Road surface projection device

Abstract

To provide a road surface projection device allowing a driver of a vehicle to easily notice the presence of a pedestrian crossing and to surely recognize the presence of a crossing pedestrian.SOLUTION: A road surface projection device 1 provided on a road surface R on which a pedestrian crossing PC is provided as a projection target includes a projection unit 2 that performs desired projection display on the road surface R, a pedestrian detection unit 3 that detects a pedestrian X in a crossing state or a crossing preparation state of the pedestrian crossing PC, and a control unit 4. When the pedestrian detection section 3 detects the pedestrian X, the control section 4 executes the crossing projection processing of causing the projection section 2 to project, onto the road surface R, the crossing notification display Sy for notifying the driver DR of the vehicle C of the crossing by the pedestrian X at the predetermined portion Z adjacent to at least one of the first side in the width direction W and the second side in the width direction W of the pedestrian crossing PC.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a road surface projection device that projects and displays images onto a road surface on which a pedestrian crossing is provided. [Background technology]

[0002] A known road surface projection device is described in, for example, Patent Document 1. Patent Document 1 discloses that this road surface projection device irradiates a laser beam onto a road surface to project information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3689741 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the above-mentioned conventional road surface projection device can make a crosswalk stand out by using laser light, the crosswalk is so conspicuous that it is difficult for pedestrians to notice its existence when they are walking.

[0005] Therefore, the present invention has been made in consideration of the above problems, and aims to provide a road surface projection device that makes it easier for vehicle drivers to notice the presence of a crosswalk and that enables them to reliably recognize the presence of pedestrians crossing the road. [Means for solving the problem]

[0006] The present invention provides a road surface projection device 1 that is provided with a road surface R on which a crosswalk PC is provided as a projection target, and includes a projection unit 2 that performs a desired projection display onto the road surface R, a pedestrian detection unit 3 that detects a pedestrian X who is in a state of crossing the crosswalk PC or preparing to cross, and a control unit 4, wherein when the pedestrian detection unit 3 detects the pedestrian X, the control unit 4 executes a crossing projection process that causes the projection unit 2 to project a crossing warning display Sy onto the road surface R at a predetermined location Z adjacent to at least one of a first width side or a second width side of the crosswalk to notify a driver DR of a vehicle C that the pedestrian X is crossing. [Effects of the Invention]

[0007] According to the present invention, it is possible to reliably make a driver of a vehicle aware of the existence of a pedestrian crossing, and also to reliably make the driver aware of the presence of a pedestrian crossing the pedestrian crossing. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of an illumination state of a road surface projection device according to an embodiment of the present invention, viewed from the side; [Figure 2] 1 is a schematic diagram of an illumination state of a road surface projection device according to an embodiment of the present invention, viewed from above; [Figure 3] 1 is a functional block diagram showing the configuration of a road surface projection device according to an embodiment of the present invention; [Figure 4] FIG. 1 is a schematic diagram illustrating a case where a camera is used as a pedestrian detection unit in a road surface projection device according to an embodiment of the present invention. [Figure 5] 10A and 10B are diagrams showing an example of a case where a road surface projection device according to an embodiment of the present invention projects and displays a crossing warning display in animation representation. [Figure 6] 10A and 10B are diagrams showing a specific example of a display mode when a crossing warning display is projected and displayed to a driver of a vehicle turning right at an intersection in a road surface projection device according to an embodiment of the present invention. [Figure 7]10A and 10B are diagrams showing a specific example of a display mode when a crossing warning display is projected and displayed to a driver of a vehicle turning left at an intersection in a road surface projection device according to an embodiment of the present invention. [Figure 8] 10A and 10B are diagrams showing a specific example of a display mode when a crossing warning display is projected and displayed to a driver of a vehicle traveling straight through an intersection in a road surface projection device according to an embodiment of the present invention; [Figure 9] 4 is a flowchart showing the operation of the road surface projection device according to the embodiment of the present invention. [Figure 10] 10A and 10B are diagrams showing specific examples of display modes when a crossing warning display is projected and displayed on the side opposite to the side from which a vehicle is approaching a crosswalk in a road surface projection device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A road surface projection device according to one embodiment of the present invention will be described with reference to Figures 1 to 10. The road surface projection device according to this embodiment projects onto a road surface on which a crosswalk is provided, such as a road surface on which a crosswalk is provided at an intersection or a T-junction.

