JP2008213759A - On-vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle display device able to easily recognize that a displayed image is equal to the scene reflected in a door mirror on a passenger seat side. <P>SOLUTION: The on-vehicle display device has an image pick-up means fitted to a passenger seat side door mirror, a display means for displaying images taken by the image pick-up means in a display screen, a movable fitting means for moving the display means, and a control means for moving the display means to a predetermined position through the fitting means and comprising a function for controlling display of images of the door mirror so as to display images in the rear of the vehicle taken by the image pick-up means in the display screen. The display means may be disposed in a predetermined position between the drover's seat and the passenger seat at the same height with the position of the door mirror at an angle symmetrical relative to the angle of the door mirror on the driver's seat side in the right and left around the driver's seat. When the control means determines that the one's own vehicle travels on a highway, the control means may perform the door mirror image display control. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-vehicle display device, and more particularly to an in-vehicle display device suitable for confirming the rear of a vehicle in a range reflected in a door mirror.

  In general, on a display screen of an in-vehicle display device, information received from a navigation device or a VICS receiver is displayed, and a television image or a DVD image is displayed.

  In recent years, in addition to displaying such information, cameras are attached to the front, left and right sides, and the rear of a vehicle, and images captured by the camera are acquired and displayed on the display screen of an in-vehicle display device. ing. Usually, a door mirror or a room mirror is used to grasp the situation around the vehicle. However, there are cases where it is difficult to grasp the situation because there is a blind spot in the range that can be seen by the door mirror or the room mirror. Therefore, the camera video is displayed on the display screen to assist the driver's view.

As a technique related to this, Patent Document 1 discloses a device that displays a rear view of a vehicle on a display device and allows the driver to check the rear while gazing forward.
Japanese Patent Laid-Open No. 5-38977

  As described above, it is possible to attach the camera to the vehicle, display the image information acquired by the camera on the display screen, and provide the vehicle surrounding information to the driver.

  However, when the image displayed on the passenger's side door mirror is displayed on the display screen and the image is displayed, the image is a television broadcast image, or a rear view of the vehicle equivalent to the landscape reflected on the door mirror, or the door mirror. It may not be possible to determine whether the scene is reflected in the front or the scene in front. For this reason, even if an image of a vehicle approaching from behind is displayed in the scene reflected on the door mirror, the danger cannot be immediately detected, and there is a possibility that a problem may occur in safe driving.

  The present invention has been made in view of the problems of the prior art, and provides an in-vehicle display device that can easily recognize that a displayed image is equivalent to a scene reflected on a passenger side door mirror. With the goal.

  In order to solve the above-described problems of the prior art, according to the basic form of the present invention, imaging means attached to a passenger seat side door mirror, display means for displaying an image photographed by the imaging means on a display screen, and Movable attachment means for allowing the display means to move, and a door mirror for moving the display means to a predetermined position via the attachment means and displaying an image of the vehicle rear imaged by the imaging means on the display screen An in-vehicle display device characterized by having a control means having a function of video display control is provided.

  In the vehicle-mounted display device according to this aspect, the display means is disposed between the driver seat and the passenger seat, the predetermined position is the same height as the position of the door mirror, and the door mirror on the driver seat side The display means may have a light emitting portion around it, and the control means may change the light emission color of the light emitting portion of the outer frame of the passenger side door mirror. The color may be the same as the color.

  The in-vehicle display device according to this aspect further includes own vehicle position detecting means for detecting the current position of the own vehicle and map data storage means for storing map data, and the control means includes the own vehicle When it is determined from the position and map data that the vehicle is traveling on the highway, the door mirror image display control may be performed, and further, there is a vehicle speed detection means for detecting the vehicle speed, and the control means When it is determined that the vehicle speed of the host vehicle has reached a predetermined speed, the door mirror video display control may be performed, and further, an operation unit is provided, and the control unit is configured to perform the imaging via the operation unit The door mirror video display control may be performed when an instruction to display the video shot by the means is displayed on the display screen.

  According to the vehicle-mounted display device according to this embodiment, the position of the display device is made the same as the height of the door mirror, and the video by the camera (imaging means) attached to the passenger side door mirror is displayed on the display screen. As a result, it is possible to easily recognize that the image displayed on the display screen is an image equivalent to the scenery seen from the passenger side door mirror.

  Also, by viewing the display screen of the display device arranged between the driver's seat and the passenger seat, the scenery by the passenger seat side door mirror can be seen, and it is not necessary to see the actual passenger seat side door mirror. Thereby, the movement of the line of sight when confirming the back is small, and it becomes possible to prevent the occurrence of a dangerous state due to turning the line of sight from the front.

