JP4858094B2 - Display display system - Google Patents

Description

  The present invention relates to a display display system.

  Conventionally, in a navigation device mounted on a vehicle such as an automobile, when an operator such as a driver operates a predetermined input unit to set a destination, based on the destination and the current position of the vehicle, A route from the current position to the destination is searched, and the searched route and the estimated arrival time at the destination are displayed on the display for guidance.

In addition, a technique has also been proposed in which meters such as a speedometer and a fuel meter are displayed side by side with a route on the display, and the display contents are switched between when the vehicle is stopped and when the vehicle is running (for example, , See Patent Document 1).
JP-A-11-51686

  However, in the conventional navigation device, the display content of the display is changed according to the state of the vehicle, but the state of the driver who drives the vehicle is not taken into consideration. For example, when the driver's arousal level is high, various information displayed on the display can be accurately recognized, so a lot of information is displayed or displayed in a manner according to the driver's preference. Can be made. On the other hand, when the driver's arousal level is low, it becomes difficult to accurately recognize a large amount of information at a time. Therefore, the most important information, for example, the vehicle speed is displayed in an easy-to-recognize manner, and the degree of importance is low. It is desirable to reduce or omit the display of information. However, in the conventional navigation device, since the driver state cannot be grasped, the display mode of the display cannot be adapted to the driver state.

  The present invention can display the necessary information in an appropriate display mode corresponding to the driver state by solving the conventional problems and controlling the display mode of the display according to the driver state. An object of the present invention is to provide a display system that allows a driver to recognize information accurately.

Therefore, in the display display system of the present invention, a display that displays vehicle information, an information acquisition unit that acquires the vehicle information and driver information of a driver who drives the vehicle, and driving based on the driver information. A state determination unit that determines the driver state, a display determination unit that determines a display mode of the vehicle information corresponding to the determined driver state, and a display that controls the display operation of the display so as to be the determined display mode A control unit, and a learning unit that stores the learned data in a learning database, wherein the information acquisition unit is included in the number of discontinuous steerings as steering information included in the vehicle information and the driver information A driver's closed eye time is acquired, and the learning unit associates the number of discontinuous steering operations with the closed eye time in advance and stores and stores it in a learning database. And data indicating an average correlation between the closed eye time and the state determination unit acquires data indicating a correlation between the discontinuous steering number and the closed eye time acquired by the information acquisition unit, and the data based on the difference between the data indicating the average correlation, to determine the arousal degree of the driver.

  According to this invention, a display display system controls the display mode of a display according to a driver | operator state. Accordingly, necessary information can be displayed in an appropriate display mode corresponding to the driver state. Therefore, the driver can recognize the information accurately.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a display display system according to the first embodiment of the present invention.

  In the figure, reference numeral 10 denotes a display display system according to an embodiment of the present invention, which will be described later as an HMI (Human Machine Interface) such as an electronic meter for a vehicle mounted on a vehicle such as a passenger car, a truck, a bus, and a motorcycle. The display mode of the display 31 is controlled. The display display system 10 includes a navigation device 11, a vehicle ECU (Electronic Control Unit) 21, a camera 22, a line-of-sight detection function unit 23, a radar 24, and a radar information acquisition unit 25.

  The navigation device 11 is a vehicle navigation device mounted on the vehicle, and is a kind of computer that includes arithmetic means such as a CPU and MPU, storage means such as a semiconductor memory, a magnetic disk, and an optical disk, and a communication interface. The navigation device includes a GPS (Global Positioning System), a geomagnetic sensor, a distance sensor, a steering sensor, a beacon sensor, a gyro sensor, a current position detection processing unit that detects a current position, map data including road data, search data, and the like A data storage unit as a storage means for storing a route, a route search process for searching for a route to a set destination based on input information, a route guidance process, and a POI (Point for searching for points and facilities) of Interest) A route to a set destination having a navigation processing unit that performs various arithmetic processing such as navigation processing such as search processing, an input unit, a display unit, a voice input unit, a voice output unit, a communication unit, etc. Search for and give guidance.

  The data storage unit stores map data as information used for searching. That is, the data storage unit includes a database including various data files, and in addition to search data for searching for a route, the display unit displays a guide map along the searched route, In order to display guidance information, various data such as facility data are stored. Note that the data storage unit also includes information regarding links, which are units constituting a road. The data storage unit also stores various data for outputting predetermined information by the audio output unit.

