In-vehicle display device, in-vehicle display method, and program

Abstract

The present invention provides an in-vehicle display device that can properly display information even if there is a malfunction in the display of information provided to passengers via a mobile device and a vehicle display terminal. [Solution] The in-vehicle display device 3 is an in-vehicle display device 3 that displays either an in-vehicle image of in-vehicle equipment 10, 10a, 10b, 10c mounted in the vehicle 2, or a terminal image of a mobile terminal 5 held by a passenger in the vehicle 2, on an in-vehicle display terminal 50 mounted in the vehicle 2, and comprises a first image acquisition unit 11 that acquires a terminal image from the mobile terminal 5, a second image acquisition unit 21 that acquires an in-vehicle image from in-vehicle equipment 10, 10a, 10b, 10c, a malfunction detection unit 42 that detects a drawing malfunction in the terminal image generation process, and a display control unit 31 that switches from the terminal image to an in-vehicle image and displays the in-vehicle image on the in-vehicle display terminal 50 when the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process.

Description

Technical Field

[0005] , ,

[0001] The present disclosure relates to an in-vehicle display device, an in-vehicle display method, and a program.

Background Art

[0002] In recent years, next-generation applications that display information from a mobile terminal on an in-vehicle display have become widespread. In the next-generation applications, all necessary information from the vehicle is aggregated on the mobile terminal via the in-vehicle unit, and then full-screen drawing is performed on the mobile terminal. The drawn image is encoded and transferred as a video stream to the in-vehicle display for display on the in-vehicle display.

[0003] For example, Patent Document 1 discloses a vehicle display device that selects information based on preset selection conditions during a period when communication between an information acquisition unit and a mobile terminal is invalid, and displays the selected information on a display unit. According to this vehicle display device, useful information can be displayed on the display unit even when communication with the mobile terminal is not possible.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, while the vehicle display device described in Patent Document 1 determines the effectiveness of communication between the information acquisition unit and the mobile terminal, it does not cover failure patterns such as poor contact in the communication line in wired communication. Furthermore, in the vehicle display device described in Patent Document 1, if a communication disconnection occurs with the mobile terminal, information selected based on pre-set selection conditions can be displayed on the display unit. However, depending on the selection conditions, the time required from the time of communication disconnection until the selected information is displayed on the display unit may be prolonged. If the mobile terminal remains disconnected for an extended period, the information displayed on the vehicle display terminal will not be updated for a long time, which may endanger the safety of passengers depending on the content. Therefore, there is a problem in that if there is a malfunction in the display of information provided to passengers from the mobile terminal via the vehicle display terminal, the information cannot be displayed appropriately.

[0006] Therefore, the purpose of this disclosure is to provide an in-vehicle display device, etc., that can properly display information even if there is a malfunction in the display of information provided to passengers from a mobile terminal via an in-vehicle display terminal. [Means for solving the problem]

[0007] An in-vehicle display device according to one aspect of the present disclosure is an in-vehicle display device that displays either an in-vehicle image of an in-vehicle device mounted in a vehicle, or a terminal image of a mobile terminal held by a passenger in the vehicle, on an in-vehicle display terminal mounted in the vehicle, comprising: a first image acquisition unit that acquires the terminal image from the mobile terminal; a second image acquisition unit that acquires the in-vehicle image from the in-vehicle device; a malfunction detection unit that detects a drawing malfunction in the terminal image generation process; and a display control unit that, when the malfunction detection unit detects a drawing malfunction in the terminal image generation process, switches from the terminal image to the in-vehicle image and displays the in-vehicle image on the in-vehicle display terminal.

[0008] Furthermore, an in-vehicle display method according to one aspect of the present disclosure is an in-vehicle display method for displaying either an in-vehicle image of an in-vehicle device installed in a vehicle, or a terminal image of a mobile terminal held by a passenger in the vehicle, on an in-vehicle display terminal installed in the vehicle, comprising: a first image acquisition unit acquiring the terminal image from the mobile terminal; a second image acquisition unit acquiring the in-vehicle image from the in-vehicle device; a malfunction detection unit detecting a drawing malfunction in the terminal image generation process; and, when the malfunction detection unit detects a drawing malfunction in the terminal image generation process, switching from the terminal image to the in-vehicle image, and a display control unit displaying the in-vehicle image on the in-vehicle display terminal.

[0009] Furthermore, a program relating to one aspect of this disclosure is a program for a computer to execute an in-vehicle display method. [Effects of the Invention]

[0010] According to one aspect of this disclosure, an in-vehicle display device, etc., can appropriately display information even if a malfunction occurs in the display of information provided to passengers from a mobile terminal via a vehicle display terminal. [Brief explanation of the drawing]

[0011] [Figure 1A] Figure 1A is a schematic diagram showing a display control system according to an embodiment installed in a vehicle. [Figure 1B] Figure 1B is a block diagram showing a display control system according to an embodiment. [Figure 2] Figure 2 shows a drawing error. [Figure 3] Figure 3 is another block diagram showing a display control system according to an embodiment. [Figure 4] Figure 4 shows an image displayed by an in-vehicle display terminal. [Figure 5] Figure 5 is yet another block diagram showing a display control system according to an embodiment. [Figure 6]FIG. 6 is a sequence diagram showing an operation example 1 of the display control system. [Figure 7] FIG. 7 is a sequence diagram showing an operation example 2 of the display control system. [Figure 8] FIG. 8 is a sequence diagram showing an operation example 3 of the display control system. [Figure 9] FIG. 9 is yet another block diagram showing a display control system according to other modification examples.

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] Hereinafter, embodiments will be specifically described with reference to the drawings.

[0013] Note that all of the embodiments described below show comprehensive or specific examples. Numerical values, shapes, materials, components, the arrangement positions and connection forms of components, steps, the order of steps, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. In addition, among the components in the following embodiments, components not described in the independent claims are described as optional components.

[0014] Also, each figure is a schematic diagram and is not necessarily drawn precisely. In each figure, the same reference numerals are given to the same constituent members.

[0015] (Embodiment) <Configuration and Function> First, the configuration and function of the display control system 1 will be described with reference to FIGS. 1A to 2.

[0016] FIG. 1A is a schematic diagram showing the display control system 1 according to the embodiment mounted on the vehicle 2. FIG. 1B is a block diagram showing the display control system 1 according to the embodiment. FIG. 2 is a diagram showing drawing defects. (a) of FIG. 2 shows the defect when it is plain white or black. (b) of FIG. 2 shows the defect when there is no update. (c) of FIG. 2 shows the defect when the drawing frame collapses.

