Display device and working machine equipped with same

Abstract

To provide a display device capable of allowing a user to check the content of an error without performing complicated operations, and a working machine including the same.SOLUTION: A display device 9 includes a display unit 91, a reception unit 92, and a control unit 93. The display unit 91 displays a first screen 510 that has a selection item display area 511. The reception unit 92 receives an instruction to select a selection item T displayed on the selection item display area 511. The control unit 93 controls the selection item display area 511 to display an alarm mark image 620 based on a piece of alert information indicating that an error has occurred. The control unit 93 is configured so as to, when the alarm mark image 620 is displayed on the selection item display area 511, assign a function to receive an alarm mark selection instruction that is an instruction to select the alarm mark image 620 to the reception unit 92. The control unit 93 is configured so as to, when the reception unit 92 receives an alarm mark selection instruction, control the display unit 91 to display a second screen 520 representing the content of the error.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a display device and a work machine equipped with the same. [Background technology]

[0002] A display device has been proposed that displays a warning logo on a basic screen when an abnormality occurs (see, for example, Patent Document 1). The display device of Patent Document 1 displays a menu screen when an operation switch is operated with a warning logo displayed on the basic screen. Warning items are added to the menu screen. The display device of Patent Document 1 displays a warning list screen when an operation switch is operated with the cursor selecting a warning item. The warning list screen displays a warning logo and the name of the warning. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-231488 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the display device of Patent Document 1, the worker needs to display a menu screen from the basic screen and then display a warning list screen from the menu screen, which requires the worker to perform complicated operations to check the contents of the warning.

[0005] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a display device that enables the content of an error to be confirmed without performing complicated operations, and a work machine equipped with the same. [Means for solving the problem]

[0006] A display device according to the present invention includes a display unit, a reception unit, and a control unit. The display unit displays a first screen having a selection item display area. The reception unit receives an instruction to select a selection item displayed in the selection item display area. The control unit causes an alarm mark image to be displayed in the selection item display area based on alarm information indicating that an error has occurred. When the control unit causes the alarm mark image to be displayed in the selection item display area, the control unit assigns to the reception unit a function of receiving an alarm mark selection instruction, which is an instruction to select the alarm mark image. When the reception unit receives the alarm mark selection instruction, the control unit causes the display unit to display a second screen indicating the content of the error. Effect of the Invention

[0007] According to the present invention, the content of an error can be confirmed without performing complicated operations. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view of a work machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a machine body of a work machine. [Diagram 3] 1 is a block diagram of a work machine according to an embodiment of the present invention. [Figure 4] 1 is a diagram showing a display device according to an embodiment of the present invention; [Diagram 5] FIG. 13 is a diagram showing a display device displaying an error message and a warning mark image. [Figure 6] FIG. 11 is another diagram showing the display device displaying an error message and a warning mark image. [Figure 7] FIG. 11 is another diagram showing the display device displaying an error message and a warning mark image. [Figure 8] FIG. 11 is another diagram showing the display device displaying an error message and a warning mark image. [Figure 9] FIG. 13 is a diagram showing a display device displaying an error information screen. [Figure 10] FIG. 13 is a diagram showing a display device displaying an error information details screen. [Figure 11] 13A is a diagram showing another example 1 of the error message, and FIG. 13B is a diagram showing another example 2 of the error message. [Figure 12] FIG. 13 is a diagram showing a modified example of the display device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the display device and the work machine of the present invention will be described with reference to the drawings (FIGS. 1 to 12). However, the present invention is not limited to the following embodiment. Note that where the description overlaps, the description may be omitted as appropriate. In addition, in the drawings, the same or corresponding parts are given the same reference symbols and the description will not be repeated.

[0010] First, a work machine 1 of this embodiment will be described with reference to Figs. 1 to 3. Fig. 1 is a side view of the work machine 1 of this embodiment. As shown in Fig. 1, the work machine 1 of this embodiment is a backhoe. A backhoe is a type of construction machine. The work machine 1 of this embodiment comprises a machine body 2, a boom 3, an arm 4, a bucket 5, and a traveling device 7. The work machine 1 of this embodiment further comprises a boom actuator 30, an arm actuator 40, and an attachment actuator 50.

[0011] The machine body 2 has a driver's seat 6. An operator sits in the driver's seat 6 to operate the work machine 1. The machine body 2 is supported by a traveling device 7. The machine body 2 may be supported by the traveling device 7 so as to be freely rotatable. The machine body 2 is provided with an engine 12 (see FIG. 3), a fuel tank, a battery, a hydraulic system, and a hydraulic oil tank. The machine body 2 is also provided with a bonnet that houses the engine 12 (see FIG. 3), a fuel tank, a battery, a hydraulic system, and a hydraulic oil tank, and the driver's seat 6 is disposed on the bonnet.

[0012] The boom 3 is supported by the machine body 2 so as to be able to swing freely around a first rotation fulcrum P1. Specifically, the base end of the boom 3 is pivotally supported by the machine body 2. The first rotation fulcrum P1 is a rotation axis extending along the left-right direction when the operator's seat 6 is viewed from the front. Hereinafter, the left-right direction when the operator's seat 6 is viewed from the front may be referred to as the "left-right direction."

