Traffic security projection device

Abstract

To provide a traffic security projection device which radiates light to a plurality of radiated bodes for traffic security installed on a traffic path with one projection part.SOLUTION: A traffic security projection device 1 is provided with a plurality of radiated bodies 2a, 2b, 2c, which are aligned according to a travel direction of a vehicle C on a road R, set as projection objects. The traffic security projection device 1 includes: one projection part 11 having a light source 15 and configured to radiate light to the radiated bodies 2a, 2b, 2c; and a control unit 12 configured to control the one projection part 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a traffic safety projection device that illuminates a safety object installed on a traffic route. [Background technology]

[0002] A traffic sign projection system is known from the past, for example, as described in Patent Document 1. Patent Document 1 discloses that a display board fixed to an installation surface such as a road is used as a signboard, a sign projection unit, a background projection unit, and a system control unit are arranged in the space behind the display board, and a sign pattern and a background pattern are projected onto the back of the display board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6042839 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-mentioned conventional traffic sign projection system, if it is desired to install signs in multiple locations, it is necessary to install a projection device on each sign, which poses the problem of requiring a lot of time and effort for maintenance and other work, as well as being extremely costly.

[0005] Therefore, the present invention has been made in consideration of the above problems, and aims to provide a traffic safety projection device that uses a single projection unit to irradiate light onto multiple safety illuminated objects installed on traffic routes. [Means for solving the problem]

[0006] The present invention is a traffic safety projection device 1 that is provided as a projection target for a plurality of safety illuminated objects 2a, 2b, 2c that are arranged on a traffic route R according to the direction of travel of a passing object C, and is characterized by having a light source 15, one projection unit 11 that illuminates the plurality of safety illuminated objects 2a, 2b, 2c with light, and a control unit 12 that controls the one projection unit 11. [Effects of the Invention]

[0007] According to the present invention, it is possible to irradiate a plurality of safety irradiation objects installed on traffic routes at low cost while improving the efficiency of maintenance and other operations. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing a system configuration when a traffic safety projection device according to a first embodiment of the present invention is used. [Figure 2] 1 is a functional block diagram showing the configuration of a traffic safety projection device according to a first embodiment of the present invention. [Figure 3] 3 is a diagram showing an example of image information when an image of an illuminated object is captured by a camera in the traffic safety projection device according to the first embodiment of the present invention. FIG. [Figure 4] 1 is a diagram showing an illumination mode when a plurality of illumination targets are irradiated simultaneously in a batch in the traffic safety projection device according to the first embodiment of the present invention. FIG. [Figure 5] 1 is a diagram showing an illumination mode when a plurality of illumination targets are illuminated sequentially in the traffic safety projection device according to the first embodiment of the present invention; [Figure 6] 1A to 1C are diagrams showing examples of adjustment methods when the adjustment unit in the traffic safety projection device according to the first embodiment of the present invention uses (A) a display element, (B) a light-transmitting member, and (C) another light-transmitting member. [Figure 7] 4 is a flowchart showing the operation of the traffic safety projection device according to the first embodiment of the present invention. [Figure 8] 1 is a diagram showing a configuration of a traffic safety projection device according to a first embodiment of the present invention, in which a projection unit is provided at the position of an object to be illuminated on the most upstream side. [Figure 9] 10 is a diagram showing the state of an illuminated object before projection by a projection unit in a traffic safety projection device according to a second embodiment of the present invention. FIG. [Figure 10] 10A and 10B are diagrams showing a state in which a projection unit of a traffic safety projection device according to a second embodiment of the present invention projects and displays (A) a graphic image and (B) a graphic and character image. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment of the present invention) The traffic safety projection device according to this embodiment will be described with reference to FIGS. 1 to 8. FIG. 1 is a schematic diagram showing a system configuration when the traffic safety projection device according to this embodiment is used. In FIG. 1, a vehicle C, which is a vehicular object, travels on a road R, which is a traffic route, and multiple illuminated objects 2a, 2b, and 2c (illuminated objects for safety) are provided in the vehicle's direction of travel. A traffic safety projection device 1 targets the illuminated objects 2a, 2b, and 2c, and a single traffic safety projection device 1 illuminates the multiple illuminated objects 2a, 2b, and 2c with light. The illuminated objects 2a, 2b, and 2c are markings (arrow signs in FIG. 1) bearing a common first image (an arrow design in FIG. 1) for safety purposes (first predetermined image, first desired image, first guide image) as shown in FIG. 1, and have a function of prompting a driver D (not shown) of vehicle C to change lanes to an adjacent lane, i.e., the lane immediately to the right in the direction of travel of vehicle C in FIG. 1. The traffic safety projection device 1 illuminates the illuminated objects 2a, 2b, and 2c with light (for example, monochromatic illumination light), thereby enabling the driver D to clearly recognize the arrow design, which is the marking on the illuminated objects 2a, 2b, and 2c, even at night when the light from the headlights of the vehicle C cannot reach sufficiently, thereby ensuring safety.

