Display system for work vehicle and display method for work vehicle

Abstract

To display hierarchically related information on a working machine so that the hierarchy can be recognized.SOLUTION: The display system 90 of the wheel loader 1 includes the display device for displaying the information related to the wheel loader 1 as the display item, the jog dial 30 capable of accepting the operation of selecting the display item, and the display controller 80 for controlling the display in the display device 23. When the display item is selected by the jog dial 30, the display controller 80 displays the icon image corresponding to the display item on the screen after the selection, and when the selected display item has a hierarchy, the display controller 80 displays the icon image corresponding to the selected display item and the icon image corresponding to the display item of the hierarchy higher than the selected display item.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a work vehicle display system and a work vehicle display method. [Background technology]

[0002] In a work vehicle such as a wheel loader, various settings related to the work vehicle are made via a screen displayed on a display device. Patent Document 1 discloses an example of a menu screen for a work vehicle. Patent Document 2 discloses an example of a service menu screen used by a service technician for the work vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-067736 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-180697 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, information about a work vehicle, such as various items set for the work vehicle, may be organized in a hierarchical structure. In order to change a screen from one in which information in a higher hierarchy is displayed as a display item to one in which information in a lower hierarchy is displayed as a display item, the screen transitions to a screen in which the lower hierarchy information is displayed as a display item by selecting a display item from the higher hierarchy. For this reason, transitioning between screens may make it difficult to recognize the hierarchy of the displayed display items.

[0005] The present disclosure has been made in view of the above, and has an object to display hierarchically associated information relating to a work machine in a manner that allows the hierarchy to be recognized. [Means for solving the problem]

[0006] According to the present disclosure, there is provided a work vehicle display system comprising: a display device that displays information related to a work machine as display items; a selection device that can accept an operation to select the display items; and a controller that controls the display on the display device, wherein when a display item is selected by the selection device, the controller displays an icon image corresponding to the display item on a screen after selection, and when the selected display item has a hierarchy, the controller displays an icon image corresponding to the selected display item and icon images corresponding to display items that are higher in the hierarchy than the selected display item.

[0007] According to the present disclosure, there is provided a work vehicle display method in which a work vehicle display system executes the following steps: displaying information about a work machine as display items on a display device; when a display item is selected by a selection device capable of receiving an operation to select the display item, displaying an icon image corresponding to the display item on a screen after selection; and when the selected display item has a hierarchy, displaying an icon image corresponding to the selected display item and an icon image corresponding to a display item in a higher hierarchy than the selected display item. [Effects of the Invention]

[0008] According to the present disclosure, hierarchically associated information relating to a work machine can be displayed in a manner that allows the hierarchy to be recognized. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a right side view showing the overall configuration of a wheel loader, which is an example of a work vehicle according to an embodiment. [Figure 2] FIG. 2 is a schematic diagram showing an example of the interior of a driver's cab. [Figure 3] FIG. 3 is a plan view showing an example of a jog dial. [Figure 4] FIG. 4 is a block diagram showing an example of the configuration of a work vehicle including a display device for the work vehicle. [Figure 5]FIG. 5 is a diagram showing an example of the menu screen. [Figure 6] FIG. 6 is a diagram showing another example of the menu screen. [Figure 7] FIG. 7 is a diagram showing another example of the menu screen. [Figure 8] FIG. 8 is a diagram showing another example of the menu screen. [Figure 9] FIG. 9 is a diagram showing another example of the menu screen. [Figure 10] FIG. 10 is a diagram showing another example of the menu screen. [Figure 11] FIG. 11 is a diagram showing another example of the menu screen. [Figure 12] FIG. 12 is a diagram showing another example of the menu screen. [Figure 13] FIG. 13 is a block diagram illustrating a computer system according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, taking a wheel loader as an example of a work vehicle.

[0011] [Embodiment] (Work vehicle) Fig. 1 is a right side view showing the overall configuration of a wheel loader, which is an example of a work vehicle according to an embodiment. In the following description, "front" and "rear" refer to the front and rear of a vehicle body 3. That is, the right side of Fig. 1 is the "front" and the left side is the "rear." In addition, "right," "left," "up," and "down" in the following description are based on the direction as seen from the driver's cab when looking forward.