  In addition, when the vehicle is traveling at high speed, the position of the display device is automatically moved to display an image equivalent to the scenery reflected on the passenger side door mirror. As a result, the movement range of the driver's line of sight can be made narrower than when the actual door mirror is viewed, and the danger that may occur due to the wide movement range of the line of sight when traveling at high speed can be avoided, contributing to safe driving. It becomes possible.

  In addition, an image by a camera manually attached to the passenger side door mirror by the user is displayed on the display screen. This makes it possible to narrow the line-of-sight movement range even during low-speed traveling, and thus contributes to safe driving for elderly people who have a particularly narrow field of view during driving.

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

(Configuration of in-vehicle navigation system)
FIG. 1 is a block diagram showing the configuration of an in-vehicle navigation device equipped with an in-vehicle display device according to an embodiment of the present invention.

  In the figure, reference numeral 1 denotes a storage medium in which map data and other guidance data are stored. In the present embodiment, a DVD (DVD-ROM) is used as a storage medium for storing such data, but a hard disk or other storage medium may be used. The map stored here is divided into longitude and latitude widths of appropriate sizes according to each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. Roads, buildings, facilities, and other various properties included in are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Map data includes (1) a road layer composed of a road list, a node table, an intersection configuration node list, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image, (3) It consists of a character / symbol layer or the like for displaying a letter indicating a administrative division name such as a municipality name, a road name, an intersection name, or a map symbol.

  Further, the DVD 1 stores road data expressing the shape of the road used for map matching. This road data is composed of a shape node and a link between shape nodes having different distances between nodes according to the shape of the road.

  An operation unit 2 is provided with operation buttons and the like for operating the navigation apparatus body 10. In the present embodiment, the operation unit 2 includes a remote control transmitter and a remote control receiver, and the user can operate the navigation apparatus body 10 with the remote control transmitter at hand.

  Also, 3 receives GPS signals sent from a plurality of GPS satellites and generates and outputs GPS data such as longitude, latitude, PDOP (Position DOP) value and HDOP (Horizontal DOP) value of the current position of the vehicle. A GPS receiver is shown. Reference numeral 4 denotes a self-contained navigation sensor. The self-contained navigation sensor 4 is composed of an angle sensor such as a gyro that detects the vehicle rotation angle and a travel distance sensor that generates a pulse at every constant travel distance, and detects the travel speed of the host vehicle. Used.

  Reference numeral 5 denotes a communication device such as an in-vehicle telephone for communicating with various service centers, and 6 denotes a VICS receiver that receives VICS (road traffic information communication system) information transmitted from a radio wave beacon or an optical beacon. These beacons are installed on the roadside and connected to police stations, road managers and integration centers to provide information on traffic jams in the vicinity.

  Reference numeral 7 denotes a display unit such as a liquid crystal panel, and the navigation apparatus body 10 displays a map around the current position of the vehicle on the display screen of the display unit 7, guide routes from the departure point to the destination, Display vehicle marks and other guidance information. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.

  Reference numeral 9 denotes a camera (imaging means) that acquires the situation around the vehicle, and is installed on the front, left and right sides, rear, etc. of the vehicle.

  The navigation device body 10 is composed of the following. Reference numeral 11 denotes a buffer memory that temporarily stores map data read from the DVD-ROM 1 a via the DVD-ROM drive 1.

  Reference numeral 12 denotes a control unit constituted by a microcomputer. The control unit 12 has a built-in navigation program (a program for performing display output control necessary for route search processing and route guidance based thereon), and is output from the GPS receiver 3 in accordance with this program. The current position of the host vehicle is detected based on the signal, the traveling speed (vehicle speed) of the host vehicle is calculated based on the signal output from the autonomous navigation sensor 4, and the map data to be displayed is displayed in the DBD-ROM drive. 1 to the buffer memory 11 from the DVD-ROM 1a, and to search for a guide route from the starting point to the destination under the search conditions set using the map data read to the buffer memory 11, etc. Execute the process.

  13 is a map drawing unit that generates a map image using the map data read to the buffer memory 11, and 14 is an operation screen that generates various menu screens and various marks such as a vehicle position mark and a cursor according to the operation status. It is a mark generation unit.

  Reference numeral 15 denotes a guide route storage unit that stores the guide route searched by the control unit 12, and 16 denotes a guide route drawing unit that draws the guide route. The guidance route storage unit 15 stores all the nodes of the guidance route searched by the control unit 12 from the departure point to the destination. When displaying the map, the guide route drawing unit 16 reads the guide route information from the guide route storage unit 15 and draws the guide route with a color and line width different from those of other roads.

