JP2017007548A - Rear seat status display controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear seat state display control device by which it is easy for a driver to determine whether or not a passenger on a rear seat is comfortable by seeing a display, in a situation in which the driver wishes to check if the passenger on the rear seat is comfortable, without causing the driver to feel troublesomeness.SOLUTION: A rear seat state display control device includes: a comfort value acquisition unit 41 for acquiring a value that a comfort value, which is a value of a physical amount affecting a passenger's comfort, indicates in a rear seat of a vehicle; a comfort estimation unit 42 for estimating whether the passenger on the rear seat is feeling comfortable or uncomfortable on the basis of the comfort value in the rear seat acquired by the comfort value acquisition unit 41; and a display control unit 46 for displaying rear seat information which is the information for the driver to determine whether or not the passenger on the rear seat is feeling comfortable in a display 3 arranged in front of a driver's seat in the interior of the vehicle. The display control unit 46 determines whether or not the rear seat information is to be displayed in the display on the basis of the result of the estimation by the comfort estimation unit 42.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rear seat state display control device that displays a rear seat state of a passenger compartment on a display visible to a driver.

  Patent Document 1 discloses a device that displays an image of a rear seat of a passenger compartment on a display arranged at a position in a vehicle that can be visually recognized by a driver.

  In addition, when it is determined that the vehicle traveling state is a steady traveling state, the device disclosed in Patent Document 1 displays a video image of the rear seat of the passenger compartment on the display. However, if it is determined that the vehicle traveling state is an unsteady traveling state, an image obtained by imaging the rear seat of the passenger compartment is not displayed on the display. Thereby, in a scene where the driver should concentrate on the driving operation, the driver's attention is prevented from being directed to the image of the rear seat.

  Furthermore, in Patent Document 1, even when the vehicle is in a steady driving state, the rear seat image is displayed on the display when a large movement of the passenger in the rear seat is detected or a loud voice is detected. This is only the case. That is, in Patent Document 1, the rear seat image is not displayed on the display unless a large movement or loud voice of the passenger in the rear seat is detected. Thereby, even if the running state of the vehicle is a steady running state, the image of the rear seat is not always displayed. Therefore, it is possible to suppress the rear seat image from being displayed in a situation that the driver feels unnecessary and the driver from feeling troublesome.

Japanese Patent Laying-Open No. 2014-223887

  However, the scene in which the driver wants to check the situation of the rear seat is not necessarily limited to when the passenger in the rear seat makes a large movement or makes a loud voice. For example, if the rear-seat occupant is an infant who cannot talk about whether the air-conditioning condition is comfortable, the driver should check whether the rear-seat occupant feels comfortable , You may want to check the status of the backseat.

  The present invention has been made based on this circumstance, and the object of the present invention is to make the driver comfortable for the passenger in the rear seat while suppressing the driver from feeling annoying. In the situation where it is desired to confirm whether or not the rear seat is present, it is an object of the present invention to provide a rear seat status display control device that makes it easy to determine whether the passenger in the rear seat is comfortable by looking at the display.

  The above object is achieved by a combination of the features described in the independent claims, and the subclaims define further advantageous embodiments of the invention. Reference numerals in parentheses described in the claims indicate a correspondence relationship with specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present invention. .

The present invention for achieving the above object includes a comfort value acquisition unit (41) for acquiring a comfort value, which is a value of a physical quantity that affects the comfort of an occupant, at a rear seat of a vehicle. ,
A comfort estimation unit (42) for estimating whether the passenger in the rear seat feels comfortable or uncomfortable based on the comfort value in the rear seat acquired by the comfort value acquisition unit;
A display control unit that displays rear seat information, which is information that allows the driver to determine whether or not the passenger in the rear seat feels comfortable, on a display disposed in front of the driver seat in the vehicle cabin 46)
The display control unit is a rear seat state display control device that determines whether to display rear seat information on a display based on an estimation result in the comfort estimation unit.

  According to the present invention, the display control unit displays the rear seat information, which is information that allows the driver to determine whether or not the passenger in the rear seat feels comfortable on the display arranged in front of the driver. indicate. By looking at the rear seat information, the driver can determine whether the passenger in the rear seat feels comfortable while looking forward.

  Further, the display control unit determines whether to display the rear seat information on the display based on the estimation result in the comfort estimation unit. Therefore, the number of cases where the rear seat information is displayed on the display is reduced as compared with the case where the rear seat information is displayed on the display without considering whether the passenger in the rear seat feels comfortable or uncomfortable. Therefore, it can be suppressed that the driver feels bothersome.

  In addition, in the situation where the driver wants to check whether the passenger in the rear seat is comfortable by determining whether to display the rear seat information on the display based on the estimation result in the comfort estimation unit, The seat information is easily displayed on the display. Therefore, in a situation where the driver wants to check whether the passenger in the rear seat is comfortable, it is easy to determine whether the passenger in the rear seat is comfortable by looking at the display.