[0013] The boom actuator 30 operates the boom 3. Specifically, the boom actuator 30 extends and retracts, causing the boom 3 to swing about the first rotation fulcrum P1. More specifically, the boom actuator 30 is extended and retracted by controlling the supply of hydraulic oil to the boom actuator 30 and the discharge of hydraulic oil from the boom actuator 30. Therefore, the boom actuator 30 extends and retracts due to the hydraulic oil.

[0014] The arm 4 is supported by the boom 3 so as to be able to swing freely around a second rotation fulcrum P2. Specifically, a base end of the arm 4 is pivotally supported at a tip end of the boom 3. The second rotation fulcrum P2 is a rotation axis extending along the left-right direction.

[0015] The arm actuator 40 operates the arm 4. Specifically, the arm actuator 40 extends and retracts, causing the arm 4 to swing about the second rotation fulcrum P2. More specifically, the arm actuator 40 is extended and retracted by controlling the supply of hydraulic oil to the arm actuator 40 and the discharge of hydraulic oil from the arm actuator 40. Therefore, the arm actuator 40 extends and retracts due to the hydraulic oil.

[0016] The bucket 5 is a type of attachment. The bucket 5 is supported by the arm 4 so as to be able to swing about a third rotation fulcrum P3. Specifically, the bucket 5 is supported at the tip of the arm 4. The third rotation fulcrum P3 is a rotation axis extending in the left-right direction.

[0017] The attachment actuator 50 operates the bucket 5. Specifically, the bucket 5 swings about the third rotation fulcrum P3 as the attachment actuator 50 extends and retracts. More specifically, the attachment actuator 50 is extended and retracted by controlling the supply of hydraulic oil to the attachment actuator 50 and the discharge of hydraulic oil from the attachment actuator 50. Therefore, the attachment actuator 50 extends and retracts due to the hydraulic oil.

[0018] The traveling device 7 causes the working machine 1 to travel. In this embodiment, the traveling device 7 is a crawler type traveling device.

[0019] Next, the configuration of the work machine 1 will be further described with reference to Figures 1 and 2. Specifically, the configuration around the driver's seat 6 will be described. Figure 2 is a perspective view of the machine body 2 of the work machine 1.

[0020] 2, the work machine 1 further includes a control unit 8 and a display device 9. The control unit 8 and the display device 9 are provided on the machine body 2. Specifically, the control unit 8 and the display device 9 are disposed in front of the driver's seat 6.

[0021] The control unit 8 includes various operating members that enable the operator to operate the work machine 1. The various operating members include a boom operating lever 81 and an arm operating lever 82. The operator operates the boom operating lever 81 and the arm operating lever 82 by hand. The operator can operate the boom 3 by operating the boom operating lever 81. In addition, the operator can operate the arm 4 by operating the arm operating lever 82.

[0022] The display device 9 displays various screens. In detail, as will be described later with reference to Figs. 4 to 8 etc., the display device 9 displays a home screen 510. Furthermore, as will be described later with reference to Fig. 9 etc., the display device 9 displays an error information screen 520. Furthermore, as will be described later with reference to Fig. 10 etc., the display device 9 displays an error information details screen 530.

[0023] Next, the configuration of the work machine 1 of this embodiment will be further described with reference to Figs. 1 to 3. Fig. 3 is a block diagram of the work machine 1 of this embodiment. As shown in Fig. 3, the work machine 1 further includes an imaging device 10, a first controller 11, an engine 12, and a second controller 13. The work machine 1 also includes various sensors. In this embodiment, the work machine 1 includes an accelerator sensor 101, a cooling water temperature sensor 102, and a hydraulic oil temperature sensor 103. The steering unit 8 also includes an accelerator volume 85.

[0024] The imaging device 10 captures an image of the surrounding environment of the work machine 1 to generate a captured image G (video). Specifically, the imaging device 10 captures an image of the area behind the driver's seat 6. The captured image G is displayed by the display device 9. Specifically, when the prohibition on operation of the work machine 1 is lifted, the first controller 11 instructs the display device 9 to display the captured image G. In more detail, when the first controller 11 detects that the cutoff lever, which prohibits operation of the work machine 1, has been lowered with the engine 12 keyed on, it instructs the display device 9 to display the captured image G.

[0025] The engine 12 generates a driving force for driving the traveling device 7. The second controller 13 controls the engine 12 based on commands transmitted from the first controller 11.

[0026] The second controller 13 includes, for example, a processing unit that executes various processes, a storage unit that stores various programs and various data, and an input / output interface. The processing unit is configured by, for example, a processor that executes various calculations, such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). Alternatively, the processing unit may be configured by a general-purpose computing machine. The storage unit includes, for example, a semiconductor memory. The storage unit is configured by, for example, a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage unit may further include a non-volatile memory, such as an EEPROM (registered trademark) or a flash memory. The second controller 13 is configured by, for example, an ECU (Electronic Control Unit).

[0027] An operator manually operates the accelerator volume 85. The accelerator volume 85 is electrically connected to the second controller 13. When the operator operates the accelerator volume 85 to rotate forward or backward, the rotation speed of the engine 12 increases or decreases.

