JPH02147446A - Car-mounted image displaying device - Google Patents

Abstract

PURPOSE:To know the advancing direction of a moving element irrespective of a direction indicator while watching a display by equipping a means to sense the speed, a means to sense the steering angle, a means to photograph the road situation, and a signal processing means to process the sensing information and picture information. CONSTITUTION:When the speed information given by a speed sensor 104 and the steering angle information given by a steering angle sensor 105 allow a signal processing circuit 102 to judge a condition that the moving element concerned is running straight or near thereto, the image signal given by a picture information source 101 is passed to a display 103 as it is. If by contrast the signal processing circuit 102 has judged that the moving element is changing the course, the signal processing circuit 102 calculates the centrifugal force applied to the moving element on the basis of the abovementioned speed information and steering angle information, and the image signal given by the picture information source 101 undergoes image processing, wherein the image is inclined in the direction of steering angle in an angle corresponding to the centrifugal force, and this image signal is passed to the display 103.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image display function of a television receiver.
In particular, the present invention relates to an image display device suitable for 4L mounting.

[Conventional technology]

In conventional in-vehicle image display devices, as a means for recognizing the moving direction of the vehicle, I9! A means for displaying the direction of travel in conjunction with a direction indicator is used in the image display portion, which has an elongated aspect ratio compared to a sub-sized CRT.

[Problem to be solved by the invention]

Since the above-mentioned prior art is linked to a turn signal, it does not take into consideration checking the heading direction of the vehicle while watching the display in a moving state where a turn signal is not required.

An object of the present invention is to provide an image display device for an ICE 4M, in contrast to the above-mentioned prior art, which allows the user to know the traveling direction of a moving body while watching the display and independent of the direction indicator.

[Means to solve the problem]

The above purposes are: - A means for detecting the speed of a vehicle, a means for detecting the steering angle of a steering device, a means for capturing an image of the road situation in front or behind the vehicle, and a means for capturing detection information and image information of hands etc. This is achieved by providing a signal processing means for processing.

[Effect]

Based on the detection signals from the speed detecting means and the steering angle detecting means, the signal processing means composes an image signal corresponding to the traveling direction of the moving object and displays it on a display, or displays the road condition in the traveling direction of the vehicle on the display. Therefore, when using the system, it is possible to predict the moving direction of the moving object while watching the display and take appropriate action, which improves safety and reduces discomfort.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1(α) is an example of a block diagram of an image display device for a moving body embodying the present invention. In addition, Fig. 1(b), (Q
) is an explanatory diagram of FIG. 1 (α).

101 is an image information source, 102 is a signal processing circuit, -3 is a display, 104 is a speed sensor, and 105 is a steering angle sensor.

Based on the speed information obtained by the speed sensor 104 and the steering angle information obtained by the steering angle sensor 105, the signal processing circuit 102 determines whether the moving object is moving straight, almost straight, or changing course, and determines whether the moving object is moving straight. If the signal processing circuit 102 determines that the vehicle is moving almost straight, the video signal obtained from the single image information source 101 is output as is to the display 103. An example of a video is shown in FIG. 1(b).

On the other hand, if the signal processing circuit 102 determines that the moving object is changing course, the signal processing circuit 102 uses the speed information obtained from the speed sensor 104 and the steering angle information obtained from the steering angle sensor 105. The centrifugal force applied to the moving body is calculated, image processing is performed on the video signal obtained from the image information source 101, the image is tilted in the direction of the steering angle by an angle corresponding to the centrifugal force, and the video signal is displayed on the display 103. Output. An example of the image is shown in FIG. 1(c).

According to this embodiment, it is possible to visually and tactilely recognize the centrifugal force that is applied when a moving object changes direction or course, while looking at the display screen, predicts the displacement of the body due to centrifugal force, etc., and also detects the centrifugal force. This improves safety and reduces discomfort.

