JP2016090848A - Display control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display control device capable of determining whether or not the sun exists at a position where the reflected light of sunlight is made incident on the eyes of the passenger of a mobile body, and more appropriately controlling the luminance of a display device in accordance with whether or not sunlight is actually made incident on the mobile body with an inexpensive configuration.SOLUTION: A display control device 100 includes: a comparison part 45 for comparing the measured value of an illuminance sensor 5 with a threshold; a determination part 44 for determining whether or not the reflected light of sunlight is made incident on the eyes of the driver of a vehicle by using vehicle state information indicating a current time and the travel direction of the vehicle and sun position information indicating the azimuth and height of the sun; and a luminance control part 46 for, when it is determined that the measured value is more than a threshold, and that the reflected light is made incident on the eyes of the driver, setting the luminance value of a display surface higher than that when it is determined that the measured value is not more than the threshold, and that the reflected light is not made incident on the eyes of the driver.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display control device that controls a display device such as a liquid crystal display provided in a moving body.

  2. Description of the Related Art Conventionally, in a display device mounted on a moving body such as a vehicle, a technique for controlling the luminance of the display surface in consideration of the influence of reflected light reflected on the display surface of the display device by sunlight incident on the moving body Have been developed (see, for example, Patent Document 1 and Patent Document 2).

  The monitoring device of Patent Literature 1 uses the image obtained by capturing the driver's face by the indoor monitoring camera and the image obtained by capturing the front of the vehicle by the front monitoring camera for the driver using sunlight and reflected light of sunlight. A dazzling state is detected. When the monitoring device of Patent Literature 1 detects a dazzling state for the driver, the monitoring device increases the brightness of the screen of the display device or changes the position of the image displayed on the screen.

  The in-vehicle image display device of Patent Document 2 calculates the solar radiation direction relative to the traveling direction of the vehicle using latitude / longitude data received from a GPS (Global Positioning System) satellite and world standard time data. The on-vehicle image display device of Patent Document 2 changes the light emission luminance and the posture of the display surface of the display panel according to the calculated solar radiation direction.

JP 2007-276766 A JP 2008-162332 A

  Since the monitoring device of Patent Literature 1 uses two cameras, an indoor monitoring camera and a front monitoring camera, there is a problem that the entire device becomes expensive. Also, based on the brightness of the area around the driver's eyes in the image of the driver's face imaged by the indoor surveillance camera, it is determined whether the driver's eyes are irradiated with strong light. Even if the reflected light of the display surface of the display device is not strong enough to be recognized in the above image, the phenomenon that the screen becomes difficult to see occurs, so the invention of this document solves the phenomenon that the display surface becomes difficult to see Can not.

  The on-vehicle image display device of Patent Literature 2 controls the display panel according to the solar radiation direction calculated using latitude and longitude data and world standard time data. Therefore, the in-vehicle image display device disclosed in Patent Document 2 is a moving object even when the weather is cloudy or raining and when traveling in a tunnel, even though sunlight is not actually incident on the moving object. It is determined that sunlight is incident on the display surface, and the light emission luminance of the display surface is increased. As a result, there is a problem that the display surface becomes difficult to see or the battery is wasted due to unnecessary increase in luminance.

  The present invention has been made to solve the above-described problems, and in addition to determining whether or not the sun is in a position where reflected light of sunlight is incident on the eyes of a passenger of a moving object. An object of the present invention is to provide a display control device that can more appropriately control the luminance of the display device depending on whether or not sunlight is actually incident on the moving body and can be configured at low cost. And

  The display control device of the present invention is a display control device that controls a display device provided on a moving body, and obtains a measurement value of an illuminance sensor that measures the illuminance at the periphery of the display surface of the display device, and the measurement value Is reflected on the display surface using a comparison unit that compares the current position with the threshold, vehicle state information indicating the current position of the moving body, the current time and the traveling direction of the moving body, and solar position information indicating the azimuth and height of the sun. A determination unit that determines whether or not reflected reflected light of sunlight enters the eyes of the passenger of the mobile object, and determines that the measured value exceeds a threshold value and the reflected light is incident on the eyes of the passenger And a luminance control unit that increases the luminance value of the display surface as compared with the case where the measured value is equal to or less than the threshold value and the case where it is determined that the reflected light does not enter the passenger's eyes.

