JP6042839B2 - Traffic sign projection system - Google Patents

Description

  The present invention relates to a traffic sign projection system.

  Many traffic signs are installed on toll roads such as general roads and expressways for the purpose of safe driving of vehicles and prevention of accidents. Traffic signs are signboard-type “road signs” that display circular speeds and triangles on pillars erected from the side of the road and display speed limits on the board, and “stop” and “ "Road markings" in which characters such as "parking prohibited" or lane markings are painted directly with white or yellow paint, and installed at the toll gates at intersections and toll roads, indicate whether the vehicle can proceed It can be roughly divided into “signal signs” that are displayed with green and red signals.

  Here, since road markings are those in which characters and figures are directly painted on the road surface on which the vehicle travels, the letters and figures may be peeled off due to friction with tires, etc., or may be soiled by tire marks. It was. As a result, the visibility of road markings may deteriorate over time. Also, in cold regions, the road surface is covered with snow, which reduces the visibility of the lane markings that divide the lane, and may hinder safe driving, such as overhanging on the opposite lane or being too close to the side of the road. was there. On the other hand, in the case of a signboard-type road sign, since characters and figures are directly painted on the surface of the plate material, there is a possibility that the visibility may be deteriorated due to aged deterioration such as peeling of paint or fouling.

  In addition, there are many road signs and road markings at places where multiple roads merge or branch, such as near toll gates, interchanges, junctions, etc. In the case of signs and road markings, the driver could overlook necessary information.

  In addition, multiple toll gates are installed in parallel at the toll gate, and the direction to enter the toll road or the direction to exit from the toll road can be switched according to the traffic volume during morning and evening hours, weekdays, and holidays. Is going. In this case, the red or green color installed above the toll gate, or a signal sign with a graphic “○” or “×” indicates whether or not it is possible to enter the toll gate. Visibility may be reduced depending on the time of day. Such a decrease in the visibility of signal signs is often generated near intersections of general roads.

  Therefore, there is a demand for the development of a system that has improved visibility of traffic signs and does not deteriorate over time.

  Furthermore, in the case of conventional road markings and signboard-type road signs, since the characters and figures are directly painted on the road surface and the surface of the plate material, the contents of the markings cannot be changed. Therefore, for example, there is a demand for development of a system that can provide a driver with information that changes in real time, such as the occurrence of an accident or traffic jam, and the weather condition of a destination.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a traffic sign projection system in which the visibility of a sign is good, there is no deterioration over time, and the contents of the sign can be changed.

  In order to solve the above problems, a traffic sign projection system according to the present invention includes: a sign projection unit that projects a sign pattern of a traffic sign on a projection surface by irradiating a laser; A background projection unit for projecting a background pattern, which is a background of the image, onto the projection surface by superimposing the pattern on the sign pattern, and storing the sign data of the sign pattern and the background data of the background pattern in association with a plurality of traffic signs A data storage unit, and a system control unit including a data transmission unit that transmits the marker data to the marker projection unit and transmits the background data to the background projection unit.

  Here, the sign projection unit projects a traffic sign composed of characters and figures as a sign pattern by irradiating a laser, and is a laser irradiation apparatus capable of emitting a monochromatic laser, or an RGB laser. Such a laser irradiation apparatus that can irradiate multicolor lasers can be used. Here, the RGB laser is provided with three types of laser diodes that can irradiate lasers of the three primary colors of red, green, and blue, and by changing the irradiation output of the laser emitted from each laser diode, The laser to irradiate can be of various colors. Therefore, it is possible to reproduce and project colors used in conventional traffic signs such as yellow and black other than the three primary colors. Here, since the laser is highly directional light, it can project the irradiated characters and figures onto the projection surface without scattering. Therefore, the laser having such high visibility is suitable for projecting traffic signs and allowing the driver to grasp the contents. Here, the laser is irradiated as a very small point. Therefore, a laser irradiation apparatus such as an RGB laser scans the projection plane at thousands to tens of thousands of points per second by changing the laser irradiation angle by using a provided mirror or the like, so that the human retina can be scanned. Using the afterimage phenomenon, the sign pattern of the projected traffic sign is visually recognized.