[0010] The number of the irradiation targets 2a, 2b, and 2c to be installed is not limited to three and is arbitrary, and at least two or more targets are installed.

[0011] 2 is a functional block diagram showing the configuration of a traffic safety projection device 1 according to this embodiment. The traffic safety projection device 1 includes a projection unit 11 that irradiates light onto illuminated objects 2a, 2b, and 2c, a control unit 12 that controls the projection unit 11, a camera 13 that captures images in the direction of the illuminated objects 2a, 2b, and 2c, and an entry detection sensor 14 (detection unit) that detects that a vehicle C has entered a predetermined area on a road R. The projection unit 11 also includes a light source 15 (e.g., an LED or laser) that serves as an emission source of the light to be irradiated onto the illuminated objects 2a, 2b, and 2c, and an irradiation unit 16 that includes optical components and the like and converts the light from the light source 15 into emitted light under the control of the control unit 12 and irradiates the light. Furthermore, the control unit 12 includes a detection unit 17 that detects the irradiated objects 2a, 2b, and 2c from the image information captured by the camera 13 and detects that there is a vehicle C approaching the irradiated objects 2a, 2b, and 2c from the detection information of the intrusion detection sensor 14, and an adjustment unit 18 that adjusts the projection unit 11 so that the emitted light irradiated from the projection unit 11 to the irradiated objects 2a, 2b, and 2c is in an appropriate form.

[0012] Each component will be described below. Fig. 3 is a diagram showing an example of image information obtained when the camera 13 captures images of the illuminated objects 2a, 2b, and 2c in the traffic safety projection device 1 according to this embodiment. The camera 13 captures images of the illuminated objects 2a, 2b, and 2c in a predetermined direction, either constantly, periodically, or irregularly. The detection unit 17 of the control unit 12 performs image analysis processing on the captured image information to detect the illuminated objects 2a, 2b, and 2c. In Fig. 3, the state in which the illuminated objects 2a, 2b, and 2c have been detected is indicated by thick dashed dotted lines. The positions and distances of the detected illuminated objects 2a, 2b, and 2c are then calculated.

[0013] The camera 13 may be, for example, a stereo camera or a combination of a monocular camera and a TOF camera, so that the detection unit 17 can calculate the distance to the irradiated objects 2a, 2b, and 2c, or the distance to the irradiated objects 2a, 2b, and 2c may be calculated using a program that calculates the distance from image information from the monocular camera.

[0014] If the detection unit 17 cannot detect any one of the irradiated objects 2a, 2b, 2c in the image information captured by the camera 13, it determines that there is a problem with the installation of the traffic safety projection device 1 or that the orientation of the projection unit 11 of the traffic safety projection device 1 has shifted due to an external factor such as contact or vibration, and issues an alert to the administrator and stops emitting light.

[0015] The intrusion detection sensor 14 is a sensor capable of detecting a vehicle C, such as an infrared sensor, distance sensor, or image sensor, and detects a vehicle C traveling toward the illuminated objects 2a, 2b, and 2c on the lane on which the illuminated objects 2a, 2b, and 2c are installed and within a predetermined distance from the illuminated objects 2a, 2b, and 2c. The detection unit 17 detects the presence or absence of a vehicle C approaching the illuminated objects 2a, 2b, and 2c from the measurement results of the intrusion detection sensor 14. In response to this detection, the control unit 12 controls the projection unit 11 to start irradiating the illuminated objects 2a, 2b, and 2c.

