a single support member. The support member, for example, may be composed of only a pillar. The display device according to the present invention may be installed on various roads, railway tracks, sidewalks such as shopping streets, plazas, parking lots, bridges, runways and other road surfaces, wall surfaces, and sea surfaces such as sea routes. Any place that can provide a site is eligible. It may also be installed in cold, snowy areas or areas where fog often occurs. When the display device has a support portion, the support portion may be embedded in these places where the display device is installed, or may be fixed by another member. For example, the strut 18 may be buried on the road surface or may be fixed on the road surface. Also, whether the intermediate support tube 16 is buried in the wall or fixed on the wall Good. On the water surface, it may be supported by another member and may be floating, or may be attached with a weight (anchor).

FIG. 2 is an exploded perspective view of the display device according to the first embodiment of the present invention. As shown in FIG. 2, the display unit 12 includes a front plate 22 having a display portion on which a predetermined pattern is formed, and a rear plate 24 having a pair of opposed side plates and a top plate connected in series. You. A plurality of optical fibers 30 are embedded in the surface plate 22, and a plurality of light-spreading ends 30 a of the optical fibers 130 are exposed on the display portion side to form a predetermined pattern. The bundle of optical fibers 130 buried so that one end is exposed on the surface plate 22 is connected to the laser oscillation device 14 without exposing it to the outside at the time of assembling the display device. Through holes 24 a, 16 a, 16 b, and 18 a for passing a bundle of optical fibers 30 are formed in the intermediate support cylinder 16 and the support column 18, respectively. The through holes 24a and 16a and the through holes 16b and 18a are formed such that the through holes correspond to each other when the display device is assembled. The bundle of optical fibers 30 buried so that one end is exposed on the surface plate 22 passes through the through-hole 24 a of the back plate 24, and the intermediate support cylinder corresponding to the through-hole 24 a It passes through the through-hole 16a of 16 and the inside of the intermediate support cylinder 16. Further, the bundle of optical fibers 30 passes through the through hole 16 b through the inner space of the intermediate support cylinder 16, and passes through the through hole 18 a of the column 18 corresponding to the through hole 16 b. , Up to the strut 18. The optical fiber 30 further passes through the inner space of the column 18 and is connected to the laser oscillation device 14 installed above the column 18. In the example of FIG. 2, the laser oscillation device 14 is a force installed on the upper part of the column. The present invention is not limited to this. For example, it may be fixed to the wall surface of the support, or may be provided in the support, at the joint between the support and the intermediate support tube, in the intermediate support, or in the display unit. Also, it may be provided outside the display device. As shown in FIG. 2, the laser oscillation device 14 may be provided with a power source such as a power generation device 20 for supplying electricity for oscillating a laser. Examples of the type of power source include a solar cell, a wind power generator, a storage battery, and other power sources, and these may be used in combination. In addition, these power supplies may be provided in the laser oscillation device 14 or at a location remote from the laser oscillation device 14, for example, For example, it may be fixed to the wall surface of the support, or may be provided in the support, at the joint between the support and the intermediate support tube, in the intermediate support, or in the display. Alternatively, the power may be supplied from a power supply provided outside the display device. The power may be supplied directly to the laser vibration device 14 or may be supplied via an appropriate transformer. When there is a power source, a voltage that can supply electricity necessary for oscillating a predetermined laser is appropriately set by the laser driving device 14. The voltage required to oscillate a predetermined laser is not particularly limited. From the viewpoint of improving economy, a low voltage is preferable. For example, a laser can be oscillated at a voltage of 1.5 V to 15 V. The necessary voltage can be set as appropriate depending on the installation location and use of the display device. As the laser oscillating device 14, a device that oscillates a laser that does not affect the human body or has an extremely low effect on the human body can be used when the laser may hit the human body or as necessary. . Regarding safety, it complies with the JISC6802 radiation safety standards for laser products. For example, those having a longer wavelength than the radiation region such as X-rays can be used. For example, lasers in the ultraviolet, visible, infrared, and microwave regions can be used, and from the viewpoint of increasing safety, improving economy, and reducing technical effort, for example, 500 n ir! Lasers having a wavelength of 1100 nm can be mentioned. In this specification, the infrared region includes a near infrared region and a far infrared region. The laser output can be appropriately selected depending on the installation location, use, and the like of the display device 10. If necessary, a laser compliant with the JISC6802 radiation safety standard for laser products can be oscillated. In principle, it is preferable not to exceed the safety class 3a of this standard. Even if the laser output is low, the function as a display device can be sufficiently exhibited. It should be noted that a device having a large output can also be used depending on the installation location and use of the display device. Further, a laser in a visible light region having a desired color can be used depending on the installation location of the display device, the use of the display device, and the like. For example, in order to obtain a desired color, a laser oscillation device that oscillates three primary colors of light can be used in combination. The laser oscillation device 14 is used to adjust the wavelength or output. May be provided. In addition, the laser oscillation device 14 may include a control device so as to oscillate the laser at a predetermined time interval, or may be controlled by remote control. For example, on / off of laser oscillation, wavelength and output can be controlled in accordance with the time zone, the brightness of the outside world, the weather condition of the display device installation location, and the like. In addition, a part of the bundle of the optical fibers 30 connected to the laser vibrating device 14 is selected, a laser beam is transmitted only to the selected group, and the selection of the group is performed. Control can be performed at predetermined time intervals or in such a manner as to change continuously. In this manner, the transmission of the laser beam itself can be adjusted by the light diffusion end 30a forming the optical display pattern, and as a result, the optical display pattern can be given a motion. In this case, it is preferable that the optical fiber 130 is associated with the position of the light diffusion end 30a of the optical fiber 30 on the optical display pattern. As shown in FIG. 2, on the surface of the surface plate 22, a plurality of light diffusion edges 30a form predetermined patterns such as characters, figures, figures, and patterns according to the purpose of the display device 10. Have been. Such a pattern is not limited to the pattern of a road sign, and may be a pattern corresponding to the contents of a traffic light, a turn signal, an indicating board, a display board, various signs, and the like. These patterns may be formed only by the light diffusion end 30a, or may be formed in combination with a known pattern forming method. For example, a predetermined pattern may be formed with paint or the like, and the light diffusion end 30a may be exposed from the surface plate 22 according to the pattern. In addition, a colorless or colored transparent or translucent member is coated so as to cover the individual light diffusion ends 30a or from above the pattern formed by the light diffusion ends 30a, thereby forming a desired coloring pattern. It may be formed. Also, the shape of the surface plate 22 is not particularly limited, and a known shape such as a polygon or a circle can be selected according to the purpose of the above-described sign or the like.

