JP2021020671A - Vehicle display control device - Google Patents

Abstract

To provide a vehicle display control device capable of creating a vehicle cabin environment which occupants can effectively utilize by using a windshield display.SOLUTION: A vehicle display control device is mounted on an automatic operation vehicle including a windshield display. The windshield display is configured to change transmissivity of external light. The vehicle display control device includes a transmissivity control part (S500) configured to reduce the transmissivity to make at least one occupant feel sleepy.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a display control device mounted on a vehicle.

In recent years, with the development of automatic driving technology of vehicles, various information presentation devices such as digital mirrors and head-up displays have been proposed in order to improve the comfort in the vehicle interior (for example, Patent Document 1). In addition, a windshield display that displays information on the entire surface of the windshield by overlaying it on the background has also been proposed.

JP-A-2018-124535

By the way, it is thought that fully automated driving will be possible in the future. In a vehicle in which fully autonomous driving is performed, it is desirable to construct a vehicle interior environment so that occupants including the driver can effectively use the vehicle interior. As a result of the study, the present inventor has obtained the finding that the windshield display can be used for constructing the vehicle interior environment.

The present disclosure provides a display control device for a vehicle capable of constructing a vehicle interior environment suitable for an occupant by using a windshield display.

One aspect of the present disclosure is a vehicle display control device (10) mounted on an autonomous driving vehicle (200) provided with a windshield display (17). The windshield display is configured so that the transmittance of external light can be changed. The vehicle display control device includes a transmittance control unit (S500, S600) configured to reduce the transmittance in order to promote the sleep of at least one occupant.

According to one aspect of the present disclosure, the transmittance of the windshield display is reduced in order to promote the sleep of the occupant. By reducing the transmittance of the windshield display, the intrusion of outside light into the vehicle interior is suppressed. Therefore, the occupant can quickly fall asleep and take a sufficient nap in the passenger compartment. That is, by controlling the windshield display as an environment construction device in the vehicle interior, it is possible to construct a vehicle interior environment suitable for the occupants.

It is a figure which shows the vehicle interior of the automatic driving vehicle which concerns on 1st Embodiment. It is a block diagram which shows the structure of the vehicle interior environment construction system which concerns on 1st Embodiment. It is a flowchart which shows the vehicle interior environment control processing which concerns on 1st Embodiment. It is a flowchart which shows the determination process of the target occupant which concerns on 1st Embodiment. It is a flowchart which shows the falling asleep process which concerns on 1st Embodiment. It is a flowchart which shows the sleep processing which concerns on 1st Embodiment. It is a flowchart which shows the awakening process which concerns on 1st Embodiment. It is a flowchart which shows another example of the awakening process which concerns on 1st Embodiment. It is a flowchart which shows the emergency awakening process which concerns on 1st Embodiment. It is a figure which shows an example of the pattern of the transmittance controlled for each region of WSD in order to promote falling asleep according to 1st Embodiment. It is a figure which shows the vehicle interior of the self-driving vehicle at the time of awakening processing which concerns on 2nd Embodiment. It is a flowchart which shows the awakening process which concerns on 2nd Embodiment. It is a flowchart which shows another example of the awakening process which concerns on 2nd Embodiment.

Hereinafter, modes for carrying out the present disclosure will be described with reference to the drawings.
(First Embodiment)
<1. Configuration of vehicle interior environment construction system>
First, the configuration of the vehicle interior environment construction system 100 according to the present embodiment will be described with reference to FIGS. 1 and 2. The vehicle interior environment construction system 100 is mounted on the autonomous driving vehicle 200. In the present embodiment, the autonomous driving vehicle 200 is a vehicle capable of autonomous driving of level 4 or higher of the Society of Automotive Engineers standard.

The vehicle interior environment construction system 100 includes an electronic control device (hereinafter, ECU) 10, a peripheral monitoring sensor 11, a biological sensor 20, an illuminance sensor 15, an electronic shutter 16, and a windshield display (hereinafter, WSD) 17. , The illuminator 18.

The peripheral monitoring sensor 11 is a sound wave sensor (that is, sonar), a laser radar, a millimeter wave radar, an image sensor, or the like. The peripheral monitoring sensor 11 is mounted, for example, in the center of the front bumper of the autonomous driving vehicle 200, or on the left side or the right side of the front bumper. The peripheral monitoring sensor 11 detects obstacles such as other vehicles existing around the autonomous driving vehicle 200, and transmits the detection information to the ECU 10.

