KR100202953B1 - Power saving method using osd - Google Patents

Abstract

The present invention relates to a method and apparatus for monitoring a monitor by changing a monitor screen by a control signal from an on-screen display without using an application program for windows and doses so that a monitor can be protected from unreasonable output of a screen, The present invention relates to a method of protecting a screen of a power saving monitor using an on-screen display, and more particularly, to a screen saver of a power saving monitor using an on-screen display capable of protecting a monitor from excessive output of a screen, A first step (S1) of judging whether or not a screen saver is enabled by a predetermined key input signal from a key input means; A second step S2 of turning off the on-screen display when the state of the screen saver is not in the enabled state as a result of the first step S1; A third step (S3) of determining whether or not a delay time occurs when the state of the screen saver is enabled as a result of the determination in the first step (S1); And a fourth step (S4) of moving the screen after forming a predetermined screen according to the determination result of the third step (S3).

Description

A method of screen saving of a power saving monitor using an on-screen display

The present invention relates to a method of protecting a screen of a power saving type monitor using an on-screen display, and in particular, by changing a monitor screen by a control signal from an on-screen display without using an application program for window and DOS, The present invention relates to a method of protecting a screen of a power saving type monitor using an on-screen display so that the monitor can be protected from unreasonable output of the screen.

Generally, a display monitor is a device for displaying information among various peripheral devices that process information of a host (host) to a system device that handles information on an image on a display screen. For example, in a personal computer apparatus, a peripheral device is provided with a printer that prints various kinds of information contained in a personal computer as a main device on paper, a display monitor that displays various information on a screen, a floppy disk driver (FDD) An auxiliary storage device such as a hard disk drive (HDD), and an information converting device (modem) for connecting various kinds of information to another computer through a telephone line.

The display monitor is the most convenient peripheral device that is always connected with the host device among the information system devices as a convenient device that can display the information of the host device most easily. In a typical system apparatus, one display monitor is required, but a plurality of monitors are required depending on the processing information amount of the system main unit, and the display monitor is also referred to as a display terminal. In addition, in order to display different information, the display terminal may be separated from the display monitor when a separate device (logic circuit) capable of receiving signals from the system master and a keyboard for driving the logic circuit is attached to the display terminal.

On the other hand, the monitor is almost similar to an antenna that receives a radio wave transmitted from a broadcasting station from a receiver of a television, and a tuner unit which processes the antenna to separate the antenna. The input signal form of the monitor is composed of an RGB signal, a horizontal synchronizing signal, and a vertical synchronizing signal, and the input signal is separated (here, a composite monitor and a monochrome monitor are excluded ), But is transmitted as a composite signal in which a synchronization signal is overlapped on a shape signal in a television broadcast.

Since the horizontal and vertical frequencies on the screen are freely selected on the screen, the TV receiver is suitable for a high resolution. In the television receiver, the signal band such as NTSC, PAL, SECAM, The deflection frequency is determined. In addition, since the composite signal has a limitation on the image band, the horizontal band and the vertical band, and the image band, the color carrier, and the horizontal and vertical deflection frequencies, the frequency can not be freely selected.

Meanwhile, the energy-saving monitor is a global dispute with the slogan of protecting only one earth. As a result of the global controversy, computer-related products using electricity to minimize environmental pollution such as nitrogen oxides, (EPA), and the Swedish Energy Department (NuTEK), which require energy conservation in many countries, and continue to require them to be applied to products produced by companies.

In addition, VESA (Video Electronics Standards Association), a corporation association, has released an industry standard in response to this, and now products are being introduced by manufacturers. In Korea, the announcement of the government policy in September 1992, announced the energy conservation products such as power saving, simplification of the type approval process in purchasing and installation, tax reduction, preferential purchase of government agencies, We are promoting to participate actively.

The power saving type monitor refers to a product whose power consumption is reduced to 30 W maximum or less at maximum by receiving a power saving signal from the computer when the user is away from home for a while without using the computer or is not using for a long time, Unlike the previous example, when the user wants to use again, the previous use screen automatically appears immediately.

In addition, when the power saving type monitor is operated in the energy saving mode, the color of the power indicator changes from green to yellow so that the user can recognize it. When the power indicator enters the power saving mode, the power indicator turns red again. However, The indicator will automatically switch from red to green and the screen will return to its original position. In addition, if a problem occurs in a computer signal due to application of a microprocessor application circuit, or if a signal connector is lost or loosened, the user will be informed that the screen adjustment indicator is blinking.

