JP4935387B2 - Information display device - Google Patents

Description

  The present invention relates to an information display device.

As a conventional information display device, an object existing around the vehicle is detected and a warning is displayed to the driver, and the recognition state for the warning display is estimated based on the driver's line-of-sight direction so that the driver can display the warning. If the line of sight is not directed, the warning will continue to be issued. A device that suppresses alerting by reducing the brightness of the display screen, changing the display position, or stopping the display is known (for example, Patent Document 1).
JP 2005-135037 A

  Here, when the driver's posture fluctuates, or the vehicle type or driver changes, for example, the position of the pupil with respect to the warning display or the age of the driver also changes. A person's cognitive ability is affected. However, in spite of these influences, the information display device estimates the driver's cognitive state only by determining whether or not the driver has turned his / her line of sight to the warning display. Therefore, even when the driver's cognitive ability is insufficient, when the line of sight is directed to the warning display, the alerting is suppressed even if the driver is not sufficiently recognized. On the other hand, even if the driver's cognitive ability is actually sufficient, if the line of sight is deviating, it is presumed that he is looking away, and the driver is uncomfortable due to excessive alerting. It was. As described above, there has been a problem that appropriate alerting cannot be performed by changing the driver's posture, vehicle type, or driver.

  The present invention has been made in order to solve such a problem, and provides an information display device capable of causing a driver to appropriately recognize information even if the driver's cognitive ability is different. For the purpose.

  The information display device according to the present invention includes a display unit that can display light stimulus information that stimulates the driver's vision superimposed on the display information, and a cognitive power estimation unit that estimates the driver's cognitive power with respect to the light stimulus information. And a light stimulus amount adjusting means for adjusting the light stimulus amount of the light stimulus information displayed by the display means according to the cognitive ability estimated by the cognitive ability estimating means.

  In this information display device, the display means generates light stimulus information to alert the driver to the display information, and the cognitive power estimation means estimates the driver's cognitive power with respect to the light stimulus information. Here, as described above, although the driver's cognitive ability is affected by changes in the driver's posture, vehicle type, or driver, the light stimulus amount of the light stimulus information is driven by the light stimulus adjustment means. Because it is adjusted according to the driver's cognitive ability, when the driver's cognitive ability is sufficiently high, it does not give a sense of incongruity due to excessive alerting, and when the driver's cognitive ability is insufficient Can be done sufficiently. As described above, even if the driver's cognitive ability is different, the driver can be made to properly recognize the information.

  In the information display device of the present invention, it is preferable that the light stimulus amount adjusting means adjusts the light stimulus amount by changing the luminance of the light stimulus information. According to this, since the brightness | luminance of light stimulus information changes according to a driver | operator's cognitive power, information can be appropriately recognized according to a driver | operator's cognitive power.

  In the information display device of the present invention, it is preferable that the light stimulus amount adjusting means adjusts the light stimulus amount by changing a display area of the light stimulus information on the display means. According to this, since the display area of the light stimulus information is changed according to the driver's cognitive ability, the information can be appropriately recognized according to the driver's cognitive ability.

  In the information display device of the present invention, it is preferable that the cognitive power estimation means estimates the cognitive power based on the distance between the display means and the driver's pupil.

  The distance between the alerting means and the driver's pupil is subject to fluctuations depending on the driver's posture, vehicle type or driver's body size, etc., and has a great influence on the driver's cognitive ability with respect to light stimulus information. Is an element. In this information display device, since the cognitive power is estimated based on the distance between the alerting means and the pupil, the cognitive power of the driver can be accurately estimated.

  In the information display device of the present invention, the display area of the light stimulus information has a predetermined width, and the cognitive power estimation means estimates the cognitive power based on the driver's viewing angle with respect to the display area of the light stimulus information. It is preferable to do.