[0017] As shown in FIGS. 1A and 1B, the display control system 1 is a system that can display an image on one or more in-vehicle display terminals 50 mounted on the vehicle 2. The image displayed by the one or more in-vehicle display terminals 50 is an in-vehicle image related to the vehicle 2 or a terminal image output by the mobile terminal 5. The in-vehicle image and the terminal image include display information such as, for example, an image of a vehicle instrument, an operating status of vehicle-related devices, navigation information, an imaging image inside and outside the vehicle cabin of the vehicle 2, and information on surrounding vehicles. The image of the vehicle instrument is an image showing a speedometer, a direction indicator light, a warning light, an odometer, a shift position, a fuel gauge, a water temperature gauge, and the like. Vehicle-related devices are, for example, an acoustic device, an in-vehicle lighting device, and a seat device. The navigation information is information for guiding the user to the current position and the route to the destination when the vehicle 2 is running. The imaging image is an image captured by an imaging device mounted on the vehicle 2 of the surrounding or the interior of the vehicle 2. The surrounding vehicle information is information indicating the presence, number, speed of other vehicles existing around the vehicle 2, and the distance from the vehicle 2 to other vehicles.

[0018] As shown in FIG. 1B, the display control system 1 includes an in-vehicle display device 3 and an in-vehicle display terminal 50.

[0019] The in-vehicle display device 3 causes an in-vehicle display terminal 50 mounted on the vehicle 2 to display either an in-vehicle image of an in-vehicle device 10 mounted on the vehicle 2 or a terminal image of a mobile terminal 5 possessed by a passenger boarding the vehicle 2. For example, when the in-vehicle display device 3 is communicably connected to the mobile terminal 5, the in-vehicle display device 3 can cause the in-vehicle display terminal 50 to display the terminal image of the mobile terminal 5. Also, when the in-vehicle display device 3 is not communicably connected to the mobile terminal 5, the in-vehicle display device 3 can cause the in-vehicle display terminal 50 to display the in-vehicle image. In the present embodiment, unless otherwise specified, it is assumed that the in-vehicle display device 3 is communicably connected to the mobile terminal 5.

[0020] Here, mobile device 5 is a device possessed by a passenger in vehicle 2, and is, for example, a smartphone, tablet, etc.

[0021] The in-vehicle display device 3 comprises an in-vehicle device 10 and a monitoring device 40.

[0022] The in-vehicle device 10 acquires either an in-vehicle image or a terminal image, and performs processing to display either acquired image on the in-vehicle display terminal 50.

[0023] Specifically, the in-vehicle device 10 includes a first image acquisition unit 11, a terminal memory 12, a second image acquisition unit 21, an in-vehicle memory 22, a display control unit 31, and a display memory 32.

[0024] The first image acquisition unit 11 is connected to the mobile terminal 5 in a communication-enabled manner and acquires terminal images from the mobile terminal 5. The first image acquisition unit 11 outputs the terminal images acquired from the mobile terminal 5 to the terminal memory 12 in a format that can be displayed on the in-vehicle display terminal 50.

[0025] The terminal memory 12 is a storage medium that holds a storage area such as a frame memory (also called a buffer or surface) for temporarily storing terminal images acquired from the mobile terminal 5. The terminal memory 12 holds the acquired terminal images. Note that the terminal images acquired from the first image acquisition unit 11 may be drawn in advance by the mobile terminal 5 in a format that can be displayed on the in-vehicle display terminal 50, and this embodiment is not limited to this one.

[0026] Here, the monitoring device 40 includes a third image acquisition unit 41 and a malfunction detection unit 42.

[0027] The third image acquisition unit 41 is an input interface for acquiring terminal images held in the terminal memory 12. The third image acquisition unit 41 outputs the terminal images acquired from the terminal memory 12 to the malfunction detection unit 42.

[0028] The malfunction detection unit 42 detects a rendering malfunction in the terminal image generation process. A rendering malfunction is an abnormality or failure in the rendering process in the terminal image generation process.

[0029] For example, the defect detection unit 42 determines whether or not a defect has occurred for each drawing frame (sometimes called a drawing frame) in the terminal image generation process.

[0030] Drawing defects include, for example, as shown in Figures 2(a) to (c), cases where the drawing frame is plain white or black, where there is no change (no update) in a predetermined number of drawing frames, where the colors or patterns are random, or where the drawing frame is corrupted. In cases where the drawing frame is plain white or black, or where the drawing frame is corrupted, the defect detection unit 42 can easily determine this because the drawing frame is white or black, or has random colors or patterns. In cases where there is no change in the drawing frame, the defect detection unit 42 can determine this by checking the difference between the reference drawing frame and the drawing frame before it, and whether the time since the drawing frame update has occurred is longer than a predetermined period.

[0031] As shown in Figure 1B, if the malfunction detection unit 42 determines that a malfunction has occurred in the drawing and detects a malfunction in the drawing, it outputs information indicating the occurrence of a malfunction in the drawing to the display control unit 31. On the other hand, if the malfunction detection unit 42 does not detect a malfunction in the drawing, it determines that there is no malfunction in the drawing and outputs information indicating that the drawing is normal to the display control unit 31.

[0032] Returning to the description of the in-vehicle device 10, the second image acquisition unit 21 of the in-vehicle device 10 may be, for example, an input interface that acquires in-vehicle images from an in-vehicle memory unit (not shown) mounted on the in-vehicle device 10, or it may be an image generation unit that acquires in-vehicle images when a predetermined application generates them. The second image acquisition unit 21 outputs the acquired in-vehicle images to the in-vehicle memory 22.

[0033] The in-vehicle memory 22 is a storage medium that holds a storage area such as a frame memory (also called a buffer or surface) for temporarily storing the in-vehicle images acquired from the second image acquisition unit 21. The in-vehicle memory 22 holds the acquired in-vehicle images.

[0034] The display control unit 31 acquires terminal images from the terminal memory 12 or in-vehicle images from the in-vehicle memory 22. The display control unit 31 outputs one of the acquired images to the display memory 32.

[0035] The display control unit 31 outputs the terminal image or the drawn in-vehicle image to the display memory 32 in order to display the terminal image or the drawn in-vehicle image on the in-vehicle display terminal 50, and displays the terminal image or the drawn in-vehicle image on the in-vehicle display terminal 50 via the display memory 32.

