JPH04178723A - Graphic display processor - Google Patents

Abstract

PURPOSE:To reduce the power consumption of a display device by turning on and off the back light of a liquid crystal graphic display processor. CONSTITUTION:The graphic display processor 2 consists of an image display part 5 which displays an image and an image processing part 6 which processes and displays transferred data on the display part 5 and controls the image display part 5. This image display part 5 consists of a liquid crystal panel 51 which is connected to the display control part 65 of the image processing part 6, the back light 52 which is a fluorescent lamp, and a back light turning-on circuit part 53 which is connected to a back light control circuit part 66 and turns on the back light 52. Then the back light control part 66 turns on and off the back light 52 which is the fluorescent lamp from a CPU 61 through a system bus 67 according to software. Consequently, the power consumption is reducible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a graphic display processing device that displays data sent from a host computer using a microcomputer within the device.

[Prior art and problems to be solved by the invention] Conventionally,
In plant monitoring and control systems, hospital management systems, building management systems, premises monitoring systems, traffic control systems, etc., data sent from a host computer via a communication line is processed by a built-in microcomputer to create graphics. A graphics display processing device is used to display the graphics.

The display section of this graphic display processing device includes a cathode ray tube (CRT), a plasma display panel (PDP)
), light emitting diode (LED) panels, electroluminescent (EL) panels, liquid crystal (LCD) panels, etc. are used.

By the way, when it comes to plant status display, when there is a change in the operating status, or when an operator wants to check the operating status, it is sufficient to display only the unit, but conventional graphic display processing equipment Even though there is no need to display it, it remains displayed.

In addition, CRT, plasma display panel, EL
Since deterioration phenomena such as dimming and burn-in occur in panels and backlight light sources, the lifespan of the image display section is short, especially in graphic display processing devices for plants that are used for a long time. This problem of lifespan is particularly noticeable in fluorescent lamps used as backlight light sources, and cold cathode fluorescent lamps, which have low luminous efficiency but have a relatively long lifespan, have a lifespan of 10,000 to
In the case of a hot cathode fluorescent lamp with high luminous efficiency, the time difference is only 1,000 to 3,000 hours.

Therefore, in applications where reliability is required over a long period of time, it is necessary to replace CRTs, plasma display panels, EL panels, backlight sources, etc. at appropriate intervals, resulting in the problem of large amounts of time and expense. There is.

In addition, backlight light sources for CRTs, LED panels, PDPs, EL panels, and LCD panels consume a lot of power because they emit light.Especially when a backlight is installed on an LCD panel with low power consumption, the extinction power becomes large. There's a problem.

It is an object of the inventions of the present application to solve these problems and to provide an image display processing device that can achieve these problems.

[Means for Achieving the Objects] In order to achieve the above objects, each invention of the present application is capable of turning on/off the image display of the graphic display processing device, that is, it is possible to turn on/off the image display of the graphic display processing device. A graphic display processing device that displays data sent from an external host computer via a communication line, and is characterized by turning on/off image display. ``A graph ink display processing device having an image display section and an image processing section and displaying data sent from an external host computer via a communication line, The second invention is a graphic display processing device tJ characterized by turning on/off image display on a display section, and an external host computer having #I image display system g1M. A graphic display processing device that displays data sent through a communication line from A third aspect of the invention is a graphic display processing device characterized in that it is a graphic display processing device, and a graphic display processing device that has an image display section and a control section and displays data sent from an external host computer via a communication line. H1t, the image processing unit determines whether there is new data, and
A fourth aspect of the present invention is provided, in which a component thereof is "a graphic display process Hif" characterized by turning on/off an image display in an image display section.

[Operation] Each of the inventions of the present application has the above-described configuration, and in the first invention, when the image is displayed and the display becomes unnecessary, and when the image is not displayed, the image is displayed. When it becomes necessary, the system operator performs an operation to turn on/off the image display, and in the second invention, the display is no longer necessary while the image is being displayed. In the third invention, when the host computer determines that display is no longer necessary when the image is not displayed, the image display is turned on/off, and in the third invention, the image is displayed. When the image display is no longer needed or when it becomes necessary to display the image when it is not displayed, the system operator turns on/off the image display, and the host computer turns the image display on/off. In the fourth invention, the graphic display processing device determines that the image is no longer required to be displayed while it is being displayed, or that it is necessary to display the image while it is not being displayed, and displays the image. On/off operation is performed.

[＊　　　　　Example Each invention of the present application will be described in detail using the drawings.

