JP2020086141A - Display device for vehicle - Google Patents

Abstract

To provide a display device for a vehicle which can exhibit a desirable display for a viewer and also solves cost problems.SOLUTION: The display device for a vehicle is arranged in the body of a vehicle 1 and includes display panels 2 (21 to 24) for displaying required images. The display panels 21 and 22 are formed of high-resolution panels 211 and 221 displaying high-resolution images and low-resolution panels 212 and 222 displaying low-resolution images. The display device displays images in the display region (the entire area of the display panels 21 and 22) including the low-resolution panels 212 and 222 when a viewer is far from the display device, and displays images in the display region in the high-resolution panels 211 and 221 when a viewer is near the display device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicular display device including a display panel provided in a vehicle such as an automobile.

A vehicle display device has been proposed which displays images such as patterns and characters on the body of an automobile in order to perform advertisement and publicity using a vehicle, for example, an automobile, or to secure driving safety of the automobile. .. For example, Patent Document 1 proposes a technique in which a projector (projector) is installed in a side mirror or a rear lamp of an automobile and an image is projected and displayed on the outer surface of a vehicle body panel of the automobile. Further, Patent Document 2 proposes a technique of disposing a display panel made of a transmissive organic EL display on a vehicle body panel or a window (window) of an automobile and displaying an image on the display panel.

JP, 2005-148678, A JP, 2016-65938, A

In an automatically controlled vehicle (hereinafter referred to as an autonomous vehicle) that has been proposed in recent years, it is possible to omit the windows and lighting devices that are usually provided on the vehicle body. It becomes possible to arrange a device, for example a display panel. As a result, it is possible to realize a vehicular display device in which almost the entire outer surface of the vehicle body of the self-driving vehicle is used as the display surface.

In such a vehicle display device, it is easy to control the display form of the image displayed on the display panel. It is possible to control the size of the image to be displayed. That is, the image is displayed in a large size for the viewer at a distant position so that the viewer's vehicle can easily view the image. Thus, considering displaying a large size image, it is sufficient to use a low-resolution display panel as the display panel, which is preferable in terms of cost.

On the other hand, when a viewer near the self-driving car visually recognizes an image, especially a character image, it is necessary to reduce the size to an appropriate size for easy viewing. To support this, it is necessary to use a high resolution display panel. However, disposing such a high-resolution display panel in a large area of the vehicle body of an autonomous vehicle causes a problem that the cost of the display device becomes high.

An object of the present invention is to provide a vehicular display device that solves the problem of cost while performing suitable display for the viewer.

The vehicle display device of the present invention includes a display panel that is disposed on the vehicle body of a vehicle and that displays a required image. The display panel has a low resolution panel that displays the image at a low resolution and a high resolution image. It is configured by a high resolution panel to be displayed, and an image displayed in a display area including at least the low resolution panel can be displayed in the display area of the high resolution panel.

In the display panel according to the present invention, the high resolution panel is arranged in a part of the display area, and the low resolution panel is arranged in the other area. Further, the image displayed over both the display areas of the low resolution panel and the high resolution panel can be reduced and displayed in the display area of the high resolution panel. Alternatively, the image displayed in the display area of the low resolution panel can be reduced and displayed in the display area of the high resolution panel.

According to the present invention, it is possible to provide a vehicular display device that can be configured at low cost while performing suitable display for a viewer.

1 is a schematic external view of an autonomous vehicle of Embodiment 1. FIG. The block block diagram of a display control means. FIG. 3 is an external perspective view and a partially enlarged view illustrating a display form 1 of the first embodiment. FIG. 3 is an external perspective view and a partially enlarged view illustrating a display form 2 of the first embodiment. FIG. 7 is an external perspective view illustrating a display form of a modified example of the first embodiment. FIG. 6 is an external perspective view illustrating a display form of the second embodiment.

(Embodiment 1)
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of an autonomous vehicle according to a first embodiment to which a vehicle display device of the present invention is applied. The self-driving vehicle 1 is configured as a four-wheeled vehicle having a low-floor box-shaped body body 10, and is automatically driven by automatic driving control. The vehicle body 10 is made of a rigid material, and the front, rear, left and right four side surfaces are made of a transparent material except for the pillars 11 provided at the four corners, or are opened so that the inside and the outside communicate with each other. Has been done. Note that the front and rear and the left and right are directions indicated by arrows in FIG. 1 for convenience.

