JP2007072783A - Signal information display system and vehicle speed control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal information display system capable of easily evading the entry of a vehicle to a dilemma area and enabling the safe travel of the vehicle, and a vehicle speed control system. <P>SOLUTION: This signal information display system comprises: a reception part 2 for acquiring the lighting information of a signal in front from the outside of an automobile; a position information acquisition part 322 for acquiring the position information of the signal with respect to the automobile; a vehicle speed input part 31 for recognizing the vehicle speed of the automobile A; and a computing part 33 for calculating the position information of an yellow area and a red area which are areas on a road where the lighting color of the signal becomes yellow and red when the automobile A advances at the vehicle speed recognized by the vehicle speed input part 31. A driver can recognize the position information of the yellow area and the red area by a head-up display 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traffic signal information display system that provides a vehicle driver with traffic signal information for safely driving a vehicle such as an automobile, and a vehicle speed control system for making the vehicle safe.

When a vehicle such as an automobile is traveling toward an intersection with a traffic light, the vehicle may enter a so-called “dilemma area”. This dilemma area means that before the vehicle enters the intersection, the signal changes from blue to yellow, so it cannot be safely stopped at the stop line at normal deceleration, and before it becomes a red signal. A temporal / spatial area where you cannot enter an intersection. When the vehicle enters such a dilemma area, the driver must immediately determine whether to stop or pass as it is, and the possibility of making an erroneous determination increases. For this reason, it is not preferable for safety that the vehicle enters the dilemma region.
Here, if the driver knows when the front traffic light turns red, the vehicle speed can be adjusted with a margin before entering the intersection, and the driver enters the dilemma area. It can be avoided in advance.
Therefore, a traffic light has been proposed in which a plurality of lamps are attached and the driver recognizes the lighting time of the traffic light (timing at which the lighting color of the traffic light is switched) when these lamps are lit (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-353585 (FIGS. 1 and 2)

In the above-described conventional example, the driver adjusts the vehicle speed so as not to enter the dilemma area in accordance with the timing when the lighting color of the traffic light in front changes. However, since the driver himself / herself adjusts the vehicle speed, a driver who is not skilled in driving operation sometimes enters the dilemma region.
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a traffic signal information display system and a vehicle speed control system in which a driver can easily avoid a dilemma region and can realize safe traveling.

  The present invention is a traffic signal information display system mounted on a vehicle, and includes lighting information acquisition means for acquiring lighting information of a traffic signal ahead from the outside of the vehicle, and positional information for acquiring position information of the traffic signal with respect to the vehicle. An acquisition means, a vehicle speed grasping means for grasping the vehicle speed of the vehicle, and an area on the road where the lighting color of the traffic light becomes a predetermined color when the vehicle travels at the vehicle speed grasped by the vehicle speed grasping means. Calculation means for calculating the position information of the predetermined color area based on the lighting information and the traffic signal position information for at least two types of predetermined colors, and a display for allowing the driver to recognize the position information of the predetermined color area Means.

  According to the traffic signal information display system configured as described above, the driver can recognize a predetermined color area on the road for at least two types of lighting colors until the vehicle reaches the traffic signal ahead. Therefore, the driver can judge whether the vehicle is stopped or passed by the traffic light with sufficient margin, and the vehicle speed can be adjusted with sufficient margin from the front of the traffic signal, so that the vehicle avoids the dilemma area. Can easily do that.

  The position information acquisition means preferably includes position detection means for detecting the position of the vehicle, and map information storage means for storing map information including the position information of the traffic light. In this case, the position information between the vehicle and the traffic light can be obtained more accurately.

  The display means acquires the road shape visually recognized through the windshield as image information, and corrects the acquired road shape image information to image information of a three-dimensional road shape visually recognized by the driver. Image acquisition means and position information of the predetermined color region are converted into three-dimensional position information when viewed from the driver, and the converted three-dimensional position information and the image acquisition means are acquired. Based on the image information of the three-dimensional road shape, and a superimposing display means for superimposing and displaying on the windshield so that it can be recognized in accordance with the actual road shape visually recognized from the driver through the windshield, It can be provided.

