Vehicle display device

Abstract

A display device for a vehicle is provided that can more reliably prevent malfunctions from occurring. [Solution] A vehicle display device 10 includes a screen 11a that displays images Dn and Da, a capacitive contact sensor 14 that detects whether or not a touch operation is performed on the screen 11a and the coordinates of the touch operation location, and a control unit 15 that displays the images Dn and Da on the screen 11a and divides the screen 11a into an active area that accepts touch operations and an inactive area that does not accept touch operations. The control unit 15 includes a water presence determination unit 15b that determines whether or not water is attached to the screen 11a based on the detection result of the contact sensor 14. When the water presence determination unit 15b determines that no water is attached to the screen 11a, the control unit 15 sets the inactive area above the active area, and when it determines that water is attached to the screen 11a, the control unit 15 sets the inactive area below the active area in the direction of gravity.

Description

[Technical Field]

[0001] The present disclosure relates to a display device for a vehicle. [Background technology]

[0002] The input device described in Patent Document 1 is equipped with a malfunction determination unit that determines whether a malfunction has occurred due to water droplets or the like adhering to the touch panel using touch input coordinates, the direction of movement of the coordinates, information on the downward direction of the device, and malfunction position information, and can prevent operation buttons located at the edge of the display screen from being erroneously operated due to water droplets or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-81666 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, depending on the movement of water droplets or water flow on the screen, the malfunction determination unit may not be able to correctly determine a malfunction, and a malfunction may still occur.

[0005] The present disclosure has been made in consideration of the above-described circumstances, and has an object to provide a vehicle display device that can more reliably suppress the occurrence of malfunctions. [Means for solving the problem]

[0006] In order to achieve the above object, the vehicle display device according to the present disclosure includes: a screen for displaying an image; a capacitive touch sensor that detects whether or not a touch operation is performed on the screen and the coordinates of the position of the touch operation; a control unit that displays an image on the screen and divides the screen into an active area that accepts the touch operation and an inactive area that does not accept the touch operation; The control unit a water presence determination unit that determines whether water is attached to the screen based on the detection result of the contact sensor; When the water presence / absence determining unit determines that no water is attached to the screen, the inactive area is set above the active area, and when the water presence / absence determining unit determines that water is attached to the screen, the inactive area is set below the active area in the direction of gravity. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to more reliably suppress the occurrence of malfunctions. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram of a vehicle according to an embodiment of the present disclosure. [Figure 2] FIG. 10 is a schematic diagram of an image displayed on the screen in a water non-detection mode according to an embodiment of the present disclosure. [Figure 3] FIG. 10 is a schematic diagram of an image displayed on the screen in a water detection mode according to an embodiment of the present disclosure. [Figure 4] 10 is a flowchart of an image display process according to an embodiment of the present disclosure. [Figure 5] FIG. 10 is a schematic diagram of an image displayed on the screen in a water detection mode according to a modified example of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] A vehicle equipped with a vehicle display device according to an embodiment of the present disclosure will be described with reference to the drawings. As shown in Fig. 1, the vehicle 5 includes a vehicle display device 10 and an on-board device 6. The vehicle 5 is a work vehicle such as a backhoe. The on-board device 6 is a device mounted on the vehicle 5 in addition to the vehicle display device 10. The on-board device 6 includes an on-board camera 6a and an on-board ECU (Electronic Control Unit) 6b.

[0010] The vehicle display device 10 displays images Dn and Da including vehicle information on a screen 11a. The vehicle display device 10 includes a display unit 11, a contact sensor 14, and a control unit 15.

[0011] The display unit 11 displays images Dn and Da on a screen 11a under the control of the control unit 15. The display unit 11 includes a TFT (Thin Film Transistor) liquid crystal display panel and a light source that illuminates the liquid crystal display panel, neither of which is shown. 2 and 3, the X and Y directions are set perpendicular to each other on the screen 11a, with the X direction being the left-right direction as seen by a viewer of the screen 11a, and the Y direction being the up-down direction as seen by a viewer of the screen 11a. The direction of gravity Gd points downward in the Y direction. The display unit 11 is not limited to a type having a liquid crystal display panel, but may be a type having an organic EL display.

[0012] The contact sensor 14 detects the coordinates of the position where a contact object C (see FIG. 2), such as a driver's finger or a water droplet, touches the screen 11a, and outputs the detection result to the control unit 15. The contact sensor 14 is, for example, a capacitance type touch sensor.