1 is a block diagram showing an example of a general power-saving type monitor. The monitor includes a connector 70, a power saving mode control circuit 72, an image amplification unit 74, a deflection circuit 76, an image output unit 78, and a power supply unit 80. Here, the energy saving mode signal is controlled by software in the computer. After a predetermined time, the power saving mode signal is automatically input from the computer to the monitor, so that all circuit operations are stopped so that the power consumption of the monitor can be reduced by up to 95% And only the necessary power of the power saving mode control circuit 52 is driven.

Conventionally, a window and a DOS application program have been used to protect a screen, and a separate program has to be purchased, and the monitor is not directly configured as hardware.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a display apparatus and a display apparatus, The present invention provides a method of protecting a screen of a power saving type monitor using an on-screen display in which the monitor can be protected from unreasonable output of the monitor.

According to an aspect of the present invention, there is provided a method of protecting a screen of a power saving monitor using an on-screen display capable of protecting a monitor from unreasonable output of a screen generated when a certain screen is continuously output, A first step of determining whether or not the screen saver is enabled by a predetermined key input signal from the key input means; A second step of turning off the on-screen display when the state of the screen saver is not in the enable state as a result of the first step; A third step of determining whether or not a delay time occurs when the state of the screen saver is in the enable state as a result of the determination in the first step; And a fourth step of moving the screen after forming a predetermined screen according to the determination result of the third step.

According to the present invention configured as described above, when a monitor screen is changed by a control signal from an on-screen display without using an application program for window and DOS, a monitor is generated from an unreasonable output of a screen, It can be protected.

1 is a block diagram showing an example of a general power-saving type monitor,

2 is a block diagram showing an embodiment of a power-saving monitor circuit using an on-screen display according to the present invention,

Figure 3 is a block diagram of the on-screen display control circuit shown in Figure 2;

4 is a flowchart illustrating a method of protecting a screen of a power-saving monitor using an on-screen display according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

13: video processor, 14: video switch,

15: Video output unit (CRT), 17: On-screen display (OSD)

20: luminance control circuit, 50: connector,

52: power saving mode control circuit, 54: image amplification section,

56: deflection circuit, 58: video output section,

60: Power supply (SMPS).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing an embodiment of a power saving monitor circuit using an on-screen display according to the present invention. The monitor circuit is composed of a video processor 13, a video switch 14, a CRT 15, an on-screen display 17, and a luminance control circuit 20.

Here, the video processor 13 detects and processes vertical and horizontal sync signals, which switch the RGB signals of the video processor 13 and the RGB signals of the on-screen display 17, The on-screen display 17 outputs RGB signals for displaying characters on the screen under the control of a microprocessor (not shown).

The brightness adjusting circuit 20 is connected between the on-screen display 17 and the video switch 14 so that an on-screen display output signal is adjusted by an ABL (Automatic Bright Limit) signal. The circuit 20 includes a first transistor Q1 connected to an output terminal B of the on-screen display 17 and varying a current flowing according to the ABL signal, and a second transistor Q1 varying in accordance with an output current of the transistor Q1. A second transistor Q2 connected to the G output terminal of the on-screen display 17 for varying the current flowing in accordance with the ABL signal, a first resistor R12 for increasing or decreasing the voltage level of the transistor Q2, A third transistor Q3 connected to the R output terminal of the on-screen display 17 for varying the current flowing in accordance with the ABL signal, and a second resistor R14 for increasing or decreasing the voltage level of the G output signal according to the current. And third resistance means R16 for increasing or decreasing the voltage level of the R output signal in accordance with the output current of the transistor Q3.

In FIG. 2, the R output signal of the on-screen display 17 has a constant magnitude, for example, And the G output signal of the on-screen display 17 is maintained at a constant magnitude due to the partial pressure of the division resistors R3 and R4 regardless of the ABL signal, And the B output signal of the on-screen display 17 is maintained at a constant magnitude due to the partial pressure of the division resistors R5 and R6 regardless of the ABL signal, .

The transistors Q1, Q2 and Q3 are added to the respective outputs from the RGB terminals to adjust the amounts of the currents flowing through the resistors R12, R14 and R16 according to the ABL signal, The luminance on the screen is changed by the on-screen display 17 by varying the magnitude of the voltage dropped by the on-screen display 17. At this time, the ABL signal is varied by the luminance of the main screen, and the screen of the on screen display 17 is interlocked with the main screen.

