JP2018185764A - Light presentation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light presentation device capable of appropriately presenting information.SOLUTION: A light presentation device 1 comprises: an acquisition unit 2 for acquiring information on a risk degree which is an index indicating a risk of collision between an object with a risk of collision in front of a vehicle V and the vehicle V; a display unit 3 for displaying a notification graphic; and a control unit 4 for controlling the display unit 3 on the basis of a risk degree acquired by the acquisition unit 2 to display a notifying graphic. The control unit 4 controls the display unit 3 on the basis of the risk degree predicted at a time of display to change a size of the notifying graphic and display it.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical presentation device.

  As a conventional light presentation device applied to a vehicle, for example, Patent Document 1 discloses a light emitting device that emits light along at least one side of a windshield glass, a first direction end of the light emitting device, and a first light emitting device. A vehicle display device is disclosed that includes a light emission control circuit that controls light emission of a light emitting device so that the state of light emission is continuously changed between an end of a first direction and a second direction opposite to the first direction.

JP 2003-054334 A

  By the way, the vehicle display device described in Patent Document 1 described above has room for further improvement in terms of more appropriate information presentation, such as a display that is easier to understand.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an optical presentation device capable of appropriately presenting information.

  In order to achieve the above object, the light presenting apparatus according to the present invention acquires information related to a degree of risk, which is an index representing the risk of a collision between an object at risk of a collision in front of the vehicle and the vehicle. A display unit that displays a notification graphic, and a control unit that controls the display unit based on the degree of risk acquired by the acquisition unit to display the notification graphic. The display unit is controlled based on the predicted degree of risk, and the size of the notification graphic is changed and displayed.

  Moreover, in the said light presentation apparatus, the said control part controls the said display part, the said alerting | reporting figure is displayed relatively enlarged, so that the said danger level is relatively high, and the said danger level is relatively low The notification graphic can be displayed with a relatively small size.

  Further, in the light presentation device, the control unit controls the display unit to display the blinking speed of the notification graphic relatively faster as the risk level is relatively higher, and the risk level is relatively higher. The lower the speed, the slower the blinking speed of the notification graphic can be displayed.

  Moreover, in the said light presentation apparatus, the said control part controls the said display part, changes the magnitude | size of the said alert | reporting figure in steps according to the said risk, and repeatedly displays the said risk. The higher the repetition rate, the higher the repetition rate, and the lower the danger level, the lower the repetition rate.

  In the light presentation device, the risk may be determined based on a relative distance between the object and the vehicle or a relative speed between the object and the vehicle.

  The light presenting apparatus according to the present invention controls the display unit based on the degree of risk acquired by the acquisition unit and predicted at the time of display by the control unit, and changes the size of the notification graphic to display the risk level. Since changes can be informed intuitively in advance, there is an effect that information can be presented appropriately.

FIG. 1 is a block diagram illustrating a schematic configuration of the optical presentation device according to the embodiment. Drawing 2 is a mimetic diagram showing the example of presentation of a notice figure by the optical presentation device concerning an embodiment. FIG. 3 is a schematic cross-sectional view illustrating a schematic configuration of the optical presentation device according to the embodiment. FIG. 4 is a flowchart illustrating an example of display control in the light presentation device according to the embodiment. FIG. 5 is a diagram illustrating an example of a risk map in the light presentation device according to the embodiment. FIG. 6 is a diagram illustrating an example of a light presentation intensity map in the light presentation apparatus according to the embodiment. FIG. 7 is a diagram illustrating an example of the size transition of the notification graphic in the light presentation device according to the embodiment. FIG. 8 is a diagram illustrating an example of the size transition of the notification graphic in the light presentation device according to the embodiment. FIG. 9 is a flowchart illustrating an example of display control in the light presentation device according to the modification.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment]
A light presentation device 1 according to the present embodiment shown in FIGS. 1, 2, and 3 is applied to a vehicle V, and displays and provides various information using light. For example, the light presentation device 1 is mounted on an instrument panel IP of a vehicle V, emits display light toward a windshield WS (a so-called windshield provided at the front of the vehicle V), and is reflected by the windshield WS. Various information is presented to the driver or the like by an image to be displayed or display light or the like that directly reaches the driver or the like without being reflected by the windshield WS or the like. Hereinafter, the configuration of the light presentation device 1 will be described in detail with reference to the drawings.

