JP2017001525A - Vehicular display apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular display apparatus capable of improving visibility in a passenger of a vehicle recognizing the outside of the vehicle through a head-up display.SOLUTION: A display generation part generates plural movable points as a displaying projected onto a head-up display. Spots where the plural movable points are projected on the head-up display tend to not hamper visibility in recognizing outside of a vehicle through the aforementioned spots. Therefore, it is possible to improve the visibility in a passenger of the vehicle recognizing outside of the vehicle through the head-up display in comparison with the case of projecting characters. The display generation part changes content of the displaying consisting of plural movable points in accordance with content of information to be recognized by the passenger of the vehicle by the displaying, thus enabling the passenger of the vehicle to better recognize the content of the information to be recognized by the passenger thereof, in comparison with the case of simply changing features of characters.SELECTED DRAWING: Figure 4

Description

  One aspect of the present invention relates to a display device for a vehicle.

  2. Description of the Related Art Conventionally, there has been proposed an apparatus that allows a vehicle occupant to visually recognize a display projected on a head-up display mounted on a vehicle. For example, in Patent Document 1, when a character for informing the vehicle occupant of the presence of an object outside the vehicle is projected onto the windshield, the shape of the character is determined according to at least one of the risk level and the urgency level of the object. An apparatus for changing the size and position is disclosed.

JP 2009-9946 A

  By the way, in the above apparatus, there exists a fault that the passenger | crew of a vehicle cannot visually recognize the exterior of a vehicle through the location where the character of a head-up display is projected. Therefore, it is desired to improve the visibility when the vehicle occupant visually recognizes the outside of the vehicle via the head-up display.

  Accordingly, an object of the present invention is to provide a vehicle display device that can improve the visibility when a vehicle occupant visually recognizes the outside of the vehicle via a head-up display.

  One aspect of the present invention is a vehicle display device that causes a vehicle occupant to visually recognize a display projected on a head-up display mounted on a vehicle, and according to the content of information that is recognized by the vehicle occupant by the display, It is a display apparatus for vehicles provided with the display production | generation part which produces | generates a display, changing the content of the display projected on a head-up display as a several moving point.

  According to this configuration, the display generation unit generates a plurality of moving points as a display projected on the head-up display. A location where a plurality of moving points on the head-up display are projected is unlikely to be an obstacle when the outside of the vehicle is visually recognized through the location. Therefore, the visibility when the vehicle occupant visually recognizes the outside of the vehicle via the head-up display can be improved as compared with the case where the character is projected onto the head-up display. In addition, when the display generator is configured to change the content of the display composed of a plurality of moving points according to the content of information to be recognized by the vehicle occupant by the display, when the shape of the character is simply changed In comparison, it becomes easier for the vehicle occupant to grasp the contents of information that the vehicle occupant recognizes by display.

  According to one aspect of the present invention, it is possible to improve the visibility when the vehicle occupant visually recognizes the outside of the vehicle through the head-up display, and the content of information that the vehicle occupant recognizes by the display is displayed. It becomes easier to grasp.

It is a block diagram which shows the structure of the display apparatus for vehicles which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the display apparatus for vehicles of FIG. (A) is a figure which shows the sight line direction and instantaneous recognition range of the passenger | crew of a vehicle, (b) is a figure which shows the recognition range estimated from the instantaneous recognition range accumulate | stored in predetermined time. It is a figure which shows the example of the display projected on the windshield in 1st Embodiment. It is a block diagram which shows the structure of the display apparatus for vehicles which concerns on 2nd Embodiment. It is a figure which shows the sight line direction, instantaneous recognition range, recognition range, center visual field, and peripheral visual field of the passenger | crew of a vehicle. It is a figure which shows the example of the display projected on the windshield in 2nd Embodiment. It is a block diagram which shows the structure of the display apparatus for vehicles which concerns on 3rd Embodiment. It is a flowchart which shows operation | movement of the display apparatus for vehicles of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
As shown in FIG. 1, the vehicle display device 100a according to the first embodiment includes a driver sensor 1, a vehicle exterior sensor 3, a HUD (Head-Up Display) 10, and an ECU 50a. The vehicle display device 100a is a device that allows a vehicle occupant to visually recognize a display projected on the HUD 10 mounted on the vehicle. The head-up display is a device that projects the display onto a transparent object such as a windshield of the vehicle, thereby visually recognizing the display in the field of view of the vehicle occupant who is viewing the outside of the vehicle.

