JP2019147451A - Vehicular display control device, vehicular display system, vehicular display control method and program - Google Patents

Abstract

To allow a user to easily recognize the presence or absence of a defect.SOLUTION: A vehicular display control device has a video data acquisition unit 11 that acquires video data from a rear camera 2 that captures the surroundings of a vehicle, a light volume acquisition unit 12 that acquires a light volume outside the vehicle in the rear camera 2 imaging direction, a rear view monitor 5 that displays video data from the rear camera 2, a display control unit 14 that allows video of video data acquired by the video data acquisition unit 11 to be displayed on the rear view monitor 5, and a half mirror 51 disposed on the front side of the rear view monitor 5. The display control unit 14 stops display of the video if the light volume acquired by the light volume acquisition unit 11 is less than a first threshold or if the light volume acquired by the light volume acquisition unit 11 is equal to or more than a second threshold.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle display control device, a vehicle display system, a vehicle display control method, and a program.

  In place of a conventional optical rearview mirror, a technique related to a so-called electronic mirror that captures a rear peripheral area of a vehicle with a rear camera and displays it on a display device is known. When using an electronic mirror, for example, depending on the amount of light around the vehicle, the image displayed by the electronic mirror will be either black or white, and the user may see that the image is based on the amount of ambient light, or the electronic mirror breaks down. It may not be possible to determine whether it is

  There is known a field-of-view support device that allows a viewer to immediately recognize the presence or absence of a failure (see, for example, Patent Document 1). In the technique described in Patent Literature 1, when the visual field support device is normal, a mark image is displayed on the display unit. In addition, if there is a failure in the visibility support device, the mark image is not displayed on the display unit.

Japanese Patent Laid-Open No. 2006-134657

  The technique described in Patent Document 1 displays a video in which a mark image is added to a video obtained by photographing the periphery. When the amount of light outside the vehicle is small, the user may not be able to determine whether a mark image is added to a video of the surrounding area or whether only the mark video is displayed.

  The present invention has been made in view of the above, and an object of the present invention is to make a user easily recognize the presence or absence of a failure.

  In order to solve the above-described problems and achieve the object, a vehicle display control device according to the present invention includes a video data acquisition unit that acquires video data from a camera that captures the periphery of the vehicle, and a shooting direction of the camera. A light amount acquisition unit that acquires a light amount outside the vehicle, a display unit that displays video data from the camera, and a display control unit that displays video of the video data acquired by the video data acquisition unit on the display unit, A reflection unit disposed on the front surface of the display unit and capable of switching between a state in which the image light displayed on the display unit is visibly transmitted and a state in which light incident on the surface is visibly reflected. The display control unit, when the light amount acquired by the light amount acquisition unit is less than a first threshold, or when the light amount acquired by the light amount acquisition unit is greater than or equal to a second threshold greater than the first threshold, Previous Stop the display of the image, characterized in that.

  A vehicle display system according to the present invention includes the vehicle display control device and the camera.

  The vehicle display control method according to the present invention includes a video data acquisition step for acquiring video data from a camera that captures the surroundings of the vehicle, and a light amount acquisition step for acquiring a light amount outside the vehicle in the shooting direction of the camera. The camera is provided on the display unit having a reflection unit arranged on the front surface that can switch between a state in which the image light displayed on the display unit is visibly transmitted and a state in which the light incident on the surface is visibly reflected. A display step for displaying the video data from and a display control step for displaying a video of the video data acquired in the video data acquisition step on a display unit, wherein the display control step is acquired in the light amount acquisition step. When the light amount is less than the first threshold value, or the second threshold value where the light amount acquired by the light amount acquisition step is greater than the first threshold value If it is above, to stop displaying the image.

  The program according to the present invention includes a video data acquisition step of acquiring video data from a camera that captures the surroundings of the vehicle, a light amount acquisition step of acquiring a light amount outside the vehicle in the shooting direction of the camera, and a display unit Video data from the camera is provided on the display unit provided with a reflection unit disposed on the front surface that can switch between a state in which the displayed video light is visibly transmitted and a state in which light incident on the surface is visibly reflected. And a display control step for displaying a video of the video data acquired in the video data acquisition step on a display unit, wherein the display control step is configured such that the light amount acquired in the light amount acquisition step is the first. If it is less than the threshold value, or the light amount acquired by the light amount acquisition step is greater than or equal to the second threshold value greater than the first threshold value. If, stopping the display of the image, a is executed by a computer that acts as a vehicle for the display control device.