  The input unit is for correcting a position at the start of traveling or inputting a destination, such as an operation key, a push button, a jog dial, a cross key, etc. arranged in the navigation device body. However, it may be a remote controller. When the display unit is a touch panel, it is preferable that the display unit includes operation switches such as operation keys and operation menus displayed on the display screen of the display unit. In this case, an input can be performed by pressing, that is, touching, the operation switch like a normal touch panel.

  The display unit displays operation guidance, an operation menu, operation key guidance, a route from the current position to the destination, guidance information along the route, and the like. As the display unit, a CRT, a liquid crystal display, an LED (Light Emitting Diode) display, a plasma display, a hologram device that projects a hologram on a windshield, or the like can be used.

  The display unit may be configured integrally with the display 31. Here, the display 31 mainly functions as an electronic meter indicating the state of the vehicle, and the display unit Is described as being configured separately from the display 31.

  The communication unit includes VICS (R) (Vehicle Information & Communication System) information, RDS-TMC (Radio Data System-Traffic Message Channel: traffic information service by FM multiplex broadcasting) information, police, Collect information on the traffic control system of the Japan Highway Public Corporation. Further, the communication unit may search for travel history information of the probe car, statistical traffic information, information on weather conditions, etc. by communicating with an information center provided with an Internet server, a navigation server, etc. desirable.

  The vehicle ECU 21 is a kind of computer that includes arithmetic means such as a CPU and MPU, storage means such as a semiconductor memory, a magnetic disk, and an optical disk, a communication interface, and the like, and is communicably connected to the navigation device 11. The vehicle ECU 21 acquires information indicating the state of each part of the vehicle, such as vehicle speed, engine speed, intake air temperature, exhaust gas temperature, cooling water temperature, wheel speed, remaining fuel amount, and the like. Controls the operation of various parts of the vehicle, such as machines, brakes, and suspensions. In the embodiment of the present invention, the vehicle ECU 21 provides vehicle information such as a vehicle speed, an engine speed, and a fuel remaining amount displayed on the display 31 in addition to vehicle information such as steering information. Send to.

  The camera 22 includes an image sensor such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and is disposed inside the vehicle to photograph the driver. In this case, it is desirable to irradiate the driver with infrared light and acquire an image of the driver's face with the camera 22. The line-of-sight detection function unit 23 includes a calculation unit such as a CPU and an MPU, a semiconductor memory, and the like. The line-of-sight detection function unit 23 is a kind of computer attached to the camera 22 and is based on the driver's face image acquired by the camera 22. Then, it is determined whether or not the driver closes his eyes. For example, the driver's face image is processed to extract the area around the eye, and if the eyelid is closed, it is determined that the eye is closed, that is, the eye is closed, and the eyelid is open. If the eye is open, that is, it is determined that the eye is open. Then, the line-of-sight detection function unit 23 transmits the determination result as driver information that is information indicating the driver state. The camera 22 and the line-of-sight detection function unit 23 function as an information acquisition unit.

  Further, the radar 24 is a distance measurement radar such as a laser radar or a millimeter wave radar attached to the front surface of the vehicle body, and is a device for measuring a distance to another vehicle traveling in front of the vehicle. When measuring the distance to other vehicles traveling behind the vehicle, the radar 24 is also attached to the rear surface of the vehicle body. The radar information acquisition unit 25 includes a calculation unit such as a CPU and an MPU, a semiconductor memory, and the like. The radar information acquisition unit 25 is a kind of computer attached to the radar 24, and based on a radar wave signal acquired by the radar 24, A distance to another vehicle traveling in front of or behind the vehicle is calculated. Then, the radar information acquisition unit 25 transmits the calculated distance to another vehicle as vehicle peripheral information. The radar 24 and the radar information acquisition unit 25 function as an information acquisition unit.

  In the embodiment of the present invention, the camera 22 and the radar 24 are communicably connected to the navigation device 11 via the line-of-sight detection function unit 23 and the radar information acquisition unit 25. The navigation device 11 controls the display mode of the display 31 according to the driver state based on the information acquired from the vehicle ECU 21, the line-of-sight detection function unit 23, and the radar information acquisition unit 25, and corresponds to the driver state. Necessary information is displayed on the display 31 in the appropriate display mode.