  Specifically, the light presentation device 1 includes an acquisition unit 2, a display unit 3, and a control unit 4.

  The acquisition unit 2 acquires various information related to the vehicle V. The acquisition unit 2 is electrically connected to the detection device 5, and an electric signal corresponding to the detection result is input from the detection device 5. The detection device 5 includes various sensors and detectors that detect the state of the vehicle V on which the light presentation device 1 is mounted. As the various sensors and detectors, the detection device 5 includes, for example, various radars and sonars that monitor the presence or absence of an external object around the vehicle V, the front view of the vehicle V, the white line of the lane in which the vehicle V travels, An imaging device such as a CCD camera that continuously captures an image, a vehicle speed sensor that detects the vehicle speed of the vehicle V, an acceleration sensor that detects acceleration acting on the vehicle body of the vehicle V in each direction, and current position information (GPS information) of the vehicle V GPS receiver for receiving vehicle, vehicle-to-vehicle communication device for communicating with other vehicles around vehicle V, road-to-vehicle communication device for communicating between vehicle V and roadside devices arranged along the travel route Further, it may include at least one of inter-pedestrian communication devices that perform communication between the vehicle V and a terminal possessed by the pedestrian. The acquisition unit 2 is information representing the state of the vehicle V detected by the detection device 5 (information on the presence or absence of an external object around the vehicle V, an image of a front view of the vehicle V, white line information of a lane in which the vehicle V is traveling, Vehicle speed of the vehicle V, acceleration generated in the vehicle V, current position information (GPS information) of the vehicle V, other vehicle information, roadside machine information, pedestrian information, etc.) are acquired. The detection device 5 may include a processing unit itself such as an ECU (Electronic Control Unit) that controls each unit in the vehicle V, and the acquisition unit 2 acquires various information from the processing unit such as the ECU. You can also. The acquisition unit 2 is also electrically connected to a storage unit 4a (ROM, RAM) of the control unit 4 to be described later, and can also acquire various types of acquired information in the storage unit 4a. In FIG. 1, the detection device 5 is illustrated as being configured separately from the light presentation device 1, but is not limited thereto, and may be configured as a part of the light presentation device 1. The presentation device 1 may be configured to include the detection device 5.