  In the above case, the driver can safely recognize the predetermined color area without taking his eyes off from the front, and the predetermined color area is superimposed on the windshield in accordance with the road shape actually seen by the driver. Therefore, it is easy for the driver to recognize the predetermined color area, and to avoid the dilemma area more easily.

In the traffic signal information display system, when the front traffic signal is the first traffic signal and the traffic signal arranged further forward of the first traffic signal is the second traffic signal, the vehicle uses the first traffic signal. If it is determined whether or not the vehicle has passed, the position information of the predetermined color region to be recognized by the driver by the display means is obtained from the position information of the predetermined color region of the first traffic light. A switch display means may be further provided for switching to the position information of the predetermined color area of the second traffic light and for allowing the driver to recognize that the position information of the predetermined color area of the second traffic light has been switched.
In this case, even when the position information of the predetermined color area of the first traffic light and the position information of the predetermined color area of the second traffic light intersect, the driver is given the first traffic light which is the latest traffic light. Until it passes, information on the first traffic light is displayed and information on the second traffic light is not displayed. Furthermore, since the driver recognizes that the display information has been switched when passing through the first traffic light and switching to the information of the second traffic light, the driver U is confused about the displayed traffic signal information. Can be prevented.

  Further, the present invention is a vehicle speed control system that is mounted on a vehicle and controls the vehicle speed thereof, and includes lighting information acquisition means for acquiring lighting information of a traffic signal ahead from the outside of the vehicle, and position information of the traffic signal with respect to the vehicle. Position information acquisition means for acquiring the vehicle speed, vehicle speed grasping means for grasping the vehicle speed of the vehicle, and when the vehicle travels at the vehicle speed grasped by the vehicle speed grasping means, the lighting color of the traffic light becomes yellow and red Calculating means for calculating the position information of the yellow area and the red area, which are areas on the road, based on the lighting information and the position information; and the position of the traffic light is located in the yellow area or the red area. If the position of the traffic light is determined to be within the yellow region or the red region, the boundary between the yellow region and the red region is the signal. A deceleration calculation means for calculating a deceleration to decelerate the vehicle to match the position of the machine, it is characterized in that the vehicle speed of the vehicle equipped with a vehicle speed control means for controlling on the basis of the deceleration.

  According to the vehicle speed control system configured as described above, when it is determined that the position of the traffic signal is in the yellow region or the red region, it is determined that the vehicle cannot pass the traffic signal with the lighting color being blue. To do. In this case, the vehicle can be decelerated with the deceleration at which the vehicle can stop at the position of the traffic light at the timing when the lighting color is switched from yellow to red by the deceleration determination means and the vehicle speed control means. Therefore, it is possible to reliably avoid the vehicle from entering the dilemma region regardless of the skill level of the driving operation of the driver.

  As described above, according to the traffic signal information display system and the vehicle speed control system according to the present invention, it is possible to easily avoid the vehicle from entering the dilemma region, and thus it is possible to realize safe traveling of the vehicle.

  Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a configuration when the traffic signal information display system according to the first embodiment of the present invention is mounted on an automobile A as a vehicle. This traffic signal information display system is a traffic signal information processing unit 3 to which a receiving unit 2 as a lighting information acquisition unit for acquiring lighting information of a traffic signal K located in front is connected, and when viewed through a windshield G of a car A. It includes a camera 4 that acquires the road shape ahead as image information, and a display processing unit 6 to which a head-up display 5 is connected.

The receiving unit 2 transmits lighting information, such as the current lighting color of the traffic light K and how many seconds later the current lighting color is switched to another color, which is transmitted as a radio wave from the traffic signal information transmitting device 7 provided in the traffic light K. Receive. The traffic signal information transmitting device 7 is within a distance range in which the vehicle A can be safely stopped at a stop line located in front of the traffic signal K when the vehicle A travels at a predetermined speed and approaches the traffic signal K. Send radio waves. That is, in the initial stage when the receiving unit 2 can receive the lighting information, the vehicle A is secured at a distance that can be safely stopped with respect to the traffic light K. For the signal information transmitter device 7 and the receiver 2 described above, for example, DSRC (narrow band radio communication) can be used.
The head-up display 5 is disposed on the dashboard A1 of the automobile A, and displays predetermined information superimposed on the inner surface of the windshield G. The traffic signal information processing unit 3 is connected to a vehicle speed sensor S provided in the automobile A. The display processing unit 6 is connected to the traffic signal information processing unit 3 and performs display processing based on a signal output from the traffic signal information processing unit 3.