  The driver's viewing angle with respect to the display area of the light stimulus information is subject to fluctuations depending on the driver's posture, vehicle type, or the size of the driver's body, and has a great influence on the driver's cognitive ability with respect to the light stimulus information. Is an element. In this information display device, since the cognitive power is estimated based on the driver's viewing angle with respect to the display area, the driver's cognitive power can be accurately estimated.

  In the information display device of the present invention, it is preferable that the cognitive power estimation means estimates the cognitive power based on the age of the driver.

  In general, the higher the age, the narrower the human field of view, and the older driver's field of view is narrower and the cognitive ability to light stimulus information is lower than that of lower drivers. Is a factor that greatly affects the driver's cognitive ability with respect to light stimulus information. In this information display device, since the cognitive power is estimated based on the age of the driver, the cognitive power of the driver can be estimated more accurately.

  According to the present invention, the driver's cognitive ability with respect to the light stimulus information is estimated, and the light stimulus amount is adjusted according to the estimated cognitive power. Information.

  Embodiments of an information display device according to the present invention will be described below with reference to the drawings. In the present embodiment, the expressions “up / down”, “left / right”, and “front / rear” indicate “up / down”, “left / right”, and “front / rear” as viewed from the driver during driving.

  First, the configuration of the information display device 1 will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of an information display device 1 according to the present embodiment.

  As shown in FIG. 1, the information display device 1 is mounted on a vehicle, displays an image around the vehicle on a monitor 3 provided in the vehicle during night driving, and detects a pedestrian or the like when the monitor 3 is detected. It is a device that enhances the safety of driving at night by highlighting the pedestrians projected on the road and informing the driver. The information display device 1 includes an external shooting camera 2, a monitor 3, a pupil detection camera 4, a distance measurement sensor 6, a driver selection device 7, and an electronic control device (hereinafter referred to as “ECU”) 8.

  In the present embodiment, the monitor 3 corresponds to the display means described in the claims, and the ECU 8 corresponds to the light stimulus adjustment means and the cognitive power estimation means described in the claims.

  The outside-field photographing camera 2 is disposed on the front side of the vehicle (for example, the back side of the rearview mirror) and is attached toward the front of the vehicle. For example, an infrared camera that captures infrared rays and generates an infrared image by using light and shade according to the strength of the infrared rays is used as the external shooting camera 2. This infrared video is composed of infrared images of frames at regular intervals. The camera 2 for shooting an outside world is connected to the ECU 8 and transmits image information of each frame to the ECU 8 as an image signal at regular time intervals. Note that an infrared projector that is not illustrated may be provided as necessary. However, since the infrared light is included in the light emitted from the headlight, the infrared projector may be omitted.

  The monitor 3 is disposed in front of the driver's seat and attached to the driver. This monitor 3 is a display means for providing the driver with video around the vehicle and pedestrian information. For example, a liquid crystal display, a head-up display, or the like is used. The monitor 3 is connected to the ECU 8, receives image information from the ECU 8, and displays the image information. FIG. 2 shows an example of image information displayed on the monitor 3 (liquid crystal display). A pedestrian 11 detected from the image information of the camera 2 for shooting outside the environment is surrounded by a rectangular frame 12 and highlighted. In addition, image information is surrounded by a warning frame (light stimulus information) 13 that stimulates the driver's vision with light, and pays attention to the pedestrian 11 by giving the driver light stimulus information. As such, attention is being paid. The width W of the alerting frame 13 is such that the upper edge 13a has a width Wt, the right edge 13b has a width Wr, the lower edge 13c has a width Wb, and the left edge 13d has a width Wl. The size is adjusted in accordance with the driver's cognitive ability with respect to 13.

  Returning to FIG. 1, the pupil detection camera 4 is disposed on the steering column and attached to the driver's face. The pupil detection camera 4 transmits the imaged image data of the driver's face to an image processing unit (not shown). This image processing unit may be provided integrally with the pupil detection camera 4 or may be configured in the ECU 8. The image processing unit identifies both eyes of the driver from the face image data, and calculates the position of the center of gravity of the pupil. The image processing unit is connected to the ECU 8 and outputs the pupil position information to the ECU 8 after calculating the pupil center of gravity position.