  The display unit 3 displays various visible information regarding the vehicle V at a position where the driver can visually recognize the vehicle V in the traveling direction front side. For example, the display unit 3 displays the visible information at a position where the driver can visually recognize with the peripheral visual field of the vehicle V while looking straight ahead in the traveling direction of the vehicle V, so that the display unit 3 does not feel intuitive and bothersome. Although information is presented, the present invention is not limited to this, and visible information may be displayed at a position where it can be visually recognized in the central visual field. The display unit 3 may be a so-called head-up display (HUD) type light presentation unit that reflects display light with a transparent member such as a windshield WS and visually recognizes the display light. It may be a so-called direct-viewing type light presenting unit that allows direct visual recognition without using reflections. The display unit 3 of the present embodiment is disposed on an instrument panel IP on the lower side in the vertical direction of the windshield WS provided in the front part of the vehicle V, here a transparent member that transmits light provided in the vehicle V, Various information is presented by emitting light toward the windshield WS and projecting an image (reflected image) 6 of the light onto the windshield WS. Here, the display unit 3 emits light upward in the vertical direction toward the windshield WS. The image 6 reflected on the windshield WS by the display light emitted from the display unit 3 is a so-called virtual image that is visible from the viewing position EP. More specifically, the display unit 3 displays on the windshield WS an image 6 of light emitted to the windshield WS and reflected by the windshield WS toward the viewing position EP. Here, the display unit 3 displays and presents the motif 7 as, for example, a relatively simple figure on the windshield WS by the image 6 of the light reflected by the windshield WS toward the viewing position EP. Here, the motif 7 is a figure extending along the vehicle width direction of the vehicle V (a direction along the width of the vehicle V and typically a direction perpendicular to the straight traveling direction of the vehicle V). In the motif 7, various events (for example, approach of pedestrians, surrounding vehicles, obstacles, etc.) that should be alerted to the driver of the vehicle V according to the driving situation of the vehicle V, for example, occurred. In this case, a notification graphic for notifying the occurrence of the event is formed. The motif 7 is preferably a relatively simple figure that can be intuitively recognized by the driver or the like. In the example of FIG. 2, the motif 7 is a substantially elliptic figure extending along the vehicle width direction. However, for example, a substantially oval shape, a substantially wavy shape, a substantially rectangular shape, or the like may be used. The display unit 3 includes, for example, a device including a light source that emits display light toward the windshield WS, and a plurality of light emitting elements such as a light emitting diode (LED) and a bulb bulb are arranged in the vehicle width direction. And an optical indicator, a laser irradiation device for irradiating laser light, a liquid crystal display for displaying an image, a plasma display, an image display device such as an organic EL display, and the like.

  The control unit 4 controls the display unit 3 to display various information on the display unit 3. The control unit 4 is configured to include an electronic circuit mainly composed of a well-known microcomputer including a CPU, a ROM that constitutes the storage unit 4a, a RAM, and an interface. The control unit 4 is electrically connected to the acquisition unit 2 and receives an electrical signal corresponding to the information acquired by the acquisition unit 2. The control unit 4 is electrically connected to the display unit 3 and outputs a drive signal to the display unit 3. The control unit 4 controls the drive of the display unit 3 by outputting a drive signal to the display unit 3 by executing a stored control program based on various input signals input from the acquisition unit 2 and the like. To do.

  The control unit 4 typically controls the display unit 3 based on various information acquired by the acquisition unit 2 and controls display by the display unit 3. For example, if the control unit 4 determines that an event that requires attention, such as the approach of a pedestrian, a nearby vehicle, or an obstacle, has occurred based on various information acquired by the acquisition unit 2, the display unit 3 The display light is emitted toward the windshield WS, the image 6 by the light is displayed on the windshield WS, and the motif 7 is presented. Thereby, the light presentation apparatus 1 can notify the driver or the like of the occurrence of the event. Moreover, the control part 4 can also control the display part 3 according to the change of the event which should call attention, and can change the image 6 reflected on the windshield WS, and can also change the motif 7. FIG. For example, when a pedestrian, a surrounding vehicle, an obstacle, or the like approaches the vehicle V, the control unit 4 controls the display unit 3 so that the driver can intuitively recognize the approach direction. The motif 6 is changed by changing the image 6 such as displaying the motif 7 so as to flow in the direction of. Note that the control unit 4 does not determine whether or not an event that requires attention has occurred, and sends a command signal generated based on a determination result determined by a processing unit such as an ECU via the acquisition unit 2. The display unit 3 may be controlled based on the command signal, and the display by the display unit 3 may be controlled.

  In the light presentation device 1 according to the present embodiment, the acquisition unit 2 acquires information on the risk level, and the control unit 4 controls the display unit 3 based on the risk level to display the motif 7 as a notification graphic. In this way, more appropriate information is presented.