  FIG. 2 is a block diagram showing the configuration of the traffic signal information display system. In the figure, a traffic signal information processing unit 3 is connected to a vehicle speed sensor S and is a vehicle speed input unit 31 as vehicle speed grasping means for grasping the vehicle speed of the vehicle A, and positional information of the vehicle A and a traffic light K located in front. And a position information acquisition unit 32 as position information acquisition means for acquiring. Further, the traffic signal information processing unit 3 calculates position information of an area on the road where the lighting color of the traffic signal K is yellow and red when the automobile A travels at the current vehicle speed grasped by the vehicle speed input unit 31. The calculating part 33 is provided as a calculation means. The calculation unit 33 is connected to the reception unit 2, the vehicle speed input unit 31, and the position information acquisition unit 32, which are yellow regions that are regions on the road where the lighting colors of the traffic lights K are yellow and red, And the lighting information of the traffic light K, the vehicle speed of the automobile A, and the distance between the automobile A and the traffic light K necessary for calculating the position information of the red region are output to the calculation unit 33.

  The position information acquisition unit 32 stores a map information including position information of a GPS (global positioning system) 321 as position detecting means for detecting the position of the automobile and a traffic light K (a stop line of the traffic light K). A map information storage device 322 as information storage means. Thus, the position information acquisition unit 32 can more accurately obtain the position information of the position of the automobile A and the traffic light K (the stop line of the traffic light K).

Here, the yellow region and the red region will be described. FIG. 3 is a schematic diagram showing the positional relationship between the traffic light K on the road D and the automobile A.
In the figure, a state in which the automobile A is traveling at a point O toward the traffic light K at a speed V is shown. Assuming that the car A goes straight with the speed V maintained, the traffic light K switches to yellow when the car A reaches the point O1, switches to red when the car A reaches the point O2, and turns blue again when the car A reaches the point O3. It is assumed that it is the timing of lighting color display to be switched.
At this time, a region between the point O and the point O1 is a blue region R1 through which the automobile A passes while the traffic light K is in the blue color. Similarly, the region between the point O1 and the point O2 is a yellow region R2 through which the vehicle A passes in a yellow state, and the region between the point O2 and the point O3 is a red state in an automatic red region R3. is there. In this case, the position information of the yellow region R2 and the red region R3 calculated by the calculation unit 3 is the distance between each of the points O and the points O1 to O3.

Returning to FIG. 2, the position information of the yellow region R <b> 2 and the red region R <b> 3 calculated by the calculation unit 33 is output to the display processing unit 6. The display processing unit 6 includes an image correction unit 61 to which the camera 4 is connected, and a display control unit 62 to which the calculation unit 33 is connected.
The camera 4 outputs the three-dimensional road shape visually recognized through the windshield G (FIG. 1) to the image correction unit 61 as image information. The image correction unit 61 corrects and converts the road shape of the image information output from the camera 4 into image information of a three-dimensional road shape visually recognized by the driver U, and outputs the image information to the display control unit 62. That is, the camera 4 and the image correction unit 61 constitute an image acquisition unit that acquires image information of a three-dimensional road shape visually recognized by the driver U.

Based on the information obtained above, the display control unit 62 displays the position information of the yellow region R2 and the red region R3 on the inner surface of the windshield G by the head-up display 5 connected to the display control unit 62. Superimposed display.
At this time, the display control unit 62 converts the position information of the yellow region R2 and the red region R3 into three-dimensional position information when the driver U visually recognizes the yellow region R2 and the red region R3. Further, the display control unit 62 uses the head-up display 5 to wind the windshield based on the three-dimensional position information and the three-dimensional image information of the road shape shown from the image correction unit 61. The position information of the yellow region R2 and the red region R3 is displayed in the head so that the yellow region R2 and the red region R3 can be shown so as to substantially match the actual road shape visually recognized by the driver U when displayed on G. Output to the up display 5. That is, the display control unit 62 and the head-up display 5 constitute superimposing display means for superimposing and displaying the position information of the yellow region R2 and the red region R3 on the windshield G.