  The display control device of the present invention is a display control device that controls a display device provided on a moving body, and obtains an illuminance acquisition value that acquires a measurement value of an illuminance sensor that measures the illuminance of the peripheral portion of the display surface of the display device Part, vehicle position information indicating the current position of the moving object, current time and traveling direction of the moving object, and solar position information indicating the azimuth and height of the sun. A determination unit that determines whether or not light enters the eyes of the passenger of the moving body, and the luminance value of the display surface is increased as the measured value increases, and it is determined that the reflected light is incident on the eyes of the passenger. A brightness control unit that increases the rate of change of the brightness value with respect to the measured value, compared to a case where it is determined that the reflected light does not enter the eyes of the passenger.

  The display control device of the present invention uses the vehicle state information and the sun position information to determine whether or not the sun is in a position where the reflected light is incident on the eyes of the passenger, and in addition to the measurement value of the illuminance sensor. Accordingly, since the luminance value or the rate of change thereof is controlled, the luminance of the display device can be controlled more appropriately depending on whether sunlight is actually incident on the moving body. Further, the display control device of the present invention can be configured at a low cost by reducing the number of cameras.

It is a block diagram which shows the principal part of the display control apparatus of Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the display control apparatus of Embodiment 1 of this invention. It is a block diagram which shows the principal part of the other display control apparatus of Embodiment 1 of this invention. It is a block diagram which shows the principal part of the display control apparatus of Embodiment 2 of this invention. It is a characteristic view which shows an example of the brightness | luminance which the display control apparatus of Embodiment 2 of this invention controls. It is a flowchart which shows operation | movement of the display control apparatus of Embodiment 2 of this invention. It is a characteristic view which shows the other example of the brightness | luminance which the display control apparatus of Embodiment 2 of this invention controls. It is a block diagram which shows the principal part of the display control apparatus of Embodiment 3 of this invention. It is a block diagram which shows the principal part of the other display control apparatus of Embodiment 3 of this invention. It is a block diagram which shows the principal part of the other display control apparatus of Embodiment 3 of this invention.

Embodiment 1 FIG.
A display control apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. The block diagram of FIG. 1 shows an example in which the display device 1, the GPS receiver 2, the vehicle speed sensor 3, the navigation device 4, and the illuminance sensor 5 are provided in a vehicle not shown. In the following description, it is assumed that the user of the display device 1 and the navigation device 4 is a vehicle driver.

  The display device 1 is configured by a liquid crystal display, for example. The display device 1 includes a liquid crystal module 11 with a built-in backlight and a backlight drive unit 12 that drives the backlight.

  The GPS receiver 2 receives a signal from a GPS satellite (not shown). The vehicle speed sensor 3 outputs a vehicle speed pulse representing the traveling speed of the vehicle. The gyro sensor 41 detects the angular velocity of the rotational motion of the vehicle and outputs it as angular velocity information.

  The positioning calculation unit 42 calculates the current position of the vehicle using the signal received by the GPS receiver 2, the vehicle speed pulse output from the vehicle speed sensor 3, and the angular velocity information output from the gyro sensor 41. The positioning calculation unit 42 calculates the current time using the signal received by the GPS receiver 2. The positioning calculation unit 42 uses the angular velocity information output from the gyro sensor 41 to calculate the vehicle inclination angle with respect to the vehicle traveling direction and the gravity direction. The positioning calculation unit 42 outputs navigation information indicating the calculated current position, current time, traveling direction, and tilt angle to the determination unit 44.