The biological sensor 20 is a sensor that detects biological information of an occupant, and includes an IR sensor 12, a heart rate sensor 13, and a driver status monitor (hereinafter, DSM) 14. In the present embodiment, the biological information includes the body temperature, facial expression, and heartbeat of the occupant.

The IR sensor 12 is a radiation thermometer that absorbs infrared rays emitted by an occupant and measures the body temperature of the occupant. The IR sensor 12 is mounted in the center and above the vehicle width direction, for example, inside the front windshield 25. When a plurality of occupants are on the autonomous driving vehicle 200, the IR sensor 12 measures the body temperature of each occupant. Then, the IR sensor 12 measures the body temperature of the occupant at a predetermined cycle, and transmits the measured temperature information to the ECU 10.

The DSM 14 is a camera that captures a facial image of an occupant including a driver. The DSM 14 is mounted in the center and above the vehicle width direction, for example, inside the front windshield 25. When a plurality of occupants are on the autonomous driving vehicle 200, the DSM 14 captures a face image including the faces of the plurality of occupants. Alternatively, the DSM 14 may be equipped with a camera provided for each seat. The DSM 14 captures a face image of the occupant at a predetermined cycle, and transmits the captured face image of the occupant to the ECU 10.

The heart rate sensor 13 is a sensor that detects the pulse of the occupant. The heart rate sensor 13 is mounted at a position where the occupant comes into contact with each seat of the autonomous driving vehicle 200. Specifically, the heart rate sensor 13 is mounted on an elbow rest that the occupant's arm contacts and a seat surface that the occupant's arm contacts, and detects the pulse of the occupant's arm and thigh. The heart rate sensor 13 detects the occupant's pulse information (that is, heart rate information) at a predetermined cycle, and transmits the detected pulse information to the ECU 10.

The biosensor 20 does not have to include the heart rate sensor 13. In this case, the movement of the blood vessels of the face may be detected from the facial image of the occupant taken by the DSM14 to calculate the pulse.

The illuminance sensor 15 is a sensor that detects the illuminance of light. The illuminance sensor 15 is mounted in a place that receives a lot of external light, such as the inside of the front windshield 25 or the back side of the front mirror, and detects the illuminance of the external light. The illuminance sensor 15 detects the illuminance at a predetermined cycle and transmits the detected irradiation amount information to the ECU 10. In this embodiment, the illuminance information corresponds to the external environmental information.

The electronic shutter 16 is a plurality of film members, and is attached to the entire front, left-right side, and rear windshield 25 in a grid pattern. Each film member has, for example, a square shape. The transmittance of the electronic shutter 16 can be changed stepwise by applying a voltage. The electronic shutter 16 may be built in the windshield 25. That is, the windshield 25 may be configured so that the transmittance can be changed stepwise by applying a voltage.

The WSD 17 projects display light indicating various information onto the windshield 25 in front, left and right, and rear of the autonomous driving vehicle 200. As a result, the display light reflected by the electronic shutter 16 and the external light (that is, sunlight) transmitted through the electronic shutter 16 are directed to the eyes of the occupant. As a result, the occupant recognizes the display light as a virtual image displayed overlaid on the external landscape. The windshield 25 and the electronic shutter 16 function as projected members on which display light is projected. Various types of information include road information, safety information, navigation information, vehicle information, entertainment information such as movies, and the like.

The WSD 17 is configured so that the transmittance of external light can be changed by providing the windshield 25 with an electronic shutter 16. The visibility of the external landscape and the visibility of the display light by the occupant vary depending on the transmittance of the outside light.

Increasing the transmittance of the electronic shutter 16 increases the amount of external light transmitted through the windshield 25 and reduces the amount of display light reflected by the windshield 25. Therefore, the visibility of the external landscape is high, and the visibility of the display light is low. When the transmittance of the electronic shutter 16 is set to 100%, the occupant cannot see the display light.

Further, when the transmittance of the electronic shutter 16 is lowered, the amount of external light transmitted through the windshield 25 is reduced, and the amount of display light reflected by the windshield 25 is increased. Therefore, the visibility of the external landscape is low, and the visibility of the display light is high. When the transmittance of the electronic shutter 16 is set to the lowest value (specifically, a value close to 0%), the external light transmitted through the windshield 25 is almost eliminated. As a result, the interior of the vehicle becomes dark, and the occupant visually recognizes the display light projected on the windshield 25. That is, by making the transmittance of the electronic shutter 16 close to 0, the interior of the vehicle can be darkened and the windshield 25 can be used as a screen.