[0036] Furthermore, the display control unit 31 can switch between displaying a drawn terminal image and a drawn in-vehicle image based on instructions from the mobile terminal 5. In other words, when a passenger carrying the mobile terminal 5 operates the mobile terminal 5, the display control unit 31 switches the image displayed on the in-vehicle display terminal 50 between a drawn terminal image and a drawn in-vehicle image according to the instructions given by the operator.

[0037] When the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process, the display control unit 31 switches from the drawn terminal image to the drawn in-vehicle image and displays the drawn in-vehicle image on the in-vehicle display terminal 50. Specifically, since the mobile terminal 5 is connected to the in-vehicle display device 3 in a communication manner, the in-vehicle display device 3 outputs the drawn terminal image to the in-vehicle display terminal 50. However, when the display control unit 31 receives information from the malfunction detection unit 42 indicating the occurrence of a drawing malfunction, it switches from the drawn terminal image to the drawn in-vehicle image and displays the in-vehicle image on the in-vehicle display terminal 50 via the display memory 32. Furthermore, when the display control unit 31 receives information from the malfunction detection unit 42 indicating that the drawing is normal, it continues to display the drawn terminal image on the in-vehicle display terminal 50.

[0038] The display memory 32 is a storage medium that holds a storage area such as a frame memory (also called a buffer or surface) for temporarily storing terminal images or in-vehicle images acquired from the display control unit 31. The display memory 32 outputs the temporarily stored terminal images or in-vehicle images to the in-vehicle display terminal 50.

[0039] Although not shown in the diagram, the display memory 32 may also include a frame memory that holds data for overlapping images.

[0040] The in-vehicle display terminal 50 is an in-vehicle display mounted on the vehicle 2 that displays terminal images or in-vehicle images output from the display memory 32.

[0041] In this embodiment, as shown in Figures 3 and 4, the in-vehicle display device 3 may further have the following configurations and functions. The in-vehicle display device 3 will be described with reference to Figures 3 and 4.

[0042] Figure 3 is another block diagram showing the display control system 1 according to an embodiment. Figure 4 is a diagram showing the image displayed by the in-vehicle display terminal 50. Figure 4(a) shows the terminal image. Figure 4(b) shows the second in-vehicle image. Figure 4(c) shows the first in-vehicle image.

[0043] Specifically, as shown in Figure 3, the second image acquisition unit 21 of the in-vehicle display device 3 has an application unit 23.

[0044] The application unit 23 has a first application and a second application. The application unit 23 can launch a first application for displaying a first in-vehicle image and a second application for displaying a second in-vehicle image that contains less information than the first in-vehicle image. The first in-vehicle image and the second in-vehicle image are included in the in-vehicle image.

[0045] If the mobile terminal 5 is not connected to the in-vehicle display device 3 for communication, the application unit 23 starts the first application. As a result, the display control unit 31 outputs the first in-vehicle image held in the in-vehicle memory 22 to the in-vehicle display terminal 50, and displays the first in-vehicle image on the in-vehicle display terminal 50.

[0046] On the other hand, when the mobile terminal 5 is connected to the in-vehicle display device 3 in a communicative manner, as described above, the display control unit 31 may switch the display from the drawn first in-vehicle image to the drawn terminal image, and after displaying the drawn terminal image on the in-vehicle display terminal 50, the application unit 23 may stop the first application and start the second application. The application unit 23 starts the second application and outputs the second in-vehicle image to the display control unit 31 via the in-vehicle memory 22. At this time, the display control unit 31 does not output the second in-vehicle image held in the in-vehicle memory 22 to the in-vehicle display terminal 50, and the second application is running in the background of the in-vehicle display device 3. Alternatively, after the startup of the second application is complete, the display control unit 31 may switch the display from the drawn first in-vehicle image to the drawn terminal image before stopping the first application.

[0047] In this way, by the display control unit 31 switching the display from the drawn first in-vehicle image to the drawn terminal image, the in-vehicle display terminal 50 can display the drawn terminal image as shown in Figure 4(a).

[0048] Furthermore, if the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process, the display control unit 31 acquires information indicating the occurrence of the drawing malfunction. The display control unit 31 then switches from the drawn terminal image to the drawn second in-vehicle image and displays the drawn second in-vehicle image on the in-vehicle display terminal 50. In other words, as shown in Figure 4(b), the display control unit 31 displays the drawn second in-vehicle image on the in-vehicle display terminal 50.

[0049] Furthermore, when the malfunction detection unit 42 detects a drawing malfunction, the application unit 23 starts the first application after displaying the second in-vehicle image drawn on the in-vehicle display terminal 50. For example, the application unit 23 may start the first application based on instructions from the display control unit 31, which has received information indicating the occurrence of a drawing malfunction, or it may start the first application after receiving information indicating the occurrence of a drawing malfunction from the monitoring device 40. After the startup of the first application is complete, the display control unit 31 switches from the second in-vehicle image held in the in-vehicle memory 22 to the first in-vehicle image held in the in-vehicle memory 22. For this reason, the display control unit 31 displays the first in-vehicle image drawn on the in-vehicle display terminal 50, as shown in Figure 4(c). In other words, the second in-vehicle image is displayed to bridge the period from when a drawing malfunction is detected until the first in-vehicle image drawn on the in-vehicle display terminal 50 is displayed after the startup of the first application is complete.

[0050] As shown in Figure 3, after the first application has finished starting up, the application unit 23 stops the second application. By stopping the second application, which is no longer needed, it is possible to suppress the increase in resources (processing load, power consumption, etc.) of the in-vehicle device 10a.

[0051] Furthermore, in this embodiment, as shown in Figure 5, the in-vehicle display device 3 may have the following configurations and functions. The in-vehicle display device 3 will be described with reference to Figure 5.

[0052] Figure 5 is yet another block diagram showing the display control system 1 according to an embodiment.

[0053] Specifically, the in-vehicle display device 3 comprises an in-vehicle device 10b and a plurality of monitoring devices 40a, 40b. The in-vehicle device 10b includes a plurality of first image acquisition units 11a, 11b, a plurality of terminal memories 12a, 12b, a second image acquisition unit 21, an in-vehicle memory 22, a connection status management unit 33, a plurality of display control units 31a, 31b, and a plurality of display memories 32a, 32b. The in-vehicle display device 3 may also have a plurality of second image acquisition units 21 and a plurality of in-vehicle memories 22, and is not limited to this embodiment.

