JP7563293B2 - Vehicle display device - Google Patents

Description

This disclosure relates to a display device for a vehicle.

Conventionally, the technology described in Patent Document 1 is known as a vehicle display device. Specifically, the vehicle display device (motion sickness prevention and recovery device) described in Patent Document 1 is configured to include an acceleration sensor, an information processing device, and a display, and it is disclosed that the information processing device generates a moving image based on the acceleration input from the acceleration sensor and outputs information about the moving image to the display. The display is realized by a liquid crystal display, and is provided in front of the occupant (passenger) when seated in the seat, with the display portion facing the occupant's face. It is said that such technology can adequately prevent motion sickness or recover from motion sickness without causing drowsiness, etc.

Patent No. 4892731

However, in the configuration disclosed in Patent Document 1, the input of acceleration alone does not necessarily produce a moving image that is effective for each occupant. Also, if the display position is fixed, it becomes difficult to display a moving image that corresponds to the occupant's posture, line of sight, etc. Furthermore, if the display portion is arranged to face the occupant's face, there is a risk that if the occupant is operating a mobile phone, personal computer, or reading, the moving image will be displayed near the occupant's line of sight, which may make it difficult to suppress motion sickness.

This disclosure is a technology that was developed based on the above circumstances, and aims to provide a vehicle display device that can effectively suppress motion sickness for each passenger.

The present disclosure relates to a vehicle display device that displays an image on a vehicle interior material installed in the interior of a vehicle, and is characterized by comprising an acquisition means for acquiring occupant information related to an occupant, a generation means for generating a changed image by changing components of a pre-stored image based on the occupant information, and a display means for displaying the changed image by projecting it onto the vehicle interior material.

With such a vehicle display device, a changing image in which the components of the image are changed based on occupant information can be displayed on the vehicle interior material, making it possible to display a changing image that differs depending on the state and characteristics of each occupant. In addition, since the changing image is displayed by projecting it onto the vehicle interior material, the changing image can be adjusted to any part or range of the vehicle interior material and projected. Note that components of the image include the speed at which the figures, symbols, etc. (hereinafter referred to as figures, etc.) projected as the image move, the size, color, transparency, etc. of the figures, etc.

In the above configuration, the vehicle display device may include a dividing means for dividing the vehicle interior material into a central visual field portion located in the central visual field of the occupant and a peripheral visual field portion located in the peripheral visual field, which is the area around the central visual field, and the display means may display the changing image in the peripheral visual field portion.

This type of vehicle display device can display a changing image in the peripheral vision area (peripheral vision) that avoids the area that can be seen with relatively high visual acuity (central vision). For example, even if a passenger is operating a mobile phone or personal computer, reading, etc., a changing image can be displayed in an area that avoids the central vision, which includes most of these areas, thereby suppressing motion sickness.

In the above configuration, the acquisition means may acquire the line of sight of the occupant as the occupant information, and the division means may divide the central vision area and the peripheral vision area based on the line of sight. With such a vehicle display device, even if the line of sight of the occupant moves, the vehicle interior material can be divided into the central vision area and the peripheral vision area with high accuracy in accordance with the line of sight.

In the above configuration, the acquisition means may acquire the speed of the vehicle as vehicle information related to the vehicle, and the generation means may generate the changed image by changing the speed of the components of the pre-stored image based on the vehicle speed acquired by the acquisition means. Such a vehicle display device makes it easier for occupants to intuitively recognize the vehicle speed, thereby suppressing motion sickness.

In the above configuration, the acquisition means may acquire the orientation of the occupant as the occupant information, and the display means may change the position at which the changing image is displayed based on the orientation of the occupant. With such a vehicle display device, the changing image can be suitably displayed even for vehicle interior materials that are included in the field of view of an occupant who is riding facing backwards through a child seat, for example.

This disclosure makes it possible to provide a vehicle display device that can effectively reduce motion sickness for each occupant.

