Control method of display device

Abstract

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.SOLUTION: A control method of a display device 9 includes: detecting an error related to a work machine and outputting alarm information; and, together with outputting the alarm information, displaying an alarm mark image 620 corresponding to the alarm information in a selection item display area 511 of a display portion 91 of a display device 9 which displays relating to the work machine, instead of the selection item T displayed in the selection item display area 511.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for controlling a display device.

Background Art

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

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the display device of Patent Document 1, an operator needs to display a menu screen from the basic screen and display a warning list screen from the menu screen. Therefore, the operator needs to perform complicated operations to confirm the content of the warning.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a method for controlling a display device that can confirm the content of an error without performing complicated operations.

Means for Solving the Problems

[0006] The control method of a display device according to an aspect of the present invention includes detecting an error related to a work machine and outputting warning information, and displaying a warning mark image corresponding to the warning information in a selection item display area of a display unit of a display device that displays a display related to the work machine together with the output of the warning information, instead of the selection item displayed in the selection item display area.

Advantages of the Invention

[0007] According to the present invention, it is possible to check the content of an error without performing complicated operations.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the display device and the working machine according to 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 embodiments. In addition, the description may be omitted as appropriate for overlapping parts. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description thereof will not be repeated.

[0010] First, the working machine 1 of the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a side view of the working machine 1 of the present embodiment. As shown in FIG. 1, the working machine 1 of the present embodiment is a backhoe. A backhoe is a type of construction machine. The working machine 1 of the present embodiment includes a machine body 2, a boom 3, an arm 4, a bucket 5, and a traveling device 7. The working machine 1 of the present embodiment further includes 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 on the driver's seat 6 and operates the working machine 1. The machine body 2 is supported by the traveling device 7. The machine body 2 may be supported by the traveling device 7 so as to be 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. Further, the machine body 2 is provided with a bonnet for housing the engine 12 (see FIG. 3), the fuel tank, the battery, the hydraulic system, and the hydraulic oil tank, and the driver's seat 6 is disposed on the bonnet.

[0012] The boom 3 is swingably supported by the machine body 2 about a first pivot point P1. Specifically, the base end portion of the boom 3 is pivotally supported by the machine body 2. The first pivot point P1 is a rotation axis extending along the left-right direction when viewed from the front of the driver's seat 6. Hereinafter, the left-right direction when viewed from the front of the driver's seat 6 may be referred to as the "left-right direction".

[0013] The boom actuator 30 actuates the boom 3. Specifically, as the boom actuator 30 expands and contracts, the boom 3 swings about the first pivot point P1. More specifically, the boom actuator 30 is expanded and contracted 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 expands and contracts by hydraulic oil.

[0014] The arm 4 is swingably supported by the boom 3 about the second pivot point P2. Specifically, the base end portion of the arm 4 is pivotally supported at the tip end portion of the boom 3. The second pivot point P2 is a rotating shaft extending along the left - right direction.

[0015] The arm actuator 40 actuates the arm 4. Specifically, as the arm actuator 40 expands and contracts, the arm 4 swings about the second pivot point P2. More specifically, the arm actuator 40 is expanded and contracted 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 expands and contracts by hydraulic oil.

[0016] The bucket 5 is a type of attachment. The bucket 5 is swingably supported by the arm 4 about the third pivot point P3. Specifically, the bucket 5 is pivotally supported at the tip end portion of the arm 4. The third pivot point P3 is a rotating shaft extending along the left - right direction.

[0017] The attachment actuator 50 actuates the bucket 5. Specifically, as the attachment actuator 50 expands and contracts, the bucket 5 swings about the third pivot point P3. Specifically, the attachment actuator 50 is expanded and contracted 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 expands and contracts by hydraulic oil.

[0018] The traveling device 7 travels the work machine 1. In the present embodiment, the traveling device 7 is a crawler-type traveling device.

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

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

[0021] The operation unit 8 includes various operation members for an operator to operate the work machine 1. The various operation members include a boom operation lever 81 and an arm operation lever 82. The operator operates the boom operation lever 81 and the arm operation lever 82 by hand. The operator can operate the boom operation lever 81 to actuate the boom 3. Also, the operator can operate the arm operation lever 82 to actuate the arm 4.