[0054] Multiple first image acquisition units 11a, 11b, multiple terminal memories 12a, 12b, multiple display control units 31a, 31b, multiple display memories 32a, 32b, and multiple monitoring devices 40a, 40b correspond one-to-one. In addition, multiple in-vehicle display terminals 50a, 50b are mounted on the vehicle 2, and the multiple in-vehicle display terminals 50a, 50b correspond one-to-one with the multiple display control units 31a, 31b. In this embodiment, as an example, two first image acquisition units 11a, 11b, two terminal memories 12a, 12b, two display control units 31a, 31b, two display memories 32a, 32b, and two monitoring devices 40a, 40b are shown as examples. Naturally, this embodiment also includes cases where there are three or more of each of the first image acquisition units 11, terminal memory 12, display control unit 31, display memory 32, and monitoring devices 40.

[0055] The mobile terminal 5 outputs a terminal image to each of the multiple first image acquisition units 11a and 11b. Each of the multiple terminal memories 12a and 12b uses a predetermined application to draw the terminal images acquired via the multiple first image acquisition units 11a and 11b into a format that can be displayed on multiple in-vehicle display terminals 50a and 50b, and outputs the drawn terminal images to multiple display control units 31a and 31b and multiple monitoring devices 40a and 40b in a one-to-one correspondence.

[0056] Here, each of the multiple monitoring devices 40a and 40b outputs information indicating the occurrence of a rendering problem or information indicating that rendering is normal to the multiple display control units 31a and 31b in a one-to-one correspondence based on the result of its determination. In addition, each of the multiple monitoring devices 40a and 40b outputs to the connection status management unit 33 the result of determining whether or not a problem has occurred for each rendering frame in the terminal image generation process held by the terminal memories 12a and 12b, respectively.

[0057] The connection status management unit 33 acquires the results from multiple monitoring devices 40a and 40b and manages multiple display control units 31a and 31b based on the acquired results. Based on the results output by the malfunction detection units 42 of the multiple monitoring devices 40a and 40b, the connection status management unit 33 manages whether to display the terminal image or the displayed in-vehicle image on the multiple in-vehicle display terminals 50a and 50b.

[0058] Specifically, the connection status management unit 33 outputs instructions to multiple display control units 31a and 31b to switch from the drawn terminal image to the drawn in-vehicle image if the number of results indicating a drawing malfunction among the results output by the malfunction detection units 42 of multiple monitoring devices 40a and 40b exceeds a predetermined threshold. Each of the multiple display control units 31a and 31b displays the in-vehicle image on multiple in-vehicle display terminals 50a and 50b via multiple display memories 32a and 32b.

[0059] Furthermore, if the number of results indicating a rendering problem exceeds a predetermined threshold, even if it includes results indicating no rendering problems, it is considered highly likely that problems will occur in the future. Therefore, all rendered terminal images will be replaced with rendered in-vehicle images.

[0060] On the other hand, if the number of results indicating a drawing malfunction among the acquired multiple results is less than a predetermined threshold, the connection status management unit 33 outputs an instruction to the multiple display control units 31a and 31b not to switch from the drawn terminal image to the drawn in-vehicle image. The multiple display control units 31a and 31b then display the drawn terminal image on the multiple in-vehicle display terminals 50a and 50b. For this reason, each of the multiple display control units 31a and 31b displays the terminal image on the multiple in-vehicle display terminals 50a and 50b via the multiple display memories 32a and 32b. The predetermined threshold is, for example, a majority, but is not limited to a majority.

[0061] Furthermore, in the terminal image held by a predetermined terminal memory 12 among the multiple terminal memories 12a and 12b, there may be cases where the drawn frame does not change for a predetermined period of time or longer. In this case, if the connection status management unit 33 obtains a result in which the drawn terminal image has not changed for a predetermined period of time or longer, and the malfunction detection unit 42 has determined that a malfunction has occurred in the drawing, and there are no other results indicating a malfunction in the drawing, the unit 33 determines that there is simply no change in the drawn terminal image and that no malfunction occurred in the drawing process during the terminal image generation, and continues to display the drawn terminal image on the multiple in-vehicle display terminals 50a and 50b.

[0062] Specifically, the connection status management unit 33 determines that there is simply no change in the drawing frame unless a malfunction occurs in any terminal memory 12 other than the predetermined terminal memory 12, and discards the result of the malfunction detection unit 42 which determined that a malfunction has occurred in the drawing. In this case, the multiple display control units 31a and 31b continue to display the drawn terminal image on the multiple in-vehicle display terminals 50a and 50b.

[0063] However, if a malfunction occurs in any terminal memory 12 other than the predetermined terminal memory 12, the connection status management unit 33 outputs instructions to multiple display control units 31a and 31b to switch from the drawn terminal image to the drawn in-vehicle image and display the drawn in-vehicle image on multiple in-vehicle display terminals 50a and 50b. In this case, the multiple display control units 31a and 31b switch from the drawn terminal image to the drawn in-vehicle image and display the drawn in-vehicle image on multiple in-vehicle display terminals 50a and 50b.

[0064] Furthermore, if the connection status management unit 33 obtains a result from one or more malfunction detection units 42 indicating that a malfunction has occurred in the drawing, it may notify the notification units of multiple in-vehicle display terminals 50a, 50b, sound devices, etc., installed in the vehicle 2 of the details of the malfunction. The details of the malfunction may include information such as the number of results indicating that a malfunction has occurred in the drawing being above a predetermined threshold, or information that the malfunction is caused by insufficient resources in the mobile terminal 5.

[0065] Furthermore, in this embodiment, the in-vehicle display device 3 may have the following configurations and functions.

[0066] Specifically, the malfunction detection unit 42 further detects the communication connection status between the mobile terminal 5 and the in-vehicle display device 3. Based on the presence or absence of drawing malfunctions in the terminal image generation process and the communication connection status, the in-vehicle display terminal 50 displays whether the problem is with the communication connection status between the mobile terminal 5 and the in-vehicle display device 3, or with a malfunction in the terminal image generation process (a malfunction in the terminal memory 12).

[0067] More specifically, if the mobile terminal 5 is connected to the in-vehicle display device 3 in a communication connection state, the malfunction detection unit 42, upon detecting a malfunction in the drawing process of the terminal image generation, outputs a detection result indicating a malfunction in the terminal memory 12 to the display control unit 31. The display control unit 31 then displays information indicating that a malfunction has occurred in the terminal memory 12 on the in-vehicle display terminal 50. In other words, the in-vehicle display terminal 50 displays, using the in-vehicle image, that a malfunction has occurred in the drawing process of the terminal image generation.