  According to the present invention, there is an effect that the user can easily recognize the presence or absence of a failure.

FIG. 1 is a block diagram illustrating a configuration example of the vehicle display system according to the first embodiment. FIG. 2 is a schematic diagram illustrating a configuration example of the vehicle display system according to the first embodiment. FIG. 3 is a front view showing an example of a rear view monitor. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a diagram illustrating an example of icons displayed on the rear view monitor. FIG. 6 is a diagram illustrating another example of icons displayed on the rear view monitor. FIG. 7 is a flowchart illustrating an example of a process flow in the vehicle display system according to the first embodiment. FIG. 8 is a block diagram illustrating a configuration example of the vehicle display system according to the second embodiment. FIG. 9 is a front view illustrating an example of a line-of-sight detection device. FIG. 10 is a flowchart illustrating an example of a process flow in the vehicle display system according to the second embodiment. FIG. 11 is a diagram illustrating another example of icons displayed on the rear view monitor. FIG. 12 is a flowchart illustrating an example of a process flow in the vehicle display system according to the third embodiment.

  Exemplary embodiments of a vehicle display control device 10, a vehicle display system 1, a vehicle display control method, and a program according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by the following embodiment.

[First embodiment]
The vehicle display system 1 is mounted on a vehicle and displays an image obtained by photographing the rear of the vehicle. In addition to what is mounted on the vehicle, the vehicle display system 1 may be a portable device that can be used in the vehicle. FIG. 1 is a block diagram illustrating a configuration example of the vehicle display system according to the first embodiment. FIG. 2 is a schematic diagram illustrating a configuration example of the vehicle display system according to the first embodiment.

  As shown in FIGS. 1 to 3, the vehicle display system 1 includes a rear camera (camera) 2, a light amount sensor 3, a rear view monitor (display unit) 5, and a vehicle display control device 10. FIG. 3 is a front view showing an example of a rear view monitor. 4 is a cross-sectional view taken along line AA in FIG.

  In the present embodiment, as an example, a description will be given on the assumption that an image captured by the rear camera 2 is displayed on the rear view monitor 5. The combination of the camera and the display unit is not limited to this. In the present embodiment, the vehicle display system 1 switches between display and stop of the rear image according to the light quantity outside the vehicle. Stopping the display of the rear video means stopping the output of the video signal or turning off the backlight. In other words, the vehicle display system 1 switches between the electronic mirror mode and the optical mirror mode in accordance with the amount of light outside the vehicle.

  The rear camera 2 is disposed behind the vehicle and photographs the rear of the vehicle. The rear camera 2 is a visible light camera. The rear camera 2 captures a range including the range displayed on the rear view monitor 5. In other words, the rear camera 2 is shooting including a range that is not displayed on the rear view monitor 5. In view of this, the image captured by the rear camera 2 is cut out by the display control unit 14 of the vehicle display control device 10 so that the vehicle user can appropriately recognize the rear using the rear view monitor 5. It is displayed on the monitor 5. The rear camera 2 outputs the captured rear video data to the video data acquisition unit 11 of the vehicle display control device 10.

  The light quantity sensor 3 is arranged behind the vehicle and acquires the light quantity behind the vehicle. The light quantity sensor 3 is disposed in the vicinity of the rear camera 2. The light quantity sensor 3 acquires the light quantity outside the vehicle in the shooting direction of the rear camera 2. In other words, the light quantity sensor 3 can measure the light quantity of at least a part of the photographing range of the rear camera 2. The light quantity sensor 3 outputs the measured light quantity data to the light quantity acquisition unit 12.

  For example, the rear view monitor 5 is an electronic room mirror that allows the user to visually recognize the rear of the vehicle. The rear view monitor 5 can switch between an electronic mirror mode in which the rear is confirmed by an image and an optical mirror mode in which the rear is confirmed by optical reflection.

  In the electronic mirror mode, a rear image is displayed on the rear view monitor 5. In the optical mirror mode, display of the rear image on the rear view monitor 5 is not executed.

