JP2586302B2 - Screen burn-in prevention device and its prevention method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system for processing data input from a keyboard by a computer and displaying the processing result on a CRT device.
In particular, the present invention relates to a screen burn-in prevention device that prevents screen burn-in to a CRT device by displaying the same processing result over a long period of time, and a method of preventing the same.

[0002]

2. Description of the Related Art A conventional screen burn-in prevention technology uses a keypad to detect that there is no input from a keyboard for a certain period of time.
It is customary to prevent screen burn-in of the CRT device by reducing the display brightness of the RT device or by randomly moving the display information when detecting that the display information on the CRT device is the same for a certain period of time. there were. (For example, JP-A-59-69788, JP-B-64-84)
293, JP-A-1-241596, JP-A-2-115894, and JP-A-2-121793.

[0003]

The above-mentioned conventional screen burn-in prevention technology is based on the problem that when an operator leaves a seat by telephone or the like while the display brightness of the CRT device is lowered.
Data destruction due to erroneous operations such as turning off the power or inputting illegal data cannot be avoided regardless of the person or the other person.

When the display information is moved at random, burn-in to the screen can be prevented, but deterioration of the CRT device itself cannot be avoided because the screen is displayed on the CRT device.

Further, since the CRT device is always in the data display state, there is a problem that power is consumed irrespective of whether or not the displayed data is useful.

[0006]

According to the present invention, the on / off of a power switch is monitored to turn on / off the power of a computer and reset a signal cutoff flag.
At the same time monitors the input from the keyboard have availability and line set-reset of the signal blocking flag data input to the computer, and the input from the keyboard
If there is no signal for a certain period of time, the signal cutoff flag is set.
An input monitoring processing unit, a video signal conversion processing unit that converts one screen of an image signal from the computer into screen data, and a screen data storage unit that stores the screen data converted by the image signal conversion processing unit. , rows and the screen data storing unit to store the screen data becomes mismatched, the comparison of whether there is a change in data of the data and the screen data saving section of said screen data storage unit in the previous comparison
According to the comparison result, setting of the signal cutoff flag
A screen data comparison processing unit for controlling reset, and the image
If there is no change in the data and the signal cutoff flag is set
The computer turns off the CRT according to the state of the signal cutoff flag so that the power of the CRT device is turned off when the
A screen burn-in prevention device is provided, comprising: an image signal cut-off processing unit that cuts off image data to the RT device and turns on / off the power of the CRT device.

Further, according to the present invention, the power switch O
Monitor N / OFF and turn on / off computer power
Reset the FF and signal cutoff flag, and
Monitors input from the board and sends data to the computer.
Data input and setting / resetting of the signal cutoff flag.
The input from the keyboard for a certain period of time.
Input to set the signal cutoff flag if not
A monitoring processing unit, and an image signal from the computer
An image signal conversion processing unit for converting the surface into screen data;
The screen data converted by the image signal conversion processing unit is recorded.
Screen data storage unit does not match with previous comparison
Screen data storage to save screen data
And data of the screen data storage unit and the screen data storage.
We compare whether there is a change in the data of
Set / reset the signal cutoff flag according to the comparison result
Screen data comparison processing unit for controlling the image data,
When there is no change and the signal cutoff flag is set
To shut off the power of the CRT device.
From the computer to the CRT device depending on the state of the
Block image data and turn on the power of the CRT device
An image signal cut-off processing unit for turning off the screen, and when there is no input from the keyboard within a predetermined time, the screen
If there is no change in the chromatography data, the <br/> screen burn-prevention method which is characterized in that the power OFF of blocking as well as the CRT device of the image data to the CRT device can be obtained.

[0008]

The image signal from the computer is converted into screen data by the image signal conversion processing section and stored in the screen data storage section. The screen data comparison processing section compares the data in the screen data storage section with the contents in the screen data storage section 7 and sets a signal cutoff flag if they do not match.

The input monitoring processor sets a signal cutoff flag when there is no input from the keyboard for 5 minutes. The image signal cutoff device cuts off the image signal to the CRT device when both of the signal cutoff flags are set. Further, if this state continues for a predetermined time or more, the power of the CRT device is turned off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a screen sticking prevention device according to the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a screen burn-in prevention device according to the present invention.

The screen burn-in prevention device includes an input monitoring processing unit 8, an image signal conversion processing unit 4 for converting one image signal from the computer 9 into screen data, and a screen converted by the image signal conversion processing unit 4. A screen data storage unit 5 for storing data.

The input monitoring processing unit 8 monitors ON / OFF of the power switch 11 and turns on the power of the computer 9.
OFF and resetting of the signal cutoff flag 3 are performed, and at the same time, input from the keyboard 10 is monitored to enable or disable data input to the computer 9 and set / reset the signal cutoff flag 3.

Further, the screen burn-in prevention device includes a screen data storage unit 7 for storing screen data that has become inconsistent in the previous comparison, and a comparison between the data in the screen data storage unit 5 and the data in the screen data storage unit 7. And a screen data comparison processing unit 6 for controlling the setting / resetting of the signal cutoff flag 3 according to the result. An image signal cutoff processing unit 2 that performs ON / OFF operation is provided.

The CRT device 1 displays an image signal from the computer 9. The image signal cutoff processing unit 2 sends a CRT from the computer 9 according to the state of the signal cutoff flag.
The image signal to the device 1 is cut off and the power of the CRT device 1 is turned off. The signal cutoff flag 3 has a flag of the signal cutoff flag 3 indicating that there has been no input from the keyboard 10 for a certain period, and a flag of the signal cutoff flag 3 indicating that there has been no change in screen data for a certain period. I have.