FIG. 2 shows an embodiment of the signal processing circuit 102 shown in FIG. 1 (α). 201, 207, 208 are input terminals, 202
is an analog/digital conversion circuit (ADC), 20
3 is an image memory, 204 is a digital/analog conversion circuit (DAC), 205 is an address control circuit, 206 is an arithmetic circuit, and 207 is an output terminal. The output signal of the image information source 101 shown in FIG. Next, input terminal 207
The output signal of the speed sensor 104 shown in FIG.
), and the calculation circuit 206 determines whether the moving object is moving straight, almost straight, or changing course, calculates the centrifugal force applied to the moving object, and calculates the steering angle. The direction is identified and this information is output to the address control circuit 205. The address control circuit generates a read address according to the centrifugal force and steering angle direction, outputs oblique projection image data from the image memory 203, converts it into an analog signal by the DAC 204, and outputs it from the output terminal 209.

The third @ is another example of a block diagram of an image display device for a moving body implementing the present invention. The same reference numerals as in FIG. 1 (α) indicate the same functions.

301 is a negative slope input device.

The difference from FIG. 1 is that the slope of the image output to the display 103 is not determined based on speed information or steering angle information, but is arbitrarily set using a negative slope input device 301.

According to this embodiment, since the image displayed on the display can be tilted at any angle, the installation direction of the display and the posture of the viewer can be freely determined.

FIG. 4 (tL) is another example of a block diagram of an image display device for a moving body implementing the present invention. Also, Fig. 4(b),
is an explanatory diagram of No. 411(a). The same reference numerals as the 1st m (cL) indicate the same functions.

401 is a control device, and 402 is a display support device.

Based on the speed information obtained by the speed sensor 104 and the steering angle information obtained by the steering angle sensor 105, the control device 401 determines whether the moving object is moving straight or almost straight, or changing course, and determines whether the moving object is moving straight or almost straight. If the control device 1401 determines that the vehicle is moving almost straight, it controls the display support device 402 so that the display is in a fixed state. On the other hand, the control device I!
When the control device 401 determines that the moving object is changing course, the control device 4 uses the speed information obtained from the speed sensor 104 and the steering angle information obtained from the steering angle sensor 105.
In step 01, the centrifugal force applied to the moving body is calculated, and as shown in FIG. Control the display support device.

According to this embodiment, it is possible to visually and tactilely recognize the centrifugal force that is applied when a moving object changes its direction or course while looking at the display screen, predict the displacement of the body due to centrifugal force, etc., and also detect the centrifugal force. Improving safety by making it possible to respond to
L and discomfort can be reduced.

FIG. 5 (mouth) is another example of FIG. 4 (α). FIG. 5(b) is an explanatory diagram of FIG. 5(α). The same symbols as in FIG. 1(a) indicate the same functions.

501 is a control device, 502 is a seat support device, and 503 is a seat.

The difference from FIG. 4 is that when the control device 501 determines that the moving object is changing course, the seat 503 is moved by an angle corresponding to the centrifugal force in the direction of the steering angle, as shown in FIG. 5(b). The control device 501 controls the seat support device 502 so that the seat support device 502 tilts.

According to this embodiment, similarly to the embodiment shown in FIG. 4, the centrifugal force applied when changing the moving direction or course of a moving body can be visually and 2-sensibly recognized while looking at the display.

It is possible to predict the displacement of the body caused by centrifugal force, etc., and to respond to centrifugal force, thereby improving safety and reducing discomfort.

FIG. 6 shows still another embodiment of FIG. 4(a). The same reference numerals as in FIG. 1 (α), FIG. 4 (α), and FIG. 5 (α) indicate the same functions.

601 is a control device.

The difference from FIG. 4 is that when the control device 601 determines that the moving object is changing course, the display 103 is moved by the display support device 402 in the steering direction by an angle corresponding to the centrifugal force.
The control device 601 controls the display support device 402 so that the display support device 402 tilts, and at the same time, the control device 6 controls the seat support device 502 so that the seat support device 502 tilts the seat 503 in the steering direction by an angle corresponding to the centrifugal force. That's a thing.

According to this embodiment, similar to the embodiment shown in FIG. 4, the centrifugal force applied when changing the moving direction or course of a moving body can be visually and tactually recognized while looking at the display, and the centrifugal force caused by centrifugal force etc. along with predicting the displacement of.

Since it is possible to deal with centrifugal force, safety is improved and discomfort is reduced.

FIG. 7 is another example of a block diagram of an image display device for a moving body embodying the present invention. The same reference numerals as in FIG. 1 (α) indicate the same functions.

701 is a TV tuner, 702 is an electric field strength sensor, 7
03 is a control device, 704 is an antenna support device, and 705 is an antenna.