  The driver sensor 1 is a sensor for detecting which range outside the vehicle is recognized by a passenger such as a vehicle driver. As the driver sensor 1, a monocular camera, a stereo camera, a multi-camera, a rider (LIDER: Laser Imaging Detection and Ranging), a laser scanner, or the like can be applied. The driver sensor 1 may be a device in which a light projecting device that irradiates a specific pattern and a light receiving device such as a monocular camera or a stereo camera are combined.

  The vehicle outside sensor 3 is a sensor for detecting at least an obstacle to be avoided outside the vehicle. A radar (Radar), a rider (LIDER: Laser Imaging Detection and Ranging), a laser scanner, a monocular camera, a stereo camera, a multi camera, or the like can be applied to the outside sensor 3. When a monocular camera that cannot three-dimensionally determine the relative position of the obstacle is used as the outside sensor 3, in order to easily determine the direction of the obstacle, the mounting position of the monocular camera is set to the left and right center of the vehicle. Instead, it may be the center of the driver seat. When using a sensor capable of three-dimensionally determining the relative position of an obstacle such as a stereo camera, a multi-camera, a radar, a rider, a laser scanner, etc., the mounting position of these sensors is outside the vehicle. Selection can be made on the basis of the advantage in detecting an obstacle.

  The ECU 50a controls the operation of the vehicle display device 100a. The ECU 50a is an electronic control unit having a CPU [Central Processing Unit], a ROM [Read Only Memory], a RAM [Random Access Memory], and the like. The ECU 50a includes a recognition range estimation unit 2a, an obstacle detection unit 4, an obstacle direction estimation unit 5, a recognition determination unit 6, an obstacle identification unit 7, a display type selection unit 8, and a display generation unit 9a. In the ECU 50a, a program stored in the ROM is loaded into the RAM and executed by the CPU, thereby executing control of each part such as the recognition range estimation unit 2a. The ECU 50a may be composed of a plurality of electronic control units.

  The recognition range estimation unit 2a receives a signal from the driver sensor 1 and estimates which range outside the vehicle is recognized by an occupant such as a driver of the vehicle. Details of the method in which the recognition range estimation unit 2a estimates the recognition range recognized by the occupant will be described later.

  The obstacle detection unit 4 receives a signal from the outside sensor 3 and detects at least an obstacle to be avoided outside the vehicle. When the outside sensor 3 is a monocular camera, a three-dimensional object having a predetermined size or larger outside the vehicle may be detected by using motion stereo technology. Further, information related to the position of the vehicle by GPS (Global Positioning System) or the like and information related to the obstacle by the outside sensor 3 are recorded in association with each other, and information related to obstacles during past travel recorded at a specific position; An obstacle may be detected by comparing the information obtained by the current outside-vehicle sensor 3 at the specific position. The information regarding the obstacle and the information regarding the position of the vehicle may be information provided from a database outside the vehicle.

  The obstacle direction estimation unit 5 receives signals from the vehicle outside sensor 3 and the obstacle detection unit 4, and the obstacle detected by the vehicle outside sensor 3 is located in any direction as viewed from a passenger such as a driver of the vehicle. Estimate. When the outside sensor 3 is a monocular camera, the obstacle direction estimation unit 5 determines the direction in which the obstacle exists from the information about the mounting position of the outside sensor 3 and the information about the position of the pixel where the obstacle is detected. presume. When the vehicle exterior sensor 3 is a stereo camera, a multi-camera, a radar, a rider, or a laser scanner, the obstacle direction estimation unit 5 can directly estimate the relative position with the obstacle from the vehicle exterior sensor 3. The direction of the obstacle can be calculated from the detection result of the vehicle outside sensor 3 and the mounting position. The obstacle direction estimation unit 5 may estimate not only the direction of the obstacle but also the distance.