FIG. 1 shows a block diagram of an embodiment of a graphic display processing device that employs a backlit liquid crystal display device as an image display unit in the invention of the twelfth application. In this example, the graphic display processing device is used for plant monitoring. It is used in the control system.

As shown in this figure, in a plant monitoring and control system, a host computer l is used to monitor and control the plant.
Control is performed, and the status data, control items, etc. are transferred from the host computer 1 to the graphic display processing device 2 through a communication line and displayed.

The graphic display processing device 2 includes an image display section 5 that displays images, and an image display section 5 that processes transferred data.
The image processing section 6 includes an image processing section 6 that controls the image display section 5.

The image processing unit 6 includes a microcomputer (CPU) 61
, communication department 62. It is equipped with a memory 64, a display control section 65, and a backlight control circuit section 66, and is also equipped with an I10 interface section 63 for connecting a human-powered device such as a keyboard 3 or a touch panel 4 as necessary. is connected to system bus 67.

The image display section 5 includes a liquid crystal panel 51 connected to a display control section 65 of the image processing section 6, a backlight 52 that is a fluorescent lamp, and a backlight 52 that is a fluorescent lamp connected to a backlight control circuit section 66. The backlight lighting circuit section 53 is configured to light up the backlight.

The backlight control circuit section 66 turns on/off the backlight 52, which is a fluorescent lamp, via software from the CPU 61 via the system bus 67.

FIG. 2 shows a specific example of the backlight control circuit section 66.
3v! J shows a specific example of the backlight lighting circuit section 53.

The control circuit gi166 shown here is constructed using a semiconductor element, and has an electric current of 8 m on the image processing device side and the backlight side.
A photocoupler <pc> is used to separate the .

Further, the backlight lighting circuit section includes a dimming circuit and a lighting circuit.

In this circuit, when a backlight-on signal is applied to the base of transistor TRI, TR+ is turned on, and photocouplers P and C are turned on. P.

When C is turned on, transistor TR2 is turned off and transistor TR3 is turned on. Then the transistor T
Ra is turned on, and finally the transistor TRa is turned on, and a lighting voltage is output to the terminal VP. On the other hand, transistor TRa is turned off.

When the lighting voltage is output to Vp, the backlight turns on once.
Backlight 52 which is a fluorescent lamp by alIII
lights up.

When the light is turned off, each transistor, photocoupler, etc. operate in the opposite way to when the light is turned on.

This backlight control circuit section 66 is merely an example, and a commonly used circuit configuration can be used as appropriate. Further, as a means for turning on/off the backlight, other means such as a relay may be used in addition to the transistor switch.

Next, the operation of the host computer l and display processing section 6 is as follows.
This will be explained using a flowchart.

Backlight 52 by this graphic display processing device
The on/off operation is performed by the system operator's on/off operation and the host computer 1's automatic on/off operation.

This on/off operation will be explained.

■On/off operation by system operator's on/off operation When the backlight 52 is turned on and an image is displayed on the image display section 5, when the backlight 52 is turned off by the system operator's operation, When the system operator presses the "r on/off key for the backlight 52 provided on the keyboard 3 or touch panel 4," the data is sent to the CPU 61 via the I10 interface section 63 and system bus 67, and is processed for image processing. The unit 6 transmits information from the communication unit 62 to the host computer 1 that the operator has performed an operation to turn off the backlight 52.

Then, the host computer 1 checks whether or not the display is currently being displayed, and if it is determined that the display is being displayed, it sends a command to the graphic display processing device 2 to turn off the backlight 52. , the command is sent to the CPU 81 via the communication section 62.

Then, the CPU 61 gives a signal to turn off the backlight 52 to the backlight control circuit 66, and the backlight control circuit section 66 turns off the power to the backlight lighting circuit section 53 and turns off the backlight 52.

When the backlight 52 is turned off and no image is displayed on the image display unit 5, when the backlight 52 is turned on by the system operator's operation, the backlight 52 provided on the keyboard 3 or the touch panel 4 is used. no r
When the system operator presses the "on/off key," the data is transferred to the I10 interface unit 63 and the system bus 67.
The image processing unit 6 transmits to the host computer 1 from the communication unit 62 information that the operator has performed an operation to turn on the backlight δ2.

Then, the host computer 1 checks whether or not it is currently being displayed, and if it is determined that it is not being displayed, it sends a command to the graphic display processing H5112 to turn on the backlight 52, The command is sent to the CPU 61 via the communication section 62.

Then, the CPU 61 gives a signal to turn on the backlight 52 to the backlight control port wi 66, and the backlight 1lpH1 circuit section 66 turns on the power of the backlight lighting circuit section 53 and lights up the backlight 52.