That is, when the brightness of the main signal is strong, the current flowing to the FBT (not shown) is large and the ABL voltage is low. As a result, the current flowing to the base of the first transistor Q1 increases, The current flowing through the emitter and the collector is increased. At this time, since the voltage dropping to the resistor R12 increases and the voltage level of the B output increases, the brightness of the on-screen display 17 also increases.

In addition, when the brightness of the main screen signal is strong, the current flowing to the FBT is high and the ABL voltage is low. As a result, the current flowing to the bases of the second and third transistors Q2 and Q3 increases, The current flowing through the emitter and the collector of the transistors Q2 and Q3 increases. At this time, the voltage dropped on the resistors R14 and R16 increases and the voltage level of the G and R outputs increases, so that the brightness of the on-screen display 17 also increases.

As the luminance of the main screen is increased, the ABL voltage is lowered, and thus the current flowing through the emitter and collector of the transistor is increased to increase the voltage level of the output terminal of the on-screen display, The luminance of the display device is also increased. Also, as the luminance of the main screen decreases, the ABL voltage increases, and thus the current flowing through the emitter and collector of the transistor is also reduced, thereby reducing the voltage level of the output of the on-screen display, .

On the other hand, the on-screen display (OSD) function displayed on the screen is a function for displaying characters or graphics such as time or channel number on the screen at the time of screen processing of the television and VTR. When the user operates the keys of the remote controller, So that the state of the key operation is indicated.

In order to implement such an on-screen display (OSD) function, the microprocessor decodes the inputted key signal and performs a predetermined program, and outputs control data such as data and clock for on-screen character generation to the on-screen display 17 The on-screen display 17 generates an RGB signal and a blanking signal for character display by the control signal such as clock and data output from the microprocessor and outputs the RGB signal and the blanking signal to the video switch 14.

The on-screen display 17 is basically composed of a character generating ROM, a video RAM, a column counter, a row counter, an output controller, and so on, By storing the address of the ROM, the desired character is displayed.

For example, Sony's CXD1050A on-screen display chip includes a microprocessor interface, a vertical synchronizer, a horizontal synchronizer, a horizontal position counter, a vertical position counter, an oscillator, a multiplexer, a data ROM, a character generator ROM, A display control register, a shift register, and an output section, and inputs a vertical synchronization signal, a horizontal synchronization signal, and an oscillation signal. Then, the microprocessor inputs control data through the I ² C bus, and outputs RGB signals and blank signals for character display.

Figure 3 is a block diagram of the on-screen display control circuit shown in Figure 2; The control circuit includes a control register 41, a vertical position register 42, a character size register 43, a horizontal position register 44, a boundary register 45, a clock generating unit 46, a display position control unit 47 A display control unit 48, a display RAM 49, a color register 50, a font memory 51, a boundary RAM 52, shift registers 53 and 54, a port control register 55, 56). On the other hand, the control circuit is generally configured inside the microprocessor.

3, the start position of the displayed character is set by the vertical position register 42 and the horizontal position register 44, the size of the character is set by the character size register 43, and the font of the displayed character Is stored in the font memory 51.

The font memory 51 is 8 Kbytes and stores 256 characters or symbols. For example, 32 bytes are required to store one character, and they can be accessed by these character codes. That is, when a character code is designated, the address of the corresponding font memory is designated and the corresponding character can be displayed.

In addition, in order to display data on the actual on-screen display, a character code for display is set in the display RAM 49. When a color register is designated, the document of the character code is displayed on the screen in the color of the designated color register 50 . At this time, in order to display a character on the screen, the display control bit of the CRT control register 41 must be set to display ON.

4 is a flowchart illustrating a method of protecting a screen of a power-saving monitor using an on-screen display according to an embodiment of the present invention. Hereinafter, a method of screen-saving a power-saving monitor using an on-screen display capable of protecting the monitor from unreasonable output of a screen, which occurs when a certain screen is continuously output, is as follows.

First, in the first step S1, it is determined whether or not the screen saver is enabled by a predetermined key input signal from the key input means. In the second step S2, as a result of the determination in the first step S1, If the status is not enabled, the on-screen display is turned off.

If it is determined in step S3 that the screen saver is in the enable state, it is determined whether the delay time is present. In the fourth step S4, the third step S3 , The screen is moved after the predetermined screen is formed.