  On the other hand, the background projection unit has, for example, a spotlight using a halogen light as a light source. Here, the color of the projection surface is not necessarily constant. For example, when projecting on a road surface, although it is generally light gray or dark gray due to asphalt pavement, the road surface may become dirty due to dirt on the road surface, wetness due to rain, lack of light quantity at night, snow accumulation, etc. The color is not constant even in the same place. Therefore, by projecting the background pattern by the background projection unit, the sign pattern can be clearly projected on the background pattern, and the visibility is improved. Note that the spotlight of the background projection unit may have a light shielding function for limiting the light irradiation direction, and the background pattern can be adjusted to, for example, a trapezoidal shape or a square shape by the light shielding function. .

  On the other hand, the system control unit is for performing control for projecting a sign pattern and a background pattern, and stores sign data for the sign pattern and background data for the background pattern in association with a plurality of traffic signs. At the same time, the stored sign data and background data are transmitted separately to the sign projection unit and the background projection unit, respectively. Here, the system control unit may use, for example, a combination of a general-purpose personal computer in which projection operation software for performing the above-described processing is installed and a laser control device that controls an RGB laser or the like. it can.

  Therefore, according to the traffic sign projection system of this configuration, the sign pattern of the traffic sign is projected onto the projection plane by the laser. Furthermore, since the background pattern is projected superimposed on the sign pattern, for example, the projected sign pattern is not greatly affected by the visibility of the laser, such as when the projection surface is wet or at night. Can be stably recognized. In addition, since the marker pattern and the background pattern are projected, the marker pattern and the background pattern are not deteriorated due to friction or the like, and can be projected onto the snow surface even when the projection surface is covered with snow. In addition, favorable visibility can be maintained by adjusting the color, brightness, and the like of each of the marker pattern and the background pattern to be projected according to the state of the projection surface such as nighttime or snow cover. Furthermore, since the marker pattern and the background pattern projected by the system control unit can be arbitrarily changed, information such as the occurrence of an accident and weather conditions can be displayed on the projection surface in real time. Here, examples of the “projection surface” include a road surface, a front surface of an opaque plate material, a back surface of a transparent plate material, and a wall surface of a structure such as a building or a bridge / pier.

  Furthermore, the traffic sign projection system according to the present invention has, in addition to the above configuration, “the spotlight includes a red spotlight capable of emitting red light and a green spotlight capable of emitting green light, and the background projection unit Includes a dimming unit that receives the background data transmitted from the data transmission unit and adjusts the irradiation output of the red spotlight and the green spotlight based on the received background data. " It doesn't matter.

  In the traffic sign projection system of this configuration, the spotlight for projecting the background pattern is composed of a red spotlight and a green spotlight. For this reason, it is possible to project a background pattern made of monochromatic light of red or green on the entire projection surface. Here, in general traffic signs, red indicates some regulations such as “danger”, “stop”, “no entry”, etc., while green indicates safe such as “advance”, “access allowed”, etc. It shows the state. Therefore, a traffic sign having a background pattern displayed in these colors is easy for the driver to understand the display content empirically and sensuously. Therefore, a driver who visually recognizes the sign pattern and the background pattern from the distance approaches the projected position of the sign pattern and the background pattern while predicting or grasping the approximate contents. You can travel.

  In addition to the above configuration, the traffic sign projection system according to the present invention may include: "The system control unit is a projection control unit electrically connected to the sign projection unit and the background projection unit; and a position separated from the projection control unit. A projection operation unit installed on the data storage unit, and the projection control unit transmits the data storage unit and the marker data and the background data stored in the data storage unit via a communication network. The projection control unit transmits the received marker data and the background data to the control projection unit, and transmits the received marker data to the marker projection unit. And the data transmission unit that transmits the background data to the background projection unit ”.

  In the traffic sign projection system of this configuration, the system control unit includes a projection operation unit and a projection control unit, which are connected to each other via a communication network. In this way, for example, a projection operation unit is installed in a management center that manages toll roads such as expressways, or in a management building that is located away from the toll gate. Projecting sign patterns and background patterns remotely by installing a projection control unit near the junction / junction of junctions and junctions, or at toll gates at toll gates And the projected sign can be switched. The communication network may be a wired system using an optical communication cable or the like, or a wireless system using a wireless LAN device or the like. For example, if the distance between the projection control unit and the projection operation unit is relatively short, such as a toll gate such as a toll road and a management building that manages the toll gate, a wireless communication network is adopted. It is particularly preferred to do this.

  The traffic sign projection system of the present invention has the above-described configuration, wherein “the projection plane is a road surface, and the sign pattern and the background pattern indicate whether a vehicle can enter the toll gate”. It does not matter.