1 is a diagram illustrating a configuration related to a vehicle display system 1 and a vehicle display system 1. It is a block diagram which shows the function of display control ECU4. It is a flowchart which shows the process which display control ECU4 performs. It is a flowchart which shows the process of FIG.3 S1 in detail. It is a flowchart which shows the process of step S2 of FIG. 3 in detail. It is a flowchart which shows the process of FIG.3 S3 in detail. It is a figure which illustrates the temperature display figure 21 and the humidity display figure 22 which are contained in the comfort confirmation image. It is a figure which shows the priority used when determining a display image in step S6 of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A vehicle display system 1 shown in FIG. 1 is mounted on a vehicle 2.

〔overall structure〕
The vehicle display system 1 is a system for displaying various information obtained from inside and outside the vehicle on the display 3, and in addition to the display 3, the display control ECU 4, the rear seat camera 5, the temperature sensor 7, the humidity sensor 8, and the pressure sensor 9. , A microphone 10 and a display changeover switch 11.

  The vehicle 2 is also equipped with a back camera 12, a surrounding monitoring ECU 13, and a navigation ECU 14. The back camera 12, the periphery monitoring ECU 13, the navigation ECU 14, and the display control ECU 4 are connected to each other via an in-vehicle LAN 15 so as to communicate with each other. The display 3, the rear seat camera 5, and the display changeover switch 11 are also connected to the in-vehicle LAN 15. The configuration connected to the in-vehicle LAN 15 may be connected to the in-vehicle LAN via a gateway module (not shown).

  The display 3 is disposed in front of the driver's seat 16 in the passenger compartment of the vehicle 2. The display 3 can display an image, an image captured by the rear seat camera 5, an image captured by the back camera 12, a comfort confirmation image, a risk confirmation image, an outside object warning image, a navigation image, an audio, which will be described later. An operation image is also displayed.

  Display control ECU4 which is a backseat condition display control apparatus is a computer provided with CPU, ROM, RAM, etc. The CPU executes the program stored in the storage medium such as the ROM while using the temporary storage function of the RAM, so that the display control ECU 4 functions as each unit 41 to 46 shown in FIG. The functions of these units 41 to 46 will be described later.

  The display control ECU 4 is an ECU that controls the display 3, and is connected to the display 3 via the in-vehicle LAN 15. The display control ECU 4 is connected to the rear seat camera 5, the display changeover switch 11, the back camera 12, the periphery monitoring ECU 13, and the navigation ECU 14 via the in-vehicle LAN 15. Furthermore, the temperature sensor 7, the humidity sensor 8, the pressure sensor 9, and the microphone 10 are directly connected by a signal line.

  Note that some or all of the components connected by the in-vehicle LAN 15 may be directly connected by signal lines instead of the in-vehicle LAN 15. On the other hand, instead of the signal line, a configuration in which the signal line is directly connected may be connected by the in-vehicle LAN 15. Further, the navigation ECU 14 may have a function as the display control ECU 4.

  The rear seat camera 5 captures an image of a predetermined range including the rear seat 17. An image captured by the rear seat camera 5 is hereinafter referred to as a rear seat image. The rear seat camera 5 periodically captures rear seat images and sequentially outputs rear seat image signals representing the captured rear seat images to the display control ECU 4. The operation of the rear seat camera 5 is controlled by the display control ECU 4.

  In the rear seat camera 5 shown in FIG. 1, the imaging range is set so that the rear seat portion of the rear seat 17 is near the center of the image. In the present embodiment, a child seat 18 is fixed to the rear seat 17 of the rear seat 17 by a seat belt. Therefore, the rear seat camera 5 captures an image of a passenger seated on the child seat 18. Since the child seat 18 is fixed to the rear seat 17, the passenger seated on the child seat 18 is also a rear seat passenger.

  In addition to the rear seat camera 5, another camera in which the rear seat portion of the rear seat 17 is near the center of the image may be provided. Further, the rear seat camera 5 may be configured to capture the entire rear seat 17.

  The temperature sensor 7 is disposed at a predetermined portion of the child seat 18 and detects the temperature near the occupant seated on the child seat 18. And the temperature signal showing detected temperature is output to display control ECU4.

  The humidity sensor 8 is also arranged at a predetermined portion of the child seat 18 and detects the humidity near the occupant seated on the child seat 18. And the humidity signal showing the detected humidity is output to display control ECU4.

  The pressure sensor 9 is disposed in the child seat 18 at a position where the detected value changes according to a change in the posture of the occupant seated on the child seat 18, and the occupant seated on the child seat 18 adds to the pressure sensor 9. Detect the pressure applied. And the pressure signal showing the detected pressure is output to display control ECU4.