FIG. 4 is a schematic diagram showing a forward view of the driver U of the automobile A in FIG. A region indicated by cross hatching in the figure is a projection image r2 showing a yellow region R2 superimposed on the inner surface of the windshield G by the head-up display 5 (FIG. 1) on the dashboard A1, and is indicated by hatching. Similarly, the region shows a projection image r3 showing a red region R3 superimposed on the inner side surface of the windshield G. The projected image r <b> 2 is transmitted through the windshield G to such an extent that the field of view is not obstructed, and the cross-hatched portion is colored yellow. Similarly, the hatched hatched portion is colored red in the same manner in the projected image r3.
The head-up display 5 superimposes and displays the projected images r2 and r3 on the back surface of the windshield G so as to substantially match the road shape actually seen by the driver U as shown in the figure. That is, the display processing unit 6, the camera 4, and the head-up display 5 constitute display means for displaying the position information of the respective regions R2 and R3 calculated by the traffic signal information processing unit 3, and each of the regions R2 and R3. Is displayed on the windshield G as projected images r2 and r3 in accordance with the actual road shape visually recognized by the driver U, thereby allowing the driver U to recognize the regions R2 and R3.

Next, the position information calculation processing of the yellow region R2 and the red region R3 performed by the traffic signal information display system having the above functions will be described. FIG. 5 is a flowchart of position information calculation processing for each of the regions R2 and R3 that is repeatedly executed in the traffic signal information processing unit 3.
First, in step S1, the traffic signal information processing unit 3 determines whether or not lighting information from the traffic signal K has been received. If the lighting information is not received, the process ends and the process returns to the start, and nothing is displayed on the windshield G. On the other hand, if it is received, the current lighting color of the traffic light, the remaining lighting time, and the lighting time of each lighting color are acquired (step S2). Next, the current vehicle speed of the automobile A output from the vehicle speed input unit 31 is grasped (step S3). Next, the traffic signal information processing unit 3 acquires the current distance between the car A and the traffic signal by the position information acquisition unit 32 (step S4).

  Next, the traffic light information processing unit 3 calculates the position information of the yellow region and the red region from the information acquired in steps S2 to S4 (step S5). Next, the calculated position information of each area is output to the display processing unit 6, and the process returns to the start (step S6). When the position information of each region from step S6 is input to the display processing unit 6, the display processing unit 6 projects the projection images r2 and r3 on the windshield G based on the position information. By repeatedly performing the above processing at high speed, the projection images r2 and r3 projected onto the windshield G for each processing are updated as needed.

FIG. 6 is a schematic diagram illustrating another example of the forward view of the driver U when the projected images r2 and r3 are projected onto the windshield G. From the state in FIG. The state when the automobile A approaches the front signal is shown. In the figure, the projected images r2 and r3 are projected in a range closer to the car A according to the position of the traffic light K. In this case, the vehicle A can make the driver U recognize that it is just before entering the yellow region R2 and immediately before the lighting color of the traffic light K switches from blue to yellow.
Furthermore, if the driver U accelerates / decelerates the automobile A, position information is calculated in the yellow region R2 and the red region R3 according to the accelerated / decelerated speed, and projection images r2, r3 based on the position information are projected. The
As described above, the traffic light information display system is superposed on the windshield G while updating the yellow region R2 and the red region R3 according to the positional relationship between the vehicle A and the traffic light K and the vehicle speed at that time, as needed. indicate. Thus, the driver U can recognize the regions R2 and R3 corresponding to the vehicle speed of the automobile A.

  According to the traffic signal information display system of this embodiment configured as described above, the yellow color R2 and the lighting color on the road D until the vehicle A reaches the traffic signal K ahead of the vehicle A. Since the driver can recognize the red region R3 in which the vehicle turns red, the driver can make a judgment as to whether to stop or pass the vehicle A with the traffic light K, and from the front of the traffic light K. The speed of the automobile A can be adjusted with a margin. Therefore, the automobile A can be easily avoided from entering the so-called dilemma region, and the safe driving of the automobile A can be ensured.