  In the traffic sign projection system of this configuration, a sign pattern and a background pattern are used as a kind of signal sign indicating whether or not the user can enter the toll gate. Thereby, the visibility of the signal sign at the toll gate is high, and it is possible to prevent an accident due to the erroneous entry of the vehicle that occurs particularly near the toll gate of the toll gate.

  The traffic sign projection system according to the present invention has, instead of the above configuration, “a display plate having translucency, and the sign projection unit and the background projection unit respectively receive the light from the laser and the spotlight. And irradiating the back surface of the display plate as the projection surface ”.

  In this configuration, the back surface of the display plate material is irradiated with laser or spotlight light so that the marker pattern and the background pattern transmitted through the display plate material are visually recognized. Therefore, the sign projection unit and the background projection unit project the sign pattern and the background pattern based on the sign data and the background data when the traffic sign to be visually recognized is inverted. In addition, as the “display plate”, a resin or glass flat plate having translucency but not transparent can be used, and a layer for adjusting diffusion and reflection of light, for absorbing natural light. A layer of the above may be provided.

  According to the traffic sign projection system of the present invention, a signboard-type sign can be a sign with good visibility without fear of deterioration over time. In addition, since the contents to be displayed can be changed, it is possible to provide information according to an unexpected situation in real time, such as the occurrence of an accident or traffic regulation due to weather. Moreover, if it is a vehicle-mounted sign, it can move to an accident occurrence site, a construction site, etc., and provide information according to the site.

  As described above, according to the present invention, it is possible to provide a traffic sign projection system in which the visibility of a sign is good, there is no deterioration over time, and the contents of the sign can be changed.

It is the schematic diagram seen from the upper side which shows schematic structure of the traffic sign projection system of 1st embodiment of this invention. It is the schematic diagram seen from the side which shows schematic structure of the traffic sign projection system of FIG. It is a block diagram which shows the functional structure of the traffic sign projection system of FIG. It is explanatory drawing which shows an example of the sign pattern and background pattern which are projected on a road surface, (a) Progression prohibition, (b) Progress possible. It is explanatory drawing of (a) speed limit and (b) prohibition of rotation which show another example of the sign pattern projected on a road surface, and a background pattern. It is a schematic block diagram of the traffic sign projection system of 2nd embodiment of this invention. It is a block diagram which shows the functional structure of the traffic sign projection system of FIG. It is explanatory drawing which shows an example of the marker pattern and background pattern of a vehicle-mounted sign. It is a schematic block diagram of the traffic sign projection system of the modification of 2nd embodiment. (A)-(d) all are schematic block diagrams of the traffic sign projection system of 3rd embodiment of this invention. (A) Explanatory drawing of projection by the traffic sign projection system of other embodiment, and the schematic block diagram of the traffic sign projection system of Fig.11 (a).

  Hereinafter, a traffic sign projection system 1 (hereinafter simply referred to as “projection system 1”) according to a first embodiment of the present invention will be described with reference to FIGS. Here, the projection system 1 of this embodiment is installed in the vicinity of the toll gate 2 that passes when entering the toll road and when flowing out of the toll road, and in each of the plurality of toll gates 3 arranged in parallel, A sign pattern 4 indicating the traveling direction of the vehicle is projected onto the road surface R. Here, the sign pattern 4 in the projection system 1 is projected onto a road surface R several tens of meters in front of the toll gate 3, and is a traffic sign having both functions of “road marking” and “signal sign”. is there.

  As shown in FIGS. 1 to 5, the projection system 1 of the present embodiment irradiates a sign projection unit 5 that irradiates a laser L to project a traffic sign sign pattern 4 onto a road surface R, and spotlight light. A background projection unit 7 for projecting the background pattern 6 serving as the background of the sign pattern 4 on the road surface R in a superimposed manner on the sign pattern 4, a plurality of sign data 14 for the sign pattern 4, and a plurality of background data 15 for the background pattern 6 A data storage unit 16 stored in correspondence with the traffic signs, and a system control unit 10 having a data transmission unit 19 that transmits the sign data 14 to the sign projection unit 5 and transmits the background data 15 to the background projection unit 7; It has. The system control unit 10 is installed at a position separated from the projection control unit 8 and the projection control unit 8 electrically connected to the sign projection unit 5 and the background projection unit 7, and is connected to the projection control unit 8 and the wireless communication network. And a projection operation unit 9 connected via N. Here, the wireless communication network N corresponds to the “communication network” in the present invention.