  The recognition determination unit 6 collates the range recognized by the occupant estimated by the recognition range estimation unit 2a with the direction of the obstacle estimated by the obstacle direction estimation unit 5, and the occupant such as the driver of the vehicle It is determined whether or not the obstacle is recognized, and it is determined whether or not the occupant is guided to recognize the obstacle by displaying the HUD 10. For example, when the direction in which the obstacle is present is not included in the range recognized by the occupant, the recognition determination unit 6 is not responsive to the occupant because the vehicle occupant does not recognize the obstacle. It can be determined to induce recognition of objects.

  The obstacle identification unit 7 receives signals from the vehicle outside sensor 3 and the obstacle detection unit 4 and identifies additional information regarding the obstacle such as the type, movement direction, and movement speed of the obstacle. When the obstacle identification unit 7 cannot identify the information such as the type of the obstacle, the obstacle identification unit 7 outputs each of the information items such as the type of the obstacle that could not be identified as being unidentifiable. Also good.

  The display type selection unit 8 is based on information such as the type of the obstacle identified by the obstacle identification unit 7 when the recognition judgment unit 6 determines that the vehicle occupant does not recognize the obstacle. The type of display generated by the display generation unit 9a is selected. Details of the process in which the display type selection unit 8 selects the type of display generated by the display generation unit 9a will be described later.

  The display generation unit 9a generates a display while changing the content of the display projected on the head-up display as a plurality of moving points in accordance with the content of information to be recognized by the vehicle occupant. Specifically, the display generation unit 9a generates a display while changing the display content according to the display type selected by the display type selection unit 8. The content of information to be recognized by the occupant means, for example, the type of obstacle and the danger level of the obstacle. Further, the content of information to be recognized by the occupant may be, for example, the positions and situations of all things to be recognized by the occupant such as a driver of a vehicle including a signal, a sign, an intersection with poor visibility, and the like. Alternatively, the content of information to be recognized by the occupant may be, for example, for the purpose of causing the occupant to recognize information such as guidance of the sight direction of the occupant, guidance of behavior such as driving operation of the occupant, and guidance of the occupant's emotion. . The display content means, for example, the type of biological motion animal displayed and the speed of the display operation as described later. Details of the display composed of a plurality of moving points and details of information to be recognized by the vehicle occupant by the display will be described later.

  The HUD 10 is a device that causes a vehicle occupant to visually recognize the display by projecting the display generated by the display generation unit 9a of the ECU 50a onto the windshield of the vehicle. In the HUD 10, the transparent object on which the display is projected may be a transparent plate-like member disposed inside or outside the vehicle other than the windshield. The HUD 10 is a head-up display that can be displayed at infinity when viewed from the passenger. The HUD 10 may be a two-dimensional head-up display capable of displaying a display superimposed on an obstacle at an arbitrary distance in front of the vehicle. Further, the HUD 10 may be a three-dimensional head-up display capable of displaying a display superimposed on the obstacle at a position where the obstacle exists. When the HUD 10 is a three-dimensional head-up display, the HUD 10 may display a display in front of a place where an obstacle exists or a position where an obstacle exists.

  Hereinafter, the process performed with the display apparatus 100a for vehicles of this embodiment is demonstrated. As shown in FIG. 2, the recognition range estimation unit 2a of the ECU 50a estimates the recognition range of an occupant such as a vehicle driver (S101). The following two methods are conceivable as methods for estimating the occupant's recognition range. The first method is a method of estimating the occupant's recognition range by accumulating the occupant's instantaneous recognition range over an arbitrary time. The second method is a method for estimating an object that is not recognized by the occupant from the behavior of the occupant.