  In the navigation information, at least the current position, the current time, and the traveling direction constitute vehicle state information. Among the navigation information, the vehicle tilt angle with respect to the direction of gravity is not essential information. By using this tilt angle, it is possible to determine whether or not the sun is at the position where the reflected sunlight enters the driver's eyes. More accurate determination can be made.

  The storage unit 43 stores map information. The memory | storage part 43 memorize | stores the information (henceforth "sun position information") which shows the azimuth | direction and height of the sun with respect to each point on a map in each date in one year. The memory | storage part 43 memorize | stores the installation angle information which shows the installation angle of the display surface of the liquid crystal module 11 with respect to a vehicle. The storage unit 43 stores eye position information indicating the position of the eyes of the driver of the vehicle with respect to the display surface of the liquid crystal module 11.

  The determination unit 44 calculates the incident direction of sunlight with respect to the vehicle using the navigation information output from the positioning calculation unit 42 and the solar position information stored in the storage unit 43. The determination unit 44 uses the calculated incident direction of sunlight and the installation angle information and eye position information stored in the storage unit 43 to reflect the sunlight incident on the vehicle on the display surface of the liquid crystal module 11. It is determined whether or not the reflected light is incident on the eyes of the driver of the vehicle.

  The illuminance sensor 5 is configured by, for example, a photodiode provided in the display device 1. The illuminance sensor 5 measures the illuminance of light incident on the display surface of the liquid crystal module 11 and outputs the measurement value to the comparison unit 45.

  The comparison unit 45 compares the measurement value output from the illuminance sensor 5 with a predetermined threshold value. This threshold value is set to a value that can determine whether or not sunlight is incident on the display surface of the liquid crystal module 11 by comparing with the measurement value of the illuminance sensor 5.

  The luminance control unit 46 controls the luminance of the liquid crystal module 11 by controlling the backlight driving unit 12. The brightness control unit 46 determines that the reflected light is not incident on the driver's eyes by the determination unit 44 and the brightness value of the liquid crystal module 11 is a predetermined value ( Hereinafter, it is set to “first luminance value”). This first luminance value is, for example, a value set in advance at the time of shipment of the navigation device 4 or a value set by the user.

  The luminance control unit 46 also determines the luminance of the liquid crystal module 11 when the determination unit 44 determines that the reflected light does not enter the driver's eyes and the measured value of the illuminance sensor 5 exceeds the threshold value. One luminance value is set. The luminance control unit 46 also sets the luminance of the liquid crystal module 11 to the first luminance value even when the determination unit 44 determines that the reflected light is incident on the driver's eyes and the measured value of the illuminance sensor 5 is equal to or less than the threshold value. It is supposed to be set.

  On the other hand, the luminance control unit 46 determines the luminance of the liquid crystal module 11 as the first when the determination unit 44 determines that the reflected light is incident on the driver's eyes and the output value of the illuminance sensor 5 exceeds the threshold value. A value higher than the luminance value (hereinafter referred to as “second luminance value”) is set.

  The positioning calculation unit 42, the determination unit 44, the comparison unit 45, and the luminance control unit 46 are configured by, for example, a CPU (Central Processing Unit) or a dedicated integrated circuit. The storage unit 43 is configured by, for example, an HDD (Hard Disk Drive) or a semiconductor memory. The gyro sensor 41, the positioning calculation unit 42, the storage unit 43, the determination unit 44, the comparison unit 45, and the luminance control unit 46 constitute the navigation device 4.

  The navigation device 4 is configured by a portable information terminal such as a car navigation device mounted on a vehicle or a smartphone brought into the vehicle, for example. The liquid crystal display that constitutes the display device 1 may be separate from the car navigation device or the portable information terminal that constitutes the navigation device 4, or may be integral.

  The display control apparatus 100 according to the first embodiment is configured by the determination unit 44, the comparison unit 45, and the luminance control unit 46.