[0016] The intrusion detection sensor 14 may be provided as needed, and if the intrusion detection sensor 14 is not provided, the projection unit 11 may be controlled so that the irradiated objects 2a, 2b, and 2c are always irradiated, for example, during a preset nighttime period or while the illuminance of an illuminance sensor installed at any location on the road R is below a predetermined value.

[0017] The light irradiated onto the irradiated objects 2a, 2b, and 2c is adjusted by an adjustment unit 18. Fig. 4 is a diagram showing an irradiation mode when the traffic safety projection device 1 according to this embodiment irradiates a plurality of irradiated objects 2a, 2b, and 2c simultaneously, and Fig. 5 is a diagram showing an irradiation mode when the traffic safety projection device 1 according to this embodiment irradiates a plurality of irradiated objects 2a, 2b, and 2c sequentially. In Figs. 4 and 5, the state in which light is irradiated from the traffic safety projection device 1 is indicated by diagonal lines.

[0018] 4, the adjustment unit 18 controls the projection unit 11 by a method as shown in Fig. 6, which will be described later, to brightly illuminate all of the illuminated objects 2a, 2b, and 2c at the same time. At this time, the light may be irradiated in a steady state without changing the intensity or wavelength of the light, or the intensity or wavelength of the light may be changed periodically or irregularly, or the light source 15 may be switched on and off to make the illuminated objects 2a, 2b, and 2c flash and become more conspicuous.

[0019] 5, the adjustment unit 18 controls the projection unit 11 by a method as shown in FIG. 6, which will be described later, to irradiate the illuminated objects 2a, 2b, and 2c with light in a predetermined order (in FIG. 5, the order is from the upstream side to the downstream side in the traveling direction of the vehicle C). That is, the illuminated illuminated objects 2a, 2b, and 2c change dynamically, so that illumination is performed like an animation. At this time, the wavelength of the light irradiated to each of the illuminated objects 2a, 2b, and 2c may be changed to make each of the illuminated objects 2a, 2b, and 2c more noticeable.

[0020] Fig. 6 is a diagram showing an example of an adjustment method for the adjustment unit 18 in the traffic safety projection device 1 according to this embodiment. Fig. 6(A) shows an example in which a display element is used, and Fig. 6(B) and Fig. 6(C) show examples in which a light-transmitting member is used.

[0021] 6(A), the adjustment unit 18 controls the content of the display image on the display element 20 provided in the irradiation unit 16 to irradiate the desired light as shown in FIGS. 4 and 5. Specifically, in the case of FIG. 4, the detection unit 17 calculates the positions and distances of the irradiated objects 2a, 2b, and 2c by image analysis processing, and based on the calculation results, the adjustment unit 18 generates one image data in which light is irradiated simultaneously and in a pinpoint manner only onto each of the irradiated objects 2a, 2b, and 2c, and displays the image data on the display element 20. When light from the light source 15 passes through the display element 20, the light is irradiated simultaneously onto the irradiated objects 2a, 2b, and 2c as shown in FIG.

[0022] 5, the adjustment unit 18 generates three pieces of image data for each of the irradiated objects 2a, 2b, and 2c, based on the positions and distances of the irradiated objects 2a, 2b, and 2c detected by the detection unit 17, in which light is irradiated only to one of the irradiated objects 2a, 2b, and 2c, and switches and displays the images on the display element 20 in a predetermined order. The light from the light source 15 passes through the display element 20 in accordance with the switching of the image data, thereby producing a dynamically changing animation illumination as shown in FIG.

