JPH11222052A - Automotive information display device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a driver to visually recognize a rear image of a car displayed on a display display while his / her posture is checked even when the driver looks directly back. SOLUTION: When a display 14 having a display surface in both front and rear directions is arranged between a front seat and a rear seat in a vehicle, and a gear change lever of the vehicle is engaged in a mode other than the backward movement driving mode. At the same time, an information image such as a TV broadcast is displayed on the rear side of the display 14, and a predetermined image is taken for a driver who looks backward when the gear change lever of the automobile is put into the backward movement driving mode. An image captured by the camera behind the automobile is displayed on the front side of the display 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying communication information such as car navigation information and VICS information and predetermined information such as a rear image for confirming the rear of an automobile as an image in the automobile. In particular, the present invention relates to a display device capable of visually recognizing information from both a front seat side and a rear seat side of an automobile.

[0002]

2. Description of the Related Art Along with the recent technological development, various technological advances have been made in the field of automobiles such as passenger cars.
In particular, the development of electronics technology has been remarkable, and with this, in a car, driving while checking various information such as communication information such as car navigation information and VICS information and a rear image for checking the back of the car. It is possible to do.

Generally, as shown in FIG. 7, a liquid crystal display or the like installed in front of a front seat such as a driver's seat S1 such as in an instrument panel 1 or in front of a gear change unit 2 as shown in FIG. Of the display device 3 is used. That is, during driving, at a signal waiting time, or the like, a viewer such as a driver visually recognizes the display device 3 in front of the driver, and performs various information confirmations such as various communication information and an image behind the vehicle based on the display device 3. Was.

[0004] Of the above various information, communication information such as car navigation information and VICS information mainly includes various external information such as road congestion status and parking lot vacancy status regarding the route to the travel destination. The purpose is to obtain a target situation and to efficiently select or change a travel route, a destination, and the like.

[0005] The rear image of the vehicle is displayed for the purpose of confirming safety when the vehicle is moved backward and the like, and a CCD camera (not shown) is installed at the rear of the vehicle body. Is displayed on the display device 3 in front of the driver or the like.

[0006]

In particular, when the vehicle is driven to move backward, the driver rarely drives while looking forward. Usually, the driver looks backward and directly checks the rear through the rear window of the vehicle body. And drive. Therefore, even if the rear image from the CCD camera is displayed on the display device 3 in front, the driver rarely sees the image, and the display is often useless.
Also, by displaying the rear image on the front display device 3, the driver may be confused about which of the display device 3 and the rear rear window is to be selected for visual recognition, and may be immediately upset. There was a possibility that things would happen.

Accordingly, an object of the present invention is to provide a vehicle capable of visually recognizing a rear image of a vehicle displayed on a display display while the driver is directly looking back and checking the rear. An object of the present invention is to provide an information display device.

[0008]

Means for Solving the Problems In order to solve the above problems,
According to the first aspect of the present invention, a self-luminous display having a display surface in both front and rear directions and disposed between a front seat and a rear seat in an automobile, and controls a display image of the display. A control unit, wherein the control unit has a function of switching the scanning direction of the display display from left to right in response to a signal from a vehicle.

According to a second aspect of the present invention, an optical shutter for blocking light in accordance with control from the control unit is provided on both front and rear surfaces of the display.

According to a third aspect of the present invention, the control unit switches a scanning direction of the display display to left or right in accordance with a predetermined signal from the vehicle and stores predetermined information on one of front and rear surfaces. , And
It has a function of controlling the optical shutter provided on the other surface of the front and rear to shield light.

According to a fourth aspect of the present invention, there is provided a self-luminous display having a display surface in both front and rear directions and disposed between a front seat and a rear seat in an automobile, and a display image of the display. Control unit for controlling the display, the display display, the front liquid crystal display panel facing the front, the rear liquid crystal display panel facing the rear side are arranged opposite to each other, shared between the two liquid crystal display panel A backlight is arranged.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a diagram showing a vehicle information display device according to a first embodiment of the present invention. As shown in FIG.
For example, such as a one-box car or an RV (recreational vehicle) -based car, it is mounted on a car or the like in which it is difficult to directly see the rear of the vehicle body from the driver's seat by loading a lot of luggage in the rear space inside the room. Thing,
Front seat 12 (including driver's seat 11) and rear seat 1 in a car
3, a display 14 having a display surface in both front and rear directions is provided, and when the gear change lever of the vehicle is put into the back mode (backward traveling driving mode), the driver looks back. A rear image of the vehicle is displayed on the front side of the display 14 and communication information such as car navigation information and VICS information is displayed on the display 14 when the gear change lever of the vehicle is in a mode other than the back mode. This is displayed on the rear side.