  Next, operations of the display device 1 and the navigation device 4 will be described with reference to the flowchart of FIG. Here, it is assumed that the vehicle provided with the display device 1, the GPS receiver 2, the vehicle speed sensor 3, the navigation device 4, and the illuminance sensor 5 is traveling. It is assumed that the storage unit 43 stores sun position information, installation angle information, and eye part position information in advance.

  First, in step ST1, the positioning calculation unit 42 uses the signal received by the GPS receiver 2, the vehicle speed pulse output from the vehicle speed sensor 3, and the angular velocity information output from the gyro sensor 41, to determine the current position of the vehicle. The vehicle inclination angle with respect to the current time, the traveling direction of the vehicle and the direction of gravity is calculated. The positioning calculation unit 42 outputs the calculated current position, current time, traveling direction, and inclination angle to the determination unit 44 as navigation information.

  Next, in step ST <b> 2, the determination unit 44 acquires, from the storage unit 43, solar position information, posture angle information, and eye part position information with respect to the current position and current time of the vehicle indicated by the navigation information. The determination unit 44 calculates the incident direction of sunlight on the vehicle using the navigation information and the sun position information. The determination unit 44 uses the calculated incident direction of sunlight, the installation angle information, and the eye position information to reflect the reflected light reflected on the display surface of the liquid crystal module 11 among the sunlight incident on the vehicle. It is determined whether it is incident on the driver's eyes.

  If it is determined that the reflected light is incident on the driver's eyes (step ST2 “YES”), then, in step ST3, the comparison unit 45 acquires a measured value of illuminance from the illuminance sensor 5. The comparison unit 45 compares the acquired measurement value with a threshold value.

  If it is determined that the reflected light does not enter the driver's eyes (step ST2 “NO”), and if the output value of the illuminance sensor 5 is equal to or less than the threshold value (step ST3 “NO”), then the process goes to step ST4. The luminance control unit 46 controls the backlight driving unit 12 to set the luminance of the liquid crystal module 11 to the first luminance value.

  On the other hand, when it is determined that the reflected light is incident on the driver's eyes and the output value of the illuminance sensor 5 exceeds the threshold value (step ST3 “YES”), then in step ST4a, the luminance control unit 46 The backlight driving unit 12 is controlled to set the luminance of the liquid crystal module 11 to a second luminance value higher than the first luminance value.

  The display device 1 and the navigation device 4 repeat the processes of steps ST1 to ST4 and ST4a at predetermined time intervals. The display device 1 and the navigation device 4 end the process when the power is turned off or an operation indicating stop of luminance control is input.

  Note that the order of processing in steps ST2 and ST3 is not limited to the order shown in FIG. After the comparison unit 45 executes the comparison process of step ST3, the determination unit 44 may execute the determination process of step ST2. Alternatively, the determination process of step ST2 by the determination unit 44 and the comparison process of step ST3 by the comparison unit 45 may be repeatedly performed independently while the vehicle is traveling. In the block diagram of FIG. 1, an arrow indicating a signal for adjusting the processing timing between the determination unit 44 and the comparison unit 45 is not shown.

As described above, the display control device 100 according to the first embodiment acquires the measurement value of the illuminance sensor 5 that measures the illuminance at the peripheral portion of the display surface of the display device 1 and compares the measurement value with the threshold value. 45, the navigation information indicating the current position of the vehicle, the current time and the traveling direction of the vehicle, and the solar position information indicating the azimuth and height of the sun, the reflected sunlight reflected on the display surface is A determination unit 44 that determines whether or not the light enters the driver's eyes, and when the measured value exceeds the threshold value and the reflected light is determined to be incident on the driver's eyes, the measured value is the threshold value. And a luminance control unit 46 that increases the luminance value of the display surface as compared with the case where the reflected light does not enter the eyes of the driver.
Even if it is determined that the reflected light of sunlight is incident on the driver's eyes based on the navigation information and the solar position information, the luminance value is not increased when the measured value of the illuminance sensor 5 is less than or equal to the threshold value. Unnecessary brightness increases such as when the weather is cloudy or raining and when traveling in a tunnel can be suppressed. That is, in addition to determining whether or not the sun is in a position where the reflected light of the sunlight is incident on the eyes of the occupant of the moving body, depending on whether or not the sunlight is actually incident on the moving body Thus, the luminance of the display device can be controlled more appropriately.
In addition, the entire apparatus including the display control apparatus 100 can be configured at low cost by eliminating the need for a camera that images the inside of the vehicle and the front of the vehicle.