Further, the electronic shutter 16 can adjust the transmittance for each film member. Therefore, it is not necessary to adjust the entire windshield 25 to the same transmittance, and the windshield 25 can be divided into a plurality of regions and the transmittance can be adjusted for each region. Therefore, it is possible to reduce the transmittance in the region where the outside light reaches the eyes of some of the occupants among the plurality of occupants, and not to change the transmittance in the other regions.

The illuminator 18 is mounted in the center and above the vehicle width direction, for example, inside the front windshield 25. The illuminator 18 includes a plurality of light emitting members such as LEDs, and when the selected light emitting member among the plurality of light emitting members is turned on, the face of the selected occupant among the plurality of occupants is irradiated with light. ..

The ECU 10 includes a CPU 10a, a ROM 10b, a RAM 10c, an I / O, and the like, and the CPU 10a executes various programs stored in the ROM 10b to perform a transmittance control unit, a biological information acquisition unit, a drowsiness determination unit, and an awakening determination unit. , The functions of the external information acquisition unit, the lighting control unit, and the image display unit are realized.

The ECU 10 determines the state of each occupant using the acquired biological information, controls the transmittance of the WSD 17 (that is, the transmittance of the electronic shutter 16) according to the determined state of each occupant, and controls each occupant. Build a cabin environment suitable for the condition of. Here, three modes are assumed as the occupant's state: a sleep mode in which the occupant falls asleep, a sleep mode in which the occupant is in a sleep state, and an awakening mode in which the occupant is awakened. Further, the awakening mode includes a normal awakening mode and an emergency awakening mode for awakening in an emergency. Further, the ECU 10 has a function of Artificial Intelligence, learns the usage pattern of the passenger compartment for each occupant, and constructs a more suitable passenger compartment environment for each occupant. In this embodiment, the ECU 10 corresponds to a vehicle display control device.

<2. Vehicle interior environment control processing>
Next, the vehicle interior environment control process executed by the ECU 10 will be described with reference to the flowcharts of FIGS. 3 to 9.

First, in S10, the facial expression, body temperature, and heartbeat of each occupant are acquired, and it is determined whether or not the drowsiness of each occupant is detected based on the acquired facial expression, body temperature, and heartbeat of each occupant. If it is determined in S10 that the drowsiness of each occupant is not detected, the process proceeds to the process of S20, and if it is determined that the drowsiness of each occupant is detected, the process proceeds to the process of S50.

In S20, it is determined whether or not any of the occupants has instructed the ECU 10 to fall asleep mode to put the occupant to sleep. The sleep onset mode may be instructed by any means such as switch input, touch panel input, and voice input. If it is determined in S20 that the sleep onset mode is instructed, the process proceeds to S50, and if it is determined that the sleep onset mode is not instructed, the process proceeds to S30.

In S30, it is determined whether or not to recommend a nap to each occupant based on the schedule after each occupant gets off. The schedule after each occupant's disembarkation may be input by each occupant, or the ECU 10 and each occupant's smartphone may be linked and the ECU 10 may automatically acquire the schedule from the smartphone. Further, the AI function of the ECU 10 may be the result of learning from the past actions of each occupant.

The ECU 10 recommends a nap when each occupant performs a high-load work such as a long-time meeting after getting off the vehicle, and does not recommend a nap when resting at home. If it is determined in S30 that nap is recommended, the process proceeds to S50, and if it is determined that nap is not recommended, the process proceeds to S40.

In S40, the normal mode is turned on. Specifically, the transmittance of the WSD is set to the standard transmittance so that the occupant can recognize the display light displayed superimposed on the external landscape.
On the other hand, in S50, it is determined whether or not it is possible to safely take a nap to the set destination. Specifically, road information, weather information, and the like are acquired by wireless communication with the information center, and it is determined whether or not the vehicle can travel to the destination by level 4 automatic driving. In S50, if it is determined that the nap cannot be safely performed, the process proceeds to S40, and if it is determined that the nap can be safely performed, the process proceeds to S60.

In S60, the sleep onset mode is turned on and the flowchart shown in FIG. 4 is executed. First, in S200, it is determined whether or not the occupant who falls asleep is a part of the occupant. In S200, if it is determined that all the occupants fall asleep, the process proceeds to S210, and if it is determined that some occupants fall asleep, the process proceeds to S220.

In S210, the sleep onset process shown in the flowchart of FIG. 5 is executed in the entire area of the WSD 17, that is, the entire windshield 25. Specifically, in S500, the transmittance is lowered in the entire region of WSD17. As a result, less outside light enters the vehicle interior and the vehicle interior becomes dark. In the sleep onset mode, the transmittance of the WSD 17 is lowered to reduce the external light reaching the occupant's eyes and encourage the occupant to fall asleep.