  The distance measurement sensor 6 is disposed on the steering column and attached toward the driver's pupil, like the pupil detection camera 4. This distance measuring sensor 6 measures the distance from the pupil detection camera 4 to the driver's face, and specifically, an ultrasonic wave or a millimeter wave radar is used. The distance measurement sensor 6 is connected to the ECU 8 and transmits the measured distance information to the ECU 8. In the present embodiment, an apparatus in which the distance measurement sensor 6 and the pupil detection camera 4 are integrated, such as a camera with a distance measurement function, is used. In addition, you may use a different thing for the distance measurement sensor 6 and the camera 4 for pupil detection.

  The driver selection device 7 acquires information on the age group of the driver. For example, the driver selection device 7 acquires information by inputting by the driver himself, or the biological information such as the number of wrinkles and smell of the driver. A device that acquires information by automatic recognition is used. The driver selection device 7 is connected to the ECU 8 and transmits the acquired age information regarding the age group of the driver to the ECU 8.

  The ECU 8 includes a microprocessor that performs calculations, a ROM that stores a program for causing the microprocessor to execute each process, a RAM that stores various data such as calculation results, and a backup RAM in which the stored contents are held by a 12V battery. It is comprised by. And by the said structure, ECU8 detects the pedestrian from the acquired image information, and creates the image information by which the pedestrian 11 was highlighted in order to display on the monitor 3, and the acquired pupil gravity center position information, Based on the distance information and the age information, the driver's cognitive ability with respect to the alerting frame 13 is estimated, and the amount of light stimulation is adjusted by changing the width W of the alerting frame 13 according to the estimated cognitive ability.

  Next, the operation of the information display device 1 according to the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing a processing procedure of information display processing according to the first control mode by the information display device 1. This process is repeatedly executed at a predetermined timing in the ECU 8 from when the power source of the ECU 8 is turned on until it is turned off. Note that the processing procedure in the present embodiment is a processing procedure in the case where a pedestrian is detected from the image information obtained by the camera 2 for shooting outside the field, the pedestrian is highlighted on the monitor 3, and the alerting frame 13 is displayed. .

  First, when processing of the information display device 1 is started, pupil center-of-gravity position information is acquired from the pupil detection camera 4 (S1), and distance information between the pupil detection camera 4 and the driver's face is obtained from the distance measurement sensor 6. Is acquired (S2). Then, the width W of the alerting frame 13 is calculated so that the recognition amount is constant based on the pupil center-of-gravity position information and the distance information (S3).

  Here, a specific processing procedure for calculating the width W of the alerting frame 13 will be described.

  Here, the width Wt of the upper edge portion 13a will be considered with reference to FIG. FIG. 4 is a diagram showing a positional relationship among the monitor 3, the pupil detection camera 4, and the driver 14 when the inside of the vehicle is viewed from the left side of the vehicle. As shown in FIG. 4, a straight line 21 connecting the upper end of the upper edge 13a of the alerting frame 13 and the eye displayed on the monitor 3 and a straight line 22 connecting the lower end of the upper edge 13a and the eye are formed. When the viewing angle α is approximately 0.3 °, the width is most preferable for alerting, and alerting can be sufficiently performed without causing the driver 14 to feel uncomfortable. Note that both the straight line 21 and the straight line 22 pass through the center position of the monitor 3 in the width direction.

  From the above, the cognitive power of the driver 14 is calculated by calculating the distance between the monitor 3 and the pupil centroid position and the angle of the pupil centroid position with respect to the monitor 3 based on the positional relationship information between the monitor 3 and the pupil detection camera 4. And the width Wt of the upper edge portion 13a of the alerting frame 13 such that the viewing angle α is 0.3 ° is calculated so that the recognition amount of the driver 14 with respect to the alerting frame 13 is constant.