  The rear view monitor 5 is disposed on the front surface, and has a reflection section that can switch between a state in which the image light displayed on the rear view monitor 5 is transmitted in a visible manner and a state in which the light incident on the surface is reflected in a visible manner. . For example, the reflection unit transmits the image light displayed on the rear view monitor 5 in a visible manner by displaying and stopping the image on the display unit, or turning on and off the backlight, and the light incident on the surface. It is a half mirror that switches between a state that reflects in a visible manner. Or, for example, the reflection unit reflects the image light displayed on the rear view monitor 5 in a visually recognizable manner by changing the voltage so that the surface becomes a transmission surface or a mirror surface and reflects the light incident on the surface in a visible manner. It is good also as what is called an electronic shutter which switches the state to perform. In the present embodiment, the reflection unit will be described as the half mirror 51.

  Here, the state in which the image light is transmitted so as to be visible is a state in which the image light displayed on the rear view monitor 5 is transmitted so that the user can confirm the rear by the rear image. The state in which the image light is visibly transmitted may restrict the reflection of the light incident on the surface. Or if the state which permeate | transmits image light so that visual recognition is possible is a grade which does not prevent a user visually recognizing a back image, the light which injected on the surface may reflect.

  The state in which light incident on the surface is recognizable and reflected is a state in which the user can confirm the rear by optical reflection. The state in which the light incident on the surface is reflected so as to be visible may restrict transmission of the image light. Alternatively, the image light may be transmitted as long as the light incident on the surface is recognizable so as not to prevent the user from visually recognizing the optical reflection.

  The rear view monitor 5 includes a half mirror 51 for confirming the rear by optical reflection, a display 52 for confirming the rear by an image, and a backlight 53. The display 52 is arranged so as to overlap the half mirror 51. The display 52 is a display including, for example, a liquid crystal display (LCD) or an organic EL (Organic Electro-Luminescence) display.

  The rear view monitor 5 is disposed at a position that is easily visible to the user. In the present embodiment, as shown in FIG. 2, the rear view monitor 5 is disposed at the center upper portion of the windshield in the vehicle width direction in front of the user of the vehicle. The rear view monitor 5 may be disposed at the center upper portion of the dashboard in the vehicle width direction.

  The rear view monitor 5 displays a rear image of the vehicle based on the video signal output from the display control unit 14 of the vehicle display control device 10 in the electronic mirror mode. The rear view monitor 5 displays a rear image cut out in a range equivalent to the range visually recognized by the conventional optical room mirror, in other words, in the rear cut-out range.

  The rear view monitor 5 stops outputting video signals from the display control unit 14 of the vehicle display control device 10 in the optical mirror mode. Alternatively, the rear view monitor 5 may turn off only the backlight in the optical mirror mode. The rear view monitor 5 causes the rear of the vehicle to be optically reflected by the half mirror 51 for visual recognition.

  The rear view monitor 5 configured as described above is switched between the electronic mirror mode and the optical mirror mode according to the amount of light around the vehicle under the control of the vehicle display control device 10. The rear view monitor 5 can switch between an electronic mirror mode and an optical mirror mode, for example, when a user operates a switching button (not shown).

  The vehicle display control device 10 is, for example, an arithmetic processing device (control unit) configured by a CPU (Central Processing Unit) or the like. The vehicle display control device 10 includes a video data acquisition unit 11, a light amount acquisition unit 12, and a display control unit 14. The vehicle display control device 10 executes a command included in a program stored in a storage unit (not shown). The vehicle display control device 10 includes an internal memory (not shown), and the internal memory is used for temporary storage of data in the vehicle display control device 10.

  The video data acquisition unit 11 acquires rear video data obtained by photographing the rear of the vehicle. The rear video data acquired by the video data acquisition unit 11 is, for example, video data in which images of 60 frames per second are continuous. In the present embodiment, the video data acquisition unit 11 acquires the rear video data output from the rear camera 2. The video data acquisition unit 11 outputs the acquired rear video data to the display control unit 14.

  The light quantity acquisition unit 12 acquires the light quantity in the shooting direction of the rear camera 2. The light quantity acquisition unit 12 acquires the light quantity data measured by the light quantity sensor 3.

