KR20040042327A - Automatic Configuration Of PC Monitor - Google Patents

Abstract

PURPOSE: A method for automatically setting monitor information is provided to allow a video output device to set monitor information using correct information about a video signal transmitted from a personal computer. CONSTITUTION: A personal computer transmits the first video signal according to current display information(S301). The personal computer changes display setting information such as resolution and/or color(S302). Then, a graphic controller outputs the second video signal corresponding to the changed display setting information to a video output device(S303). The video output device performs a basic setting operation(S304). The personal computer waits for a predetermined period of time(S305). The video output device receives display information(S306), and sets a system using the received information(S307). The video output device carries out basic display setting when there is no display information input to the video output device even after the predetermined period of time has elapsed(S308).

Description

Automatic Configuration of Monitor Information {Automatic Configuration Of PC Monitor}

The present invention relates to a method for automatically setting monitor information. In particular, when the image output apparatus is connected to a PC (personal computer) and used, the changed display setting information is changed when the display setting information (resolution, color, etc.) is changed in the PC. (Resolution, horizontal / vertical frequency, polarity, video signal pixel frequency, color information, etc.) is transmitted from the PC to the video output device, and the video output device can automatically perform the display setup using the received display information. A method for automatically setting monitor information.

Video output devices such as LCDs, CRTs, and PDPs are widely used not only for general television broadcasting, but also for monitors of personal computers (PCs), video display means such as DVDs and VCRs, and security systems. In particular, when the video output device is connected to a PC, it plays an important role as an interface means for providing high quality video information to users, including the display of various documents, videos, images, etc. and multimedia displays processed using the PC. do.

However, the video output device has a wide variety of types and specifications, and even a PC used in connection with the video output device supports various display settings according to user preferences or PC environment, so that the display setting information can be changed. It can be said that sufficient adaptation is required.

1 schematically shows a process of transferring information between a PC and an image output apparatus. The PC 100 is equipped with a PC operating system (OS) and / or an application program 101 and displays display information of a basic input / output system (BIOS) 102 and an image output device 120 that control input / output devices. A graphic controller 103 for processing is mounted to support an interface between the user 110 and the image output device 120.

The user 110 operates the PC 100 using an input device such as a keyboard or a mouse, and the PC 100 performs a task in response to the user operation based on the OS and / or the application program 101. The result of the execution is output to the image output apparatus 120 through the graphic controller 103, and such a user interface input and output is supported by the BIOS 102.

However, as described above, the user may change the display setting information of the PC according to not only the user's preference but also the usage environment of the PC. In this case, the PC 100 reads the characteristic data of the image output apparatus 120. Check whether the output signal is supported or change the output of appropriate video signal, sync signal, etc. through the graphic controller 103 using the default value in the PC, and these outputs are recognized by the video output device 120. The output is processed appropriately to the final output medium (CRT, LCD, etc.).

In FIG. 1, a signal line transmitted from the graphic controller 103 to the image output apparatus 120 is represented by a symbol a, and a signal line transmitted from the image output apparatus 120 to the graphic controller 103 is represented by a symbol b. As shown in FIG. 1, the connection between the PC and the image output apparatus is performed by connecting the graphic controller 103 and the image output apparatus 120 with a signal cable.

FIG. 2 schematically shows the connection and signal transmission relationship between the graphic controller 103 and the image output device 120. For example, the graphics controller 103 and the image output device 120 may be connected using a 15-pin D-type connector (VESA DDC version 2.0, etc.). In this case, the image output device from the graphic controller 103 may be connected. Reference numeral 120 shows R, G, B video signals, horizontal and vertical sync signals (Hsync, Vsync), and DDC (SCL, SDA 2 line) lines for data communication with the video output device.

Display Data Channel (DDC), as is known, is a specification that allows data exchange between a VGA board and a monitor, as defined by the international standards organization VESA, and the Display Data Channel (DDC) specification 1 specifies the horizontal frequency at which the VGA board boots. It is set for the purpose of setting the optimal monitor environment by transferring information such as vertical frequency to PC. DDC specification 2 monitors the information of the monitor when the VGA board boots up and recognizes the information. This specification is to set new information required for.

Looking at the operation between the graphics controller 103 and the image output device 120, the image signal inside the PC processed by the graphics controller 103 is supplied to the image output device 120 through the R, G, B signal lines, At this time, the horizontal synchronizing signal Hsync and the vertical synchronizing signal Vsync are also supplied, and data is transmitted from the graphic controller 103 to the image output device 120 based on the SCL and SDA lines for mutual data communication. Data is transmitted from the image output device 120 to the graphic controller 103.