On the other hand, in S220, the sleep onset process shown in the flowchart of FIG. 5 is executed in a part of the WSD17. Specifically, in S500, the transmittance of a part of the WSD17 is lowered. A part of the WSD17 is a part of the WSD17 corresponding to a sleeping occupant, and is a part where the outside light reaches the eyes of the occupant. This reduces the external light that reaches the eyes of the occupants who fall asleep, but does not reduce the external light that reaches the eyes of other occupants.

Returning to the flowchart of FIG. 3, in S70, the facial expression, body temperature, and heartbeat of each occupant are acquired, and it can be confirmed that the occupant who has entered the sleep onset mode has slept based on the acquired facial expression, body temperature, and heartbeat of each occupant. Determine if it is. If it is determined in S70 that sleep has not been confirmed, the process proceeds to S80, and if it is determined that sleep has been confirmed, the process proceeds to S100.

In S80, the transmittance of WSD17 is adjusted in order to encourage the occupant who has entered the sleep onset mode but is not sleeping to sleep. Specifically, a plurality of regions are set in the WSD 17, and the transmittance is changed with time for each set region. For example, as shown in FIG. 10, a plurality of regions divided in the vehicle width direction are set in the WSD 17, and the transmittances of the adjacent regions are set to different transmittances. As shown in FIG. 10, at one point in time, the transmittances of the six regions were set to low, medium, high, low, medium, and high, and at the next time point, the transmittances of the six regions were set to medium, high, and low. , Medium, high, low. In this way, the transmittance of each region is adjusted so that regions having different transmittances appear to move in the vehicle width direction. Alternatively, in order to encourage the occupant who has entered the sleep onset mode to sleep, an image that induces drowsiness is displayed on the WSD17 that has become a screen with the transmittance of the WSD17 set to the minimum value.

Subsequently, in S90, as in S70, it is determined whether or not it has been confirmed that the person has slept. If it is determined in S90 that the sleep has not been confirmed, the occupant is given up sleeping, the process proceeds to S40, and the normal mode is turned on. On the other hand, if it is determined in S90 that the sleep has been confirmed, the process proceeds to S100.

Further, in S100, the sleep mode is turned on and the flowchart shown in FIG. 4 is executed. First, in S200, it is determined whether or not the sleeping occupant is a part of the occupant. In S200, if it is determined that all the occupants are sleeping, the process proceeds to S210, and if it is determined that some occupants are sleeping, the process proceeds to S220.

In S210, the sleep process shown in the flowchart of FIG. 6 is executed in the entire area of WSD17. Specifically, in S600, the transmittance is lowered in the entire region of WSD17 as compared with the sleep onset mode. That is, in the sleep mode, the passenger compartment is darker than in the sleep onset mode so that the occupant can get a comfortable sleep.

On the other hand, in S220, the sleep process shown in the flowchart of FIG. 6 is executed in a part of the WSD17. Specifically, in S600, the transmittance of the portion of WSD17 corresponding to the sleeping occupant is lowered as compared with the sleep onset mode. As a result, the external light that reaches the eyes of the sleeping occupant is further reduced as compared with the sleep mode, but the external light that reaches the eyes of other occupants is not reduced.

Subsequently, the processes S110 to S140 and the processes S150 are executed in parallel. In S110, the facial expression, body temperature, and heartbeat of each occupant are acquired, and the sleep state of the occupant who has entered the sleep mode is confirmed based on the acquired facial expression, body temperature, and heartbeat of each occupant.

Subsequently, in S120, it is determined whether or not the sleeping occupant has taken a sufficient nap. For example, if a deep sleep is taken for a period of about 15 minutes, it is determined that a sufficient nap has been taken. If it is determined in S120 that a sufficient nap has not been taken, the process proceeds to the process of S130, and if it is determined that a sufficient nap has been taken, the process proceeds to the process of S140.

In S130, it is determined whether or not a nap can be safely taken to the destination. If it is determined in S130 that a nap can be taken, the process returns to the process of S110, and if it is determined in S130 that the nap cannot be taken, the process proceeds to the process of S140.

In S140, the normal awakening mode is turned on and the flowchart shown in FIG. 4 is executed. If you sleep for too long, you may not be able to return to driving immediately after waking up. Therefore, when the occupant can take a sufficient nap, the occupant is awakened. First, in S200, it is determined whether or not the occupant to be awakened is a part of the occupant. In S200, if it is determined to awaken all the occupants, the process proceeds to S210, and if it is determined to awaken some occupants, the process proceeds to S220.