[0068] On the other hand, if the mobile terminal 5 is not connected to the in-vehicle display device 3 in a communication connection state, the malfunction detection unit 42 detects that a malfunction has occurred in the drawing process during the terminal image generation process and outputs a detection result indicating a malfunction in the communication connection state to the display control unit 31. Examples of situations where the mobile terminal 5 is not connected to the in-vehicle display device 3 in a communication connection state include cases where the communication between the mobile terminal 5 and the in-vehicle display device 3 is interrupted or intermittently disconnected in a wireless communication connection, or cases where the mobile terminal 5 is connected to the in-vehicle display device 3 by a communication cable or the like, but the mobile terminal 5 is not connected to the in-vehicle display device 3 in a communication connection state. The display control unit 31 causes the in-vehicle display terminal 50 to display information indicating that a malfunction has occurred in the communication connection state. In other words, the in-vehicle display terminal 50 displays an in-vehicle image indicating that there is a malfunction in the communication connection state between the mobile terminal 5 and the in-vehicle display device 3.

[0069] Furthermore, if the malfunction detection unit 42 detects a problem with the communication connection status between the mobile terminal 5 and the in-vehicle display device 3, or a problem with the drawing process in the terminal image generation process, this method can also be applied when the in-vehicle display device 3 is equipped with multiple monitoring devices 40a, 40b, and the in-vehicle device 10b has multiple first image acquisition units 11a, 11b, multiple terminal memories 12a, 12b, a second image acquisition unit 21, an in-vehicle memory 22, a connection status management unit 33, multiple display control units 31a, 31b, and multiple display memories 32a, 32b, as shown in Figure 5.

[0070] In this case, the connection status management unit 33 obtains the results of determining whether or not a malfunction has occurred from multiple monitoring devices 40a and 40b, and based on the obtained results, it can determine whether the malfunction is in the communication connection status between the mobile terminal 5 and the in-vehicle display device 3, or in the drawing process of the terminal image generation process. For example, if the number of results indicating that a drawing malfunction has occurred is less than a predetermined threshold (around a few), the connection status management unit 33 may determine that the malfunction is in the drawing process of the terminal image generation process. Alternatively, if the connection status management unit 33 obtains results indicating that a drawing malfunction has occurred from all monitoring devices 40, it may determine that the malfunction is in the communication connection status between the mobile terminal 5 and the in-vehicle display device 3.

[0071] <Example of operation 1> Next, with reference to Figure 6, we will describe example 1 of the operation of the display control system 1.

[0072] Figure 6 is a sequence diagram showing example 1 of the operation of the display control system 1. Figure 6 assumes a scenario where a malfunction occurs in the terminal image during display due to some reason, such as a communication interruption.

[0073] First, when the in-vehicle display device 3 is connected to the mobile terminal 5 in a communication manner, the first image acquisition unit 11 of the in-vehicle device 10 acquires a terminal image from the mobile terminal 5 (S11).

[0074] Next, the terminal memory 12 acquires a terminal image from the first image acquisition unit 11, stores the acquired terminal image in a format that can be displayed on the in-vehicle display terminal 50, and outputs the stored terminal image to the display control unit 31 and the monitoring device 40 (S12).

[0075] Next, the monitoring device 40 outputs the result of detecting a malfunction in the terminal memory 12 (information indicating the occurrence of a drawing malfunction) to the display control unit 31 (S13).

[0076] Next, the second image acquisition unit 21 of the in-vehicle device 10 acquires the drawn in-vehicle image (S14).

[0077] Next, the in-vehicle memory 22 acquires an in-vehicle image from the second image acquisition unit 21 and draws the acquired in-vehicle image in a format that can be displayed on the in-vehicle display terminal 50 (S15). The in-vehicle memory 22 outputs the stored in-vehicle image to the display control unit 31.

[0078] Steps S14 and S15 may be performed before steps S11 and S12.

[0079] Next, since the monitoring device 40 has detected a problem with the drawing, the display control unit 31 switches from the drawn terminal image to the drawn in-vehicle image (S16) and displays the drawn in-vehicle image on the in-vehicle display terminal 50. In other words, the display control unit 31 outputs the drawn in-vehicle image to the in-vehicle display terminal 50 via the display memory 32.

[0080] Next, the in-vehicle display terminal 50 displays the drawn in-vehicle image (S17).

[0081] Then, the processing of the sequence diagram in Figure 6 is terminated.

[0082] <Example of operation 2> Next, with reference to Figure 7, we will describe example 2 of the operation of the display control system 1.

[0083] Figure 7 is a sequence diagram showing Operation Example 2 of the display control system 1. Operation Example 2 in Figure 7 assumes that no drawing malfunction occurs and shows an example of operation when the mobile terminal 5 changes from a state where it is not connected to the in-vehicle display device 3 for communication to a state where it is connected to the in-vehicle display device 3 for communication.

[0084] First, if the mobile terminal 5 is not connected to the in-vehicle display device 3 in a communication manner, the application unit 23 starts the first application (S21).

[0085] Next, when the mobile terminal 5 is connected to the in-vehicle display device 3 in a communicative manner, the display control unit 31 switches the display from the drawn in-vehicle image to the drawn terminal image (S22), and displays the drawn terminal image on the in-vehicle display terminal 50. In other words, the display control unit 31 outputs the terminal image to the in-vehicle display terminal 50 via the display memory 32.

[0086] Next, the in-vehicle display terminal 50 displays the drawn terminal image (S23).

[0087] Next, the application unit 23 stops the first application and starts the second application (S24). This is because the second application has less information, and it is preferable to stop the first application, which has more information. If the second application, which uses fewer resources than the first application, is started in the background, it is expected that even if a problem occurs in rendering the terminal image, it will be possible to immediately switch from the terminal image to the second in-vehicle image of the second application, and resource consumption during the period when the display of the second application is waiting can be suppressed.

[0088] Next, the application unit 23 starts the second application, draws the second in-vehicle image via the in-vehicle memory 22 in a format that can be displayed on the in-vehicle display terminal 50, and outputs the drawn second in-vehicle image to the display control unit 31 (S25). At this time, the display control unit 31 does not output the second in-vehicle image held in the in-vehicle memory 22 to the in-vehicle display terminal 50 due to the start of the second application.

[0089] Therefore, if no malfunction occurs in the terminal image generation process in the terminal memory 12, the display control unit 31 continues to display the drawn terminal image on the in-vehicle display terminal 50 and puts the display of the second in-vehicle image drawn based on the second application into a standby state.