Therefore, when the display setting information, for example, the resolution or the color, is changed according to the user's preference or PC environment, the PC reads the characteristic data of the image output apparatus 120 and outputs the image output apparatus for the signal to be output. Check whether or not the support, or the setting using the internal default value is supplied to the video output device 120 through the graphic controller 103 to the appropriate video signal, synchronization signal, and the like.

However, the graphics controller 103 alone is innumerable in its variety, and the types and signal formats of the video output apparatus 120 that can be supported are also innumerably diverse. It is impossible to know the correct information on all the video signals provided and to respond to them appropriately.

Therefore, from the standpoint of the image output apparatus, it is difficult to perform setting and application of the display information in an optimized state with respect to the change of the display setting information on the PC side, and it is difficult to accurately transmit the information to the image output apparatus on the PC side. For this reason, the accuracy of the input signal analysis is inferior, so the proper setting for the input is also difficult. Therefore, the display cannot be made with the video signal quality output from the PC as it is, resulting in problems of deterioration of screen quality and quality, and change of video resolution, color, horizontal / vertical frequency, polarity, and video signal pixel frequency. Did not respond properly. In addition, in order to accurately analyze the input signal of the image output apparatus, a lot of technical effort, time, and cost are required of the image output apparatus developer.

In particular, in the case of a video card installed in a PC, it is often possible to support a video output device of a slightly different type. Therefore, if a user selects wrong setting information that is different from the video output device in use, but support is possible. An error occurs in which the quality of the image signal output and displayed by the image output apparatus is not optimized, and in this case, the quality of the image is deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to automatically set up monitor information by enabling an image output apparatus to make display settings using accurate information on an image signal transmitted from a PC, thereby enabling high quality image display optimized for display settings of a PC. To provide.

Still another object of the present invention is to transmit the changed display information to an image output device using an existing DDC line when the display setting information is changed on a PC, and the image output device receives the transmitted display information and sets the corresponding information. By automatically performing internal settings optimized for the PC, it ensures accurate display information transmission between the PC and the video output device, and based on this, optimized display setting information is always shared between the PC and the video output device. An object of the present invention is to provide a method for automatically setting monitor information that can be compatible with display settings.

1 is a diagram illustrating an information flow according to monitor information setting.

2 is a block diagram illustrating a signal transmission relationship between a graphic controller and an image output apparatus;

3 is a view for explaining an information flow according to monitor information setting in the present invention;

4 is a diagram illustrating signal and data transmission timing according to monitor information setting in the present invention.

5 is a flowchart for explaining a method for automatically setting monitor information of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: PC201: OS / Application

202: BIOS203: Graphics Controller

210: user 220: video output device

In order to achieve the above object, the method for automatically setting monitor information according to the present invention comprises the steps of: checking whether a change of display setting information has occurred in a PC; Transmitting the received display setting information from the image output apparatus and performing internal display setting according to the information; Characterized in that comprises a.

In addition, in the automatic monitor information setting method of the present invention, the display setting information is information on resolution, color, horizontal / vertical frequency, polarity, and image signal frequency.

In addition, the automatic monitor information setting method of the present invention is characterized in that the basic setting is performed when the corresponding information is not received by the image output apparatus even after a predetermined time elapses after the change of the display setting information.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the method for automatically setting the monitor information of the present invention, the technical idea of the present invention transmits the information from the PC to the image output device when the change of the image display setting information occurs; Since the image output apparatus performs internal setting by using this information, the present invention is not limited to the drawings and embodiments to be described below, and is easily applied and changed by those skilled in the art within the scope of the technical idea of the present invention. This will be possible.

First, FIG. 3 schematically shows a signal transmission relationship between a PC and an image output apparatus for explaining the present invention. The PC 200 is equipped with an operating system (OS) and / or an application program 201, the BIOS 202 controlling an input / output device, and a graphic controller 203 for processing display information of the image output device 220. It supports the interface between the user 210 and the image output device 220.

The user 210 operates the PC 200 using an input device such as a keyboard or a mouse, and the PC 200 performs a task in response to the user operation based on the OS and / or the application 201. The result of the execution is output to the image output apparatus 220 through the graphic controller 203, and such a user interface input and output is supported by the BIOS 202.

As described above, the user may change the display setting information of the PC depending on not only the user's preference but also the environment of the PC. In this case, the display information is transmitted from the PC 200 to the image output device 220. The image output apparatus 220 performs display setting optimized for the setting by using the received setting information.

In FIG. 3, the symbol x represents an image signal of R, G, B and horizontal / vertical synchronization signal lines transmitted from the graphic controller 203 to the image output device 220, and the symbols y, z are transmitted through the DDC line. As information, y is a line through which the PC 200 reads information of the image output apparatus 220, and z is display information on an image signal and a synchronization signal currently output to the image output apparatus 220 by the PC 200. Is the line to send.

