JP6860385B2 - Image display device - Google Patents

Description

The present invention relates to an image display device, particularly an image display device that eliminates duplication of a transparent image displayed inside a vehicle and a road surface image displayed outside the vehicle.

There is known a vehicle display system that appropriately displays to both the driver of the vehicle and the other party who receives the warning (see Patent Document 1). The vehicle display system disclosed in Patent Document 1 displays images at a plurality of different locations including a driver's display for the driver and another's display for the other.

Japanese Unexamined Patent Publication No. 2004-161033

However, if the images are duplicated when viewed from the occupant when the images are displayed at a plurality of different locations, it becomes difficult for the occupant to accurately understand the image information, which causes confusion for the occupant.

In view of this, the problem to be solved by the present invention is to provide an image display device capable of suppressing or reducing occupant confusion when images are displayed inside and outside the vehicle and are in a mutually overlapping state. That is.

As a means for solving the above-mentioned problems, the image display device according to the present invention is an image display device provided in a vehicle provided with a first image display unit for displaying a transparent image to an occupant in the vehicle. When the second image display unit that displays an image on the road surface, the transparent image of the first image display unit, and the road surface image of the second image display unit overlap, at least one of the transparent image and the road surface image. It is provided with a display control unit for changing the image display form of the above.

It is preferable that the image display device according to the present invention further includes a determination unit for determining the presence or absence of duplication of images based on the image information of the transmissive image and the road surface image.

It is preferable that the image display device according to the present invention further includes a derivation unit that derives image information including at least one of the display area, display amount, display number, and display position of the transmissive image and the road surface image.

The image display device according to the present invention further includes a comparison unit for comparing image information between the transmissive image and the road surface image, and the display control unit displays an image based on the determination result of the determination unit and the comparison result of the comparison unit. It is preferable to change the form.

It is preferable that the image display device according to the present invention further includes a line-of-sight detection unit that detects the line of sight of the occupant, and the determination unit makes a determination based on the image information and the line-of-sight information of the line-of-sight detection unit.

It is preferable that the image display device according to the present invention further includes an evaluation unit for evaluating the safety level based on the surrounding environment of the vehicle, and the display control unit changes the image display form when the safety level is lower than the threshold value.

In the image display device according to the present invention, it is preferable that the display control unit changes the image display form of at least one of the overlapping portion of the transmissive image and the road surface image.

In the image display device according to the present invention, it is preferable that the display control unit changes the color of at least one of the transmissive image and the road surface image.

In the image display device according to the present invention, it is preferable that the display control unit changes the brightness of at least one of the transmissive image and the road surface image.

In the image display device according to the present invention, it is preferable that the second image display unit is composed of a headlamp.

According to the present invention, when duplication occurs, the image display form is changed by changing at least one of the colors or brightness of the transparent image inside the vehicle or the road surface image outside the vehicle, so that even if there is an duplication state, after control. Since the visibility of the image of the image is improved, the invisible state of the information of the duplicate image display is eliminated, and the change of the information content of the entire image is small, so that the image display device capable of suppressing or reducing the confusion of the occupants can be provided. Can be provided.

FIG. 1 is a schematic perspective view showing an image display mode of a vehicle provided with an image display device according to an embodiment of the present invention. FIG. 2 is a schematic view showing the vehicle of FIG. 1 in a side view. FIG. 3 is a schematic view showing the field of view of the occupant who drives only the first image display unit. FIG. 4 is a schematic view showing the field of view of the occupant who drives only the second image display unit. FIG. 5 is a schematic view showing the field of view of the occupant P who drives the first image display unit and the second image display unit. FIG. 6 is a block diagram showing an image display device according to an embodiment of the present invention. FIG. 7 is a flowchart showing a control flow when control for changing the image display form is performed using each member shown in FIG. FIG. 8 is a block diagram showing an image display device according to another embodiment of the present invention. FIG. 9 is a flowchart showing a control flow when control for changing the image display form is performed using the member shown in FIG. FIG. 10 is a flowchart showing a control flow when another change control of the image display form is performed using the member shown in FIG.

(Basic embodiment)
An embodiment of the image display device according to the present invention will be described with reference to FIGS. 1 and 2.
Note that FIG. 1 is a schematic perspective view showing an image display mode of the vehicle 100 provided with the image display device 1 according to the embodiment of the present invention. FIG. 2 is a schematic view showing the vehicle 100 of FIG. 1 in a side view.