[0013] The control unit 15 controls the display unit 11. The control unit 15 includes a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a touch panel IC (Integrated Circuit), etc. The control unit 15 receives vehicle information (warning information, shift position information, remaining battery capacity information, remaining fuel information, vehicle speed information, work equipment status information, etc.) from the on-board ECU 6b and displays images Dn and Da including the vehicle information on the screen 11a.

[0014] As shown in FIG. 1, the control unit 15 includes a display control unit 15a that displays images Dn and Da on the screen 11a, and a water presence / absence determination unit 15b that determines whether water is present on the screen 11a. The vehicle display device 10 is configured as a single unit, and a control unit 15 is built into a case (not shown). It should be noted that, without being limited to this example, the control unit 15 may be provided at a position separate from the unit including the display unit 11 and the contact sensor 14. In this case, the control unit 15 may be configured as a part of the in-vehicle ECU 6b.

[0015] 2, the water presence determining unit 15b acquires coordinate movement information by monitoring the coordinates of the position where the contacting object C contacts the screen 11a, and determines whether water is present on the screen 11a based on the acquired coordinate movement information. This coordinate movement information includes movement directions E1 to E3 of the contacting object C on the screen 11a. If the movement direction E1 of the contacting object C included in the coordinate movement information is the gravity direction Gd and there is no reversal of the movement direction E1, the water presence determination unit 15b determines that the contacting object C is water and that water is present on the screen 11a. Based on this determination, the control unit 15 enters the water detection mode.

[0016] On the other hand, if the movement direction E2 of the contacting object C included in this coordinate movement information is other than the gravity direction Gd (for example, upward), or if the movement direction E3 is reversed, the water presence determination unit 15b determines that the contacting object C is a finger and that there is no water on the screen 11a. Based on this determination, the control unit 15 enters the water non-detection mode. The reversal of the movement direction E3 is a movement unique to fingers, in which the contact object C moves in a predetermined direction (e.g., downward) and then reverses to a direction opposite to the predetermined direction (e.g., upward), and is a movement not seen in water droplets.

[0017] 2 and 3, the control unit 15 divides the screen 11a into an active area A and an inactive area N. The active area A is an area that accepts touch operations on the screen 11a, and the inactive area N is an area that does not accept touch operations on the screen 11a and disables touch operations.

[0018] The display control unit 15a displays a plurality of display contents B2 in the active area A and a plurality of display contents B1 in the inactive area N as images Dn and Da. The plurality of display contents B1 are vehicle information that cannot be switched by the viewer's touch operation on the screen 11a or by operating an in-vehicle switch (not shown), and are always displayed when the power of the vehicular display device 10 is turned on, except when images related to the opening and ending are displayed. The plurality of display contents B1 are, for example, indicators (warning lights, parking, remaining battery level, remaining fuel, vehicle speed, and display of the status of work equipment), icons indicating vehicle speed modes (high speed mode or low speed mode), etc. The display position of the display content B1 is fixed, and the vehicle status is indicated by turning on or off the display content B1 (indicator or icon). The plurality of display contents B2 can be switched by a touch operation (including a swipe operation) by the viewer, and for example, an outside image of the vehicle captured by the vehicle-mounted camera 6a, work information, or the like is displayed.

[0019] When the control unit 15 determines that a touch operation (including a swipe operation) has been performed within the active area A based on the detection result of the contact sensor 14, it switches the contents of the plurality of display contents B2 according to the operation content. On the other hand, when the control unit 15 determines based on the detection result of the contact sensor 14 that a touch operation (including a swipe operation) has been performed within the inactive area N, it invalidates this operation and does not switch the display contents of the images Dn and Da.

[0020] The active area A and the inactive area N each have a rectangular shape that is long in the X direction, and the screen 11a is partitioned so that they are lined up in the Y direction via a boundary line BL that extends in the X direction. The size of the active area A in the Y direction is set larger than the size of the inactive area N in the Y direction. The size of the inactive area N in the Y direction is set to 1 / 3 to 1 / 5, for example 1 / 4, of the size of the active area A in the Y direction.

[0021] 2, in the image Dn in the water no detection mode, the active area A is located below the inactive area N. Since it is easier to perform touch operations at the bottom of the screen 11a than at the top, by setting the active area A at the bottom of the screen 11a, touch operations are easier in the image Dn in the water no detection mode. 3, in the image Da in the water detection mode, the active area A is located above the inactive area N. Here, the lower part of the screen 11a is an area that water droplets or water flows attached to the screen 11a are likely to reach due to gravity, and therefore erroneous detection of a touch operation is likely to occur. In this regard, in the image Da in the water detection mode, by setting the inactive area N at the lower part of the screen 11a, it is possible to prevent erroneous detection of a touch operation due to water droplets or water flows.