  In the stage before the start of processing, the ECU 8 has the initial position information indicating the positional relationship between the monitor 3 and the pupil detection camera 4 (including the distance measurement sensor 6), the pixel pitch p of the monitor 3 and the optimum viewing angle α. The value (0.3 °) is stored.

  The positional relationship between the monitor 3 and the pupil detection camera 4 will be described with reference to FIGS. FIG. 5 is a diagram illustrating the positional relationship between the monitor 3, the pupil detection camera 4, and the driver 14 when the inside of the vehicle is viewed from above the vehicle. 4 and 5, the direction from the front to the rear of the vehicle is the X-axis direction, the direction from the left to the right of the vehicle is the Y-axis direction, and the direction from the lower to the upper direction is the Z-axis direction. The position of the display screen of the monitor 3 is the X-axis reference position (X = 0), the center position of the lens of the pupil detection camera 4 is the Y-axis reference position (Y = 0), and the floor surface inside the vehicle is The position is the Z-axis reference position (Z = 0).

  In such a coordinate system, in FIGS. 4 and 5, the distance in the Z-axis direction from the Z-axis reference position to the upper end 3a of the monitor 3 is Mz0, the width of the monitor 3 in the Z-axis direction is Mh, and the Y of the monitor 3 is Y. The width in the axial direction is indicated as Mw, and the distance in the Y-axis direction from the Y-axis reference position to the right end 3b of the monitor 3 is indicated as My. The distance in the X-axis direction from the X-axis reference position to the center position of the lens of the pupil detection camera 4 is Cx0, and the distance in the Y direction from the Y-axis reference position to the lens center position of the pupil detection camera 4 is Cy ( The distance in the Z-axis direction from the Z-axis reference position to the center position of the lens of the pupil detection camera 4 is indicated as Cz0. The values of these distances Mz0, Mh, Mw, My, Cx0, Cy0, and Cz0 are stored in the ECU 8.

  Next, the distance between the center of gravity of the pupil and the monitor 3 is calculated from the distance information of the pupil detection camera 4 and the distance measurement sensor 6. 4, the distance between the pupil detection camera 4 and the face of the driver 14 is a distance F. FIG. 6 shows image data 16 acquired by the pupil detection camera 4, and FIG. 6A shows a case where the distance of the driver 14 is close to the pupil detection camera 4, ie, distance F = Fa. , (B) shows a case where the distance is F = Fb, which is a state at a distant position. As shown in FIGS. 6A and 6B, when the distance measurement sensor 6 detects the distance F as Fa or Fb, the upper end portion 16a of the acquired image data 16 and the pupil center of gravity position 14a of the driver 14 are detected. The distance ly in the Y-axis direction is measured as ly = lya and lyb when the face is captured normally and when the face is captured largely.

  Based on the measurement results of the distance F and the distance ly, the distance Fz in the Z-axis direction between the pupil center of gravity position 14a and the pupil detection camera 4 shown in FIG. 4 determines the relationship between the distances F, ly, and Fz. Obtained by a dimension map (Z-axis direction pupil position map). The Z-axis direction pupil position map is stored in the ECU 8, and when the ECU 8 acquires the distance F and the distance ly, the distance Fz based on the distance F and the distance ly is obtained by referring to the Z-axis direction pupil position map. To be acquired.

  An example of the Z-axis direction pupil position map is shown in FIG. The function curve a in FIG. 7 is a function curve showing the relationship between the distance ly and the distance Fz at the distance F = Fa, and the function curve b is a function curve showing the relationship between the distance ly and the distance Fz at the distance F = Fb. . In the case of the distance F = Fb, even if the pupil centroid position 14a moves upward by the same distance on the image data 16, the distance F = Fb is in a state farther than the distance F = Fa. The amount of movement of the pupil center-of-gravity position 14a is larger than that when the distance F = Fa. Therefore, the function curve b is steeper than the function curve a. As described above, when the distance F is acquired from the distance measurement sensor 6 and the distance ly is acquired from the image data 16 of the pupil position detection camera 4, the distance ly is applied to the function curve set for the distance F. Fz is derived.