A pair of slide doors 12 are arranged on the left side of the four side surfaces, and when they are slid, the inside of the vehicle body body 10, that is, the vehicle interior is opened to the outside so that passengers can get in or out of the vehicle or load or unload luggage. You can do it. It is preferable that these slide doors 12 are also formed of a transparent material, or are formed in a frame shape in which the inside and the outside communicate.

Display panels 2 (2F, 2B, 2L, 2R) are provided on the front and rear side surfaces of the vehicle body 10 and on the left and right side surfaces thereof. Particularly, the left side display panel 2L includes two display panels 21 and 22 arranged on each of the two slide doors 12 and two display panels 23 arranged on both side surfaces 13 sandwiching the slide door. It is composed of four display panels including 24.

The display panel 2 is composed of an LCD (liquid crystal) panel or an organic EL panel, although its structure and illustration thereof are omitted. The display panel 2 displays an arbitrary image and is visible from the outside of the autonomous vehicle 1. It is possible to Further, since the display panel 2 is in a transparent state when no image is displayed, it is possible to visually recognize the outside from the passenger compartment of the autonomous vehicle 1. The display panel 2 does not necessarily have to be transparent.

The four display panels 21 to 24 on the left side surface are constituted by display panels in which pixels are arranged at a predetermined density, but the two display panels 21 and 22 arranged on the slide door 12 are arranged. With respect to the above, the central region in the vertical direction is composed of display panels 211 and 221 in which pixels are relatively arranged in high density. Hereinafter, the display panel in which the pixels are arranged in a predetermined density is referred to as a low resolution panel, and the display panel in which the pixels are relatively densely arranged is referred to as a high resolution panel.

That is, in the display panels 21 and 22 of the two slide doors 12, a part of the central region in the up-and-down direction of the respective display regions is composed of the high resolution panels 211 and 221. The high resolution panels 211 and 221 are areas corresponding to an average human eye height position of about 0.7 to 1.7 m from the ground. Therefore, in the two display panels 21 and 22 of the slide door 12, the central area in the vertical direction is composed of the high resolution panels 211 and 221 and the upper and lower display areas sandwiching the central area in the vertical direction are the low resolution panels 212 and 222. It will be composed of.

A sensor 31 is arranged above the roof 14 of the vehicle body 10. The sensor 31 is composed of an image pickup camera having an image pickup device such as CCD or MOS or a LiDAR (light detection and ranging), and is a viewer, that is, a pedestrian existing around the autonomous driving vehicle 1, particularly in the left side area. It is possible to detect humans such as.

FIG. 2 is a block diagram of the display control means 3 for controlling the display panel 2. The display control unit 3 includes a viewer detection unit 32 and an image control unit 33 in addition to the sensor 31. The viewer detection unit 32 detects a viewer who visually recognizes the display panel 2 of the autonomous vehicle 1, particularly the display panel 2L on the left side, based on the output of the sensor 31. The sensor 31 and the viewer detecting section 32 constitute a viewer detecting means. The viewer detection unit 32 further detects the detected position information of the viewer, particularly whether the viewer is near the left side surface of the self-driving vehicle 1 or at a distant position farther than this.

When detecting this position information, for example, the distance between the self-driving vehicle and the viewer is detected, and it is determined whether or not this distance is greater than a predetermined reference distance to detect whether it is far or near. Alternatively, the simply detected distance may be detected as the position information.

The image control unit 33 controls the display form of the image displayed on the display panel 2 based on the position information of the viewer detected by the viewer detection unit 32. A communication device 34 wirelessly connected to a base station, another vehicle, the Internet, etc. is connected to the image control unit 33, and data relating to a display image is input via the communication device 34, and the input data is A corresponding image can be displayed on the display panel 2. An input unit 35 is connected to the image control unit 33, and an image corresponding to the data input by the occupant of the autonomous vehicle at the input unit 35 can be displayed on the display panel 2.

Images displayed based on these data are advertising images for advertising, sign images such as road signs, character images such as messages for communication, and images such as symbols. The image may be either a still image or a moving image. Further, it may be a monochrome image or a color image.