  Reference numeral 17 denotes a storage unit that stores information such as the angle and height of the door mirror.

  An audio output unit 18 supplies an audio signal to the speaker 8 based on a signal from the control unit 12.

  Reference numeral 19 denotes an image composition unit, on which a map image drawn by the map drawing unit 13 is overlaid with various marks and operation screens generated by the operation screen / mark generation unit 14, a guidance route drawn by the guidance route drawing unit 16, and the like. To display on the display screen of the display unit 7.

(Configuration of in-vehicle display device)
Next, the configuration of the in-vehicle display device will be described.

  FIG. 2 is a block diagram of the in-vehicle display device. The in-vehicle display device is a part of the navigation device.

  The in-vehicle display device includes a display unit (display device body) 7, a display processing unit 22, a movable mounting unit 21, a storage unit 17, a self-supporting navigation sensor 4, a camera 9, an operation unit 2, and a map storage. The unit 23 and the control unit 12 are included.

  Among these, the movable attachment portion 21 is for attaching the display device body 7 in the vehicle interior, and is movable.

  The display screen of the display device body 7 is configured using, for example, a liquid crystal display device (LCD). The display device body 7 is installed at a predetermined position in the vehicle compartment via the movable mounting portion 21. Usually, it is installed in a vehicle interior position where the driver can easily see, for example, between the driver seat and the passenger seat.

  FIG. 3 shows an example of the display device body 7 and the movable attachment portion 21 connected thereto. The movable attachment portion 21 is movable, moves according to an instruction from the control portion 12 via a motor (not shown), and is fixed in a predetermined state.

  The movable attachment portion 21 includes three connecting portions (32a, 32b, 32c) formed to be capable of rotating to change the relative positional relationship between the instrument panel and the display device body 7, and a movable arm ( 31a, 31b). The connecting portion 32a connects a predetermined position of the instrument panel and the movable arm 31a. The connecting part 32b connects the two movable arms 31a and 31b. The connecting portion 32 c connects the movable arm 31 b and the display device body 7. Each connecting portion (32a, 32b, 32c) can rotate in the vertical direction, and the movable arm (31a, 31b) can rotate in the vertical direction according to the rotation of the connecting portion. Moreover, a connection part (32a, 32b, 32c) can be fixed at arbitrary angles.

  The connecting portion 32c that connects the movable arm 31b and the display device main body 7 may have a spherical shape so that the degree of freedom in the rotation direction is three.

  The storage unit 17 stores height information that is the same as the height of the door mirror, color information of the outer frame of the door mirror, and angle information of the door mirror on the driver's seat side.

  The camera 9 is attached to the passenger seat side door mirror and captures an image equivalent to the scenery viewed from the door mirror (hereinafter also referred to as a door mirror image).

  The display processing unit 22 converts the data captured by the camera 9 into a predetermined format video signal (for example, NTSC format signal). This video signal is output to the display device body 7, and the video is displayed on the display screen. At the time of this display, an image in which the situation behind the vehicle is photographed may be converted into a horizontally inverted image.

  The control unit 12 acquires travel speed data from the self-contained navigation sensor 4 of the navigation device 10, and performs door mirror video display control based on the speed data. The door mirror image display control is a series of operations for controlling the movable mounting portion 21 to move it, moving the display device body 7 to a predetermined position, and displaying an image of the vehicle rear imaged by the camera 9 on the display screen. It is processing.

  Further, the control unit 12 detects the position of the own vehicle from the self-contained navigation sensor 4 of the navigation device 10, the GPS receiver 3, etc., performs map matching with the map data stored in the map storage unit 23, and Is traveling on a general road or on a highway. As a result of this determination, door mirror image display control is performed when the vehicle is traveling on an expressway.

  Further, the control unit 12 performs door mirror video display control when an instruction to perform door mirror video display control is received from the user via the operation unit 2.

(Description of operation)
Next, the door mirror video display process will be described with reference to the flowchart of FIG. It is assumed that the door mirror video display control is not selected on the display screen of the display device body 7. In addition, it is assumed that the control unit 12 always monitors the traveling state of the own vehicle. That is, it is assumed that the speed information of the own vehicle is acquired from the self-contained navigation sensor 4 and the position of the own vehicle is detected. In addition, it is assumed that the control unit 12 always monitors instruction information acquired from the user via the operation unit 2.

  First, in step S11, information corresponding to the user's operation is displayed on the display screen of the display device body 7. Navigation information is displayed when navigation information display is selected, and audio information is displayed when information display by the audio device is selected.