As shown in FIGS. 1 and 2, the vehicle 100 includes a first image display unit 10 and a second image display unit 20.

The first image display unit 10 displays the transparent image G1 to the occupant P in the vehicle 100. In the present embodiment, the first image display unit 10 is provided as a head-up display device in which an image emitted from the instrument panel 101 is projected onto the front window 102 of the vehicle 100 and displayed as a transmissive image G1. ..
Instead of projecting the transmissive image G1 on the front window 102 of the present embodiment, it is also possible to adopt a form of projecting on a transparent plate erected in front of the steering wheel and above the instrument panel 101. ..

In the present embodiment, the occupant P is illustrated and described as a driver of the vehicle 100, but in the present invention, the occupant may be able to visually recognize the transparent image of the first image display unit and the road surface image of the second image display unit.

The second image display unit 20 displays the road surface image G2 on the road surface R. In the present embodiment, the second image display unit 20 is provided as a multi-light source headlamp with variable light distribution in the front portion of the vehicle 100.
In the present invention, the second image display unit is not particularly limited as long as it can display an image on the road surface, and may be, for example, a digital mirror device or a projector.

As the form for displaying an image in the present invention, various forms can be adopted as long as the object of the present invention can be achieved. For example, not only those that give meaning to the irradiation form itself such as characters and symbols, but also roads. Examples include signs installed along the road, border light distribution of markings for emphasizing road markings such as regulatory markings and instruction markings, and blinking light distribution superimposed on the marking area.

Further, as shown in FIG. 2, the vehicle 100 is provided with a line-of-sight detection unit 30. The line-of-sight detection unit 30 detects the line of sight of the occupant P shown by the broken line in FIG. Specifically, the line-of-sight detection unit 30 detects information related to the line-of-sight such as the line-of-sight direction by the occupant P by applying a driver monitoring system capable of monitoring the occupant P with an in-vehicle camera. If the line-of-sight information of the occupant P can be detected, a monitoring means other than the driver monitoring system can be adopted.
The usage pattern and the effect of the line-of-sight detection unit 30 will be described later.

Here, the viewpoint of the occupant P when the first image display unit 10 and the second image display unit 20 are driven will be described with reference to FIGS. 3 to 5.
FIG. 3 is a schematic view showing the field of view of the occupant P who drives only the first image display unit 10. FIG. 4 is a schematic view showing the field of view of the occupant P who drives only the second image display unit 20. FIG. 5 is a schematic view showing the field of view of the occupant P who drives the first image display unit 10 and the second image display unit 20.

First, when only the first image display unit 10 is driven, the transparent image G1 is projected and displayed on the front window 102, for example, as shown in FIG. The transmissive image G1 in the present embodiment is displayed as an image that is gradually reduced toward the upper part of the image so that the occupant P can visually recognize the depth. As a result, the occupant P can visually recognize the transparent image G1 as visual information similar to the road marking on the road surface R.

Further, when only the second image display unit 20 is driven, for example, as shown in FIG. 3, a road surface image for notifying a pedestrian W who is trying to cross the road regardless of the approach of the own vehicle 100 is prohibited from crossing. G2 is projected and displayed on the road surface R. The road surface image G2 in the present embodiment is displayed in a direction that the pedestrian W can discriminate and read, and is displayed on the traveling trajectory of the pedestrian W. As a result, the pedestrian W and the occupant P can visually recognize the road surface image G2 as a warning image displayed on the road surface R in the vicinity of the pedestrian W.

The transmissive image G1 shown in FIG. 4 is travel guidance information of the vehicle 100, and includes travel route guidance information indicated by arrow symbols, regulation information at the guide destination indicated by characters, current travel speed information, and the like. Includes. Further, the road surface image G2 shown in FIG. 3 includes warning information for the pedestrian W composed of characters and symbols. The type, area, amount, number, color, brightness, position, display timing, and the like of the information to be displayed as the transparent image G1 and the road surface image G2 are appropriately set for each vehicle 100 or each occupant P.

When both the first image display unit 10 and the second image display unit 20 are driven, for example, as shown in FIG. 5, the transmissive image G1 and the road surface image G2 overlap in the field of view from the inside of the vehicle, especially from the occupant P. May be seen. At this time, when the pedestrian W is used, the road surface image G2 is only displayed on the traveling track, so that the pedestrian W is unlikely to be confused. However, since it is difficult to obtain accurate information from each of the two images in which the occupant P particularly overlaps, the occupant P is likely to be confused.