  Note that the luminance control unit 46 may change the emission color of the liquid crystal module 11 in addition to the luminance value of the liquid crystal module 11 by controlling the backlight driving unit 12. When the determination unit 44 determines that the reflected light is incident on the driver's eyes and the output value of the illuminance sensor 5 exceeds the threshold value, the brightness control unit 46 has a clearer contrast of the image displayed on the display surface. Thus, the hue or saturation of the emission color of the liquid crystal module 11 is changed. Thereby, even when the luminance value of the liquid crystal module 11 is increased, it is possible to control the display surface of the liquid crystal module 11 so that it can be easily seen.

  Moreover, as shown in FIG. 3, it is good also as a structure which provided the module rotation part 13 which changes the installation angle of the liquid crystal module 11 with respect to a vehicle, and the attitude | position control part 47 which controls the module rotation part 13. FIG. The attitude control unit 47 controls the module rotation unit 13 to control the liquid crystal module when the determination unit 44 determines that the reflected light is incident on the driver's eyes and the measured value of the illuminance sensor 5 exceeds the threshold value. 11 is changed in any direction. The attitude control unit 47 causes the storage unit 43 to store installation angle information indicating the changed installation angle of the liquid crystal module 11. Thus, by changing the installation angle of the liquid crystal module 11, it is possible to eliminate the state in which reflected sunlight is incident on the driver's eyes.

  In the configuration of FIG. 3, when the installation angle of the liquid crystal module 11 is changed, the luminance control unit 46 returns the luminance value of the liquid crystal module 11 to the first luminance value when the measured value of the illuminance sensor 5 is equal to or less than the threshold value. It is also good. Thereby, the unnecessary brightness | luminance raise of the liquid crystal module 11 can further be suppressed.

  Moreover, the moving body provided with the display device 1, the GPS receiver 2, the vehicle speed sensor 3, the navigation device 4, and the illuminance sensor 5 is not limited to a vehicle. It is good also as what is mounted in arbitrary moving bodies including a railroad, a ship, an aircraft, etc.

  Moreover, the display which comprises the display apparatus 1 should just be a flat panel display, and is not limited to a liquid crystal display. An organic EL display or the like may be used.

  The eye position information stored in the storage unit 43 may be any information indicating the position of the eyes of any passenger who rides on the moving body and views the screen of the display device 1. It is not limited to information indicating the position. The determination unit 44 is not limited to the driver, and may determine whether or not reflected sunlight is incident on the passenger's eye indicated by the eye position information.

Embodiment 2. FIG.
FIG. 4 is a block diagram of main parts of the navigation device 4 and the display device 1 including the display control device 100a of the second embodiment. With reference to FIG. 4, the display control apparatus 100a which changes the change rate of the luminance value with respect to the measured value of the illuminance sensor 5 according to whether or not the reflected light is incident on the driver's eyes will be described. In FIG. 4, the same components as those in the block diagram of the first embodiment shown in FIG.

  The illuminance acquisition unit 45 a acquires the illuminance value measured by the illuminance sensor 5.

