JPH08221044A - Crt display device - Google Patents

Abstract

PURPOSE: To prevent the burning of a CRT screen by completely turning off a power source of a CRT device when display is not required, turning on a power source automatically when data is inputted to a computer even in a state in which a power source is completely turned off, and displaying required information. CONSTITUTION: When data is externally inputted, a computer 5 receives a measuring start request and starts measuring, stops measuring after the lapse of a prescribed time, and outputs a command for turning off a power source of a CRT device 4 to a power source supplying device 3. Since data is not inputted for a fixed time even if an operator forgets to turn off a power source or a power source of the CRT device 4 is automatically turned off when display is not varied, the burning of a CRT screen can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CRT display device for a computer-based system.

[0002]

2. Description of the Related Art Usually, a CRT display device main body (hereinafter simply referred to as CRT) is used to display a processing result in a computer, and the CRT is also in an energized state while the computer is in use. Therefore, when the computer is continuously used for a long time, the CRT also remains energized for a long time. However, when using the computer continuously for a long time, CR
The time required for the T display is often short. That is, C
Since there is no display request from the computer during the time when the RT display is not necessary, the same display is displayed on the CRT device for a long time. If the same display is displayed for a long time,
A seizure phenomenon on the surface of the CRT tube may occur.

In order to prevent the burn-in phenomenon on the surface of the CRT, conventionally, there is a function of automatically erasing the display when the display does not change for a certain period of time and displaying it when a new display request is made. There is a device having a function of lowering the brightness instead of automatically erasing, and returning the brightness to the normal state when a new display request is made.

[0004]

In order to prevent the burn-in phenomenon on the surface of the CRT, the display is automatically erased when the display does not change for a certain period of time, or the brightness is temporarily reduced. CRT despite not doing
Is energized, and the internal circuit is operating. Therefore, the period until the life (usable time) of the CRT is shortened as compared with the case where the power is turned off. Therefore, C
In order to extend the life of the RT, it is conceivable to turn off the power of the CRT when the CRT display is not required. However, in this case, even if the computer tries to display the information, the CR
There is a problem that it cannot be displayed because the T power supply is off. For this reason, even if the display is unnecessary, CR
I could not turn off T.

The present invention has been made in view of the above circumstances, and its purpose is to prevent a screen burn-in phenomenon when there is no need for display and to prolong the life of the device, thereby providing a CRT display. An object of the present invention is to provide a CRT display device in which the power of the main body of the device is completely turned off, and the computer automatically turns on the power even when the power is completely turned off to display necessary information.

[0006]

In order to achieve the above object, the present invention provides an input device, a computer, a power supply control device connected to the input device and the computer, and a command for the power supply control device. A power supply device that supplies power by
In the CRT displaying the processing result of the computer, the computer starts the measurement from the time when the measurement start request is received, stops the measurement after a predetermined time, and outputs a command to turn off the power of the CRT display device to the power supply device. It is characterized by doing.

[0007]

By the above means, the requests from the input device and the computer are converted into a command for the power supply device by the power supply control device, and the power supply to the CRT is performed by this command so that the CRT is powered only for the minimum necessary time. Since the power is supplied, the usable period of the CRT can be extended as compared with the case where the power is always supplied. Also, even if the operator forgets to turn off the power, the CRT device body is automatically turned off when there is no data input for a certain period of time or the display does not change.
It is possible to prevent burning of the CRT tube surface.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, when the operator determines that the CRT 4 needs to be turned on (or off), the request is input to the input device 1, the power control device 2 is notified, and then the power supply device 3 is turned on. A (or off) command is output and the CRT 4 is turned on (or off).

When data is input from the outside, the data input function 51 of the computer 5 outputs a power-on request and a measurement start request. The power-on request is notified to the request output function 52. Upon receiving this request, the request output function 52 notifies the power supply control device 2 of the power-on request. After that, the power supply control device 2 outputs an input command to the power supply device 3, and CR
The power of T4 is turned on.

Further, the input data is passed from the data input function 51 to the data processing function 53, the processing result is notified to the screen display function 54, and the processing result is displayed on the CRT 4.

On the other hand, when the above-mentioned measurement start request is notified, the time measurement function 55 receives the request and starts time measurement. If measurement is in progress, stop measurement and start time measurement again. The time measuring function 55 stops the measurement when a preset time has elapsed and notifies the request output function 52 of a power-off request. The request output function 52 receives this request and notifies the power supply control device 2 of the power-off request. After that, the power supply control device 2 outputs a power-off command to the power supply device 3 to power off the CRT 4.