  Here, the degree of risk acquired by the acquisition unit 2 is an index (parameter) that represents the risk of collision between the object OB having a risk of collision in front of the vehicle V and the vehicle V, and typically. It is determined based on the relative distance between the object OB and the vehicle V, the relative speed between the object OB and the vehicle V, or the like. The object OB at risk of collision in front of the vehicle V is, for example, a pedestrian, a surrounding vehicle, an obstacle, etc., and is illustrated as being a preceding vehicle Va traveling in front of the vehicle V in the example of FIG. ing. The danger level indicates that the risk of collision with the object OB is relatively high as the risk level is relatively high, and the risk of collision with the object OB is relatively low as the risk level is relatively low. The degree of risk acquired by the acquisition unit 2 is, for example, a so-called TTC (Time-To-Collision) corresponding to the time until the vehicle V reaches the object OB, 1 / TTC which is the reciprocal of TTC, optical It is possible to use a so-called tau dot that is the rate of change of the target τ and a risk evaluation index such as so-called KdB that is an approaching / separating state evaluation index. Here, as an example, it is assumed that the approach / separation state evaluation index KdB is used as the risk.

More specifically, the approaching / separating state evaluation index KdB used as the risk level is determined by the driver of the vehicle V performing acceleration / deceleration operations while detecting approaching / separating based on a visual area change of the object OB (preceding vehicle Va). It is an index that is defined based on the hypothesis that it is conducted. When the relative distance between the vehicle V and the object OB is “x _r ” and the relative speed between the vehicle V and the object OB is “v _r ”, the approaching / separating state evaluation index KdB is, for example, ). The approaching / separating state evaluation index KdB indicates that the risk level is relatively high as it is relatively high, and the risk level is relatively low as it is relatively low.

The control unit 4 calculates the approaching / separating state evaluation index KdB used as the risk from the mathematical formula (1) based on the relative distance x _r , the relative speed v _{r, and the} like included in various information acquired by the acquiring unit 2. Can do. The control unit 4 controls the display unit 3 based on the approaching / separating state evaluation index KdB to control the display by the display unit 3.

  Note that the control unit 4 does not calculate the approach / separation state evaluation index KdB used as the risk level, but obtains the approach / separation state evaluation index KdB calculated by a processing unit such as an ECU constituting the detection device 5. The display unit 3 may be controlled as follows based on the acquired approach / separation state evaluation index KdB to control the display by the display unit 3.

  And the control part 4 of this embodiment changes the light presentation intensity | strength at the time of displaying the motif 7 by the display part 3 based on the danger degree estimated at the time of a display, here, the approach / separation state evaluation parameter | index KdB. Information is presented to the driver or the like according to the degree of risk (approaching / separating state evaluation index KdB). The controller 4 relatively increases the light presentation intensity and relatively increases the stimulus given to the driver's vision as the degree of danger (approach and separation state evaluation index KdB) is relatively high. The lower the state evaluation index KdB), the lower the light presentation intensity and the weaker the stimulus given to the driver's vision.

  Here, the control unit 4 controls the display unit 3 on the basis of the approaching / separating state evaluation index KdB used as the degree of risk and changes the size of the motif 7 that is a notification graphic to display the light by the display unit 3. Change the presentation intensity. The control unit 4 relatively increases the risk (the approach / separation state evaluation index KdB) and displays the motif 7 to be relatively large, thereby making the stimulus given to the driver's vision relatively strong. As the approaching / separating state evaluation index KdB) is relatively low, the motif 7 is displayed relatively small, and the stimulus given to the driver's vision is relatively weakened.

  Next, an example of display control of the display unit 3 by the control unit 4 will be described with reference to the flowchart of FIG. These control routines are repeatedly executed at a control cycle (clock unit) every several ms to several tens of ms.

First, the control unit 4 acquires the degree of risk via the acquisition unit 2 or the like (step ST1). The control unit 4 calculates an approach / separation state evaluation index KdB used as a risk from the above-described equation (1) based on the relative distance x _r , the relative speed v _{r, and the} like included in various information acquired by the acquisition unit 2. Alternatively, the approaching / separating state evaluation index KdB calculated by a processing unit such as an ECU constituting the detection device 5 may be acquired via the acquisition unit 2.

