JPH09151491A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow easy operation as well as easy confirmation of display. SOLUTION: An LCD panel 2 and operation switches 3 are arranged on the front panel of an operation display device 1. Also, the LCD panel 2 is color active matrix TFT type, and can select the contents of indication between a normal mode and a warning mode. In the normal mode, the LCD panel 2 shows a fuel meter (FUEL) 4, a tachometer 5, a speed meter (SPEED) 6, a clock 7, fuel throttle operation variable (THROTTLE) 8, an hour-meter 9, an engine coolant temperature indicator 10, and work contents (i.e., heavy excavation, excavation, correction, fine operation and breaker) 11. In this case, a frame 1a surrounding the established work contents (e.g. breaker) is indicated in red, and frames 11a around other work contents (heavy excavation, excavation, correction and fine operation) is indicated in white, regarding the work contents 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to an operation display device for industrial vehicles such as construction machines and construction machines.

[0002]

2. Description of the Related Art In recent years, as an operation display device for industrial vehicles,
Liquid Crystal Display (LCD)
Are frequently used. Conventionally, as such an operation display device, a monochrome simple matrix system LCD having a large number of pixels or an LCD displaying only a fixed pattern has been used.

By the way, as the display contents of the operation display device, for example, in the case of an operation display device for a power shovel,
There are vehicle information (fuel gauge, tachometer, speedometer, etc.), work content (heavy excavation, excavation, straightening, etc.), and warning of abnormal conditions (battery voltage abnormality, coolant temperature abnormality, etc.).

[0004]

In a monochrome simple matrix type LCD having a large number of pixels, it is difficult to display Chinese characters, so the work content cannot be written in Chinese characters. In the case of an LCD that displays only a fixed pattern, the LCD panel size is limited.
There is no space to describe work details.

Therefore, in the conventional operation display device using the LCD, the work contents are not displayed on the LCD panel, and the work contents are displayed on the LE arranged adjacent to the LCD panel.
It was done with the indicator by D. Therefore, there is a problem that it is difficult to visually recognize the display content.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a display device for an industrial vehicle in which the displayed contents are easily visible.

[0007]

The gist of the invention described in claim 1 is to display vehicle information and work contents in the normal mode and to display an abnormal condition warning in the warning mode.

[0008] The gist of the invention of claim 2 is to display vehicle information and work contents in the normal mode, and to turn off the display in the normal mode in the warning mode to display a warning of an abnormal state.

According to a third aspect of the present invention, in the display device according to the first or second aspect, the display is an active matrix type TFT type LCD, an active matrix type diode type LCD, an ECB type LC.
The gist is that it is displayed on one display selected from the group consisting of D, ferroelectric LCD, plasma display, plasma addressed LCD, and CRT.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in an operation display device for a power shovel will be described below with reference to the drawings.

1 and 2 show the front panel of the operation display device 1 of this embodiment. The LCD panel 2 and the operation switch 3 are provided on the front panel of the operation display device 1.
Is arranged.

The LCD panel 2 is a color active matrix type TFT (Thin Film Transistor) type LCD.
The display contents can be switched between the normal mode and the warning mode. FIG. 1 shows display contents in the normal mode, and FIG. 2 shows examples of display contents in the warning mode.

In the normal mode, the fuel gauge (FUEL)
4, tachometer 5, speedometer (SPEED) 6, clock 7,
A fuel throttle operation amount (THROTTLE) 8, an hour meter 9, an engine coolant temperature gauge 10, and a work content (heavy excavation, excavation, adjustment, fine operation, breaker) 11 are displayed. As for the work content 11, the frame 11a around the set work content (for example, a breaker) is colored red, and the frame 1 around the other work content (heavy excavation, excavation, adjustment, fine operation).
1a is displayed in white. By the way, what is a breaker?
It refers to the work of cutting a bedrock.

In the warning mode, the display contents (4 to 11) in the normal mode are erased, and warnings of abnormal states (battery voltage abnormality, coolant temperature abnormality, engine oil pressure abnormality, engine oil amount abnormality, etc.) are displayed in large size. . For example, when the battery voltage is abnormal, a mark (illustration) 12 and a warning sentence (for example, “Warning! Battery voltage abnormality”) 13 that represents a battery are displayed in a large size.

The operation switch 3 includes a work content setting switch 21, a fuel throttle operation amount setting switch 22, a traveling speed setting switch 23, and other operation switches 24.
There is. When the work content setting switch 21 is operated, the LCD
When the display of the work content 11 on the panel 2 is switched and the fuel throttle operation amount setting switch 22 is operated, the LCD is displayed.
When the display of the fuel throttle operation amount 8 on the panel 2 is switched and the traveling speed setting switch 23 is operated, LC is displayed.
The display of the speedometer 6 on the D panel 2 is switched.

FIG. 3 shows a block circuit of this embodiment. In the operation display device 1, in addition to the LCD panel 2 and the operation switches 3, a microcomputer is provided.
3, a video control circuit 32, and a ROM (Read Only Memory) 33 for storing image data are provided.