[0022] The display device 9 displays various screens. Specifically, as will be described later with reference to FIGS. 4 to 8 and the like, the display device 9 displays a home screen 510. Also, as will be described later with reference to FIGS. 9 and the like, the display device 9 displays an error information screen 520. Further, as will be described later with reference to FIGS. 10 and the like, the display device 9 displays an error information detail screen 530.

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

[0024] The imaging device 10 captures the surrounding environment of the working machine 1 and generates a captured image G (video). Specifically, the imaging device 10 captures the area behind the driver's seat 6. The captured image G is displayed by the display device 9. Specifically, when the prohibition of the operation of the working machine 1 is released, the first controller 11 instructs the display device 9 to display the captured image G. Specifically, when the first controller 11 detects that the cutoff lever that prohibits the operation of the working machine 1 is lowered while the engine 12 is keyed on, the first controller 11 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 a command 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 a processor that executes various operations such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). Alternatively, the processing unit may be configured by a general-purpose arithmetic unit. 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] The operator manually operates the accelerator volume 85. The accelerator volume 85 is electrically connected to the second controller 13. When the operator rotates the accelerator volume 85 forward and backward, the rotational speed of the engine 12 increases and 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 fuel injection amount and injection timing to the engine 12 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 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 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 in the engine 12. The first controller 11 determines whether 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 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 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 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 constituted 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. Specifically, the warning information includes information indicating the error name, information indicating the error code, and information indicating the warning level. In addition, the warning information includes information indicating a countermeasure method for the error. The error name, error code, warning level, and countermeasure method for the error are preset for each error that is assumed to occur in the work machine 1. In the present embodiment, the first controller 11 is an example of a transmission 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 temperature of the cooling water detected by the coolant temperature sensor 102 indicates an abnormal value (outlier), it transmits warning information to the display device 9. Further, when the first controller 11 determines that the temperature of the hydraulic oil 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 constituted by a display such as a liquid crystal display or an organic EL display, for example. The display unit 91 displays an image indicating that an error has occurred based on the warning information. Specifically, the third controller 93 causes the display unit 91 to display an image indicating that an error has occurred based on the warning information. Hereinafter, an 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 causes the display unit 91 to display various screens based on the 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 constituted by, for example, 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 FIGS. 1 to 10. FIG. 4 is a diagram showing the display device 9 of the present embodiment. Specifically, FIG. 4 shows the display device 9 displaying the home screen 510. The home screen 510 is an example of the 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 the 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, character images (string images) or marks indicating the various selection items T are displayed in the first selection item display area 511. The mark is, for example, an icon, a figure, or an emoji. The first selection item display area 511 is arranged at the lower part of the home screen 510.

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

[0042] The first operation switches 921 to sixth operation switches 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 switches 921 to sixth operation switches 926 are assigned a function of receiving an instruction to select one corresponding to the selection items T displayed in the first selection item display area 511. That is, each of the first operation switches 921 to sixth operation switches 926 receives an instruction to select the corresponding selection item T. The first operation switches 921 to sixth operation switches 926 are each arranged 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 item T includes the selection item T1, and the sixth operation switch 926 is assigned a function of receiving an instruction to select the selection item T1. The selection item T1 is an item for switching the information displayed in the first notification area 512. For example, each time the operator presses the sixth operation switch 926, the third controller 93 switches the information displayed in the first notification area 512 between the information indicating the rotational speed of the engine 12 and the information indicating the remaining fuel amount.

[0044] According to the present embodiment, the operation unit 92 includes hard keys (the first operation switch 921 to the sixth operation switch 926). Therefore, the operator can operate the operation unit 92 while wearing protective gear such as work gloves. Further, according to the present embodiment, the first operation switch 921 to the sixth operation switch 926 are each arranged below the corresponding selection item T in a plan view. Therefore, the operator can easily grasp the relationship between each of the first operation switch 921 to the sixth operation switch 926 and each selection item T. As a result, the operator 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 arranged at the upper part of the home screen 510. When the first controller 11 detects the occurrence of an error, the third controller 93 causes an error message 610 and an alarm mark image 620, which will be described with reference to FIG. 5 and the like, to be displayed in the second notification area 513. That is, when the third controller 93 receives alarm information from the first controller 11, the third controller 93 causes the error message 610 and the alarm mark image 620 to be displayed in the second notification area 513.

[0046] FIG. 4 shows the home screen 510 displayed on the display unit 91 when the first controller 11 does not detect the occurrence of an error. Therefore, the error message 610 and the 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 the "alarm display area 513".