  Next, the control unit 4 calculates a predicted risk that is a risk after elapse of a predetermined time (for example, about several seconds) set in advance based on the risk (approach and separation state evaluation index KdB) acquired in step ST1. (Step ST2). More specifically, the control unit 4 uses the acquired current risk level (approaching / separating state evaluation index KdB) as the risk level at the display time point, and calculates the predicted risk level based on the risk level at the display time point. . For example, the control unit 4 may calculate the predicted risk (predicted approach / separation state evaluation index KdB) based on the risk map m1 illustrated in FIG. In the risk map m1, the horizontal axis indicates the time axis (t), and the vertical axis indicates the risk (approaching state evaluation index KdB). The risk map m1 describes the relationship between time and risk. The risk map m1 is stored in the storage unit 4a of the control unit 4 after the relationship between the time and the risk level is set in advance based on actual vehicle evaluation and the like. Generally speaking, in the risk map m1, the risk increases with an increase in elapsed time, and the amount of change tends to increase with an increase in elapsed time. Based on the risk map m1, the control unit 4 performs the risk at time t2 after a predetermined time (for example, about several seconds) has elapsed from the risk (approaching / separating state evaluation index KdB) k1 at the acquired display time point (current time) t1. The degree k2 is calculated, and this is set as the predicted risk (predicted approaching / separating state evaluation index KdB). In the present embodiment, the control unit 4 has been described as calculating the predicted risk (predicted approaching / separating state evaluation index KdB) using the risk map m1, but the present embodiment is not limited to this. For example, the control unit 4 may calculate the predicted risk based on a mathematical model corresponding to the risk map m1 (the map described below is also the same).

  Next, the control part 4 calculates the light presentation intensity | strength at the time of displaying the motif 7 by the display part 3 based on the prediction risk (predicted approach / separation state evaluation index KdB) calculated by step ST2 (step ST3). . For example, the control unit 4 may calculate the light presentation intensity based on the light presentation intensity map m2 illustrated in FIG. In the light presentation intensity map m2, the horizontal axis indicates the degree of danger (approach and separation state evaluation index KdB), and the vertical axis indicates the light presentation intensity (size). The light presentation intensity map m2 describes the relationship between the degree of danger and the light presentation intensity. The light presentation intensity map m2 is stored in the storage unit 4a of the control unit 4 after the relationship between the degree of danger and the light presentation intensity is set in advance based on actual vehicle evaluation and the like. In the light presentation intensity map m2, generally speaking, the light presentation intensity increases as the degree of danger increases, and the amount of change tends to increase as the degree of danger increases. The light display intensity means that the motif 7 is relatively enlarged and displayed as the light intensity increases, and the stimulus given to the driver's vision is relatively strong. The smaller the light presentation intensity is, the smaller the motif 7 is displayed. This means that the stimulus given to the driver's vision is relatively weakened. The control unit 4 calculates the light presentation intensity e2 after a predetermined time (for example, about several seconds) from the calculated predicted risk (predicted approaching / separating state evaluation index KdB) k2 based on the light presentation intensity map m2. The light presentation intensity e1 in FIG. 6 corresponds to a value based on the degree of danger (approaching / separating state evaluation index KdB) k1 at the display time (current time) t1.

  And the control part 4 controls the display part 3 based on the light presentation intensity | strength calculated from the prediction risk after predetermined time progress by step ST3, changes the magnitude | size of the motif 7 according to the said prediction risk, and displays it. (Step ST4), the current control cycle is terminated, and the process proceeds to the next control cycle. The control unit 4 causes the motif 7 to be displayed in a relatively large size as the predicted risk level is relatively high, and makes the stimulus given to the driver's vision relatively strong. On the other hand, the control unit 4 causes the motif 7 to be displayed in a relatively small size as the prediction risk level is relatively low, and relatively weakens the stimulus given to the driver's vision. In this case, for example, as illustrated in FIG. 7, the control unit 4 increases the motif 7 in a stepwise manner along a predetermined direction, here the vehicle width direction, as the prediction risk becomes relatively high. As illustrated in FIG. 8, the motif 7 may be displayed in a stepwise manner in all directions as the prediction risk becomes relatively high. Note that the arrows in FIGS. 7 and 8 are for easy-to-understand illustration of the transition of the size change of the motif 7 and are not actually displayed on the display unit 3.