[0022] The display control unit 15a changes the display mode (e.g., color and / or brightness) of the inactive area N in the water detection mode compared to the display mode of the inactive area N in the water non-detection mode. For example, the background color of the inactive area N in the water non-detection mode is set to white or black, and the background color of the inactive area N in the water detection mode is set to gray, i.e., grayed out. Any method can be used as long as the display format changes between the non-water detection mode and the water detection mode, and the presence or absence of an outer frame for the inactive area N, the brightness of the display content B1, the arrangement or icons of the display content B1 may change between the non-water detection mode and the water detection mode.

[0023] Next, an image display process executed by the control unit 15 will be described with reference to the flowchart of Fig. 4. This image display process is repeatedly executed while power is being supplied to the vehicle display device 10.

[0024] First, the water presence determining unit 15b acquires coordinate movement information as described above (step S101), and determines whether water exists on the screen 11a based on the acquired coordinate movement information (step S102).

[0025] When the water presence determination unit 15b determines that there is no water on the screen 11a (step S102; NO), the control unit 15 transitions to a water non-detection mode, displays the image Dn shown in FIG. 2 (step S103), and terminates the image display process.

[0026] When the water presence determination unit 15b determines that water is present on the screen 11a (step S102; YES), the control unit 15 transitions to water detection mode, displays image Da shown in FIG. 3 (step S104), and terminates the image display process. As shown in Fig. 2, when a contact object C, which is a water droplet or a water flow, moves in a movement direction E1, which is the direction of gravity Gd, the presence of water is determined (step S102; YES), and the image Da shown in Fig. 3 is displayed. Therefore, even if the contact object C, which is a water droplet or a water flow, reaches the display content B1 in the inactive area N, as shown in position P in Fig. 3, it is not recognized as a touch operation. Therefore, malfunctions due to water are suppressed.

[0027] (effect) According to the embodiment described above, the following effects are achieved. (1) The vehicle display device 10 includes a screen 11a that displays images Dn and Da, a capacitance-type contact sensor 14 that detects whether or not a touch operation is performed on the screen 11a and the coordinates of the touch operation position, and a control unit 15 that displays the images Dn and Da on the screen 11a and divides the screen 11a into an active area A that accepts touch operations and an inactive area N that does not accept touch operations. The control unit 15 includes a water presence determination unit 15b that determines whether or not water (water droplets or water flow) is attached to the screen 11a based on the detection result of the contact sensor 14. When the water presence determination unit 15b determines that no water is attached to the screen 11a, the control unit 15 sets the inactive area N above the active area A, and when the water presence determination unit 15b determines that water is attached to the screen 11a, the control unit 15 sets the inactive area N below the active area A in the direction of gravity Gd. According to this configuration, when it is determined that there is water, an inactive area N is set at the bottom of the screen 11a, where false detection is likely to occur. Therefore, even if water enters the inactive area N due to gravity, it is not determined to be a touch operation, and false detection can be more reliably prevented.

[0028] (2) The control unit 15 displays information in which the display content can be switched by a touch operation in the active area A of the screen 11a, and displays information in which the display content cannot be switched by a touch operation in the inactive area N of the screen 11a. According to this configuration, display content that does not require a touch operation is displayed in the inactive area N, so that even if touch operations cannot be performed in the inactive area N, convenience is unlikely to decrease.

[0029] (3) The control unit 15 changes the display mode (color and / or brightness) of the inactive area N depending on whether it is determined that there is water or that there is no water. This configuration allows the viewer to easily recognize that the absence of water has been detected and the position of the inactive area N has changed.

[0030] (4) The vehicle display device 10 is mounted on the vehicle 5, which is a work vehicle, so that it cannot be taken out. According to this configuration, since the vehicle display device 10 is mounted on a work vehicle that is likely to be splashed with water such as rainwater or drinking water, it is particularly beneficial to change the position of the inactive area N when it is determined that water is present, as described above.

[0031] The present disclosure is not limited to the above-described embodiments and drawings. Modifications (including deletion of components) may be made as appropriate within the scope of the present disclosure. An example of such a modification is described below.