  In the first method, the driver sensor 1 such as a monocular camera directed to an occupant such as a driver of the vehicle described above is applied. In the first method, for example, the distance from the occupant to the camera may be measured using a camera and a depth sensor, and various movements of the skeleton of the occupant may be detected by capturing the occupant on the camera. The direction of the occupant's face can be detected by the technique for estimating the three-dimensional shape of the occupant. In addition, by detecting the white eye portion and the black eye portion of the occupant's eye as seen in the camera, the sight direction of the occupant can be estimated and output as a gaze direction estimation signal. In this case, if a near-infrared light source is used, the accuracy of estimating the line-of-sight direction can be improved.

As shown in FIG. 3A, in the first method, the recognition range estimation unit 2a has a predetermined solid angle centered on the sight line direction _VL of the occupant detected by the driver sensor 1 for each discrete time. an instantaneous recognition range R _I is a range which is defined in records. As shown in FIG. 3 (b), cognitive range estimation unit 2a can estimate the range covered by the plurality of instantaneous cognitive range R _I over any time as cognitive range R _A. In this case, the recognition range estimation unit 2a, in order to improve the accuracy of the estimated cognitive range R _A, instantaneous cognitive range R _I is poured gaze over a region (long overlapping to or greater than a predetermined threshold value The recognition range R _A may be limited to a region).

  In the second method, the recognition range estimation unit 2 a or the recognition determination unit 6 is connected to the vehicle outside sensor 3 and receives a signal from the vehicle outside sensor 3. The recognition range estimation unit 2a or the recognition determination unit 6 is connected to a vehicle speed sensor, an acceleration sensor, a yaw rate sensor, and the like that detect the traveling state of the vehicle, and receives signals from the vehicle speed sensor and the like. Furthermore, the recognition range estimation unit 2a or the recognition determination unit 6 is connected to an accelerator pedal sensor, a brake pedal sensor, a steering angle sensor, and the like that detect the driving operation of the driver of the vehicle, and receives a signal from the accelerator pedal sensor and the like. On the other hand, in the second method, a camera or the like that detects the line-of-sight direction of an occupant such as a driver is not essential as in the first method.

  The recognition range estimation unit 2 a or the recognition determination unit 6 calculates the most appropriate driving operation from the information from the outside sensor 3. Whether or not the driver recognizes the obstacle detected by the outside sensor 3 by comparing the calculated most appropriate driving operation with the driving state of the vehicle and the driving operation of the driver. Can be estimated.

  For example, it is assumed that there is a low-speed other vehicle at a distance of a few tens of meters ahead of the vehicle. In this case, the most appropriate driving operation calculated from information by the outside sensor 3 detecting the other vehicle is a brake operation. Therefore, the recognition range estimation unit 2a or the recognition determination unit 6 can estimate that the driver does not recognize the other vehicle if the brake operation by the driver is not detected by the brake pedal sensor or the like.

  Returning to FIG. 2, the obstacle detection unit 4 of the ECU 50a detects an obstacle outside the vehicle (S102). The obstacle direction estimation unit 5 of the ECU 50a estimates the direction of the obstacle. The obstacle identifying unit 7 of the ECU 50a identifies additional information regarding the obstacle such as the type of obstacle, the moving direction, and the moving speed.

When there is an obstacle (S103), the recognition determination unit 6 of the ECU 50a determines whether an occupant such as a vehicle driver recognizes the obstacle (S104). According to the first method, when the recognition range _RA estimated by the recognition range estimation unit 2a does not include the direction of the obstacle estimated by the obstacle direction estimation unit 5, It is determined that the vehicle occupant does not recognize the obstacle. According to the second method, when the most appropriate driving operation for the obstacle is not performed by the driver of the vehicle, the recognition range estimation unit 2a or the recognition determination unit 6 It is determined that the obstacle is not recognized. If there is no obstacle, the ECU 50a ends the process (S103).

  When an occupant such as a vehicle driver does not recognize the obstacle (S105), the display type selection unit 8 of the ECU 50a is based on information such as the type of the obstacle identified by the obstacle identification unit 7. The type of display generated by the display generation unit 9a of the ECU 50a is selected (S106). The display generation unit 9a generates a display while changing the display content according to the display type selected by the display type selection unit 8 (S107). The HUD 10 projects the display generated by the display generation unit 9a onto the windshield of the vehicle (S108). If an occupant such as a vehicle driver recognizes the obstacle, the ECU 50a ends the process (S105).