  For example, the control unit 4 may control the display unit 3 to add a flow that enlarges the motif 7 from the center side toward the outside. Further, the control unit 4 controls the display unit 3 in addition to changing the size of the motif 7 according to the predicted risk level, and the blinking speed of the motif 7 is relatively faster as the predicted risk level is higher. The motif 7 may be displayed with a relatively slow blinking speed as the predicted risk level is relatively low. Alternatively, the control unit 4 controls the display unit 3 in addition to changing the size of the motif 7 according to the predicted risk, and repeatedly displays the size in steps according to the predicted risk, The higher the prediction risk, the higher the repetition rate may be displayed, and the lower the prediction risk, the lower the repetition rate may be displayed. Moreover, the control part 4 may make it attach | subject the flow which goes to the downward direction from the vertical direction as a display aspect of the motif 7, for example, or it is the back side from the front side along the advancing direction (depth direction) of the vehicle V. You may make it attach the flow which goes to.

  According to the light presentation device 1 described above, the acquisition unit 2 that acquires information on the degree of risk, which is an index representing the risk of collision between the object OB at risk of collision in front of the vehicle V and the vehicle V. And a display unit 3 that displays the motif 7 and a control unit 4 that controls the display unit 3 to display the motif 7 based on the degree of risk acquired by the acquisition unit 2, and the control unit 4 predicts at the time of display. The display unit 3 is controlled based on the degree of danger to be displayed, and the size of the motif 7 is changed and displayed. Therefore, the light presenting device 1 controls the display unit 3 based on the degree of risk acquired by the acquisition unit 2 and predicted at the time of display by the control unit 4 to change the size of the motif 7 and display it. Since the change in the degree can be intuitively notified in advance, information can be appropriately presented. Thereby, the light presentation apparatus 1 can deal with danger with a margin for the driver or the like.

For example, the recommended value of the relationship between the moving speed of the light stimulus by the motif 7 (in other words, the changing speed of the size of the motif 7 or the flow speed) and the approaching / separating state evaluation index KdB used as the risk is When the state evaluation index KdB is “X”, it can be expressed by the following mathematical formula (2) as an example.

Moving speed of light stimulus = 22.2266 · X-622.39 (2)

For example, when the vehicle V is approaching the preceding vehicle Va as the object OB at a relative speed of 50 km / h, KdB = 35 at a point where TTC = 4 [sec]. At this time, the recommended value of the moving speed of the light stimulus is about 157 [mm / sec]. Here, when the light stimulus is presented by the motif 7 for 2 seconds from the time point of TTC = 4 [sec], the risk level predicted at the end of the presentation is KdB = 43.9, and the movement of the light stimulus at this time The recommended value of speed is about 356 [mm / sec]. In this case, the recommended value of the moving speed of the light stimulus based on the degree of danger at the start of presentation = about 157 [mm / sec] does not conform to the degree of danger at the end of presentation. After a predetermined time has elapsed from the start of the hour, here, a predictive condition in accordance with the risk level after 2 seconds, that is, KdB = 43.9, recommended value of moving speed of the light stimulus = about 356 [mm / sec] By presenting the light stimulus with the motif 7, it is possible to inform the change in the degree of danger intuitively in advance, and it is possible to appropriately present information.

  More specifically, according to the light presentation device 1 described above, the control unit 4 controls the display unit 3 to display the motif 7 in a relatively large size as the risk level is relatively high. The lower the degree, the smaller the motif 7 is displayed. Therefore, the light presentation device 1 can inform the degree of danger more intuitively and reliably.