[0012] As shown in Fig. 1, the wheel loader 1 comprises a work implement 2, a vehicle body 3, front wheels 4, and rear wheels 5. The wheel loader 1 is self-propelled by the rotational driving of the front wheels 4 and rear wheels 5. The wheel loader 1 uses the work implement 2 to perform a desired task.

[0013] The work implement 2 is a mechanism driven by hydraulic oil pressurized by a hydraulic pump (not shown). The work implement 2 is disposed in front of the vehicle body 3. The work implement 2 has a bucket 2a, a boom 2b, a boom cylinder 2c, and a bucket cylinder 2d. The bucket 2a is attached to the tip of the boom 2b. The bucket 2a is lifted as the boom 2b rises. The boom 2b is attached to the front of the front vehicle body 3a, which will be described later. The boom cylinder 2c drives the boom 2b with pressurized oil discharged from the hydraulic pump. The bucket cylinder 2d drives the bucket 2a with pressurized oil discharged from the hydraulic pump.

[0014] The vehicle body 3 comprises a front vehicle body 3a and a rear vehicle body 3b. The front vehicle body 3a and the rear vehicle body 3b are connected to each other so that they can swing left and right. The front vehicle body 3a is provided with a work implement 2 and front wheels 4. The rear vehicle body 3b is provided with rear wheels 5.

[0015] The rear body 3b includes a rear frame 6, a cab 7, a hydraulic oil tank 8, an engine compartment 9, and a cooling compartment 10. The rear frame 6 is a frame that forms the skeleton of the rear body 3b. The rear frame 6 supports the rear wheels 5, the cab 7, the hydraulic oil tank 8, the engine in the engine compartment 9, the cooling unit in the cooling compartment 10, etc.

[0016] A driver's cab is provided inside the cab 7. Various operating members and control panels are provided in the cab 7. Hydraulic oil for driving the work equipment 2 and the like is stored in the hydraulic oil tank 8. A hydraulic pump supplies the hydraulic oil in the hydraulic oil tank 8 to the work equipment 2 and the like. In the embodiment, the wheel loader 1 has the cab 7 that forms an internal driver's cab with the driver's seat surrounded by glass and pillars. The wheel loader 1 may also be equipped with a canopy-type cab without glass.

[0017] A ladder 12 is provided on the right side of the cab 7 to allow the operator to get in and out of the cab 7. The ladder 12 is fixed to the rear frame 6. The ladder 12 extends from the lower end of the cab 7 to near the ground. A forward working light 51 is provided above the cab 7 to brightly illuminate the front during night work, etc.

[0018] Fig. 2 is a schematic diagram showing an example of the interior of a driver's cab. A driver's seat (not shown) is located inside the cab. A steering wheel 21 is located in front of the driver's seat, and a display device 23 is located in front of that. On the other hand, various operating devices including a collective switch device 40 for operating the work equipment are located to the right of the driver's seat.

[0019] The display device 23 is a monitor that is arranged so that the operator can check it, and displays various images.

[0020] In this embodiment, the display device 23 displays, as display items, information relating to the wheel loader 1. The display device 23 displays, for example, a menu screen and a setting screen for making various settings relating to the wheel loader 1.

[0021] The information related to the wheel loader 1 is, for example, information displayed on a menu screen and a setting screen for performing various settings related to the wheel loader 1. The information related to the wheel loader 1 is hierarchical. The information related to the wheel loader 1 is, for example, information related to "monitoring," "meter display selection," "brightness adjustment," "clock adjustment," and "language setting." "Monitoring," "meter display selection," "brightness adjustment," "clock adjustment," and "language setting" are all at the highest level. For example, the information related to "meter display selection" has "left side meter display selection" and "right side meter display selection" at the next lower level. Furthermore, for example, "left side meter display selection" has "SMR service meter," "ODO meter," and "CLK clock" at the next lower level. Furthermore, for example, "right side meter display selection" has "FUEL gauge," "SMR service meter," "ODO meter," and "CLK clock" at the next lower level. The information related to the wheel loader 1 is associated with an icon image indicating each piece of information. In the embodiment, such information related to the wheel loader 1 is stored in a memory 85 (see FIG. 4 ), which is a storage device.