[0090] Then, the processing shown in the sequence diagram in Figure 7 is terminated.

[0091] <Example of operation 3> Next, with reference to Figure 8, we will describe example 3 of the operation of the display control system 1.

[0092] Figure 8 is a sequence diagram showing Operation Example 3 of the display control system 1. Operation Example 3 in Figure 8 shows an example of operation that occurs when a drawing problem occurs after Operation Example 2 shown in Figure 7.

[0093] First, if a drawing malfunction occurs, the process shown in Operation Example 1 of Figure 6 (S11-S13) is executed. When the malfunction detection unit 42 detects a drawing malfunction, as shown in step S25 of Figure 7, the second application has already been started, so the display control unit 31 switches from the drawn terminal image to the drawn second in-vehicle image (S31) and displays the drawn second in-vehicle image on the in-vehicle display terminal 50 (S32). Since the second in-vehicle image contains less information, it is preferable to display the first in-vehicle image, which contains more information, on the in-vehicle display terminal 50. For this reason, the second in-vehicle image is displayed on the in-vehicle display terminal 50 only for the period until the drawn first in-vehicle image can be displayed on the in-vehicle display terminal 50.

[0094] Next, in order to display the drawn first in-vehicle image on the in-vehicle display terminal 50, the application unit 23 starts the first application (S33).

[0095] Note that the order of steps S31, S32, and S33 may be reversed, or they may be performed simultaneously.

[0096] Next, after the startup of the first application is complete, the display control unit 31 switches from the second in-vehicle image held in the in-vehicle memory 22 to the first in-vehicle image held in the in-vehicle memory 22 (S34). The display control unit 31 displays the first in-vehicle image drawn on the in-vehicle display terminal 50 (S35). As a result, the in-vehicle display terminal 50 can display the first in-vehicle image, which contains a large amount of information.

[0097] Next, the application unit 23 stops the second application (S36).

[0098] Then, the processing of the sequence diagram in Figure 8 is terminated.

[0099] <Effects and Effects> Next, the effects of the in-vehicle display device 3, the in-vehicle display method, and the program according to this embodiment will be described.

[0100] As described above, the in-vehicle display device 3 according to Technology 1 of this embodiment is an in-vehicle display device 3 that displays on an in-vehicle display terminal 50 mounted on a vehicle 2 either an on-vehicle image of on-vehicle equipment 10, 10a, 10b, 10c mounted on a vehicle 2, or a terminal image of a mobile terminal 5 held by a passenger riding in the vehicle 2. The in-vehicle display device 3 comprises a first image acquisition unit 11 that acquires a terminal image from the mobile terminal 5, a second image acquisition unit 21 that acquires on-vehicle images from on-vehicle equipment 10, 10a, 10b, 10c, a malfunction detection unit 42 that detects drawing malfunctions in the terminal image generation process, and a display control unit 31 that, when the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process, switches from the terminal image to an on-vehicle image and displays the on-vehicle image on the in-vehicle display terminal 50.

[0101] According to this, since the malfunction detection unit 42 detects a malfunction in the drawing process, even if, for example, the mobile terminal 5 loses communication with an external base station or a malfunction occurs when drawing the terminal image, it can switch from the terminal image to the in-vehicle image and display the switched in-vehicle image on the in-vehicle display terminal 50.

[0102] Therefore, with this in-vehicle display device 3, even if there is a malfunction in the display of information provided to the passenger from the mobile terminal 5 via the vehicle display terminal 50, the information can be displayed appropriately.

[0103] Furthermore, the in-vehicle display device 3 according to Technology 2 of this embodiment is the in-vehicle display device 3 described in Technology 1. In this case, the in-vehicle image includes a first in-vehicle image and a second in-vehicle image, and the in-vehicle display device 3 has an application unit 23 that launches a first application for displaying the first in-vehicle image and a second application for displaying the second in-vehicle image which has less information than the first in-vehicle image, and if the mobile terminal 5 is not connected to the in-vehicle display device 3 in a communicative manner, the application unit 23 launches the first application.

[0104] According to this, if the mobile terminal 5 is not connected to the in-vehicle display device 3, the first application can be launched to present the passenger with a high-performance (more information-rich) first in-vehicle image than the second in-vehicle image.

[0105] Furthermore, the in-vehicle display device 3 according to Technology 3 of this embodiment is the in-vehicle display device 3 described in Technology 2. In this case, when the mobile terminal 5 is connected to the in-vehicle display device 3 in a communicative manner, the application unit 23 stops the first application and starts the second application, and the display control unit 31 switches the display from the in-vehicle image to the terminal image.

[0106] According to this, when the mobile terminal 5 is connected to the in-vehicle display device 3 in a communicative manner, the terminal image can be displayed on the in-vehicle display terminal 50. Furthermore, since the first application, which has a large amount of information, can be stopped and the second application, which has less information, can be started and put into standby mode, the increase in resources on the in-vehicle display device 3 can be suppressed compared to when the first application is started and put into standby mode.

[0107] Furthermore, by running a second application, which requires fewer resources than the first application, in the background, even if a problem occurs in rendering the terminal image, it is possible to immediately switch from the terminal image to the second in-vehicle image of the second application. Therefore, even if a problem occurs in displaying the information provided to the passenger from the mobile terminal 5 via the vehicle display terminal 50, the information can be displayed immediately, allowing information to continue to be presented to the passenger and preventing a decrease in the safety of the moving vehicle 2.

[0108] Furthermore, the in-vehicle display device 3 according to Technology 4 of this embodiment is the in-vehicle display device 3 described in Technology 3. In this case, after the second application is started, if the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process, the display control unit 31 switches from the terminal image to the second in-vehicle image and displays the second in-vehicle image on the in-vehicle display terminal 50. At this time, the application unit 23 starts the first application, and after the startup of the first application is completed, the display control unit 31 switches from the second in-vehicle image to the first in-vehicle image, and the application unit 23 stops the second application.

[0109] According to this system, if a rendering problem is detected, the system can switch from the terminal image to a second in-vehicle image from a pre-launched second application, allowing for immediate display of information.

[0110] Furthermore, the display control unit 31 initiates the startup of the first application, but even during the short period until the startup of the first application is complete, it can display the second in-vehicle image on the in-vehicle display terminal 50. Therefore, even if a problem occurs with the display, the necessary information can continue to be presented to the passenger.

[0111] Furthermore, since the first application can be launched and then switched from the second in-vehicle image to the first in-vehicle image after the first application has launched, the display period of the second in-vehicle image, which contains less information, can be kept as short as possible. This allows for the information to be displayed appropriately.