On the other hand, if it is determined in step S1 that the screen saver is not in the enable state, the second step S2 determines whether the on-screen display is in the off state, Step 2-1 (S2-1); (S2-2) of shifting the on-screen display to the initial state after the on-screen display is turned off if it is determined that the on-screen display is not in the off state as a result of the second-step (S2-1).

In the third step S3, if it is determined that the screen saver is in the enable state as a result of the first step S1, it is determined whether or not the delay time is equal to or smaller than? T1. If not, 3-1 step (S3-1); A third-2 step (S3-2) of turning on the screen saver when the delay time is less than? T1 as a result of the third-step S3-1; In step S3-2, it is determined whether or not the movement delay time after the ON state of the screen saver is equal to or smaller than DELTA t2, and if not, the process moves to the initial state in step S3-3 (step S3-3) .

If the delay time is equal to or smaller than? T2 as a result of the 3-1 step (S3-1), the fourth step S4 is a step 4-1 )Wow; If it is judged in the step 4-1 (S4-1) that it is not the leftward movement, it is determined whether the rightward movement is the maximum rightward movement, and if it is the maximum rightward movement, the operation goes to the step 4-4 (S4-4) (S4-2); (S4-3) of performing rightward movement if it is not the maximum rightward movement as a result of the determination in the step 4-2 (S4-2); If it is judged in the step 4-1 (S4-1), it is judged whether or not the leftward movement is the maximum leftward movement, and if it is the maximum leftward movement, the operation goes to the step 4-2 (S4-2) (S4-4); (S4-5) of performing the leftward movement if it is determined that the maximum leftward movement is not the result of the determination in the step 4-4 (S4-4).

As described above, according to the present invention, since a monitor screen is changed by a control signal from an on-screen display without using an application program for windows and doses, an unreasonable output of a screen, which occurs when a certain screen is continuously output continuously The monitor can be protected.

Claims (4)

A method of protecting a screen of a power saving monitor using an on-screen display capable of protecting a monitor from unreasonable output of a screen generated when a certain screen is continuously output, A first step (S1) of judging whether or not a screen saver is enabled by a predetermined key input signal from a key input means; A second step S2 of turning off the on-screen display when the state of the screen saver is not in the enabled state as a result of the first step S1; A third step (S3) of determining whether or not a delay time occurs when the state of the screen saver is enabled as a result of the determination in the first step (S1); And a fourth step (S4) of moving the screen after forming a predetermined screen according to the determination result of the third step (S3). The method according to claim 1, wherein the second step (S2) determines whether the on-screen display is off when the status of the screen saver is not enabled as a result of the first step (S1) (2-1) (S2-1) of moving to the first step (S2-2) of shifting the on-screen display to the initial state after the on-screen display is turned off when it is determined in the second-step (S2-1) that it is not in the off state A method of protecting a screen of a power saving monitor using an on - screen display. 2. The method according to claim 1, wherein the third step (S3) determines whether or not the delay time is equal to or smaller than? T1 when the state of the screen saver is enabled as a result of the first step (S1) (3-1) (S3-1) of moving to the step (3-1); A third-2 step (S3-2) of turning on the screen saver when the delay time is less than? T1 as a result of the third-step S3-1; (S3-3) in which it is determined whether or not the movement delay time after the ON state of the screen saver is equal to or smaller than DELTA t2 in the third-2 < th > step (S3-2) Wherein the screen is protected by an on-screen display. The method as claimed in claim 1, wherein the fourth step (S4) includes a fourth step (4-1) of judging whether the predetermined time is shifted to the left when the delay time is equal to or smaller than? T2 as a result of the third step (S3-1) (S4-1); If it is judged in the step 4-1 (S4-1) that it is not the leftward movement, it is determined whether the rightward movement is the maximum rightward movement, and if it is the maximum rightward movement, the operation goes to the step 4-4 (S4-4) (S4-2); (S4-3) of performing rightward movement if it is not the maximum rightward movement as a result of the determination in the step 4-2 (S4-2); If it is judged in the step 4-1 (S4-1), it is judged whether or not the leftward movement is the maximum leftward movement, and if it is the maximum leftward movement, the operation goes to the step 4-2 (S4-2) (S4-4); (S4-5) of performing a leftward movement if it is determined that the leftward movement is not the maximum leftward movement as a result of the fourth-fourth step (S4-4). How to protect.