FIG. 1 is a diagram showing the interior of a vehicle according to a first embodiment, viewed from the left side. Rear view of the interior of a car A block diagram showing an electrical configuration of a display device. A flow chart showing the process of displaying a changing image on a display device. Diagram showing the change image FIG. 13 is a view of the interior of a vehicle according to a second embodiment from the left side.

<Embodiment 1>
A first embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 5. In this embodiment, a display device (vehicle display device) 100 (see Fig. 3) mounted on an automobile (vehicle) 1 as a vehicle will be described.

As shown in FIG. 1 and FIG. 2, the interior of the automobile 1 includes a driver's seat 10 where the driver sits, a passenger seat 15 located to the left of the driver's seat 10, and a rear seat 20 located behind the driver's seat 10. An occupant H1 sits in the rear seat 20. The interior of the automobile 1 also includes a roof trim 30 that constitutes the ceiling, a door trim 40 attached to the inside of a door panel (not shown), a pillar garnish 50 that supports the roof trim 30 and is shaped like a column that extends vertically, a carpet 54 that constitutes the floor surface under the feet of the occupant H1, and a console box 58 that serves as a storage box and is provided between the driver's seat 10 and the passenger seat 15. The driver's seat 10, the passenger seat 15, the rear seat 20, the roof trim 30, the door trim 40, the pillar garnish 50, the carpet 54, and the console box 58 are interior materials (vehicle interior materials) 2 provided in the interior of the automobile 1.

A camera 61 and a projector 91 are provided slightly behind the center of the roof trim 30. A projector 92 is provided on the front upper side of the door trim 40. A sensor 65 is provided on the seat back of the driver's seat 10. A sensor 66 is provided on the seat cushion of the rear seat 20. The camera 61 captures images of the interior of the vehicle, thereby acquiring occupant information such as the posture, facial expression, line of sight, riding position, and riding direction of the occupant H1. The sensor 65 can detect the temperature, humidity, and the like in the vehicle interior (vehicle information described below). The sensor 65 can also detect the carbon dioxide concentration in the breath of the occupant H1 (occupant information). The sensor 66 can acquire occupant information such as the body temperature, blood pressure, and the like of the occupant H1.

The projectors (display units) 91 and 92 can project a changing image, which will be described later, onto the interior material 2. The projector 91 can project a changing image mainly onto the roof trim 30, the pillar garnish 50, the driver's seat 10, and the console box 58. The projector 92 can project a changing image mainly onto the door trim 40 and the carpet 54. The projectors 91 and 92 may project a changing image complementary to each other onto each interior material 2. For example, the projector 91 mainly projects a changing image onto the driver's seat 10, but the projector 92 may project a part of the changing image (a shape, part of a color, etc.) to complement this.

Figure 3 is a block diagram showing the electrical configuration of the display device 100. The display device 100 includes an occupant information acquisition means 60, a vehicle information acquisition means (vehicle information acquisition means) 70, a control unit 80 having a determination means 89, a classification means 81, and a generation means 85, and a display means 90. The two acquisition means 60, 70 and the display means 90 are electrically connected to the control unit 80. The occupant information acquisition means 60 includes a camera 61, sensors 65, 66, and a receiving unit 68, and acquires occupant information of the occupant H1. The receiving unit 68 is a part that receives occupant information such as the gender, age, hobbies, and preferences of the occupant H1. The occupant information received by the receiving unit 68 is information that is input by the occupant H1 from an information terminal such as a mobile phone (smartphone) using a specified application and is transmitted wirelessly from the information terminal.

The vehicle information acquisition means 70, a part of which is included in, for example, an ECU (not shown), acquires vehicle information (vehicle information) related to the automobile, such as the vehicle speed, acceleration, brake and accelerator input, and GPS (vehicle location information). In addition, a part of the vehicle information acquisition means 70 is a sensor provided on a panel (not shown) of the automobile 1, and acquires information related to the external environment, such as the outside air temperature and the carbon dioxide concentration in the outside air. The display means 90 includes projectors 91 and 92.