[0112] Furthermore, by stopping the second application, which is no longer needed after switching to the first in-vehicle image, it is possible to suppress the increase in resources used by in-vehicle devices 10, 10a, 10b, and 10c.

[0113] Furthermore, the in-vehicle display device 3 according to Technology 5 of this embodiment is the in-vehicle display device 3 described in any one of Technologies 2 to 4. In this case, the malfunction detection unit 42 further detects the communication connection status between the mobile terminal 5 and the in-vehicle display device 3, and the in-vehicle display terminal 50 displays whether the problem is with the communication connection status between the mobile terminal 5 and the in-vehicle display device 3 or with the drawing status in the terminal image generation process, based on the presence or absence of a drawing malfunction in the terminal image generation process and the communication connection status.

[0114] This allows for notification of whether the problem is related to the communication connection or a rendering issue in the terminal image generation process, thus informing passengers which type of problem they are experiencing. By understanding the nature of the problem, passengers can then take appropriate action to resolve it.

[0115] Furthermore, the in-vehicle display device 3 according to Technology 6 of this embodiment is the in-vehicle display device 3 described in any one of Technologies 1 to 5. In this case, the in-vehicle display device 3 has a plurality of fault detection units 42 (fault detection units 42 of a plurality of monitoring devices 40a, 40b), and includes a connection status management unit 33 that manages whether to display a terminal image or an in-vehicle image on a plurality of in-vehicle display terminals 50a, 50b based on the results output by the plurality of fault detection units 42 (fault detection units 42 of a plurality of monitoring devices 40a, 40b).

[0116] According to this, the connection status management unit 33 can decide whether to continue with the terminal image or switch from the terminal image to the in-vehicle image, for example, by taking into account the results output by multiple monitoring devices 40a and 40b. This makes it possible to increase the reliability of determining whether or not a problem occurred in the rendering process during the generation of the terminal image.

[0117] Furthermore, the in-vehicle display device 3 according to Technology 7 of this embodiment is the in-vehicle display device 3 described in Technology 6. In this case, if the connection status management unit 33 obtains a result in which the displayed terminal image has not changed for a predetermined period of time and the malfunction detection unit 42 (the malfunction detection unit 42 of the multiple monitoring devices 40a, 40b) has determined that a malfunction has occurred in the display, and there are no other results indicating a malfunction in the display, the unit 33 determines that there has simply been no change in the displayed terminal image and that no malfunction has occurred in the display process of the terminal image, and continues to display the terminal image on the multiple in-vehicle display terminals 50a, 50b.

[0118] According to this, even if multiple monitoring devices 40a and 40b mistakenly determine that a problem has occurred in the drawing process because the drawn terminal image has not changed for a long period of time, the connection status management unit 33 can determine that no problem has occurred in the drawing process if there are no other results indicating a drawing problem. Therefore, the reliability of determining whether or not a problem has occurred in the drawing process during the terminal image generation process can be increased.

[0119] Furthermore, the in-vehicle display device 3 according to Technology 8 of this embodiment is the in-vehicle display device 3 described in Technology 6 or 7. In this case, the connection status management unit 33, when the number of results indicating that a drawing malfunction has occurred among the results output by the multiple malfunction detection units 42 (malfunction detection units 42 of the multiple monitoring devices 40a, 40b) exceeds a predetermined threshold, causes the multiple display control units 31a, 31b to switch from terminal images to in-vehicle images and display the in-vehicle images on the multiple in-vehicle display terminals 50a, 50b.

[0120] According to this, if the number of results indicating a drawing malfunction exceeds a predetermined threshold, it is considered that a malfunction has occurred during all drawing processes, or that there is a high probability of malfunctions occurring in the future. Therefore, all terminal images can be switched to in-vehicle images and displayed on the in-vehicle display terminals 50a and 50b. As a result, the in-vehicle display device 3 can display information appropriately.

[0121] Furthermore, the in-vehicle display device 3 according to Technology 9 of this embodiment is the in-vehicle display device 3 described in any one of Technologies 6 to 8. In this case, when the connection status management unit 33 obtains a result from one or more malfunction detection units 42 indicating that a malfunction has occurred in the drawing, it notifies the notification unit (in-vehicle display terminals 50a, 50b, etc.) installed in the vehicle 2 of the details of the malfunction that occurred.

[0122] According to this system, the nature of any malfunctions that occur can be reported, allowing passengers to understand the nature of the malfunction and take action to resolve it.

[0123] Furthermore, the in-vehicle display method according to the technology 10 of this embodiment is an in-vehicle display method that displays either an in-vehicle image of in-vehicle equipment 10, 10a, 10b, 10c mounted in the vehicle 2, or a terminal image of a mobile terminal 5 held by a passenger riding in the vehicle 2, on an in-vehicle display terminal 50 mounted in the vehicle 2, and includes the first image acquisition unit 11 acquiring a terminal image from the mobile terminal 5, the second image acquisition unit 21 acquiring an in-vehicle image from the in-vehicle equipment 10, 10a, 10b, 10c, the malfunction detection unit 42 detecting a drawing malfunction in the terminal image generation process, and when the malfunction detection unit 42 detects a drawing malfunction in the terminal image generation process, it switches from the terminal image to an in-vehicle image, and the display control unit 31 displays the in-vehicle image on the in-vehicle display terminal 50.

[0124] This method also produces the same effects as described above.

[0125] Furthermore, the program relating to technology 11 of this embodiment is a program for a computer to execute the in-vehicle display method of technology 10.

[0126] This method also produces the same effects as described above.

[0127] (Other variations) The in-vehicle display device, in-vehicle display method, and program relating to this disclosure have been described above based on the embodiments described above. However, this disclosure is not limited to these embodiments. Various modifications to the embodiments that a person skilled in the art could conceive of may also be included in the scope of this disclosure, as long as they do not deviate from the spirit of this disclosure.

[0128] For example, the display control system 1 according to the above embodiment may have the configuration shown in Figure 9. Figure 9 is yet another block diagram showing a display control system 1 according to another modification. As shown in Figure 9, the multiple first image acquisition units 11a, 11b and the multiple terminal memories 12a, 12b do not have to be mounted on the in-vehicle device 10c. In this case, the multiple first image acquisition units 11a, 11b and the multiple terminal memories 12a, 12b may be mounted on a mobile terminal, or they may be separate and independent from the mobile terminal 5.