[0010] Fig. 1 is a schematic diagram of the illumination state of the road surface projection device 1 according to this embodiment when viewed from the side, and Fig. 2 is a schematic diagram of the illumination state of the road surface projection device 1 according to this embodiment when viewed from above. In the example shown in Fig. 1 and Fig. 2, the road surface projection device 1 projects and displays a crossing warning display Sy that warns the driver DR of the vehicle C that a pedestrian X is crossing the road, at an adjacent predetermined site Z1 on a first side in the width direction W of the crosswalk PC1 (the back side of the crosswalk PC1 on the near side in the paper plane in the case of Fig. 1, and the left side of the crosswalk PC1 on the right side in the paper plane in the case of Fig. 2: the center side of the intersection). Furthermore, as will be described in detail later, a crossing warning display Sy is projected and displayed at an adjacent predetermined location Z2 on the second side in the width direction W of the crosswalk PC1 (on the near side of the paper in the case of FIG. 1, on the left side of the crosswalk PC1 on the near side of the paper, and on the lower right side of the crosswalk PC1 on the right side of the paper in the case of FIG. 2: opposite the center of the intersection) to notify the driver DR (not shown in FIGS. 1 and 2) of the vehicle C (not shown in FIGS. 1 and 2) entering the intersection that pedestrian X is crossing. The specific control of the display mode of the crossing warning display Sy will be described in detail later.

[0011] In addition, in Figures 1 and 2, the crossing warning display Sy is projected and displayed at both the predetermined portion Z1 and the predetermined portion Z2, but it is sufficient that the crossing warning display Sy is projected and displayed at at least one of the predetermined portions Z.

[0012] In addition, in Figures 1 and 2, the road surface projection device 1 that projects and displays at a specified location Z1 and the road surface projection device 1 that projects and displays at a specified location Z2 are shown as separate entities, but it is also possible to use a single road surface projection device 1 to project and display at both the specified location Z1 and the specified location Z2.

[0013] 1 and 2 show only one example of the configuration and projected display for the crosswalk PC1, but a road surface projection device 1 or the like may be installed at each of the other crosswalks PC2, PC3, and PC4 so that similar configurations and projected displays are also achieved for the other crosswalks PC2, PC3, and PC4. In the following embodiment, a projected display for the crosswalk PC1 shown in FIGS. 1 and 2 will be described.

[0014] 3 is a functional block diagram showing the configuration of a road surface projection device 1 according to this embodiment. The road surface projection device 1 includes a projection unit 2 that projects and displays a crossing warning display Sy onto a road surface R as a projection target, a pedestrian detection unit 3 that detects a pedestrian X who is crossing or preparing to cross a crosswalk PC1, and a control unit 4 that executes at least a crossing projection process that controls the projection unit 2 to project and display a desired crossing warning display Sy onto the road surface R.

[0015] 3 is merely an example, and may be configured to have, for example, a plurality of projection units 2 or a plurality of pedestrian detection units 3, and may be configured to be able to control them with a single control unit 4. Also, a separate calculation device equivalent to the control unit 4 may be provided, and may be configured to be able to remotely control the projection units 2 and pedestrian detection units 3 while communicating with them.

[0016] The pedestrian detection unit 3 is a sensor that detects pedestrian X attempting to enter the crosswalk PC1, and is, for example, an infrared sensor, an ultrasonic sensor, an optical sensor, or an image sensor (camera). Fig. 4 is a schematic diagram of a road surface projection device 1 according to this embodiment in which a camera is used as the pedestrian detection unit 3. In the example of Fig. 4, road surface projection devices 1 each equipped with a camera as the pedestrian detection unit 3 are installed at predetermined locations (for example, near traffic lights in Fig. 4) on both ends of the longitudinal direction D of the crosswalk PC1. The camera 3a of the road surface projection device 1 installed at one end of the crosswalk PC1 captures and detects pedestrian X1 attempting to enter the crosswalk PC1 from the other end, and the camera 3b of the road surface projection device 1 installed at the other end of the crosswalk PC1 captures and detects pedestrian X2 attempting to enter the crosswalk PC1 from the one end.

