WO2018047745A1

WO2018047745A1 - Image display system

Info

Publication number: WO2018047745A1
Application number: PCT/JP2017/031653
Authority: WO
Inventors: 浜野　正孝
Original assignee: 株式会社村上開明堂
Priority date: 2016-09-07
Filing date: 2017-09-01
Publication date: 2018-03-15
Also published as: JPWO2018047745A1; CN109689433A

Abstract

Provided is an image display system that enables an image to be easily modified and that enables the image to be made visible in a favorable manner. This image display system (1A) is provided with a display device (30) that is disposed in a vehicle (C) and displays an image (3), and an optical image-forming member (40) that is disposed in the vehicle (C) so as to be separated from the display device (30). The optical image-forming member (40) is characterized in that the image (3) displayed on the display device (30) is formed in midair behind the vehicle (C).

Description

Image display system

The present invention relates to an image display system.

In Patent Document 1, a hologram is provided on the rear surface of the vehicle, and when the subsequent vehicle enters a range of a specific inter-vehicle distance, the content recorded in advance on the hologram is displayed in a three-dimensional manner on the hologram surface, thereby The technology to alert the driver is described. Patent Document 1 also describes that the operation result (caution information) of the brake pedal is turned on or off by interlocking the brake pedal with the hologram.

JP-A-6-12599

In the technique described in Patent Document 1, the contents that can be displayed as caution information are limited to the contents stored in advance in the hologram. Further, since the caution information is three-dimensionally displayed by the hologram, there is a problem that an area that can be visually recognized by the following vehicle is narrow.
Further, since the caution information by the hologram is displayed on the optical element provided on the rear surface of the vehicle, the visibility of the caution information may be deteriorated when the optical element is scratched or dirty (such as dust). .

The present invention has been made in view of the above points, and it is an object of the present invention to provide an image display system capable of easily changing an image and appropriately viewing the image. And

In order to solve the above-described problems, an image display system of the present invention includes a display device that is provided in a vehicle and displays an image, and an optical imaging member that is provided in the vehicle apart from the display device. ing. The optical imaging member forms the image displayed on the display device in the air behind the vehicle.

According to the present invention, the image can be easily changed, and the image can be suitably viewed.

1 is a side view schematically showing a vehicle to which an image display system according to a first embodiment of the present invention is applied. 1 is a rear view schematically showing a vehicle to which an image display system according to a first embodiment of the present invention is applied. 1 is a block diagram showing an image display system according to an embodiment of the present invention. It is a side view which shows typically the vehicle to which the image display system which concerns on 2nd embodiment of this invention was applied. It is a side view which shows typically the vehicle to which the image display system which concerns on 3rd embodiment of this invention was applied.

Embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

<First embodiment>
As shown in FIGS. 1 and 2, an image display system 1A according to the first embodiment of the present invention is provided in a vehicle C and displays an image 3 behind the vehicle C, and the displayed image 3 follows. This is a system that is visually recognized by the driver D of the vehicle CX. As shown in FIG. 3, an image display system 1A according to the first embodiment of the present invention includes a brake pedal sensor 11, a raindrop sensor 12, a control device 20, a pair of left and right display devices 30, and a pair of left and right displays. An optical imaging member 40 (see FIG. 1).

<Container>
As shown in FIG. 1, the display device 30 and the optical imaging member 40 are accommodated in a pair of left and right accommodating portions 2 formed at the rear portion of the vehicle C. The accommodating part 2 is comprised by the recessed part 2a formed in the right-and-left end part of the vehicle body rear part, and the transparent resin translucent window 2b which covers the rear part opening of the said recessed part 2a.

<Brake pedal sensor>
As shown in FIG. 3, the brake pedal sensor 11 detects the depression (stroke) of the brake pedal (not shown) by the driver of the vehicle C, and outputs the detection result to the control device 20.

<Raindrop sensor>
The raindrop sensor 12 is provided on the surface of a windshield (not shown) of the vehicle C, and detects raindrops in the rain and outputs the detection result to the control device 20.