  Therefore, the navigation device 11 includes a display determination unit 12 that executes a display determination process for determining the display mode of the display 31 from the viewpoint of function, and an awakening for determining a driver's awakening degree as a driver state. It has an awakening determination unit 13 as a state determination unit that performs the determination, and an arousal degree learning database 14 that stores data relating to the driver's arousal level learned in advance. Further, the navigation device 11 includes a vehicle state determination unit as a state determination unit that determines the vehicle state based on the acquired vehicle information, and a vehicle as a state determination unit that determines the vehicle peripheral state based on the acquired vehicle peripheral information. A peripheral state determination unit, a wakefulness learning unit that learns the driver's wakefulness, and a display control unit that controls the display operation of the display 31 are included.

  Here, the display determination unit 12 calculates a determination value corresponding to the vehicle state, the driver state, the vehicle peripheral state, and the like determined based on the vehicle information, the driver information, the vehicle peripheral information, and the like. The display mode of the display 31 is determined according to the above. In the embodiment of the present invention, the remaining amount of fuel is used as vehicle information, the driver's eyes closed time and the number of discontinuous steering operations are used, and the distance to other vehicles is used as vehicle peripheral information. An example will be described in which the remaining fuel degree is used as the vehicle state, the awakening degree is used as the driver information, and the vacancy degree is used as the vehicle peripheral state. The remaining fuel level is a state quantity that indicates how much fuel is left, the awakening degree is a state quantity that indicates how much the driver is awake, and the empty degree is how much the vehicle is free. It is a state quantity that means. In this case, the display determination unit 12 converts the remaining fuel degree, the awakening degree, and the empty degree into corresponding determination values, respectively, according to a table for associating with predetermined determination values.

  Further, in the embodiment of the present invention, a case where a speed meter indicating the vehicle speed, a tachometer indicating the engine speed, and a fuel meter indicating the remaining amount of fuel are displayed on the display 31 will be described as an example. In this case, the display determination unit 12 sets the display mode of the display 31 to the normal state in which the three meters of the speedometer, the tachometer, and the fuel meter are displayed in the same manner, the vehicle speed priority state in which the speedometer is highlighted, and the tachometer. Is selected from the engine speed priority state displayed with emphasis on and the remaining fuel priority state displayed with emphasis on the fuel meter.

  The arousal determination unit 13 refers to data stored in the arousal degree learning database 14, steering information included in the vehicle information acquired from the vehicle ECU 21, and driver information acquired from the line-of-sight detection function unit 23. The degree of driver's arousal is determined based on the driver's eye closure time included in. The data stored in the arousal degree learning database 14 is an accumulation of the relationship between the number of discontinuous steerings as the driver's steering information and the eye closing time. Then, the arousal determination unit 13 calculates a regression line indicating the correlation between the obtained number of discontinuous steerings and the closed eye time, and stores it in the arousal degree learning database 14 at regular intervals (for example, every 10 seconds). The current driver's arousal level is determined on the basis of the difference from the regression line indicating the average calculated from the calculated data. The number of times of discontinuous steering is the number of times of quick steering at a certain steering angle.

  The vehicle state determination unit acquires vehicle information such as a vehicle speed, an engine speed, a remaining fuel amount, and the number of discontinuous steerings from the vehicle ECU 21. The awakening determination unit 13 acquires driver information such as the driver's eye closing time from the line-of-sight detection function unit 23. The vehicle peripheral state determination unit acquires vehicle peripheral information such as a distance from the radar information acquisition unit 25 to another vehicle. Furthermore, the display control unit controls the display operation of the display 31 so that the display mode determined by the display determination unit 12 is obtained, and the speed is set so as to indicate the vehicle speed, the engine speed, and the fuel remaining amount acquired from the vehicle ECU 21. Three meters, meter, tachometer and fuel meter are displayed. The awakening degree learning unit includes vehicle information acquired from the vehicle ECU 21, current position information acquired from the navigation processing unit, road shape information, driver information acquired from the line-of-sight detection function unit 23, and radar information acquisition unit. The vehicle periphery information acquired from 25 is stored and accumulated in the arousal degree learning database 14 as learning data. In this case, in particular, the relationship between the number of discontinuous steerings acquired from the vehicle ECU 21 and the eye closing time acquired from the line-of-sight detection function unit 23 is stored and accumulated in the arousal degree learning database 14.

  Next, the operation | movement which determines a driver | operator's arousal degree is demonstrated in detail.