In addition, when a plurality of traffic lights having different lighting color switching timings are arranged in series in the traveling direction of the automobile A, it is conceivable that information of the traffic lights interlaces. In this case, it is only necessary to display only the information on the latest traffic signal and to switch to the display of information on the next traffic signal when passing through the latest traffic signal so that the driver U can recognize it.
That is, if the nearest traffic light is the first traffic light and the traffic light arranged at a predetermined interval in front of the first traffic light is the second traffic light, the vehicle A is immediately before passing through the first traffic light. Displays information on the first traffic light. In other words, even when the position information of the predetermined color area of the first traffic light and the position information of the predetermined color area of the second traffic light intersect, the driver U is given the first traffic light that is the latest traffic light. Until it passes, the information of the second traffic light is not displayed.
Then, when the automobile A passes through the first traffic light, the display is switched to the information display of the second traffic light. At this time, a display for causing the driver U to recognize that the display is switched to the information display of the second traffic light is displayed on the windshield G by the head-up display 5.

As described above, it is determined whether or not the car A has passed the first traffic light. When it is determined that the car A has passed, the display is switched to the information display of the second traffic light and the driver U is made to recognize it. By providing the switching display means for performing the display, the traffic signal information displayed by the driver U can be prevented from being confused.
Whether or not the vehicle has passed the first traffic light can be determined from the position information described above, and the lighting information from the traffic light received by the receiving unit 2 (FIGS. 1 and 2) is usually an automobile. Since A cannot be received when A passes, when the traffic signal information is received immediately after passing through the first traffic light, the received traffic signal information is information on traffic signals other than the first traffic signal. Can be determined. Moreover, when the lighting information from a traffic signal has identification information etc., it can also judge by referring to this.

  In addition, the yellow region R2 and the red region R3 can be recognized by the driver U by displaying them on, for example, a small liquid crystal display device used in a car navigation system or the like. In this case, the driver U needs to move his / her line of sight to the liquid crystal display device and must remove his / her line of sight from the front. On the other hand, if the projection images r2 and r3 indicating the regions R2 and R3 are superimposed on the windshield G as in the present embodiment, the driver U can view the regions R2 and R3 without taking his / her line of sight from the front. Since it can be recognized, safety is further increased. Furthermore, each region R2, R3 can be easily recognized, and the dilemma region can be avoided more easily.

  In this embodiment, a head-up display is used to display the yellow region R2 and the red region R3 on the windshield G. However, for example, by arranging a projector, a projector, or the like behind the windshield G. They may be displayed on the windshield G, and can be used as long as they can be displayed superimposed on the windshield G.

  FIG. 7 is a block diagram of a vehicle speed control system according to the second embodiment of the present invention. The main difference between this embodiment and the first embodiment is whether or not to stop the automobile A based on the position information of the yellow area R2 and the red area R3 obtained from the traffic signal information processing unit 3. If necessary, a deceleration calculation unit 8 that calculates a deceleration for decelerating the automobile A and a vehicle speed control unit 9 are provided. Since other points are the same as those in the first embodiment, description thereof is omitted.

In the figure, the deceleration calculation unit 8 is connected to the traffic signal information processing unit 3 and a vehicle speed sensor S provided in the automobile A. The traffic light K, the position information of the yellow region R2 and the red region R3, and The vehicle speed of the automobile A is output to the deceleration calculation unit 8. Based on these pieces of information, the deceleration calculation unit 8 calculates a deceleration for stopping the automobile A in front of the traffic signal K ahead.
A vehicle speed control unit 9 serving as a vehicle speed control means is connected to a deceleration calculation unit 8 and a vehicle speed sensor S provided in the automobile A. The calculated deceleration and the vehicle speed of the automobile A are respectively obtained from the vehicle. Output to the speed controller 9. The vehicle speed control unit 9 is configured to be able to control the accelerator opening and the brake of the vehicle A without being operated by the driver A. The vehicle speed control unit 9 acquires the speed of the vehicle A from the vehicle speed sensor S, It is configured so that it can be controlled to the deceleration.