FIG. 3 is a schematic sectional view taken along the line III-III of FIG. As shown in FIG. 3, a light diffusion end 30 a, which is one end of the plurality of optical fibers 30, is embedded so as to penetrate the surface plate 22. The location of the light diffusion ends 30a is not particularly limited, and may be selected according to a predetermined interval, or may be randomly disposed at an average density. Also, The disposition density can be appropriately set according to the installation location and use of the display device. FIG. 4 is an enlarged schematic diagram of region IV in FIG. The light diffusion end 30a only needs to be exposed from the surface plate 22. The method of embedding the optical fiber 130 in the surface plate 22 is not particularly limited. As shown in FIG. 4, the optical fiber 130 may be buried so that the light diffusion end 30a does not protrude outward from the surface of the surface plate 22, or the light diffusion end 30a may be It may be buried so that it protrudes from the surface of 2. From the viewpoint of preventing adhesion of snow, dust and the like to the surface of the surface plate 22, it is preferable that the surface of the surface plate 22 is smooth as shown in FIG. Also, the force to process the exposed light diffusion end 30a into a lens shape \ The directivity of the laser beam is controlled by attaching a transparent or translucent member such as a glass droplet to the tip to form a lens shape can do. Further, the cut surface of the optical fiber 16 may be exposed as it is. In the first embodiment of the present invention, as shown in FIG. 2, the display unit 12 may have a back plate 24 from the viewpoint of protecting the optical fin 130 and improving the appearance. it can. Further, as shown in FIG. 2, the display unit 12 may have a top plate, a side plate, and a bottom plate from the viewpoint of protecting the optical fiber 30 and improving the appearance. . These surfaces may be formed integrally with the front plate 22 or the rear plate 24, or may be provided as separate members. There is no particular limitation on the shape of the top plate, but from the viewpoint of preventing snow and water from accumulating on the top plate, the cross-sectional shape should be a part of a circle or a polygon close to a circle. It is preferable that they form a part. In the above example, in order to connect the other end of the bundle of optical fibers 130 buried so that the light diffusion end 30 a is exposed to the surface plate 22 to the laser oscillation device 14, Force of providing through holes 24a, 16a, 16b, 18a in support cylinder 16 and support column 18 In the display device according to the first embodiment of the present invention, the present invention is not limited to this. Instead, the location and number of through holes to be formed can be appropriately selected according to the installation location of the laser oscillation device 14 and the positional relationship between the display unit and the support unit. For example, if the display unit is directly fixed to the column, it is preferable to form a through hole at the point of contact between the display unit and the column.For example, if the side surface of the display unit is fixed to the column, the back plate Form a through hole in the side plate without forming a through hole in the The bundle of optical fibers can be led from the display unit directly into the support without providing the plate itself.