[0129] Furthermore, each component of the in-vehicle equipment and monitoring equipment included in the in-vehicle display device according to the above embodiment is typically realized as an LSI, which is an integrated circuit. These may be individually integrated into a single chip, or some or all of them may be integrated into a single chip.

[0130] Furthermore, integrated circuit implementation is not limited to LSIs; it may also be achieved using dedicated circuits or general-purpose processors. Field-Programmable Gate Arrays (FPGAs), which can be programmed after LSI manufacturing, or reconfigurable processors, which allow for the reconfiguration of the connections and settings of circuit cells within the LSI, may also be used.

[0131] In each of the above embodiments, each component may be implemented by dedicated hardware or by executing a software program suitable for each component. Each component may also be implemented by a program execution unit such as a CPU or processor reading and executing a software program recorded on a storage medium such as a hard disk or semiconductor memory.

[0132] Furthermore, all figures used above are illustrative to illustrate the present disclosure, and the embodiments of this disclosure are not limited to the figures exemplified.

[0133] Furthermore, the division of functional blocks in the block diagram is just one example; multiple functional blocks can be implemented as a single functional block, a single functional block can be divided into multiple parts, or some functions can be moved to other functional blocks. In addition, the functions of multiple functional blocks with similar functions can be processed in parallel or time-sharing by a single piece of hardware or software.

[0134] Furthermore, the order in which each step in the flowchart is performed is illustrative for the purpose of specifically illustrating this disclosure, and may be in a different order. Also, some of the above steps may be performed simultaneously (in parallel) with other steps.

[0135] Furthermore, this disclosure also includes forms obtained by applying various modifications to the above embodiments that a person skilled in the art could conceive, and forms realized by arbitrarily combining the components and functions of the embodiments without departing from the spirit of this disclosure. [Industrial applicability]

[0136] The in-vehicle display device, in-vehicle display method, and program of this disclosure can be used, for example, in vehicles equipped with one or more display devices, other devices and systems other than vehicles. [Explanation of Symbols]

[0137] 2 vehicles 3 Automotive display device 5 Mobile devices 10, 10a, 10b, 10c automotive equipment 11, 11a, 11b 1st image acquisition section 21 Second Image Acquisition Unit 23. Application Department 31, 31a, 31b Display control unit 33 Connection Status Management Unit 42. Defect detection unit 50, 50a, 50b In-vehicle display terminal (notification unit)

Claims

1. An in-vehicle display device that displays either an in-vehicle image from an in-vehicle device installed in the vehicle, or a terminal image from a mobile terminal held by a passenger in the vehicle, on an in-vehicle display terminal installed in the vehicle, A first image acquisition unit that acquires the terminal image from the mobile terminal, A second image acquisition unit that acquires the in-vehicle image from the in-vehicle equipment, A defect detection unit that detects drawing defects in the terminal image generation process, The system includes a display control unit that, when the malfunction detection unit detects a malfunction in the rendering process of the terminal image, switches from the terminal image to the in-vehicle image and displays the in-vehicle image on the in-vehicle display terminal. Automotive display device.

2. The aforementioned in-vehicle image includes a first in-vehicle image and a second in-vehicle image. The in-vehicle display device has an application unit that launches a first application for displaying the first in-vehicle image and a second application for displaying the second in-vehicle image which contains less information than the first in-vehicle image. If the mobile terminal is not connected to the in-vehicle display device in a communication-enabled manner, the application unit starts the first application. The in-vehicle display device according to claim 1.

3. When the aforementioned mobile terminal is connected to the in-vehicle display device in a manner that enables communication, The application unit stops the first application and starts the second application. The display control unit switches the display from the in-vehicle image to the terminal image. The in-vehicle display device according to claim 2.

4. If, after the second application is launched, the malfunction detection unit detects a drawing malfunction in the terminal image generation process, the display control unit switches from the terminal image to the second in-vehicle image and displays the second in-vehicle image on the in-vehicle display terminal, The application unit starts the first application, The display control unit switches from the second in-vehicle image to the first in-vehicle image after the first application has finished starting up. The application unit stops the second application. The in-vehicle display device according to claim 3.

5. The malfunction detection unit further detects the communication connection status between the mobile terminal and the in-vehicle display device, The in-vehicle display terminal displays, based on whether or not there is a drawing defect in the terminal image generation process and the communication connection status, whether or not there is a problem with the communication connection status between the mobile terminal and the in-vehicle display device, or whether or not there is a drawing defect in the terminal image generation process. An in-vehicle display device according to any one of claims 2 to 4.

6. The in-vehicle display device has a plurality of the malfunction detection units, The system includes a connection status management unit that manages whether to display the terminal image or the in-vehicle image on multiple in-vehicle display terminals based on the results output by multiple malfunction detection units. An in-vehicle display device according to any one of claims 1 to 4.

7. If the connection status management unit obtains a result indicating that there has been no change in the drawn terminal image for a predetermined period of time, and the malfunction detection unit has determined that a malfunction has occurred in the drawing, and there are no other results indicating a malfunction in the drawing, the unit determines that there has simply been no change in the drawn terminal image and that no malfunction has occurred in the drawing process of the terminal image, and continues to display the terminal image on the multiple in-vehicle display terminals. The in-vehicle display device according to claim 6.

8. The connection status management unit, when the number of results output by the multiple fault detection units indicating that a drawing fault has occurred exceeds a predetermined threshold, instructs the multiple display control units to switch from the terminal image to the in-vehicle image and display the in-vehicle image on the multiple in-vehicle display terminals. The in-vehicle display device according to claim 6.

9. When the connection status management unit receives a result indicating that a drawing malfunction has occurred from one or more of the malfunction detection units, it causes the notification unit installed in the vehicle to notify the notification unit of the details of the malfunction that occurred. The in-vehicle display device according to claim 6.

10. An in-vehicle display method for displaying either an in-vehicle image from an in-vehicle device installed in the vehicle, or a terminal image from a mobile device held by a passenger in the vehicle, on an in-vehicle display terminal installed in the vehicle, The first image acquisition unit acquires the terminal image from the aforementioned mobile terminal, The second image acquisition unit acquires the in-vehicle image from the in-vehicle equipment, The defect detection unit detects a drawing defect in the terminal image generation process, When the malfunction detection unit detects a drawing malfunction in the terminal image generation process, it switches from the terminal image to the in-vehicle image, and the display control unit displays the in-vehicle image on the in-vehicle display terminal. Automotive display method.

11. For a computer to execute the in-vehicle display method of claim 10 program.

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