[0022] (Jog dial) 3 is a plan view showing an example of a jog dial. The jog dial (selection device) 30 accepts input operations for various screens displayed on the display device 23. The jog dial 30 is disposed, for example, on the right front side of the armrest 20 on the right side of the driver's seat. The jog dial 30 can accept operations for selecting display items displayed on the display device 23. The jog dial 30 is provided with a button 31, a button 32, a button 33, a button 34, and a dial 35.

[0023] Buttons 31, 32, 33, and 34 can be pressed in the depth direction perpendicular to the plane of the paper in FIG. 3. Button 31 is located at the top left of dial 35. Button 31 is, for example, a return key. Button 32 is located at the top right of dial 35. Button 32 is, for example, a menu key. Button 33 is located at the bottom left of dial 35. Button 33 is, for example, a first shortcut key. Button 34 is located at the bottom right of dial 35. Button 34 is, for example, a second shortcut key.

[0024] The dial 35 is cylindrical. The dial 35 can be pressed along its central axis. When pressed, the dial 35 functions as an enter key, for example. The dial 35 can be tilted vertically and horizontally on the vehicle body 3 around its central axis. When tilted vertically or horizontally, the dial 35 functions as an operating lever for a work equipment lever, for example. The dial 35 can be rotated clockwise and counterclockwise around a central axis that is perpendicular to the plane of the paper in FIG. 3 . The jog dial can be turned clockwise or counterclockwise by a predetermined angle A°, for example, to increase or decrease a number from "0" to "9" by 1, thereby allowing a desired number to be input.

[0025] For example, if the corresponding number is "0" when you start entering a number, turning the dial 35 clockwise by 5×A° will input "5," and then turning it counterclockwise by 2×A° will input "3."

[0026] (collective switch device) The collective switch device 40 is disposed, for example, on the pillar 24 which is one of the components of the cab 7.

[0027] In the embodiment, each switch provided on the collective switch device 40 has a function that can be turned on and off without screen transitions on the display device 23. The switches provided on the collective switch device 40 are not assigned functions that are urgently required when the operator is performing excavation and loading work by operating the work implement levers for moving the work implement 2, or when the operator is performing traveling work by operating the accelerator, brake, or steering 21 (not shown). The switches provided on the collective switch device 40 are switches that are operated arbitrarily when the wheel loader 1 is stopped, depending on the result of determining that they are the functions that the operator requires at that time. Functions that do not require speed or urgency are assigned to functions that are executed by operating the switches provided on the collective switch device 40. The 12 switches shown in the present embodiment are merely an example of the number of switches provided on the collective switch device 40, and are not limited thereto.

[0028] Functions that require speed or urgency may be assigned as functions executed by operating the switches provided on the collective switch device 40. For example, in order to stop a work vehicle in an emergency, when any of the switches is operated, a drive signal may be output to a relay switch for cutting off a power supply line to a battery (not shown), which is then driven to stop the work vehicle. Alternatively, when any of the switches is operated in an emergency to stop the work vehicle, a switch state signal may be transmitted to the vehicle body controller 60 via the in-vehicle network N, and the vehicle body controller 60 may stop fuel injection from a fuel injection device (not shown) to the engine, thereby stopping the work vehicle, for example.

[0029] (Vehicle controller) 4 is a block diagram showing an example of the configuration of a work vehicle including a display device for the work vehicle. The display device 23, jog dial 30, collective switch device 40, vehicle controller 60, display controller 80, sensor group 71, and actuator group 72 are connected to an on-board network N such as a CAN.

[0030] The vehicle body controller 60 includes a numerical calculation device (processor) such as a CPU (Central Processing Unit). The vehicle body controller 60 is a controller that controls a driving unit in the vehicle body, for example, the tilt angle of a swash plate of a swash plate-type hydraulic pump driven by an engine. The sensor group 71 includes an engine rotation sensor, a vehicle speed sensor, etc.