<Control device>
The control device 20 includes a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random Access Memory), an input / output circuit, and the like. The control device 20 may be an ECU (Electrical Control Unit) of the vehicle C, or may be provided integrally with the display device 30. The control device 20 acquires the detection result of the brake pedal sensor 11 and the detection result of the raindrop sensor 12, and controls the display device 30 based on the acquired detection result of the brake pedal sensor 11 and the detection result of the raindrop sensor 12. . In the present embodiment, the control device 20 outputs a control signal corresponding to the detection result of the raindrop sensor 12 to the display device 30 when the brake pedal sensor 11 is depressed.

<Display device>
The display device 30 is a monitor (for example, a backlight monitor) that acquires a control signal from the control device 20 and displays an image based on the acquired control signal. In the present embodiment, the display device 30 displays the type of image 3 corresponding to the detection result of the raindrop sensor 12 when the brake pedal sensor 11 is depressed. More specifically, when the detection result of the raindrop sensor 12 indicates non-rainy weather (fine weather or cloudy weather) (including the case where the detection result of the raindrop sensor 12 is not input to the control device 20), the display device 30 is The “!” Mark 3a shown on the left in FIG. 2 is displayed. When the detection result of the raindrop sensor 12 indicates rainy weather (including snowfall), the display device 30 displays a “!!!!” mark 3b shown on the right in FIG. Note that the image 3 of the display device 30 is not limited to “!”, And may be a character, a picture, or the like. That is, the image 3 of the display device 30 can be set as appropriate according to the application of the image display system 1A.

<Optical imaging member>
As shown in FIG. 1, the optical imaging member 40 is disposed apart from the display device 30, and the image 3 displayed on the display device 30 is displayed behind the vehicle C through the light transmission window 2 b. It is a plate-shaped member to be imaged. As the optical imaging member 40, an AI (Aerial Imaging) plate (manufactured by Ascarnet Co., Ltd .: Japanese Patent No. 4865088) can be suitably used. The optical imaging member 40 displays the image 3 displayed on the display device 30 disposed at the distance L1 on one surface side of the optical imaging member 40, and the distance L1 on the other surface side of the optical imaging member 40. The image is formed at the same size as that displayed on the display device 30. The postures (installation angles) of the display device 30 and the optical imaging member 40 are set so that the imaged image 3 can be suitably viewed by the driver D of the subsequent vehicle CX. For example, the formed image 3 is displayed on a virtual plane orthogonal to the front-rear direction of the vehicle C.

In the image display system 1A according to the first embodiment of the present invention, the image 3 displayed on the display device 30 is imaged by the optical imaging member 40 in the air behind the rear end of the vehicle body of the vehicle C. Therefore, the image display system 1A suitably changes the image 3 to be visually recognized by the driver D of the following vehicle CX (in this embodiment, according to the detection result of the brake pedal sensor 11 and the detection result of the raindrop sensor 12). be able to. Further, since the image display system 1A forms an image 3 (caution information) behind the rear end of the vehicle C (on the subsequent vehicle CX side), the image 3 is suitably viewed by the driver D of the subsequent vehicle CX. It is possible to prompt the driver D of the following vehicle CX to be alerted early. Further, the image display system 1A can cause the driver D of the succeeding vehicle CX to visually recognize the image 3 (caution image) in a wider range of the inter-vehicle distance compared to the case where the hologram is used. Further, in the image display system 1A, since the optical imaging member 40 is accommodated in the accommodating portion 2, the optical imaging member 40 is protected and foreign matter (dust or the like) adheres to the optical imaging member 40. Scratches can be prevented from occurring.

<Second Embodiment>
Next, an image display system according to the second embodiment of the present invention will be described focusing on differences from the image display system 1A according to the first embodiment. As shown in FIG. 4, the image display system 1B according to the second embodiment of the present invention further includes a pair of left and right optical systems 50B housed in the housing portion 2 (see FIG. 1).

<Optical system>
The optical system 50 </ b> B is a member that changes the distance of the path through which the light constituting the image 3 displayed on the display device 30 passes before reaching the optical imaging member 40. In the present embodiment, the optical system 50B is a path through which light constituting the image 3 displayed on the display device 30 passes before reaching the optical imaging member 40, as compared to the case where the optical system 50B is not provided. It is configured to extend the distance.