The radio waves received by the antenna 705 are sent to the TV tuner 701.
and outputs the TV image to the display 103.

On the other hand, based on the electric field strength information horizontally compared by the TII field strength sensor 702, the control circuit 703 controls the antenna support part 703 so that the antenna 705 always faces the maximum electric field direction.

Furthermore, if the electric field strength suddenly changes due to a sudden change in course of the moving object, the displacement in the moving direction of the moving object is controlled using the speed end axis obtained from the speed sensor 104 and the steering angle information obtained from the 8 & steering angle sensor 105. The circuit 703 calculates
The antenna support section 704 is controlled so that the antenna direction does not deviate from the maximum electric field strength direction.

According to this embodiment, stable TV broadcast reception is possible even when the moving object changes course.

Another embodiment of the invention is shown in FIG. In the same figure, the first
The same parts as those in the figures are given the same symbols and their explanations are omitted. 80
1 is a signal control circuit, and 802 is a television camera.

Image signals from an image information source 101 and a television camera 802 are switched in a time-division manner by a signal control circuit 801, and input to a display 103 for display. In this case, the image information source 101 is a source of television broadcast or video playback images, and the television camera 802 images the road condition in front or behind the width of the river. Signal control circuit 801
Now, these two systems of image signals are controlled such that they are output alternately at certain time intervals, and displayed on the display. This makes it possible to grasp the road situation in the direction in which the vehicle is traveling, even when the user is looking at the display, making it possible to predict and respond to body displacement caused by centrifugal force, etc., thereby improving safety and preventing accidents. Pleasure is reduced.

Furthermore, the signal control circuit 801 controls one of the image signals when it is important to understand the road condition, such as when the vehicle is reversing, or when it is important to display television broadcasts or video playback images, such as when the vehicle is stopped. It also has the function of outputting only the information and displaying it on the display, which further improves safety and allows operation as a normal display.

FIG. 9 shows an embodiment of the signal control circuit 801 shown in FIG. In the figure, 901 is an input terminal from an image information source, 902 is an input terminal from a television camera, 903 is a synchronization signal output terminal, 904 is a synchronization separation circuit, 905 is a signal switching circuit, 906 is a control circuit, and 907 is a synchronization signal output terminal. This is an image signal output terminal to the display.

A synchronization separation circuit 904 extracts a synchronization signal from the image signal from the image information source input to the input terminal 901, and transmits the synchronization signal from the synchronization signal output terminal 903 to the television camera.
The other signal is input to the control circuit 906.

Thereby, the synchronization of the image of the television camera is made to match the synchronization of the image information source, and when the signal switching circuit 905 switches the signal, synchronization errors on the display are suppressed. Further, a switching control circuit 906 counts synchronizing pulses and outputs switching signals to the switching circuit 905 at desired time intervals. The signal selected by this switching is output from the output terminal 907 to the display.

The control circuit 906 also has a function of fixing the state of the switching circuit 905 to one side by applying a control signal from the outside. An example of an external control signal is a forced switching signal from a simple switch.

There is a signal that is emitted in conjunction with reverse gear.

In this embodiment, in addition to the same effects as the embodiment shown in FIG. 8, the above-mentioned functions make it possible to improve the safety of the negative layer and improve the usability.

Another embodiment of the invention is shown in FIG. In the same figure,
The same parts as in FIG. 1 and FIG. 8 are given the same symbols and explanations are omitted. 1001 is a g processing circuit.

An image signal from the image information source 101 and an image signal from the television camera 802 are input to the signal processing circuit 1001 .

At the same time, detection information from the speed sensor 104 and the steering angle sensor is also input. The signal processing circuit 1001 processes the detection information from these sensors, selects one of the two image signals, and displays it on the display 103.

In this case as well, as in the embodiment shown in FIG. By varying the interval based on the detection signal from the speed sensor, and by displaying only the road condition image from the television camera 802 on the display when the steering angle exceeds a predetermined value based on the detection signal from the steering angle sensor, the vehicle's direction of travel can be adjusted. The reliability of understanding road conditions can be increased. This makes it possible to predict and respond to body displacement caused by centrifugal force, etc., thereby improving safety and reducing discomfort.