The display 14 is hung from the ceiling of the automobile via a hinge member 15 and is attached to the hinge member 15 through a deformable flexible wiring (not shown) routed inside the hinge member 15. A control unit 16 fixed at a predetermined position on the ceiling of the automobile (FIG. 3)
It is connected to the.

As shown in FIG. 2, the display 14 has shutter liquid crystal panels 23 and 24 on both the front and back sides of one EL display element 21. One of the shutter liquid crystal panels 23 and 24 is provided. While the light is transmitted as a voltage, the other shutter liquid crystal plates 23 and 24 are shielded with no voltage so that external light does not pass through the screen of the display device.

Here, the EL display element 21 is made of a transparent IT.
The first transparent electrode layer 25 is formed by using a conductive material such as an O (indium-tin-oxide) film and shared by the EL display element 21, and the first transparent electrode layer 25 is formed by using a transparent organic material. An organic light-emitting layer 26 formed on one side and a second transparent electrode layer 27 formed on one side of the organic light-emitting layer 26 using a transparent ultra-thin conductive film made of metal or the like are formed. ing.

The first transparent electrode layer 25 includes the control unit 1
6 (FIG. 3) from which an anode voltage for image control is applied, and a plurality of pixel portions arranged in a matrix for image formation are formed by various deposition techniques and etching removal techniques. It is formed to a predetermined thickness.

On the other hand, the second transparent electrode layer 27 is a light-transmitting conductive film to which a cathode voltage (ground electrode) from the control unit 16 is applied, and is formed to a predetermined thickness by various vapor deposition techniques. It is formed in an ultrathin film to the extent that light can be transmitted in order to ensure its transparency. The material of the second transparent electrode layer 27 is Mg / Ag, Al /
Those having high electron injection efficiency (small work function) such as Li and Al / LiF into the organic light emitting layer 26 are selected. In the manufacturing process, the first transparent electrode layer 25 and the organic light emitting layer 26 are deposited and deposited. After being sequentially formed by etching, the second transparent electrode layer 27 can be easily formed by uniformly depositing the second transparent electrode layer 27 over the entire outer surface.

The organic light emitting layer 26 is classified into a single layer type and a laminated type in which a plurality of layers are laminated. The first transparent electrode layer 25 serving as an anode and the second transparent electrode layer 27 serving as a cathode. Are provided between the transparent electrode layers 27 so as to emit light in a predetermined color (for example, orange) by applying respective voltages to the transparent electrode layers 27. The organic light emitting layer 26 is also formed to a predetermined thickness by various vapor deposition techniques.

While the liquid crystal panels for shutters 23 and 24 are displaying images on one of the front and back surfaces of the display 14, the surface opposite to the displayed surface is prevented from transmitting light so that no display is performed. A liquid crystal display panel of a guest-host type or a twisted nematic type is used, a liquid crystal layer is sandwiched between a pair of electrode layers, and a polarized light is disposed near one of the electrode layers. A general board (not shown) is used. The light-transmitting and light-shielding properties are obtained when there is no voltage, and the light-transmitting properties are obtained when a voltage is applied. Each of the shutter liquid crystal plates 23 and 24 may be of a DC drive system or an AC drive system, but if the drive system of the EL display element 21 matches, the first of the EL display element 21 is used. The transparent electrode layer 25 and the second transparent electrode layer 27 are
By sharing the electrodes as one of the electrode layers 3 and 24, the number of members can be reduced. That is, the shutter liquid crystal plates 23 and 24 can be configured as a three-layer structure of a liquid crystal layer, the other electrode, and a polarizing plate by omitting one electrode.

The display 14 including the EL display element 21 and the liquid crystal plates 23 and 24 for both shutters is
The whole is hermetically sealed and protected by a predetermined transparent cover (not shown), and an airtight space in the transparent cover is filled with an inert gas, nitrogen gas, or the like.