  The microphone 10 is disposed at a predetermined portion of the child seat 18 and detects a voice of an occupant seated on the child seat 18. And the audio | voice signal showing the detected audio | voice is output to display control ECU4.

  Only one temperature sensor 7, humidity sensor 8, pressure sensor 9, and microphone 10 are shown in FIG. 1 for convenience of illustration. However, a plurality of pressure sensors 9 are provided. For example, the child seat 18 is provided with two at the upper back and two at the lower back. A plurality of temperature sensors 7, humidity sensors 8, and microphones 10 may be provided.

  The display changeover switch 11 is a switch that is operated by the driver when instructing to change the image displayed on the display 3. Since this is a switch operated by the driver, the display changeover switch 11 is arranged near the driver's seat. When the display changeover switch 11 is operated, a display changeover signal indicating that is output to the display control ECU 4.

  When the display control ECU 4 obtains a display switching signal in a state where nothing is displayed on the display 3 or an image having a lower priority than the comfort confirmation image is displayed, the display control ECU 4 displays Display a comfort confirmation image. On the other hand, when the display switching signal is acquired while the comfort confirmation image is displayed on the display 3, the display of the comfort confirmation image is terminated. Other processes executed by the display control ECU 4 will be described later.

  The back camera 12 is controlled by the periphery monitoring ECU 13. The back camera 12 is disposed on the rear end surface of the vehicle 2, periodically captures a rear image of the vehicle 2, and sequentially outputs a rear image signal representing the captured rear image to the display control ECU 4.

  The periphery monitoring ECU 13 is connected to a front camera, a radar, etc. (not shown), and detects an object present around the vehicle. Then, it is determined whether or not the detected object needs attention. When it is determined that attention is required for the detected object, a warning image signal representing an external object warning image that is an image for warning the driver that attention is required for the external object is displayed. And output to the display control ECU 4. If the vehicle 2 is moving backward, the back camera 12 is operated to capture a rear image.

  The navigation ECU 14 generates a navigation image such as a route guidance image displayed on a display by a general navigation device, and outputs a navigation image signal representing the navigation image to the display control ECU 4. The navigation ECU 14 also has an audio function. When the audio function is being executed, an audio image indicating the execution state of the audio function is generated, and an audio image signal representing the audio image is output to the display control ECU 4.

[Function of the display control ECU 4]
Next, the function of the display control ECU 4 will be described. As shown in FIG. 2, the display control ECU 4 includes a rear seat camera 5, a temperature sensor 7, a humidity sensor 8, a pressure sensor 9, a microphone 10, a display changeover switch 11, a back camera 12, a peripheral monitoring ECU 13, and a navigation ECU 14. A signal is input.

  Specifically, rear seat image data is input from the rear seat camera 5, and a temperature signal, a humidity signal, a pressure signal, and an audio signal are respectively transmitted from the temperature sensor 7, the humidity sensor 8, the pressure sensor 9, and the microphone 10. Entered. A display switching signal is input from the display switching switch 11. Rear image data is input from the back camera 12. A vehicle outside object warning image is input from the periphery monitoring ECU 13, and a navigation image signal or an audio image signal is input from the navigation ECU 14.

  In addition, an acceleration signal and a seat belt state signal are also input to the display control ECU 4. The acceleration signal is a signal that represents acceleration generated in the vehicle 2. This acceleration is detected by an acceleration sensor (not shown) provided in the vehicle 2. The acceleration sensor is a biaxial or triaxial acceleration sensor, and detects at least acceleration generated in the vehicle longitudinal direction and acceleration generated in the vehicle width direction. The acceleration signal may be acquired directly from the acceleration sensor without going through another device, or may be acquired from an ECU (not shown) such as the periphery monitoring ECU 13 or an ECU that performs traveling control.

  The seat belt state signal is a signal indicating whether or not a seat belt provided in each seat of the vehicle 2 is attached, that is, whether or not the seat belt is attached. The seat belt state signal indicates the seat belt wearing state for each seat. The seat belt wearing state signal is acquired from a sensor that detects the seat belt wearing state.

  As shown in FIG. 2, the display control ECU 4 includes a comfort value acquisition unit 41, a comfort estimation unit 42, a physical condition determination unit 43, a posture determination unit 44, a dangerous state determination unit 45, and a display control unit 46. Note that some or all of the functions executed by the display control ECU 4 may be configured in hardware by one or a plurality of ICs.

  The comfort value acquisition unit 41 acquires a temperature signal and a humidity signal from the temperature sensor 7 and the humidity sensor 8, respectively, at regular intervals. The temperature and humidity represented by the temperature signal and the humidity signal, respectively, are values of physical quantities that affect passenger comfort. Therefore, temperature and humidity correspond to the comfort values in the claims.