The determination means 89 determines whether the occupant is suffering from motion sickness and whether motion sickness suppression intervention is necessary based on the occupant information acquired by the occupant information acquisition means 60. The classification means 81 includes a definition section 82 and a classification section 83. As shown in Figures 1 and 2, the classification means 81 classifies the interior material 2 into a central vision section 2A and a peripheral vision section 2B based on the line of sight E (shown by a dashed line) acquired from the camera 61 and other occupant information, etc.

The defining portion 82 defines a position (indicated by a dashed line L1) that is spaced apart by a central visual field angle determined with respect to the line of sight E, and a position (indicated by a dashed line L2) that is spaced apart by a peripheral visual field angle determined with respect to the line of sight E. In FIG. 1, the central visual field angle in the vertical direction is indicated as θ _A , and the peripheral visual field angle in the vertical direction is indicated as θ _B. The defining portion 82 defines the area inside the dashed line L1 as the central visual field R1 of the occupant H1, and defines the area outside the dashed line L1 and inside the dashed line L2 (the area around the central visual field R1) as the peripheral visual field R2 of the occupant H1. The dividing portion 83 divides the part of the interior material 2 that is located in the central visual field R1 of the occupant H1 as the central visual field portion 2A, and divides the part that is located in the peripheral visual field R2 of the occupant H1 as the peripheral visual field portion 2B.

As shown in FIG. 3, the generating means 85 generates a changed image by changing the components of a pre-stored memorized image based on occupant information and vehicle information. The generating means 85 includes a memory unit 86 that stores multiple types of images as memorized images, a selection unit 87 that selects one image from the multiple memorized images as a selected image, and a change unit 88 that changes the components of the selected selected image. Types of memorized images in the memory unit 86 include, for example, light ray, bubble, and ripple-like images.

Figure 5 shows an example of a ray-like shadow image (changing image) V0. In this image V0, multiple rays of light C are flowing to the right. The rays of light C have a leading edge C1 that shines like a dot, and a tail C2 that extends along the trajectory of the leading edge C1 (to the left of the leading edge C1). When the image selected by the selection unit 87 is such a ray-like shadow image V0, the components of the selected image V0 refer to, for example, the speed at which the rays of light C flow to the right, the color of the rays of light C, the transparency of the rays of light C, the number of rays of light C per unit area, the size of the leading edge C1, the length of the tail C2, and the like. These components are stored in the memory unit 86 together with the shadow image. For example, when the light ray-like image V0 is selected as the selected image, the change unit 88 changes the above-mentioned components of the selected image V0 by accelerating or decelerating the speed at which the light rays C flow to the right, changing the color of the light rays C to a brighter color, increasing or decreasing the number of light rays C per unit volume, etc., to generate a changed image V. Then, the display means 90 displays the changed image V generated by the change unit 88 in the peripheral vision area 2B of the interior material 2.

Next, the flow of projecting a changing image onto the interior material 2 based on the occupant information of the occupant H1 will be explained mainly with reference to the flowchart shown in FIG. 4. First, the two acquisition means 60, 70 acquire occupant information and vehicle information (S1). In this embodiment, the occupant information acquisition means 60 acquires, as the occupant information of the occupant H1, information such as a 24-year-old male seated in the rear seat 20 located behind the driver's seat 10, his line of sight E looking at point E1 (see FIGS. 1 and 2) on the rear surface of the headrest of the driver's seat 10, his facial expression, and the carbon dioxide concentration in his breath. In addition, the vehicle information acquisition means 70 acquires, as the vehicle information, information such as the accelerator being pressed and the automobile 1 accelerating.

Next, the determination means 89 of the control unit 80 determines whether or not motion sickness suppression intervention is necessary (if the occupant H1 is motion sick) based on occupant information (e.g., the line of sight E of the occupant H1, facial expression, carbon dioxide concentration in the exhaled breath, etc.) (S2). If motion sickness intervention is necessary (YES in S2), proceed to S3, and if motion sickness intervention is not necessary (NO in S2), return to S1.