[0028] The accelerator sensor 101 detects the operation position (rotation position) of the accelerator volume 85. The first controller 11 transmits a command for controlling the amount of fuel injected into the engine 12 and the injection timing to the second controller 13 based on the operation position of the accelerator volume 85 detected by the accelerator sensor 101.

[0029] Furthermore, the first controller 11 determines whether or not the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier) by comparing the operation position of the accelerator volume 85 detected by the accelerator sensor 101 with a threshold value.

[0030] The coolant temperature sensor 102 detects the temperature of the coolant circulating inside the engine 12. The first controller 11 determines whether or not the temperature of the coolant detected by the coolant temperature sensor 102 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the temperature of the coolant detected by the coolant temperature sensor 102 indicates an abnormal value (outlier) by comparing the temperature of the coolant detected by the coolant temperature sensor 102 with a threshold value.

[0031] The hydraulic oil temperature sensor 103 detects the temperature of the hydraulic oil. The first controller 11 determines whether or not the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier) by comparing the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 with a threshold value.

[0032] The first controller 11 controls each part of the work machine 1. The first controller 11 includes, for example, a processing unit that executes various processes, a storage unit that stores various programs and various data, and an input / output interface. The first controller 11 is configured by, for example, an ECU.

[0033] When the first controller 11 detects that an error has occurred in the work machine 1, it transmits warning information to the display device 9. The warning information indicates that an error has occurred in the work machine 1. In particular, the warning information includes information indicating the error name, information indicating the error code, and information indicating the warning level. The warning information also includes information indicating a method of dealing with the error. The error name, error code, warning level, and method of dealing with the error are set in advance for each error that is expected to occur in the work machine 1. In this embodiment, the first controller 11 is an example of a transmitting unit.

[0034] Specifically, when the first controller 11 determines that the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier), it transmits warning information to the display device 9. Similarly, when the first controller 11 determines that the coolant temperature detected by the coolant temperature sensor 102 indicates an abnormal value (outlier), it transmits warning information to the display device 9. In addition, when the first controller 11 determines that the hydraulic oil temperature detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier), it transmits warning information to the display device 9.

[0035] The display device 9 includes a display unit 91 , an operation unit 92 , and a third controller 93 .

[0036] The display unit 91 is configured with a display such as a liquid crystal display or an organic EL display. The display unit 91 displays an image indicating that an error has occurred based on the alarm information. Specifically, the third controller 93 causes the display unit 91 to display an image indicating that an error has occurred based on the alarm information. Hereinafter, the image indicating that an error has occurred may be referred to as an "error notification image."

[0037] The operation unit 92 is operated by an operator to receive various instructions. The operator can input various instructions to the third controller 93 by operating the operation unit 92.

[0038] The third controller 93 displays various screens on the display unit 91 based on various information transmitted from the first controller 11. The third controller 93 includes, for example, a processing unit that executes various processes, a storage unit that stores various programs and various data, and an input / output interface. The third controller 93 is, for example, configured by an ECU. The third controller 93 is an example of a control unit.

[0039] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 10. Fig. 4 is a diagram showing the display device 9 of this embodiment. In detail, Fig. 4 shows the display device 9 displaying a home screen 510. The home screen 510 is an example of a first screen. The home screen 510 displays, for example, a fuel level gauge, a coolant temperature gauge, and a hydraulic oil temperature gauge.

[0040] As shown in FIG. 4, the display unit 91 displays a home screen 510. The home screen 510 has a first selection item display area 511 and a first notification area 512. The first selection item display area 511 displays various selection items T. Specifically, the first selection item display area 511 displays a character image (character string image) or a mark indicating the various selection items T. The mark is, for example, an icon, a figure, or a pictogram. The first selection item display area 511 is disposed at the bottom of the home screen 510.

[0041] In this embodiment, the operation unit 92 includes a plurality of operation switches. The operation switches are hard keys. Specifically, the operation unit 92 includes a first operation switch 921 to a sixth operation switch 926. The first operation switch 921 to the sixth operation switch 926 are arranged below the display unit 91 in a planar view. Therefore, the first operation switch 921 to the sixth operation switch 926 are arranged below the first selection item display area 511 in a planar view.

[0042] The first operation switch 921 to the sixth operation switch 926 correspond one-to-one to the selection items T displayed in the first selection item display area 511. When the display unit 91 is displaying the home screen 510, the first operation switch 921 to the sixth operation switch 926 are assigned a function of receiving an instruction to select a corresponding one of the selection items T displayed in the first selection item display area 511. In other words, the first operation switch 921 to the sixth operation switch 926 each receive an instruction to select the corresponding selection item T. The first operation switch 921 to the sixth operation switch 926 are each disposed below the corresponding selection item T in a plan view. The operation unit 92 is an example of a reception unit.

[0043] For example, the selection items T include a selection item T1, and a function of receiving an instruction to select the selection item T1 is assigned to the sixth operation switch 926. The selection item T1 is an item for switching information displayed in the first notification area 512. For example, every time the operator presses the sixth operation switch 926, the third controller 93 switches the information displayed in the first notification area 512 between information indicating the RPM of the engine 12 and information indicating the remaining amount of fuel.