FIG. 8 is a flowchart of a process for calculating the deceleration of the automobile A that is repeatedly executed in the deceleration calculation unit 8.
First, in step S21, the deceleration calculation unit 8 determines whether the position information of the yellow region R2 and the red region R3 is output from the traffic signal information processing unit 3 (FIG. 7). If it is determined that this position information is not output, the process ends and the process returns to the start, and the speed of the automobile A is not automatically controlled. On the other hand, when the position information has been output, the deceleration calculation unit 8 outputs the automobile A, the traffic light K (the stop line T of the traffic light K (FIG. 3)), the yellow region R2, and The position information of the red region R3 is acquired (step S22). Next, based on the position information, it is determined whether or not the position of the stop line T of the traffic light K is located in the yellow region R2 or the red region R3 (step S23). If it is determined that the position of the stop line T is outside the areas R2 and R3, the vehicle speed can be passed through the traffic light K with the lighting color being blue if the vehicle is running while maintaining the current vehicle speed. Finishes the process and returns to the start without automatically controlling the speed of the automobile A. On the other hand, when it is determined that the position of the stop line T is within both the regions R2 and R3, when the vehicle travels while maintaining the current vehicle speed, the lighting color changes from blue before the vehicle A reaches the stop line T. Since it turns yellow and cannot pass through the traffic light K in the blue state, the process proceeds to the next step and the vehicle A is decelerated.

In step 24, the deceleration calculation unit 8 grasps the current vehicle speed of the automobile A from the vehicle speed sensor S provided in the automobile A. Next, a deceleration that can make the boundary between the yellow region R2 and the red region R3 coincide with the position of the stop line T is calculated based on the current vehicle speed and the position information (step S25). And the calculated deceleration is output to the vehicle speed control part 9 (FIG. 7), a process is complete | finished, and it returns to the start (step S26). By repeatedly performing the above processing, the deceleration calculation unit 8 constitutes a deceleration calculation unit that calculates a deceleration for decelerating the automobile A.
The vehicle speed control unit 9 decelerates the automobile A with the deceleration calculated by the above processing. That is, when it is determined that the vehicle A is to be stopped, the vehicle speed control system of the present embodiment decelerates the vehicle A while matching the boundary between the yellow region R2 and the red region R3 and the position of the stop line T. The automobile A can be stopped at the position of the stop line T of the traffic light K at the timing when the lighting color is switched from yellow to red.

  According to the vehicle speed control system of the present embodiment configured as described above, when it is determined that the position of the traffic light K is within the yellow region R2 or the red region R3, the vehicle A is a traffic light with the lighting color being blue. It is determined that K (the stop line T of the traffic light K) cannot be passed. In this case, as described above, the automobile A can be decelerated with a deceleration at which the automobile A can stop at the position of the traffic light K (the stop line T of the traffic light K) at the timing when the lighting color switches from yellow to red. . Therefore, regardless of the skill level of the driving operation of the driver U, the car A can be surely avoided from entering the dilemma region, and the safe driving of the car A is ensured.

  Further, in the present embodiment, the deceleration of the automobile A is obtained with reference to the stop line T of the traffic light K. For example, when there is no stop line, the lighting information acquired by the receiving unit, or the position information acquiring unit When the position of the information stop line T of the traffic light K cannot be specified from the acquired position information or the like, the deceleration of the automobile A may be obtained based on the position of the traffic light K.

  The traffic signal information display system and the vehicle speed control system of the present invention are not limited to the above embodiments. For example, in each of the embodiments described above, the case where DSRC is used for the traffic signal information transmitter device and the reception unit has been exemplified. However, for example, the traffic signal information may be communicated using an optical beacon. In the communication using the optical beacon, information is communicated only at the moment when the receiver passes under the transmitter. For this reason, if the distance to the traffic signal ahead is included in the information transmitted by the optical beacon, the positional information between the automobile and the traffic signal can be acquired, and it can also serve as the positional information acquisition means. Therefore, when communication of traffic signal information is performed using an optical beacon, the system can be configured without the position information acquisition unit including the GPS and the map information storage device described in the above embodiment.