In S3, the central visual field R1 and the peripheral visual field R2 are defined by the defining unit 82 of the dividing means 81. Specifically, the defining unit 82 defines the central visual field angle _θA in the vertical direction as 40 degrees, the peripheral visual field angle _θB as 125 degrees, the central visual field angle (not shown) in the horizontal direction as 40 degrees, and the peripheral visual field angle (not shown) as 200 degrees based on the age of the occupant H1 (24 years old), and defines positions (positions shown by dashed lines L1 and L2 in Figs. 1 and 2) spaced by each angle from the line of sight E. The defining unit 82 defines the area inside the dashed line L1 as the central visual field R1 of the occupant H1, and defines the area outside the dashed line L1 and inside the two-dot dashed line L2 as the peripheral visual field R2 of the occupant H1.

The defining unit 82 may define each of the above-mentioned viewing angles to be smaller than each of the above-mentioned values (reference values) as the age of the occupant increases from a predetermined age (e.g., age 20). For example, when the age of the occupant is 60 years old, the defining unit 82 may define the central viewing angle θ _A in the vertical direction to be 30 degrees, the peripheral viewing angle θ _B to be 100 degrees, the central viewing angle (not shown) in the horizontal direction to be 30 degrees, and the peripheral viewing angle (not shown) to be 150 degrees.

Next, the dividing section 83 divides the part of the interior material 2 located in the central visual field R1 of the occupant H1 as the central visual field 2A, and divides the part located in the peripheral visual field R2 of the occupant H1 as the peripheral visual field 2B (S4). Specifically, as shown in FIG. 1 and FIG. 2, the dividing section 83 divides the pillar garnish 50, a part 30A of the roof trim 30 located in front of the driver's seat 10, the upper part 10A of the headrest and the seat back of the driver's seat 10, and the upper front end part 40A of the door trim 40 as the central visual field 2A. The dividing section 83 also divides the part 30B of the roof trim 30 located slightly rearward from above the driver's seat 10, the lower part 10B of the seat back of the driver's seat 10, the majority 40B of the door trim 40 including the inside handle and armrest, the carpet 54, and the console box 58 as the peripheral visual field 2B.

Next, in the generating means 85, the selection unit 87 selects one image as the selected image V0 from the multiple types of stored images stored in the memory unit 86 (S5). The selection unit 87 selects the ray-like image V0 as the selected image from the multiple types of stored images based on the occupant information of the occupant H1 (for example, information that the occupant is a 24-year-old male).

Then, the change unit 88 generates a changed image V by changing the components of the selected image V0 based on the occupant information and vehicle information acquired by the two acquisition means 60, 70 (S6). Specifically, as shown in FIG. 5, the change unit 88 changes the speed at which the light beam C flows in the selected image V0 to 1.2 times the vehicle speed, and changes the color of the light beam C to a warm color in accordance with the decrease in the body temperature of the occupant H1 (or a cool color in accordance with the increase in body temperature). In addition, when the expression or posture of the occupant H1 is tense, the change unit 88 changes the transparency of the light beam C to be lighter, the front part C1 to be larger, and the tail part C2 to be longer relative to a predetermined value, and when the expression or posture of the occupant H1 is relaxed, the change unit 88 changes the transparency of the light beam C to be darker, the front part C1 to be smaller, and the tail part C2 to be shorter relative to a predetermined value. The change unit 88 changes the components of the selected image through such processing to generate a changed image V.

Next, the display means 90 projects and displays the changing image from the display means 90 onto the peripheral vision area 2B (S7). Specifically, the projector 91 mainly projects the changing image V onto a portion 30B of the roof trim 30, the lower portion 10B of the driver's seat 10, and the console box 58, and the projector 92 mainly projects the changing image V onto a majority 40B of the door trim 40 and the carpet 54. The display means 90 does not project the changing image V onto the central vision area 2A and the area R3 located outside the peripheral vision area R2 in the interior material 2.