[0017] It is desirable that the pedestrian detection unit 3 detects not only pedestrian X but also pedestrians traveling on light vehicles such as bicycles and wheelchairs, that is, all subjects who cross the road in accordance with pedestrian signals.

[0018] When the pedestrian detection unit 3 (camera 3a, camera 3b) detects a pedestrian X (X1, X2) entering a crosswalk PC1 as shown in FIG. 4, the control unit 4 controls the projection unit 2 to perform a desired projection display onto a predetermined portion Z (Z1, Z2) of the road surface R. The projection unit 2 is, for example, a projector, and projects and displays a crossing warning display Sy in a predetermined display mode under the control of the control unit 4. Here, the crossing warning display Sy projected and displayed by the projection unit 2 will be specifically described.

[0019] For convenience of illustration, the crossing warning display Sy is shown with diagonal lines in each figure. However, when these projection displays are displayed in a dark place (for example, on a road at night or indoors such as a multi-story parking lot), the background is dark, so the crossing warning display Sy is projected using light of a bright color or high brightness. On the other hand, when these projection displays are displayed in a bright place (for example, on a road during the day or an outdoor facility), the background is relatively bright, so the crossing warning display Sy is projected using light of an even brighter color with a high brightness value or a color that is complementary to the color. These display modes are controlled by the control unit 4, which will be described later.

[0020] The crossing warning display Sy is projected and displayed, for example, as an animation that changes dynamically along the crossing direction of the pedestrian X. Fig. 5 is a diagram showing an example of a case in which the road surface projection device 1 according to this embodiment projects and displays the crossing warning display Sy as an animation. Fig. 5(A) shows a first example, and Fig. 5(B) shows a second example.

[0021] In Fig. 5(A), for example, suppose that a pedestrian X is detected moving from one end of the crosswalk PC1 in the length direction D (the lower side of the crosswalk PC1 in Fig. 5(A)) to the other end (the upper side of the crosswalk PC1 in Fig. 5(A)). In this case, the crossing warning display Sy is displayed as an animation in which, for example, an image in the shape of a human or other living thing (an image in the shape of a human walking in the case of Fig. 5(A)) dynamically moves from one end to the other end of the crosswalk PC1 in the length direction D.

[0022] Also, in Figure 5(B), the crossing warning display Sy is an animated representation in which an image representing a wide line, for example colored in any color, dynamically moves along the direction from one end to the other end of the length direction D of the crosswalk PC1.

[0023] The direction in which the image of the crossing warning display Sy as shown in FIG. 5 moves is preferably the same as the direction in which pedestrian X is moving, but may be the opposite direction. That is, when pedestrian X is crossing or preparing to cross from one end of the length direction D of the crosswalk PC1 to the other end, the image of the crossing warning display Sy is preferably animated to move from one end of the length direction D of the crosswalk PC1 to the other end. When pedestrian X is crossing or preparing to cross from the other end of the length direction D of the crosswalk PC1 to the one end, the image of the crossing warning display Sy is preferably animated to move from the other end of the length direction D of the crosswalk PC1 to the one end. Furthermore, when pedestrian X is crossing or preparing to cross the crosswalk PC1 in either direction, the image of the crossing warning display Sy may be animated to move in either direction, from one end of the length direction D of the crosswalk PC1 to the other end, or from the other end to the one end.

[0024] Furthermore, if a pedestrian X moving in both directions is detected, for example, two rows of predetermined regions Z displaying the crossing warning display Sy may be arranged side by side, and one predetermined region Z may display an animated image of the crossing warning display Sy moving from one end to the other in the length direction D of the crosswalk PC1, while the other predetermined region Z may display an animated image of the crossing warning display Sy moving from the other end to one end in the length direction D of the crosswalk PC1. This allows the driver DR to recognize the presence of pedestrians X crossing in both directions.