  The display control unit 14 switches between the electronic mirror mode and the optical mirror mode according to the amount of light around the vehicle. More specifically, the display control unit 14 outputs a video signal for displaying a rear video on the rear view monitor 5 or stops the output in accordance with the amount of light around the vehicle. Alternatively, the display control unit 14 switches between the electronic mirror mode and the optical mirror mode when the switch button is pressed by the user. More specifically, the display control unit 14 outputs a video signal for displaying a rear video on the rear view monitor 5 or stops outputting each time the switch button is pressed by the user.

  In the electronic mirror mode, the display control unit 14 cuts out a predetermined cutout range from the rear video data acquired by the video data acquisition unit 11 and causes the rear view monitor 5 to display the rear video.

  The display control unit 14 displays an icon 100 that can distinguish between the electronic mirror mode and the optical mirror mode. More specifically, when the display control unit 14 operates in the electronic mirror mode and displays the rear image on the rear view monitor 5, the display control unit 14 superimposes the icon 100 indicating the electronic mirror mode on a predetermined position of the rear image. indicate. When the display control unit 14 operates in the optical mirror mode and stops displaying the rear image, the display control unit 14 displays the icon 100 indicating the optical mirror at a predetermined position on the display 52 and overlaps the predetermined position on the half mirror 51. indicate.

  The predetermined position is, for example, a position close to the driver seat of the rear view monitor 5. When the vehicle is a right-hand drive vehicle, the predetermined position is the lower right. When the vehicle is a left-hand drive vehicle, the predetermined position is the lower left.

  The icon 100 will be described with reference to FIGS. FIG. 5 is a diagram illustrating an example of icons displayed on the rear view monitor. FIG. 6 is a diagram illustrating another example of icons displayed on the rear view monitor. The icon 100 shown in FIG. 5 indicates that the displayed rear image is being viewed. Displayed when the rear video is being displayed on the rear view monitor 5. The icon 100 shown in FIG. 6 indicates that the mirror image optically reflected by the half mirror 51 is visually recognized. Displayed when the rear video display is stopped.

  A storage unit (not shown) stores data required for various processes and various processing results in the vehicle display control apparatus 10. The storage unit is, for example, a semiconductor memory device such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory (Flash Memory), or a storage device such as a hard disk, an optical disk, or an external storage device via a network. is there. Alternatively, an external storage device that is wirelessly connected via a communication device (not shown) may be used.

  Next, the flow of processing by the vehicle display control apparatus 10 will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of a process flow in the vehicle display system according to the first embodiment. As a premise in the processing of the flowchart shown in FIG. 7, the rear camera 2 captures a rear image of the rear of the vehicle while the vehicle is operating. As a premise in the processing of the flowchart shown in FIG. 7, the light amount sensor 3 constantly measures the amount of light outside the vehicle while the vehicle is operating.

  The operation of the vehicle means that the drive source of the vehicle is operating, for example, the engine is turned on or the power is turned on.

  The vehicle display control device 10 determines whether or not the light amount is less than a predetermined amount (step ST11). More specifically, when the light amount in the photographing direction of the rear camera 2 is less than the first threshold based on the light amount data acquired by the light amount acquisition unit 12 (Yes in step ST11), the vehicle display control device 10 performs step ST12. Proceed to The threshold value of the light amount in the determination in step ST11 is a light amount such that the entire range of the rear image data captured by the rear camera 2 becomes a monotone monotone image of black. If the light amount in the photographing direction of the rear camera 2 is not less than the first threshold based on the light amount data acquired by the light amount acquisition unit 12 (No in step ST11), the vehicle display control device 10 proceeds to step ST15.

  When the amount of light is less than the predetermined value (Yes in step ST11), the vehicle display control device 10 determines whether or not the optical mirror mode is set (step ST12). More specifically, when the display control unit 14 does not display a rear image, the vehicular display control device 10 determines that the optical mirror mode is set (Yes in step ST12), and proceeds to step ST13. When the display control unit 14 displays the rear video, the vehicle display control apparatus 10 determines that the optical mirror mode is not set (No in step ST12), and proceeds to step ST14.