FIG. 5 shows an example of a display device in which the support section is composed of only columns. FIG. 5 (a) is a schematic front view showing an example of the display device according to the first embodiment of the present invention, and FIG. 5 (b) is a side view of FIG. 5 (a). The display device 10 includes a display unit 12 and a laser oscillation device 14. In the example of FIG. 5, the display device 10 further includes a support portion that supports the display portion 12, and the support portion is fixedly installed on a road surface, and includes a support column 18 that fixes the display portion 12. You. In addition, the laser oscillation device 14 is installed below the column 18.

FIG. 6 is an exploded perspective view of the display device shown in FIG. As shown in FIG. 6, the display unit 12 includes a surface plate 22 having a display portion on which a predetermined pattern is formed, a back plate 24, and a side plate 26 covering the outer peripheral surfaces of the surface plate 22 and the back plate 24. Be composed. A plurality of optical fibers 30 are embedded in the surface plate 22, and a plurality of light diffusion ends 30a of the optical fiber 30 are exposed to the display portion side to form a predetermined pattern. The bundle of optical fibers 30 buried so that one end is exposed on the surface plate 22 is connected to the laser plate 14 without being exposed to the outside when assembling the display device. Each has through holes 24a, 18a, and 18b through which a bundle of optical fibers 30 passes. The through holes 24a and 18a are formed so that the through holes correspond to each other when the display device is set up. The bundle of optical fibers 30 buried so that one end is exposed on the surface plate 22 passes through the through hole 24 a of the back plate 24, and passes through the through hole 18 a of the column 18 corresponding to the through hole 24 a. Street, within column 18. Further, the bundle of optical fibers 130 passes through the through hole 18 b through the inner space of the support 18, and is connected to the laser oscillation device 14 installed below the support 18. An example of the display device according to the first embodiment of the present invention is configured as described above.

Next, the operation of an example of the display device according to the first embodiment of the present invention will be described with reference to FIGS. The laser oscillation device 14 receives a supply from a power supply and oscillates a predetermined laser. The oscillated laser beam is supplied to the laser oscillator 14. 0 Transmitted to the connected optical fiber 30. The laser beam follows the route where the optical fiber 30 is installed, reaches the surface plate 22 buried so that the light diffusion end 30a is exposed, and is irradiated from the light diffusion end 30a. The laser beam each spreading end 3 0 a force ^ injection may each optical diffusing end ₃ 0 a are developed, if the light diffusing end 3 0 a is transparent or semitransparent light of the covering member, a further covering member Let it develop color. Thus, a predetermined light display pattern formed from the plurality of light diffusion ends 30a is generated. Thereby, even in darkness such as at night, the light display pattern formed by the light diffusion edge can be clearly recognized by the observer. Subsequently, the laser beam goes straight through the atmosphere. If there are foreign objects such as ice, fog, rain, snow, smoke, etc. in the direction of the laser beam, the laser beam will go straight by coloring them. In other words, if there is snow, rain, snow, or water on the light display pattern, or if there is a foreign substance floating in the atmosphere, the range of the sharp traveling path peculiar to the laser beam will be determined according to the presence of this. This produces intermittent or continuous streaks of visible light. The number of light streaks changes according to the number of laser beams. Even when the laser beam is in a region other than visible light, it also causes snow, ice, and floating foreign substances in the direction in which the laser beam travels to develop color, causing intermittent or continuous sharp lines of light. For example, if the laser beam is infrared light, it will produce red light streaks. As a result, even when the display unit has a shield such as snow, snow and snow water, etc., a sharp streak of light is generated in the snow and ice on the display pattern within the range of the laser beam travel path. Thus, the light display pattern can be clearly seen by an observer. In addition, even in a situation where visibility is obstructed, sharp light streaks are generated in the space on the light display pattern within the range of the laser beam's travel path due to the presence of foreign substances floating in the atmosphere. The light display pattern can be more clearly recognized by the observer. In addition, since a plurality of optical fibers connected to the laser light source are used, the display function required for the display device can be exhibited with extremely low electric energy, which is economical. In addition, maintenance and management are extremely easy because the use of an optical fiber that does not easily deteriorate over time is freed from problems such as cutting. The laser oscillator 14 is controlled by the controller or remote control. If it is, the light display pattern can be generated according to the brightness of the outside world, the time zone, and the weather condition. In addition, the display device according to the first aspect of the present invention can provide a movement to an optical display pattern. As described above, the display device according to the first aspect of the present invention can be used for various roads, railway tracks, sidewalks such as shopping streets, wall surfaces, In addition, even if it is dark in places where display means is required, such as the sea surface such as a sea route, or if there is a shield such as snow or ice on the display part of the display device, In addition, the display device according to the first aspect can provide an epoch-making display means that can check the content of the display device even when the display device is poor. It can function as a display means with energy and is very easy to maintain.