[0044] According to this embodiment, the operation unit 92 includes hard keys (first operation switch 921 to sixth operation switch 926). Therefore, the worker can operate the operation unit 92 while wearing protective gear such as work gloves. Furthermore, according to this embodiment, the first operation switch 921 to sixth operation switch 926 are each disposed below the corresponding selection item T in a plan view. Therefore, the worker can easily grasp the relationship between each of the first operation switch 921 to sixth operation switch 926 and each selection item T. As a result, the worker can easily select a desired selection item T.

[0045] The home screen 510 further has a second notification area 513. The second notification area 513 is located at the top of the home screen 510. When the first controller 11 detects the occurrence of an error, the third controller 93 displays an error message 610 and an alarm mark image 620, which will be described with reference to FIG. 5 etc., in the second notification area 513. In other words, when the third controller 93 receives alarm information from the first controller 11, it displays the error message 610 and the alarm mark image 620 in the second notification area 513.

[0046] 4 shows a home screen 510 that is displayed on the display unit 91 when the first controller 11 has not detected the occurrence of an error. Therefore, an error message 610 and an alarm mark image 620 are not displayed in the second notification area 513. In the following description, the second notification area 513 may be referred to as an "alarm display area 513."

[0047] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 5. Fig. 5 is a diagram showing the display device 9 displaying an error message 610 and an alarm mark image 620. As shown in Fig. 5, the third controller 93 displays an error notification image in the alarm display area 513 based on the alarm information. The error notification image includes the error message 610 and the alarm mark image 620. The error notification image (error message 610 and alarm mark image 620) is displayed in the alarm display area 513, allowing the operator to visually recognize that an error has occurred in the work machine 1.

[0048] The error message 610 is a character string image indicating that an error has occurred. For example, as shown in FIG. 5, the error message 610 is a character string image indicating "An error has occurred". The error message 610 is an example of a predetermined message. According to this embodiment, a character string image (error message 610) indicating that an error has occurred is displayed on the home screen 510 (alarm display area 513), so that the worker can easily understand that an error has occurred in the work machine 1.

[0049] The alarm mark image 620 is a mark image indicating that an error has occurred. Specifically, the alarm mark image 620 indicates an alarm level. The mark image is, for example, an icon, a graphic, or a pictogram. In this embodiment, the alarm levels include a first alarm level and a second alarm level. The first alarm level is set for an error that requires the work machine 1 to be stopped. The second alarm level is set for an error that does not require the work machine 1 to be stopped. Therefore, when only errors of the second alarm level have occurred, the worker may continue working with the work machine 1. The second alarm level is set for an error that has a lower priority than an error for which the first alarm level is set.

[0050] 5 shows an alarm mark image 620 corresponding to the first alarm level. Hereinafter, the alarm mark image 620 corresponding to the first alarm level may be referred to as a "first alarm mark image 620a." The third controller 93 displays the first alarm mark image 620a in the alarm display area 513 when at least one error of the first alarm level has occurred in the work machine 1. Therefore, the display of the first alarm mark image 620a on the home screen 510 (alarm display area 513) enables the operator to visually recognize that an error of the first alarm level has occurred in the work machine 1.

[0051] In this embodiment, the error notification image includes an image of the background color of the alarm display area 513. The third controller 93 determines the background color of the alarm display area 513 according to the alarm level. In other words, the third controller 93 changes the background color of the alarm display area 513 according to the alarm level. Specifically, when a first alarm level error has occurred, the background color of the alarm display area 513 is determined to be "red." Therefore, the operator can visually recognize from the background color of the alarm display area 513 that a first alarm level error has occurred in the work machine 1.

[0052] The first alarm mark image 620a is composed of a mark image 621a and a graphic image 622a. The mark image 621a is arranged inside the graphic image 622a. The outline of the graphic image 622a and the mark image 621a are white, and the color inside the graphic image 622a (background color) is red. In this embodiment, the mark image 621a is a character string image indicating "STOP."

[0053] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 5. As shown in Fig. 5, the third controller 93 displays a selection item T2 in the first selection item display area 511 based on the alarm information. The selection item T2 is an item selected when transitioning the screen displayed on the display unit 91 from the home screen 510 to an error information screen 520 which will be described with reference to Fig. 9. By displaying the selection item T2 in the first selection item display area 511, the operation unit 92 can receive an instruction to transition to the error information screen 520.

[0054] In detail, when the third controller 93 displays the selection item T2 in the first selection item display area 511, it assigns a function of accepting an instruction to select the selection item T2 to one of the first operation switch 921 to the sixth operation switch 926. In this embodiment, the selection item T2 is displayed instead of the selection item T1 described with reference to Fig. 4. Therefore, the sixth operation switch 926 is assigned a function of accepting an instruction to select the selection item T2.

[0055] Specifically, the third controller 93 displays the alarm mark image 620 as the selection item T2. Therefore, the third controller 93 assigns to the sixth operation switch 926 a function of receiving an instruction to select the alarm mark image 620. Hereinafter, an instruction to select the alarm mark image 620 may be referred to as an "alarm mark selection instruction." In the example shown in Fig. 5, the alarm mark image 620 is the first alarm mark image 620a.