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

[0048] The error message 610 is a string image indicating that an error has occurred. For example, as shown in FIG. 5, the error message 610 is a string image indicating "Error occurring". The error message 610 is an example of a predetermined message. According to the present embodiment, since the string image (the error message 610) indicating that an error has occurred is displayed on the home screen 510 (the warning display area 513), the operator can easily understand that an error has occurred in the working machine 1.

[0049] The warning mark image 620 is a mark image indicating that an error has occurred. Specifically, the warning mark image 620 indicates the warning level. The mark image is, for example, an icon, a figure, or an emoji. In the present embodiment, the warning level includes a first warning level and a second warning level. The first warning level is set for an error that requires the working machine 1 to be stopped. The second warning level is set for an error that does not require the working machine 1 to be stopped. Therefore, when only an error of the second warning level has occurred, the operator may continue the work by the working machine 1. The second warning level is set for an error with a lower priority compared to the error for which the first warning level is set.

[0050] FIG. 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 the "first alarm mark image 620a". When at least one error of the first alarm level has occurred in the working machine 1, the third controller 93 causes the first alarm mark image 620a to be displayed in the alarm display area 513. Therefore, the operator can visually recognize that an error of the first alarm level has occurred in the working machine 1 when the first alarm mark image 620a is displayed on the home screen 510 (alarm display area 513).

[0051] In the present 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 an error of the first alarm level has occurred, the background color of the alarm display area 513 is determined to be "red". Therefore, the operator can visually recognize that an error of the first alarm level has occurred in the working machine 1 from the background color of the alarm display area 513.

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

[0053] Next, the display device 9 will be further described with reference to FIGS. 1 to 5. As shown in FIG. 5, the third controller 93 causes the selection item T2 to be displayed in the first selection item display area 511 based on the warning 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 the error information screen 520 described with reference to FIG. 9. When the selection item T2 is displayed 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] Specifically, when the third controller 93 displays the selection item T2 in the first selection item display area 511, it assigns a function of receiving 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, instead of the selection item T1 described with reference to FIG. 4, the selection item T2 is displayed. Therefore, a function of receiving an instruction to select the selection item T2 is assigned to the sixth operation switch 926.

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

[0056] In this way, by displaying the warning 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. Also, by displaying the first warning mark image 620a as the selection item T2, the operator can visually recognize that an error of the first warning level has occurred in the working machine 1.

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

[0058] As shown in FIG. 6, when only errors of the second warning level have occurred, the third controller 93 causes the warning mark image 620 corresponding to the second warning level to be displayed in the warning display area 513. Hereinafter, the warning mark image 620 corresponding to the second warning level may be referred to as the "second warning mark image 620b". According to the present embodiment, when only errors of the second warning level have occurred, the second warning mark image 620b is displayed in the warning display area 513. Therefore, the operator can visually recognize that only errors of the second warning level have occurred in the working machine 1 by the second warning mark image 620b being displayed on the home screen 510 (warning display area 513).

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

[0060] In addition, when only errors of the second warning level have occurred, the third controller 93 causes the second warning mark image 620b to be displayed as the selection item T2 in the first selection item display area 511. By thus displaying the second warning mark image 620b as the selection item T2, the operator can be visually made to recognize that only errors of the second warning level have occurred in the working machine 1.

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

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

[0063] Also, according to this embodiment, the background color of the warning display area 513 can be changed according to the warning level. Therefore, the operator can easily understand the urgency of the error occurring in the working machine 1.

[0064] Also, according to this embodiment, when a plurality of errors occur in the working machine 1, the third controller 93 causes the warning mark image 620 to be displayed on the home screen 510 (warning display area 513 and first selection item display area 511) based on the warning information with a higher priority. Specifically, when an error with the first warning level set and an error with the second warning level set occur in the working machine 1, the first warning mark image 620a is displayed on the home screen 510 (warning display area 513 and first selection item display area 511). Therefore, the operator can easily grasp that an error with a high priority (urgency) has occurred in the working machine 1.

[0065] Further, according to the present embodiment, the first selection item display area 511 is arranged at the lower part of the home screen 510, and the warning display area 513 is arranged at the upper part of the home screen 510. And the state quantities of the working machine 1 such as the remaining fuel amount, the coolant water temperature, and the hydraulic oil temperature are displayed between the first selection item display area 511 and the warning display area 513. Therefore, even if an error notification image (error message 610, warning mark image 620, and an image of the background color of the warning display area 513) is displayed in the warning display area 513, the operator can check the state quantities of the working machine 1 such as the remaining fuel amount, the coolant water temperature, and the hydraulic oil temperature.