  More specifically, the sign projection unit 5 irradiates the laser L with respect to the road surface R obliquely from above, so that the laser projection surface is placed on the road surface R at the upper part of each charge gate 3 (see FIG. 2). It is installed in the state facing toward. As the marker projection unit 5, a laser irradiation device including an RGB laser including three laser diodes each capable of irradiating laser L of three colors of red, green, and blue is used. By adjusting each irradiation output of the laser L with high directivity irradiated from the laser diode, the sign pattern 4 adjusted to an arbitrary color can be projected onto the road surface R. In this embodiment, as the marker projection unit 5, a laser capable of outputting each laser L having a wavelength of red 635 nm / 300 mW, green 532 nm / 300 mW, blue 450 nm / 1000 mW and maximum output is used. As a result, the marker pattern 4 can be irradiated to a position several tens of meters ahead of the charge gate 3. Further, the sign projection unit 5 is connected to the projection control unit 8 by an ILDA cable standardized by an international laser display association (ILDA) which is an international organization of laser irradiation equipment. Therefore, high compatibility is achieved by using the projection control unit 8 and the sign projection unit 5 capable of output control according to the ILDA standard.

  On the other hand, the background projection unit 7 includes a red spotlight 11 capable of emitting red light obliquely from above the road surface R, and a green spotlight 12 capable of emitting green light obliquely from above the road surface R. Are connected to the red spotlight 11 and the green spotlight 12, and controls the turning on and off of the respective spotlights 11 and 12, and the irradiation light quantity of the spotlights 11 and 12 is controlled between 0% and 100%. And a light control unit 13. Here, as shown in the figure, the pair of red spotlights 11 and green spotlights 12 are arranged in a state where the sign projection unit 5 installed at the upper part of the gate is sandwiched from the left and right (corresponding to the up and down direction in FIG. 1). It is installed. Each of the red spotlight 11 and the green spotlight 12 uses a 750 W output halogen light as a light source. In order to irradiate the red and green background patterns 6, a color filter (illustrated) is provided around the halogen light. Not covered). Furthermore, the red spotlight 11 and the green spotlight 12 have a light shielding function including a plurality of light shielding plates that shield a part of the light, and the shape of the background pattern 6 projected on the road surface R is the shape in this embodiment. It has a quadrangular shape (see FIG. 4). The background projection unit 7 is installed for each charge gate 3 in the same manner as the sign projection unit 5, and each dimming unit 13 is connected via a DMX cable conforming to the DMX standard, which is a unified standard for controlling lighting equipment. Are connected to the projection control unit 8.

  Further, the system control unit 10 includes a data storage unit 16 that stores the sign data 14 related to the sign pattern 4 projected on the road surface R and the background data 15 related to the background pattern 6 in association with a plurality of traffic signs, A data extraction unit 21 that extracts the sign data 14 and the background data 15 from the data storage unit 16 based on the operator's input, and the projection control unit 8 that extracts the extracted sign data 14 and the background data 15 via the wireless communication network N. And a plurality of sign projection units 5 and a background projection unit 7 installed for each toll gate 3 while being installed apart from the projection operation unit 9. Each of the indicator data 14 and the background data 15 transmitted from the projection operation unit 9 through the wireless communication network N is connected to the (light control unit 13). Control side communication unit 18 to and,, a label data 14 received in the label projection unit 5, and a projection control unit 8 having a data transmission unit 19 for transmitting respective background projection unit 7 background data 15.

  The projection control unit 8 is installed on the toll gate 2 side where a plurality of toll gates 3 are arranged side by side. On the other hand, the projection operation unit 9 is installed in a management building 22 built at a location away from the toll gate 2. Yes. The projection control unit 8 has a function of transmitting the marker data 14 and the background data 15 to the plurality of marker projection units 5 and the background projection unit 7 and controlling each of them. A projection operation unit 9 and a wireless communication network N are constructed through a wireless router 20 connected to the projection control unit 8. On the other hand, the projection operation unit 9 has a general-purpose personal computer having a storage device and a central processing unit that performs processing according to a program stored in the storage device. The projection control unit 8 in the projection system 1 of the present embodiment is stored in the storage device. Operation control software for controlling the configuration of the background projection unit 7 and the sign projection unit 5 is installed. Thereby, the sign pattern 4 and the background pattern 6 projected on the road surface R can be projected by remote control from the management building 22 away from the toll gate 2, and the projected traffic sign can be switched.