  The luminance control unit 46 a controls the luminance of the liquid crystal module 11 by controlling the backlight driving unit 12. The luminance control unit 46a increases the luminance value of the liquid crystal module 11 as the measurement value of the illuminance sensor 5 acquired by the illuminance acquisition unit 45a increases. When the determination unit 44 determines that the reflected light is incident on the driver's eyes, the luminance control unit 46a measures the measured value of the illuminance sensor 5 more than when the reflected light is determined not to enter the driver's eyes. The rate of change of the luminance value with respect to is increased.

  The display unit 100a according to the second embodiment is configured by the determination unit 44, the illuminance acquisition unit 45a, and the luminance control unit 46a.

  FIG. 5 is a characteristic diagram illustrating an example of the luminance of the liquid crystal module 11 controlled by the luminance control unit 46a. The horizontal axis in FIG. 5 indicates the measurement value of the illuminance sensor 5, and the vertical axis indicates the luminance value of the liquid crystal module 11. The characteristic line I represents an example of luminance when it is determined that the reflected light does not enter the driver's eyes. The characteristic line II represents an example of luminance when it is determined that the reflected light is incident on the driver's eyes.

  As shown in FIG. 5, the characteristic lines I and II are both exponential functions. The slope value of characteristic line II (hereinafter referred to as “second rate of change”) is higher than the slope value of characteristic line I (hereinafter referred to as “first rate of change”). That is, when it is determined that the reflected light is incident on the driver's eyes, the rate of change of the luminance value with respect to the measurement value of the illuminance sensor 5 is higher than when the reflected light is determined not to be incident on the driver's eyes. It has become.

  Next, operations of the display device 1 and the navigation device 4 will be described with reference to the flowchart of FIG. In FIG. 6, the same steps as those in the flowchart of the first embodiment shown in FIG.

  First, the positioning calculation part 42 performs the process of step ST1 similar to Embodiment 1. FIG. Next, the determination unit 44 executes the process of step ST2 similar to that in the first embodiment.

  If it is determined that the reflected light does not enter the driver's eyes (step ST2 “NO”), then, in step ST11, the luminance control unit 46a determines the change rate of the luminance value with respect to the measurement value of the illuminance sensor 5. Set to 1 rate of change. The luminance control unit 46a starts luminance control of the liquid crystal module 11 along the characteristic line I in FIG.

  On the other hand, if it is determined that the reflected light is incident on the driver's eyes (step ST2 “YES”), then in step ST11a, the luminance control unit 46a determines the change rate of the luminance value with respect to the measurement value of the illuminance sensor 5. Set to the second rate of change. The luminance control unit 46a starts luminance control of the liquid crystal module 11 along the characteristic line II in FIG.

  Hereinafter, the display device 1 and the navigation device 4 repeat the operations of steps ST1, ST2, ST11, ST11a at predetermined time intervals. The display device 1 and the navigation device 4 end the process when the power is turned off or an operation indicating stop of luminance control is input.

As described above, the display control device 100a according to the second embodiment includes the illuminance acquisition unit 45a that acquires the measurement value of the illuminance sensor 5 provided in the peripheral portion of the display surface of the display device 1, the current position of the vehicle, and the current time. And the navigation information indicating the traveling direction of the vehicle and the solar position information indicating the azimuth and height of the sun with respect to the vehicle, the reflected sunlight reflected on the display surface enters the eyes of the driver of the vehicle. A determination unit 44 for determining whether or not the luminance value of the display surface is increased as the measurement value increases, and when it is determined that the reflected light is incident on the eyes of the occupant, the reflected light is And a luminance control unit 36a that increases the rate of change of the luminance value with respect to the measured value, compared with the case where it is determined that the light does not enter the light source.
Thereby, even if it is determined that the reflected light of sunlight is incident on the driver's eyes, the luminance value of the liquid crystal module 11 is not reflected in the driver's eyes in the range where the measured value of the illuminance sensor 5 is low. The value is close to the case where it is determined that the light does not enter. Therefore, similarly to the display control apparatus 100 of the first embodiment, it is possible to suppress unnecessary increase in luminance such as when the weather is cloudy or raining and when traveling in the tunnel. That is, in addition to determining whether or not the sun is in a position where the reflected light of the sunlight is incident on the eyes of the occupant of the moving body, depending on whether or not the sunlight is actually incident on the moving body Thus, the luminance of the display device can be controlled more appropriately.
In addition, the entire apparatus including the display control apparatus 100a can be configured at low cost by eliminating the need for a camera that images the inside of the vehicle and the front of the vehicle.