[0056] In this way, by displaying the alarm mark image 620 as the selection item T2, the operator can more easily recognize the operation switch for transitioning to the error information screen 520. Furthermore, by displaying the first alarm mark image 620a as the selection item T2, the operator can visually recognize that a first alarm level error has occurred in the work machine 1.

[0057] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 6. Fig. 6 is another diagram showing the display device 9 displaying an error message 610 and an alarm mark image 620. In detail, Fig. 6 shows the home screen 510 displayed on the display device 9 when only errors of the second alarm level have occurred.

[0058] As shown in Fig. 6, when only errors of the second alarm level have occurred, the third controller 93 displays an alarm mark image 620 corresponding to the second alarm level in the alarm display area 513. Hereinafter, the alarm mark image 620 corresponding to the second alarm level may be referred to as a "second alarm mark image 620b". According to this embodiment, when only errors of the second alarm level have occurred, the second alarm mark image 620b is displayed in the alarm display area 513. Therefore, by displaying the second alarm mark image 620b on the home screen 510 (alarm display area 513), the operator can visually recognize that the only errors occurring in the work machine 1 are errors of the second alarm level.

[0059] When only second alarm level errors have occurred, the third controller 93 determines the background color of the alarm display area 513 to be "yellow." Therefore, the operator can visually recognize from the background color of the alarm display area 513 that only second alarm level errors have occurred in the work machine 1.

[0060] Furthermore, when only a second alarm level error has occurred, the third controller 93 displays the second alarm mark image 620b as a selection item T2 in the first selection item display area 511. By displaying the second alarm mark image 620b as the selection item T2 in this manner, the operator can visually recognize that only a second alarm level error has occurred in the work machine 1.

[0061] The second alarm mark image 620b is composed of a mark image 621b and a graphic image 622b. The mark image 621b is arranged inside the graphic image 622b. The outline of the graphic image 622b and the mark image 621b are white, and the color inside the graphic image 622b (background color) is yellow. In this embodiment, the mark image 621b is an exclamation mark.

[0062] As described above, according to this embodiment, the first alarm mark image 620a or the second alarm mark image 620b is displayed on the home screen 510 (the alarm display area 513 and the first selection item display area 511) depending on the alarm level. Therefore, the operator can easily understand the urgency of the error that has occurred in the work machine 1.

[0063] Furthermore, according to this embodiment, the background color of the alarm display area 513 can be changed according to the alarm level. Therefore, the operator can easily understand the urgency of the error that has occurred in the work machine 1.

[0064] Furthermore, according to this embodiment, when multiple errors have occurred in the work machine 1, the third controller 93 displays an alarm mark image 620 on the home screen 510 (alarm display area 513 and first selection item display area 511) based on alarm information with a higher priority. Specifically, when an error for which a first alarm level is set and an error for which a second alarm level is set have occurred in the work machine 1, the third controller 93 displays a first alarm mark image 620a on the home screen 510 (alarm display area 513 and first selection item display area 511). Therefore, the operator can easily understand that an error with a high priority (urgency) has occurred in the work machine 1.

[0065] Furthermore, according to this embodiment, the first selection item display area 511 is arranged at the bottom of the home screen 510, and the alarm display area 513 is arranged at the top of the home screen 510. Then, status quantities of the work machine 1 such as the remaining fuel amount, coolant temperature, hydraulic oil temperature, etc. are displayed between the first selection item display area 511 and the alarm display area 513. Therefore, even if an error notification image (an error message 610, an alarm mark image 620, and an image in the background color of the alarm display area 513) is displayed in the alarm display area 513, the operator can check the status quantities of the work machine 1 such as the remaining fuel amount, coolant temperature, hydraulic oil temperature, etc.

[0066] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 8. Fig. 7 is another diagram showing the display device 9 displaying an error message 610 and an alarm mark image 620. In detail, Fig. 7 shows the display device 9 displaying a captured image G on the home screen 510. As described with reference to Fig. 3, the captured image G is an image captured by the imaging device 10, and shows the surrounding environment of the work machine 1 (the environment behind the driver's seat 6).

[0067] 7, the third controller 93 superimposes a captured image G on the home screen 510. Specifically, the captured image G is displayed between the first selection item display area 511 and the alarm display area 513, and is superimposed on a portion of the remaining fuel gauge, the coolant temperature gauge, and the hydraulic oil temperature gauge.

[0068] According to this embodiment, the captured image G is displayed between the first selection item display area 511 and the alarm display area 513, so that even if an error notification image (an error message 610, an alarm mark image 620, and an image in the background color of the alarm display area 513) is displayed in the alarm display area 513, the worker can check the captured image G.

[0069] Fig. 8 is another diagram showing the display device 9 displaying an error message 610 and an alarm mark image 620. In detail, Fig. 8 shows the display device 9 displaying an enlarged captured image GL on the home screen 510. As shown in Fig. 8, the third controller 93 may display an enlarged captured image GL obtained by enlarging a captured image G based on an instruction from an operator.

[0070] When displaying the enlarged captured image GL on the home screen 510, the third controller 93 superimposes an error notification image (an error message 610, an alarm mark image 620, and an image in the background color of the alarm display area 513) on the enlarged captured image GL. Therefore, when the display device 9 displays the enlarged captured image GL, the worker can recognize that an error has occurred in the work machine 1.