  Moreover, according to the light presentation apparatus 1 demonstrated above, the control part 4 controls the display part 3, and makes the blinking speed of the motif 7 relatively fast, and displays it, so that a danger level is relatively high, and dangerous. The lower the degree, the slower the blinking speed of the motif 7 may be displayed. In this case, the light presenting apparatus 1 can notify the degree of danger more intuitively and surely by changing the blinking speed.

  Moreover, according to the light presentation apparatus 1 demonstrated above, the control part 4 controls the display part 3, changes the magnitude | size of the motif 7 in steps according to a risk level, and displays repeatedly, and a risk level is also shown. A relatively high repetition rate may be displayed with a relatively high repetition rate, and a relatively low repetition rate may be displayed with a relatively low repetition rate. In this case, the light presenting apparatus 1 can notify the degree of danger more intuitively and reliably by changing the repetition rate of the stepwise size change of the motif 7.

  Further, according to the light presentation device 1 described above, the degree of risk is determined based on the relative distance between the object OB and the vehicle V or the relative speed between the object OB and the vehicle V. Therefore, the light presenting device 1 displays the relative distance between the object OB and the vehicle V or the relative speed between the object OB and the vehicle V by changing the size of the motif 7 according to the degree of danger. Accordingly, the size of the motif 7 can be changed and displayed, whereby the degree of danger can be notified intuitively according to the relative distance or the relative speed.

  The light presentation device according to the above-described embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope described in the claims.

  In the above description, the transparent member has been described as being the windshield WS, but is not limited thereto, and may be a so-called combiner formed separately from the windshield WS.

  In the above description, the display unit 3 has been described as being disposed on the instrument panel IP, but is not limited thereto, and may be disposed on a door, a dashboard, a roof, a floor, or the like.

  As the index indicating the risk described above, an index indicating the degree of approach between the vehicle V and the preceding vehicle Va used in automatic driving control such as so-called ACC (Adaptive Cruise Control) may be used. Hereinafter, an example of display control using the approach degree as an index representing the degree of risk will be described with reference to the flowchart of FIG. 9.

  In this case, the control unit 4 first acquires the preceding vehicle information related to the preceding vehicle Va of the vehicle V via the acquiring unit 2 or the like (step ST201). For example, the control unit 4 acquires, as the preceding vehicle information, an index that represents the degree of approach between the vehicle V and the preceding vehicle Va via the acquisition unit 2 or the like from a processing unit such as an ECU that performs automatic driving control. The index indicating the degree of approach acquired from a processing unit such as an ECU that performs automatic driving control is the above-described TTC, 1 / TTC, tau dot, KdB, and the like, the relative distance between the vehicle V and the preceding vehicle Va, Alternatively, another index based on the relative speed between the vehicle V and the preceding vehicle Va may be used. Here, the control part 4 uses the parameter | index showing the said approach degree acquired from process parts, such as ECU which performs automatic driving | operation control as preceding vehicle information, as a parameter | index showing a danger degree.

  Next, the control part 4 determines whether the vehicle V approached the preceding vehicle Va based on the parameter | index etc. which represent the approach degree contained in the preceding vehicle information acquired by step ST201 (step ST202). When it is determined that the vehicle V is not approaching the preceding vehicle Va (step ST202: No), the control unit 4 ends the current control cycle and shifts to the next control cycle.

  When the control unit 4 determines that the vehicle V has approached the preceding vehicle Va (step ST202: Yes), a predetermined time (for example, preset) based on the index indicating the degree of approach (risk) acquired in step ST201 (for example, The estimated approach degree (predicted risk degree), which is the approach degree after elapse of several seconds), is calculated (step ST203). Similarly to the above, the control unit 4 uses the obtained degree of approach at the present time as the degree of approach at the time of display, and based on the degree of approach at the time of display, a map similar to the risk map m1 (see FIG. 5). To calculate the predicted approach degree.