  FIG. 2 is a diagram showing an operation of determining the driver's arousal level in the first embodiment of the present invention. 2A shows an average relationship between the number of discontinuous steerings and the eye closing time, FIG. 2B shows a relationship between the number of discontinuous steerings and the eye closing time in the state A, and FIG. 2C shows the discontinuity. The relationship between the number of steerings and the eye closing time in state B is shown, (d) shows the relationship between the number of discontinuous steerings and the eye closing time in state C, and (e) shows the degree of arousal in states A to C.

  First, the awakening degree learning unit obtains the number of discontinuous steerings and the closed eye time in a normal state when the vehicle is traveling in advance, stores them in the awakening degree learning database 14 and stores them in association. deep. Thereby, as shown in FIG. 2A, an average relationship between the number of discontinuous steerings and the eye closing time can be obtained. Then, a regression line indicating the correlation between the number of discontinuous steerings and the eye closing time is calculated. The regression line is a regression line indicating an average, and is shown as M in FIG. Note that the average relationship between the number of times of discontinuous steering and the eye closing time is different for each driver. Therefore, in the embodiment of the present invention, the number of times of discontinuous steering and the eye closing time in the normal state are acquired and learned in advance for each driver.

  In addition, the awakening determination unit 13 acquires the current number of discontinuous steerings and the eye closing time, and stores the correlation between the number of discontinuous steerings and the eye closing time. Then, a regression line indicating a correlation between the number of discontinuous steerings stored at fixed time intervals and the eye closing time is calculated, and the current driver's awakening is calculated based on a difference between the regression line and the regression line indicating the average. Determine the degree.

  Here, the case where the correlation between the number of times of discontinuous steering and the eye closing time is in the states A to C as shown in FIGS. 2B to 2D will be described. First, in the case of the state A as shown in FIG. 2B, since the number of discontinuous steerings is large with respect to a predetermined eye-closing time, the driver is sufficiently awakened, that is, the degree of arousal is high. I understand that. And it turns out that the inclination of the regression line shown as A in FIG.2 (b) is steeper than the regression line which shows the said average.

  In the case of the state B as shown in FIG. 2C, the number of discontinuous steerings is small with respect to a predetermined eye-closing time, so that the driver is not sufficiently awakened, that is, the degree of arousal Is low. And it turns out that the inclination of the regression line shown as B in FIG.2 (c) is looser than the regression line which shows the said average.

  Further, in the state C as shown in FIG. 2 (d), the number of discontinuous steerings is considerably small with respect to a predetermined eye-closing time, so that the driver is not awakened. Is quite low. And it turns out that the inclination of the regression line shown as C in FIG.2 (d) is considerably gentler than the regression line which shows the said average.

  Then, the driver's arousal level in the states A to C is determined as shown in FIG. That is, it can be seen that the driver's arousal level in state A is higher than average, the driver's awakening level in state B is lower than average, and the driver's awakening level in state C is considerably lower than average.

  Next, the display mode of the display 31 will be described in detail.

  FIG. 3 is a diagram showing the display mode of the display according to the first embodiment of the present invention, and FIG. 4 is a diagram showing the criteria for determining the display mode of the display according to the first embodiment of the present invention. 3, (a) shows the normal state, (b) shows the vehicle speed priority state, (c) shows the remaining fuel priority state, and (d) shows the engine speed priority state.

  The display determination unit 12 converts the wakefulness determined by the wakefulness determination unit 13 into a determination value set in advance in association with each other, and for example, converts the numerical value as an integer from 0 to 10. In this case, the determination value 0 corresponds to a dozing state, and the determination value 10 corresponds to a state where 100% is awakened.

  The display determination unit 12 converts the degree of remaining fuel determined by the vehicle state determination unit into a determination value set in advance in association with the value, and for example, converts the value to an integer from 0 to 10. In this case, the determination value 0 corresponds to a state in which the remaining fuel amount is zero, that is, the fuel tank is empty, and the determination value 10 corresponds to a state in which the remaining fuel amount is 100% and the fuel tank is full. .

  Further, the display determination unit 12 converts the degree of vacancy determined by the vehicle surrounding state determination unit into a determination value set in advance in association with the value, and for example, converts the value to an integer from 0 to 10. In this case, the determination value 0 corresponds to a state where no other vehicle is in the vicinity, and the determination value 10 corresponds to a state where the vehicle is involved in a traffic jam.