In S210, the awakening process shown in the flowchart of FIG. 7 is executed in the entire area of WSD17. Specifically, in S300, the entire illuminator 18 is turned on to irradiate the faces of all the occupants with light.

Subsequently, in S310, the transmittance is increased to the standard transmittance in the entire region of WSD17. That is, the sleep mode is shifted to the normal mode. In this case, the transmittance may be gradually increased, or the transmittance may be increased to the standard transmittance at once. This increases the amount of outside light that reaches each occupant's eyes.

On the other hand, in S220, the awakening process shown in the flowchart of FIG. 7 is executed in a part of the WSD17. Specifically, in S300, the portion of the illuminator 18 corresponding to the awakening occupant is turned on, and the light is irradiated toward the face of the awakening occupant. No light is applied to the faces of occupants who are not awakened.

Subsequently, in S310, the transmittance of the portion of the WSD 17 corresponding to the awakening occupant is increased to the standard transmittance. The transmittance of the portion of WSD17 corresponding to the unawakened occupant is not changed.

If the occupant other than the driver is awake and the driver is asleep, the occupant other than the driver is notified that the driver needs to be awakened, and the occupant other than the driver is awakened. You may get it. In this case, instead of irradiating the light with the illuminator 18, an occupant other than the driver is asked to wake up the driver. Increase the transmittance of WSD17. The notification to the occupants other than the driver may be notified by voice, or may be displayed and notified by WSD17.

Here, in S210 and S220, the flowchart shown in FIG. 8 may be executed instead of the flowchart shown in FIG.
First, the S700 acquires illuminance information and determines whether the illuminance is daytime or nighttime, that is, whether or not there is sunlight, depending on whether or not the illuminance is larger than the first threshold value. In S700, if it is determined that the illuminance is equal to or higher than the first threshold value, the process proceeds to S710, and if it is determined that the illuminance is less than the first threshold value, the process proceeds to S730.

In S710, all or part of the illuminator 18 is turned on to irradiate all or part of the occupant's face with light.
Subsequently, in S720, the transmittance of all or part of WSD17 is increased to increase the light that reaches the eyes of all or part of the occupants. When the illuminance is equal to or higher than the first threshold value, the light of the illuminator 18 is weaker than the outside light. Therefore, the occupant can be comfortably awakened by allowing the light of the illuminator 18 to reach the occupant's eyes first. Can be made to.

On the other hand, in S730, the transmittance of all or part of WSD17 is increased to increase the light that reaches the eyes of all or part of the occupants.
Subsequently, in S740, all or part of the illuminator 18 is turned on to irradiate the faces of all or part of the occupants with light. When the illuminance is less than the first threshold value, the outside light is weaker than the light of the illuminator 18, so that the occupant can be comfortably awakened by allowing the outside light to reach the occupant's eyes first. it can.

Returning to the flowchart of FIG. 3, in S150, it is determined whether or not there is a need for an emergency stop. Specifically, the detection information by the peripheral monitoring sensor 11 is used to determine whether or not the distance to the obstacle in front approaches the threshold value at which the emergency brake is activated. Alternatively, it is determined whether or not an emergency brake signal has been output. If it is determined in S150 that there is no need for an emergency stop, the process of S150 is repeatedly executed. If it is determined in S150 that an emergency stop is necessary, the process proceeds to S160.

In S160, the emergency awakening mode is turned on, and the emergency awakening process shown in the flowchart of FIG. 9 is executed. Specifically, in S400, the entire illuminator 18 is turned on to irradiate light, and at the same time, the transmittance of the entire region of WSD 17 is increased to 100% at once. As a result, the interior of the vehicle becomes bright at once. That is, in the event of an emergency of the autonomous driving vehicle 200, priority is given to promptly awakening the occupant rather than comfortably awakening the occupant. This is the end of this process.

<3. Effect>
According to the first embodiment described above, the following effects can be obtained.
(1) The transmittance of WSD17 is reduced in order to promote the sleep of the occupants. By lowering the transmittance of WSD17, the incident of sunlight into the vehicle interior is suppressed. Therefore, the occupant can fall asleep quickly and take a nap in the passenger compartment.

(2) The transmittance of WSD is increased in order to promote the awakening of the occupants. Increasing the transmittance of WSD increases the incidence of sunlight into the vehicle interior. As a result, the occupant can be awakened.

(3) The biological information of the occupant is detected, and it is determined whether or not the occupant is in a state of drowsiness by using the detected biological information. Then, when it is determined that the occupant is in a state of drowsiness, the transmittance of WSD17 is lowered. Therefore, when the occupant is drowsy, it is possible to automatically construct a vehicle interior environment in which it is easy to fall asleep.