[0025] 5, the image of the crossing warning display Sy may move at the same speed as the walking speed of the pedestrian X crossing the crosswalk PC1, or may move at a speed faster than the walking speed of the pedestrian X. Alternatively, the image of the crossing warning display Sy may be displayed at a position within the predetermined region Z corresponding to the front side of the position where the pedestrian X is walking, and the position of the image of the crossing warning display Sy may be dynamically changed in accordance with the crossing speed of the pedestrian X.

[0026] Furthermore, in FIG. 5, an animation representation has been described in which the images of people and wide lines move as pedestrian X crosses the street. However, in the case of FIG. 5(A), the animation may be such that the number of people gradually increases as pedestrian X crosses the street, and in the case of FIG. 5(B), the animation may be such that the length of the wide lines gradually increases as pedestrian X crosses the street.

[0027] Furthermore, in Figure 5, the crossing warning display Sy is described as an animated representation that dynamically changes along the crossing direction of the pedestrian X, but the crossing warning display Sy does not need to be an animated representation and may be a still image projected and displayed.

[0028] Furthermore, in Fig. 5, the crossing warning display Sy is projected and displayed along the entire length of the crosswalk PC1 in the longitudinal direction D of the crosswalk PC1, but the crossing warning display Sy may be projected and displayed only in the lane on the side where the vehicle C will pass before entering the crosswalk PC1. That is, in the example of Fig. 2, the crossing warning display Sy may be projected and displayed only in the upper half of the predetermined portion Z1.

[0029] Here, a more specific display mode of the crossing warning display Sy will be described below. Fig. 6 is a diagram showing a specific example of a display mode when the crossing warning display Sy is projected and displayed for the driver DR of a right-turning vehicle C1 making a right turn at an intersection by the road surface projection device 1 according to this embodiment. As shown in Fig. 6, in the process of projecting and displaying the crossing warning display Sy, the control unit 4 projects and displays the crossing warning display Sy at a predetermined location Z1 adjacent to the inside side of the first intersection CR1 (the left side of the crosswalk PC1 in Fig. 6) of the crosswalk PC1 that the right-turning vehicle C1 heading from the bottom to the top of the drawing will pass after turning right at the first intersection CR1 (shown as a four-way intersection in Fig. 6, but also including other intersections such as a T-junction) at a first intersection CR1 where the right-turning vehicle C1 may occur.

[0030] In this case, as described above, when pedestrian X is crossing or preparing to cross the crosswalk PC1, the crossing warning display Sy as shown in Fig. 5 may be projected and displayed regardless of the direction of movement, but it is preferable to control the image of the crossing warning display Sy to move in the same direction as the direction of movement of pedestrian X, particularly when pedestrian X is detected crossing from bottom to top in Fig. 6. In other words, using the crossing warning display Sy to notify the driver DR of the presence of pedestrian X who is in a position that is likely to be in the driver's blind spot can help prevent accidents.

[0031] 7 is a diagram showing a specific example of a display mode in which the road surface projection device 1 according to this embodiment projects and displays a crossing warning display Sy to a driver DR of a left-turning vehicle C2 making a left turn at an intersection. As shown in Fig. 7, in the process of projecting and displaying the crossing warning display Sy, the control unit 4 projects and displays the crossing warning display Sy at a predetermined location Z1 adjacent to the inside of the second intersection CR2 (to the left of the crosswalk PC1 in Fig. 7) of the crosswalk PC1 that the left-turning vehicle C2 heading from above to below will pass after turning left at the second intersection CR2 (shown as a four-way intersection in Fig. 7, but including other intersections such as a T-junction).

[0032] 6, when pedestrian X is crossing or preparing to cross the crosswalk PC1, the crossing warning display Sy as shown in FIG. 5 may be projected and displayed regardless of the direction of movement, but it is preferable to control the image of the crossing warning display Sy to move in the same direction as the direction of movement of pedestrian X, particularly when pedestrian X is detected crossing from top to bottom in FIG. 7. In other words, using the crossing warning display Sy to notify the driver DR of the presence of pedestrian X who is in a position that is likely to be in the driver's blind spot can help prevent accidents.