FIG. 11 shows an embodiment of the signal processing circuit tool shown in FIG. 10. In this figure, the same parts as in FIGS. 1 and 9 are given the same symbols and their explanations will be omitted. 11O1 is a control circuit.

The synchronization separation circuit 904 extracts a synchronization signal from the image signal from the input terminal 901/\ inputted image information source, and outputs the synchronization signal to the television camera from the synchronization signal output terminal 903 on one side and connects it to the image information source. The synchronization is made consistent, and the other is input to the control circuit 1101, which counts synchronization pulses and outputs a switching signal to the switching circuit 905 at a desired time interval. On the other hand, detection signals from the speed sensor 104 and the steering angle sensor 105 are input to the control circuit 1101, and calculations are performed according to the speed and steering angle to change the time interval at which the switching signal is output.

For example, if the speed increases, the time interval can be shortened to increase the reliability of understanding the road situation.

Further, when the steering angle exceeds a certain value, a similar effect can be obtained by controlling to display only the image from the television camera.

Furthermore, similar to the embodiment shown in FIG. 9, the control circuit 11
A control signal can also be applied to 01 from the outside, and the switch circuit 905 also has the function of fixing the switching circuit 905 in an arbitrary state using the control signal.

This embodiment has the same effects as the embodiment shown in FIG. 1O, and furthermore, the above-mentioned functions improve the safety of the negative layer and improve the usability.

Another embodiment of the invention is shown in FIG. The same parts as in FIGS. 1 and 8 are designated by the same reference numerals as in FIGS. 1 and 8, and description thereof will be omitted.

1201 is a video switch that switches between a video signal from the image information source 101 and a video signal from the television camera 802; 1202 is a speed sensor 104 and a steering angle sensor 10;
This is a control circuit that switches the video switch 1201 according to the amount of signal from the video switch 1201.

A video signal of image information @1g1o+ mounted on a moving vehicle or the like normally passes through the video switch 1201 and is displayed on the display 103 when a change occurs in the behavior of the vehicle, such as when turning right or left at a curve or intersection. In this case, the output signals of the speed sensor 104 and the steering angle sensor 105 also change.

The control circuit 1202 calculates changes in the signal amounts from the speed sensor 1.04 and the steering angle sensor 105, and outputs a control signal to switch the video switch 1201 when the behavior change exceeds a certain value. When the video switch 1201 is switched, an image from a television camera 802 monitoring the surroundings of the vehicle is displayed on the display 103.

According to this embodiment, it is possible to know changes in the vehicle's behavior and the surrounding situation while looking at the display screen.

Another embodiment of the invention is shown in FIG. Figures 1 to 12
The same parts as those in the figures are given the same reference numerals and explanations are omitted.

1301 is an image memory that stores information for one screen of the image information source 101; 1302 is an image memory J3 that stores information on one screen of the image information source 101;
This is a control circuit that varies the read timing of 01 and the switching timing of the video switch 1201.

The image memory 1301 reduces and outputs one screen of the image information source 1 using a method that increases the read speed compared to the write speed. The video signal of the reduced screen is inserted into the video signal of the television camera 802 during the period selected by the video switch 1201, and is displayed on the display 1.
03, a reduced screen of the image information source 101 is displayed with the image captured by the television camera 802 as the background.

A control circuit 1302 controls the reading start point of the image memory 13 and the switching timing of the video switch 1201 in accordance with detection signals from the speed sensor 104 and the steering angle sensor 105 of the vehicle in which the present invention is installed. That is, if the vehicle is moving straight ahead.

Image information? The reduced screen of FX101 is Display 103
As shown near the center above, a control circuit 1302 controls the read timing of the image memory 1301 and the switching timing of the video switch 1201.

When the vehicle changes from going straight to turning right or turning left, the control circuit 1302 detects a change in the vehicle's behavior based on the detection signals from the speed sensor 104 and the S steering angle sensor 105, and the reduced screen on the display 103 displays a right turn. The switching timing of the image memo IJ 1301 and the video switch 1201 is controlled so that the vehicle gradually moves to the left when turning left, gradually moves to the right when turning left, and returns to the center when returning to the straight-ahead state.