(4) Using the biological information, it is determined whether or not the occupant is in a state of awakening. When it is determined that the occupant is awakened, the transmittance of WSD17 is increased. Therefore, when the occupant is in a state to be awakened, it is possible to automatically construct a vehicle interior environment in which the occupant can easily awaken. In addition, it is possible to suppress the occurrence of a situation in which the driver sleeps too much and cannot return to driving.

(5) When it is determined that the occupant is awakened, the transmittance of the WSD 17 is increased after the light of the illuminator 18 is irradiated. As a result, the burden on the occupant can be suppressed and the occupant can be awakened comfortably.

(6) When there is sunlight irradiation, the transmittance of WSD 17 is increased after irradiating the light of the illuminator 18 which is weaker than the outside light. On the other hand, when there is no irradiation of sunlight, the light of the illuminator 18 stronger than the outside light is irradiated after the transmittance of the WSD 17 is increased. As a result, the burden on the occupant can be suppressed according to the external environment, and the occupant can be comfortably awakened.

(7) In an emergency, the transmittance of WSD 17 is increased to 100% at once at the same time as the light of the illuminator 18. As a result, the interior of the vehicle becomes bright at once, so that the occupants can be awakened quickly.

(8) By controlling the transmittance of the WSD 17 at the corresponding portion for each occupant, it is possible to promote sleep or awakening for each occupant. As a result, it does not cause discomfort to occupants who do not need to promote sleep or awakening.

(9) By irradiating the light of the illuminator 18 for each occupant, there is no discomfort to the occupant who does not need to be awakened.
(10) By changing the transmittance for each region of WSD17 with time, it is possible to encourage the occupant to sleep. In particular, when there is an afterload schedule after the occupant gets off, the occupant can be encouraged to sleep and the occupant can effectively take a nap.

(11) By lowering the transmittance of WSD17 to the minimum value, making WSD17 a screen, and displaying an image that induces drowsiness, it is possible to encourage the occupant to sleep.
(Second Embodiment)
<1. Differences from the first embodiment>
Since the basic configuration of the second embodiment is the same as that of the first embodiment, the common configuration will be omitted and the differences will be mainly described. The same reference numerals as those in the first embodiment indicate the same configurations, and the preceding description will be referred to.

In the first embodiment described above, in the awakening process, the transmittance of the region corresponding to the occupant to be awakened in WSD17 is increased to the standard transmittance. On the other hand, in the second embodiment, as shown in FIG. 11, in the awakening process, the transmittance of the eye-corresponding region 40 of the WSD 17 is fixed at a value at which the illuminance required for awakening can be obtained, and the eye-corresponding region of the WSD 17 is obtained. It differs from the first embodiment in that the transmittance of the region other than 40 is increased to the standard transmittance. The eye-corresponding area 40 is an area corresponding to the awakening occupant's eye area 30.

In this embodiment, the biometric information includes the occupant's eye area 30. The ECU 10 acquires the eye region 30 from the face image taken by the DSM 14. In the present embodiment, the DSM 14 corresponds to the observation device, and the face image corresponds to the observation information.

<2. Awakening process>
Next, in the present embodiment, the awakening process executed by the ECU 10 will be described. In the present embodiment, the ECU 10 executes the same processing as in the first embodiment except for the processing of S140 in the vehicle interior environment control processing.

In this embodiment, the ECU 10 executes the flowchart shown in FIG. 4 when the normal awakening mode is turned on in S140. Then, in S210 and S220, the awakening process shown in FIG. 12 is executed.

First, in S800, the transmittance of WSD17 is gradually increased.
Subsequently, in S810, the illuminance information is acquired, and it is determined whether or not the illuminance at the position of the occupant's face to be awakened, that is, the illuminance in the vehicle interior is equal to or higher than the second threshold value. The second threshold is larger than the first threshold and smaller than the reference value. The second threshold is the illuminance required for the awakening of the occupant, for example, 2500 lx. In S810, if it is determined that the illuminance in the vehicle interior is equal to or higher than the second threshold value, the process proceeds to S820, and if it is determined that the illuminance in the vehicle interior is less than the second threshold value, the process returns to S800.

In S820, the eye region 30 is acquired from the facial image of the occupant to be awakened, the transmittance of the eye-corresponding region 40 of the WSD 17 corresponding to the eye region 30 is fixed, and the transmittance is not increased from that value. That is, the transmittance is fixed when the transmittance of the eye-corresponding region 40 of the WSD 17 reaches the second threshold value. The eye-corresponding region 40 is the incident range of the external light in the WSD 17, and corresponds to the incident range of the external light reaching the occupant's eye region 30. Further, in S820, as shown in FIG. 11, the transmittance of the region other than the eye-corresponding region 40 in WSD17 is increased to the reference value.