  As shown in FIG. 4, in the present embodiment, the display generation unit 9 a projects a display BM composed of a plurality of moving points p onto the windshield W of the HUD 10. The size of the plurality of points p can be, for example, 1 to 10 times the minimum diameter estimated to be visible to a driver of a vehicle. For example, the moving direction and speed of each of the plurality of points p are different from each other. The number of the plurality of points p can be 5 to 25, for example.

  In the present embodiment, for example, biological motion can be applied to the display BM configured by a plurality of moving points p. Biological motion is a representation of living things with only a few movements. Biological motion strongly works on the sense that human beings recognize the existence of an object. Biological motion is composed of a small number of point movements, and therefore hardly retains the shape of an actual object, and does not hinder visibility even when displayed superimposed on the surrounding landscape.

  The display generation unit 9a can create a biological motion display BM in advance by motion capture or the like and record it until it is projected onto the HUD 10. The display generation unit 9 a may record the biological motion display BM created outside the vehicle display device 100 a until it is projected onto the HUD 10. For example, the biological motion display BM is created by recording the coordinate positions of each of a plurality of specific parts such as a joint of a living organism at an arbitrary discrete time, and the coordinate positions of each of the specific parts at a discrete time at a point p. It can be created by expressing. Biological motion display BM information can be expressed by time-series information of the coordinate positions of the specific parts. The coordinate system representing the display BM may be either a two-dimensional coordinate system or a three-dimensional coordinate system.

  The biological motion display BM may be created by manual input work from an image in which the movement of a living thing is recorded, or may be automatically created by image processing or the like. For example, when the obstacle detected by the obstacle detection unit 4 is a pedestrian and the display generation unit 9a immediately generates a display BM of the biological motion of the pedestrian, for example, a monocular camera of the outside sensor 3 By extracting the time series information of the coordinate positions of each joint of the pedestrian from the pedestrian image obtained by the above, the display generation unit 9a immediately generates the BM biological motion display BM. Can do.

  Biological motion display BM that can be selected by the display type selection unit 8 can be prepared in advance as many types as possible. For example, the display type selection unit 8 can freely combine the types of obstacles and the types of organisms in the biological motion display BM. The display type selection unit 8 may determine the biological type of the biological motion display BM to be selected at random. The combination of the type of the obstacle and the biological type of the biological motion display BM is determined in advance. In addition, the biological motion display BM organism type may be fixed to a specific organism.

  Since the human reaction to the movement of the living organism is a function provided so that it can quickly respond when a danger such as an external enemy approaches, the display type selection unit 8 has an instinct that is a threat to human beings such as snakes, spiders, You may preferentially select biological creatures such as leopard octopuses and monsters such as lions and their threats and actions such as running as the biological motion display BM. For example, in the example of FIG. 4, a biological motion display BM representing the movement of a snake by a point p with respect to an obstacle O that is another vehicle is displayed. When there are a plurality of obstacles, the display type selection unit 8 may select a biological motion display BM representing different types of organisms for each obstacle.

  In addition, the display type selection unit 8 may select a biological motion display BM that represents a living organism other than a human being. Since human movements such as pedestrians exist in many places outside the vehicle, it is easy to make occupants recognize obstacles by displaying a biological motion display BM that expresses organisms other than humans. Can do. In this case, the display type selection unit 8 may be configured such that the type of obstacle and the type of organism represented by the biological motion display BM are different from each other. The display type selection unit 8 may select the biological motion display BM only when the obstacle is a non-living object such as a vehicle, a motorcycle, a sign, or an intersection.

  The type of biological motion display BM that can be selected by the display type selection unit 8 will be further described. In order to alert the occupant to urgent attention, a biological motion display BM representing the above-mentioned poisonous creatures such as snakes, spiders and leopard octopuses and beasts such as lions is selected. By such an enemy display BM rooted in instinct, it is possible to change the sight line direction of the occupant and expect early recognition and reliable recognition of the occupant.