  Then, the display determination unit 12 sets the display mode of the display 31 to any one of a normal state, a vehicle speed priority state, a fuel remaining amount priority state, or an engine speed priority state as shown in FIG. 3 according to the determination value. decide. In this case, the display mode of the display 31 is determined according to the criteria as shown in FIG. In FIG. 3, S is a speedometer, T is a tachometer, and F is a fuel meter.

  When the determination value of the arousal level is low and the display determination unit 12 is considered to be in a non-awake state, the display determination unit 12 displays a high-priority information in the current driving scene, for example, FIG. The vehicle speed priority state in which the speedometer is displayed large is selected as shown in FIG. This is because the driver cannot process a lot of information when the degree of arousal is low, and it is difficult to recognize it properly, so the driver must recognize it with the highest priority according to the driving scene. This is because it is necessary to present a large amount of information that should not be. That is, the amount of information displayed on the display 31 is limited to an amount that can be processed by a driver with a low arousal level. In addition to displaying the speedometer large, a range near the speed limit (for example, speed limit ± 10 [km / h]) may be displayed large.

  In addition, when the determination value of the remaining fuel level is low and the remaining fuel level is considered to be low, the display determination unit 12 gives priority to the remaining fuel level so that the fuel meter is displayed large as shown in FIG. Select a state.

  Further, when the determination value of the degree of vacancy is low and it is considered that there is no other vehicle around the vehicle, the display determination unit 12 displays the engine speed at a large tachometer as shown in FIG. Select the priority state.

  In addition, the priority at the time of selecting a display mode is set so that it may become low in order of a vehicle speed priority state, a fuel remaining amount priority state, a rotation speed priority state, and a normal state. Therefore, for example, the vehicle speed priority state is given priority in the vehicle speed priority state and the fuel remaining amount priority state.

  Further, when the awakening level is low, the basic color tone of the display 31 can be blue. This is because blue light is said to have an awakening effect. In addition, since there is an image of “safe” in blue, it is desirable that a portion not suitable for the image is not blue. For example, only the speed limit range of the speedometer can be blue.

  Furthermore, the color tone of the display 31 may be changed to a desired color according to the driver's preference. In particular, when the driver is a color blind person, there are colors that are difficult to distinguish, so it is desirable that the driver can select the display color of the display 31 as appropriate. Furthermore, you may enable it to change arrangement | positioning of each meter according to a driver | operator's liking.

  Next, the operation of the display display system 10 having the above configuration will be described.

  FIG. 5 is a flowchart showing the operation of the display system according to the first embodiment of the present invention.

  First, the navigation device 11 acquires vehicle information from the vehicle ECU 21. Subsequently, the navigation device 11 acquires driver information from the line-of-sight detection function unit 23, and performs arousal determination for determining the driver's arousal level. Subsequently, the navigation device 11 acquires vehicle periphery information from the radar information acquisition unit 25. And the said navigation apparatus 11 implements a display determination process.

  Subsequently, the navigation device 11 determines whether or not the display mode of the display 31 determined by the display determination process is the same as the current display mode. If they are the same, the operation flow ends. If not the same, the navigation device 11 changes the display mode of the display 31 to the display mode determined by the display determination process, and ends the operation flow.

Next, a flowchart will be described.
Step S1: Obtain vehicle information.
Step S2: Obtain driver information.
Step S3: Awakening determination is performed.
Step S4: Acquire vehicle peripheral information.
Step S5: Display determination processing is performed.
Step S6: It is determined whether or not the display mode of the display 31 is the same as the current display mode. When the display mode of the display 31 is the same as the current display mode, the operation flow is terminated, and when the display mode of the display 31 is not the same as the current display mode, the process proceeds to step S7.
Step S7: The display mode of the display 31 is changed and the operation flow is terminated.

  Next, the operation of the subroutine in step S5 will be described.

  FIG. 6 is a flowchart showing the operation of the subroutine of the display determination process in the first embodiment of the present invention.

  First, the navigation apparatus 11 converts the remaining fuel degree determined based on the vehicle information acquired from the vehicle ECU 21 into a determination value. Subsequently, the navigation device 11 converts the awakening degree determined by the awakening determination into a determination value. Subsequently, the navigation device 11 converts the vacancy degree determined based on the vehicle periphery information into a determination value. And the said navigation apparatus 11 determines the display mode of the display 31 according to the said determination value, and complete | finishes a display determination process.