[0071] Furthermore, the imaging device 10 is provided so that the worker can check whether there is anyone around the work machine 1. Therefore, the upper area of ​​the captured image G (enlarged captured image GL) is not important. According to this embodiment, the warning display area 513 is placed at the top of the home screen 510. Therefore, the warning display area 513 is placed in the upper area of ​​the enlarged captured image GL. As a result, important areas in the captured image G are not hidden by the warning display area 513, so that work safety can be ensured.

[0072] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 9. Fig. 9 is a diagram showing the display device 9 displaying an error information screen 520. The error information screen 520 is an example of the second screen.

[0073] When the operation unit 92 accepts an instruction to select an alarm mark, the third controller 93 causes the display unit 91 to display the error information screen 520. Specifically, when the selection item T2 (alarm mark image 620) described with reference to Figures 5 and 6 is selected, the third controller 93 causes the display unit 91 to display the error information screen 520. In other words, when the sixth operation switch 926 is pressed while the selection item T2 (alarm mark image 620) is displayed in the first selection item display area 511, the third controller 93 causes the display unit 91 to display the error information screen 520. The error information screen 520 is a screen that shows the details of an error that has occurred in the work machine 1.

[0074] 9, the error information screen 520 has a second selection item display area 521. The second selection item display area 521 displays various selection items T (T11 to T14). Specifically, the second selection item display area 521 displays character images (character string images) or marks indicating the various selection items T (T11 to T14).

[0075] A selection item T11 is displayed in the second selection item display area 521. The selection item T11 is an item that is selected when returning to the home screen 510. When the display unit 91 is displaying the error information screen 520, the first operation switch 921 is assigned a function of selecting the selection item T11. In other words, the third controller 93 assigns to the first operation switch 921 a function of receiving an instruction to transition from the error information screen 520 to the home screen 510.

[0076] When the operation unit 92 receives an instruction to transition from the error information screen 520 to the home screen 510, the third controller 93 displays the home screen 510 on the display unit 91. Specifically, when the worker presses the first operation switch 921, the third controller 93 displays the home screen 510 on the display unit 91. Note that in the following description, the transition from the error information screen 520 to the home screen 510 may be referred to as a "transition to the home screen 510."

[0077] In detail, when the operation unit 92 receives an instruction to transition to the home screen 510, the third controller 93 causes the display unit 91 to display one of the home screens 510 described with reference to FIGS. 5 to 8. Therefore, when returning the screen displayed on the display unit 91 from the error information screen 520 to the home screen 510, the third controller 93 causes the selection item T2 (alarm mark image 620) to be displayed in the first selection item display area 511. As a result, after returning the screen displayed on the display unit 91 from the error information screen 520 to the home screen 510, the worker can cause the error information screen 520 to be displayed on the display unit 91 again.

[0078] Next, the display device 9 will be further described with reference to Figs. 1 to 9. As shown in Fig. 9, the third controller 93 displays error information 700 on the error information screen 520 based on the alarm information. The error information 700 indicates the content of the error that has occurred in the work machine 1. Therefore, the operator can easily recognize the content of the error that has occurred in the work machine 1. Specifically, the error information 700 indicates an error code 701, an error name 702, and an alarm mark image 620. The third controller 93 displays the error code 701, the error name 702, and the alarm mark image 620 in association with each other on the error information screen 520.

[0079] Therefore, according to this embodiment, it is possible to allow the operator to easily recognize the content of the error that has occurred in the work machine 1. In addition, it is possible to allow the operator to easily recognize the warning level of the error that has occurred in the work machine 1.

[0080] When multiple errors have occurred in the work machine 1, the third controller 93 displays a list of the error information 700 on the error information screen 520. Therefore, the worker can easily recognize the content of each of the multiple errors.

[0081] FIG. 9 shows an example in which five pieces of error information 700 are displayed on the error information screen 520. Specifically, the first error information 710 to the fifth error information 750 are displayed on the error information screen 520. More specifically, the error information screen 520 has a first error information display area 522 to a fifth error information display area 526. The first error information display area 522 to the fifth error information display area 526 are disposed above the second selection item display area 521. The first error information display area 522 to the fifth error information display area 526 are arranged in this order toward the second selection item display area 521. The third controller 93 causes the first error information 710 to the fifth error information 750 to be displayed in the first error information display area 522 to the fifth error information display area 526, respectively.

[0082] In the example shown in FIG. 9, the first error information 710 and the second error information 720 indicate the first warning level, and the third error information 730 to the fifth error information 750 indicate the second warning level. As shown in FIG. 9, the third controller 93 displays a plurality of pieces of error information 700 collectively by warning level. Therefore, according to this embodiment, the operator can easily recognize the warning level of the error occurring in the work machine 1. The third controller 93 arranges the plurality of pieces of error information 700 having the same warning level in the order in which the errors occurred. In the example shown in FIG. 9, the first error information 710 and the second error information 720 are arranged in the order in which the errors occurred. Similarly, the third error information 730 to the fifth error information 750 are arranged in the order in which the errors occurred.