In this way, the backlight is turned on and off by software through manual operation by the system operator.

The control flow in that case is shown in FIG.

■ Automatic on/off operation of the host computer When the display screen is stagnant at a certain screen, the host computer determines this and operates the timer, and turns on the backlight 52 when the leap exceeds a certain period of time. A command to automatically turn off the light is sent to the image processing section 6 of the graphic display processing device 2.

When the backlight 52 is off and it becomes necessary to turn on the backlight 62 for display due to an accident or system trouble, the host computer issues a command to the graphic display processing device 2 to turn on the backlight 52. It is transmitted to the image processing section 6 via the communication section 62.

The control flow in that case is $51! Shown in I.

When the graphic display processing device 2 receives a command to turn on the backlight 52 via the communication section 62 of the image processing section 6, the CPU 61 gives a command to turn on the backlight 52 to the backlight control port #68.

Further, when the graphic display processing device 2 receives a command to turn off the backlight 52 via the communication section 62 of the image processing section 6, the CPU 61 controls the backlight control section gi!
166 is given a command to turn off the backlight 52.

The control flow in that case is shown in FIG.

Then, the backlight control circuit 66 supplies power to the backlight 52 and the backlight lighting circuit section 53, and the backlight 52 lights up.

In this embodiment, a liquid crystal display m1ll and a backlight are combined, but as a display device, C
When using a light emitting display device such as an RT, plasma display panel, light emitting diode panel, or EL panel, the backlight control circuit section 66 in FIG. 1 is not necessary, and the display control section 65 directly controls the display device. Turn on/off.

In the above explanation, the host computer 1 instructs the graphic display processing unit 12 to turn on or off, but this operation may be performed by the microcomputer in the image processing section instead of the host computer. .

Furthermore, when the image display unit displays a display, it is necessary to notify the system operator that there is a display, so it is also possible to use a sound device such as a buzzer.

[Effects of the Invention] As explained above, according to the inventions of the present application, the lighting of the backlight of a liquid crystal graphic display processing device, cathode ray tube, plasma display panel, light emitting diode panel, electroluminescence panel, liquid crystal panel, etc. etc. can be turned on and off, greatly extending the life of the backlight or display device, freeing you from frequent replacement work, ensuring uniform display quality over a long period of time.
As a result, the average power consumption of the entire system can be significantly reduced.

4. I! Brief explanation of page 1 FIG. 1 is a block diagram of the graphic display processing device of the present invention, FIG. 2 is a specific circuit diagram of the backlight control circuit section,
Figure 3 is a conceptual diagram of the backlight lighting circuit, Figure 4 is a flowchart of the operation of the graphic display processing device, Figure 5 is a flowchart for determining backlight on/off commands in the host computer, and 6rM is a graphic display. It is a flowchart of the backlight on/off command operation from the host computer in the processing device.

In the figure, 1... host computer, 2... graphic display processing device, 3... keyboard, 4... touch panel, 5... image display section, 6... image processing section, 51... Liquid crystal panel, 52... Backlight, 53... Backlight lighting circuit section, 61... Microcomputer, 62... Communication section, 63... I10 interface, 64... To memo i 65.・Display control unit,
66... Backlight control circuit section, 67... System bus, Patent applicant: Japan Radio Electric Service Co., Ltd. Representative: Patent attorney Mura 1) Yukio (and 1 other person) Figure 2 Figure 3

Claims (6)

[Claims] (1) A graphic display processing device that has an image display section and an image processing section and displays data sent from an external host computer via a communication line, which turns on/off the image display.
A graphic display processing device characterized by turning off. (2) A graphic display processing device that has an image display section and an image processing section and displays data sent via a communication line from an external host computer, which displays images on the image display section according to instructions from the host computer. A graphic display processing device characterized by turning on/off. (3) A graphic display processing device that has an image display section and a control section and displays data sent from an external host computer via a communication line, and the host computer is controlled by a switch provided in the graphic display processing device. A graphic display processing device characterized by turning on/off an image display on an image display section. (4) A graphic display processing device that has an image display section and a control section and displays data sent from an external host computer via a communication line, where the image processing section determines whether there is new display data and displays an image. A graphic display processing device characterized by turning on/off image display on a display unit. (5) The graphic display processing device according to any one of claims 1 to 4, wherein the image display section is a liquid crystal panel having a light source for backlight illumination. (6) The image display unit according to any one of claims 1 to 4, wherein the image display unit is a light emitting display unit such as a cathode ray tube, a plasma display panel, a light emitting diode panel, or an electroluminescence panel. Graphic display processing device.