In the self-driving vehicle 1 including the vehicle display device having this configuration, the image control unit 33 uses the input data to display the display panels 2 (2F, 2B) provided on the front, rear, left and right sides of the vehicle body 10. , 2L, 2R) display the desired image. Then, for the display panel 2L on the left side, the display form of the image is controlled based on the position information of the viewer detected by the viewer detection unit 32.

3 and 4 are schematic external views of the display control mode. The autonomous vehicle 1 is parked or stopped, and the viewer M is present on the left side of the autonomous vehicle 1. When the viewer detection unit 32 detects the viewer M, the distance Lx between the viewer M and the self-driving vehicle is detected, and this distance Lx is compared with the reference distance. When the distance is equal to or greater than the reference distance, it is determined that the vehicle is far away, and when the distance is shorter than the reference distance, it is determined that the vehicle is near.

The image control unit 33 displays a desired image on the display panel 2 according to the data from the communication device 34 or the input unit 35. As illustrated in FIG. 3A, when the viewer detection unit 32 determines that the viewer M is far away, the image control unit 33 causes the image to be displayed over the entire display area of the four display panels 21 to 24 on the left side surface. Is displayed. Here, four images of the image “ABCD” are displayed on the respective display panels 21 to 24, and further, the images are displayed as enlarged images as large as possible.

Looking at the display panel 22 of the rear slide door of the two slide doors 12, as shown in a partially enlarged view of FIG. 3B, the entire display area of the display panel 22, that is, the high resolution panel. The image “C” is enlarged and displayed over an area including the display areas of the low-resolution panel 221 and the low-resolution panel 222. Although the image resolution is low in the display area of the low-resolution panel 222, it is displayed as an enlarged large image, and since the viewer is viewing from a distant position, the low resolution does not pose a problem. Can be suitably visually confirmed and confirmed. Since the image resolution is high in the display area of the high resolution panel 221, the resolution never poses a problem. At this time, although not shown, the high resolution panel may also be displayed at the same resolution as that of the low resolution panel.

On the other hand, as shown in FIG. 4A, when the viewer detection unit 32 detects that the viewer M is approaching the left side surface of the self-driving vehicle 1, the image control unit 33 displays the displayed image “ABCD”. Is reduced and these images are displayed in the display areas of the high resolution panels 211 and 221 of the two display panels 21 and 22 of the slide door. Here, the image “AB” is displayed on the high resolution panel 211 of the front slide door, and the image “CD” is displayed on the high resolution panel 221 of the rear slide door.

Looking at the display panel 22 of the rear slide door, as shown in a partially enlarged view in FIG. 4B, no image is displayed in the display area of the low resolution panel 22, and high resolution is obtained. The image “CD” is reduced to fit in the display area of the panel 221, and is displayed in high definition. Since the high resolution panel 221 has a high image resolution, it can be displayed as a high definition image even if the image is reduced. Further, since the viewer M is approaching the self-driving vehicle 1 and the high-resolution panel 221 is located at the height of human eyes, the reduced image can be viewed appropriately.

At this time, the power supply is stopped so that the low-resolution panels 212 and 222 do not display images, so that power saving can be achieved. Further, when the display area of the high resolution panels 211 and 221 has a margin due to the reduction of the image, another image may be displayed, and the information to be displayed can be increased.

In addition, in FIG. 1, when a viewer gets in and out of the autonomous vehicle 1, the slide doors 12 are in an open state. If the display panels 23 and 24 are hidden by the slide door 12 when the slide door 12 is opened, the display panels 21 and 22 of the slide door 12 are arranged on the front side. Since it is located at, the viewer can visually recognize the high-definition images displayed on the high-resolution panels 211 and 221 when getting on and off.

As described above, even if most of the display areas of the display panels 21 and 22 are configured by the low-resolution panels 212 and 222, when the viewer is far from the autonomous vehicle 1, the images are enlarged on the display panels 21 and 22. By displaying the image, the viewer M can surely see the image, so that the resolution of the low resolution panels 212 and 222 does not matter. On the other hand, when the viewer is nearby, the image is reduced and displayed on the high-resolution panels 211 and 221 which are part of the display panels 21 and 22, so that the viewer M can reliably view the image. And a lot of information can be obtained. As a result, it is possible to suitably display the image on the display panel and reduce the cost.

When the image is enlarged and displayed, the display may be controlled so that the size of the image is continuously changed in accordance with the change in the distance between the autonomous vehicle and the viewer. That is, the image that has been enlarged and displayed may be gradually reduced as the viewer approaches, and the image may be displayed in the display area of the high-resolution panel when the distance becomes a predetermined distance or less.