  By the projection system 1 having the above configuration, for example, a sign pattern 4 and a background pattern 6 are projected onto the road surface R in front of the toll gate 3 of the toll gate 2 as shown in FIGS. 4 (a) and 4 (b). can do. More specifically, the operator activates the operation control software installed in the projection operation unit 9 installed in the management building 22 and stores the sign data 14 and the background data 15 of the traffic sign to be projected as input. After extraction from the unit 16, the marker data 14 and the background data 15 are transmitted to the projection control unit 8 through the operation side communication unit 17. Here, in conjunction with the transmission of the sign data 14 and the background data 15, data such as a gate identification symbol (not shown) for specifying the charge gate 3 to be projected is also transmitted to the projection control unit 8 at the same time. As a result, the sign pattern 4 to be projected can be instructed by remote control from the management building 22 away from the toll gate 2. Further, since the sign patterns 4 to be individually projected onto the plurality of charge gates 3 can be selected, the projection of the sign patterns 4 can be centrally managed at one place.

  On the other hand, the projection control unit 8 receives the marker data 14 and the background data 15 transmitted from the projection operation unit 9 via the wireless communication network N, and the marker installed at the toll gate 3 specified as the projection target. The sign data 14 is transmitted to the projection unit 5 and the background data 15 is transmitted to the dimming unit 13 of the background projection unit 7 via the data transmission unit 19 separately. Thus, the sign pattern 4 indicating the traffic sign is projected onto the road surface R from the sign projection unit 5 that has received the sign data 14. At the same time, the light control unit 13 that has received the background data 15 turns the red spotlight 11 or the green spotlight 12 on and off, and controls the amount of irradiation light. Projected onto the surface R. As a result, the driver of the vehicle moving along the traveling direction (from the right to the left in FIG. 1) can visually recognize the sign pattern 4 and the background pattern 6 marked on the road surface R.

  Here, FIG. 4 (a) shows "entrance prohibition" prohibiting entry to toll gate 3, and a sign of a figure with a long bar in "O", like a sign-type road sign. A pattern 4 is projected from the sign projection unit 5. Further, the dimming unit 13 performs control to turn on the red spotlight 11 and set the output of the irradiation light amount to 100%, while turning off the green spotlight 12 and set the output of the irradiation light amount to 0%. Yes. As a result, a sign pattern 4 made up of “o” and a long bar figure superimposed on the red background pattern 6 is displayed in front of the charge gate 3. Therefore, the driver who drives the vehicle entering the toll gate 3 senses that there is some restriction by visually recognizing the red background pattern 6 first, even from a place away from the toll gate 3. For example, an operation of decelerating by stepping on a brake can be performed. Then, by visually recognizing the sign pattern 4 composed of the graphic indicating the entry prohibition superimposed on the background pattern 6, it is confirmed again that the charge gate 3 is prohibited from entering, and it moves to the charge gate 3 that can be entered. can do.

  On the other hand, FIG. 4 (b) shows “entrance allowed” allowing entry to the charge gate 3, and a sign pattern 4 in which a plurality of arrow-shaped figures are arranged in parallel is projected from the sign projection unit 5. In addition, the dimming unit 13 controls the green spotlight 12 to be turned on and the output of the irradiation light amount to be 100%, while the red spotlight 11 is turned off and the output of the irradiation light amount is set to 0%. Yes. As a result, a sign pattern 4 made up of a plurality of arrows superimposed on the green background pattern 6 is marked before the charge gate 3. As a result, the driver who drives the vehicle that is about to enter the toll gate 3 can enter the sensory sensation by visually recognizing the green background pattern 6 first, even from a place away from the toll gate 3. While approaching toll gate 3 while detecting that there is a certain, by visually confirming the sign pattern 4 superimposed on the background pattern 6, it is confirmed that the toll gate 3 can enter again, and passes through the toll gate 3 can do.