[0031] (Display Controller) The display controller 80 includes a numerical calculation device (processor) such as a CPU. The display controller 80 controls the display on the display device 23.

[0032] The display controller 80 displays information relating to the wheel loader 1 as display items on the display device 23. The display device 23 displays, for example, a menu screen and a setting screen for making various settings relating to the wheel loader 1.

[0033] When a display item displayed on the display device 23 is selected by the jog dial 30, the display controller 80 displays an icon image corresponding to the display item on the screen after selection. When the selected display item has a hierarchy, the display controller 80 displays an icon image corresponding to the selected display item and icon images corresponding to display items in a hierarchy higher than the selected display item.

[0034] When a display item is selected using the jog dial 30, the display controller 80 displays an icon image corresponding to the display item on the left side of the screen after the selection, and displays the selected display item on the right side of the icon image.

[0035] The display controller 80 displays the icon image in a strip-shaped area that is arranged on the left side of the screen after the selection and has a curved shape that is convex to the right.

[0036] If there are two or more layers higher than the selected display item, the display controller 80 displays an icon image corresponding to the display item in the layer one layer higher than the layer of the selected display item.

[0037] The menu screens for each setting will be described using Figures 5 to 10. Display items have a hierarchy. The highest hierarchy includes, for example, "Monitoring," "Meter Display Selection," "Brightness Adjustment," "Clock Adjustment," and "Language Setting." "Meter Display Selection" has "Left Meter Display Selection" and "Right Meter Display Selection" as display items in the hierarchy below. "Left Meter Display Selection" has "SMR Service Meter," "ODO Meter," and "CLK Clock" as display items in the hierarchy below. "Right Meter Display Selection" has "FUEL Gauge," "SMR Service Meter," "ODO Meter," and "CLK Clock" as display items in the hierarchy below.

[0038] Fig. 5 is a diagram showing an example of a menu screen. Fig. 5 is the top screen of a hierarchical screen related to "Operator Monitor Settings." A first area 101, a second area 110, a first strip area 120, and a selection area 150 are arranged on a screen 100 shown in Fig. 5. In Fig. 5, "Meter Display Selection" is selected from the display items displayed in the selection area 150.

[0039] 5, the icon images corresponding to the display items displayed in the first area 101 and the display items displayed in the second area 110 are at the same hierarchical level. The icon images corresponding to the display items displayed in the first strip area 120 and the display items displayed in the selection area 150 are at the same hierarchical level. The hierarchical level of the display items displayed in the first area 101 and the second area 110 is one hierarchical level higher than the hierarchical level of the display items displayed in the first strip area 120 and the selection area 150.

[0040] The first area 101 is disposed at the top of the screen 100. The first area 101 is a horizontally long rectangular area. The first area 101 is an area that displays icon images corresponding to the highest level display items among the display items currently being displayed, arranged in tab form. In the first area 101, the icon image corresponding to the selected display item among the icon images arranged in the first area 101 is displayed in a more emphasized manner than the icon images corresponding to the other display items. In the first area 101 shown in FIG. 5, the icon image 101A corresponding to "Operator Monitor Settings" is displayed in a darker color to emphasize it, and the other icon images are displayed in a lighter color to de-emphasize it.

[0041] The second area 110 is disposed below the first area 101. The second area 110 is a horizontally long rectangle. The second area 110 is an area that displays a display item corresponding to a selected icon image among the icon images arranged in the first area 101. The second area 110 shown in FIG. 5 displays the character string "Operator Monitor Settings."

[0042] The first strip area 120 is disposed on the left side of the screen 100. The first strip area 120 is disposed below the second area 110. The first strip area 120 is a strip area with a curved shape that convexly curves to the right. The first strip area 120 is an area that displays icon images corresponding to the lowest-level display items among the currently displayed display items. In the first strip area 120, an icon image corresponding to the currently selected display item among the icon images corresponding to the display items displayed in the selection area 150 is displayed in a more emphasized manner than the icon images corresponding to the other display items. In the first strip area 120 shown in FIG. 5, an icon image 120A corresponding to "meter display selection" is displayed in a darker emphasized manner, and the other icon images are displayed in a lighter emphasized manner. A cursor image 110C is displayed at the left end of the first strip area 120.