It is the schematic diagram which showed the structure when the traffic signal information display system which is 1st embodiment of this invention is mounted in a motor vehicle. It is a block diagram which shows the structure of a traffic signal information display system. It is the schematic diagram which showed the positional relationship of the traffic signal K on a road, and a motor vehicle. FIG. 4 is a schematic diagram showing a front view of a driver of an automobile in FIG. 3. It is a flowchart of the positional information calculation process of each area | region repeatedly performed within a traffic signal information processing part. FIG. 10 is a schematic diagram illustrating another example of the driver's forward field of view when the projected image is projected onto the windshield. It is a block diagram of the vehicle speed control system which is 2nd embodiment of this invention. It is a flowchart of the process for calculating the deceleration of the motor vehicle repeatedly performed within a deceleration calculation part.

Explanation of symbols

2 Receiver (lighting information acquisition means)
31 Vehicle speed input part (vehicle speed grasping means)
32 position information acquisition unit (position information acquisition means)
321 GPS (position detection means)
322 Map information storage device (map information storage means)
33 Calculation unit (calculation means)
4 Camera (image acquisition means)
5 Head-up display (superimposed display means)
61 Image correction unit (image acquisition means)
62 Display control unit (superimposition display means)
8 Deceleration calculation part (Deceleration calculation means)
9 Vehicle speed control unit (vehicle speed control means)

Claims (5)

A traffic signal information display system mounted on a vehicle,
Lighting information acquisition means for acquiring lighting information of a traffic light ahead from the outside of the vehicle;
Position information acquisition means for acquiring position information of the traffic light with respect to the vehicle;
Vehicle speed grasping means for grasping the vehicle speed of the vehicle;
When the vehicle has traveled at the vehicle speed grasped by the vehicle speed grasping means, the position information of the predetermined color area, which is an area on the road where the lighting color of the traffic light is a predetermined color, for at least two kinds of predetermined colors, Calculating means for calculating based on the lighting information and the traffic signal position information;
A traffic signal information display system comprising: display means for causing a driver to recognize position information of the predetermined color region. The position information acquisition means includes
Position detecting means for detecting the position of the vehicle;
2. A traffic signal information display system according to claim 1, further comprising map information storage means for storing map information including position information of the traffic signal. The display means includes
An image acquisition means for acquiring the road shape visually recognized through the windshield as image information, and correcting the acquired road shape image information to the three-dimensional road shape image information visually recognized by the driver;
The position information of the predetermined color area is converted into three-dimensional position information when visually recognized by the driver, and the converted three-dimensional position information and the three-dimensional position acquired by the image acquisition unit. And a superimposing display means for superimposing and displaying on the windshield so that it can be recognized in accordance with an actual road shape visually recognized by the driver through the windshield based on the image information of the road shape. Or the traffic signal information display system of 2. When the front traffic light is the first traffic light and the traffic light arranged further forward of the first traffic light is the second traffic light,
It is determined whether or not the vehicle has passed the first traffic light, and if it is determined that the vehicle has passed, the position information of the predetermined color area that is recognized by the driver by the display means is the predetermined color of the first traffic light. The display further includes switching display means for switching from the position information of the area to the position information of the predetermined color area of the second traffic light and for allowing the driver to recognize that the position information of the predetermined color area of the second traffic light has been switched. The traffic signal information display system according to any one of claims 1 to 3. A vehicle speed control system that is mounted on a vehicle and controls the vehicle speed,
Lighting information acquisition means for acquiring lighting information of a traffic light ahead from the outside of the vehicle;
Position information acquisition means for acquiring position information of the traffic light with respect to the vehicle;
Vehicle speed grasping means for grasping the vehicle speed of the vehicle;
When the vehicle travels at the vehicle speed grasped by the vehicle speed grasping means, the position information of the yellow area, which is an area on the road where the lighting color of the traffic light is yellow and red, and the red area, the lighting information and Calculating means for calculating based on the position information;
It is determined whether the position of the traffic light is located in the yellow area or the red area, and when it is determined that the position of the traffic light is in the yellow area or the red area, the yellow area and the red area Deceleration calculation means for calculating a deceleration for decelerating the vehicle so that the boundary with the red region coincides with the position of the traffic light;
A vehicle speed control system comprising vehicle speed control means for controlling the vehicle speed of the vehicle based on the deceleration.

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