FIG. 3 shows the display 1 described above.
4 shows the appearance of a control unit 16 for controlling the display of the control unit 4. FIG. 4 is a diagram showing a state in which the display 14 is connected to the control unit 16. In this control unit 16, as shown in FIG. 3, on the upper surface of the rectangular main body case 30, an antenna connection terminal 31 to which an external television (TV) signal receiving antenna (not shown) is connected, A rear video input terminal 32, which is connected to an external imaging camera (not shown) attached to the rear and receives a video signal of the rear of the outside of the automobile, and a predetermined flexible wiring (reference numeral 38 in FIG. )
And a multi-pin type display output terminal 33 that transmits a display control signal through the main body case 30.
An infrared receiver 34 such as a photodiode for receiving an infrared signal for remote control in a room is installed.
An external audio input terminal 35 and an external video input terminal 36 provided so as to be connected to an external device such as an S information receiver are installed, and a speaker 37 for sound blowing is installed on the other side of the main body case 30. ing. Although not shown in FIG. 3, a reverse signal indicating that the gear change lever is in the back mode (backward movement operation mode) is input to the surface of the main body case 30. The signal input terminal 39a and the ground connection terminal 3
9b, a power supply (Vcc) connection terminal 39c, and an illumination signal input terminal 39d to which an illumination signal for adjusting the brightness of the display 14 is input.
Are formed.

The main body case 30 is attached to a mounting hole (not shown) formed in the ceiling of the interior of the automobile, and the antenna connection terminal 31 and the rear video input terminal 32 are connected to a predetermined connection wire (not shown). (Not shown), are connected to an external TV signal receiving antenna and an external imaging camera, respectively, and the display output terminal 33 is connected to the display 14 via a predetermined flexible wiring 38.

As shown in FIG. 4, a receiving tuner 41 to which an external TV signal receiving antenna (not shown) is connected through an antenna connecting terminal 31 and a first transparent electrode of the display 14 as shown in FIG. A matrix control unit 42 that controls a display image by applying a predetermined voltage to each pixel unit arranged in a matrix on the layer 25;
The video signal input to the matrix control unit 42 is supplied from the receiving tuner 41 as a “TV video signal (terminal 1 a)” and a “video signal outside the vehicle (terminal 2 a)” supplied through the rear video input terminal 32 and the external video. Input terminal 3
6, a first three-terminal switch 43 for switching between "another input video signal (terminal 3a)", an output amplifier 44 for adjusting the audio output level of the speaker 37, and an amplification gain of the output amplifier 44. The audio signal input to the variable resistor 45 and the output amplifier 44 is converted into a “TV audio signal (terminal 1 b)” and “non-audio (terminal 2 b)” from the receiving tuner 41 and “others” from the external audio input terminal 35. Second three-terminal switch (sound-switching three-terminal switch) 46 for switching to the “input audio signal (terminal 3b)”.
And a switching control of the first three-terminal switch 43 and the second three-terminal switch 46 based on the infrared signal received by the infrared receiver 34 and the reception tuner 41.
And a driving voltage applied to the shutter liquid crystal panel 24 facing the front side Fw in response to the reception of the reverse signal at the reverse signal input terminal 39a. Liquid crystal panel 2
Liquid crystal changeover switch 48 which is selectively switched from 3 to give
And built-in.

Here, the matrix control unit 42
The video signal input through the three-terminal switch 43 is decoded to drive and control the display of each pixel on the display surface of the two-dimensional plane appearing on the first transparent electrode layer 25. The display output terminal 33 for each pixel of the electrode layer 25
The main scanning of the pixels is performed in the horizontal axis direction of the first transparent electrode layer 25 and the sub-scanning is performed in the vertical axis direction. In particular, depending on the presence or absence of the reverse signal input from the reverse signal input terminal 39a,
It has a function of switching the main scanning in the horizontal axis direction to the reverse direction in the left-right direction (F1, F2). That is, the reverse signal input terminal 3
When no reverse signal is given to 9a (normal time)
Since the driver basically drives while looking forward, there is no need to display the EL display element 22 on the driver's seat side (front side) Fw, and the EL on the rear seat side (rear side) Bk. Since only the display element 21 needs to be displayed so as to be visible from the rear side Bk, the scanning direction of the pixels of the first transparent electrode layer 25 is the first arrow in FIG. Control is performed to scan in the viewing direction F1. On the other hand, when the reverse signal is given to the reverse signal input terminal 39a (during the backward traveling operation of the vehicle), the driver basically drives while confirming the safety of the rear, so that the driver moves to the front side Fw. Display is performed by the EL display element 22 facing the rear side Bk.
Since the display of the EL display element 21 may be interrupted,
The scanning direction of the pixels of the first transparent electrode layer 25 is controlled so as to scan in a second arrow direction F2 in FIG. 2 suitable for visual recognition from the front side Fw.