[0033] Fig. 8 is a diagram showing a specific example of a display mode in which the road surface projection device 1 according to this embodiment projects and displays the crossing warning display Sy to the driver DR of a straight-moving vehicle C3 passing through an intersection. As shown in Fig. 8, in the process of projecting and displaying the crossing warning display Sy, the control unit 4 projects and displays the crossing warning display Sy at a location adjacent to the outer side of the third intersection CR3 (to the lower right of the crosswalk PC1 in Fig. 8) of the crosswalk PC1 that the straight-moving vehicle C3 passing through first at the third intersection CR3 (shown as a four-way intersection in Fig. 8, but also including other intersections such as a T-junction) that the straight-moving vehicle C3 passing from right to left at the third intersection CR3.

[0034] As described above, when the pedestrian X is crossing or preparing to cross the crosswalk PC1, the image of the crossing warning display Sy as shown in Fig. 5 may be projected and displayed within the area of ​​the predetermined portion Z2 regardless of the direction of movement of the pedestrian X, or the image of the crossing warning display Sy may be controlled to move within the area of ​​the predetermined portion Z2 in the same direction as the direction of movement of the pedestrian X. Furthermore, regardless of the direction of movement of the pedestrian X, a still image such as a stop line as shown in Fig. 8 may be projected and displayed as the crossing warning display Sy.

[0035] 8, the crossing warning display Sy may also be projected and displayed beyond the crosswalk PC1 of the straight-moving vehicle C3 heading from right to left (the left side of the crosswalk PC1 in FIG. 8, which corresponds to the predetermined portion Z1). In this case, the crossing warning display Sy may not be projected toward the straight-moving vehicle C3 on the oncoming lane side of the straight-moving vehicle C3 (the upper left side of the crosswalk PC1 in FIG. 8 (corresponding to the upper half of the predetermined portion Z1)), but may be projected and displayed toward the driver DR of the straight-moving vehicle C3 only on the driving lane side of the straight-moving vehicle C3 (the lower left side of the crosswalk PC1 in FIG. 8 (corresponding to the lower half of the predetermined portion Z1)).

[0036] Next, the operation of the road surface projection device 1 will be described. FIG. 9 is a flowchart showing the operation of the road surface projection device 1 according to this embodiment. First, the pedestrian detection unit 3 captures an image of the periphery of the crosswalk PC (S1). The control unit 4 analyzes the captured image of the pedestrian detection unit 3 and determines whether or not a pedestrian X is present (S2). If a pedestrian X is not detected, the process of S1 is repeated until a pedestrian X is detected. If a pedestrian X is detected, the control unit 4 specifies a display mode of the crossing warning display Sy that matches the walking situation of the pedestrian X (S3). The control unit 4 controls the projection unit 2 so that the crossing warning display Sy is projected onto the road surface R in the display mode specified in S3, and the projection unit 2 projects and displays the crossing warning display Sy (S4) (crossing projection process). Then, the process returns to S1 and the subsequent processes are repeated.

[0037] In the above explanation, the road surface R on which the crosswalk PC is provided is described as the target of the projection display, but the road surface R at a local intersection, for example, where there are no traffic lights or crosswalk PC, may also be the target of the projection display.