Further, in the image display shown in FIGS. 3 and 4, when all the enlarged images cannot be displayed on the display panels 21 and 22 or the display panels 21 to 24 at the same time, or when all the reduced images are displayed at high resolution at the same time. When the images cannot be displayed on the panels 211, 221, the images may be displayed while scrolling on these display panels.

Although the above description is an example of the case where the viewer moves, the same display control can be realized even when the viewer is stationary and the autonomous vehicle 1 moves. For example, if an autonomous vehicle is applied to a passenger bus and the bus is traveling away from the stop, an image showing the destination of the bus throughout the display area of the display panel, including the low-resolution panel. Is displayed large so that passengers at the stop can see the image. When the bus stops at a stop, the image is displayed on the high-resolution panel, and other images, such as the name of the stop that will stop in the future, are displayed so that passengers can see these images clearly. Can be seen.

(Modification 1)
FIG. 5 is a schematic external view of the first modification of the first embodiment, in which parts equivalent to those in the first embodiment are designated by the same reference numerals. In this modified example 1, as shown in FIG. 5A, the two slide doors 12 and the four display panels 21 to 24 arranged on the left side surface 13 sandwiching the slide doors 12 are low resolution panels. However, the central regions in the vertical direction of these four display panels 21 to 24 are high resolution panels 211, 221, 231, 241 (hereinafter, referred to as 211 241).

Also in the modification 1, when the viewer is far away, as shown in FIG. 5A, the entire display area of the four display panels 21 to 24 on the left side surface, that is, the whole including the high resolution panels 211 to 241. The image "ABCD" is enlarged and displayed in the display area. When a viewer is near, the image "ABCD" is reduced and displayed in high definition on the high resolution panels 211 to 241 as shown in FIG. 5B. Adjacent viewers can view the reduced high-definition images displayed on the high-resolution panels 211 to 241. Note that the reduced image may be displayed only on one high resolution panel, for example, the high resolution panel 211.

In Modification 1, since the high-resolution panels 211 to 241 are arranged longer in the front-rear direction of the vehicle body of the autonomous vehicle 1 than in the first embodiment, a horizontally long image, for example, an image of a long character string is collectively displayed. Can be displayed. Further, in the modified example 1, the high resolution panels 211 to 241 are formed in a horizontally long shape, but by reducing the size in the vertical direction, the size of the entire high resolution panels 211 to 241 ( The area) can be suppressed to the same or smaller, and cost reduction can be realized.

(Embodiment 2)
FIG. 6 is a schematic external view of the second embodiment, and the portions equivalent to those of the first embodiment are designated by the same reference numerals. In the second embodiment, as shown in FIG. 6A, the present invention is applied to the display panel 2F on the front side surface of the autonomous vehicle 1. That is, in the display panel 2F on the front side, the high-resolution panel 251 is arranged in a part of the upper side of the display area, and the low-resolution panel 252 is arranged in the display area around the high-resolution panel 251. The display panel 25 is provided.

In the second embodiment, when the viewer is far away, the image is enlarged and displayed in the display area of the low resolution panel 252 of the front side display panel 25. Here, the image “ABCD” is enlarged and displayed on the low resolution panel 252 as much as possible. On the other hand, when the viewer is nearby, the image “ABCD” is reduced and displayed in the display area of the high resolution panel 251, as shown in FIG. 6B.

For example, as illustrated in the first embodiment, when the bus including the autonomous vehicle 1 is traveling at a position away from the stop, a large image of the destination of the bus is displayed on the entire surface of the low resolution panel 252, Make the image visible to passengers at the stop. When the bus approaches the stop, the image is reduced and displayed on the high resolution panel 251 in high definition. In addition, other information, for example, a bus number and the like are combined and displayed in high definition. Passengers can obtain information related to the bus by visually observing the high-definition image displayed on the high-resolution panel 251. As a result, the viewer can reliably view the displayed image regardless of the difference in the distance between the self-driving car and the viewer. At the same time, information on the cost of the display panel 2F on the front side can be suppressed.

