JP2000142260A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a detailed map in a wide range and a powerful television image by ensuring a display area with a large image plane and high resolution inside an automobile. SOLUTION: A screen 1g is provided at the interior roof of an automobile. An on-vehicle projecting device 1f is connected to an on-vehicle television monitor 1a to project an image on the interior roof. A navigation device 1b is connected to display a map of assigned resolution on the interior roof. A video play-back device 1c and a television tuner 1d are connected to display a video image and a television image on the interior roof of the automobile. The images can be displayed in a large image plane with high resolution inside the automobile, and a wide range of a detailed map can be displayed in a navigation system. Since the video image and television image are displayed with the interior roof of the automobile as a screen, large projection space can be ensured, and the image can be seen directly above if a seat is tilted down. The image is highly visible even in the daytime because of not being much exposed to the sunlight, so that the powerful image can be displayed in a video reproducing system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle display device, and more particularly to an on-vehicle display device for displaying a map or video image of a car navigation system on a large screen with high resolution.

[0002]

2. Description of the Related Art Some in-vehicle display devices, such as a TFT-type liquid crystal display panel and a CRT, use a small in-vehicle television monitor as an in-vehicle display device for displaying a map or video image of a car navigation system in an automobile. In such an in-vehicle display device, output video information of the navigation system is sent to an in-vehicle television monitor and displayed on a liquid crystal screen or the like. Also, video information from the video video playback device and the TV tuner,
The data is sent to the on-board TV monitor and displayed.

However, in a conventional in-vehicle display device using a liquid crystal display panel or a CRT, the monitor screen size is at most about 10 inches and the resolution is about 640 dots × 480 dots. As described above, since the resolution of the television monitor screen is low and the screen is small, a detailed and wide-area map from the car navigation system cannot be sufficiently displayed. For video images and television images, powerful images cannot be displayed because the screen is small.

For this reason, a projection type display device for displaying a large screen has come to be used. An example of such a display device is disclosed in Japanese Patent Application Laid-Open No. 10-272982. This is a vehicle display device that displays an image on a screen so that a driver and other occupants can simultaneously see the same information. 4 and 5 show an example of a conventional projection display device for a vehicle.

[0005] In the conventional vehicle display device shown in FIG.
An image projected from a projector installed above the driver's seat in the vehicle interior is displayed as a virtual image in front of the driver's seat in the vehicle interior by a reflector installed in front of the driver's seat in the vehicle interior.
Light emitted from the light source of the projector passes through the liquid crystal display panel, a part is reflected by the half mirror, and the rest is transmitted. The reflected light is reflected by the reflector, further reflected by the reflector toward the driver's viewpoint, and recognized as a virtual image. On the other hand, light transmitted through the half mirror is collected by a lens, and an image displayed on the liquid crystal display panel is projected on a screen.

[0006] The driver can view the projected image while facing the front of the driver's seat, and can obtain information without greatly moving his or her line of sight. Other occupants can see the same information as the driver at the same time by looking at the image projected on the screen of the projector above the driver's seat. For this reason, when displaying navigation information or the like, another occupant can instruct the traveling direction of the vehicle while viewing the same information as the driver, and the vehicle can be operated more accurately.

In the conventional vehicle display device shown in FIG.
A large screen constituting the projector is installed in the upper rear part of the driver's seat. That is, the size of the screen of the projector is increased, and the screen is separated from the projector main body and arranged behind the driver's seat. The focusing lens has a focal length that forms an image on a screen disposed behind. By applying this vehicle display device to a large passenger car such as a bus, the same information as the driver can be provided to all passengers behind. For example, the driver can announce the current position of the vehicle and traffic information to a passenger behind while viewing the navigation information.

[0008]

However, the conventional in-vehicle display device cannot use a large screen unless it is a vehicle such as a large bus, and a small passenger car has a large screen with a high resolution and a large screen. There was a problem that video images could not be seen.

An object of the present invention is to solve the above problems and display a map or a video image on a large screen with a high resolution in an automobile such as a small passenger car.