  As a result, the sign pattern 4 and the background pattern 6 projected on the road surface R can indicate whether or not the user can enter the toll gate 3, and the driver can recognize the information marked on the road without moving the line of sight. be able to. Further, since the sign pattern 4 is projected on the background pattern 6 projected on the road surface R, the dark road surface R at night, the wet road surface R, or the road surface R covered with snow, etc. Even if the state of the road surface R is different, the visibility of the sign pattern 4 is not impaired. In addition, since the display is based on the projection of the laser L, the visibility is not impaired due to aging deterioration such as peeling of the paint unlike the conventional road marking. Furthermore, the sign pattern 4 and the background pattern 6 projected onto the road surface R can be quickly switched by an operation from the projection operation unit 9. Therefore, as described above, when projection is performed on the road surface R at a position in front of the toll gate 3, the number of toll gates 3 permitting entry of the vehicle is appropriately changed according to increase or decrease in traffic volume in the morning and evening. be able to. Further, by changing the projected display, it is possible to sequentially provide information useful for driving the vehicle, such as information on accidents and traffic jams, to the driver. The marker pattern 4 to be projected may be stored in advance in the data storage unit 16 of the projection operation unit 9 or may be appropriately created using operation control software.

  In addition, since the background pattern 6 can be projected by switching the color between red and green, it is possible for the driver who drives the vehicle to recognize the presence or absence of any regulation from a distance with the same feeling as a signal sign. Easy to understand the contents of traffic signs.

  Next, the projection system 1b according to the second embodiment will be described with reference to FIGS. Here, the case where this invention is applied to a vehicle-mounted traffic sign is illustrated. In addition, about the structure similar to 1st embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The projection system 1b includes a display board B having translucency, a sign projection unit 5 for projecting a sign pattern of a traffic sign by irradiating a back surface B1 of the display board B with a laser, and for displaying spotlight light. A background projection unit 7 that irradiates the back surface B1 of the plate material B and superimposes a background pattern as a background of the sign pattern onto the sign pattern and projects the system, and a system control unit 10 that controls the sign projection unit 5 and the background projection unit 7 It is equipped with. As in the first embodiment, the spotlight includes a red spotlight 11 and a green spotlight 12, and the background projection unit 7 includes a dimming unit 13.

  More specifically, the display board B is made of milky white acrylic resin, and is erected on the rear part of the cargo bed with the front face B2 facing the rear of the vehicle T. The sign projection unit 5 is arranged in the front part of the loading platform with the laser irradiation direction directed to the back surface B1 of the display plate B. The background projection unit 7 is also arranged in the front part of the loading platform with the light irradiation direction of the spotlight directed toward the back surface B1 of the display plate B. The back surface B1 of the display plate B corresponds to the “projection surface” of the present invention.

  The system control unit 10 includes, as a hardware configuration, a general-purpose personal computer including a storage device and a central processing unit that performs processing according to a program stored in the storage device, and includes a sign projection unit 5 and a background projection unit 7. Operation control software for controlling the above is installed in the storage device. The system control unit 10 is installed on the loading platform of the vehicle T in the vicinity of the sign projection unit 5 and the background projection unit 7, and is electrically connected to the sign projection unit 5 and the background projection unit 7.

  In addition, the system control unit 10 includes a data storage unit 16 that stores the sign pattern sign data 14 and the background pattern background data 15 in association with a plurality of traffic signs, and stores data based on operator input as a functional configuration. A data extraction unit 21 that extracts the sign data 14 and the background data 15 from the part 16, and data that transmits the extracted sign data 14 to the sign projection unit 5 and transmits the extracted background data 15 to the background projection unit 7. A transmission unit 19 is included. Here, the sign data 14 and the background data 15 are data corresponding to signs obtained by inverting the traffic signs to be recognized when the light transmitted through the display board B is viewed from the front B2 side.

  With the above configuration, the sign data 14 and the background data 15 corresponding to the selected traffic sign are extracted from the data storage unit 16 based on the input of the operator who selects the traffic sign to be projected, and the sign projection unit 5 and the background respectively. It is transmitted to the projection unit 7. Then, a marker pattern laser based on the marker data 14 is emitted by the marker projection unit 5 toward the back surface B1 of the display board B, and the spot pattern light based on the background data 15 is adjusted. After being adjusted by the light unit 13, the background projection unit 7 irradiates the back surface B1 of the display plate B. Thereby, the traffic sign by the sign pattern and background pattern which permeate | transmitted the display board B can be visually recognized from the back of the vehicle T (from the front B2 side of the display board B).