The first three-terminal switch 43 is selectively controlled to switch among the three terminals 1a to 3a by an infrared control unit 47 based on a remote operation instruction by infrared light, and is also reverse-controlled from a reverse signal input terminal 39a. The signal is automatically switched to “a video signal (terminal 2a) at the rear of the vehicle” in response to the signal.

The second three-terminal switch 46 is
Three terminals 1a to 3 based on remote control instructions by infrared rays
a is selectively controlled by the infrared controller 47.

The liquid crystal changeover switch 48 includes an excitation coil 48a disposed between the reverse signal input terminal 39a and the ground potential, and selectively supplies the shutter liquid crystal plates 23 and 24 to the power supply voltage Vcc when excited by the excitation coil 48a. In the initial state, the induction switching contact 48b is connected to the shutter liquid crystal panel 23 on the rear side Bk disposed so as to face the rear seat, and is connected to the power supply voltage Vc.
c (that is, the shutter liquid crystal panel 2 on the rear side Bk).
When only a reverse signal is supplied to the reverse signal input terminal 39a, the excitation coil 48a is electromagnetically excited and the induction switching contact 48b is arranged to face the driver's seat side Fw. The power supply voltage Vcc is supplied by connecting to the shutter liquid crystal panel 24 on the front side Fw (that is, only the front liquid crystal panel 24 on the front side Fw becomes translucent).

The operation of the information display device for a vehicle having the above configuration will be described.

First, when the driver sets the gear change lever to a mode other than the reverse mode (for example, a forward mode such as "1st speed" to "3rd speed" or "neutral") (normal time), the display 14 is displayed. Is displayed on the back B
k, but not for the front Fw.

That is, in the normal state, the reverse signal is not supplied to the reverse signal input terminal 39a, and accordingly, the matrix control section 42 changes the main scanning direction of the pixels of the first transparent electrode layer 25 to Switching control is performed so that scanning is performed in the first arrow viewing direction F1 in FIG. 2 suitable for visual recognition from behind.

When no reverse signal is applied, no current flows through the excitation coil 48a, so that the inductive switching contact 48b is connected to the shutter liquid crystal panel 23 on the rear side Bk to supply the power supply voltage Vcc. As a result, only the shutter liquid crystal panel 23 on the rear side Bk becomes translucent, and the shutter liquid crystal panel 24 on the front side Fw maintains the light shielding property. That is, the display 14 is in a display state when viewed from the rear side Bk, and is in a non-display state when viewed from the front side Fw.

In this state, a person in the rear seat of the automobile performs a remote control using infrared rays by using a predetermined remote control device (not shown). Received,
The first three-terminal switch 43 and the second three-terminal switch 46 are switched by the switching control of the infrared controller 47, and are inputted from the receiving tuner 41 through the TV broadcast video or the external video input terminal 36. The other input video information is supplied to the matrix control unit 42, and the corresponding audio information is amplified by the output amplifier 44 and output to the speaker 37.

Here, the matrix control unit 42 decodes the input video signal, and performs main scanning of the pixels in the horizontal axis direction of the first transparent electrode layer 25 and performs sub-scanning in the vertical axis direction. . At this time, as described above, the main scanning direction of the pixels of the first transparent electrode layer 25 is switched so as to scan in the first arrow direction F1 in FIG. 2 which is suitable for viewing from behind. , Desired information can be visually recognized from the rear side Bk. At this time, when the display 14 is viewed from the front side Fw side, nothing can be visually recognized because the shutter liquid crystal panel 24 of the front side Fw is in a light shielding state (closed state).