[0066] Subsequently, the display device 9 will be further described with reference to FIGS. 1 to 8. FIG. 7 is another view showing the display device 9 displaying the error message 610 and the warning mark image 620. Specifically, FIG. 7 shows the display device 9 displaying the captured image G on the home screen 510. The captured image G is an image captured by the imaging device 10 as described with reference to FIG. 3, and shows the surrounding environment of the working machine 1 (the environment behind the driver's seat 6).

[0067] As shown in FIG. 7, the third controller 93 superimposes the 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 warning display area 513 and is superimposed on a part of the remaining fuel gauge, the coolant water temperature gauge, and the hydraulic oil temperature gauge.

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

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

[0070] When the enlarged imaging image GL is to be displayed on the home screen 510, the third controller 93 superimposes and displays an error notification image (an error message 610, a warning mark image 620, and an image of the background color of the warning display area 513) on the enlarged imaging image GL. Therefore, the operator can recognize that an error has occurred in the working machine 1 when the display device 9 is displaying the enlarged imaging image GL.

[0071] In addition, the imaging device 10 is provided for the operator to check whether there are people around the working machine 1. Therefore, the upper area of the imaging image G (enlarged imaging image GL) is not important. According to the present embodiment, a warning display area 513 is arranged at the upper part of the home screen 510. Therefore, the warning display area 513 is arranged in the upper area of the enlarged imaging image GL. As a result, since the important area in the imaging image G is not hidden by the warning display area 513, the safety of the work can be ensured.

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

[0073] When the operation unit 92 receives an alarm mark selection instruction, the third controller 93 causes the display unit 91 to display an error information screen 520. Specifically, when the selection item T2 (alarm mark image 620) described with reference to FIGS. 5 and 6 is selected, the third controller 93 causes the display unit 91 to display the error information screen 520. That is, 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 showing the content of the error occurring in the working machine 1.

[0074] As shown in FIG. 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, character images (string images) or marks indicating various selection items T (T11 to T14) are displayed in the second selection item display area 521.

[0075] The selection item T11 is displayed in the second selection item display area 521. The selection item T11 is an item 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. That is, 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 causes the display unit 91 to display the home screen 510. Specifically, when the operator presses the first operation switch 921, the third controller 93 causes the display unit 91 to display the home screen 510. In the following description, the transition from the error information screen 520 to the home screen 510 may be referred to as "transition to the home screen 510".

[0077] Specifically, 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 any one of the home screens 510 described with reference to FIGS. 5 to 8. Therefore, when the third controller 93 returns 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 the operator returns the screen displayed on the display unit 91 from the error information screen 520 to the home screen 510, the operator can again cause the error information screen 520 to be displayed on the display unit 91.

[0078] Subsequently, the display device 9 will be further described with reference to FIGS. 1 to 9. As shown in FIG. 9, the third controller 93 causes the error information 700 to be displayed on the error information screen 520 based on the alarm information. The error information 700 indicates the content of the error occurring in the working machine 1. Therefore, the operator can easily recognize the content of the error occurring in the working 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 causes the error code 701, the error name 702, and the alarm mark image 620 to be displayed in association with each other on the error information screen 520.

[0079] Therefore, according to the present embodiment, the content of the error occurring in the working machine 1 can be easily recognized by the operator. In addition, the alarm level of the error occurring in the working machine 1 can be easily recognized by the operator.

[0080] When a plurality of errors occur in the working machine 1, the third controller 93 causes the error information 700 to be displayed in a list on the error information screen 520. Therefore, the operator can easily recognize the content of each of the plurality of errors.

[0081] FIG. 9 shows an example in which five error messages 700 are displayed on the error information screen 520. Specifically, on the error information screen 520, the first error message 710 to the fifth error message 750 are displayed. 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 arranged 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 message 710 to the fifth error message 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 message 710 and the second error message 720 indicate the first warning level, and the third error message 730 to the fifth error message 750 indicate the second warning level. As shown in FIG. 9, the third controller 93 collectively displays a plurality of error messages 700 for each warning level. Therefore, according to the present embodiment, the warning level of the error occurring in the working machine 1 can be easily recognized by the operator. Note that the third controller 93 arranges a plurality of error messages 700 having the same warning level in the order of occurrence of the errors. In the example shown in FIG. 9, the first error message 710 and the second error message 720 are arranged in the order of occurrence of the errors. Similarly, the third error message 730 to the fifth error message 750 are arranged in the order of occurrence of the errors.