Next, a display system according to a second aspect of the present invention will be described. FIG. 7 is a schematic diagram illustrating an example of a display system according to the second embodiment of the present invention. As shown in FIG. 7, the display system 40 includes a plurality of display devices 42, and an electrical distribution line connected to the power supply device 44 and connecting the power supply device 44 and each display device 42. 4 and 6. Examples of the type of the electric supply device 44 include a solar cell, a wind power generator, a storage battery, and other power sources, and these may be used in combination. In the electric supply device 44, a voltage capable of supplying electricity required for each display device 42 to oscillate a predetermined laser is appropriately set to each display device 42. The voltage supplied to each display device 42 is not particularly limited. From the viewpoint of improving economy, a low voltage is preferable. For example, a predetermined laser can be oscillated in each display device 42 at a voltage of 1.5 V to 15 V. Further, the voltage supplied to each display device 42 may be set to a high voltage depending on the installation location of each display device, the application, and the like. The location of the electric supply device 44 is not particularly limited as long as it can supply electricity to each display device 42 via the electric distribution wiring 46. Place where each display device 42 is installed, for example, on various roads, railway tracks, sidewalks such as shopping streets, plazas, parking lots, bridges, runways and other road surfaces, wall surfaces, and sea surfaces such as sea routes, etc. Alternatively, each of the display devices 42 may be installed at a location remote from the installation location. The electric distribution wiring 46 may be any as long as it can supply necessary electricity from the electric supply device 44 to each display device 42. 2 is not particularly limited. Known ones can be widely used. For example, a known material used for an electric wire can be used. The electric distribution wiring 46 may be used by being buried in a place where each display device 42 is installed, or may be used by being fixed to a road surface, a wall surface or the like in these places. In addition, existing electric wires may be used. As shown in FIG. 7, the electrical distribution wirings 46 are branched according to the number of the display devices 42, and each end 46 a is connected to each display device 42. One end 46a may be connected to each display device 42, or a plurality of ends 46a may be connected. As shown in FIG. 7, each display device 42 is connected to the display unit 12 and one end 46 a of one end of the electric distribution wiring 46, and receives electricity from the end 46 a to receive the electricity. And a laser oscillation device 14 that oscillates a laser. In the example of FIG. 7, each display device 42 is further provided with a support portion for supporting the display portion 12, and the support portion is composed of a support column 18. As shown in FIG. 7, each display device constituting the display system according to the second embodiment of the present invention may have a support portion for supporting the display portion 12 or may have a support portion. It may not be. In the case of having a support portion, the support portion may be composed of a plurality of support members, for example, a column and an intermediate support cylinder horizontally provided on the column, or a single support member, for example, a diagram. As shown in FIG. 7, it may be composed of only the columns. Further, in the example of FIG. 7, the laser oscillation device 14 is provided on the lower side surface of the column, but the present invention is not limited to this. For example, it may be fixed to the wall surface of the support, or may be installed above the support. Further, it may be provided in the support, in the joint between the support and the intermediate support tube, in the intermediate support, or in the display unit. Further, it may be provided outside the display device. The laser oscillation device 14 oscillates a laser having a predetermined wavelength by the electricity supplied from the terminal 46 a of the electric distribution wiring 46. The laser oscillation device 14 may supply electricity directly through the electric distribution wiring 46 or may supply the electricity via an appropriate transformer. Each display device 42 may have an electric supply device so as to perform a display function even in an emergency such as a power failure. The description of each display device 42 is the same as the description of the display device according to the first embodiment of the present invention except for the method of supplying electric power to the laser oscillation device. 3 Same as above. As described above, the display system according to the second aspect of the present invention includes various roads, railways, sidewalks such as shopping streets, plazas, parking lots, bridges, road surfaces such as runways, wall surfaces, and sea surfaces such as sea routes. In places where display means are required, such as in the dark, when there is a shield such as snow or ice on the display part of the display device, or when visibility is poor, Even if there is, it is possible to provide a revolutionary display means system capable of confirming the contents of the display device. In addition, the display system according to the second aspect can cause each display device to function as a display means with extremely low electric energy, and is very easy to maintain.