[0032] (Variation) In the above embodiment, the Y-direction size of the active area A was set larger than the Y-direction size of the inactive area N, but this is not limited to this, and the active area A may be set smaller than the Y-direction size of the inactive area N, or may be the same as the Y-direction size of the inactive area N.

[0033] In the above embodiment, the shape of the inactive area N in the water detection mode can be changed as appropriate. For example, as shown in FIG. 5, the inactive area N' may be a rectangular frame surrounding the active area A on the outer periphery of the screen 11a. The multiple display contents B1 may be provided only on the bottom side H1 of the inactive area N', or on the top side H2, right side H3, or left side H4 of the inactive area N' other than the bottom side H1. In this case, the image in the active area A may be smaller than the image in the active area A in the water non-detection mode. The inactive area may also be L-shaped and surround three sides of the rectangular active area.

[0034] The determination conditions of the water presence determination unit 15b are not limited to the movement direction of the coordinates and whether or not the movement direction is reversed, and conditions may be omitted or added as appropriate. For example, the contact area and contact surface shape of the contacting object C may be added to the determination conditions of the water presence determination unit 15b. Furthermore, the water presence determination unit 15b may make a determination by taking into account not only the detection result of the contact sensor 14, but also the detection result of a raindrop detection sensor that detects rainfall, and / or the detection result of behavior sensors (acceleration sensor and angular velocity sensor) installed in the vehicle 5.

[0035] In the above embodiment, the vehicular display device 10 is mounted on the vehicle 5, but may be connected to the vehicle 5 via wireless communication and configured to be portable from the vehicle 5. In this case, the vehicular display device 10 may include a gravity sensor that detects the direction of gravity of the vehicular display device 10, and the control unit 15 may determine whether water is present on the screen 11a based on the direction of gravity detected by the gravity sensor and the movement directions E1 to E3 of the contact object C. Furthermore, the vehicle display device 10 may be mounted on or connected to a vehicle 5 other than a work vehicle, for example, a two-wheeled vehicle or a four-wheeled vehicle. In the above embodiment, the touch operation may be performed with a touch pen or the like in addition to a finger.

[0036] In the above embodiment, the display content B1 is an indicator or an icon indicating the vehicle status, and the display content B2 is information that can switch the display content. However, the information represented by the display content B2 may include information that indicates the vehicle status. For example, the vehicle status indicated by display content B2 may include a dial-type or digital display of vehicle speed or tachometer, setting information of on-board devices and the vehicle, vehicle status information that is less important or requires detailed description (so-called secondary vehicle information), etc. However, in this case, since the information displayed in display content B2 can be switched, it is preferable that display content B1 display information that is relatively important to keep track of at all times (such as warnings by indicators). [Explanation of symbols]

[0037] 5...Vehicle 6...In-vehicle device, 6a...In-vehicle camera, 6b...In-vehicle ECU 10...Vehicle display device 11...display section, 11a...screen 14...Contact sensor 15...controller, 15a...display controller, 15b...water presence / absence determining unit A...active area, N, N'...inactive area, C...contact object, B1, B2...display content, E1 to E3...movement direction, BL...boundary, Da, Dn...image, Gd...gravity direction, H1...bottom edge, H2...top edge, H3...right edge, H4...left edge

Claims

1. a screen for displaying an image; a capacitive touch sensor that detects whether or not a touch operation is performed on the screen and the coordinates of the position of the touch operation; a control unit that displays the image on the screen and divides the screen into an active area that accepts the touch operation and an inactive area that does not accept the touch operation; The control unit a water presence determination unit that determines whether water is attached to the screen based on the detection result of the contact sensor; When the water presence determination unit determines that no water is adhering to the screen, the inactive area is set above the active area, and when the water presence determination unit determines that water is adhering to the screen, the inactive area is set below the active area in the direction of gravity. Vehicle display device.

2. the control unit displays information in the active area of ​​the screen that allows the display content to be switched by the touch operation, and displays information in the inactive area of ​​the screen that does not allow the display content to be switched by the touch operation. The vehicle display device according to claim 1 .

3. the control unit changes the display mode of the inactive area depending on whether the presence of water is determined or the absence of water is determined. The vehicle display device according to claim 1 .

4. The vehicle display device is mounted on the work vehicle so as not to be removed. The display device for a vehicle according to any one of claims 1 to 3.

5. The vehicle display device is connected to the work vehicle via wireless communication and is configured to be portable from the work vehicle. The display device for a vehicle according to any one of claims 1 to 3.

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