In order to suppress or reduce such confusion of the occupant P, the vehicle 100 is provided with the image display device 1 shown in FIG. As shown in FIG. 6, the image display device 1 includes a second image display unit 20, a detection unit 40, and a control unit 5.
Note that FIG. 6 is a block diagram showing an image display device 1 according to an embodiment of the present invention.

The detection unit 40 detects at least one of the transparent image G1 of the first image display unit 10 and the road surface image G2 of the second image display unit 20, preferably both. As the image detection form of the detection unit 40, for example, a form in which the presence or absence of an image is directly detected by capturing the front window 102 and the road surface R with an in-vehicle camera can be adopted. Further, as another image detection mode, a signal for displaying an image input from an appropriate in-vehicle CPU to the first image display unit 10 and the second image display unit 20, or the first image display unit 10 and The presence or absence of an image may be indirectly detected by detecting the drive signal of the second image display unit 20 itself.

The control unit 5 includes a lead-out unit 51, a determination unit 52, a display change unit 53, and a comparison unit 54.
The control unit 5 is an example of the display control unit in the present invention. In the present invention, if it is not necessary to perform detailed control according to the display image including the determination unit 52 and the comparison unit 54 described later, the display form of the image display may be changed as the display control unit, for example. Only the display changing unit 53 described later may be provided. Further, as will be described later, in the present embodiment, the control unit 5 is adopted as a member that performs various processes such as determination, comparison, and change of the display form based on the detection result of the detection unit 40, but in the present invention. The control member may be separated for each process.

The derivation unit 51 derives the image information of the transparent image G1 and the road surface image G2. In the present embodiment, the signal related to the image detected by the detection unit 40 is input to the derivation unit 51. The derivation unit 51 derives the image information by analyzing the signal related to the input image.
The image information includes at least one of the display area, display amount, display number, display position, and display content of each image.

The determination unit 52 determines whether or not there is duplication of images based on the image information of the transparent image G1 and the road surface image G2. In the present embodiment, the signal related to the image information derived by the derivation unit 51 is input to the determination unit 52. Based on the signal related to the input image information, the determination unit 52 determines whether or not the transmissive image G1 and the road surface image G2 appear to overlap from the inside of the vehicle, or whether or not there is a high probability that they will appear to overlap. Will be done.

When the transparent image G1 and the road surface image G2 overlap based on the detection result of the detection unit 40, the display changing unit 53 has an image display form of at least one of the transparent image G1 and the road surface image G2. To change. In the present embodiment, the determination unit 52 inputs a signal relating to the presence or absence of duplication to the display change unit 53. The display changing unit 53 improves the visibility of at least one of the image displays of the first image display unit 10 and the second image display unit 20, which appear to be duplicated, by changing the display form even in the overlapping state. ..

As a mode of changing the image display by the display changing unit 53, the visibility of the image seen from the inside of the vehicle is improved by changing at least one of the transparent image G1 and the road surface image G2 while maintaining the display content. As long as it can be done, various modification modes can be adopted. Examples of this change mode include a mode in which the color of one or both images is changed, a mode in which the brightness of the image is changed, and the like. Specifically, as a mode for changing the color and brightness of the image, for example, a mode for actually changing the color or brightness of the irradiation light of the image by controlling a drive signal input to the image display unit, and an image. Examples thereof include a mode in which the color or brightness of the displayed image is regulated even if the display unit itself is driven by covering the light irradiation unit of the display unit with a movable colored or light-shielding filter. In the embodiment in which the movable filter is provided, it may be arranged so as to cover at least the area that is likely to be overlapped in the area where each image can be displayed.

It is preferable that the color or brightness of the image is changed so that the transmissive image G1 and the road surface image G2 can be distinguished from each other even if they overlap, and even if they overlap, it is good. It is preferable to set in advance the correlation, combination, etc. of the color or the brightness that can obtain a good visibility.

The comparison unit 54 compares the image information between the transparent image G1 and the road surface image G2. In the present embodiment, the signal related to the image information derived by the derivation unit 51 is input to the comparison unit 54. The comparison unit 54 derives the magnitude of the influence that can occur on the traveling condition of the vehicle 100 when the display form change control is performed on at least one of the transmissive image G1 and the road surface image G2. Compare image information.