[0083] Also, as shown in FIG. 9, the third controller 93 causes the error message 700 indicating the first warning level to be displayed above the error message 700 indicating the second warning level. That is, the third controller 93 causes the error message 700 with a higher warning level to be displayed above the error message 700 with a lower warning level. In this way, the third controller 93 displays a plurality of error messages 700 in descending order from the error message 700 with a higher warning level. Therefore, according to the present embodiment, the warning level of the error occurring in the working machine 1 can be easily recognized by the operator.

[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 for displaying the error information 700 indicating the first warning level to be red, and determines the background color of the area for 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 to be displayed in the first error information display area 522 to the fifth error information display area 526, the warning level of the error occurring in the working machine 1 can be easily recognized by the operator. The first error information display area 522 to the fifth error information display area 526 are an example of partitioned areas.

[0086] Subsequently, the display device 9 will be further described with reference to FIGS. 1 to 9. As shown in FIG. 9, the third controller 93 causes a cursor 705 to be displayed on the error information screen 520. The cursor 705 designates the error information 700. In the example shown in FIG. 9, the first error information 710 is designated by the cursor 705.

[0087] Also, as shown in FIG. 9, selection items T12 to T14 are further displayed in the second selection item display area 521. The selection item T12 is the item selected when the cursor 705 is moved downward. The selection item T13 is the item selected when the cursor 705 is moved upward. The selection item T14 is the item selected when the error information details screen 530 described with reference to FIG. 8 is displayed.

[0088] When the display unit 91 is displaying the error information screen 520, the third operation switch 923 is assigned a function of receiving an instruction to select the selection item T12. 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, the fourth operation switch 924 is assigned a function of receiving an instruction to select the selection item T13. Therefore, when the operator presses the fourth operation switch 924, the third controller 93 moves the cursor 705 to the position one step above.

[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 operator presses the sixth operation switch 926, the third controller 93 causes the screen displayed on the display unit 91 to transition from the error information screen 520 to the error information detail screen 530 described with reference to FIG. 8. Specifically, when the sixth operation switch 926 is pressed, the third controller 93 causes the display unit 91 to display a screen that displays the details of the error information 700 specified by the cursor 705.

[0091] Subsequently, the display device 9 will be further described with reference to FIGS. 1 to 10. FIG. 10 is a diagram showing the display device 9 displaying the error information detail screen 530. As shown in FIG. 10, the third controller 93 causes the display unit 91 to display the error information detail screen 530 based on the warning information.

[0092] The error information detail screen 530 displays a warning mark image 620, an error code 701, an error name 702, and detailed information 703. The detailed information 703 indicates a countermeasure method for the error.

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

[0094] When the display unit 91 is displaying the error information details screen 530, the first operation switch 921 is assigned a function of receiving an instruction to select the selection item T21. Therefore, when the operator 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 the present embodiment, the operator can check the error content without performing complicated operations. Specifically, according to the present embodiment, when an error occurs in the working machine 1, the third controller 93 causes the selection item T2 (alarm mark image 620) to be displayed in the first selection item display area 511 of the home screen 510. The selection item T2 is an item that causes the screen displayed by the display unit 91 to transition from the home screen 510 to the error information screen 520. Further, when the third controller 93 displays the selection item T2 in the first selection item display area 511, the operation unit 92 is assigned a function of receiving an instruction to select the selection item T2. Specifically, an operation switch located below the selection item T2 in a plan view is assigned a function of receiving an instruction to select the selection item T2. Therefore, when an error occurs in the working machine 1, the operator can cause the display unit 91 to display the error information screen 520 by operating the operation unit 92 only once. Thus, the operator can check the error content without performing complicated operations.

[0096] In the present embodiment, the character string image indicating "error occurring" is exemplified as the error message 610, but the error message 610 is not limited to "error occurring". Hereinafter, other examples of the error message 610 will be described 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 a character string image indicating "filter regeneration". Further, as shown in FIG. 11(b), the error message 610 may be a character string image indicating "overload".