Although not shown, the second embodiment may be applied to the display panel 2B on the rear surface of the autonomous vehicle 1. In this case, the image is enlarged and displayed in the entire display area of the display panel 2B on the rear side when the following vehicle exists in the distance while the autonomous vehicle is traveling. When a following vehicle approaches, a high resolution panel provided on a part of the display panel 2B reduces the size of the image and displays it in high definition. As a result, the occupant of the following vehicle can reliably view the image displayed on the self-driving vehicle regardless of the difference in the inter-vehicle distance from the following vehicle. At the same time, the display panel on the rear side can be constructed at low cost.

In the present invention, when displaying an enlarged image as in the first embodiment, it may be displayed in the entire display area of the display panel including the high resolution panel and the low resolution panel, or It may be displayed only in the display area of the low resolution panel as in the case of mode 2. In any case, when displaying an image on the high resolution panel, the image may be displayed so as to fit within the display area of the high resolution panel.

In the first and second embodiments described above, in addition to the size of the image to be displayed, the shape and the brightness of the image (including brightness, saturation, and contrast) may be appropriately controlled. In particular, when the viewer is far away, the size of the image to be displayed is controlled, the brightness and the contrast are controlled to be high, and the brightness and the contrast are controlled to be reduced as the relative distance is shortened. Good.

The present invention may control the image to be displayed according to the traveling state of the vehicle without particularly detecting the viewer. For example, the image may be displayed in the entire display area of the display panel while the vehicle is traveling, and the image may be displayed in the display area of the high resolution panel when the vehicle is stopped. Alternatively, the occupant of the vehicle may artificially control the display mode of the image while confirming the situation around the autonomous driving vehicle. In the case of such a configuration, the viewer detection unit in the display control unit described in the first embodiment can be omitted, and the configuration of the image control unit can be simplified.

The present invention is not limited to the display device of the self-driving vehicle, but can be applied to a vehicle having a display panel on the vehicle body or the window. Further, the display panels provided in the vehicle do not necessarily have to be provided on all four side surfaces of the vehicle body of the vehicle, and the present invention can be applied to the provided display panels.

1 Self-driving car (own vehicle)
2 (2F, 2B, 2R, 2L) display panel 3 display control means 10 vehicle body 12 sliding door 13 vehicle body left side 14 roof 21-24 display panel (left side)
25 Display panel (front side)
31 sensor (viewer detection means)
32 Visual Detecting Section (Visual Detecting Means)
33 image control unit (image control means)
34 Communication device 35 Input section 211, 221, 231, 241, 251 High resolution panel 212, 222, 252 Low resolution panel

Claims (8)

The display panel is provided on a vehicle body for displaying a desired image, and the display panel includes a low-resolution panel for displaying an image at a low resolution and a high-resolution panel for displaying an image at a high resolution. The vehicle display device is characterized in that an image displayed in a display area including at least a low resolution panel can be displayed in a display area of a high resolution panel. The vehicle display device according to claim 1, wherein the display panel has a high-resolution panel arranged in a part of a display area and a low-resolution panel arranged in the other area. The vehicle display device according to claim 2, wherein an image displayed over both display areas of the low resolution panel and the high resolution panel can be reduced and displayed in the display area of the high resolution panel. The vehicle display device according to claim 2, wherein the image displayed in the display area of the low resolution panel can be reduced and displayed in the display area of the high resolution panel. The display control means includes a display control means for controlling an image displayed on the display panel, and the display control means is a visual recognition person who visually recognizes an image displayed on the display panel around the vehicle and a visual recognition means for detecting the position. Person detection means and image control means for controlling the image displayed on the display panel according to the position of the viewer detected by the viewer detection means, and the image control means responds to changes in the position of the viewer. The vehicle display device according to any one of claims 1 to 4, which controls an image to be displayed. The image control means controls the change of the size of the image according to the difference in the distance between the vehicle and the viewer, and when the distance is a predetermined distance or more, the image is displayed in an area including the display area of the low resolution panel. The vehicle display device according to claim 5, wherein the image is displayed, and the image is displayed in a display area of the high resolution panel when the distance becomes shorter than a predetermined distance. 7. The vehicle display device according to claim 1, wherein the vehicle is an autonomous vehicle, and the display panel is provided on a vehicle body of the autonomous vehicle. The vehicle includes a communication device wirelessly connected to the outside, and the image control means controls an image to be displayed and a display form thereof based on a signal received by the communication device or an instruction of an occupant of the vehicle. The vehicle display device according to claim 7.

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