  In the next step S12, it is determined whether or not the host vehicle is traveling at high speed. Specifically, this corresponds to the case of traveling on a highway. Whether the vehicle is traveling on an expressway is determined by detecting the vehicle position and referring to the map data. This also applies when the vehicle traveling speed is 80 km / h or more, for example. When it is determined that the host vehicle is traveling at high speed, the process proceeds to step S14. When it is determined that the host vehicle is not traveling at high speed, the process proceeds to step S13.

  In the next step S <b> 13, it is determined whether there is a request for door mirror video display from the user via the operation unit 2. If there is a request for door mirror video display, the process proceeds to step S14. If there is no request for door mirror video display, the process returns to step S11, and the information displayed at that time is continuously displayed on the display screen. .

  The next step S14 to step S17 show a series of processes for displaying the door mirror video on the display screen.

  In step S14, the angle of the door mirror on the driver's seat side is acquired. The angle of the door mirror on the driver's seat side is adjusted by a door mirror adjustment unit (not shown) of the vehicle. Information such as the adjusted angle is stored in the storage unit 17, and the control unit 12 acquires this information.

  In the next step S15, the position of the display device body 7 is adjusted. The height of the display device body 7 is set to be the same as the height at which the door mirror is installed. This height is stored in the storage unit 17 in advance. For example, when the display device body 7 is connected to the movable arm 31 as shown in FIG. 3, how the movable arm 31 is moved is stored in the storage unit 17 in advance.

  FIG. 3A shows a side view of the display device body 7 and the movable mounting portion 21 in a state where no door mirror image is displayed on the display screen of the display device body 7. At this time, the height from the instrument panel to the upper side of the display screen is H1. FIG. 3B shows a side view of the display device main body 7 and the movable mounting portion 21 in a state where a door mirror image is displayed on the display screen of the display device main body 7. The movable arm 31 is moved to move the instrument. This indicates that the height H2 from the attachment panel to the upper side of the display screen is higher than H1.

  The control unit 12 operates the movable arm 31 to a predetermined height, and adjusts the connecting unit 32 based on the angle information acquired in step S14 so as to be symmetrical with the driver seat side door mirror around the driver seat. Move the display device body.

  In the next step S <b> 16, a camera image behind the vehicle seen from the passenger side door mirror is acquired.

  In the next step S17, the camera image signal acquired in step S16 is supplied to the display screen of the display device body 7, and an image behind the vehicle seen from the passenger side door mirror is displayed. At the time of this display, the video signal is reversed left and right to reproduce the scenery reflected on the door mirror.

  In the next step S18, it is determined whether or not the host vehicle is traveling at a low speed. Specifically, it is determined whether or not the vehicle is traveling on a general road. Further, it is determined whether or not the vehicle is traveling at a speed of 80 km / h or less. If it is determined that the vehicle is traveling at a low speed, the process proceeds to step S20. If it is determined that the vehicle is not traveling at a low speed, the process proceeds to step S19.

  In the next step S19, it is determined whether or not the user has manually selected a process other than door mirror video display. When processing other than the door mirror video display is selected, the process proceeds to step S20, and when there is no operation of the operation unit 2 from the user, the process returns to step S16 and the door mirror video display is continued.

  In the next step S20, the position of the display device body 7 is returned to the original position, the process returns to step S11, and information other than the door mirror image is displayed. For example, when the display of navigation information is selected in step S19, the navigation information is displayed. In addition, when a transition is made from highway traveling to general road traveling and the door mirror image is automatically stopped, information on the state before switching to the door mirror image may be displayed.

  FIG. 5 is a schematic diagram showing an example of an instrument panel on which the vehicle display device body 7 is installed. FIG. 5A shows a state before door mirror video display control is performed, and FIG. 5B shows a state after door mirror video display control is performed.

  As shown in FIG. 5A, the display device body 7 is installed at a predetermined position of the instrument panel 51 (a position lower than the height of the door mirror (54, 55) between the driver seat and the passenger seat). Has been. For example, navigation information is displayed on the display screen of the display device body 7.

  In this state, when the vehicle enters the highway, the control unit 12 performs door mirror image display processing, and the position of the display device body 7 moves as shown in FIG. The display device body 7 is lifted to the same height as the door mirror 54 by moving the movable mounting portion 21. The display device body 7 is directed toward the driver's seat at a predetermined angle. This orientation is made to contrast with the angle of the mirror of the door mirror 55 on the driver's seat side and the driver's seat as the center. After moving the position of the display device main body in this way, an image taken by the camera 9 equivalent to the scenery shown on the passenger side door mirror is displayed on the display screen.