Here, when the gear change lever is switched to the reverse mode in order for the driving vehicle to move backward, a reverse signal is given to the reverse signal input terminal 39a.
Is switched so that the main scanning direction of the pixels of the first transparent electrode layer 25 is scanned in the second arrow direction F2 in FIG. 2 suitable for visual recognition from the front.

When a reverse signal is applied, a current flows through the excitation coil 48a, so that the induction switching contact 48b is connected to the shutter liquid crystal panel 24 on the front side Fw to supply the power supply voltage Vcc thereto. As a result, the front side F
Only the shutter liquid crystal panel 24 of w becomes translucent, and the shutter liquid crystal panel 23 of the rear side Bk maintains the light shielding property. That is, the display 14 is in a display state when viewed from the front side Fw, and is in a non-display state when viewed from the rear side Bk.

The first three-terminal switch 43 is
In response to the reverse signal given from the reverse signal input terminal 39a, the video signal (terminal 2
a) "automatically. It should be noted that the sound at this time may not be automatically switched by the second three-terminal switch 46, or the second three-terminal switch 46 may be switched in response to the input of the reverse signal. May be automatically switched to “no sound (terminal 2b)”.

Here, the matrix control unit 42 decodes the input video signal, and performs main scanning of the pixels in the horizontal axis direction of the first transparent electrode layer 25 and performs sub-scanning in the vertical axis direction. . At this time, as described above, the main scanning direction of the pixels of the first transparent electrode layer 25 is switched so as to scan in the second arrow direction F2 in FIG. 2 suitable for visual recognition from the front side Fw. Therefore, the driver turns (directly through the back glass of the car) or through the EL display element 22 of the display 14 while turning backward.
It is possible to perform backward traveling driving while confirming the safety behind the automobile.

When the information display device for an automobile is not used, the hinge member 15 of the display 14 is used.
May be rotated to tilt the display 14 in parallel with the ceiling wall.

As described above, when the gear change lever of the vehicle is set to the back mode, a rear image outside the vehicle is displayed on the front of the display 14 disposed behind the driver. When a large amount of luggage is loaded in the rear space of the vehicle and it is difficult to directly check the rear, the vehicle can be moved backward while visually recognizing the image displayed on the display 14. In this case, for the driver, after the vehicle is turned back in the same manner as in the situation where the driver directly confirms the rearward direction, the driver performs the direct rearward confirmation. Therefore, it is possible to prevent the driver from getting lost or upset compared to the conventional example in which the rear image is displayed in front.

Also, in normal times when the vehicle is not moving backward, predetermined information such as TV broadcasts can be viewed from the rear side Bk, so that the display 14 can be effectively used for various purposes.

{Second Embodiment} FIG. 5 is a diagram showing a display 14 of an information display device for a vehicle according to a second embodiment of the present invention, and FIG. 6 is a control in which the display 14 drives and controls the display. FIG. 3 is a block diagram showing a state connected to a unit 16. In FIGS. 5 and 6, elements having the same functions as in the first embodiment are denoted by the same reference numerals.

The information display device for a vehicle according to this embodiment is similar to the first embodiment in that information can be visually recognized from both front and rear directions of the vehicle as shown in FIG. 5, but the first embodiment is different from the first embodiment. A pair of EL display elements (21) as display elements
In contrast to this, in this embodiment, a pair of liquid crystal display panels 51 and 52 are arranged back and forth so as to be opposite to each other, and a common backlight 53 is arranged between them. It is a liquid crystal display device. Here, on each of the liquid crystal display panels 51 and 52, while a given video signal is decoded, each pixel on the two-dimensional plane is subjected to main scanning in the horizontal axis direction and sub-scanning in the vertical axis direction. The matrix control units 54 and 55 are connected.