[0023] Furthermore, in the case of Fig. 5, it is also possible to irradiate dynamically changing animations using a light-transmitting member 21 as shown in Fig. 6(B) and Fig. 6(C). The light-transmitting member 21 shown in Fig. 6(B) and Fig. 6(C) is installed so as to be physically rotatable in the direction shown by the arrow by a driving mechanism such as a motor, and is provided with a plurality of light-transmitting portions 21a to 21f. Each of light-transmitting portions 21a-21f is associated with one of irradiated bodies 2a, 2b, and 2c (for example, light-transmitting portion 21a and light-transmitting portion 21d are associated with irradiated body 2a, light-transmitting portion 21b and light-transmitting portion 21e are associated with irradiated body 2b, and light-transmitting portion 21c and light-transmitting portion 21f are associated with irradiated body 2c). When irradiating body 2a, the motor is controlled to rotate at an angle such that light from light source 15 passes through light-transmitting portion 21a or light-transmitting portion 21d. When irradiating body 2b, the motor is controlled to rotate at an angle such that light from light source 15 passes through light-transmitting portion 21b or light-transmitting portion 21e. When irradiating body 2c, the motor is controlled to rotate at an angle such that light from light source 15 passes through light-transmitting portion 21c or light-transmitting portion 21f. This control enables the illumination of dynamically changing animations as shown in FIG. 5.

[0024] In addition to the method shown in FIG. 6, a method using a diffractive optical element or a method using a CGH (Computer-Generated Hologram) may also be used.

[0025] Next, the operation of the traffic safety projection device 1 according to this embodiment will be described. FIG. 7 is a flowchart showing the operation of the traffic safety projection device 1 according to this embodiment. First, the detection unit 17 acquires image information captured by the camera 13 (S1). The image information is subjected to image analysis processing to detect the irradiated objects 2a, 2b, and 2c (S2). If even one of the irradiated objects 2a, 2b, and 2c is not detected, or if a predetermined number or more of the irradiated objects are not detected, an alert is output, for example, to an administrator (S3), and the process ends. When an alert is output, the administrator actually checks the condition of the traffic safety projection device 1 and performs maintenance to keep it in an appropriate condition.

[0026] If the illuminated objects 2a, 2b, and 2c are detected in S2, the detection unit 17 calculates the positions and distances of the illuminated objects 2a, 2b, and 2c (S4). The detection unit 17 acquires sensor information from the entry detection sensor 14 (S5) and determines whether the vehicle C has entered a predetermined area on the road R (S6). If the vehicle C has not entered, the light source 15 is turned off (S7) and the process returns to S5. If the vehicle C has entered, the light source 15 is turned on (S8), and the adjustment unit 18 adjusts the light emitted from the illumination unit 16 based on the positions and distances of the illuminated objects 2a, 2b, and 2c (S9). The illumination unit 16 illuminates the illuminated objects 2a, 2b, and 2c with light (S10), and the process returns to S1, where the above processing is repeated.

[0027] In the above process, the projection unit 11 may be provided integrally with the illuminated object 2a located at the most upstream side along the illumination direction of the illumination unit 16. FIG. 8 is a diagram showing a configuration in which the projection unit 11 is provided at the position of the illuminated object at the most upstream side in the traffic safety projection device 1 according to this embodiment. As shown in FIG. 8, the traffic safety projection device 1 may be provided integrally with the position of the illuminated object 2a, and the illuminated object 2a may be illuminated by leaked light from the projection unit 11. This reduces the effort required to set up the illuminated object 2a and simplifies on-site work.

[0028] Furthermore, in the above, the irradiated objects 2a, 2b, and 2c are described as arrow boards with arrow designs written on them, but they may also be objects with other figures, letters, and images consisting of figures and letters written on them.

[0029] Furthermore, the traffic route may include a sidewalk in addition to the road R, and the passing objects may include people. Furthermore, the irradiated objects 2a, 2b, and 2c may be other traffic safety items such as triangular cones in addition to the flat signboards shown above.

[0030] Furthermore, although the above description has been given of a case in which a common safety arrow design is displayed on the irradiated objects 2a, 2b, and 2c, the images displayed on the irradiated objects 2a, 2b, and 2c may be images that form a single desired image (first desired image) when visually combined. For example, the images may be images in which adjacent irradiated objects 2a and 2b form a single large arrow, or adjacent irradiated objects 2b and 2c form a single large arrow, or three irradiated objects 2a, 2b, and 2c form a single large arrow. In addition to arrow images, at least two of the irradiated objects 2a, 2b, and 2c may be combined to form a single meaningful large image (including figures and characters).

