CN101950246A - Combined display equipment and picture control method and system thereof - Google Patents

Abstract

The invention relates to a combined display device and a picture control method and a picture control system thereof. The combined display equipment is arranged in a computer system and is provided with at least one graphic controller so as to output image data to a display for display. The picture control method comprises the following steps: firstly, providing a picture setting program to be installed in a computer system; secondly, starting a picture setting program to receive a setting command, wherein the setting command comprises specific block information of picture contents corresponding to the image data; then, according to the setting command, controlling a graphic driving program to form a control signal and outputting the control signal to a graphic controller; finally, the graphic controller captures a specific block of the image content corresponding to the image data output to the display according to the control signal, and scales the specific block of the image.

Description

Combined display device and its screen control method and system

technical field

The invention relates to a picture control of a display device, in particular to a picture control method and system of a combined display device.

Background technique

The TV wall is a combined display device that plays visual information. It consists of multiple displays that are stacked together to form a large screen display block. Airports, stations, financial institutions, large shopping malls and outdoor billboards often use this device to display real-time information or advertising images.

Existing combined display devices are generally composed of computer systems, each display is connected to the graphics controller of the host computer through a video interface, and the image data is output to the display for display by executing a multimedia player program. The previous graphics controller can only control the display to play video data in full screen. If the split screen is to be played, the image processing must be completed in advance by the front-end multimedia player program. Due to limited computer hardware and software resources, a single computer system is often unable to simultaneously complete screen division, calculation, processing and playback of multiple displays.

In order to achieve basic functions such as supporting diverse image sources and types, converting video formats corresponding to display types, cutting and zooming image data according to needs at any time, and other basic functions such as image processing, and flexible control of image composition, generally multiple computers are required. Individually control the screen display and image processing of each monitor, and a TV wall server is responsible for the overall control of the screen for all computers. However, this control structure is not only complicated, but also requires huge construction costs and management and maintenance costs.

At present, the primary problem facing the industry is how to simplify the screen control architecture of the combined display device, so as to reduce its construction cost and improve the convenience of subsequent management and maintenance. The inventor of this case is in view of the sophistication of various technologies at present, and the functions of various computer peripheral control components including display cards are also becoming more and more complete. Therefore, this project is proposed in order to break away from the inherent shackles of using the server control architecture to achieve screen segmentation, and to eliminate many shortcomings brought about by the conventional architecture.

Contents of the invention

The purpose of the present invention is to provide a combined display device and its screen control method and system. By providing a screen setting program, it controls the graphics controller to capture a specific block of the screen content corresponding to the image data output to the display. , and perform zoom processing on specific block screens, a single computer system can be used to complete the screen split display of the display, which not only reduces system construction costs, but also improves the convenience of management and maintenance.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A picture control method proposed according to the present invention is suitable for a combined display device installed in a computer system. The combined display device has at least one graphics controller to output an image data to a display for display. The screen control method includes the following steps: providing a screen setting program to be installed on the computer system; activating the screen setting program to receive a setting command, wherein the setting command includes a specific information on the screen content corresponding to the image data; Block information; according to the setting command, control a graphics driver to form a control signal to output to the graphics controller; and the graphics controller captures the corresponding screen content of the image data output to the display according to the control signal of the specific block, and perform zoom processing on the specific block screen.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

The aforementioned screen control method, wherein before the step of starting the screen setting program, further includes the following steps: providing a multimedia player program to be installed in the computer system; starting the multimedia player program to receive an image projection command; and according to the The image projection command controls the graphics driver to drive the graphics controller to output the image data to the display for display.

The aforementioned screen control method further includes the following steps: providing a combined display control program to be installed in the computer system; and activating the combined display control program to jointly activate the multimedia player program and the screen setting program.

The aforementioned screen control method, wherein the computer system is installed with an operating system, the graphics driver is installed in the operating system, the operating system has an application program interface, and the control signal is output to the The steps of the graphics controller further include the following steps: the screen setting program generates a system call in response to receiving the setting command, so as to control the graphics driver to form the control signal output to the graphics controller.

In the aforementioned picture control method, the graphics controller uses a block capture and scaling module to capture the specific block from the image data, and perform zoom processing on the specific block.

In the aforementioned picture control method, the setting command includes the coordinates of the anchor point of the specific block and the block size information.

The purpose of the present invention and the solution to its technical problem also adopt the following technical solutions to achieve. A picture control system proposed according to the present invention is set in a computer system to control at least one display for displaying. The picture control system includes: a graphics controller, which is coupled to the display; a graphics driver, which is Installed on the computer system to drive the graphics controller; a multimedia player program installed on the computer system to control the graphics driver to drive the graphics controller to output an image data to the display for display; and a screen The setting program is installed on the computer system to receive a setting command, wherein the setting command includes a specific block information of the screen content corresponding to the image data, the screen setting program and according to the setting command , controlling the graphics driver to form a control signal to output to the graphics controller; wherein the graphics controller captures the specific block of the screen content corresponding to the image data output to the display according to the control signal, and The specific block picture is zoomed.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

The aforementioned screen control system, wherein the computer system is installed with an operating system, the graphics driver is installed in the operating system, the operating system has an application program interface, and the screen setting program responds to the reception of the setting command , generating a system call to control the graphics driver to compose the control signal to output to the graphics controller through the API.