Next, a display system according to a third embodiment of the present invention will be described. FIG. 8 is a schematic diagram showing an example of the display system according to the third embodiment of the present invention. As shown in FIG. 8, the display system 50 includes a plurality of display devices 52 and a laser oscillator 54. Each of the display devices 52 is connected to a laser oscillator via a bundle of optical fibers 56. Connected to 5 4. The laser oscillation device 54 supplies electricity from a power supply (not shown) to oscillate a predetermined laser. In the laser oscillation device 54, an output capable of supplying a laser of an output necessary for each display device 52 to function as a display device is appropriately set. The laser output distributed to each display device 52 can be appropriately selected depending on the installation location, use, and the like of each display device. If necessary, a laser compliant with the JISC6802 radiation safety standard for laser products can be oscillated. Each display device 52 can sufficiently function as a display device even if the distributed laser output is low. It should be noted that a device having a large output can be used depending on the installation location, use, and the like of each display device. In addition, as the laser oscillation device 54, a device that oscillates a laser that does not affect the human body or has a very low possibility of affecting the human body when the laser may hit the human body, or when necessary, is used. be able to. For safety, comply with the JISC 68 2 emission safety standards for laser products. For example, those having a longer wavelength than the radiation region such as X-rays can be used. For example, lasers in the ultraviolet, visible, infrared, and microwave regions can be used, providing high security, economy, and low technical effort. 4 From the viewpoint of elimination, for example, a laser having a wavelength of 500 nm to 100 nm can be used. In addition, a laser in a visible light region having a desired color can be supplied according to the installation location, use, and the like of each display device 52. For example, a laser oscillation device that oscillates three primary colors of light can be used in combination to obtain a desired color. Further, the laser oscillation device 54 may have a controller for adjusting the wavelength or the output. In addition, the laser vibration device 54 may include a control device so as to oscillate the laser at a predetermined time interval, or may be controlled by remote control. For example, the laser can be controlled to oscillate according to the time zone, the brightness of the outside world, or the weather condition of the installation location of the display device. Further, a part of the bundle of optical fibers 56 connected to the laser oscillation device 54 is selected, and a laser beam is transmitted only to the selected group. The control can be performed at predetermined time intervals or continuously. In this way, the transmission of the laser beam itself can be adjusted by each display device 52 or by the light diffusion end forming the optical display pattern of each display device 52. The location of the laser oscillation device 54 is not particularly limited as long as the laser can be supplied to each display device 52 via the bundle of optical fibers 56. It may be installed on the place where each display device 52 is installed, for example, on the road surface such as various roads, railroad tracks, sidewalks of shopping streets, wall surfaces, sea routes, etc., or away from the place where each display device 52 is installed. It may be installed at the place. The optical fiber constituting the optical fiber bundle 56 can be any material that can supply a required laser from the laser oscillation device 54 to each display device 52, and is made of a material, a length, and a thickness. There is no particular limitation on the type and the like, and known ones can be used. For example, a plastic optical fiber (P0F) or the like can be used. The bundle of optical fibers 56 may be used by being buried in a place where the display device 52 is installed, or may be used by being fixed to a road surface or a wall surface in these places.