  When the optical mirror mode is set (Yes in step ST12), the vehicle display control device 10 continues the optical mirror mode (step ST13). More specifically, the vehicular display control device 10 causes the display control unit 14 to continue stopping the rear video. The vehicle display control apparatus 10 returns to step ST11 and repeats the process.

  When not in the optical mirror mode (No in step ST12), the vehicle display control apparatus 10 changes to the optical mirror mode (step ST14). More specifically, the vehicle display control device 10 causes the display control unit 14 to stop displaying the rear video. The vehicle display control apparatus 10 returns to step ST11 and repeats the process.

  When the amount of light is not less than the predetermined amount (No in step ST11), the vehicle display control device 10 determines whether or not the optical mirror mode is set (step ST15). More specifically, when the display control unit 14 does not display a rear image, the vehicular display control device 10 determines that the optical mirror mode is set (Yes in step ST15), and proceeds to step ST16. The vehicle display control device 10 determines that the optical mirror mode is not set when the display control unit 14 displays the rear image (No in step ST15), and ends the process.

  When the optical mirror mode is set (Yes in step ST15), the vehicle display control device 10 changes to the electronic mirror mode (step ST16). More specifically, the vehicle display control device 10 causes the display control unit 14 to display a rear image. The vehicle display control device 10 ends the process.

  The vehicle display control apparatus 10 repeats such processing at predetermined intervals, for example, every frame or every predetermined frame.

  In this way, the vehicle display control device 10 stops the display of the rear image and switches to the optical mirror mode when the amount of light outside the vehicle is less than a predetermined amount. The vehicle display control device 10 displays, for example, an icon 100 as shown in FIG. 5 at a predetermined position of the rear view monitor 5 in the electronic mirror mode. The vehicle display control device 10 displays, for example, an icon 100 as shown in FIG. 6 at a predetermined position on the rear view monitor 5 in the optical mirror mode.

  As described above, in the present embodiment, when the amount of light outside the vehicle is less than a predetermined value and the surroundings of the vehicle are dark, display of the rear image is stopped and the mode is switched to the optical mirror mode. In the present embodiment, when the outside of the vehicle is dark, the optical mirror mode can be easily recognized by reflecting the interior of the vehicle interior in the half mirror 51 by setting the optical mirror mode. Thereby, in this embodiment, the user can grasp | ascertain easily that the display system 1 for vehicles is not out of order. According to the present embodiment, it is possible to prevent the user from being able to determine whether the surroundings are dark or the electronic mirror is broken. Thus, this embodiment can make a user recognize the presence or absence of a failure easily.

  In the present embodiment, an icon 100 for discriminating between the electronic mirror mode and the optical mirror mode is displayed on the rear view monitor 5. Thereby, in this embodiment, the user can recognize whether it is an electronic mirror mode or an optical mirror mode. In the present embodiment, since the icon 100 is displayed, the presence or absence of a failure can be easily recognized.

[Second Embodiment]
A vehicle display system 1A according to the present embodiment will be described with reference to FIGS. FIG. 8 is a block diagram illustrating a configuration example of the vehicle display system according to the second embodiment. FIG. 9 is a front view illustrating an example of a line-of-sight detection device. FIG. 10 is a flowchart illustrating an example of a process flow in the vehicle display system according to the second embodiment. The vehicle display system 1A has the same basic configuration as the vehicle display system 1 of the first embodiment. In the following description, the detailed description of the same components as those of the vehicle display system 1 is omitted. The vehicle display system 1A is different from the vehicle display system 1 of the first embodiment in that it includes a line-of-sight sensor 6A and a line-of-sight detection unit 15A. The vehicle display system 1A is different from the vehicle display system 1 of the first embodiment in the processing in the vehicle display control device 10A.

  The line-of-sight sensor 6A detects the user's line of sight. The line-of-sight sensor 6 </ b> A is disposed in the vicinity of the rear view monitor 5 so as to face the driver's seat. In the present embodiment, the line-of-sight sensor 6 </ b> A is disposed on the upper side of the rear view monitor 5. The line-of-sight sensor 6A includes, for example, a pair of infrared cameras 61A and an infrared light emitting unit 62A configured by an infrared LED group. In the present embodiment, the line-of-sight sensor 6A irradiates infrared light in the face direction of the user with the infrared light emitting unit 62A, and images with the pair of infrared cameras 61A. Based on the captured image captured by the infrared camera 61A in this manner, it is determined whether the user's line of sight is facing the rear view monitor 5 based on the user's pupil and the position of corneal reflection. The line-of-sight sensor 6A may have another configuration having the same function. The line-of-sight sensor 6 </ b> A outputs the detection result to the line-of-sight detection unit 15 </ b> A of the vehicle display control device 10.