The image information may have an influence on the traveling condition of the vehicle 100 depending on the display area, the display amount, the number of displays, and the like, but the image information often has the greatest influence on the image content. As an influence on the traveling situation by the display form change control, there is an element that makes it difficult for the vehicle 100 to maintain the safe traveling state up to that point. As this element, for example, when the brightness of the transmissive image G1 is lowered, the scenery in front of the vehicle and the transmissive image G1 are easily assimilated depending on the weather during traveling, and when the color of the road surface image G2 is changed, Like the signal, the pedestrian W thinks that he / she may cross the road when the color changes, and starts crossing the road that was stopped by the normal road surface image G2.

Preferably, the comparison unit 54 compares the image information that quantifies the magnitude of the influence that may occur on the traveling situation, so that the determination of the image to be controlled by the display change unit 53, which will be described later, is not complicated. Can be easily done. It should be noted that this can be easily executed by setting in advance a conversion table that quantifies the magnitude of the influence on traveling corresponding to various image information.

In the present embodiment, the signal related to the determination result of the presence or absence of image duplication by the determination unit 52 and the signal related to the comparison result of the image information by the comparison unit 54 are input to the display changing unit 53. Based on these, the display change unit 53 performs change control of the image display form and determination control of the side performing the change control.

Here, the control flow when the change control of the image display form is performed using each member shown in FIG. 6 will be described with reference to FIG. 7 shown as a flowchart.

First, the detection unit 40 detects the transparent image G1 and the road surface image G2 shown in FIG. 1 and the like displayed by driving the first image display unit 10 and the second image display unit 20 shown in FIGS. 2 and 6. (Step S1).

Next, the derivation unit 51 derives at least one of the transparent image G1 and the road surface image G2 detected by the detection unit 40, preferably both image information (step S2). At this time, as the image information to be derived, it is sufficient that information that can be determined that the transparent image G1 and the road surface image G2 are seen overlapping from the inside of the vehicle or that the probability thereof is high can be obtained.

For example, since the display area of the transparent image G1 is large, even if the road surface image G2 having a small display area is displayed, there is a high possibility that the occupants in the vehicle will see it in duplicate. In this case, after detecting the drive signal of the first image display unit 10 that a large image is displayed, only the display area of the transmissive image G1 is derived and output to the determination unit 52 used in the next step. good. However, the display area of the transmissive image G1 and the road surface image G2 may be derived without detecting the drive signal of the image display unit. In this case, if the display area of the transparent image G1 exceeds a preset threshold value, only the image information related to the display area of the transparent image G1 can be output to the determination unit 52.

In addition to the display area, threshold values are set in advance for the display amount, the number of displays, the display position, etc., which increase the probability that images will appear duplicated, and if the threshold value is exceeded, the image information exceeding the threshold value is determined. It can be output to the unit 52. It should be noted that all the image information of both the derived images may be output to the determination unit 52 without setting the threshold value or even if there is an image exceeding the threshold value.

Next, the line-of-sight detection unit 30 detects the line of sight of the occupant in the vehicle 100 (step S3). The order of the line-of-sight detection step (step S3) may be reversed from that of step S1 and step S2 before the display form change control of the image display is performed by the display change unit 53.

Based on the image information derived in step S2 and the line-of-sight information of the occupant P detected in step S3, the determination unit 52 determines whether or not there is duplication of images (step S4). Here, in the front window 102 and the road surface R, the determination unit 52 determines whether or not the images overlap on the line of sight of the occupant P based on the line of sight information. If it is determined that the images are duplicated, the process proceeds to the next step (Yes in step S4). If it is determined that the images do not overlap, the occupant P can obtain accurate information from each of the transparent image G1 and the road surface image G2, and confusion is unlikely to occur. Therefore, it is necessary to change the image display form. There is no. In this case, the control flow is kept in the completed state while maintaining each image display until another image is displayed (No in step S4).
As described above in step S2, when the determination unit 52 inputs image information such as a large display area when the probability of image duplication is high, it is determined that there is image duplication without collating with the line-of-sight information. It can also be done (Yes in step S4).