In this way, by suppressing the illuminance of the outside light that reaches the occupant's eye region 30 to the minimum level at which the illuminance required for awakening can be obtained, it is possible to prevent the occupant's eye region 30 from suddenly brightening. .. As a result, it is possible to prevent the occupant from being dazzled by the sudden change in brightness. When it is necessary to switch the driving to the occupant after the occupant is awakened, the transmittance of the eye-corresponding region 40 of the WSD 17 may be gradually increased from a fixed value to a reference value. Further, when it is not necessary to switch the driving to the occupant after the occupant is awakened, the transmittance of the eye-corresponding region 40 of the WSD 17 may be maintained at a fixed value.

Further, in S210 and S220, the flowchart shown in FIG. 13 may be executed instead of the flowchart shown in FIG.
First, in S900 to S920, the same processing as in S700 to S720 of the flowchart shown in FIG. 8 is executed.

Subsequently, in S930, the illuminance information is acquired, and it is determined whether or not the illuminance at the position of the occupant's face to be awakened, that is, the illuminance in the vehicle interior is equal to or higher than the second threshold value. The illuminance in the vehicle interior here corresponds to the combined illuminance of both the external light incident from the WSD 17 and the irradiation light emitted from the illuminator 18.

In S930, if it is determined that the illuminance in the vehicle interior is equal to or higher than the second threshold value, the process proceeds to S940, and if it is determined that the illuminance in the vehicle interior is less than the second threshold value, the process returns to S920.

In S940, the same processing as in S820 of the flowchart shown in FIG. 12 is executed. As a result, the total illuminance of the outside light incident on the vehicle interior from the WSD 17 and the irradiation light of the illuminator 18 is suppressed to the minimum necessary for awakening the occupant.

Further, in S950 and S960, the same processing as in S730 and S740 in the flowchart shown in FIG. 8 is executed. That is, in the flowchart shown in FIG. 13, a combination of the flowchart shown in FIG. 8 and the flowchart shown in FIG. 12 is executed.

According to the second embodiment described above, in addition to the effects (1) to (4) and (6) to (11) of the first embodiment, the following effects can be obtained.
(12) When the occupant is awake, the illuminance of the light that reaches the occupant's eye area 30 is suppressed to the minimum necessary for the occupant's awakening, so that the occupant feels a sudden change in brightness and is dazzled. Can be suppressed.

(Other embodiments)
Although the embodiment for carrying out the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment, and can be implemented in various modifications.

(A) In the above embodiment, the illuminance amount information detected by the illuminance sensor 15 is used to determine whether it is daytime or nighttime, but the present disclosure is not limited to this. For example, the ECU 10 may determine whether it is daytime or nighttime from the date and the current time. Alternatively, the ECU 10 may acquire illuminance amount information by wireless communication with an information center or a roadside machine.

(B) The vehicle display control device and methods thereof described in the present disclosure are provided by configuring a processor and memory programmed to perform one or more functions embodied by a computer program. It may be realized by a dedicated computer. Alternatively, the vehicle display control device and its method described in the present disclosure may be realized by a dedicated computer provided by configuring a processor with one or more dedicated hardware logic circuits. Alternatively, the vehicle display control device and its method described in the present disclosure comprises a processor and memory programmed to perform one or more functions and a processor composed of one or more hardware logic circuits. It may be realized by one or more dedicated computers configured by a combination. The computer program may also be stored on a computer-readable non-transitional tangible recording medium as an instruction executed by the computer. The method for realizing the functions of each part included in the vehicle display control device does not necessarily include software, and all the functions may be realized by using one or more hardware.

(C) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. .. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

(D) In addition to the above-mentioned vehicle display control device, a system having the vehicle display control device as a component, a program for operating a computer as the vehicle display control device, a semiconductor memory recording this program, and the like. The present disclosure can also be realized in various forms such as a non-transitional actual recording medium and a display control method in a vehicle.

10 ... ECU, 12 ... IR sensor, 13 ... heart rate sensor, 15 ... illuminance sensor, 16 ... electronic shutter, 18 ... illuminator, 20 ... biosensor, 25 ... windshield, 100 ... vehicle interior environment construction system, 200 ... automatic Driving vehicle.