[0083] 9, the third controller 93 displays error information 700 indicating a first warning level above error information 700 indicating a second warning level. That is, the third controller 93 displays error information 700 with a higher warning level above error information 700 with a lower warning level. In this manner, the third controller 93 displays multiple pieces of error information 700 in descending order from the error information 700 with the highest warning level. Therefore, according to this embodiment, it is possible to allow the operator to easily recognize the warning level of an error that has occurred in the work machine 1.

[0084] Furthermore, the third controller 93 determines the background colors of the first error information display area 522 to the fifth error information display area 526 based on the warning level indicated by the error information 700 to be displayed in the first error information display area 522 to the fifth error information display area 526. For example, the third controller 93 determines the background color of the area displaying the error information 700 indicating the first warning level to be red, and determines the background color of the area displaying the error information 700 indicating the second warning level to be yellow. In the example shown in Fig. 9, the background colors of the first error information display area 522 and the second error information display area 523 are red, and the background colors of the third error information display area 524 to the fifth error information display area 526 are yellow.

[0085] In this way, by changing the background colors of the first error information display area 522 to the fifth error information display area 526 according to the warning level indicated by the error information 700 displayed in the first error information display area 522 to the fifth error information display area 526, it is possible to allow the operator to easily recognize the warning level of the error that has occurred in the work machine 1. The first error information display area 522 to the fifth error information display area 526 are one example of a partitioned area.

[0086] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 9. As shown in Fig. 9, the third controller 93 displays a cursor 705 on the error information screen 520. The cursor 705 designates the error information 700. In the example shown in Fig. 9, the cursor 705 designates the first error information 710.

[0087] 9, selection items T12 to T14 are further displayed in second selection item display area 521. Selection item T12 is an item selected when cursor 705 is moved downward. Selection item T13 is an item selected when cursor 705 is moved upward. Selection item T14 is an item selected when error information details screen 530, which will be described with reference to FIG. 8, is displayed.

[0088] When the display unit 91 is displaying the error information screen 520, a function of receiving an instruction to select the selection item T12 is assigned to the third operation switch 923. Therefore, when the operator presses the third operation switch 923, the third controller 93 moves the cursor 705 to the position one step below.

[0089] When the display unit 91 is displaying the error information screen 520, a function of receiving an instruction to select the selection item T13 is assigned to the fourth operation switch 924. Therefore, when the operator presses the fourth operation switch 924, the third controller 93 moves the cursor 705 to the next higher position.

[0090] When the display unit 91 is displaying the error information screen 520, the sixth operation switch 926 is assigned a function of receiving an instruction to select the selection item T14. Therefore, when the worker presses the sixth operation switch 926, the third controller 93 transitions the screen displayed on the display unit 91 from the error information screen 520 to an error information details screen 530, which will be described with reference to Fig. 8. In detail, when the sixth operation switch 926 is pressed, the third controller 93 causes the display unit 91 to display a screen that displays details of the error information 700 designated by the cursor 705.

[0091] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 10. Fig. 10 is a diagram showing the display device 9 displaying an error information details screen 530. As shown in Fig. 10, the third controller 93 causes the display unit 91 to display the error information details screen 530 based on the alarm information.

[0092] The error information details screen 530 displays the warning mark image 620, an error code 701, an error name 702, and detailed information 703. The detailed information 703 indicates how to deal with the error.

[0093] The error information details screen 530 has a third selection item display area 531. In this embodiment, a selection item T21 is displayed in the third selection item display area 531. The selection item T21 is an item that is selected when returning to the error information screen 520.

[0094] When the display unit 91 is displaying the error information details screen 530, a function of receiving an instruction to select the selection item T21 is assigned to the first operation switch 921. Therefore, when the worker presses the first operation switch 921, the third controller 93 causes the display unit 91 to display the error information screen 520.

[0095] As described above with reference to Figs. 1 to 10, according to this embodiment, the operator can check the contents of the error without performing complicated operations. Specifically, according to this embodiment, when an error occurs in the work machine 1, the third controller 93 displays a selection item T2 (alarm mark image 620) in the first selection item display area 511 of the home screen 510. The selection item T2 is an item that transitions the screen displayed by the display unit 91 from the home screen 510 to the error information screen 520. Furthermore, when the third controller 93 displays the selection item T2 in the first selection item display area 511, the third controller 93 assigns to the operation unit 92 a function of receiving an instruction to select the selection item T2. Specifically, the function of receiving an instruction to select the selection item T2 is assigned to an operation switch located below the selection item T2 in a plan view. Therefore, when an error occurs in the work machine 1, the operator can display the error information screen 520 on the display unit 91 by simply operating the operation unit 92 once. Therefore, the operator can check the contents of the error without performing complicated operations.

[0096] In this embodiment, a character string image indicating "Error Occurring" is exemplified as the error message 610, but the error message 610 is not limited to "Error Occurring." Other examples of the error message 610 will be described below with reference to Figs. 11(a) and 11(b).

[0097] Fig. 11(a) is a diagram showing another example 1 of the error message 610. Fig. 11(b) is a diagram showing another example 2 of the error message 610. As shown in Fig. 11(a), the error message 610 may be an image of characters indicating "Filter regeneration". Also, as shown in Fig. 11(b), the error message 610 may be an image of characters indicating "Overload".