As shown in FIG. 6, the internal configuration of the control unit 16 is the same as that described in the first embodiment, such as an antenna connection terminal 31, a rear video input terminal 32, a display output terminal 33, and an infrared light receiving section. 34, external audio input terminal 3
5, external video input terminal 36, speaker 37, reverse signal input terminal 39a, ground connection terminal 39b, power supply connection terminal 39c, illumination signal input terminal 39
d, the reception tuner 41, the output amplifier 44, the audio switching three-terminal switch 46, the infrared control unit 47, and the first matrix control unit 5 related to the first liquid crystal display panel 51.
A first switch 61 for switching the transmission of the TV image from the receiving tuner 41 to the first matrix control unit 54 and an external image input terminal 36 to the first matrix control unit 54.
Switch 62 for switching whether or not to transmit an external input video such as a car navigation image provided by a second switch 62, and a second matrix control unit 5 related to the second liquid crystal display panel 52
5, a third switch 63 for switching whether or not a TV image is transmitted from the receiving tuner 41, and an external image input terminal 36 for the second matrix control unit 55.
And a fourth switch 64 for switching whether or not to transmit an external input video such as a car navigation image provided by the first liquid crystal display panel 51 on the front side Fw in response to the reception of the reverse signal at the reverse signal input terminal 39a. One of the matrix control units 54 is provided with a forced switching relay 65 for forcibly inputting an external rear image signal of the automobile given from an external imaging camera (not shown) through the rear image input terminal 32. Note that the matrix control unit 42, the first three-terminal switch 43, and the liquid crystal switch 48 in the first embodiment are omitted, and the matrix control units 54 and 55, the first to fourth, respectively, are used as alternative elements. Switches 61 to 64 and a forced switching relay 65 are provided.

Under the control of the infrared controller 47, the first to fourth switches 61 to 64 are switched in accordance with the remote control infrared signal received by the infrared receiver 34. Here, the first switch 61 and the second switch 62 are connected in parallel at a connection point P1, and the third switch 63 and the fourth switch 64 are connected in parallel at a connection point P2.

The forced switching relay 65 includes an excitation coil 65a disposed between the reverse signal input terminal 39a and the ground potential, and a first excitation coil 65a which is excited by the excitation coil 65a.
Is provided with an induction switching contact 65b for switching the matrix control unit 54 between a connection point P1 of the first switch 61 and the second switch 62 and a rear video input terminal 32 to which a video signal outside the vehicle is input. , Induction switching contact 6
5b, when the first matrix control unit 54 is connected to the connection point P1 in the initial state to input desired video information such as a TV video or a car navigation image, and a reverse signal is supplied to the reverse signal input terminal 39a. ,
When the excitation coil 65a electromagnetically excites, the induction switching contact 6
5b is switched, and the first matrix control unit 54 is connected to the rear video input terminal 32 to input a rear video signal outside the automobile.

As in the first embodiment, the location of the vehicle information display device is the same as that of the first embodiment, for example, between the front seat 12 and the rear seat 13 of a one-box car or an RV (recreational vehicle) vehicle. Placed between.

The other structure, for example, the appearance of the control unit 16 is the same as that of the first embodiment shown in FIG.

In the above information display apparatus for a vehicle, first, when the driver sets the gear change lever to a mode other than the reverse mode (for example, a forward mode such as "first speed" to "third speed" or "neutral"). (Normal time)
In the state where no reverse signal is given, no current flows through the excitation coil 65a.
Sets the first matrix control unit 54 to the first state in the initial state.
Is maintained in a state of being connected to the connection point P1 between the switch 61 and the second switch 62. In addition, the first to fourth switches 6
1 to 64 are set to the desired information content given to the infrared light receiving unit 34 by remote control using an infrared signal.
4 and 55, the matrix control unit 5
The same image is displayed on both liquid crystal display panels 51 and 52 in accordance with the drive control of the liquid crystal display panels 4 and 55. The speaker 37 outputs a sound related to the desired information.

On the other hand, when the driver changes the gear change lever to the back mode in order to perform the backward traveling operation, a reverse signal is supplied to the reverse signal input terminal 39a, and accordingly, a current is supplied to the excitation coil 65a. The flow switching switch 65b switches the connection of the first matrix control unit 54 from the connection point P1 to the rear video input terminal 32 side. As a result, the front side F of the display 14
The first liquid crystal display panel 51 of w displays the video signal of the rear of the outside of the vehicle given from the rear video input terminal 32.

As described above, when the gear change lever of the vehicle is set to the back mode, the rear image of the outside of the vehicle is forcibly displayed on the front of the display 14 disposed behind the driver. In the same manner as in the first embodiment, the display display 1 is maintained in a posture that looks back in the same manner as in the situation where the driver directly checks the rearward direction.
4 can be visually recognized.