In FIG. 3, the connection between the PC 200 and the image output apparatus 220 is performed by connecting the graphic controller 203 and the image output apparatus 220 with a signal cable.

Looking at the connection and signal transmission relationship between the graphic controller 203 and the image output device 220, the graphic controller 203 and the image output device 220 uses a 15-pin D-type connector (VESA DDC version 2.0, etc.) In this case, the R, G, and B image signals, the horizontal and vertical synchronization signals (Hsync, Vsync), and the data of the image output device may be connected to the image output device 220 from the graphic controller 203. It uses DDC (SCL, SDA 2 line) line for communication.

Looking at the operation between the graphics controller 203 and the image output device 220, the image signal inside the PC processed by the graphics controller 203 is supplied to the image output device 220 using the R, G, B signal lines At this time, the horizontal synchronizing signal (Hsync) and the vertical synchronizing signal (Vsync) are also supplied, and data is transmitted from the graphic controller 203 to the image output device 220 based on the SCL and SDA lines for mutual data communication. Or data is transmitted from the image output apparatus 220 to the graphics controller 203.

Fig. 4 shows the relationship between the video signal / synchronization signal and the display information transmission timing of the DDC line when the display setting is changed. That is, when the display setting is changed from the video signal Video1 originally transmitted from the PC 200 and another video signal Video2 corresponding thereto is transmitted, the timing relationship in which the corresponding display information is transmitted through the DDC line is determined. Shows.

5 is a flowchart schematically showing a method for automatically setting monitor information according to the present invention. Step S301 is a step of sending the first video signal Video1 according to the display information currently set in the PC. As described above, the step S302 is a step of changing display settings according to a PC usage environment and the like, and changing display settings such as resolution and / or color.

When the display setting is changed in the PC 200, the graphic controller 203 mounted in the PC 200 outputs the second video signal Video2 corresponding thereto and supplies the same to the video output device 220 (S303). . Referring to FIG. 4, it is shown that the signal supplied from the PC 200 to the image output device 220 is changed from Video1 to Video2 at an arbitrary time t1.

The next step (S304) is a process of performing basic settings in the image output apparatus, and the image output apparatus 220 recognizes the change at the time t1 of change and prevents settings and screen transients for stabilizing internal operation. Is to do the basic setup.

Next step S305 is a step of waiting for a predetermined time Td. That is, the time output Td can be set so that the image output device 220 can achieve internal stability and prevent the user from showing the transient phenomenon (transient screen) that can be caused by the application of the display setting change. It is.

As described above, the PC 200 outputs the changed second video signal Video2 and transmits the display information of the second video signal Video2 to the video output device 220 before a predetermined time Td elapses. Output through the DDC line.

Therefore, in this case, the image output apparatus 220 receives the display information in the next step S306, and the image output apparatus 220 performs system setting by using the received information and transmits the information to the user. It is used (S307).

However, if there is no input of display information even after the set time Td, the image output device 220 proceeds to the basic screen setting and ends (S308).

In the present invention, the information transmitted from the PC 200 to the image output device 220 may be as much as necessary, but as described above, basically, the resolution, horizontal / vertical frequency, polarity, image signal pixel frequency, color, etc. The information is relevant.

According to the automatic monitor information setting method of the present invention, since the image output apparatus uses the display setting information provided by the PC, the internal setting is possible by using accurate information on the video signal, and thus basically the image quality produced by the PC. Can be displayed in an optimal state. In addition, it is possible to provide accurate information on the input video signal to the user.

In addition, since the system transmits the display setting information from the PC to the image output apparatus, compatibility with heterogeneous image information that is reviewed and developed in addition to the image information that has been previously determined may be secured. And since the display setting information is provided from the PC to the image output device, it is possible to reduce the time, effort, and cost that the image output device developer has to invest separately for accurate analysis of the input signal.

In particular, the automatic setting method of the monitor information according to the present invention does not require the addition of a separate hardware component, and has an advantage that it is easy to apply and implement since it conforms to a signal transmission standard between PC-video output devices that is already implemented. .

Claims (3)

Checking whether the display setting information has been changed in the PC; transmitting the setting information to the image output apparatus through the DDC line when the display setting information has been changed; and transmitting the transmitted display setting information at the image output apparatus. Receiving and performing internal display settings appropriately for the information; Automatic monitor information setting method characterized in that it comprises a. The method of claim 1, wherein the display setting information is information on resolution, color, horizontal / vertical frequency, polarity, and image signal pixel frequency. The method of claim 1, wherein after the change of the display setting information, if the corresponding information is not received by the image output apparatus even after a predetermined time elapses, basic setting is performed.