  The change rate of the luminance value with respect to the measurement value of the illuminance sensor 5 is not limited to the change rate of the characteristic lines I and II shown in FIG. FIG. 7 shows another example of the luminance change rate set by the luminance control unit 46a. The characteristic line III represents the luminance when it is determined that the reflected light does not enter the driver's eyes. The characteristic line IV represents the luminance when it is determined that the reflected light is incident on the driver's eyes. The characteristic line III is linear, and the slope value (first change rate) of the characteristic line III is constant regardless of the output value of the illuminance sensor 5. On the other hand, the slope value (second change rate) of the characteristic line IV is equal to the first change rate when the output value of the illuminance sensor 5 is equal to or less than a predetermined threshold, and the output value of the illuminance sensor 5 exceeds the threshold. Then, it is higher than the first rate of change. Similar to the threshold value of the first embodiment, this threshold value is set to such a value that it can be determined whether or not sunlight is incident on the display surface of the liquid crystal module 11 by comparing with the measurement value of the illuminance sensor 5. ing.

  In the luminance control along the characteristic lines III and IV shown in FIG. 7, even if it is determined that the reflected light is incident on the driver's eyes, the luminance value is The value is the same as when it is determined that the reflected light does not enter the eyes of the passenger. Therefore, as in the case of the luminance control along the characteristic lines I and II shown in FIG. 5, it is possible to suppress an unnecessary increase in luminance such as when the weather is cloudy or raining or when traveling in a tunnel.

Embodiment 3 FIG.
FIG. 8 is a block diagram of the main parts of the navigation device 4 and the display device 1 including the display control device 100b of the third embodiment. With reference to FIG. 8, the display control apparatus 100b which determines whether reflected light injects into a driver | operator's eyes using the image imaged with the vehicle interior camera 6 is demonstrated. In FIG. 8, the same components as those in the block diagram of the first embodiment shown in FIG.

  The in-vehicle camera 6 includes a camera that captures an image including the face of the driver of the vehicle.

  The determination unit 44b estimates the position of the driver's eyes with respect to the liquid crystal module 11 using an image captured by the in-vehicle camera 6, and generates eye part position information. The determination unit 44b uses the generated eye position information, the navigation information output by the positioning calculation unit 42, and the sun position information and installation angle information stored in the storage unit 43 to drive reflected sunlight. It is determined whether or not it is incident on the eyes of the hand.

  The determination unit 44b, the comparison unit 45, and the luminance control unit 46 constitute the display control device 100b of the third embodiment.

  The display control device 100b generates eye position information using an image including the driver's face imaged by the in-vehicle camera 6, and reflected light is incident on the driver's eyes using the generated eye position information. By determining whether or not, the accuracy of the determination can be improved. In addition, since only one in-vehicle camera is used, a camera for imaging the front of the vehicle is not necessary, and the entire apparatus including the display control apparatus 100b can be configured at a lower cost than the monitoring apparatus of Patent Document 1.

  As described above, in the display control device 100b according to the third embodiment, the determination unit 44b estimates the position of the driver's eyes, the navigation information, and the sun estimated by the in-vehicle camera 6 using the image of the driver's face. It is determined whether or not the reflected light is incident on the driver's eyes using the position information. Thereby, it is possible to improve the determination accuracy of whether or not the reflected sunlight is incident on the driver's eyes.