[0098] "Filter regeneration" is a message that informs the operator that it is necessary to regenerate the DPF (Diesel Particulate filter). Specifically, the work machine 1 further includes a DPF and a differential pressure sensor. The DPF is a particulate removal filter that collects diesel particulates from the exhaust gas discharged from the engine 12. The differential pressure sensor measures the difference in exhaust pressure between before and after the DPF. The first controller 11 determines whether or not it is necessary to perform processing to regenerate the DPF, based on the measurement value of the differential pressure sensor. The DPF regeneration processing is a process for burning soot (diesel particulates) that has accumulated in the DPF.

[0099] "OVERLOAD" is a message that informs the operator that the load acting on the boom 3 is an overload. Specifically, the work machine 1 is further equipped with a pressure sensor that measures the pressure of the hydraulic oil supplied to the boom actuator 30 or the pressure of the hydraulic oil discharged from the boom actuator 30. The first controller 11 determines whether or not the load acting on the boom 3 is an overload, based on the measurement value of the pressure sensor.

[0100] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 11(b)). However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. Furthermore, the components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in one embodiment may be added to the components of another embodiment, or some of all the components shown in one embodiment may be deleted from the embodiment.

[0101] The drawings are mainly schematic illustrations of each component to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

[0102] For example, in the embodiment described with reference to Figures 1 to 11(b), the work machine 1 is a backhoe, but the work machine 1 is not limited to a backhoe. The work machine 1 may be any machine equipped with a display device.

[0103] In the embodiment described with reference to Figs. 1 to 11(b), the operation unit 92 includes a plurality of operation switches (first operation switch 921 to sixth operation switch 926), but the operation unit 92 is not limited to a plurality of operation switches. For example, the operation unit 92 may include a touch sensor. The touch sensor may be superimposed on the display surface of the display unit 91. Alternatively, the operation unit 92 may include a jog dial.

[0104] Furthermore, in the embodiment described with reference to Figures 1 to 11(b), the first controller 11 detects an error and creates warning information, but the second controller 13 may detect an error and create warning information, or the third controller 93 may detect an error and create warning information.

[0105] 1 to 11(b), the work machine 1 is equipped with one imaging device 10, but the work machine 1 may be equipped with multiple imaging devices 10. Specifically, the work machine 1 may be equipped with at least one of an imaging device that images an image to the left rear of the driver's seat 6 and an imaging device that images an image to the right rear of the driver's seat 6, in addition to an imaging device that images an image to the right rear of the driver's seat 6.

[0106] Furthermore, in the embodiment described with reference to FIGS. 1 to 11(b), the home screen 510 has the alarm display area 513, but the alarm display area 513 may be omitted.

[0107] Furthermore, in the embodiment described with reference to Figures 1 to 11(b), the third controller 93 changes one of the selection items T displayed in the first selection item display area 511 to selection item T2, but as shown in Figure 12, a specific area 514 for displaying selection item T2 may be provided in the first selection item display area 511.

[0108] A modified example of the display device 9 of this embodiment will be described below with reference to Fig. 12. Fig. 12 is a diagram showing a modified example of the display device 9 of this embodiment. In detail, Fig. 12 shows a modified example of the home screen 510 that the display device 9 displays before alarm information is transmitted from the first controller 11 to the third controller 93.

[0109] 12 has a specific area 514 in a first selection item display area 511. If the first controller 11 has not detected the occurrence of an error, the selection item T is not displayed in the specific area 514. Upon receiving alarm information from the first controller 11, the third controller 93 displays the selection item T2 in the specific area 514. [Industrial Applicability]

[0110] The present invention is useful for a display device and a work machine. [Explanation of symbols]

[0111] 1: Work machine 9:Display device 91:Display section 92: Operation section 93: Third Controller 510: Home screen 511: First selection item display area 513:Second notification area (alarm display area) 520: Error information screen 522: First error information display area 523: Second error information display area 524: Third error information display area 525: Fourth error information display area 526: Fifth error information display area 610: Error message 620: Warning mark image 620a: First alarm mark image 620b: Second warning mark image 700: Error information 921: First operation switch 922: Second operation switch 923: 3rd operation switch 924: 4th operation switch 925: 5th operation switch 926: 6th operation switch T: Selection item T2: Selection item

Claims

1. Displaying an alarm mark image indicating that an error has occurred in a work machine in a notification area of ​​a display unit of a display device which displays information related to the work machine; and displaying a first alarm mark image relating to the error in the selection item display area of ​​the display unit in place of the selection item displayed in the selection item display area of ​​the display unit, together with displaying the alarm mark image in the notification area, the selection item corresponds to an instruction related to display control of the display device, which is received by an operation unit of the display device and is given to a controller of the display device; A method for controlling a display device.

2. The method for controlling a display device according to claim 1 , wherein the instruction, together with the display of the first alarm mark image, is changed to another instruction for the controller, which is an instruction relating to display control of the display device.

3. The method of controlling a display device according to claim 2 , wherein the other instruction causes the display unit to display a screen showing the content of the error.

4. The method of controlling a display device according to claim 3 , wherein the instruction causes the display unit to display a screen different from a screen showing the content of the error.

5. The method for controlling a display device according to claim 1 , wherein the selection items are arranged adjacent to an outer edge of the display unit and facing the operation unit.

Images