  The distance Ez in the Z-axis direction between the Z-axis reference position and the pupil center-of-gravity position 14a is obtained by adding the distance Cz that is an initial setting value shown in FIG. 4 to the distance Fz thus obtained. Further, since the distance Fx in the X-axis direction between the pupil center of gravity position 14a and the pupil detection camera 4 is obtained from the distance F and the distance Fz, the distance Cx, which is an initial setting value, is added to the distance Fx, thereby obtaining the X-axis reference. A distance Ex between the position and the pupil center-of-gravity position 14a in the X-axis direction is obtained.

  The Y-axis direction distance Fy between the pupil center-of-gravity position 14a and the pupil detection camera 4 is also based on the pupil center-of-gravity position 14a and the distance F in the image data 16 by using the Y-axis direction pupil position map stored in the ECU 8. It can be obtained similarly. Then, the distance Ey in the Y-axis direction between the Y-axis reference position and the center of gravity of the pupil is obtained by adding the distance Cy that is an initial setting value to the obtained distance Fy. Since the distance Cy = 0, the distance Fy becomes the distance Ey as it is.

  FIG. 8 is a diagram showing a positional relationship between the monitor 3 and the pupil barycenter position 14a when the inside of the vehicle is viewed from above the vehicle. Next, based on the obtained distance Fx and distance Fy, a distance Lx on the XY plane between the pupil barycenter position 14a and the width direction center position 3c of the monitor 3 shown in FIG. 8 is derived. Since the width in the Y-axis direction of the monitor 3 is Mw and the distance in the Y-axis direction from the Y-axis reference position to the position of the right end 3b of the monitor 3 is My, the width-direction central position 3c of the monitor 3 in the Y-axis direction is The position is indicated as Y = − {(Mw / 2) + My}. Therefore, the distance Lx is obtained by the following formula (1).

  FIG. 9 is a diagram showing the positional relationship between the monitor 3 and the pupil center of gravity position 14a when the inside of the vehicle is viewed from the left side of the vehicle. When the distance Lx is obtained, it is displayed on the monitor 3 from the positional relationship shown in FIG. The width Wt of the upper edge 13a of the alerting frame 13 is obtained. As shown in FIG. 9, the distance in the Z-axis direction between the Z-axis reference position and the upper end 3a of the monitor 3 is Mz0, and the distance in the Z-axis direction between the Z-axis reference position and the pupil center of gravity position 14a is Ez. Therefore, the distance in the Z-axis direction between the upper end 3a of the monitor 3 and the pupil barycentric position 14a is represented by Ez-Mz0. At this time, a straight line 23 (which coincides with the straight line 21 described above) connecting the upper end 3a of the monitor 3 and the pupil centroid position 14a at the center position 3c in the width direction is a plane parallel to the XY plane passing through the pupil centroid position 14a. Assuming that the angle formed with respect to θ is θ, the relationship between θ, the viewing angle α, the distances Ez, Mz0, and the width Wt of the upper edge portion 13a of the alerting frame 13 is expressed as Equation (2).

  By combining this equation (2), the width Wt for setting the viewing angle α to the optimum value of 0.3 ° is obtained by the equation (3).

  Note that the viewing angle with respect to the pupil center-of-gravity position 14a is the optimum value for the width Wr of the right edge 13b, the width Wb of the lower edge 13c, and the width Wl of the left edge 13d in the same manner as the width Wt of the upper edge 13a. The width W is obtained so that

  Returning to FIG. 3, when the width W of the alerting frame 13 is obtained, the number P of pixels with respect to the width W is determined by dividing the width W by the pixel pitch p stored in the ECU 8 (S4).