Further, the screen display function 54 notifies the display change detection function 56, and when the display detection function 56 detects the screen display change, it outputs a measurement start request to the time measurement function 55. The time measurement function 55 starts the measurement, stops the measurement when the set time has elapsed, and notifies the request output function 52 of the power-off request. After that, the power supply control device 2 outputs a cutoff command to the power supply device 3, and the power supply of the CRT 4 is cut off.

FIG. 2 is a block diagram of another embodiment of the present invention. In the figure, a CRT power button 21 is connected to a process input / output device (hereinafter, PIO device) 22. PIO
The device 22 is connected to the power supply device 3. The power supply device 3 supplies power to the CRT 4.

By the way, when the operator presses the CRT power button 21 while the CRT 4 is not supplied with power, the information is notified to the PIO device 22. A power-on command is output from the PIO device 22 to the power supply device 3, power is supplied to the CRT 4, and the processing result in the computer is displayed.

If the operator presses the CRT power button 21 while power is being supplied to the CRT 4, the information is
The IO device 22 is notified. A power-off command is output from the PIO device 22 to the power supply device 3, power is not supplied to the CRT 4, and the screen disappears.

In this case, since the computer 5 is not supplied with power from the power supply device 3, the computer 5 is operating even if the CRT screen disappears. When data is externally input to the data input function 51, which is a function of the computer 5, the power output request is notified to the request output function 52. Received this request,
The request output function 52 notifies the PIO device 22 connected to the computer 5 of the power-on request. After that, PIO device 2
2 outputs an ON command to the power supply device 3, and the CRT 4
Is turned on. Further, the input data is passed from the data input function 51 to the data processing function 53, the processing result is notified to the screen display function 54, and the processing result is displayed on the CRT 4.

FIG. 3 is a block diagram of still another embodiment of the present invention. In the figure, the data input function 51 of the computer 5
When data is input from the outside, the time measurement function 53 is notified of the measurement start request. When receiving the measurement start request, the time measuring function 53 stops the measurement and restarts the measurement if the measurement is in progress. The time measuring function 53 stops the measurement when the preset time elapses and notifies the request output function 52 of a power-off request. Upon receiving this request, the request output function 52 notifies the PIO device 22 connected to the computer 5 of the power-off request. After that, the PIO device 2 outputs a power-off command to the power supply device 3, and the power of the CRT 4 is turned off.

FIG. 4 is a block diagram of another embodiment of the present invention. In the figure, when data is externally input to the data input function 51 of the computer 5, the screen display function 54 notifies the display change detection function 56. Display detection function 5
When a screen display change is detected in 6, a measurement start request is output to the time measuring function 55. The time measurement function 55 starts the measurement, stops the measurement when the set time has elapsed, and notifies the request output function 52 of the power-off request. After that, the PIO device 22 outputs a disconnection command to the power supply device 3, and CR
The power of T4 is turned off.

As described above, according to each embodiment, the CR
The power supply to T is performed only during a necessary time period, so that the seizure phenomenon on the tube surface can be prevented. In addition, the time for energizing the CRT can be shortened compared to the case where the CRT is always energized.
The usable period of the RT can be extended.

[0020]

As described above, according to the present invention,
The requests from the input device and the computer are converted into a command for the power supply device by the power supply control device, and by this command, the CRT
Since the power is supplied to the CRT, it is possible to prevent the CRT tube surface from being burned, and the CR is used only for the minimum required time.
Since power can be supplied to T, the usable period of the CRT can be extended as compared with the case where power is constantly supplied. In addition, even if the operator forgets to turn off the power, if there is no data input for a certain period of time or the display does not change, the CRT is automatically
Since the power is turned off, it is possible to prevent the CRT tube surface from being burned.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of another embodiment of the present invention.

FIG. 3 is a configuration diagram of still another embodiment of the present invention.

FIG. 4 is a configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

1 ... Input device, 2 ... Power supply control device, 3 ... Power supply device,
4 ... CRT display main body, 5 ... calculator, 21 ... power button,
22 ... PIO device, 51 ... Data input function, 52 ... Request output function, 53 ... Data processing function, 54 ... Screen display function, 55 ... Time measurement function, 56 ... Display change detection function.

Claims (1)

[Claims] 1. An input device, a computer, a power supply control device connected to the input device and the computer, a power supply device for supplying power according to a command from the power supply control device, and a processing result of the computer. In what is displayed on the body of a CRT display device, the computer starts a measurement from the time when a measurement start request is received and stops the measurement after a predetermined time, and the power supply based on the operation output of the time measurement function. A CRT display device provided with a request output function for outputting a command to turn off the power to the device.