Next, a flowchart will be described.
Step S5-1: The remaining fuel degree is converted into a determination value.
Step S5-2: The awakening degree is converted into a determination value.
Step S5-3: The vacancy degree is converted into a determination value.
Step S5-4: The display mode of the display 31 is determined, and the display determination process is terminated.

  Thus, in embodiment of this invention, the display display system 10 controls the display mode of the display 31 according to a driver | operator state. Accordingly, necessary information can be displayed in an appropriate display mode corresponding to the driver state, and the driver can accurately recognize the information.

  For example, when the driver's awakening level is low, a speedometer as information that the driver must recognize with the highest priority is displayed large. Since the amount of information displayed on the display 31 is limited to an amount that can be processed even by a driver with a low arousal level, the driver can accurately recognize the displayed information.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  In the embodiment of the present invention, the display system 10 further includes a heartbeat detection device that detects a driver's heartbeat as driver information. The heartbeat detection device includes, for example, a sensor that detects the heartbeat of the driver disposed on the steering wheel or seat of the vehicle, and transmits the heart rate of the driver as driver information.

  And the awakening determination part 13 determines a driver | operator's arousal level based on the driver | operator's heart rate acquired from the said heart rate detection apparatus. Specifically, when the trend of heart rate increase / decrease is detected and there is a strong tendency for the heart rate to gradually decrease, the degree of arousal will decrease earlier than usual, assuming that the driver feels strong sleepiness. judge. This is because humans tend to have a lower heart rate when they become sleepy. Thereby, the display determination part 12 can control the display operation of the display 31 earlier than usual, and it can be set as the vehicle speed priority state which displays a speedometer largely, as FIG.3 (b) shows.

  Further, the driver's fatigue level can be determined based on the driver's eye-closing time and heartbeat as the driver information and the disturbance of the driving operation that can be determined from the vehicle information. In this case, the display determination unit 12 can control the display operation of the display 31 based on the determined driver's fatigue level, and the display mode of the display 31 can correspond to the driver's fatigue level.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a figure which shows the structure of the display display system in the 1st Embodiment of this invention. It is a figure which shows the operation | movement which determines the driver | operator's arousal degree in the 1st Embodiment of this invention. It is a figure which shows the display mode of the display in the 1st Embodiment of this invention. It is a figure which shows the reference | standard which determines the display mode of the display in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the display display system in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the subroutine of the display determination process in the 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display display system 12 Display determination part 13 Awakening determination part 22 Camera 23 Gaze detection function part 31 Display

Claims (6)

(A) a display for displaying vehicle information;
(B) an information acquisition unit that acquires the vehicle information and driver information of a driver who drives the vehicle;
(C) a state determination unit that determines a driver state based on the driver information;
(D) a display determination unit that determines a display mode of vehicle information corresponding to the determined driver state;
(E) a display control unit that controls the display operation of the display so as to be the determined display mode ;
(F) a learning unit that stores learned data in a learning database;
(G) The information acquisition unit acquires the number of discontinuous steerings as the steering information included in the vehicle information, and the driver's eye closure time included in the driver information,
(H) The learning unit associates the number of discontinuous steerings with the eye closing time in advance and stores and accumulates it in a learning database, and acquires data indicating an average correlation between the number of discontinuous steerings and the eye closing time,
(I) The state determination unit acquires data indicating a correlation between the number of discontinuous steerings acquired by the information acquisition unit and a closed eye time, and is based on a difference between the data and data indicating the average correlation. And a display display system for determining a driver's arousal level . The display mode according to claim 1, wherein the display mode is an arrangement and / or size of a meter that displays vehicle information. Before SL state determination unit determines the vehicle state, the display display system according to claim 1 determines the display mode of the vehicle information the display determination unit corresponding to the determined vehicle state. The information acquiring unit acquires the vehicle surrounding information, the state determination unit determines the vehicle ambient conditions, to determine Claim 3 a display mode of the display determination unit vehicle information corresponding to the vehicle surroundings state determined The display display system described. The display display system according to claim 4 , wherein the display determination unit determines the display mode of the vehicle information by giving priority to the driver state over the vehicle state or the vehicle peripheral state. The display determination unit is configured to display vehicle information in a vehicle speed priority state in which a speedometer is highlighted, a fuel remaining priority state in which a fuel meter is highlighted, and an engine rotation that highlights and displays a tachometer. 5. The display system according to claim 4 , wherein the display display system is selected from among several priority states.

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