Then, the occupant information acquisition means 60 acquires occupant information again (S8), and the determination means 89 determines whether or not the occupant H1 is motion sick (S9). If the occupant H1 is motion sick (YES in S9), the display device 100 returns to S3, and if the occupant H1 is not motion sick (NO in S9), the display device 100 ends the above series of processes. The display device 100 then starts the process again from S1.

Next, the effects of this embodiment will be described. In this embodiment, a display device 100 is shown that displays an image on an interior material 2 provided in the interior of an automobile 1, and that includes an occupant information acquisition means 60 that acquires occupant information related to an occupant H1, a generation means 85 that changes components of a pre-stored image based on the occupant information to generate a changed image V, and a display means 90 that displays the changed image V by projecting it onto the interior material 2.

With such a display device 100, a changed image V can be displayed on the interior material 2 by changing the components of a pre-stored image based on occupant information, making it possible to display a different changed image V depending on the state and characteristics of each occupant. In addition, since the changed image V is displayed by projecting it onto the interior material 2, the changed image V can be adjusted to any part, any range, etc., of the interior material 2 and projected.

The display device 100 includes a dividing means 81 that divides the interior material 2 into a central visual field 2A located in the central visual field R1 of the occupant H1 and a peripheral visual field 2B located in the peripheral visual field R2, which is the area around the central visual field R1, and the display means 90 displays the changing image V in the peripheral visual field 2B.

With this type of display device 100, the changing image V can be displayed in the peripheral vision portion 2B, which is located in an area (peripheral vision R2) that avoids the area visible with relatively high visual acuity (central vision R1). For example, even if the occupant H1 is operating a mobile phone or personal computer, reading, etc., the changing image V can be displayed in an area that avoids the central vision R1, which includes most of these areas, thereby suppressing motion sickness.

The occupant information acquisition means 60 acquires the line of sight E of the occupant H1 as occupant information, and the division means 81 divides the central visual field 2A and the peripheral visual field 2B based on the line of sight E. With this type of display device 100, even if the line of sight E of the occupant H1 moves, the interior material 2 can be divided with high precision into the central visual field 2A and the peripheral visual field 2B in accordance with the line of sight E.

The display device 100 includes a vehicle information acquisition means 70 that acquires the speed of the automobile 1 as vehicle information related to the automobile 1, and the generation means 85 changes the speed, one of the components of the stored image, based on the speed of the automobile 1 acquired by the vehicle information acquisition means 70 to generate a changed image V. Such a display device 100 makes it easier for the occupant H1 to intuitively recognize the speed of the automobile 1, thereby suppressing motion sickness.

<Embodiment 2>
Next, a second embodiment of the present disclosure will be described with reference to Fig. 6. In this embodiment, the same components as those in the above embodiment are designated by the same reference numerals, and redundant descriptions of the structure, operation, and effects will be omitted.

An occupant H2 is seated in a child seat 21 attached facing backward in the rear seat 20 located behind the driver's seat 10. In the display device 100 (see FIG. 3), the camera 61 of the occupant information acquisition means 60 acquires occupant information such as the line of sight E200 of the occupant H2 and the direction in which the occupant rides (facing backward). In the display device 100, the definition unit 82 of the division means 81 defines a central visual field angle _θA and a peripheral visual field angle _θB based on the age of the occupant H2 (under 1 year old), and defines positions (positions indicated by dashed lines L201 and L202) that are open by each angle with respect to the line of sight E200. The definition unit 82 defines the area inside the dashed line L201 as the central visual field R201 of the occupant H2, and defines the area outside the dashed line L201 and inside the two-dot dashed line L202 as the peripheral visual field R202 of the occupant H2. In addition, the sorting means 81 selects the roof trim 30, the pillar garnish 250, the rear seat 20, and the door trim 40 from among the interior materials 2 based on the orientation (rearward) of the occupant H2 when seated in the vehicle.