  Therefore, according to the projection system 1b of the present embodiment, the signboard-type sign can be a sign having good visibility without the risk of deterioration over time. In addition, since the contents of the label can be easily changed by selecting the sign data 14 and the background data 15, information corresponding to sudden situations such as accidents and traffic restrictions due to weather is provided in real time. can do. In addition, since the present embodiment is a vehicle-mounted sign, for example, it moves to the accident occurrence site, and information according to the situation, such as “Accident closure here,” illustrated in FIG. Can be displayed.

  Next, a projection system 1c according to a third embodiment will be described with reference to FIG. In addition, about the structure similar to 1st embodiment and 2nd embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The projection system 1c includes an opaque display plate P, a sign projection unit 5 that projects a laser sign pattern on the front surface P1 of the display board P, and displays spotlight light. A background projection unit 7 that irradiates the front surface P1 of the plate P and projects a background pattern as a background of the sign pattern superimposed on the sign pattern; a system control unit that controls the sign projection unit 5 and the background projection unit 7; It has. The front surface P1 of the display plate P corresponds to the “projection surface” of the present invention.

  The point that the projection system 1c is different from the projection system 1b of the second embodiment is that the front surface P1 of the display plate P is irradiated with a marker pattern and a background pattern. Here, although the hardware configuration and the functional configuration of the projection system 1c can be substantially the same as those described above as the configuration of the projection system 1b, the marker data 14 and the background data 15 stored in the data storage unit 16 are used. Is data corresponding to a traffic sign to be recognized when the light projected on the front surface P1 of the display plate P is viewed from the front side. In the projection system 1c, the color of the spotlight is not particularly limited. For example, blue that is frequently used as a background of a general road sign that guides a destination or a background of a general road sign that guides a highway. It can be the green color that is often used. Note that a plurality of color spotlights may be provided, and a light control unit 13 that adjusts the irradiation output of the spotlights of the respective colors may be provided.

  The projection system 1c is an example in which the present invention is applied to a signboard type traffic sign. In order to project the sign pattern and the background pattern onto the front face P1 of the display plate P, the sign projection unit 5 and the background projection unit 7 are installed in front of the display plate P, and a laser and a spotlight are provided from below the display plate P. Can be irradiated (see FIG. 10A), or laser and spotlight can be irradiated from above the display plate P (see FIG. 10B). Alternatively, the mirror M that reflects the laser and spotlight is used, and the laser and the spotlight are irradiated from the sign projection unit 5 and the background projection unit 7 disposed below the display plate P, and reflected by the mirror M. (See FIG. 10 (c)), the laser beam and the spotlight are irradiated from the marker projection unit 5 and the background projection unit 7 disposed above the display plate P and reflected by the mirror M (FIG. 10 ( d)).

  The present invention has been described with reference to the examples of the projection systems 1, 1b, and 1c according to the preferred embodiments. However, the present invention is not limited to these embodiments, and the present invention is not limited to these embodiments. Various improvements and design changes can be made without departing from the scope of the invention.

  For example, in the projection system 1 according to the first embodiment, the one installed near the toll gate 2 on the toll road is shown, but the present invention is not limited to this. It may be used to assist signal signs. Furthermore, although the sign pattern (FIGS. 4A and 4B) indicating whether or not the vehicle can proceed is illustrated, the present invention is not limited to this, but the speed limit indication (see FIG. 5A), turning Various traffic signs such as a prohibited sign (see FIG. 5B) or a guide sign indicating a destination or a lane marking that divides a lane may be marked as the sign pattern 4.

  In the projection systems 1 and 1b of the first embodiment and the second embodiment, the red spotlight 11 and the green spotlight 12 are used to project the background pattern 6, but these colors are limited. However, any color can be used as long as the visibility of the marker pattern 4 can be improved. Furthermore, the irradiation output of the background pattern 6 by the background projection unit 7 may be controlled to 0% depending on the situation of the projection surface and the like. That is, if the projection surface is suitable for the irradiation of the laser L and good visibility can be obtained without projecting the background pattern 6, the irradiation output of the spotlight is 0%, or infinite It may be close to 0%.

  Furthermore, in the projection system 1 of the first embodiment, the one that controls the plurality of marker projection units 5 and the background projection unit 7 by using one projection control unit 8 is shown, but the present invention is not limited to this. The projection control unit 8 may be installed for each of the sign projection unit 5 and the background projection unit 7. In addition, although the sign pattern 4 and the background pattern 6 are projected on one side with respect to the charge gate 3, the present invention is not limited to this. The unit 5 and the background projection unit 7 may be installed and projected from the charge gate 3 in both directions.