[0031] In this way, the traffic safety projection device 1 of this embodiment is a traffic safety projection device 1 that is set up to project onto a plurality of illuminated objects 2a, 2b, 2c that are arranged on a road R according to the traveling direction of a vehicle C, and is equipped with a light source 15, one projection unit 11 that irradiates the plurality of illuminated objects 2a, 2b, 2c with light, and a control unit 12 that controls the one projection unit 11. Therefore, there is no need to provide a light emitting unit such as a light source 15 for each of the illuminated objects 2a, 2b, 2c, thereby reducing costs, and since the light is not irradiated onto anything other than the illuminated objects 2a, 2b, 2c, which are the targets, it is possible to prevent light from entering the eyes of surrounding drivers, pedestrians, construction site workers, etc., threatening safety or causing discomfort.

[0032] Furthermore, as necessary, the control unit 12 controls the projection unit 11 to irradiate light onto the plurality of illuminated objects 2a, 2b, and 2c all at once, so that by brightly illuminating all of the plurality of illuminated objects 2a, 2b, and 2c all at once, the illuminated objects 2a, 2b, and 2c can be made conspicuous even from a distance where the light of the headlights of the vehicle C cannot reach. Also, for example, by repeatedly brightening and darkening the illuminated objects 2a, 2b, and 2c, the illuminated objects 2a, 2b, and 2c can be made more conspicuous and recognized by the driver D.

[0033] Furthermore, if necessary, the control unit 12 controls one projection unit 11 to sequentially irradiate light onto each of the multiple irradiated objects 2a, 2b, and 2c in a predetermined order, thereby providing a highly expressive animation effect and allowing users to intuitively recognize the content of the regulations and the next action to be taken.

[0034] Furthermore, if necessary, the device further includes an entry detection sensor 14 that detects when the vehicle C enters a specified area of ​​the road R, and the control unit 12 controls the projection unit 11 to start irradiating the multiple irradiated objects 2a, 2b, and 2c when the entry detection sensor 14 detects that the vehicle C has entered the specified area, so that irradiation can be reliably started when the vehicle C comes close to the irradiated objects 2a, 2b, and 2c to a certain extent.

[0035] Furthermore, if necessary, the illuminated objects 2a, 2b, and 2c can be arrow boards with safety arrows written on them, and one projection unit 11 can illuminate the arrows written on the multiple arrow boards by irradiating them with monochromatic illumination light, thereby simply irradiating them with monochromatic light, thereby simplifying the structure and control of the projection unit 11.

[0036] Furthermore, if necessary, one projection unit 11 is provided on the most upstream arrow board among the multiple arrow boards in the direction of illumination light irradiation, and since this most upstream arrow board is illuminated by the leaked light from one projection unit 11, there is no need to provide a new projection unit 11 at a location other than the installation locations of the multiple arrow boards, and there is no need to secure separate installation space for the projection unit 11, thereby reducing the workload of the workers performing the installation work.

[0037] Furthermore, if necessary, the images written on each of the marks of the multiple irradiated bodies 2a, 2b, and 2c are common images (arrow images), so the visual effect can be improved by arranging multiple identical images side by side.

[0038] Furthermore, if necessary, the images written on each of the markings on the irradiated bodies 2a, 2b, and 2c are images that, when viewed visually combined, form a single desired image, so even an image with a large design can be visually represented as a single image by dividing it into multiple parts and displaying them side by side.

[0039] Furthermore, the images displayed on the irradiated objects 2a, 2b, and 2c as needed are either figures, letters, or images of figures and letters, so that intuitively understandable figures or messages expressing the matters to be communicated can be displayed.

[0040] Furthermore, if necessary, the image displayed on the illuminated bodies 2a, 2b, and 2c is a first guidance image that guides vehicle C, as a pedestrian traveling in one lane of the road, to another lane adjacent to that one lane. Therefore, for example, when lane restrictions are in place due to construction work, the vehicle can intuitively recognize the lane restrictions, preventing accidents such as driving into a construction site due to delayed recognition or collisions due to abrupt merging just before a lane narrowing section.