The video control circuit 32 controls the display contents of the LCD panel 2 according to the image data read from the image data storage ROM 33. Microcomputer 3
Reference numeral 1 controls the operation of each part of the vehicle (not shown; for example, a fuel throttle, a power shovel, etc.) based on the operation content of the operation switch 3, and also controls the video control circuit 32 to display the content on the LCD panel 2. Switch. Further, the microcomputer 31 includes various parts of the vehicle (not shown).
When an abnormal state of the vehicle is detected based on detection signals of various sensors (battery voltage sensor, coolant temperature sensor, engine oil pressure sensor, engine oil amount sensor, etc.) provided in the vehicle, the video control circuit 32 is controlled,
As described above, the LCD panel 2 is caused to display the abnormal mode.

FIG. 4 shows the mounting location of the operation display device 1. The operation display device 1 is a driver's seat 41 of a power shovel.
It is fixed to the lower side of the right side window 42. Therefore, seat 4
A driver (not shown) sitting on the vehicle 3 can easily and easily operate the operation display device 1 by releasing the right hand from the operation lever 44 arranged in front of the seat 43.

As described above, according to this embodiment, the following actions and effects can be obtained. The normal mode and the warning mode are switched and displayed on the LCD panel 2. Therefore, various display contents can be displayed sufficiently large without increasing the panel size of the LCD panel 2, and the visibility can be improved.

In the warning mode, the mark 12 and the warning sentence 13 are displayed large on the LCD panel 2, so that the driver's attention can be surely called. Since the high-definition color active matrix type TFT LCD is used for the LCD panel 2, various display contents can be written in Chinese characters. Therefore, one LCD
It becomes possible to display all the display contents on the panel 2, and it is possible to improve the visibility.

The dot matrix LCD has a simple matrix system and an active matrix system. The simple matrix method is a method of directly driving the liquid crystal of each pixel arranged in a matrix from the outside. Since the LCD panel is composed of only the electrodes and the liquid crystal, the structure is simple, but high-definition display is difficult. There are drawbacks.

The active matrix system is a system in which a switch element (pixel control element) and a signal storage element (pixel capacitance) are integrated in each pixel to drive liquid crystal quasi-statically. There are a TFT type using a TFT as a switch element and a diode type using a diode in the active matrix type, and both types can display much higher definition than the simple matrix type. In particular, T
The FT type provides high contrast and halftone, and C
High-quality display comparable to RT can be performed.

The above embodiment may be applied to an operation display device of an industrial vehicle other than a power shovel, and in that case, the same operation and effect can be obtained. Further, in the above-described embodiment, the LCD panel 2 may be replaced with the following high-definition display, and in that case, the same operation and effect can be obtained.

(1) Monochrome active matrix TFT type LCD (2) Monochrome or color active matrix diode LCD (3) Monochrome or color ECB (Electrically C
ontrolled Birefringence) LCD (4) Monochrome or color ferroelectric LCD (5) Monochrome or color plasma display (6) Monochrome or color plasma address LCD (7) C including monochrome or color flat CRT
RT Although the respective embodiments have been described above, technical ideas other than the claims that can be understood from the respective embodiments will be described below together with their effects.

(A) The display device according to any one of claims 1 to 3, wherein a mark indicating a warning content and a warning sentence are displayed in the warning mode. (B) The display device according to claim 3, wherein the display is a color display.

By performing the above (a) and (b), the visibility of the warning content can be further enhanced. By the way, in this specification, the members according to the configuration of the present invention are defined as follows.

(A) Vehicle information refers to vehicle information such as a fuel gauge, tachometer, speedometer, clock, fuel throttle operation amount, hour meter, engine coolant temperature gauge and the like. (B) Work content refers to work content of an industrial vehicle such as heavy excavation, excavation, straightening, fine operation, and breaker.

(C) Abnormal state means battery voltage abnormality,
An abnormal state of an industrial vehicle such as an abnormal coolant temperature, abnormal engine oil pressure, abnormal engine oil amount, etc.

[0029]

As described in detail above, according to the present invention, it is possible to provide a display device for an industrial vehicle in which the displayed contents are easily visible.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a front view of one embodiment.

FIG. 3 is a block circuit diagram of one embodiment.

FIG. 4 is a perspective view showing a mounting place of one embodiment.

[Explanation of symbols]

 1 ... Operation display device, 2 ... LCD panel

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B66F 9/24 B66F 9/24 Z

Claims (3)

[Claims] 1. A display device for an industrial vehicle, which displays vehicle information and work contents in a normal mode, and displays an abnormal state warning in a warning mode. 2. A display device for an industrial vehicle, which displays vehicle information and work contents in the normal mode, turns off the display in the normal mode in the warning mode, and displays a warning of an abnormal state. 3. The display device according to claim 1, wherein the display is an active matrix type TFT type LCD, an active matrix type diode type LCD, an ECB type LCD, a ferroelectric type LCD,
Plasma display, plasma address LCD, CR
A display device displayed on one display selected from the group consisting of T.