[0043] Selection area 150 is located to the right of first band area 120. Selection area 150 is located below second area 110. Selection area 150 is an area that displays a list of display items that can be selected on screen 100. Selection area 150 is an area that displays a display item corresponding to a selected icon image among the icon images arranged in first band area 120 in a highlighted manner compared to the other display items. In selection area 150 shown in FIG. 5, a frame image 150A indicating that the item is selected is displayed around the character string "METER DISPLAY SELECTION," and no frame image is displayed around the character strings of the other display items.

[0044] 5, when the dial 35 of the jog dial 30 is rotated, a frame image 150A indicating that the item is currently selected moves up or down among the list-like display items according to the amount of rotation (angle of rotation). In conjunction with the up or down movement of the frame image 150A, the icon image displayed in a highlighted manner in the first band-shaped area 120 also changes. When the dial 35 of the jog dial 30 is pressed, the display item currently selected, in other words, the display item where the frame image 150A is located, is selected and a confirmation operation is performed.

[0045] Fig. 6 is a diagram showing another example of a menu screen. Fig. 6 is a "Meter Display Selection" screen transitioned from the screen shown in Fig. 5. Fig. 6 is a screen one level lower than Fig. 5 among the hierarchical screens related to "Operator Monitor Settings." Screen 100 shown in Fig. 6 is arranged with a first area 101, a second area 110, a first band area 120, a second band area 140, and a selection area 150. In Fig. 6, "Left Meter Display Selection" is selected from the display items displayed in selection area 150.

[0046] 6, the display items displayed in the second area 110 and the icon images corresponding to the display items displayed in the first strip area 120 are at the same hierarchical level. The icon images corresponding to the display items displayed in the second strip area 140 and the display items displayed in the selection area 150 are at the same hierarchical level. The icon images corresponding to the display items displayed in the first area 101 are at a hierarchical level one level higher than the hierarchical levels of the display items displayed in the second area 110 and the first strip area 120. The hierarchical levels of the display items displayed in the second area 110 and the first strip area 120 are at a hierarchical level one level higher than the hierarchical levels of the display items displayed in the second strip area 140 and the selection area 150.

[0047] The first region 101 is the same as in FIG.

[0048] The second area 110 is an area that displays display items corresponding to the icon images displayed in the first band area 120. The second area 110 is an area that displays display items that are one level higher than the display items displayed in the second band area 140 and the selection area 150. The second area 110 shown in FIG. 6 is the display item selected in the selection area 150 shown in FIG. 5. The second area 110 shown in FIG. 6 displays the character string "METER DISPLAY SELECTION".

[0049] First band area 120 is an area that displays icon images corresponding to the display items displayed in second area 110. First band area 120 is an area that displays icon images corresponding to display items that are one level higher than the level of the display items displayed in second band area 140 and selection area 150. First band area 120 shown in FIG. 6 is an area that displays icon images corresponding to the display items selected in selection area 150 shown in FIG. 5. First band area 120 shown in FIG. 6 displays icon image 120A corresponding to "meter display selection."

[0050] The second band region 140 is disposed to the right of the first band region 120. The second band region 140 is disposed below the second region 110. The second band region 140 is a band region having a curved shape that convexly curves to the right. The second band region 140 is a region that displays icon images corresponding to the lowest-level display items among the currently displayed display items. In the second band region 140, the icon image corresponding to the currently selected display item among the icon images corresponding to the display items displayed in the selection region 150 is displayed in a more emphasized manner than the icon images corresponding to the other display items. In the second band region 140 shown in FIG. 6, the icon image 140A corresponding to "Left meter display selection" is displayed in a darker emphasized manner, and the other icon images are displayed in a lighter emphasized manner.

[0051] Selection area 150 is disposed to the right of second band area 140. Selection area 150 is an area in which a display item corresponding to a selected icon image among the icon images arranged in second band area 140 is displayed in a more emphasized manner than other display items. In selection area 150 shown in FIG. 6, a frame image 150A indicating that the icon image is selected is displayed around the character string "Select left meter display," but no frame image is displayed around the character string "Select right meter display."