  The line-of-sight detection unit 15 </ b> A detects whether or not the user's line of sight faces the display surface 5 a of the rear view monitor 5 based on the detection result of the line-of-sight sensor 6 </ b> A. More specifically, the line-of-sight detection unit 15A detects the user's pupil and the position of corneal reflection from the captured image captured by the infrared camera 61A, and whether or not the user's line of sight faces the display surface 5a of the rear view monitor 5. Determine whether.

  The display surface 5 a of the rear view monitor 5 faces the user on the rear view monitor 5. The display surface 5 a of the rear view monitor 5 includes at least one of the surface of the half mirror 51 and the surface of the display 52.

  Next, the flow of processing performed by the vehicle display control apparatus 10A will be described with reference to FIG. The vehicle display control apparatus 10A performs processing according to the flowchart, and Step ST21 and Step ST23 to Step ST27 perform processing similar to Step ST11 and Step ST12 to Step ST16 of the first embodiment. As a premise in the process of the flowchart shown in FIG. 10, the line-of-sight sensor 6 </ b> A detects the line of sight of the user while the vehicle is operating.

  The vehicle display control apparatus 10A determines whether or not the line of sight is facing the rear view monitor 5 (step ST22). More specifically, the vehicle display control apparatus 10A acquires the detection result of the line-of-sight sensor 6A by the line-of-sight detection unit 15A, and determines that the user's line of sight is facing the rear view monitor 5 (Yes in step ST22), step Proceed to ST23. When the vehicle display control apparatus 10A acquires the detection result of the line-of-sight sensor 6A by the line-of-sight detection unit 15A and determines that the user's line of sight is not facing the rear view monitor 5 (No in step ST22), the process returns to step ST21. Repeat the process.

  In this way, the vehicle display control device 10 stops the display of the rear image and enters the optical mirror mode when the surroundings of the vehicle are dark and the user's line of sight is facing the rear view monitor 5. .

  As described above, in the present embodiment, the display of the rear image is stopped and the optical mirror mode is set only when the surroundings of the vehicle are dark and the user's line of sight is facing the rear view monitor 5. . According to this embodiment, when the user visually recognizes the rear view monitor 5, it can be prevented that it is impossible to determine whether the surroundings are dark or the electronic mirror is broken.

  In the present embodiment, when the user does not visually recognize the rear view monitor 5, the change to the optical mirror mode is not performed. As a result, the present embodiment can stop the display of the rear video and enter the optical mirror mode only when necessary.

[Third embodiment]
The vehicle display system 1 according to the present embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a diagram illustrating another example of icons displayed on the rear view monitor. FIG. 12 is a flowchart illustrating an example of a process flow in the vehicle display system according to the third embodiment. When the outside of the vehicle is bright, the vehicle display system 1 of the present embodiment stops the display of the rear image and sets the optical mirror mode.

  The fact that the outside of the vehicle is bright means, for example, when the western sun is directly incident on the rear camera 2 or when the western sun is directly incident on the rear view monitor 5. When the western sun is directly incident on the rear camera 2, the rear image captured by the rear camera 2 is flareed and becomes a monotonous image of white. When the western sun is directly incident on the rear view monitor 5, sunlight is reflected by the half mirror 51 and visibility is reduced.

  In the optical mirror mode, the display control unit 14 determines whether the display of the rear image is stopped because the surrounding of the vehicle is dark and the display of the rear image is stopped because the surrounding of the vehicle is bright. Possible icons 100 are displayed.

  An icon 100 shown in FIG. 11 indicates that the display of the rear image is stopped because the surroundings of the vehicle are bright.

  Based on the light amount data acquired by the light amount acquisition unit 12, the display control unit 14 stops the display of the rear video when the light amount in the shooting direction of the rear camera 2 is equal to or larger than the second threshold value, which is larger than the first threshold value. Set to optical mirror mode. In this case, the display control unit 14 displays the icon 100 shown in FIG.