  Thereafter, age information regarding the age group of the driver 14 is acquired from the driver selection device 7 (S5). Thereafter, a corresponding weight w value is acquired from a two-dimensional map (photostimulation amount map) that defines a weight w value that is a coefficient for amplifying the width W of the alerting frame 13 according to the acquired age information (S6). ). The photostimulation amount map is stored in the ECU 8. When the ECU acquires age information, the weight w value corresponding to the age is calculated by referring to the photostimulation amount map. Then, by multiplying the number of pixels P with respect to the width W of the alerting frame 13 by the weight w value, the width W is amplified and converted to the number of pixels P ′ for display.

  An example of the light stimulus amount map is shown in FIG. FIG. 10 is a diagram showing a light stimulus amount map showing the relationship between the driver's age group and the weight w value. FIG. 10A is a light stimulus amount map in which the weight w value is divided into two stages, and FIG. It is a light stimulus amount map in which the weight w value is divided into N stages. Since the elderly driver 14 has a narrower field of view than the younger driver 14, the recognition amount cannot be kept constant without increasing the amount of light stimulation by the alerting frame 13. Accordingly, in FIG. 10A, when the driver 14 is 65 years old or younger, the weight w value is 1.0, and the width W of the alerting frame 13 is a width corresponding to the preset viewing angle α. When over 65 years old, the amount of light stimulation is increased by increasing the weight w value to make the width W larger than the width corresponding to the preset viewing angle α. In FIG. 10B, the light stimulus amount is gradually increased by gradually increasing the weight w value as the age increases.

  When the number of pixels P ′ of the alerting frame 13 to be displayed on the monitor 3 is determined, the pedestrian 11 is added to the scenery around the vehicle and the pedestrian image information drawn based on the image information obtained from the camera 2 for shooting the outside world. Image information in which the surrounding rectangular frame 12 and the alerting frame 13 are superimposed is created (S7). Then, the created image information is output to the monitor 3 (S8). When the processing so far is completed, the process returns to S1 again, and the same processing procedure is repeated.

  In the embodiment as described above, the width W of the alerting frame 13 is changed even though the cognitive power of the driver 14 is affected by the posture, the vehicle type, or the driver 14 of the driver 14. Thus, the recognition amount of the driver 14 is kept constant by maintaining the viewing angle α that is the most suitable alert for the driver 14. Therefore, when the driver 14 is sufficiently aware, it is possible not to give a sense of incongruity due to excessive attention, and when the driver 14 is insufficient in cognitive ability, sufficient alerting can be performed. As described above, even if the driver 14 has different cognitive power, the driver 14 can be appropriately alerted.

  Further, even if the driver's 14 cognitive ability is different, the driver's recognition amount can be changed by changing the size of the width W of the alerting frame 13, that is, the display area, thereby reliably driving. The amount of recognition of the person can be kept constant.

  Further, the distance of the pupil center of gravity position 14a to the monitor 3 and the angle formed by the straight line 21 and the straight line 22 are subject to fluctuations depending on the posture of the driver 14, the type of vehicle, the size of the body of the driver 14, and the like. This is an element that greatly affects the cognitive power of the driver 14 with respect to the frame 13. In this information display device 1, since the cognitive power is estimated based on such elements, the cognitive power of the driver 14 can be accurately estimated, and the attitude of the driver 14, the vehicle type, or the driver 14 The amount of recognition of the driver 14 can be reliably kept constant without depending on the size of the body.

  In addition, since the field of view of the older driver 14 is narrower than that of the lower driver 14 and the cognitive power with respect to the alerting frame 13 is reduced, the age of the driver 14 is an element that greatly affects the cognitive power. . In this information display device 1, since the cognitive power is estimated based on such elements, the cognitive power of the driver 14 can be accurately estimated, and driving without fail depending on the age of the driver 14. The amount of recognition of the person 14 can be kept constant.