[0010]

In order to solve the above-mentioned problems, according to the present invention, a display screen for a vehicle is provided on a ceiling of an automobile such as a small passenger car, and a video image is projected vertically on the screen. The projection type video projector is provided below the center of the vehicle. With this configuration, it is possible to display an image in a high-resolution display area on a screen larger than the TV monitor screen in a small car.

Also, a map display device of a navigation system having means for adjusting the display resolution is connected. With this configuration, a detailed and wide-area map can be displayed.

Further, a video image reproducing apparatus and a television receiver are connected. With this configuration, a powerful video image can be displayed on a large screen.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION
A projection screen is provided on the ceiling of an automobile such as a small passenger car, and a projection type video projection apparatus for projecting a video image vertically on the screen is provided at a lower portion in the center of the car. In addition, it has an effect of displaying a high-resolution image.

[0014] The second aspect of the present invention is the first aspect.
In the vehicle display device described above, a map display device of a navigation system is connected, and has an effect of displaying a map on a large screen.

The third aspect of the present invention is the second aspect of the present invention.
The vehicle display device according to the above, wherein the map display device has a means for adjusting a display resolution,
It has the effect of displaying a map on a large screen and at high resolution.

The fourth aspect of the present invention is the first aspect.
In the above-described display device for a vehicle, a video image reproducing device and a television receiver are connected, and the video image reproducing device and the television image are displayed on a large screen.

The fifth aspect of the present invention is the first aspect of the present invention.
In the display device for vehicle described, a map display device of a navigation system, a video image playback device,
A television receiver is connected to video signal switching means, and has an effect of switching between a map, a video image, and a television image to be displayed on a large screen.

FIG. 1 shows an embodiment of the present invention.
This will be described in detail with reference to FIG.

(Embodiment) In an embodiment of the present invention, a projection type video projector for projecting a large-screen and high-resolution image on a screen is provided in a vehicle, and a map, a video image and a television image of a car navigation system are displayed. This is an in-vehicle display device that displays a large screen and high resolution on a ceiling screen in an automobile.

FIG. 1 is a functional block diagram of an on-vehicle display device according to an embodiment of the present invention. In FIG.
The television monitor device 1a is a display device having an input / output information switching function. It takes in video information and audio information from a navigation system, a video playback device, and a TV tuner, performs video and audio switching, and provides a projection device.
Output video information to 1f and output audio information to audio device.

The navigation system 1b is a device that provides driving support such as displaying the position of the vehicle and providing route guidance to a destination. The video reproducing device 1c is a device for reproducing a recording medium such as a video tape. The TV tuner 1d is a device that receives information on TV broadcast channels. The video playback device 1c and the TV tuner 1d are collectively called a video output device. The audio device 1e is provided with a navigation system 1b and a video output device according to an instruction from the television monitor device 1a.
This is a device that outputs audio information from 1c and 1d through a speaker. The projection device 1f includes the navigation system 1b and the video output devices 1c and 1d transmitted from the television monitor device 1a.
This is a device that projects video information from a computer on a screen. The screen 1g is installed on the ceiling of the car,
This is a projection screen that displays the video output by 1f.

FIG. 2 is a flow chart of the display processing of the on-vehicle display device according to the embodiment of the present invention.

FIG. 3 is an installation state diagram of the vehicle-mounted display device according to the embodiment of the present invention. A screen 1g is installed horizontally on the ceiling in a small passenger car, and the screen 1g on the ceiling
Then, the projection device 1f is installed at a position where projection can be performed vertically from below. The installation position of the projection device 1f is behind the driver's seat and the passenger seat, and is a vacant space in a normal passenger car. In order to project on the screen 1g located on the ceiling in the car, the lens is installed between the driver's seat and the passenger's seat so that it faces the ceiling. The place where the image is projected is flat and white, and a clear image can be projected.

The operation of the on-vehicle display device according to the embodiment of the present invention configured as described above will be described with reference to the on-vehicle display display processing flow of FIG.