According to this embodiment, it is possible to know the situation outside the vehicle while viewing images such as TV broadcasts using a single display mounted on the vehicle, and by changing the display position of images such as TV broadcasts, it is possible to know the situation outside the vehicle. Changes in behavior can be detected.

Another embodiment of the invention is shown in FIG. Figures 1 to 13
The same parts as those in the figures are given the same reference numerals and explanations are omitted.

1401 is a horizontal display with an aspect ratio of 3:8 compared to the normal 3:4 aspect ratio, and 1402 is an image information source 10.
An image memory 1403 stores one screen of the image memory 1402 and the video switch 12.
This is a control circuit that controls the switching timing of 01.

In a vehicle equipped with the present invention, a television camera 802
monitors the situation outside the vehicle, such as the scenery in front of the vehicle, and displays a photographed image on the display 1401 when the video switch 1201 is on the television camera 802 side.

On the other hand, the video signal of the image information source 101 is temporarily transferred to the image memory 1.
402, but if the read speed from the image memory 1402 is twice the write speed, one horizontal scan worth of video can be written in one half of one horizontal scan period. If the reading is stopped for the remaining 1/2 of the time, the image signal is converted into a video signal whose width is reduced by 1/2 in the horizontal direction. When the video switch 1201 is switched to the memory side while the image information is being read from the image memory 1402, the image from the image information @101 is displayed on one half of the display 1401 in the horizontal direction.

A control circuit 1403 detects the behavior of the vehicle from detection signals from a vehicle speed sensor 104 and a steering angle sensor 105, and displays an image so that the image from the image information source 101 is displayed near the center of the display 1401 when the vehicle is traveling straight. Read timing of memory 1402 and video switch 1
The switching timing of 201 is controlled.

Furthermore, when it is detected that the vehicle is turning right or turning left, the image information source 10
The reading timing of the image memory 1402 and the switching timing of the video switch 1201 are controlled so that the video of one image moves left and right on the display 1401. 1° According to this embodiment, the screen of 1 image information g 101 has an aspect ratio of 3:4 and can be viewed without any discomfort compared to a normal screen, and at the same time, the situation outside the vehicle can be constantly monitored.

Changes in the vehicle's heading, such as turning left or right, can also be visually recognized by moving the screen.

Another embodiment of the invention is shown in FIG. Figures 1 to 14
The same parts as those in the figures are given the same reference numerals and explanations are omitted.

15aL-1503 is a display, 1504 respectively
- 1507 are TV cameras, and 1508 selects images from the images of the image information source 101 and the images of the TV cameras 1504-1507, and displays them on three displays 1501-1.
A video switcher 11509 that distributes to the vehicle traveling direction detecting means 1510 is a video switcher 1
This is a control circuit that controls 508.

TV camera 1504 is located in front of the vehicle, TV camera 15
05 is photographing the left side of the vehicle, a television camera 1506 is photographing the right side of the vehicle, and a television camera 1507 is photographing the rear of the vehicle.

Control circuit 1510 switches the screens displayed on displays 1501 to 1503 by means of video switcher 1508 in accordance with information from traveling direction detection means 1509.

If the vehicle is traveling straight, the left side is shown on the display 1501, and the image information source 101 is shown on the display 1502.
The image on the right side is displayed on the display 1503. When the vehicle turns right, the image information source 10
1 is displayed on display 1501, and the display on display 1502 is the front image, display 1.
The display on 503 switches to the image on the right side. When the vehicle turns left, the display on the display 1501 switches to the left side image, the display on the display 1502 switches to the front image, and the display on the display 1503 switches to the image of the image information source 101.

Also, when the vehicle is in reverse, the display 150
The display on display 1502 is switched to the left side image, the display on display 1502 is switched to the rear side image, and the display on display 1503 is switched to the right side image.

According to this embodiment, the situation outside the vehicle can be constantly monitored at the same time as images such as TV broadcasts. It also depicts changes in the vehicle's direction of travel,
It can be visually recognized by the switching of faces. Furthermore, visibility of blind spots of the vehicle can be improved.

〔Effect of the invention〕

According to the present invention, in an image display system used in a moving body such as a vehicle, the traveling direction of the moving body can be recognized while watching the displayed image, and the displacement of the body due to centrifugal force etc. can be predicted. This has the effect of improving safety and reducing discomfort.