Subsequently, when it is determined that there is duplication of images, the comparison unit 54 compares the image information (step S5). Here, as a preparatory step for deriving an element for determining an image for which display form change control is performed in the next step, the image information of the transmissive image G1 and the image information of the road surface image G2 are, for example, large or small in influence on traveling. The comparison is made based on the viewpoint.

Further, the display changing unit 53 determines the image to be controlled to change the display form (step S6). At this time, based on the comparison result by the comparison unit 54 input to the display change unit 53, it is determined whether to change at least one of the image display forms of the transparent image G1 and the road surface image G2. The display change unit 53 determines a change form that has little influence on the traveling of the vehicle 100 when the display form change control is performed on one image or both images. On the contrary, in this step, when the image display form is changed, the side that maintains the image display that has a great influence on the running may be determined.

Next, the display change unit 53 controls the change of the display form for at least one of the first image display unit 10 and the second image display unit 20, which are the display units of the image display determined to be the control target of the form change. (Step S7). As a result, the color or brightness of the image display of the first image display unit 10 and the second image display unit 20 is changed.

By controlling to change the display form of one or both of the two types of image displays that are duplicated from the viewpoint of the occupant, the visibility of the image display is improved. The image information can be read from the image, and the occupant P is not confused or less likely to be confused about the running of the vehicle 100.

Furthermore, in the transparent image G1 and the road surface image G2, by controlling the change of the image display form, most of the image information such as the display area, the display amount, the number of displays, and the display position does not change. , The information content can be maintained. By reducing the change in the information content, it is possible to reduce the visual recognition of the changed portion by the occupant P before and after the display control, and the extraction and confirmation work by the occupant P of the changed content. As a result, not only the confusion of the occupant P before and after the display control can be suppressed or reduced, but also the occupant P can be concentrated on the safe driving of the vehicle 100.

(Modification example)
Hereinafter, modifications of the present invention will be described.
8 to 10 show a modified example of the image display device according to the present invention.
Note that FIG. 8 is a block diagram showing an image display device 11 according to another embodiment of the present invention. FIG. 9 is a flowchart showing a control flow when control for changing the image display form is performed using the member shown in FIG. FIG. 10 is a flowchart showing a control flow when another change control of the image display form is performed using the member shown in FIG. Members common to the image display device 11 shown in FIG. 8 and the image display device 1 shown in FIG. 6 are designated by a common reference numeral, and detailed description thereof will be omitted.

The difference between the image display device 11 shown in FIG. 8 and the image display device 1 is the presence or absence of the second derivation unit 55, the evaluation unit 56, and the detection means 60. Specifically, the image display device 11 includes a second lead-out unit 55 and an evaluation unit 56 as one member of the control unit 50, and also provides a detection means 60 for control by the evaluation unit 56.

The second derivation unit 55 derives the overlapping portion of the transparent image G1 and the road surface image G2. In the embodiment according to FIG. 8, the signal related to the image information derived by the extraction unit 51 is input to the second extraction unit 55. The second derivation unit 55 derives a portion and a region where the occupant P appears to overlap in the transparent image G1 and the road surface image G2 based on the image information such as the display position and the display area of the image.

In the embodiment according to FIG. 8, the overlapping portion is derived based on the image information, but the signal related to the image detected by the detection unit 40 may be directly input to the second extraction unit 55, in this case. The second derivation unit 55 will perform the image analysis and the derivation of the overlapping portion of the image. Further, a signal related to the line-of-sight information of the occupant P detected by the line-of-sight detection unit 30 may be input to the second derivation unit 55. Will be able to be derived to.

The evaluation unit 56 evaluates the safety level of the vehicle 100 based on the surrounding environment. In the embodiment according to FIG. 8, the signal related to the image detected by the detection means 60 is input to the evaluation unit 56.

The surrounding environment of the vehicle 100 includes, for example, information on pedestrians, information on the passage of other vehicles, information on maps and traveling routes by a navigation system, information on traffic such as traffic regulations, and road surfaces such as rain and snow. It can be recognized based on the information related to the state. Information for recognizing the surrounding environment is obtained by an appropriate detection means 60 such as various sensors, cameras, satellite communication devices, vehicle-to-vehicle communication devices, and road-to-vehicle communication devices.

