KR950007111B1 - Input signal control apparatus for monitor - Google Patents

Abstract

The control device shutting off computer monitor automatically when a computer user does not use the keyboard or the mouse comprises the CPU (100) and the system controller (102) controlling the overall system; the buffer (103) buffering the control signal generated by the system controller (102); the VGA controller (105) generating digital R/G/B video signal, horizontal/vertical synchronous signal and blanking signal; the D/A convertor (106) converting the digital video signal into the analog video signal; the synchronous signal generator (109) generating the horizontal/vertical signal generator; the VGA port (107) providing video signal and the synchronous signal to the computer monitor.

Description

Monitor input signal controller

1 is a block diagram of a video control system of a conventional personal computer.

2 is a block diagram of a monitor input signal controller of the present invention.

3 is a detailed circuit diagram of FIG.

4 is an input / output timing diagram of each part of FIGS. 2 and 3;

* Explanation of symbols for the main parts of the drawings

101: keyboard controller 105: VGA controller

106: digital / analog converter 107: VGA port

108: logical product 109: horizontal / vertical synchronous control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor input signal control apparatus. In particular, a personal computer does not use a personal computer for a long time by controlling R, G, B signals and horizontal and vertical synchronous signals input to the monitor using keyboard input signals. The present invention relates to a monitor input signal control device for reducing power consumption when the monitor is not in use by automatically turning off the monitor's X-ray.

In the conventional personal computer, as shown in FIG. 1, the image control system includes a central processing unit (100) for controlling the entire system operation, a control signal and a keyboard output from the central processing unit (100). A system controller 102 for controlling the system according to a signal obtained from the controller 101, a buffer 103 for buffering and outputting a signal output from the system controller 102, and a signal output from the buffer 103 VGA controller 105 for extracting and outputting data stored in the image RAM 104 according to the present invention, a digital / analog converter 106 for converting data obtained from the VGA controller 105 into an analog signal, and the digital / It is composed of a VGA port 107 for outputting the analog R, G, B signals and horizontal and vertical synchronization signals output from the analog converter 106 to a monitor (not shown).

Referring to the operation of the conventional image control system configured as described above, the central processing unit 100 controls the system controller 102 when the image is to be monitored on the monitor.

Accordingly, the system controller 102 outputs a system control signal, and the output system control signal is buffered through the buffer 103 and input to the VGA controller 105.

Accordingly, the VGA controller 105 extracts and outputs R, G, and B image data and horizontal and vertical synchronization signals from the image RAM 104 according to the input control signal.

The digital R, G, B image data and horizontal and vertical synchronization signals output from the VGA controller 105 are converted into analog signals through the digital / analog converter 106 and output through the VGA port 107. The monitor receives the input and displays it on the screen.

In the above, the control of the R, G, and B signals is performed by the command on the Basic BIOS (Basic Input Output System). The output of the R, G, and B signals is O, O, O, and the background / You can control this by turning the screen off with the foreground black.

In addition, the control of the horizontal and vertical synchronization signals is not controlled by the system BIOS and only outputs to the monitor.

However, such a conventional image control system has a problem in which the color remains on the screen because the horizontal / vertical synchronization signal is broken and only the R, G, and B signals are output to turn off the monitor when the user does not use the personal computer system for a certain period of time. In order to eliminate this problem, the BIOS has to bear the burden to search periodically by using timer routine to control R, G, and B signals. May cause.

In addition, the control of the horizontal / vertical synchronous signal that can enter the power down mode in order to save the monitor power has a problem that can not be controlled by the BIOS.

Accordingly, an object of the present invention is to control the R, G, B signals and horizontal and vertical synchronization signals inputted to the monitor by using the output of the keyboard port to turn off the X-ray of the monitor when the user does not use the personal computer for a long time. It provides a control device for the monitor input signal to reduce the power consumption of the monitor in use.

Means for achieving the present invention is the logical multiplication means for logically multiplying the signal output from the keyboard port and the blanking signal obtained by the VGA controller, and the digital R, G, B obtained by the VGA controller in accordance with the signal obtained by the logical multiplication means A digital / analog converting means for converting a signal into an analog signal and outputting the same, and a horizontal / vertical synchronizing control means for controlling a horizontal / vertical synchronizing signal according to the signal output from the keyboard port, are described below. When described in detail based on the accompanying drawings as follows.

2 is a block diagram of a monitor input signal controller of the present invention. As shown in FIG. 2, a central processing unit 100 for controlling the overall operation of the apparatus, a keyboard controller 101 capable of inputting a function of a user, and the central processing unit are provided. A system controller 102 for controlling the system according to a control signal obtained from the apparatus 100 and a signal output from the keyboard controller 101, and a buffer 103 for buffering and outputting a signal output from the system controller 102; And a VGA controller 105 for outputting digital R, G, B signals, a horizontal / vertical synchronization signal, and a blanking signal according to the signal output from the buffer 103, and the blanking output from the VGA controller 105. A logical multiplication unit 108 for performing a logical AND on the signal and the signal output from the keyboard controller 101, and the R, G, B signals output from the VGA controller according to the signal obtained by the logical multiplication unit 108. Outputs R, G, B signals and horizontal / vertical synchronization signals respectively obtained by the digital / analog converter 106 and the digital / analog converter 106 and the horizontal / vertical synchronizer 109, respectively. VGA port 107 is configured.

Referring to Figures 3 and 4 attached to the operation and effect of the present invention monitor input signal control device configured as described above in detail as follows.