The image signal conversion processor 4 converts image signals from the computer 9 into screen data at regular intervals. The screen data storage unit 5 temporarily stores the screen data converted by the image signal conversion processing unit 4. The screen data comparison processing unit 6 compares the screen data and sets the signal cutoff flag 3 when there is no change in the screen data. The screen data storage unit 7 stores comparison target data of screen data. The input monitoring processing unit 8 monitors the keyboard 10 and sets the signal cutoff flag 3 when there is no data input from the keyboard 10 for a certain period of time. The operation is invalidated, and at the same time, the flag of the signal cutoff flag 3 is reset.

The computer 9 processes data input from the keyboard 10 and inputs data to the computer 9 which sends the result to the CRT device 1 as an image signal. The power switch 11 operates to turn on / off the power of the computer 9.

If there is no change in the screen data without input from the keyboard 10 within a predetermined time, the CRT
The image data is cut off to the device 1 and the power of the CRT device 1 is turned off to prevent the screen burn-in of the CRT device 1 and reduce the power consumption due to the display of the same screen data for a long time.

Now, the image signal conversion processing section 4 divides one screen of the image signal from the computer 9 into small sections (1024 × 768) at 3 minute intervals, and the color information of one section is 256 colors. The image signal is converted into screen data by a process of performing quantization so as to represent the three primary colors and the luminance in four stages, and stored in the screen data storage unit 5.

The screen data comparison processing section 6 monitors the screen data storage section 5 and compares the contents of the screen data storage section 5 with the contents of the screen data storage section 7 when new screen data is stored, and does not match. If the portion is less than 0.1%, it is determined that the image has not changed, and the flag of the image cutoff flag 3 is set. If the unmatched portion is 0.1% or more, it is determined that the image has changed, and the flag of the image cutoff flag 3 is reset. At the same time, the contents of the screen data storage unit 7 are replaced with the contents of the screen data storage unit 5. Perform the replacement.

The input monitoring processor 8 monitors the keyboard 10 and the power switch 11, and sets the image cutoff flag 3 when there is no input from the keyboard 10 for more than 5 minutes. Further, when there is an input from the keyboard 10 and the power switch 11 in the image cutoff state, the flag of the image cutoff flag is reset. Further, the input data from the keyboard 10 and the power switch 11 is discarded when the image is in the image cutoff state, and otherwise input to the computer 9 as it is. The image signal cutoff processing unit 2 monitors the signal cutoff flag 3, and when both the flag of the signal cutoff flag 3 and the flag are set, the computer displays the CRT device 1.
To the input monitoring processing unit 8 at the same time. In this state, if either the flag or the flag of the signal cutoff flag 3 is reset, the image signal from the computer 9 to the CRT device 1 is passed, and at the same time, the input monitoring processing unit 8 is notified of the release of the image cutoff state. I do.

If the image cutoff state continues for 10 minutes, the power of the CRT device 1 is turned off, and when the image cutoff state is released, the power supply of the CRT device 1 is turned on.

[0022]

As described in the above embodiments, the screen burn-in prevention apparatus and method according to the present invention provide a CRT in a case where there is no input from a keyboard and there is no change in screen data within a predetermined time. By shutting off the image data to the apparatus and turning off the power of the CRT apparatus, there is an effect that the screen burn-in of the CRT apparatus due to the long-time display of the same screen data can be prevented and the power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a screen burn-in prevention device and a method for preventing the same according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 CRT device 2 image signal cutoff processing unit 3 signal cutoff flag 4 image signal conversion processing unit 5 image data storage unit 6 image data comparison processing unit 7 image data storage unit 8 input monitoring processing unit 9 computer 10 keyboard 11 power switch

Claims (2)

(57) [Claims] An on / off operation of a power switch is monitored to turn on / off a power supply of a computer and reset a signal cutoff flag. At the same time, an input from a keyboard is monitored to determine whether data can be input to the computer. There line set-reset signal blocking flag, and the
If there is no input from the keyboard for a certain period of time,
An input monitoring processing unit for setting a signal cutoff flag, an image signal conversion processing unit for converting one image signal from the computer into screen data, and a screen for storing the screen data converted by the image signal conversion processing unit a data storage unit, and the screen data storage section to store the screen data not matched in the previous comparison, the change in the data of the data and the screen data saving section of said screen data storing unit there
And a screen data comparison processing unit for controlling the setting / resetting of the signal cutoff flag based on the comparison result, and the signal cutoff without any change in the image data.
If the flag is set, turn off the power of the CRT device.
Screen, characterized by comprising an image signal blocking processing unit that performs ON · OFF of the power supply cut-off and the CRT unit image data from the computer the state of the signal blocking flag to the CRT device to the cross-sectional Anti-seizure device. 2. Monitoring ON / OFF of a power switch.
ON / OFF of computer power and signal cutoff flag
Reset and monitor keyboard input at the same time.
Whether data can be input to the computer
Setting / resetting the signal interruption flag, and
If there is no input from the keyboard for a certain period of time,
An input monitoring processor for setting a signal cutoff flag;
Converts one screen of image signal from computer into screen data
An image signal conversion processing unit to be converted, and the image signal conversion processing unit
Screen data storage for storing the converted screen data
And the screen data that did not match in the previous comparison
A screen data storage unit to be stored, and the screen data storage unit
Data and the data in the screen data storage
The signal is compared with the signal
Screen data ratio to control setting / resetting of cut-off flag
Comparison processing unit and the signal cutoff without any change in the image data
If the flag is set, turn off the power of the CRT device.
Depending on the state of the signal cutoff flag.
Shut off image data from the computer to the CRT device
Signal for turning on and off the power of the CRT device
And a cutoff processing unit, which cuts off image data to the CRT device and the C when the screen data does not change in a state where there is no input from the keyboard within a predetermined time.
Screen burn-prevention method which is characterized in that the power supply OFF RT device.