[0041] (Second embodiment of the present invention) The traffic safety projection device according to this embodiment will be described with reference to Figures 9 and 10. In the traffic safety projection device 1 according to this embodiment, the projection unit 11 irradiates a plurality of unmarked safety illuminated objects with image light representing a second safety image (a second predetermined image), and displays the second image on the surface of the safety illuminated objects. Note that in this embodiment, descriptions that overlap with those of the first embodiment will be omitted.

[0042] 9 is a diagram showing the state of the illuminated objects 2a, 2b, and 2c before projection by the projection unit 11 in the traffic safety projection device 1 according to this embodiment. Unlike the first embodiment, the illuminated objects 2a, 2b, and 2c have no markings on their surfaces. The projection unit 11 projects and displays any second image on the surfaces of the illuminated objects 2a, 2b, and 2c under the control of the control unit 12.

[0043] FIG. 10 is a diagram showing a state where the projection unit 11 projects and displays in the traffic safety projection device 1 according to this embodiment. FIG. 10(A) shows an example of a case where a figure is projected and displayed, and FIG. 10(B) shows an example of a case where a figure and text are projected and displayed. FIG. 10(A) shows a state where a single large arrow image (second predetermined image, second desired image, second guide image) is displayed on the illuminated objects 2a, 2b, and 2c, while FIG. 10(B) shows a state where the text "Right" and a small arrow image (second predetermined image, second desired image, second guide image) are displayed on the illuminated objects 2a, 2b, and 2c. In either case, the illuminated objects 2a, 2b, and 2c are regarded as one large screen, and images of figures and / or text are displayed across each of the illuminated objects 2a, 2b, and 2c.

[0044] 10, the second images displayed on the irradiated objects 2a, 2b, and 2c may be displayed simultaneously for the irradiated objects 2a, 2b, and 2c, or may be displayed by switching sequentially like an animation in the order of, for example, the irradiated object 2a, the irradiated object 2b, and the irradiated object 2c. In particular, when characters such as those shown in FIG. 10(B) are included, the displayed content can be easily recognized by switching the display in the reading order, such as "right" and "to."

[0045] Furthermore, since the display mode of the second image can be freely changed by the control unit 12, for example, the display of Fig. 10(A) and the display of Fig. 10(B) may be switched periodically at predetermined intervals. In particular, by switching between a combination of text display and graphic display, it becomes possible to intuitively recognize the displayed content.

[0046] Furthermore, in the example of Figure 10, the second images displayed on each of the multiple irradiated objects 2a, 2b, and 2c are images that, when viewed visually combined, form a single large arrow pattern or a pattern of the words "Right" and a small arrow (second desired image), but as in the case of Figure 4 in the first embodiment, a common image (for example, all the same small arrow pattern) may be displayed on the multiple irradiated objects 2a, 2b, and 2c.

[0047] Furthermore, as shown in Figure 10, the second image may be a guidance image (second guidance image) that guides a vehicle C traveling in one lane of a road R, which is a traffic route, to another lane adjacent to the one lane, or it may be a guidance image that alerts pedestrians walking on the sidewalk.

[0048] As described above, in the traffic safety projection device 1 according to this embodiment, the irradiated objects 2a, 2b, and 2c are unmarked objects, and one projection unit 11 irradiates the plurality of irradiated objects 2a, 2b, and 2c with image light representing a second image for safety purposes, thereby displaying the second image on the surface of the irradiated objects 2a, 2b, and 2c, which are unmarked objects. Therefore, the color and shape of the displayed image can be easily changed according to the control of the control unit 12.

[0049] Furthermore, if necessary, the second images displayed on the plurality of irradiation targets 2a, 2b, and 2c can be made to be common to each other, thereby arranging the same images in multiple places, thereby improving the visual effect.

[0050] Furthermore, if necessary, the second images displayed on each of the multiple irradiated bodies 2a, 2b, and 2c are images that form a single desired image when the multiple second images are visually combined and viewed, so even an image with a large design can be visually represented as a single image by dividing it into multiple parts and displaying them side by side, thereby improving visibility from a long distance.

[0051] Furthermore, if necessary, the second image can be an image of either a figure, a letter, or a combination of a figure and a letter, so that an intuitively easy-to-understand figure or a message expressing the message can be displayed, and in particular, by switching between displaying figures and letters, it becomes possible to understand the content of the regulation more intuitively.