[Brief explanation of the drawing]

FIG. 1(α) is a block diagram showing one embodiment of the present invention, and FIGS. 1(b) and (c) are schematic diagrams for explaining the same. 2 and 3 are block diagrams showing other embodiments of the present invention, FIG. 4(α) and FIG. 5(α) are block diagrams showing other embodiments of the present invention, and FIG. b) Figure 5(b) is a schematic diagram, Figures 6, 7, and 8. FIG. 9, FIG. 10, FIG. 11, FIG. 12, FIG. 13, FIG. 14, and FIG. 15 are block diagrams showing other embodiments of the present invention, respectively. 101... Image information source, 102... Signal processing circuit,
103... Display, 104... Speed sensor,
105... Steering angle sensor, 203... Image memory,
205...Address control circuit. 2nd Akira Ward (α) 4th Eye ((2) Akira 5 Concave ((2) Akira σ Usu Cb) Akira ≦ Akira 71 i0 1 θ Tomoe No. 7 Akira 7 Kokugaku / 1 country No. 72 Kuni Kabuto 15 Koshikoko 74 ni Akira/JKyoulρ4

Claims (1)

[Scope of Claims] 1. A video signal generation section installed in a vehicle interior, an image display section, information representing the driving situation of the vehicle, and a video signal from the video signal generation section are inputted, and the video signal is inputted thereto. 1. A vehicle-mounted image display device comprising: a signal processing unit that performs signal processing according to driving conditions on the image display unit to tilt and display a screen in accordance with driving conditions. 2. In the in-vehicle image display device according to claim 1, the signal processing circuit inputs detection information of a rotation angle of a steering wheel shaft of the automobile and speed detection information of the automobile as information representing the driving situation of the automobile. An on-vehicle image display device comprising a circuit that determines by calculation the tilt angle of the screen displayed on the image display section. 3. The in-vehicle image display device according to claim 1, wherein the video signal generation section includes a video camera that captures an image of the outside of the vehicle, and a television reception image generation source, and the signal processing circuit includes a video camera that captures an image of the outside of the vehicle. (hereinafter sometimes referred to as the first video signal) and a video signal from the television reception image source (hereinafter sometimes referred to as the second video signal) are input, and both are time-divided. An in-vehicle image display device comprising an output circuit. 4. The in-vehicle image display device according to claim 3, wherein the video signal processing circuit includes a synchronization separator that receives the first video signal and separates a vertical synchronization signal therefrom;
a switching unit that switches and outputs the first video signal and the second video signal; and a switching unit that synchronizes the first video signal and the second video signal by controlling switching timing using the separated synchronization signal and also provides vertical return. An in-vehicle image display device comprising: a control unit that performs the switching within a line period. 5. The in-vehicle image display device according to claim 3, wherein the video signal processing circuit includes a synchronization separator that receives the first video signal and separates a vertical synchronization signal therefrom;
a switching unit that switches and outputs a first video signal and a second video signal; and inputs detection information of a rotation angle of a steering wheel shaft of a car and speed detection information of a car, whereby the first video signal and the switching timing of the second video signal, and when switching,
A control unit that synchronizes the first video signal and the second video signal by controlling switching timing using the separated synchronization signal and causes the switching to be performed within a vertical retrace period. In-vehicle image display device. 6. A video signal generation unit installed in the vehicle interior, a horizontally elongated image monitor display unit, and a video signal from the video signal generation unit that is processed and displayed on the image monitor display unit; a signal processing section that changes a display area of a video signal on an image monitor display section in response to input of rotation angle detection information and vehicle speed detection information. Display device. 7. A video camera installed inside a car to image the outside of the car, a television reception image generation source, and an image monitor display unit;
processing the video signals from the video camera and the television received image source and displaying them on the image monitor display section;
At that time, a video signal from the video camera (first video signal) and a video signal from the television reception image source (second video signal) are used.
1. A vehicle-mounted image display device comprising: a signal processing section configured to display an image by arranging one of the image display areas of the video signal in the other image display area. 8. The in-vehicle image display device according to claim 7, wherein the signal processing circuit is inputted with detection information of the rotation angle of the steering wheel shaft of the vehicle and speed detection information of the vehicle, thereby controlling the image display area of the vehicle. An in-vehicle image display device comprising a circuit that changes the position of a smaller image display area.