  The comfort estimation unit 42 determines whether the passenger sitting on the child seat 18 is based on a comparison between the temperature and humidity acquired by the comfort value acquisition unit 41 and a comfort range set in advance for the temperature and humidity. Estimate whether you feel comfortable or uncomfortable. In addition, an audio signal is acquired from the microphone 10, and it is estimated from the sound represented by the audio signal whether the passenger seated in the child seat 18 feels comfortable or uncomfortable. For example, if the state where the volume of the voice is equal to or greater than the threshold value continues intermittently for a certain period of time, it is estimated that the occupant sitting on the child seat 18 feels uncomfortable.

  The physical condition determination unit 43 periodically determines whether or not the occupant sitting on the child seat 18 is in poor physical condition. For this determination, for example, a rear seat image is used. When the rear seat image is used, an image of a normal face of the occupant sitting on the child seat 18 is stored. The determination that the vehicle is normal is made by, for example, inquiring the driver whether the passenger seated in the child seat 18 is normal. The normal face image is compared with the occupant face image extracted from the latest rear seat image. As a result of the comparison, it is determined that the physical condition of the occupant seated in the child seat 18 is poor when a predetermined determination condition is satisfied, for example, it can be determined that the skin color is significantly different from that in the normal state.

  In addition to this determination method, for example, when the movement of an occupant seated on the child seat 18 is analyzed from the rear seat image, and it is determined that the movement is significantly different from the normal movement, it is determined that the physical condition is poor. May be. Alternatively, the body temperature may be detected and the physical condition may be determined from the body temperature. The body temperature is detected from the rear seat image by providing the rear seat camera 5 with a function of detecting infrared rays, for example. Further, a heart rate sensor may be attached to the child seat 18 and it may be determined from the heart rate whether or not the physical condition is bad.

  The posture determination unit 44 periodically determines whether or not an occupant seated on the child seat 18 may be in a dangerous posture. The dangerous posture is, for example, a posture that has fallen from the child seat 18, that is, the seat, or a posture that is about to fall from the child seat 18. Also, even if you are seated, such as if you are not about to fall off your seat, or if you are seated, if you are in a posture that is significantly different from the normal seating posture, you are determined to be in a dangerous posture. .

  The occupant seated in the child seat 18 is a child, and if the child is about to fall from the seat or turns back while driving, the child must be seated quickly in the original posture. There is. Therefore, it is periodically determined whether or not an occupant seated on the child seat 18 may be in a dangerous posture.

  A rear seat image is used to determine the sitting posture. The rear seat image is analyzed to determine the occupant's posture, and the posture is compared with the normal seating posture to determine whether the seating posture is normal. Alternatively, the pressure distribution applied to the child seat 18 by the occupant may be determined based on the pressure signals respectively acquired from the plurality of pressure sensors 9, and the posture of the occupant may be estimated from the pressure distribution.

  In addition, the posture determination unit 44 determines whether or not there is a possibility of a dangerous posture as well as a case where the posture is actually a dangerous posture. This determination is made by acquiring an acceleration signal.

  When the longitudinal acceleration of the vehicle 2 exceeds the threshold, or when the acceleration in the width direction of the vehicle 2 exceeds the threshold, it is determined that there is a possibility that the posture is dangerous.

  When the longitudinal acceleration exceeds the threshold value, it means that sudden braking has been applied, and when the width direction acceleration exceeds the threshold value, it means that a large roll has occurred. This is because the posture of the occupant seated in the child seat 18 may be significantly different from the normal seating posture when sudden braking is applied or when a large roll occurs. .

  Also, when it is detected that the seat belt is detached, it is determined that there is a possibility that the posture is dangerous. This determination is performed by acquiring a seat belt state signal.

  This is because, even when the seat belt is detached during traveling, it is necessary to quickly reattach the seat belt. Note that the seat belt state signal indicates not the seat belt of the child seat 18 but the seat belt of the rear seat 17 to which the child seat 18 is fixed. In addition to this, it may also be detected whether or not the seat belt of the child seat 18 is detached. Whether or not the seat belt of the child seat 18 is removed is determined by analyzing a rear seat image, for example.

  The dangerous state determination unit 45 determines whether there is a possibility that an occupant of the child seat 18 that is an occupant in the rear seat is in a dangerous state. The dangerous state determination unit 45 acquires the determination result of the physical condition determination unit 43 and the determination result of the posture determination unit 44 for this determination. And when the physical condition determination part 43 determines with the passenger | crew of the child seat 18 having a bad physical condition, it determines with the passenger | crew of the child seat 18 being in a dangerous state. In addition, when the posture determination unit 44 determines that there is a possibility that the occupant sitting on the child seat 18 is in a dangerous posture, the occupant of the child seat 18 may be in a dangerous state. Judge that there is.