  Moreover, in the projection system 1 of the first embodiment, the projection operation unit 9 is installed in the management building 22 away from the toll gate 2. However, the present invention is not limited to this. Projection operation unit 9 is installed in a facility such as a road management center that centrally manages the road, and is connected to a plurality of toll gates 2 through an Internet line or the like. You may manage collectively. As a result, for example, when a large-scale accident or disaster occurs, information can be switched simultaneously in various places and displayed on the road surface R.

  In addition, in the projection system 1b of the second embodiment, the case where the system control unit 10 is installed on the loading platform of the vehicle T is illustrated, but the present invention is not limited thereto, and for example, the system control unit 10 is installed inside the vehicle T. In addition, the sign projection unit 5 and the background projection unit 7 can be configured to perform wireless communication.

  In addition, the projection system 1b of the second embodiment and the projection system 1c of the third embodiment both arrange the projection control unit in the vicinity of the display plates B and P, and project to a position separated from the projection control unit. By providing an operation unit and communicating via a communication network, it is possible to remotely select and change traffic signs.

  Furthermore, in the projection system 1b of the second embodiment, the case where the signboard-type sign is a vehicle-mounted (movable) is exemplified, but the present invention is not limited to this, and as shown in FIG. The projection system of the present invention can be applied to a signboard-type sign to be used. This is because the display board B having translucency is used as a signboard, the sign projection unit 5, the background projection unit 7 and the system control unit 10 are arranged in the space behind the display board B, and the back surface of the display board B The sign pattern 4 and the background pattern 6 are projected onto B1.

  In addition, unlike the above-described embodiment, the projection surface can be a wall surface of a building or a structure. For example, as illustrated in FIGS. 11A and 11B, the sign projection unit 5 and the background projection unit 7 are arranged on the overpass that crosses the road, and the sign pattern 4 and the background pattern 6 are projected onto the wall surface W of the overpass. be able to.

1,1b, 1c Projection system (traffic sign projection system)
DESCRIPTION OF SYMBOLS 4 Marking pattern 5 Marking projection part 6 Background pattern 7 Background projection part 8 Projection control part 9 Projection operation part 10 System control part 11 Red spotlight (spotlight)
12 Green spotlight (spotlight)
DESCRIPTION OF SYMBOLS 13 Light control unit 14 Marking data 15 Background data 16 Data storage part 17 Operation side communication part 18 Control side communication part 19 Data transmission part L Laser N Wireless communication network (communication network)
R Road surface (projection surface)
B1 Rear surface (projection surface) of display plate B
P1 Front of display plate P (projection surface)
W Wall surface (projection surface)

Claims (5)

A sign projection unit that projects a sign pattern of a traffic sign on a projection surface by irradiating a laser;
A background projection unit that irradiates the light of a spotlight and projects a background pattern that is the background of the sign pattern onto the projection plane in an overlapping manner with the sign pattern;
A data storage unit that stores sign data of the sign pattern and background data of the background pattern in association with a plurality of traffic signs, and transmits the sign data to the sign projection unit and transmits the background data to the background projection unit And a system control unit having a data transmission unit for transmitting to the traffic sign projection system. The spotlight is
A red spotlight that can emit red light,
With a green spotlight that can emit green light,
The background projection unit
The light control unit according to claim 1, further comprising: a light control unit that receives the background data transmitted from the data transmission unit and adjusts irradiation output of the red spotlight and the green spotlight based on the received background data. The traffic sign projection system according to 1. The system controller is
A projection control unit electrically connected to the sign projection unit and the background projection unit;
A projection operation unit installed at a position separated from the projection control unit,
The projection operation unit
The data storage unit;
An operation side communication unit that transmits the marker data and the background data stored in the data storage unit to the projection control unit via a communication network;
The projection control unit
A control-side communication unit that receives the transmitted marker data and the background data;
The traffic sign projection according to claim 1, further comprising: the data transmission unit that transmits the received sign data to the sign projection unit and transmits the background data to the background projection unit. system. The projection surface is a road surface;
The traffic sign projection system according to any one of claims 1 to 3, wherein the sign pattern and the background pattern indicate whether or not a vehicle can enter a toll gate. Further comprising a display plate having translucency,
The said marker | projector projection part and the said background projection part irradiate the light of the said laser and the said spotlight respectively to the back surface of the said board | plate material for display as said projection surface. The traffic sign projection system according to any one of the above.

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