In the present embodiment, the optical system 50B is a plane mirror (reflecting member) provided between the display device 30 and the optical imaging member 40. Further, the postures (installation angles) of the display device 30, the optical system 50B, and the optical imaging member 40 are set so that the imaged image 3 can be suitably viewed by the driver D of the following vehicle CX.

The image 3 displayed on the display device 30 is input to the optical imaging member 40 via the optical system 50B, and is imaged behind the vehicle C. In the present embodiment, the distance L4 from the optical imaging member 40 to the imaged image 3 is the distance L2 between the display device 30 and the optical system 50B, and the distance L3 between the optical system 50B and the optical imaging member 40. (L4 = L2 + L3). Here, the distance L2 + L3 is a distance from the display device 30 to the optical imaging member 40 via the reflecting member (plane mirror) of the optical system 50B. Further, the distance L2 + L3 from the display device 30 to the optical imaging member 40 via the optical system 50B is larger than the linear distance between the display device 30 and the optical imaging member 40. Further, the size of the image 3 to be formed is equal to the size of the image 3 displayed on the display device 30. In the present embodiment, the optical system 50B is configured by a single reflecting member (a plane mirror), but the optical system 50B may be configured to include a plurality of reflecting members (such as a plane mirror). In this case, the light constituting the image 3 displayed on the display device 30 is sequentially reflected by the plurality of reflecting members and input to the optical imaging member 40.

The image display system 1B according to the second embodiment of the present invention can suitably set the position where the image 3 is imaged by the optical system 50B. Therefore, the image display system 1B can form and display the image 3 at a suitable distance with respect to the driver D of the following vehicle CX.

<Third embodiment>
Next, an image display system according to a third embodiment of the present invention will be described focusing on differences from the image display system 1B according to the second embodiment. As shown in FIG. 5, an image display system 1 </ b> C according to the third embodiment of the present invention is a pair of left and right accommodated in the accommodating portion 2 (see FIG. 1) instead of the optical system 50 </ b> B (see FIG. 4). The optical system 50C is provided.

<Optical system>
The optical system 50 </ b> C is a member that changes the size of the image 3 displayed on the display device 30 and inputs it to the optical imaging member 40. In the present embodiment, the optical system 50C is configured to enlarge the image 3 input to the optical imaging member 40 as compared to the case where the optical system 50C is not provided.

In the present embodiment, the optical system 50C is a concave mirror (a reflecting member and a magnifying member) provided between the display device 30 and the optical imaging member 40. Further, the postures (installation angles) of the display device 30, the optical system 50C, and the optical imaging member 40 are set so that the imaged image 3 can be suitably viewed by the driver D of the following vehicle CX. Yes.

The image 3 displayed on the display device 30 is input to the optical imaging member 40 via the optical system 50C, and is imaged behind the vehicle C. In the present embodiment, the distance L4 from the optical imaging member 40 to the imaged image 3 is the distance L2 between the display device 30 and the optical system 50C, and the distance L3 between the optical system 50C and the optical imaging member 40. (L4 = L2 + L3). Further, the distance L2 + L3 from the display device 30 to the optical imaging member 40 via the optical system 50C is larger than the linear distance between the display device 30 and the optical imaging member 40. Further, the size of the image 3 to be formed is larger than the size of the image 3 displayed on the display device 30 because it is enlarged by the optical system 50C which is a concave mirror.

In the image display system 1C according to the third embodiment of the present invention, the position at which the image 3 is imaged can be suitably set and the size of the imaged image can be suitably set by the optical system 50C. it can. Therefore, the image display system 1C can image and display the image 3 at a suitable distance and size for the driver D of the following vehicle CX. Further, in the image display system 1C, the display device 30 can be downsized.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably. For example, in the third embodiment, the optical system 50C can be realized by a convex lens instead of a concave mirror. In the second and third embodiments, the

optical systems

50B and 50C may be configured by combining a plurality of lenses, mirrors, and the like. In particular, by providing a plurality of mirrors (reflective members) and the like in the optical system 50B, the distance L4 can be increased even if the accommodating portion 2 is a narrow space.