  The display control unit 46 determines an image to be displayed on the display 3 based on the estimation result of the comfort estimation unit 42 and the determination result of the dangerous state determination unit 45. Processing executed by the display control unit 46 will be described with reference to FIG.

  The details of step S1 in FIG. 3 are shown in FIG. 4, the details of step S2 are shown in FIG. 5, and the details of step S3 are shown in FIG. 3 to 6, step S11 in FIG. 4 is a process of the comfort value acquisition unit 41, step S12 is a process of the comfort estimation unit 42, and steps S201 to S207 and S213 in FIG. 5 are processes of the posture determination unit 44. Step S209 is processing of the physical condition determination unit 43, and steps S207, S210, 211, and S214 are processing of the dangerous state determination unit 45. The other steps are processes executed by the display control unit 46.

  The process shown in FIG. 3 is periodically executed when the vehicle 2 is traveling forward and an occupant is seated on the child seat 18. Whether or not the vehicle 2 is traveling forward is determined from the vehicle speed, for example. Whether or not an occupant is seated on the child seat 18 is determined from, for example, a rear seat image. Or you may judge from the pressure signal which the pressure sensor 9 detects.

  In step S1 of FIG. 3, it is determined whether or not the comfort confirmation image is to be displayed. In the present embodiment, the comfort confirmation image includes a still rear seat image, and a temperature display graphic 21 and a humidity display graphic 22 shown in FIG. The still rear seat image is a still image of the rear seat image, and among the rear seat images sequentially supplied from the rear seat camera 5, the latest rear seat image is the still rear seat image. The reason why the rear seat image included in the comfort confirmation image is a still image is that when a moving image is displayed on the display 3 during forward traveling, the driver is less likely to concentrate on driving.

  The temperature display figure 21 and the humidity display figure 22 are figures in which temperature and humidity are displayed on an arc-shaped gauge. The temperature display graphic 21 and the humidity display graphic 22 indicate the temperature and humidity by the length of the arc, and the temperature and humidity are respectively set to a comfort range, a caution range, and an uncomfortable range set in advance. The display color changes depending on whether it belongs. That is, the display color represents the result of evaluating the temperature and humidity, which are comfort values.

  The driver confirms whether the occupant seated in the child seat 18 feels comfortable among the still rear seat image, the temperature display graphic 21 and the humidity display graphic 22 included in the comfort confirmation image. Information that can be. Accordingly, the still rear seat image, the temperature display graphic 21 and the humidity display graphic 22 correspond to the rear seat information in the claims.

  Details of step S1 are shown in FIG. In FIG. 4, in step S <b> 11, temperature signals, humidity signals, and sound signals representing temperature, humidity, and sound are acquired from the temperature sensor 7, the humidity sensor 8, and the microphone 10.

  In step S12, using the temperature signal, humidity signal, and audio signal acquired in step S11, it is estimated whether the passenger sitting on the child seat 18 feels comfortable or uncomfortable in FIG. Estimation is performed by the method described in the section 42.

  In step S13, it is determined whether or not it is estimated that the user feels uncomfortable in step S12. If it is estimated that the user feels uncomfortable, the determination in step S13 is YES. In this case, the process proceeds to step S14. In step S14, it is determined that a comfort confirmation image needs to be displayed.

  On the other hand, if it is not estimated that the user feels uncomfortable in step S12, the determination in step S13 is NO. In this case, the process proceeds to step S15. In step S15, it is determined whether or not the comfort confirmation image has been displayed for a predetermined time. Even when this determination is YES, the process proceeds to step S14 described above. Therefore, even when the comfort confirmation image is not displayed for a certain period of time, it is determined that the comfort confirmation image needs to be displayed.

  On the other hand, if the determination in step S15 is no, the process proceeds to step S16. In step S16, it is determined whether or not there is a display instruction from the driver. This determination is to determine whether or not the display changeover switch 11 is operated and the display changeover signal is input to the display control ECU 4 in a state where the comfort confirmation image is not displayed on the display 3. Even when the determination in step S16 is YES, the process proceeds to step S14. On the other hand, if the determination in step S16 is also NO, the process proceeds to step S17. In step S17, it is determined that the comfort confirmation image need not be displayed.

  Subsequently, step S2 is executed. In step S2, it is determined whether or not to display a danger confirmation image. The danger confirmation image is an image in which the driver confirms whether or not the occupant sitting on the child seat 18 is in a dangerous state. In the present embodiment, the danger confirmation image includes a still rear seat image and a message that prompts the user to confirm whether or not the passenger is in a dangerous state.

  Details of step S2 are shown in FIG. In FIG. 5, in step S201, an acceleration signal representing the longitudinal acceleration of the vehicle 2 and an acceleration signal representing the width direction acceleration are acquired.