  Next, the flow of processing by the vehicle display control apparatus 10 will be described with reference to FIG. The vehicle display control apparatus 10 performs processing according to the flowchart, and steps ST32 to ST36 perform the same processing as steps ST12 to ST16 of the first embodiment.

  The vehicle display control device 10 determines whether or not the light amount is greater than or equal to a predetermined amount (step ST31). More specifically, the vehicle display control apparatus 10 determines that the light amount in the photographing direction of the rear camera 2 is equal to or larger than the second threshold based on the light amount data acquired by the light amount acquisition unit 12 (Yes in step ST31). Proceed to The threshold value of the light amount in the determination in step ST31 is a light amount such that the entire range of the rear image data photographed by the rear camera 2 is white and monotonous monotonous image, and the object to be photographed is an unclear image. If the light amount in the photographing direction of the rear camera 2 is not equal to or greater than the second threshold based on the light amount data acquired by the light amount acquisition unit 12 (No in step ST31), the vehicle display control device 10 proceeds to step ST35.

  Thus, when the outside of the vehicle is bright, the display of the rear image is stopped and the optical mirror mode is set. In this case, for example, the vehicle display control apparatus 10 displays an icon 100 as shown in FIG. 11 at a predetermined position of the rear view monitor 5.

  As described above, in the present embodiment, when the amount of light outside the vehicle is greater than or equal to a predetermined value and the surroundings of the vehicle are bright, the display of the rear image is stopped and switched to the optical mirror mode. Furthermore, in this case, in this embodiment, the icon 100 shown in FIG. 11 is displayed. Accordingly, the user can recognize that the optical mirror mode has been switched because the sunlight is strong.

  Each component of the illustrated vehicle display system 1 is functionally conceptual, and may not necessarily be physically configured as illustrated. That is, the specific form of each device is not limited to the one shown in the figure, and all or a part of them is functionally or physically distributed or integrated in arbitrary units according to the processing load or usage status of each device. May be.

  The configuration of the vehicle display system 1 is realized by, for example, a program loaded into a memory as software. The above embodiment has been described as a functional block realized by cooperation of these hardware or software. That is, these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The components described above include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the structures described above can be appropriately combined. In addition, various omissions, substitutions, or changes in the configuration can be made without departing from the scope of the present invention.

  Although the light quantity acquisition part 12 demonstrated as what acquires the light quantity data which the light quantity sensor 3 measured, it is not limited to this. The light quantity acquisition unit 12 performs image processing on the rear video data acquired by the video data acquisition unit 11, binarizes the rear video data into white and black, and based on the area ratio between white and black, the vehicle You may acquire the light quantity outside. When the black area ratio (black ratio) acquired by the light quantity acquisition unit 12 is equal to or greater than a predetermined value, the vehicle display control apparatus 10 determines that the light quantity is less than the predetermined value, and the black area ratio is predetermined. When the value is less than the value, it may be determined that the light amount is not less than the predetermined value. The predetermined value of the black area ratio is a value such that the entire range of the rear video data captured by the rear camera 2 becomes a monotone monotone video with a single black color. For this reason, both the case where the black area ratio is a predetermined value and the case where the amount of light in the first embodiment is the first threshold value are monotonous monotone images in which the entire range of the rear image data is black. Alternatively, when the white area ratio (white ratio) acquired by the light quantity acquisition unit 12 is greater than or equal to a predetermined value, the vehicle display control apparatus 10 determines that the light quantity is greater than or equal to the predetermined value, and the white area ratio is predetermined. If it is less than the value, it may be determined that the light quantity is not greater than or equal to a predetermined value. The predetermined value of the white area ratio is a value such that the entire range of the rear video data photographed by the rear camera 2 becomes a monotone monotone video with a single white color, and the subject to be shot becomes an unclear video. For this reason, both the case where the white area ratio is a predetermined value and the case where the amount of light in the third embodiment is the second threshold value are monotonous monotone images in which the entire range of the rear video data is white.