At this time, since the control of each pixel in the liquid crystal display panels 51 and 52 is performed separately for each of the liquid crystal display panels 51 and 52, the main scanning direction is reversed left and right as in the first embodiment. No need to switch orientation.

Further, even while the driver is visually recognizing the rear image of the outside of the vehicle displayed on the front of the display 14, a desired image such as a TV image or a car navigation image is displayed on the rear of the display 14. For example, the degree of freedom of the combination of information display contents on the front and rear surfaces of the display 14 is increased as compared with the first embodiment.

In this case, since the back light 53 is shared by the two liquid crystal display panels 51 and 52, the number of members can be reduced.

In the above embodiment, the display 14 is suspended from the interior of the ceiling of the automobile, but may be arranged between the front seat 12 (including the driver's seat 11) and the rear seat 13. It is sufficient that the console box is erected from the rear end of the console box at the seat.

[0055]

According to the first to third aspects of the present invention, a display having a display surface in both front and rear directions is arranged between a front seat and a rear seat in an automobile, and if necessary, a display is provided. Since the scanning direction is switched by the control unit, visual recognition from both the front and rear is possible, and the display can be effectively used for various purposes, which is convenient.

According to the fourth aspect of the present invention, since the backlight is shared by both liquid crystal display panels, the number of members can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a display of an information display device for a vehicle according to a first embodiment of the present invention is mounted in a vehicle cabin.

FIG. 2 is a schematic diagram showing a display of the vehicle information display device according to the first embodiment of the present invention.

FIG. 3 is an external perspective view showing a control unit of the vehicle information display device according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a state in which a display unit and a control unit of the vehicle information display device according to the first embodiment of the present invention are connected.

FIG. 5 is a schematic diagram showing a display of an information display device for a vehicle according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a state in which a display unit and a control unit of an automobile information display device according to a second embodiment of the present invention are connected.

FIG. 7 is a view showing an arrangement state of a conventional vehicle information display device in a vehicle interior.

[Explanation of symbols]

 Reference Signs List 12 front seat 13 rear seat 14 display display 15 hinge member 16 control unit 21 EL display element 23, 24 liquid crystal panel for shutter 25 first transparent electrode layer 26 organic light emitting layer 27 second transparent electrode layer 30 main body case 31 antenna Connection terminal 32 Rear video input terminal 33 Display output terminal 34 Infrared light receiving unit 35 External audio input terminal 36 External video input terminal 37 Speaker 39a Reverse signal input terminal 39b Illumination signal input terminal 39c Power connection terminal 39d Ground connection terminal 41 Reception Tuner 42 Matrix controller 43 First three-terminal selector switch 44 Output amplifier 45 Variable resistor 46 Second three-terminal selector switch 47 Infrared controller 48 Liquid crystal selector switch 48a Excitation coil 48b Induction switching contact 51, 52 Liquid crystal display panel 3 backlighting 54,55 matrix controller 61-64 first to fourth switches 65 forced switch relay 65a excitation coil 65b induced switching contact

Claims (4)

[Claims] 1. A self-luminous display having a display surface in both front and rear directions and disposed between a front seat and a rear seat in an automobile, and a control unit for controlling a display image of the display. The information display device for a vehicle, wherein the control unit has a function of switching a scanning direction of the display display from left to right in response to a signal from a vehicle. 2. The information display device for a vehicle according to claim 1, wherein optical shutters for shielding light in accordance with control from the control unit are provided on both front and rear surfaces of the display. Automotive information display device. 3. The information display device for a vehicle according to claim 2, wherein the control unit switches a scanning direction of the display display to left or right according to a predetermined signal from the vehicle, and switches the scanning direction between front and rear. An information display apparatus for an automobile, wherein predetermined information is displayed on one of the surfaces, and a function of controlling the optical shutter provided on the other one of the front and rear surfaces to block light is provided. 4. A self-luminous display having a display surface in both front and rear directions and disposed between a front seat and a rear seat in an automobile, and a control unit for controlling a display image of the display. The display device has a front liquid crystal display panel facing a front side and a rear liquid crystal display panel facing a rear side arranged opposite to each other, and a common backlight is arranged between the two liquid crystal display panels. An information display device for a vehicle, characterized by the following.