  In the subsequent step S202, it is determined whether the longitudinal acceleration and the width acceleration represented by the acceleration signal acquired in step S201 are equal to or greater than the threshold values set for each. If either one is greater than or equal to the threshold, the determination in step S202 is YES. If the longitudinal acceleration and the width acceleration are both smaller than the threshold value, the determination in step S202 is NO. If judgment of step S202 is NO, it will progress to step S203.

  In step S203, a seat belt state signal is acquired. In a succeeding step S204, it is determined whether or not the seat belt is detached based on the seat belt state signal acquired in the step S203. As described with reference to FIG. 2, a rear seat image may be acquired and it may be determined whether or not the seat belt is removed from the rear seat image. If it is determined that the seat belt is not detached, the determination in step S204 is NO. If the determination in step S204 is no, the process proceeds to step S205.

  In step S205, a rear seat image signal representing the rear seat image is acquired from the rear seat camera 5. In step S206, a pressure signal is acquired from the pressure sensor 9. In step S207, the rear seat image signal and the pressure signal are used to determine whether or not the posture of the occupant sitting on the child seat 18 is a dangerous posture by the method described in the posture determination unit 44 of FIG.

  In step S208, it is determined whether or not it is determined that the posture is dangerous in step S207. If it is not determined that the posture is dangerous, the process proceeds to step S209. In step S209, the rear seat image signal acquired in step S205 or the pressure signal acquired in step S206 in addition to this is seated on the child seat 18 by the method described in the physical condition determination unit 43 in FIG. Determine the physical condition of the passenger.

  In step S210, it is determined whether or not it is determined in step S209 that the physical condition is bad. If it is not determined that the physical condition is bad, the process proceeds to step S211.

  When the process proceeds to step S211, it is determined that the posture is not dangerous and the physical condition is not bad. Therefore, in step S211, it is determined that the state is not dangerous. In subsequent step S212, it is determined that the danger confirmation image does not need to be displayed.

  Step S213 is executed when it is determined in step S202 that the acceleration is equal to or greater than the threshold value, or when it is determined in step S204 that the seat belt is detached. Therefore, in step S213, it is determined that there is a possibility of a dangerous posture.

  If step S213 is executed, the process proceeds to step S214. Also, if the determination in step S208 is YES, that is, if it is determined that the posture is dangerous, or if the determination in step S210 is YES, that is, if it is determined that the physical condition is poor, step The process proceeds to S214.

  In step S214, it is determined that the passenger of the child seat 18 may be in a dangerous state. Then, the process proceeds to step S215. In step S215, it is determined that the danger confirmation image needs to be displayed.

Subsequently, step S3 is executed. In step S3, it is determined whether or not to display an external object warning image. As described above, the vehicle outside object warning image is an image for warning the driver that attention should be paid to the vehicle outside object.
Details of this step S3 are shown in FIG. In FIG. 6, in step S <b> 31, it is determined whether or not a warning image signal is input from the periphery monitoring ECU 13. If this judgment is YES, it will progress to Step S32. In step S32, it is determined that it is necessary to display an external object warning image. On the other hand, if the determination in step S31 is NO, the process proceeds to step S33. In step S33, it is determined that the vehicle outside object warning image is not required to be displayed.

  Subsequently, step S4 is executed. In step S4, it is determined whether or not to display the rear image. Specifically, if a rear image signal is input from the back camera 12, it is determined that the rear image needs to be displayed. If no rear image signal is input, it is determined that the rear image need not be displayed.

  In step S5, whether or not to display the in-vehicle device operation image is determined. In the present embodiment, the in-vehicle device operation image means a navigation image and an audio image generated by the navigation ECU 14. If a navigation image signal or an audio image signal representing these images is input from the navigation ECU 14, it is determined that the in-vehicle device image needs to be displayed. If neither the navigation image signal nor the audio image signal is input, it is determined that the in-vehicle device image need not be displayed.

  In step S6, an image to be displayed in the common display area of the display 3 is determined. The common display area is a display area in which five images of an external object warning image, a danger confirmation image, a rear image, a comfort confirmation image, and an in-vehicle device operation image are displayed on the display 3, and display of these five images is performed. Regions overlap each other. Therefore, if one of these five images is displayed in the common display area, the other four images cannot be displayed in the common display area.

  In step S6, an image to be displayed in the common display area of the display 3 is determined. Specifically, when it is determined that only one of the processes of steps S1 to S5 needs to display an image, the image is displayed on the display 3.

  When it is determined that it is necessary to display an image in two or more of the processes of steps S1 to S5, an image to be displayed on the display 3 is determined according to the priority order. Priorities are set in advance. This priority order is shown in FIG. As shown in FIG. 8, the vehicle outside object warning image has the highest priority. Hereinafter, the priority order decreases in the order of the risk confirmation image, the rear image, the comfort confirmation image, and the in-vehicle device operation image.