[0038] 6 to 8, the crossing warning display Sy is projected and displayed at a predetermined location Z1 adjacent to the side of the crosswalk PC1 from which the vehicle C is approaching. However, the crossing warning display Sy may also be projected and displayed at a predetermined location Z3 adjacent to the side opposite the side of the crosswalk PC1 from which the vehicle C is approaching. FIG. 10 is a diagram showing a specific example of a display mode in which the crossing warning display Sy is projected and displayed at the side opposite the side of the crosswalk PC1 from which the vehicle C is approaching, using the road surface projection device 1 according to this embodiment. For example, as shown in FIG. 10, there is a case in which a pedestrian X3 suddenly crosses the crosswalk PC1 diagonally from the outside (a location where the crosswalk PC1 is not provided) immediately after the vehicle C makes a right or left turn. In such a case, as shown in Fig. 10, by projecting and displaying the crossing warning display Sy on the side of the crosswalk PC1 from which the vehicle C approaches (the upper left side of the crosswalk PC1 in Fig. 10 (corresponding to the upper half of the area of ​​the predetermined portion Z1)) and the opposite side (the upper right side of the crosswalk PC1 in Fig. 10 (corresponding to the area of ​​the predetermined portion Z3)), the driver DR can be made aware of even an irregular case such as the approach of pedestrian X3 in advance. In this case, the crossing warning display Sy may be projected and displayed as an animation or a still image only on the lane in which the vehicle C is traveling (only on the predetermined portion Z3) or across the entire width of the lane including the oncoming lane (the area combining the predetermined portion Z2 and the predetermined portion Z3).

[0039] As described above, when projecting and displaying the crossing warning display Sy at each of the predetermined locations Z1, Z2, and Z3, this may be done using one road surface projection device 1 as shown in Figure 10, or a configuration may be used in which a road surface projection device 1 corresponding to each of the predetermined locations Z is provided.

[0040] In this way, the road surface projection device 1 according to this embodiment is a road surface projection device 1 that is set up so that a road surface R on which a crosswalk PC is provided is used as a projection target, and is equipped with a projection unit 2 that performs a desired projection display onto the road surface R, a pedestrian detection unit 3 that detects pedestrian X who is in a state of crossing the crosswalk PC or preparing to cross, and a control unit 4. When the pedestrian detection unit 3 detects pedestrian X, the control unit 4 executes a crossing projection process in which the projection unit 2 projects a crossing warning display Sy onto the road surface R at a predetermined location Z adjacent to at least one of the first widthwise side or the second widthwise side of the crosswalk PC to notify the driver DR of the vehicle C that pedestrian X will be crossing. This makes it possible to reliably make the driver DR aware not only of the existence of the crosswalk PC, but also of the presence of pedestrian X crossing the crosswalk PC.

[0041] Furthermore, if necessary, in the crossing projection process, the control unit 4 projects the crossing warning display Sy onto a predetermined location Z that is adjacent to at least the side of the crosswalk PC from which the vehicle C is approaching, out of the first and second widthwise sides of the crosswalk PC. Since the projected display does not overlap with the white lines of the crosswalk PC and is therefore easy to see, the driver DR of the vehicle C approaching the crosswalk PC can be reliably notified that a pedestrian X is crossing the crosswalk PC in front of him.

[0042] Furthermore, as necessary, in the crossing projection process, the control unit 4 projects a crossing warning display Sy at a predetermined location Z1 adjacent to the inside of the first intersection CR1 of the crosswalk PC1 that the right-turning vehicle C1 will pass through after turning right at the first intersection CR1 where the right-turning vehicle C1 may occur, thereby making the right-turning vehicle C1 aware that it should be careful because there is a crossing pedestrian X blocking its right-turn progress. In this case, the warning can be further emphasized by projecting and displaying an animated image of a person as shown in Fig. 5(A).

[0043] Furthermore, as necessary, in the crossing projection process, the control unit 4 projects the crossing warning display Sy at a predetermined location Z1 adjacent to the inside of the second intersection CR2 at the crosswalk PC1 that the left-turning vehicle C2 will pass through after turning left at the second intersection CR2 where the left-turning vehicle C2 may occur, thereby making the left-turning vehicle C2 aware that it should be careful because there is a crossing pedestrian X blocking its left-turn progress. In this case, the warning can be further emphasized by projecting and displaying an animated image of a person as shown in Fig. 5(A).

[0044] Furthermore, if necessary, in the crossing projection process, the control unit 4 projects the crossing warning display Sy onto a predetermined location Z2 adjacent to the outside of the third intersection CR3 at the crosswalk PC1 that the straight-moving vehicle C3 passes first at the third intersection CR3 through which the straight-moving vehicle C3 passes, thereby making the straight-moving vehicle C3 aware that it should be careful because there is a pedestrian X crossing the road who is blocking its progress.