  Next, information display processing according to the second control mode by the information display device 1 will be described with reference to the flowchart shown in FIG. FIG. 11 is a flowchart illustrating a processing procedure of information display processing according to the second control mode performed by the information display device 1. This second control form is a modification of the first control form described above, and as shown in FIG. 11, is different from the first control form in that step S9 is executed instead of step S6 described above. . The other processing steps are the same as those in the first control mode, and therefore description thereof is omitted here.

  In a 2nd control form, it respond | corresponds from the two-dimensional map (photostimulation amount map) which defined the weight w value which is a coefficient for increasing the brightness | luminance of the alerting frame 13 according to the acquired age information in step S9. Get the weight w value.

  According to this control mode, even if the cognitive power of the driver 14 is different, the amount of recognition of the driver 14 can be changed by the brightness of the alerting frame 13, thereby reliably recognizing the driver 14. The amount can be kept constant.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the above embodiment, the present invention is applied to night vision. However, the present invention is not limited to this, and the present invention can also be applied to an apparatus that provides predetermined information to a driver, such as a car navigation system.

  Moreover, it is good also as keeping recognition amount constant by changing only the brightness | luminance of an alerting frame.

  Furthermore, although the light stimulus information is given by displaying the alerting frame on the monitor, the light stimulus information may be generated from a device other than the monitor.

It is a figure which shows the structure of the information display apparatus 1 which concerns on this Embodiment. It is a figure which shows an example of the image information displayed on the monitor. 4 is a flowchart showing a processing procedure of information display processing according to a first control mode by the information display device 1. It is the figure which showed the positional relationship of a monitor, a camera for pupil detection, and a driver when the inside of the vehicle is viewed from the left side of the vehicle. It is the figure which showed the positional relationship of a monitor, a camera for pupil detection, and a driver when the inside of the vehicle is viewed from above the vehicle. The image data acquired by the pupil detection camera is shown, (a) shows the case where the driver's face is close to the pupil detection camera, and distance F = Fa, and (b) shows the far position. In this case, the distance F = Fb is shown. It is a figure which shows an example of a Z-axis direction pupil position map. It is the figure which showed the positional relationship of a monitor and a pupil gravity center position when the inside of a vehicle is seen from the vehicle upper direction. It is the figure which showed the positional relationship of a monitor and a pupil gravity center position when the inside of a vehicle is seen from the vehicle left side. It is a figure which shows the light stimulus map which showed the driver | operator's age group and the weight w value, (a) is a light stimulus amount map which divided weight w value into two steps, (b) is weight w value. It is a light stimulus amount map divided into N stages. It is a flowchart which shows the process sequence which concerns on the 2nd control form by the information display apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Information display apparatus, 3 ... Monitor (display means), 8 ... ECU (light stimulus adjustment means, cognitive ability estimation means), 13 ... Warning frame (light stimulus information), 14 ... Driver.

Claims (4)

Display means capable of superimposing display information on light stimulus information that stimulates the driver's vision;
Cognitive ability estimating means for estimating the driver's cognitive ability with respect to the light stimulus information;
A light stimulus amount adjusting means for adjusting a light stimulus amount of the light stimulus information displayed by the display means according to the cognitive power estimated by the cognitive power estimating means ,
The light stimulus information is a caution frame that surrounds the display information and stimulates the driver's vision with light,
The cognitive power estimation means estimates the cognitive power based on at least a distance between the display means and the driver's pupil, and an angle of the driver's pupil with respect to the display means,
The information display device, wherein the light stimulation amount adjusting means adjusts the light stimulation amount by changing a width of an edge of the alerting frame .   The information display device according to claim 1, wherein the light stimulus amount adjusting unit adjusts the light stimulus amount by changing a luminance of the light stimulus information. The display area of the photostimulation information has a predetermined width, and the cognitive power estimation means estimates the cognitive power based on a visual angle of the driver with respect to the display area of the photostimulation information. The information display device according to claim 1, wherein the information display device is a display device. The information display apparatus according to claim 1 , wherein the cognitive power estimation unit estimates the cognitive power based on the age of the driver.

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