  In step S7, the image determined in step S6 is displayed on the display 3. In step S8, it is determined whether a display end operation has been performed by the driver. Specifically, the display end operation is an operation of the display changeover switch 11. Therefore, in step S7, it is determined whether a display switching signal has been acquired. If it is determined that a display end operation has been performed, the process proceeds to step S9. In step S9, the display of the currently displayed image is terminated.

  On the other hand, if the determination in step S8 is NO, in step S9, the process of FIG. 3 is terminated without executing the process of terminating the display of the currently displayed image. However, even when step S9 is not executed, even when it is determined that the image displayed on the display 3 is not required to be displayed, the display of the image displayed on the display 3 is terminated and a new display image is displayed. The image determined in (1) is displayed on the display 3.

[Summary of Embodiment]
As described above, in the present embodiment described above, the comfort confirmation image is displayed on the display 3 arranged in front of the driver. The comfort confirmation image includes a rear seat image, a temperature display graphic 21 and a humidity display graphic 22 so that the driver can determine whether or not the passenger seated on the child seat 18 feels comfortable. Therefore, the driver can determine whether or not the passenger seated on the child seat 18 feels comfortable while looking at the front by looking at the comfort confirmation image.

  Further, the display control unit 46 determines whether or not to display the comfort confirmation image on the display 3 based on the estimation result in the comfort estimation unit 42. Therefore, the comfort confirmation image is displayed on the display 3 as compared with the case where the comfort confirmation image is displayed on the display 3 without considering whether the passenger seated in the child seat 18 feels comfortable or uncomfortable. The display is reduced. Therefore, it can be suppressed that the driver feels bothersome.

  Further, whether or not the driver sitting on the child seat 18 is comfortable by determining whether or not to display the comfort confirmation image on the display 3 based on the estimation result in the comfort estimation unit 42. In a situation where it is desired to confirm the comfort confirmation image, the comfort confirmation image is easily displayed on the display 3. Therefore, in a situation where the driver wants to check whether or not the occupant seated on the child seat 18 is comfortable, it is easy to determine whether the occupant seated on the child seat 18 is comfortable by looking at the display 3. .

  Further, in the present embodiment, even if it is determined that the passenger sitting on the child seat 18 feels uncomfortable, the comfort confirmation image is displayed when the comfort confirmation image is not displayed for a certain period of time. Decide that you need to. Thereby, even when it is not estimated that the occupant seated in the child seat 18 feels uncomfortable, the state of the occupant seated in the child seat 18 can be confirmed periodically.

  Further, in this embodiment, when it is determined that the occupant seated on the child seat 18 is in a dangerous posture and when it is determined that the physical condition is bad, a danger confirmation image is displayed on the display 3. The Thereby, the driver can confirm at an early stage whether or not the occupant seated on the child seat 18 may be in a dangerous posture and whether or not his / her physical condition is bad.

  In the present embodiment, in addition to the comfort confirmation image, a vehicle exterior object warning image, a danger confirmation image, a rear image, and an in-vehicle device operation image are also displayed in the common display area where the comfort confirmation image is displayed on the display 3. It is supposed to be. Therefore, these five types of images cannot be displayed simultaneously. Therefore, when step S6 is executed and the condition for displaying a plurality of images among these five images is satisfied at the same time, an image with a high priority is displayed. Thereby, it is possible to suppress a delay in displaying a relatively urgent image on the display 3.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, The following modification is also contained in the technical scope of this invention, Furthermore, the summary other than the following is also included. Various modifications can be made without departing from the scope.

<Modification 1>
For example, in the above-described embodiment, the occupant of the rear seat 17 that is a target for displaying the comfort confirmation image or the like is an occupant seated on the child seat 18 fixed to the rear seat 17. However, an occupant sitting directly on the rear seat 17 may be the target.

<Modification 2>
The comfort confirmation image of the above-described embodiment is an image including the rear seat image, the temperature display graphic 21, and the humidity display graphic 22. However, only the rear seat image may be used as the comfort confirmation image, or one or both of the temperature display graphic 21 and the humidity display graphic 22 may be used as the comfort confirmation image without including the rear seat image.

<Modification 3>
The comfort may be estimated by further using the degree of tightening of the seat belt. The degree of tightening of the seat belt is determined by providing a sensor for detecting the amount of seat belt retracted and outputting a signal from the sensor.