[0052] 6, when the dial 35 of the jog dial 30 is rotated, a frame image 150A indicating that the item is currently selected moves up or down among the list-like display items according to the amount of rotation (angle of rotation). In conjunction with the up or down movement of the frame image 150A, the icon image displayed in a highlighted manner in the second band-shaped area 140 also changes. When the dial 35 of the jog dial 30 is pressed, the display item currently selected, in other words, the display item where the frame image 150A is located, is selected and confirmed.

[0053] FIG. 7 is a diagram showing another example of a menu screen. FIG. 7 is a "Left Meter Display Selection" screen transitioned from the screen shown in FIG. 6. FIG. 7 is an example of a screen one level lower than FIG. 6 among hierarchical screens related to "Operator Monitor Settings." A screen 100 shown in FIG. 7 includes a first area 101, a second area 110, a first band area 120, a second band area 140, and a selection area 150. The hierarchical relationship among the first area 101, the second area 110, the first band area 120, the second band area 140, and the selection area 150 is the same as that shown in FIG. 6. In FIG. 7, "SMR Service Meter" is selected from the display items displayed in the selection area 150.

[0054] The first region 101 is the same as in FIG.

[0055] The second area 110 is the same as in Fig. 6. The second area 110 shown in Fig. 7 is the display item selected in the selection area 150 shown in Fig. 6. The second area 110 shown in Fig. 7 displays the character string "Select left meter display."

[0056] The first band area 120 is the same as that shown in Fig. 6. The first band area 120 shown in Fig. 7 is an area that displays an icon image corresponding to the display item selected in the selection area 150 shown in Fig. 6. The first band area 120 shown in Fig. 7 displays an icon image 120A corresponding to "Left meter display selection."

[0057] The second band area 140 is the same as that shown in Fig. 6. In the second band area 140 shown in Fig. 7, the icon image 140A corresponding to the "SMR service meter" is displayed in a darkened, emphasized manner, and the other icon images are displayed in a lighter, non-emphasized manner.

[0058] Selection area 150 is the same as in Fig. 6. In selection area 150 shown in Fig. 7, a frame image 150A indicating that the character string "SMR service meter" is selected is displayed around the character string of the other display items, and no frame image is displayed around the character string of the other display items.

[0059] Another example of Fig. 7 will be described using Fig. 8. Fig. 8 is a diagram showing another example of the menu screen. An icon image 120A corresponding to "meter display selection" may be displayed in the first band area 120, and an icon image 140A corresponding to "left meter display selection" may be displayed in the second band area 140.

[0060] Another example of Fig. 7 will be described using Fig. 9. Fig. 9 is a diagram showing another example of the menu screen. An icon image 120A corresponding to "meter display selection" may be displayed in the first band area 120, an icon image 140A corresponding to "left side meter display selection" may be displayed in the second band area 140, and a third band area 160 may be provided to the right thereof, displaying an icon image 160A corresponding to "SMR service meter."

[0061] FIG. 10 is a diagram showing another example of a menu screen. FIG. 10 is a "Right Meter Display Selection" screen transitioned from the screen shown in FIG. 6. FIG. 10 is a screen one level lower than FIG. 6 among the hierarchical screens related to "Operator Monitor Settings." FIG. 10 is a screen at the same level as FIG. 7. A screen 100 shown in FIG. 10 is arranged with a first area 101, a second area 110, a first band area 120, a second band area 140, and a selection area 150. The hierarchical relationship among the first area 101, the second area 110, the first band area 120, the second band area 140, and the selection area 150 is the same as that shown in FIG. 6. In FIG. 10, "CLK Clock" is selected from the display items displayed in the selection area 150.

[0062] The first region 101 is the same as in FIG.

[0063] The second area 110 is the same as in Fig. 7. In the second area 110 shown in Fig. 10, the character string "Select right meter display" is displayed.

[0064] The first band area 120 is the same as in Fig. 7. In the first band area 120 shown in Fig. 10, an icon image 120A corresponding to "Right meter display selection" is displayed.