Further, the safety level of the vehicle 100 can be set as changing according to the magnitude of the influence that the surrounding environment of the vehicle 100 has or can have on the running of the vehicle 100. The above safety levels include, for example, the presence or absence of pedestrians, the direction of travel of pedestrians, the presence or absence of other vehicles, the speed and direction of travel of other vehicles, the content of traffic regulations on and around the travel route, and the wet and dry conditions and freezing conditions. It changes in a complex manner depending on the road surface condition and the like. By registering the magnitude of the effect on the safety level in advance for each element of the surrounding environment, for example, numerically, it becomes easy to derive a complex effect on the safety level based on the detection result by the detection means 60.

In the embodiment according to FIG. 8, the signal related to the overlapping portion of the image by the second derivation unit 55 and the signal related to the evaluation result of the safety degree by the evaluation unit 56 are input to the display changing unit 53. As a result, the display change unit 53 determines the necessity of the form change based on the comparison between the safety level and the threshold value, in addition to the above-mentioned partial change control of the image display form and the determination control of the side performing the change control. The decision control is performed.

As a control flow using the image display device 11, for example, as shown in FIG. 9, when it is determined in step S4 that there is duplication of images, the evaluation unit 56 evaluates the safety level (step S8). .. Here, the evaluation unit 56 determines the difference between the actual safety level based on the information on the surrounding environment of the vehicle 100 detected by the detection means 60 such as the camera for imaging outside the vehicle and various sensors, and the preset safety level threshold value. Evaluates by deriving. The threshold value set here may be, for example, a numerical value of the safety level that may make it difficult to maintain the normal running of the vehicle 100 when the actual safety level is lower.

When the evaluation unit 56 evaluates that the actual safety level is lower than the threshold value, the process proceeds to the next step, the image information comparison step (step S5) (Yes in step S8). When the evaluation unit 56 evaluates that the actual safety level is higher than the threshold value, the control flow is completed while maintaining the image display until another image display is performed (No in step S8).

After the evaluation step (after Yes in step S8), after executing the image information comparison control (step S5) and the control for determining the change control target (step S6) described with reference to FIG. 7, the second derivation unit is described above. The control by 55 is executed. The control by the second derivation unit 55 is the derivation of the overlapping portion of the image (step S9). Here, as a preparatory step for controlling the change of the display form in the next step, it is possible to change the overlapping portion, preferably the color or brightness of the image display, between the image information of the transparent image G1 and the image information of the road surface image G2. Derivation of overlapping parts.

Further, a control for changing the image display form of the overlapping portion derived in the previous step is executed (step S70). When the second derivation unit 55 is not provided, control is performed to change at least one of the image display forms of the transmissive image G1 and the road surface image G2 as described above (step S7), whereas FIG. 9 In the control mode shown in, the display form of only the overlapping portion is changed.

As described above, in the embodiment shown in FIG. 9, even if it is determined that the images are duplicated, the image display form change control is not immediately executed. By providing the evaluation unit 56 in the image display device 11, even if it is difficult for the occupant P to see a part of the information due to the duplication of images, the safety level that does not have a serious influence on the running is maintained. As long as it is, the change control of the image display form is not performed. That is, the change control of the image display form is performed only when the images are duplicated and the actual safety level is lower than the predetermined threshold value. As a result, the vehicle 100 can selectively execute the image display control that is highly necessary and urgent, so that the change of the image display form over time is reduced. When the change in the image with time is reduced, it is possible to further reduce or suppress the situation in which the response of the occupant P to other changes in the driving environment is delayed due to the gaze operation of the changed image display by the occupant P. Become.

Further, by selectively controlling the change of the display form for the overlapping portion of the image in the entire image, the change in the display content can be further reduced, and the impression of the entire image display obtained by the occupant P can be obtained. Since there is almost no change before and after the control, the confusion of the occupant P is greatly suppressed.

As a further modification of the control flow shown in FIG. 9, in the case of No in step S8, the flow is not in the completed state, and as long as step S8 is No, the displayed image is maintained. May adopt a control mode in which the duplication determination step (step S4) and the safety evaluation step (step S8) are repeatedly executed.

Further, another control mode using the image display device 11 shown in FIG. 8 is shown in FIG. The difference between the control flow shown in FIG. 10 and the control flow shown in FIG. 9 is that the control for canceling the form change control of the image display is performed.