  On the other hand, a biological motion display BM that induces the occupant's feelings may be selected. For example, according to the display BM of biological motion that expresses a human fear or a surprised expression, it is possible to enhance the occupant's tension and to obtain the same effect as the above-described display BM of a snake or a spider. In addition, according to the biological motion display BM that expresses the expression of a human smile, for example, when an elderly person or a child is slowly crossing, the mental state of the occupant can be calmed. it can.

  Alternatively, a biological motion display BM that represents a human gaze may be selected in order to guide a place where the gaze should be directed to the occupant when there is a certain amount of time. Thereby, the direction of the line of sight of the occupant can be guided.

  According to the present embodiment, the display generation unit 9a generates a plurality of moving points p as a display BM projected onto the HUD 10. A location where a plurality of moving points p of the HUD 10 are projected is unlikely to be an obstacle when the outside of the vehicle is visually recognized through the location. Therefore, the visibility when the vehicle occupant visually recognizes the outside of the vehicle via the HUD 10 can be improved as compared with the case where the character is projected on the head-up display. In addition, the display generation unit 9a changes the content of the display BM composed of a plurality of moving points p in accordance with the content of information to be recognized by the vehicle occupant by the display. Compared with the case where it does, it becomes easier to grasp | ascertain the content of the information which a passenger | crew of a vehicle makes a passenger | crew of a vehicle recognize by display BM.

[Second Embodiment]
As shown in FIG. 5, the vehicle display device 100b according to the second embodiment is different from the first embodiment in that the ECU 50b includes a recognition range estimation unit 2b and a display generation unit 9b. This is the same as in the first embodiment.

The recognition range estimation unit 2b estimates a central visual field and a peripheral visual field as the recognition range of an occupant such as a vehicle driver. As shown in FIG. 6, the recognition range estimation unit 2b estimates a range indicated by a solid angle of about 2 ° in the vicinity of the latest line-of-sight direction V _L as the central visual field V _C, and centers the latest line-of-sight direction V _L and certain ranges (for example 40 ° C., or horizontal 180 ° to 210 degree ° in direction) a, and a range excluding the central field V _C and peripheral vision V _P. Alternatively, cognitive range presumption unit 2b estimates the range indicated by the solid angle of about 2 ° in the vicinity of the latest visual line direction V _L and the central visual field V _C, which is estimated as with the other of the first embodiment cognitive range R _a may be estimated with the peripheral vision V _P. Further, the recognition range presumption unit 2b, cognitive range presumption unit 2b outputs information about the estimated central field V _C and peripheral vision V _P to the display generator unit 9b.

As shown in FIG. 7, the display generation unit 9b displays the display BM of Biological Motion outside the peripheral vision V _P of the central visual field V _C. As shown in FIG. 7, a position having the same direction as the direction d toward the viewing direction V _L to the obstacle O in the central field V _C is displayed BM of biological motion may be displayed.

Biological motion display BM has high human sensitivity in the peripheral visual field _VP , and can draw strong attention to humans even if it is not displayed ahead of the line-of-sight direction _VL . This is because it is a function that humans have as an instinct for living organisms so that they can respond quickly when the dangers of external enemies are imminent. In the present embodiment, by displaying the display BM of Biological Motion outside the peripheral vision V _P of the central visual field V _C, without interfering with central vision V _C of the occupant of the vehicle, thereby recognizing the obstacle O on the occupant be able to.

[Third Embodiment]
As shown in FIG. 8, the vehicular display device 100 c according to the third embodiment has an obstacle collision time detection unit 11, an obstacle risk degree estimation unit 12, and a display speed determination unit 13 in the ECU 50 c. Unlike the second embodiment, the rest is the same as the second embodiment.

  The obstacle collision time detection unit 11 receives a signal from the vehicle outside sensor 3 and detects a predicted time until the vehicle collides with the obstacle. The predicted time until the vehicle collides with the obstacle can be calculated from the distance from the obstacle and the relative speed.