Claims (13)

A vehicle display control device (10) mounted on an autonomous driving vehicle (200) provided with a windshield display (17).
The windshield display is configured so that the transmittance of external light can be changed.
A transmittance control unit (S500, S600) configured to reduce the transmittance is provided in order to promote the sleep of at least one occupant.
Display control device for vehicles. The transmittance control unit (S310, S720, S730, S400, S800, S820, S920, S940, S950) is further configured to increase the transmittance in order to promote the awakening of at least one occupant. Yes,
The vehicle display control device according to claim 1. The self-driving vehicle comprises biosensors (12, 13, 14) configured to detect biometric information of at least one occupant.
The vehicle display control device is
A biological information acquisition unit (S10) configured to acquire detection information by the biological sensor, and
A drowsiness determination unit (S10) configured to determine whether or not at least one occupant is suffering from drowsiness by using the detection information acquired by the biometric information acquisition unit is provided.
The transmittance control unit is configured to reduce the transmittance when the drowsiness determination unit determines that at least one occupant is suffering from drowsiness.
The vehicle display control device according to claim 1 or 2. The self-driving vehicle comprises a biosensor configured to detect biometric information of at least one occupant.
The vehicle display control device is
A biological information acquisition unit (S110) configured to acquire detection information by the biological sensor, and
It is provided with an awakening determination unit (S120, S130, S150) configured to determine whether or not the at least one occupant is in a state of awakening by using the detection information acquired by the biological information acquisition unit.
The transmittance control unit is configured to increase the transmittance when the awakening determination unit determines that at least one occupant is in a state of awakening.
The vehicle display control device according to any one of claims 1 to 3. The self-driving vehicle includes an observation device (14) configured to observe at least one occupant.
It is equipped with an illuminance meter (15) installed in the passenger compartment and configured to detect illuminance.
The vehicle display control device is
The eye detection unit (S820, S940) configured to detect the eye region of at least one occupant from the observation information by the observation device is provided.
When the transmittance is increased, the transmittance control unit (S820, S940) determines that the illuminance detected by the illuminometer reaches a set value, and the eye-corresponding region of the windshield display. It is configured to fix the transmittance, and the eye-corresponding region corresponds to the eye region detected by the eye detection unit.
The vehicle display control device according to claim 4. The transmittance control unit (S820, S940) is configured to increase the transmittance in a region other than the eye-corresponding region of the windshield display when the transmittance is increased.
The vehicle display control device according to claim 5. The self-driving vehicle includes an illuminator (18).
The vehicle display control device is
A lighting control unit (S300) configured to irradiate the light of the illuminator toward the at least one occupant when the awakening determination unit determines that the at least one occupant is in a state of awakening. Prepare,
The transmittance control unit (S310) is configured to increase the transmittance after the illumination control unit irradiates the light of the illuminator.
The vehicle display control device according to any one of claims 4 to 6. The self-driving vehicle is equipped with an illuminator.
The vehicle display control device is
An external information acquisition unit (S700) configured to acquire environmental information outside the vehicle,
Lighting control units (S710, S740) configured to irradiate the light of the illuminator toward the at least one occupant when the awakening determination unit determines that the at least one occupant is in a state of awakening. ), And
The transmittance control unit (S720, S730) responds to the environmental information acquired by the external information acquisition unit, either after the illumination control unit irradiates the light of the illuminator or before the irradiation. , Which is configured to increase the transmittance,
The vehicle display control device according to any one of claims 4 to 6. The transmittance control unit (S400) raises the transmittance at the same time as the illumination control unit irradiates the light of the illuminator in an emergency of the autonomous driving vehicle.
The vehicle display control device according to claim 7 or 8. The at least one occupant includes a plurality of occupants.
The transmittance control units (S210, S220) are configured to control the transmittance of the occupant-corresponding region corresponding to each occupant of the windshield display according to the respective states of the plurality of occupants. ,
The vehicle display control device according to any one of claims 1 to 9. The at least one occupant includes a plurality of occupants.
The lighting control unit (S210, S220) is configured to irradiate each occupant with light from an occupant-corresponding area corresponding to each occupant of the illuminator according to each state of the plurality of occupants. Yes,
The vehicle display control device according to any one of claims 7 to 9. The transmittance control unit (S80) is configured to set a plurality of areas on the windshield display in order to promote sleep of at least one occupant, and to change the transmittance with time for each set area. Has been
The vehicle display control device according to any one of claims 1 to 11. In order to promote the sleep of at least one occupant, the windshield display is provided with an image display unit (S80) configured to display an image that induces drowsiness.
The vehicle display control device according to any one of claims 1 to 11.