[0065] The second band area 140 is the same as that shown in Fig. 6. In the second band area 140 shown in Fig. 10, the icon image 140A corresponding to the "CLK clock" is displayed in a darkened, emphasized manner, and the other icon images are displayed in a lighter, non-emphasized manner.

[0066] Selection area 150 is the same as in Fig. 6. In selection area 150 shown in Fig. 10, a frame image 150A indicating that the character string "CLK CLOCK" is selected is displayed around the character string, and no frame image is displayed around the character strings of the other display items.

[0067] Another example of Fig. 10 will be described using Fig. 11. Fig. 11 is a diagram showing another example of the menu screen. An icon image 120A corresponding to "meter display selection" may be displayed in the first band area 120, and an icon image 140A corresponding to "right meter display selection" may be displayed in the second band area 140.

[0068] Another example of Fig. 10 will be described with reference to Fig. 12. Fig. 12 is a diagram showing another example of the menu screen. An icon image 120A corresponding to "Meter Display Selection" may be displayed in the first band area 120, an icon image 140A corresponding to "Right Meter Display Selection" may be displayed in the second band area 140, and a third band area may be provided to the right thereof, in which an icon image 160A corresponding to "CLK Clock" may be displayed.

[0069] FIG. 13 is a block diagram showing a computer system according to an embodiment. The vehicle body controller 60 and the display controller 80 comprise a computer system 1000. The computer system 1000 includes a processor 1001 such as a CPU, a main memory 1002 including a nonvolatile memory such as a read-only memory (ROM) and a volatile memory such as a random access memory (RAM), a storage 1003, and an interface 1004 including an input / output circuit. The functions of the vehicle body controller 60 and the display controller 80 described above are stored as a program in the storage 1003. The processor 1001 reads the program from the storage 1003, loads it into the main memory 1002, and executes the above-described processing in accordance with the program. The program may be distributed to the computer system 1000 via a network.

[0070] The display system 90 of the work vehicle includes at least the display device 23 and a display controller 80. The display system 90 of the work vehicle may further include a jog dial 30.

[0071] (Display method) The display method for the wheel loader 1 will now be described. Information relating to the wheel loader 1 is displayed as display items on the display device 23 by the display controller 80. When a display item is selected using the jog dial 30, the display controller 80 causes an icon image corresponding to the display item to be displayed on the screen after selection. When the selected display item has a hierarchy, the display controller 80 causes an icon image corresponding to the selected display item and icon images corresponding to display items in a hierarchy higher than the selected display item to be displayed.

[0072] (effect) As described above, in the embodiment, when a display item is selected, an icon image corresponding to the display item can be displayed on the screen after selection. In the embodiment, if the selected display item has a hierarchy, an icon image corresponding to the selected display item and icon images corresponding to display items in a hierarchy higher than the selected display item can be displayed. According to the embodiment, hierarchically associated information related to the wheel loader 1 can be displayed so that the hierarchy can be recognized.

[0073] In the embodiment, when a display item is selected, an icon image corresponding to the display item is displayed on the left side of the screen after selection, and the selected display item is displayed on the right side of the icon image. In the embodiment, when a display item is selected and a screen transition is made, the icon image and the display item can be displayed side by side.

[0074] In the embodiment, an icon image can be displayed in a strip-shaped area that is located on the left side of the screen after selection and has a curved shape that convex to the right. According to the embodiment, an icon image can be displayed in a first strip-shaped area or a second strip-shaped area that is shaped to match the shape of the jog dial 30, which is the selection device.

[0075] In the embodiment, if there are two or more layers higher than the selected display item, an icon image corresponding to the display item one layer higher than the layer of the selected display item can be displayed.

[0076] In the embodiment, the information relating to the wheel loader 1 is information displayed on a menu screen and a setting screen for performing various settings relating to the wheel loader 1. According to the embodiment, on the menu screen and the setting screen for performing various settings relating to the wheel loader 1, information associated in a hierarchical manner can be displayed so that the hierarchies can be recognized.