[0052] Furthermore, if necessary, the second image is a guidance image that guides a vehicle C, as a pedestrian traveling in one lane of a road R, as a traffic route, to another lane adjacent to that one lane. Therefore, for example, when a lane restriction is imposed due to construction work, the vehicle can intuitively recognize the lane restriction, and it is possible to prevent accidents such as driving into a construction site due to delayed recognition or collisions due to abrupt merging just before a lane narrowing section. [Explanation of symbols]

[0053] C vehicle D. Driver R road 1 Traffic safety projection device 2a,2b,2c Irradiated object 11 Projection section 12 Control Unit 13 Camera 14. Intrusion detection sensor 15 light source 16 Irradiation unit 17 Detector 18 Adjustment part 20 Display element 21 Translucent member 21a~21f Transparent section

Claims

1. A traffic safety projection device is provided as a projection target for a plurality of safety illuminated objects arranged in accordance with the traveling direction of a vehicle on a traffic route, a projection unit including a light source and configured to project light onto the plurality of safety illumination targets; a control unit that controls the one projection unit; A traffic safety projection device characterized by:

2. The control unit The one projection unit is controlled so as to collectively irradiate the plurality of safety illumination objects with the light.

2. The traffic safety projection device according to claim 1.

3. The control unit The one projection unit is controlled so as to sequentially irradiate the light onto each of the plurality of safety illumination targets in accordance with a predetermined order.

2. The traffic safety projection device according to claim 1.

4. The vehicle further includes a detection unit that detects that the vehicle has entered a predetermined area of ​​the traffic route, The control unit When the detection unit detects that the passing object has entered the predetermined area, the control unit controls the control unit to start the irradiation of the plurality of safety-purpose irradiation objects.

4. The traffic safety projection device according to claim 3.

5. The plurality of safety irradiation objects are a marking on which a first predetermined image for security purposes is written, The one projection unit is By irradiating the plurality of the indicia with monochromatic illumination light, the first predetermined image, which is the indicia content of the plurality of the indicia, is illuminated.

5. The traffic safety projection device according to claim 2, wherein the projection device is a projection device for traffic safety.

6. The one projection unit is Among the plurality of markings, the marking is provided on the marking located most upstream in the irradiation direction of the illumination light, The indicia on the most upstream side is illuminated by the leakage light of the one projection unit.

6. The traffic safety projection device according to claim 5.

7. The first predetermined image depicted on each of the plurality of depictions is a common image.

6. The traffic safety projection device according to claim 5.

8. The first predetermined images depicted on the plurality of depictions are images that constitute one first desired image when the plurality of first predetermined images are visually combined and viewed.

6. The traffic safety projection device according to claim 5.

9. The first predetermined image is Images of graphics, text, or graphics and text 6. The traffic safety projection device according to claim 5.

10. The first predetermined image is a first guide image for guiding a vehicle, as the vehicular object, traveling in one lane of a roadway, as the traffic path, to another lane adjacent to the one lane; 6. The traffic safety projection device according to claim 5.

11. The plurality of safety irradiation objects are unmarked objects, The one projection unit is By irradiating the plurality of unindicated objects with image light representing a second predetermined image for security purposes, the second predetermined image is displayed on the surfaces of the plurality of unindicated objects.

5. The traffic safety projection device according to claim 2, wherein the projection device is a projection device for traffic safety.

12. The second predetermined image to be displayed on each of the plurality of unindicated objects is a common image.

12. The traffic safety projection device according to claim 11.

13. The second predetermined image displayed on each of the plurality of unindicated objects is an image that constitutes one second desired image when the plurality of second predetermined images are visually combined and viewed.

12. The traffic safety projection device according to claim 11.

14. The second predetermined image is Images of graphics, text, or graphics and text 12. The traffic safety projection device according to claim 11.

15. The second predetermined image is a second guide image for guiding a vehicle, as the vehicular object, traveling in one lane of a roadway, as the traffic path, to another lane adjacent to the one lane; 12. The traffic safety projection device according to claim 11.

Images