  Next, the control unit 4 is a few seconds after the preset (for example, based on the index indicating the degree of approach included in the preceding vehicle information acquired in step ST201, the index indicating the predicted degree of approach calculated in step ST203, etc.) It is determined whether or not the deceleration control based on the automatic operation control is executed after 2 seconds (step ST204). When it is determined that the deceleration control based on the automatic operation control is not executed within a predetermined number of seconds (step ST204, No), the control unit 4 ends the current control cycle and shifts to the next control cycle. .

  When it is determined that the deceleration control based on the automatic operation control is executed after a predetermined number of seconds (step ST204, Yes), the control unit 4 is based on the predicted approach degree calculated in step ST203 as described above. Then, using the same map as the light presentation intensity map m2 (see FIG. 6), the light presentation intensity for displaying the motif 7 by the display unit 3 is calculated (step ST205).

  And the control part 4 controls the display part 3 based on the light presentation intensity | strength calculated from the prediction approach degree after progress for predetermined time by step ST205, changes the magnitude | size of the motif 7 according to the said prediction approach degree, and displays it. (Step ST206), the current control cycle is terminated, and the process proceeds to the next control cycle.

  Even in this case, the light presenting device 1 displays the display unit 3 based on the degree of risk acquired by the acquisition unit 2 and predicted at the time of display by the control unit 4, here, the degree of approach with the preceding vehicle Va. By controlling and displaying the motif 7 in a different size, it is possible to intuitively inform in advance of changes in the degree of approach with the preceding vehicle Va, so that information can be presented appropriately. Thereby, for example, the light presentation device 1 can intuitively notify the driver or the like that the deceleration control is started in advance before the deceleration control based on the automatic driving control is executed. So you can deal with it.

  Note that the light presentation device 1 controls the display unit 3 based on the risk level predicted at the time of display as described above to change the size of the motif 7 to display, and further, based on the risk level. The hue, brightness, saturation, brightness, etc. of the motif 7 may be changed, and information presentation based on sound information and vibration information may be combined.

  In addition, the light presenting device 1 does not display the motif 7 itself when the risk level is equal to or lower than a preset threshold value, and displays the motif 7 only when the risk level exceeds the threshold value. May be.

  In addition, when the light presentation device 1 is connected to a device that detects the line of sight of the driver or the like, the display position of the motif 7 is adjusted according to the detected line of sight of the driver or the like. Also good.

DESCRIPTION OF SYMBOLS 1 Light presentation apparatus 2 Acquisition part 3 Display part 4 Control part 7 Motif (notification figure)
OB Object V Vehicle

Claims (5)

An acquisition unit that acquires information on a risk that is an index indicating a risk of a collision between an object at risk of a collision in front of the vehicle and the vehicle;
A display unit for displaying a notification graphic;
A control unit that controls the display unit based on the degree of risk acquired by the acquisition unit and displays the notification graphic;
The control unit controls the display unit based on the degree of risk predicted at the time of display and changes the size of the notification graphic for display.
Light presentation device. The control unit controls the display unit so that the notification graphic is relatively enlarged and displayed as the risk level is relatively high, and the notification graphic is relatively displayed as the risk level is relatively low. To make it smaller
The light presentation apparatus according to claim 1. The control unit controls the display unit to display a flashing speed of the notification graphic as the risk level is relatively high, and to display the notification graphic as the risk level is relatively low. Display the flashing speed relatively slow,
The light presentation apparatus according to claim 1 or 2. The control unit controls the display unit to repeatedly display the notification graphic by changing the size of the notification graphic stepwise according to the risk level, and relatively increases the repetition speed as the risk level is relatively high. Display faster, and display the lower repetition rate as the risk level is lower,
The light presentation apparatus according to any one of claims 1 to 3. The risk is determined based on a relative distance between the object and the vehicle or a relative speed between the object and the vehicle.
The light presentation apparatus according to any one of claims 1 to 4.

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