  As a result, the driver can easily recognize that the image displayed on the display screen is a scene reflected on the passenger side door mirror 54a, and the line of sight can be moved little even during high-speed driving. This makes it possible to check backwards and contribute to safe driving.

  As described above, in the present embodiment, when the host vehicle is traveling at a high speed or according to an instruction from the user, an image equivalent to the scenery reflected on the passenger side door mirror is displayed on the display screen of the display device body 7. is doing. At this time, the position of the display device body 7 is moved to the same height as the door mirror so that the angle of the display device body 7 is symmetric with the angle of the door mirror on the driver's seat side. As a result, it is possible to easily recognize that the video displayed on the display screen is a scene reflected in the passenger side door mirror.

  In addition, when the vehicle is traveling at a high speed, the position of the display device body 7 is automatically moved to display an image equivalent to a scene reflected on the passenger side door mirror. As a result, the movement range of the driver's line of sight can be made narrower than when the actual door mirror is viewed, and the danger that may occur due to the wide movement range of the line of sight when traveling at high speed can be avoided, contributing to safe driving. It becomes possible.

  Further, the door mirror image is displayed on the display screen by the user manually instructing to display the door mirror image on the display screen. This makes it possible to narrow the line-of-sight movement range even during low-speed traveling, and thus contributes to safe driving for elderly people who have a particularly narrow field of view during driving.

  In the present embodiment, the display device body 7 is set to the same height as the door mirror, and the angle is symmetric with the door mirror on the driver's seat side, so that the display image is equivalent to the scenery reflected on the passenger side door mirror. Although it can be easily grasped, the color of the peripheral portion of the display device body 7 may be the same as the color of the outer frame 54b of the passenger side door mirror. The color of the outer frame 54b of the passenger side door mirror is stored in advance in the storage unit 17, and the control unit 12 acquires color information from the storage unit 17 when performing door mirror video display control. In accordance with this color information, a light emitting element such as an LED provided around the display device body 7 is controlled to have a desired color. Further, the display screen of the display device main body 7 may have a desired color around the display screen. As a result, the driver can more naturally recognize that the door mirror image is displayed on the display screen of the display device body 7.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the vehicle-mounted display apparatus in the navigation apparatus which concerns on FIG. FIGS. 3A and 3B are diagrams illustrating an example of the display device main body and the movable mounting portion. It is a flowchart which shows an example of the door mirror video display process in the vehicle-mounted display apparatus which concerns on FIG. FIGS. 5A and 5B are diagrams illustrating an example of an instrument panel on which a display device main body is installed.

Explanation of symbols

2 ... operation part (operation means),
3 GPS receiver (own vehicle position detection means),
4 ... Self-contained navigation sensor (vehicle speed detection means),
7: Display section (display means),
9: Camera (imaging means),
10 ... navigation device,
12 ... control unit,
17 ... storage part,
21 ... movable attachment part (attachment means),
22 ... display processing unit,
23: Map storage unit (map data storage means).

Claims (6)

Imaging means attached to the passenger side door mirror;
Display means for displaying the video imaged by the imaging means on a display screen;
Movable attachment means for enabling movement of the display means;
Control means having a function of door mirror image display control for moving the display means to a predetermined position via the attachment means and displaying an image of the rear of the vehicle imaged by the imaging means on the display screen. A vehicle-mounted display device. The display means is disposed between a driver seat and a passenger seat,
The in-vehicle display device according to claim 1, wherein the predetermined position is the same height as the position of the door mirror, and is symmetrical with respect to the angle of the door mirror on the driver's seat side and the driver's seat. The display means has a light emitting portion around it,
The in-vehicle display device according to claim 1, wherein the control unit sets the light emission color of the light emitting unit to the same color as the color of the outer frame of the passenger seat side door mirror. Furthermore, own vehicle position detection means for detecting the current position of the own vehicle;
Map data storage means storing map data;
The said control means performs the said door mirror image display control, when it determines with the own vehicle driving | running | working the highway from the own vehicle position and map data, It is any one of Claim 1 to 3 characterized by the above-mentioned. The on-vehicle display device described. Furthermore, it has vehicle speed detection means for detecting the vehicle speed,
The in-vehicle display device according to any one of claims 1 to 3, wherein the control unit performs the door mirror image display control when it is determined that the vehicle speed of the host vehicle has reached a predetermined speed. Furthermore, it has an operation means,
The said control means performs the said door mirror image display control, when the instruction | indication which displays the image | video image | photographed by the said imaging means via the said operation means on the said display screen is received. The vehicle-mounted display device according to any one of 3.

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