  Note that the determination unit 44b may store the generated eye position information in the storage unit 43. In this case, the determination unit 44b generates eye position information using an image captured by the in-vehicle camera 6 in the first determination after the display device 1 and the navigation device 4 are turned on, and the storage unit in subsequent determinations. It is good also as what acquires eye part position information from 43. FIG.

  Further, as shown in FIG. 9, in addition to the configuration of the third embodiment, a module rotation unit 13 and a posture control unit 47 similar to those of the first embodiment may be provided.

  Further, as shown in FIG. 10, a headrest position acquisition unit 7 may be provided instead of the in-vehicle camera 6. The headrest position acquisition unit 7 detects the position of the driver's seat relative to the longitudinal direction of the vehicle, the height of the driver's seat, and the reclining angle of the driver's seat, and the position of the headrest of the driver's seat relative to the liquid crystal module 11 Information (hereinafter referred to as “headrest position information”). In this case, the determination unit 44b generates eye part position information by estimating the position of the driver's eyes with respect to the liquid crystal module 11 using the headrest position information acquired from the headrest position acquisition unit 7.

  Moreover, it is good also as a structure which provided both the in-vehicle camera 6 shown in FIG. 8, and the headrest position acquisition part 7 shown in FIG. In this case, the determination unit 44b generates the eye part position information using the headrest position information only when the eye part position information cannot be generated from the image captured by the in-vehicle camera 6 due to a foreign matter attached to the camera lens. Also good.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  DESCRIPTION OF SYMBOLS 1 Display apparatus, 2 GPS receiver, 3 Vehicle speed sensor, 4 Navigation apparatus, 5 Illuminance sensor, 6 In-vehicle camera, 7 Headrest position acquisition part, 11 Liquid crystal module, 12 Backlight drive part, 13 Module rotation part, 41 Gyro sensor , 42 Positioning calculation unit, 43 Storage unit, 44, 44b Determination unit, 45 Comparison unit, 45a Illuminance acquisition unit, 46, 46a Luminance control unit, 47 Attitude control unit, 100, 100a, 100b Display control device.

Claims (3)

In a display control device for controlling a display device provided on a moving body,
A comparison unit that obtains a measurement value of an illuminance sensor that measures the illuminance of a peripheral portion of the display surface of the display device, and compares the measurement value with a threshold;
Reflection of sunlight reflected on the display surface using vehicle state information indicating the current position of the moving object, the current time and the traveling direction of the moving object, and solar position information indicating the azimuth and height of the sun A determination unit that determines whether light is incident on eyes of a passenger of the moving body;
When it is determined that the measured value exceeds the threshold and the reflected light is incident on the eyes of the occupant, the measured value is less than or equal to the threshold and the reflected light is A luminance control unit that increases the luminance value of the display surface than when determined not to enter the eye;
A display control apparatus comprising: In a display control device for controlling a display device provided on a moving body,
An illuminance acquisition unit that acquires a measurement value of an illuminance sensor that measures the illuminance of the peripheral portion of the display surface of the display device;
Reflection of sunlight reflected on the display surface using vehicle state information indicating the current position of the moving object, the current time and the traveling direction of the moving object, and solar position information indicating the azimuth and height of the sun A determination unit that determines whether light is incident on eyes of a passenger of the moving body;
As the measurement value increases, the luminance value of the display surface is increased, and when it is determined that the reflected light is incident on the eyes of the occupant, it is determined that the reflected light does not enter the eyes of the occupant. A luminance control unit for increasing a rate of change of the luminance value with respect to the measurement value than when
A display control apparatus comprising:   The determination unit uses the position of the occupant's eyes estimated by an in-vehicle camera using an image of the occupant's face, the vehicle state information, and the solar position information, and the reflected light is The display control apparatus according to claim 1, wherein the display control apparatus determines whether the light enters the eyes of the passenger.

Images