[0077] In the embodiment, the information related to the wheel loader 1 is information related to monitoring, meter display selection, brightness adjustment, clock adjustment, and language setting. According to the embodiment, on the menu screen and setting screen for performing various settings related to the wheel loader 1, information associated in a hierarchical manner can be displayed so that the hierarchies can be recognized.

[0078] In the embodiment, when a display item is selected, an icon image corresponding to the display item can be displayed together with the display item on the screen after selection.

[0079] [Variations] In the above-described embodiments, the work vehicle is not limited to a wheel loader, but may be other work vehicles such as a bulldozer, a hydraulic excavator, or a dump truck. [Explanation of symbols]

[0080] 1...wheel loader, 2...work implement, 2a...bucket, 2b...boom, 2c...boom cylinder, 2d...bucket cylinder, 3...body, 3a...front body, 3b...rear body, 4...front wheels, 5...rear wheels, 6...rear frame, 7...cab, 8...hydraulic oil tank, 9...engine compartment, 10...cooling compartment, 12...ladder, 20...armrest, 21...steering, 23...display device, 24...pillar, 30...jog dial (selection device), 40...collective switch device, 60...body controller, 71...sensor group, 72...actuator group, 80...display controller, 85...memory, 90...display system

Claims

1. a display device that displays information about the work machine as display items; a selection device capable of accepting an operation to select the display item; a controller for controlling display on the display device; Equipped with The controller When the display item is selected by the selection device, an icon image corresponding to the display item is displayed on the screen after selection; When the selected display item has a hierarchy, an icon image corresponding to the selected display item and an icon image corresponding to a display item in a hierarchy higher than the selected display item are displayed. Work vehicle display system.

2. When the display item is selected by the selection device, the controller displays an icon image corresponding to the display item on the left side of the screen after selection, and displays the selected display item on the right side of the icon image. The work vehicle display system according to claim 1 .

3. the selection device is a jog dial; the controller displays the icon image in a strip-shaped area that is arranged on the left side of the screen after selection and has a curved shape that is convex to the right; The work vehicle display system according to claim 1 .

4. when there are two or more layers higher than the selected display item, the controller displays an icon image corresponding to the display item in the layer one layer higher than the layer of the selected display item; The work vehicle display system according to claim 1 .

5. The information about the work machine is information displayed on a menu screen and a setting screen for performing various settings related to the work vehicle. The work vehicle display system according to claim 1 .

6. the information relating to the work machine is information relating to monitoring, meter display selection, brightness adjustment, clock adjustment, and language setting; The work vehicle display system according to claim 5 .

7. The controller When the display item is selected by the selection device, an icon image corresponding to the display item is displayed together with the display item on a screen after the selection. The work vehicle display system according to claim 1 .

8. Displaying information about the work machine as display items on a display device; When the display item is selected by a selection device capable of accepting an operation to select the display item, an icon image corresponding to the display item is displayed on a screen after the selection; When the selected display item has a hierarchy, displaying an icon image corresponding to the selected display item and an icon image corresponding to a display item in a hierarchy higher than the selected display item; The work vehicle display system executes a work vehicle display method.

9. When the display item is selected by the selection device, an icon image corresponding to the display item is displayed on the left side of the screen after selection, and the selected display item is displayed on the right side of the icon image. The work vehicle display method according to claim 8.

10. the selection device is a jog dial; After the selection, the icon image is displayed in a strip-shaped area that is arranged on the left side of the screen and has a curved shape that is convex to the right. The work vehicle display method according to claim 8.

11. When there are two or more layers higher than the selected display item, an icon image corresponding to the display item in the layer one layer higher than the layer of the selected display item is displayed. The work vehicle display method according to claim 8.

12. The information about the work machine is information displayed on a menu screen and a setting screen for performing various settings related to the work vehicle. The work vehicle display method according to claim 8.

13. the information relating to the work machine is information relating to monitoring, meter display selection, brightness adjustment, clock adjustment, and language setting; The work vehicle display method according to claim 12.

14. When the display item is selected by the selection device, an icon image corresponding to the display item is displayed together with the display item on a screen after the selection. The work vehicle display method according to claim 8.

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