[0045] Furthermore, as necessary, in the crossing projection process, the control unit 4 controls the irradiation of light from the projection unit 2 so that the crossing warning display Sy changes dynamically along the crossing direction of the pedestrian X and is displayed as an animation, thereby making it possible to make the driver DR more aware of the presence of the crossing pedestrian X by dynamically displaying it. In particular, the pedestrian X, who is in the blind spot of the driver DR, can be attracted to the right-turning vehicle C1 and the left-turning vehicle C2.

[0046] Furthermore, if necessary, in the crossing projection process, the control unit 4 controls the irradiation of light from the projection unit 2 so that the image in the shape of a human or other living thing as the crossing warning display Sy changes dynamically along the direction from one side of the length direction D of the crosswalk PC to the other side of the length direction D, making it easier for the driver DR to clearly notice the presence of the pedestrian X than when a simple shaped pattern is displayed. [Explanation of symbols]

[0047] C vehicle C1 Right-turning vehicle C2 Left-turning vehicle C3 Straight-moving vehicle CR1 1st Intersection CR2 2nd Intersection CR3 3rd Intersection D Lengthwise DR Driver PC (PC1~PC4) Crosswalk R road surface Sy Crossing Warning Display W width direction X(X1~X3) Pedestrian Z(Z1~Z3) Specified part 1 Road projection device 2 Projection section 3 Pedestrian detection unit 3a Camera 1 3b Second camera 4. Control section

Claims

1. A road surface projection device that is installed to project onto a road surface on which a pedestrian crossing is provided, a projection unit that projects a desired image onto the road surface; a pedestrian detection unit that detects a pedestrian who is in a crossing state or preparing to cross the crosswalk; a control unit, The control unit When the pedestrian detection unit detects the pedestrian, a crossing notification display is projected onto the road surface by the projection unit at a predetermined location adjacent to at least one of a first width direction side or a second width direction side of the crosswalk to notify a driver of the pedestrian crossing. A road surface projection device characterized by:

2. The control unit, in the transverse projection processing, The crossing warning display is projected onto the predetermined portion adjacent to at least one of the first width direction side and the second width direction side of the crosswalk, the predetermined portion being adjacent to the side of the crosswalk from which the vehicle approaches.

2. The road surface projection device according to claim 1.

3. The control unit, in the transverse projection processing, At a first intersection where a right-turning vehicle may occur, the crossing warning display is projected onto the predetermined portion adjacent to the inside of the first intersection of the crosswalk through which the right-turning vehicle will pass after turning right.

3. The road surface projection device according to claim 2.

4. The control unit, in the transverse projection processing, At a second intersection where a left-turning vehicle may occur, the crossing warning display is projected onto the predetermined portion adjacent to the inside of the second intersection of a crosswalk through which the left-turning vehicle will pass after turning left.

3. The road surface projection device according to claim 2.

5. The control unit, in the transverse projection processing, At a third intersection through which a straight-moving vehicle passes, the crossing warning display is projected onto the predetermined portion adjacent to the outside of the third intersection of a crosswalk that the straight-moving vehicle passes first.

3. The road surface projection device according to claim 2.

6. The control unit, in the transverse projection processing, The projection unit controls the projection of the light so that the crossing warning display changes dynamically along the crossing direction of the pedestrian and is displayed as an animation.

6. The road surface projection device according to claim 1, wherein the projection image is projected onto a road surface.

7. The control unit, in the transverse projection processing, The projection unit controls the projection of the light so that the image of a human or other living thing serving as the crossing warning display changes dynamically along a direction from one side of the crosswalk to the other side of the crosswalk.

7. The road surface projection device according to claim 6.

8. The control unit, in the transverse projection processing, The projection unit controls the projection of the light so that the animation representation is faster than the walking speed of the pedestrian.

7. The road surface projection device according to claim 6.

Images