When displaying a map, first, a navigation process is performed (2a). The navigation device 1b reads a map recorded on a recording medium such as a CD-ROM, draws the map on an internal memory, and transmits the drawn map information to the television monitor device 1a. At this time, the rendering resolution in the internal memory can be designated so that the resolution is optimal when projected on the screen 1g.

When displaying a video image, a video reproduction process is performed (2b). In the video reproduction device 1c, the video and audio information recorded on a recording medium such as a video tape is read and transmitted to the television monitor device 1a.

When displaying a television image, a television display process is performed (2c). In the TV tuner 1d, a channel is designated, an image of the channel is received, and transmitted to the TV monitor device 1a.

Next, steps 2d to 2i are performed by the television monitor 1a. First, input information switching determination is performed (2d). The changeover switch determines which information of the reception information of the navigation system 1b, the video playback device 1c, and the TV tuner 1d is to be received.

When displaying a map, next, navigation information is taken in (2e). When switching to reception of navigation information is performed by the input information switching determination means (2d),
Video and audio information is received from the navigation system 1b.

When displaying a video image, video information is taken in (2f). When the input information switching determination means (2d) switches to receiving video playback information, video and audio information is received from the video playback device 1c.

When displaying a television picture, television information is taken in next (2g). Input information switching determination means (2
When switching to receiving TV tuner information in d),
Video and audio information is received from the TV tuner 1d.

Next, audio output processing is performed (2h). The audio information from the navigation system 1b and the video output devices 1c and 1d is transmitted to the audio device 1e.

Next, video output processing is performed (2i). The video information is displayed on the monitor screen of the television monitor device 1a itself, and the video information is transmitted to the projection device 1f.

Next, the projection output is determined (2j). In the projection device 1f, it is determined whether or not to project on the screen 1g by the changeover switch.

Finally, projection output processing is performed (2k). The projection device 1f performs projection on the screen.

As described above, in the embodiment of the present invention,
The in-vehicle display device has a projection-type video projection device that projects a large-screen, high-resolution image on the ceiling screen. The resolution can be displayed inside a small car.

[0037]

As is apparent from the above description, according to the present invention, the on-vehicle display device is provided with a projection screen on the ceiling of a car such as a small passenger car, and a projection type video for projecting a video image vertically on the screen. Since the projection device is provided below the center of the vehicle, an effect that a video image can be displayed on a large screen and at a high resolution in a small vehicle can be obtained.

Further, since the map display device of the navigation system having the means for adjusting the display resolution is connected, it is possible to display a detailed and wide-range map of the navigation system.

Also, since the video image reproducing device and the television receiver are connected, a large projection space can be secured, and the image can be viewed in front of the user by tilting the seat. The image can be seen better,
In the video reproduction system, an effect that powerful images can be displayed is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of an in-vehicle display device according to an embodiment of the present invention;

FIG. 2 is a flowchart of a display process of the vehicle-mounted display device according to the embodiment of the present invention;

FIG. 3 is an installation state diagram of the in-vehicle display device according to the embodiment of the present invention.

FIG. 4 is a conceptual diagram of a conventional in-vehicle display device,

FIG. 5 is a conceptual diagram of a conventional projection-type in-vehicle display device.

[Explanation of symbols]

 1a TV monitor device 1b Navigation device 1c Video playback device 1d TV tuner 1e Audio device 1f Projection device 1g Screen (ceiling)

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Claims (5)

[Claims] 1. An on-vehicle display comprising: a projection screen provided on a ceiling of an automobile such as a small passenger car; and a projection type video projection device for projecting a video image vertically on the screen is provided below a central portion of the interior of the vehicle. apparatus. 2. The vehicle display device according to claim 1, wherein a map display device of the navigation system is connected. 3. The vehicular display device according to claim 2, wherein said map display device has means for adjusting a display resolution. 4. The in-vehicle display device according to claim 1, wherein a video image reproducing device and a television receiver are connected. 5. The on-vehicle display device according to claim 1, wherein a map display device of the navigation system, a video image reproducing device, a television receiver, and a video signal switching means are connected.