In the image display systems 1A to 1C of the present invention, the control device 20 includes a wheel speed sensor that detects the wheel speed of the vehicle C, a vehicle speed sensor that detects the vehicle speed of the vehicle C, and a turning angle that detects the turning angle of the vehicle C. The configuration may be such that the image 3 displayed on the display device 30 is changed based on the detection result of the steering angle sensor or the like.

Further, the image display system may include an operation unit that can be operated by the driver, and the control device may display an image corresponding to the operation result of the operation unit on the display device.

Further, the image display system may include a sensor that detects a distance between the following vehicle and an optical system having at least one of the functions of the

optical systems

50B and 50C, and an optical system driving unit. Here, the optical system driving unit drives the optical system under the control of the control device, and changes at least one of the size of the image to be formed and the distance from the optical imaging member. According to such a configuration, the larger the inter-vehicle distance with the following vehicle, the larger the image to be formed and / or the image can be formed at a position away from the optical imaging member. Therefore, the visibility by the driver of the following vehicle can be set appropriately.

On the other hand, the image display system of the present invention may be configured by a display device and an optical imaging device, omitting various sensors (the brake pedal sensor 11 and the raindrop sensor 12) and the control device 20.

The image display system of the present invention can also be applied to systems other than the system that displays the image 3 behind the vehicle C. For example, the image display system of the present invention is also applicable when displaying an image including map information in a car navigation system. As a display device in this case, for example, a tablet terminal device such as a smartphone can be used. In other words, the image display device in this case includes a tablet terminal device (display device) and an optical imaging member that forms an image displayed on the display device in the air.

In this case, the image displayed on the tablet terminal device provided on the dashboard or the like in the passenger compartment is imaged in, for example, a space diagonally forward (in the passenger compartment or outside the passenger compartment) of the driver. It is possible for the driver of the vehicle to make it visually visible.

Conventionally, a monitor or a tablet terminal device or the like is installed on a dashboard to display map information in a car navigation system. In such a method, the driver's visibility in front of the driver is monitored by the monitor or the tablet terminal device. May be disturbed. However, since the image display system of the present invention can image map information in a space, both the visibility in front of the driver and the visibility of map information can be achieved. The image to be displayed / imaged is not limited to the image of the tablet terminal device, but may be an image of a car navigation system built in the vehicle.

Also, as a reference form of the present invention, a display device can be realized by combining a light source and a cell image. The image display system of the present invention can be applied not only to a vehicle but also to a game machine, a poster, a guide board, various touch panels, and the like.

1A, 1B, 1C Image display system 11 Brake pedal sensor 12 Raindrop sensor 20 Control device 30 Display device 40 Optical imaging member 50B Optical system (reflection member)
50C optical system

Claims

A display device provided on the vehicle for displaying an image;
An optical imaging member provided in the vehicle apart from the display device;
With
The image display system, wherein the optical imaging member forms the image displayed on the display device in the air behind the vehicle.
One or more reflecting members provided between the display device and the optical imaging member are provided, and the image displayed on the display device is transferred to the optical imaging member via the one or more reflecting members. Equipped with an input optical system,
The distance from the said optical imaging member to the said image imaged is equal to the distance from the said display apparatus to the said optical imaging member through one or more said reflection members. Image display system.
An optical system that changes the size of the image displayed on the display device and inputs the image to the optical imaging member;
The image display system according to claim 1, wherein the optical imaging member forms the image having the same size as the image input to the optical imaging member.
A display device for displaying an image;
An optical imaging member that is spaced apart from the display device and forms the image displayed on the display device in the air;
One or more reflecting members provided between the display device and the optical imaging member are provided, and the image displayed on the display device is transferred to the optical imaging member via the one or more reflecting members. An input optical system;
With
The distance from the said optical image formation member to the said image imaged is equal to the distance from the said display apparatus to the said optical image formation member through one or more said reflection members. The image display system characterized by the above-mentioned.
A display device for displaying an image;
An optical imaging member that is spaced apart from the display device and forms the image displayed on the display device in the air;
An optical system that is provided between the display device and the optical imaging member and changes the size of the image displayed on the display device and inputs the image to the optical imaging member;
With
The image display system, wherein the optical imaging member forms the image having the same size as the image input to the optical imaging member.