[0098] "Filter regeneration" is a message to inform 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 exhausted from the engine 12. The differential pressure sensor measures the differential pressure of the exhaust pressure before and after the DPF. The first controller 11 determines whether it is necessary to perform a process of regenerating the DPF based on the measured value of the differential pressure sensor. The DPF regeneration process is a process of burning the soot (diesel particulates) accumulated in the DPF.

[0099] "Overload" is a message to inform the operator that the load acting on the boom 3 is an overload. Specifically, the work machine 1 further includes 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 the load acting on the boom 3 is an overload based on the measured value of the pressure sensor.

[0100] As described above, the embodiments of the present invention have been described with reference to the drawings (FIGS. 1 to 11(b)). However, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the gist thereof. Further, the plurality of 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 the components among all the components shown in one embodiment may be deleted from the embodiment.

[0101] The drawings schematically show each component mainly for facilitating the understanding of the invention. The thickness, length, number, interval, etc. of each illustrated component may be different from the actual ones for convenience in drawing creation. Also, it goes without saying that the configuration of each component shown in the above embodiments is an example and is not particularly limited, and various changes can be made without substantially departing from the effects of the present invention.

[0102] For example, in the embodiment described with reference to FIGS. 1 to 11(b), the work machine 1 was 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] Also, in the embodiment described with reference to FIGS. 1 to 11(b), the operation unit 92 included a plurality of operation switches (the first operation switch 921 to the 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] Also, in the embodiment described with reference to FIGS. 1 to 11(b), the first controller 11 detected an error and created alarm information, but the second controller 13 may detect an error and create alarm information, or the third controller 93 may detect an error and create alarm information.

[0105] Also, in the embodiment described with reference to FIGS. 1 to 11(b), the work machine 1 was equipped with one imaging device 10, but the work machine 1 may be equipped with a plurality of imaging devices 10. Specifically, in addition to the imaging device that images the rear of the driver's seat 6, the work machine 1 may be equipped with at least one of an imaging device that images the left rear of the driver's seat 6 and an imaging device that images the right rear of the driver's seat 6.

[0106] Further, 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] Also, in the embodiment described with reference to FIGS. 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 the selection item T2. However, as shown in FIG. 12, a specific area 514 for displaying the selection item T2 may be provided in the first selection item display area 511.

[0108] Hereinafter, a modified example of the display device 9 of the present embodiment will be described with reference to FIG. 12. FIG. 12 is a diagram showing a modified example of the display device 9 of the present embodiment. Specifically, FIG. 12 shows a modified example of the home screen 510 displayed by the display device 9 before the alarm information is transmitted from the first controller 11 to the third controller 93.

[0109] The home screen 510 shown in FIG. 12 has a specific area 514 in the first selection item display area 511. When the first controller 11 has not detected the occurrence of an error, the selection item T is not displayed in the specific area 514. When the third controller 93 receives the alarm information from the first controller 11, the third controller 93 causes the selection item T2 to be displayed in the specific area 514.

[0110] <Supplementary Note of the Invention> The 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 displays an alarm mark image in the selection item display area based on alarm information indicating that an error has occurred. When the control unit displays the alarm mark image 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.

Industrial Applicability

[0111] The present invention is useful for display devices and work machines.

Explanation of Signs

[0112] 1: Work machine 9: Display device 91: Display unit 92: Operation unit 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: Alarm mark image 620a: First alarm mark image 620b: Second alarm mark image 700: Error information 921: First operation switch 922: Second operation switch 923: Third operation switch 924: Fourth operation switch 925: Fifth operation switch 926: Sixth operation switch T: Selection item T2: Selection item

Claims

1. detecting an error related to a working machine and outputting warning information; while outputting the warning information, replacing a selection item displayed in a selection item display area of a display unit of a display device that displays a display related to the working machine with a warning mark image corresponding to the warning information and displaying the warning mark image in the selection item display area; and a control method for a display device.

2. The selection item is an item corresponding to an instruction related to display control of the display device for a controller of the display device received by an operation unit of the display device, according to the control method for a display device of Claim 1.

3. The instruction is changed to another instruction related to display control of the display device for the controller while displaying the warning mark image, according to the control method for a display device of Claim 2.

4. The other instruction causes the display unit to display a screen showing the content of the error, according to the control method for a display device of Claim 3.

5. The instruction causes the display unit to display a screen different from the screen showing the content of the error, according to the control method for a display device of Claim 4.

Images