1: Vehicle display system 2: Vehicle 3: Display 4: Display control ECU 5: Rear seat camera 7: Temperature sensor 8: Humidity sensor 9: Pressure sensor 10: Microphone 11: Display changeover switch 12: Back camera 13: Perimeter monitoring ECU 14: Navigation ECU 15: In-vehicle LAN 16: Driver's seat 17: Rear seat 18: Child seat 21: Temperature display graphic 22: Humidity display graphic 41: Comfort value acquisition unit 42: Comfort estimation unit 43: Physical condition determination unit 44: Posture Determination unit 45: Dangerous state determination unit 46: Display control unit

Claims (15)

A comfort value acquisition unit (41) for acquiring a value indicated by a comfort value, which is a value of a physical quantity that affects passenger comfort, at the rear seat of the vehicle;
A comfort estimation unit (42) for estimating whether the passenger in the rear seat feels comfortable or uncomfortable based on the comfort value in the rear seat acquired by the comfort value acquisition unit;
Display control for displaying rear seat information, which is information that allows a driver to determine whether or not the passenger in the rear seat feels comfortable, on a display disposed in front of the driver's seat in the passenger compartment of the vehicle Part (46),
The said display control part determines whether the said backseat information is displayed on the said display based on the estimation result in a comfort estimation part, The backseat condition display control apparatus characterized by the above-mentioned. In claim 1,
The display control unit displays at least a still image of a passenger in the rear seat on the display as the rear seat information. In claim 1 or 2,
The display control unit displays at least one of the comfort value and the result of evaluating the comfort value as the backseat information on the display. In any one of Claims 1-3,
The display control unit displays the rear seat information on the display when the comfort estimation unit estimates that the passenger in the rear seat feels uncomfortable, and the comfort estimation unit is constant. The rear seat status display control device, wherein the rear seat information is displayed on the display even when it is not estimated that the passenger in the rear seat feels uncomfortable for more than an hour. In any one of Claims 1-4,
The comfort value acquisition unit acquires at least one of the temperature of the rear seat and the humidity of the rear seat as the comfort value. In any one of Claims 1-5,
The comfort estimator obtains a voice uttered by the passenger in the rear seat and uses the volume of the voice to estimate whether the passenger in the rear seat feels comfortable or uncomfortable. A rear seat status display control device. In claim 2,
A dangerous state determination unit (45) for determining whether or not there is a possibility that the passenger in the rear seat is in a dangerous state;
The display control unit determines whether or not to display the rear seat information on the display based on the estimation result in the comfort estimation unit and the determination result in the dangerous state determination unit. Display control device. In claim 7,
A posture determination unit (44) for determining whether or not there is a possibility that the passenger in the rear seat is in a dangerous posture;
The dangerous state determination unit may be in a dangerous state when the posture determination unit determines that the rear seat passenger may be in a dangerous posture. A rear-seat status display control device characterized in that it has a characteristic. In claim 7 or 8,
A physical condition determination unit (43) for determining the physical condition of the passenger in the rear seat;
When the physical condition determining unit determines that the physical condition of the rear seat occupant is poor, the dangerous state determination unit may be in a dangerous state. The rear seat status display control device. In claim 8,
The rear seat status display control device, wherein the posture determination unit determines whether or not there is a possibility that the passenger in the rear seat is in a dangerous posture from the image of the passenger in the rear seat. In claim 8 or 10,
A pressure sensor is provided at a position where the detected value changes according to the posture of the occupant seated on the rear seat of the rear seat,
The posture determination unit determines whether there is a possibility that a passenger in the rear seat is in a dangerous posture based on a detection value of the pressure sensor. . In any one of Claims 8, 10, and 11,
The posture determination unit determines that an occupant in the rear seat may be in a dangerous posture when acceleration equal to or higher than a preset threshold value is generated in the vehicle. Status display controller. In any one of Claims 8 and 10-12,
The posture determination unit determines that there is a possibility that an occupant in the rear seat may be in a dangerous posture when detecting that the seat belt in the rear seat is detached. Display control device. In any one of Claims 1-13,
The display control unit
Information other than the backseat information is also displayed in the display area of the backseat information on the display based on a predetermined display condition being satisfied,
Priorities are set for each of the information other than the rear seat information and the rear seat information,
When the conditions for displaying the rear seat information on the display and the conditions for displaying information other than the rear seat information on the display are satisfied at the same time, the priority set for the information displayed on the display is set respectively. A rear seat status display control device that determines whether to display information other than the rear seat information or the rear seat information on the display based on the rank. In any one of Claims 7-13,
The display control unit
Information other than the backseat information is also displayed in the display area of the backseat information on the display based on a predetermined display condition being satisfied,
Priorities for displaying the rear seat information based on the estimation result of the comfort estimation unit, priorities for displaying the rear seat information based on the determination result of the dangerous state determination unit, and the rear Priorities for information other than seat information are set,
When the conditions for displaying the rear seat information on the display and the conditions for displaying information other than the rear seat information on the display are satisfied at the same time, the priority set for the information displayed on the display is set respectively. A rear seat status display control device that determines whether to display information other than the rear seat information or the rear seat information on the display based on the rank.

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