When the user is using the personal computer, the output of the port P1 of the keyboard controller 101 becomes high.

In addition, the input for the corresponding key is input to the system controller 102 through the port (P2).

Accordingly, the system controller 102 outputs a control signal corresponding to the output of the keyboard controller 101, and the output signal is buffered through the buffer 103 and input to the VGA controller 105.

Accordingly, the VGA controller 105 outputs digital R, G, and B signals, horizontal / vertical synchronization signals, and blanking signals, respectively, as shown in FIGS. 4B to 4D.

The digital R, G, and B signals are converted into analog signals through the digital / analog converter 106, and the blanking signals are output from the port P1 of the keyboard controller 101 through the logical product 108. The output is also high by being multiplied by the signal, which is input to the digital / analog converter 106. Accordingly, the digital / analog converter 106 operates by the high signal output from the logical product 108 and converts the input digital R, G, and B signals into analog R, G, and B signals and outputs them to the rear stage. do.

In addition, the horizontal / vertical synchronization signals output from the VGA controller 105 are input to the first and second gates 109a and 109b in the horizontal / vertical synchronization controller 109, respectively. Since the high signal output from the keyboard controller 101 is input to the control stages 109a and 109b, the horizontal / vertical synchronous signal to which the operation state is input is output to the rear stage.

The horizontal / vertical synchronous control unit 109 and the digital / analog converter 106 output the horizontal / vertical synchronous signal and the R, G, and B signal VGA ports 107 to monitor (not shown). It is entered and monitored.

On the other hand, when the user does not input a predetermined time key or mouse input, the keyboard controller 101 continuously searches by using the internal counter, and if there is no key input or mouse input even though the user inputs a predetermined time or more, the port P1 automatically sorts out. Transmit the signal to a low state.

The time set here may be arbitrarily set by the user.

The low signal output from the keyboard controller 101 is input to the logical multiplication unit 108 and the horizontal / vertical synchronization control unit 109, respectively, as shown in FIG.

Accordingly, the logical product 108 logically multiplies the low signal output from the keyboard controller 101 and the blanking signal output from the VGA controller 105 with the internal AND gate 108a.

Since the output of the AND gate 108a is low because the output of the keyboard controller 101 is low, the low signal is output as shown in FIG. 4D regardless of the presence or absence of the blanking signal.

The signal output from the logical product 108 is input to the digital / analog converter 106 as a control signal. Since the output of the logical product 108 is low, the digital / analog converter 106 is in a stopped state. This turns off the output of the R, G, and B signals.

In addition, the horizontal / vertical synchronization controller 109 that receives the low signal of the keyboard controller 101 is the keyboard controller as a control signal of the first and second gates 109a and 109b, as shown in FIG. An output of 101 is used, where the first and second gates 109a and 109b are both off because the output of the keyboard controller 101 is low.

Therefore, the horizontal / vertical synchronization signals (H-Sync, V--Sync) output from the VGA controller 105 are all blocked.

Accordingly, the input value of the VGA port 107 is in mode 0 (low state) and its output is also low. In this case, when the monitor is a new green monitor, the display is switched to the power down mode. Will be done.

When the blanking signal is described in more detail in the above-described operation, the digital / analog converter 106 normally outputs the R, G, and B signals, and when the digital signal is active, the digital / analog converter 106 is turned off. Make the output low.

This low output is the signal that controls the screen to be black.

On the other hand, if the user inputs again after not using the keyboard for a predetermined time, the output of the port P1 of the keyboard controller 101 transitions to a high state again, and the following operations are restored to a normal state to perform the above-described operation. Will be.

A and C shown in FIG. 4E indicate that the monitor is in use, and the B state indicates a power down mode or a screen save state.

For reference, Green Monitor consumes about 60 ~ 70W of current monitor's power during operation, and it uses 70% of current monitor's power without turning off the X-ray applied by personal computer. The monitor can be reduced.

As described in detail above, the present invention cuts off the horizontal / vertical synchronization signal input to the monitor when the user does not use the system and the monitor on for more than a predetermined time, thereby automatically turning off the X-ray in the monitor. It has the effect of reducing the consumption, and also has the effect of adding the screen save function of the monitor by controlling the hardware by using the blanking signal. There is an effect that can eliminate the problem.

Claims (3)

A keyboard controller for outputting a signal according to a function key input of a user, a VGA controller for outputting digital R, G, B signals, horizontal / vertical synchronization signals, and blanking signals according to system control signals, and outputted from the keyboard controller A logical multiplication means for logically multiplying the signal and the blanking signal output from the VGA controller and outputting the result, and the digital R, G, and B signals controlled by the logical multiplication means and outputted from the VGA controller. Digital / analog converting means for converting and outputting the signal, horizontal / vertical synchronizing control means for controlling the horizontal / vertical synchronizing signal obtained by the VGA controller according to the signal output from the keyboard controller, the digital / analog converting means, and V for outputting the R, G, B signals and the horizontal / vertical synchronous signals respectively obtained by the horizontal / vertical synchronous control means to the monitor. Monitor input signal control device, characterized in that the GA port. The apparatus of claim 1, wherein the keyboard controller outputs a high signal when there is a key input within a predetermined time using the internal timer, and outputs a low signal when there is no key input for a predetermined time. The monitor input according to claim 1, wherein the horizontal / vertical synchronization control means comprises first and second gates for outputting and blocking the horizontal / vertical synchronization signal obtained from the VGA controller according to the signal output from the keyboard controller. Signal controller.