As a specific control flow, as shown in FIG. 10, when the actual safety level is evaluated to be lower than a predetermined threshold value in the safety level evaluation step (Yes in step S8), the image display form of the overlapping portion is formed. After executing up to the change step (step S70) of the above, the second safety evaluation step (step S80) is executed. Specifically, when it is assumed that the executed form change control is canceled, that is, when the image display required for the time-varying surrounding environment of the traveling vehicle 100 is executed even if it is in an overlapping state. The second safety evaluation step (step S80) is executed by the evaluation unit 56 re-deriving the difference between the safety level of the vehicle 100 and the predetermined threshold value.

When the evaluation unit 56 evaluates that the re-derivated safety level is higher than the threshold value, that is, the running is not affected or reduced even if the images are duplicated, the next step, the step of canceling the change control of the image display form. (Step S10) (No in step S80). On the other hand, when the re-derived safety level is lower than the threshold value, that is, when the evaluation unit 56 evaluates that overlapping images may affect the running, the safety level is maintained while maintaining the change control of the image display form. The difference between the threshold value and the threshold value is repeatedly derived (Yes in step S80).

Specifically, when the actual safety level is once lower than the predetermined threshold value (Yes in step S8) and then the re-derived safety level becomes higher than the threshold value (No in step S80), the image display mode. Control is performed to release the change control of (step S10). As a result, the changed state of at least one of the image display form of the first image display unit 10 and the second image display unit 20 is released, so that the image display visible to the occupant has the color and brightness before the change. It will be a duplicate image. Even if the image returns to the duplicate image before the change of the display form in this process, the occupant P is confused because the situation where there is no problem in running the vehicle 100 is selected and returned according to the safety level when returning. Hard to occur.

As described above, in the embodiment shown in FIG. 10, not only the image display form change control based on the image duplication determination and the safety evaluation result but also the image display change control based on the safety evaluation result. It will also be possible to return to the previous state.

Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited by the essay and the drawings which form a part of the disclosure of the present invention according to this embodiment. That is, it should be added that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are of course included in the scope of the present invention.

1 and 11: Image display device, 10: First image display unit, 20: Second image display unit, 30: Line-of-sight detection unit, 40: Detection unit, 5 and 50: Control unit, 51: Derivation unit, 52: Judgment Unit, 53: Display change unit, 54: Comparison unit, 55: Second derivation unit, 56: Evaluation unit, 60: Detection means, 100: Vehicle, 101: Instrument panel, 102: Front window, G1: Transparent type Image, G2: Road surface image, P: Crew, R: Road surface, W: Pedestrian

Claims (9)

An image display device provided in a vehicle provided with a first image display unit that displays a transparent image to an occupant in the vehicle.
A second image display unit that displays a road surface image on the road surface,
A determination unit that determines whether or not there is duplication of images viewed from the occupant based on the image information of the transparent image and the road surface image.
The determination unit, and when said transmission type image with the road surface image is determined to be overlapped, the display control unit to change the image display form of have either the said transmission image and the road surface image,
A comparison unit for comparing the image information of the transparent image and the road surface image is provided.
When the determination unit determines that there is duplication of images, the comparison unit compares the image information, and when the image display form of the transparent image and the road surface image is changed, the image display form is changed. Change the image display that has a small effect on the running of the vehicle, and maintain the image display that has a large effect.
Image display device. The comparison unit compares the image information in which the magnitude of the influence that may occur on the driving situation is quantified.
The image display device according to claim 1. A derivation unit for deriving the image information including at least one of the display area, display amount, display number, and display position of the transmissive image and the road surface image is further provided.
The image display device according to claim 2. Further comprising a visual axis detecting unit for detecting the occupant of the line of sight,
The determination unit makes a determination based on the image information and the line-of-sight information of the line-of-sight detection unit.
The image display device according to any one of claims 1 to 3. It is further equipped with an evaluation unit that evaluates the degree of safety based on the surrounding environment of the vehicle.
The display control unit changes the image display form when the safety level is lower than the threshold value.
The image display device according to any one of claims 1 to 4. Wherein the display control unit changes the image display form of at least one of the overlapped portion of the transmission image and the road surface image,
The image display device according to any one of claims 1 to 5. The display control unit changes the color of at least one of the transmissive image and the road surface image.
The image display device according to any one of claims 1 to 6. The display control unit changes the brightness of at least one of the transmissive image and the road surface image.
The image display device according to any one of claims 1 to 7. The second image display unit is composed of a headlamp.
The image display device according to any one of claims 1 to 8.

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