  In the above description, the light amount acquisition unit 12 has been described as always acquiring the light amount data from the light amount sensor 3, but the present invention is not limited to this. For example, the light amount acquisition unit 12 may acquire light amount data only when it is nighttime based on time information. Alternatively, the light amount acquisition unit 12 is, for example, at night based on time information, and only when there is no building or lighting device at a predetermined distance around the vehicle based on the current position information and map information of the vehicle. Data may be acquired.

  Although the rear view monitor 5 has been described above, the present invention is not limited to this. For example, the present invention can be applied to a side view monitor display system.

1 Display system for vehicles 2 Rear camera (camera)
3 Light sensor 5 Rear view monitor (display unit)
51 Half mirror (reflection part)
DESCRIPTION OF SYMBOLS 10 Display control apparatus for vehicles 11 Image | video data acquisition part 12 Light quantity acquisition part 14 Display control part 100 Icon

Claims (8)

A video data acquisition unit that acquires video data from a camera that captures the surroundings of the vehicle;
A light amount acquisition unit for acquiring a light amount outside the vehicle in the shooting direction of the camera;
A display unit for displaying video data from the camera;
A display control unit for displaying a video of the video data acquired by the video data acquisition unit on a display unit;
A reflection unit disposed on the front surface of the display unit and capable of switching between a state in which video light displayed on the display unit is visibly transmitted and a state in which light incident on the surface is visibly reflected;
With
When the light amount acquired by the light amount acquisition unit is less than a first threshold value, or when the light amount acquired by the light amount acquisition unit is greater than or equal to a second threshold value greater than the first threshold value, the display control unit The display control apparatus for vehicles characterized by stopping display of this.   The vehicle display control device according to claim 1, wherein the display control unit displays an icon capable of discriminating between when the display of the video is being executed and when the display of the video is stopped. A line-of-sight detection unit that acquires a detection result from a line-of-sight detection device that detects the line of sight of the user facing the display unit;
Further comprising
The display control unit further stops the display of the video when the line-of-sight detection unit detects that the user's line of sight faces the display unit.
The vehicle display control device according to claim 1. The light amount acquisition unit acquires the light amount outside the vehicle in the shooting direction of the camera from the black ratio in the video data acquired by the video data acquisition unit,
The display control unit stops displaying the video when the light amount acquired by the light amount acquisition unit is less than a first threshold.
The display control apparatus for vehicles as described in any one of Claim 1 to 3. The light amount acquisition unit acquires the light amount outside the vehicle in the shooting direction of the camera from the white ratio in the video data acquired by the video data acquisition unit,
The display control unit stops displaying the video when the light amount acquired by the light amount acquisition unit is equal to or greater than a second threshold.
The display control apparatus for vehicles as described in any one of Claim 1 to 3. A vehicle display control device according to any one of claims 1 to 5,
A vehicle display system comprising the camera. A video data acquisition step of acquiring video data from a camera that captures the surroundings of the vehicle;
A light amount acquisition step of acquiring a light amount outside the vehicle in the shooting direction of the camera;
From the camera to the display unit having a reflection unit arranged on the front surface that can be switched between a state in which the image light displayed on the display unit is visibly transmitted and a state in which light incident on the surface is visibly reflected. A display step for displaying the video data of
A display control step of displaying a video of the video data acquired by the video data acquisition step on a display unit;
Including
In the display control step, when the light amount acquired by the light amount acquisition step is less than a first threshold value, or when the light amount acquired by the light amount acquisition step is greater than or equal to a second threshold value greater than the first threshold value, the video Stop showing,
Vehicle display control method. A video data acquisition step of acquiring video data from a camera that captures the surroundings of the vehicle;
A light amount acquisition step of acquiring a light amount outside the vehicle in the shooting direction of the camera;
From the camera to the display unit having a reflection unit arranged on the front surface that can be switched between a state in which the image light displayed on the display unit is visibly transmitted and a state in which light incident on the surface is visibly reflected. A display step for displaying the video data of
A display control step of displaying a video of the video data acquired by the video data acquisition step on a display unit;
Including
In the display control step, when the light amount acquired by the light amount acquisition step is less than a first threshold value, or when the light amount acquired by the light amount acquisition step is greater than or equal to a second threshold value greater than the first threshold value, the video Stop displaying
For causing a computer that operates as a display control device for a vehicle to execute.

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