The dividing unit 83 divides the part of the selected interior material 2 located in the central visual field R201 of the occupant H2 as the central visual field 202A, and divides the part located in the peripheral visual field R202 of the occupant H2 as the peripheral visual field 202B. Specifically, the dividing unit 83 divides the part 230A of the roof trim 30 extending from directly above the rear seat 20 toward the rear, the pillar garnish 250, the upper part 220A of the headrest and the seat back of the rear seat 20, and the upper end (near the upper board) 240A of the door trim 40, etc., as the central visual field 202A. The dividing unit 83 also divides the part 230B of the roof trim 30 slightly forward of directly above the rear seat 20, the lower part 220B of the seat back of the rear seat 20, and the lower rear part 240B of the door trim 40, etc., as the peripheral visual field 202B.

The change section 88 of the generating means 85 generates a changed image V, which is an image in which the color of the light C in the selected image V0 (see FIG. 5) is changed to a primary color based on the age of the occupant H2 (for example, when the age is under 6 years old). The display means 90 displays the changed image V by projecting it onto the peripheral vision section 202B. Note that the display means 90 does not project the changed image V onto parts of the interior material 2 that were not selected based on the orientation of the occupant H2 (driver's seat 10, carpet 54) or onto the central vision section 202A.

<Other embodiments>
The present disclosure is not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included within the technical scope of the present disclosure. Furthermore, in addition to the embodiments described below, various modifications can be made without departing from the spirit of the present disclosure.

(1) In the above embodiment, the display means projects the changing image onto the projection target (interior material) from the front side, but this is not limited to this. For example, the display means may project the changing image transparently from the inside of the interior material to the outside (surface). For example, if an occupant is sitting facing forward in the back seat, a projector embedded inside the headrest of the driver's seat may project the changing image transparently to the rear.

(2) In the above embodiment, the dividing means divides the interior material into a central visual field and a peripheral visual field before generating the changing image, but this is not limited to the above. For example, the dividing means may divide the interior material into a central visual field and a peripheral visual field after generating the changing image. Also, the display means may project the changing image toward the peripheral visual field defined by the defining unit, without the dividing unit dividing the interior material into a central visual field and a peripheral visual field.

(3) The vehicle display device exemplified in the above embodiment is not limited to use in vehicles, and may be provided in various vehicles. For example, the vehicle display device can be applied to vehicles such as trains and recreational vehicles as ground vehicles, airplanes and helicopters as flying vehicles, and ships and submarines as marine and underwater vehicles.

1...Automobile (vehicle), 2...Interior material (vehicle interior material), 2A, 202A...Central vision section, 2B, 202B...Peripheral vision section, 60...Occupant information acquisition means (acquisition means), 70...Vehicle information acquisition means (acquisition means), 81...Dividing means, 85...Generation means, 90...Display means, 100...Display device (vehicle display device), E, E200...Gaze line, H1, H2...Occupant, R1, R201...Central vision, R2, R202...Peripheral vision

Claims (3)

A vehicle display device that displays an image on a vehicle interior material provided in a vehicle interior, comprising:
An acquisition means for acquiring occupant information relating to an occupant;
a generating means for generating a modified image by changing components of a pre-stored image based on the occupant information;
a display means for displaying the changing image by projecting it onto the vehicle interior material ,
The acquisition means acquires a line of sight of the occupant as the occupant information,
The vehicle display device includes a division means for dividing the vehicle interior material into a central visual field portion located in the central visual field of the occupant and a peripheral visual field portion located in the peripheral visual field, which is a region around the central visual field, based on the line of sight of the occupant,
A display device for a vehicle, characterized in that the display means projects the changing image onto the peripheral visual field and does not project it onto any part located outside the central visual field and the peripheral visual field . The acquisition means acquires a speed of the vehicle as the vehicle information related to the vehicle,
The vehicle display device according to claim 1, characterized in that the generating means generates the changed image by changing the speed of the components of the pre-stored image based on the speed of the vehicle acquired by the acquiring means. The acquisition means acquires, as the occupant information, a direction in which the occupant is riding,
3. The display device for a vehicle according to claim 1, wherein the display means changes a position at which the changing image is displayed based on the orientation of the occupant when riding in the vehicle.

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