As shown in FIG. 8, for example, a laser is introduced from the laser oscillation device 54 with a bundle of optical fibers corresponding to the number of the display devices 52, and By connecting the ends 56 a of the bundle of hoppers 56, a necessary laser can be supplied to each display device 52. As shown in FIG. 8, each display device 52 has a display unit 12, and the display unit 12 constitutes an end 56 a which is one end of the bundle of optical fibers 56. A plurality of optical fibers are embedded, and a plurality of light diffusing ends of the optical fiber are exposed on the display portion side to form a predetermined pattern. In the example of FIG. 8, each of the display devices 52 is further provided with a support portion for supporting the display portion 12, and the support portion is configured by a support column 18 force. As shown in FIG. 8, each of the display devices constituting the display system according to the third embodiment of the present invention may have a support for supporting the display unit 12 or may have a support. It may not be. In the case of having a support portion, the support portion may be composed of a plurality of support members, for example, a column and an intermediate support tube horizontally provided on the column, or a single support member, for example, FIG. As shown in the figure, it may be composed of only columns. In addition, the optical fiber bundle 56 with the light diffusing end embedded in the display unit 12 should be connected to the laser oscillator 54, and if the display unit 12 and the support unit are provided, they will be connected to the support unit. May have a through-hole formed as appropriate. For example, as shown in FIG. 8, a bundle of optical fibers 56 may be introduced from the bottom surface of the column 18 and transmitted along the inner space of the column 18 to be connected to the display unit 12 or to the column 18. It may be connected to the display unit 12 along the outer wall surface of the display. The description of the display device 52 is the same as the description of the display device according to the first embodiment of the present invention except for the method of supplying the laser. As described above, the display system according to the third aspect of the present invention includes various roads, railway tracks, sidewalks such as shopping streets, plazas, parking lots, bridges, runways and other road surfaces, wall surfaces, and sea surfaces such as sea routes. In places where display means are required, such as in the dark, when there is a shield such as snow or ice on the display part of the display device, or when visibility is poor, In addition, it is possible to provide an innovative display means system capable of confirming the contents of the display device. In addition, the display system according to the third aspect allows each display device to function as a display means with extremely low electric energy, and is very easy to maintain. The display device and the display system according to the present invention have been described above, but the present invention is not limited to the above examples. It goes without saying that various modifications and changes may be made without departing from the spirit of the present invention. The invention's effect

As described above, according to the present invention, even in the case where the view is obstructed, even in the case where the display section of the display device has an obstruction such as snow or ice, Also, the contents of the display device can be clearly seen by an observer. Further, according to the present invention, since a laser is used, the function of the display device can be exhibited with extremely low electric energy. In addition, since an optical fiber that does not easily deteriorate over time is used, complicated work such as replacement of a light bulb or the like by cutting is eliminated, and maintenance and management becomes extremely easy. BRIEF DESCRIPTION OF THE FIGURES

FIGS. 1A and 1B are schematic diagrams illustrating an example of a display device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the display device shown in FIG.

FIG. 3 is a schematic partial cross-sectional view of a display unit in FIG.

FIG. 4 is a partially enlarged view of FIG. 3;

FIGS. 5A and 5B are schematic diagrams showing another example of the display device according to the first embodiment of the present invention. FIGS.

6 is an exploded perspective view of the display device shown in FIG.

FIG. 7 is a schematic diagram illustrating an example of a display system according to a second embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating an example of a display system according to a third embodiment of the present invention.

[Explanation of symbols]

1 0 Display device Display

Laser oscillation device

Intermediate support tube

a, 16 b, 18 a, 18 b, 24 a

Power generator

Surface plate

Back plate

Side plate

Optical fiber

a Light diffusion edge

Display system

Display device

Electric supply device

Electrical distribution wiring

Display system

Display device

Laser oscillation device

Optical fiber bundle

a End of a bundle of optical fibers.

Claims

The claim includes a display unit, a laser oscillation device, and a plurality of optical fibers, wherein the plurality of optical fibers are embedded in the display unit, and one end that is a light diffusion end is provided on the display unit. A display device exposed on one surface and having the other end connected to the laser oscillation device, wherein a pattern is formed on the one surface of the display unit by the light diffusion end.

2. A display system comprising: a plurality of display devices; and an electric supply device, wherein the plurality of display devices are connected to the electric supply device via electric distribution wiring, wherein the display device includes: a display unit; A laser oscillation device connected to the electrical distribution wiring; and a plurality of optical fibers, wherein the plurality of optical fibers are embedded in the display unit, and one end serving as a light diffusion end is connected to the display unit. A display system exposed on one surface of the display unit, the other end of the display unit being connected to the laser oscillation device, and a pattern formed on the one surface of the display unit by the light diffusion end.

3. A display system comprising: a plurality of display devices; and a laser oscillation device, wherein the plurality of display devices are connected to the laser oscillation device via an optical fiber.

The display device has a display unit, wherein the optical fiber is embedded in the display unit, and one end serving as a light diffusion end is exposed on one surface of the display unit, and A display system in which a pattern is formed on the one surface of the display unit.