  The obstacle risk level estimation unit 12 collides with the obstacle type detected by the obstacle identification unit 7 (a numerical value representing the size of the obstacle) and the obstacle detected by the obstacle collision time detection unit 11. The risk of the obstacle is estimated from at least one or both of the predicted times until the obstacle. The danger level of the obstacle is an index representing the danger given to the vehicle by the obstacle, and is represented by a numerical value. The risk level of the obstacle can be calculated by adding a value obtained by multiplying the type of the obstacle and the estimated time until the collision with the obstacle by the weighted evaluation index.

  The display speed determination unit 13 determines the movement speed of the point p of the display BM according to the obstacle risk estimated by the obstacle risk estimation unit 12. For example, the display speed determination unit 13 can increase the speed of movement of the point p of the display BM when the risk of the obstacle is equal to or higher than a predetermined threshold. Further, the display speed determination unit 13 may increase the movement speed of the point p of the display BM as the danger level of the obstacle increases.

  As shown in FIG. 9, the operation of the vehicular display device 100c executes the processes of S201 to S206 similar to S101 to S106 of the first embodiment shown in FIG. The obstacle collision time detection unit 11 of the ECU 50c detects a predicted time until the vehicle collides with the obstacle, and the obstacle risk estimation unit 12 estimates the risk of the obstacle. When the degree of risk is greater than or equal to the threshold (S207), the display speed determination unit 13 of the ECU 50c increases the movement speed of the point p on the display BM (S208). On the other hand, when the degree of risk is less than the threshold (S207), the display speed determination unit 13 determines the movement speed of the point p to be a normal speed.

  The display generation unit 9b generates a biological motion display BM according to the movement speed of the point p determined by the display speed determination unit 13 (S209). The HUD 10 projects the display BM generated by the display generation unit 9a on the windshield of the vehicle (S210).

  Biological motion display BM has the effect of synchronizing human movements. For example, when the speed of the point p of the biological motion display BM increases, the recognition, determination, and operation time for an obstacle of a human who viewed the display BM increases. Therefore, in the present embodiment, the higher the obstacle risk level, the faster the movement speed of the point p of the biological motion display BM, thereby speeding up the movement speed of a passenger such as a vehicle driver. can do. In the present embodiment, the speed of movement of the point p of the biological motion display BM may be changed according to the traveling environment in which the vehicle travels. For example, the speed of the point p can be increased at a traffic jam location such as a sag on an expressway, and the speed of the point p can be decreased on a school road.

  As mentioned above, although embodiment of this invention was described, this invention is implemented in various forms, without being limited to the said embodiment. For example, the content of the information recognized by the vehicle occupant by the display BM includes, for example, a passenger such as a driver of a vehicle including a signal, a sign, an unsightly intersection, etc. in addition to the type and risk of the obstacle in the above embodiment. This includes the location, status, etc. of all things that should be recognized.

DESCRIPTION OF SYMBOLS 1 ... Driver sensor, 2a, 2b ... Recognition range estimation part, 3 ... Outside sensor, 4 ... Obstacle detection part, 5 ... Obstacle direction estimation part, 6 ... Recognition judgment part, 7 ... Obstacle identification part, 8 ... Display Type selection unit, 9a, 9b ... display generation unit, 10 ... HUD, 11 ... obstacle collision time detection unit, 12 ... obstacle risk level estimation unit, 13 ... display speed determination unit, 50a, 50b, 50c ... ECU, 100a , 100b, 100c ... display device for vehicle, V _L ... direction of sight, R _I ... instantaneous recognition range, R _A ... recognition range, V _C ... central vision, V _P ... peripheral vision, p ... point, BM ... display, O ... obstacles, d ... direction.

Claims (1)

A vehicle display device for causing a vehicle occupant to visually recognize a display projected on a head-up display mounted on a vehicle,
A display generation unit configured to generate the display while changing the content of the display projected on the head-up display as a plurality of moving points according to the content of information to be recognized by an occupant of the vehicle by the display; Vehicle display device.

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