The aforementioned picture control system further includes: a combined display control program installed in the computer system to jointly start the multimedia player program and the picture setting program.

The aforementioned picture control system, wherein the graphics controller includes: a buffer memory (or called buffer memory) for temporarily storing the image data; a decoder for accessing the buffer memory to obtain the image data, and decode the image data into an original frame data, and output it to the buffer memory for temporary storage; a block capture and scaling module accesses the buffer memory to obtain the original frame data, and according to the control signal, converts The original frame data is converted into a target frame data, which is output to the buffer memory for temporary storage; and an encoder is used to access the buffer memory to obtain the target frame data, so as to encode the target frame data and output to the display.

In the aforementioned picture control system, the graphic controller expands the picture of the specific block to fit the full picture of the display according to the control signal.

In the aforementioned picture control system, the setting command includes the coordinates of the anchor point of the specific block and the block size information.

The purpose of the present invention and its technical problems are solved by adopting the following technical solutions in addition. A combined display device according to the present invention is provided in a computer system, which includes: at least one display and a picture control system. The picture control system includes: a graphics controller, which is coupled to the display; a graphics driver, which is installed in the computer system to drive the graphics controller; a multimedia player program, which is installed in the computer system to control The graphics driver drives the graphics controller to output an image data to the display for display; and a screen setting program is installed in the computer system to receive a setting command, wherein the setting command includes the image A specific block information of the screen content corresponding to the data, the screen setting program controls the graphics driver program to form a control signal to output to the graphics controller according to the setting command; wherein the graphics controller is based on the control signal and extracting the specific block of the screen content corresponding to the image data output to the display, and performing zoom processing on the screen of the specific block.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

The aforementioned combined display device, wherein the computer system is installed with an operating system, the graphics driver is installed in the operating system, the operating system has an application program interface, and the screen setting program responds to the reception of the setting command , generating a system call to control the graphics driver to compose the control signal to output to the graphics controller through the API.

In the aforementioned combined display device, the picture control system further includes: a combined display control program installed in the computer system to jointly start the multimedia player program and the picture setting program.

The aforementioned combined display device, wherein the graphics controller includes: a buffer memory for temporarily storing the image data; a decoder for accessing the buffer memory to obtain the image data and decoding the image data into an original Frame data is output to the buffer memory for temporary storage; a block capture scaling module accesses the buffer memory to obtain the original frame data, and converts the original frame data into a target image according to the control signal Frame data, output to the buffer memory for temporary storage; and an encoder, accessing the buffer memory to obtain the target frame data, so as to encode the target frame data and output to the display.

In the aforementioned combined display device, the graphics controller expands the specific block to fit the full screen of the display according to the control signal.

In the aforementioned combined display device, the setting command includes the coordinates of the anchor point of the specific block and the block size information.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. By virtue of the above technical solutions, the combined display device and its screen control method and system of the present invention have at least the following advantages and beneficial effects: The combined display device and its screen control method and system disclosed in the present invention are based on the screen setting program Receive an external setting command, control the graphics controller to capture the specific block of the image content corresponding to the image data output to the display through the graphics driver, and perform zoom processing on the specific block screen. In this way, the image segmentation processing is distributed to the graphics controller, thereby reducing the calculation burden of the central processing unit, and achieving the screen segmentation display function of the display using a single computer system, which not only reduces the system construction cost, but also improves the convenience of management and maintenance.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of the hardware system architecture of a specific embodiment of the combined display device and its picture control system of the present invention.

FIG. 2 is a schematic diagram of the software system architecture of a specific embodiment of the picture control system of the combined display device of the present invention.

FIG. 3 is a schematic diagram of the system architecture of the graphics controller of the present invention.

FIG. 4 is a schematic diagram of an application of display conversion of a single display screen of the present invention.

FIG. 5 is a schematic diagram of an application of the display conversion of the display screen of the combined display device of the present invention.

FIG. 6 is a flow chart of the steps of the screen control method of the combined display device of the present invention.

FIG. 7 is a flow chart of the steps of a specific embodiment of the screen control method of the combined display device of the present invention.

FIG. 8 is a schematic diagram of the software system architecture of another specific embodiment of the picture control system of the combined display device of the present invention.

10: Combined display device 20, 40, 50: Screen control system

21: Central Processing Unit 22: System Chipset

23: System memory 24: Image source

251, 252, 253, 254: graphics controller 2510: buffer memory (buffer memory)

2511: Decoder 2512: Block extraction scaling module

2513: encoder 271, 272, 273, 274: video interface

31, 32, 33, 34: display 310: specific block

41: Operating System 410: Application Programming Interface

42: Multimedia player program 43: Screen setting program

441, 442: Graphics Driver 443, 444: Graphics Driver

50: Combined screen control program H: Screen height

W: Screen width S100～S218: Process of each step

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation of the combined display device and its screen control method and system proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , steps, structures, features and functions thereof are described in detail.

The invention proposes a picture control system and method of a combined display device. The combined display device is generally called a video wall, which has multiple displays arranged and stacked in a rectangle, square matrix or other specific shapes, so that the screens together form a large picture.

First of all, please refer to Figure 1 and Figure 2 at the same time, Figure 1 is a schematic diagram of the hardware system architecture of a specific embodiment of the combined display device and its picture control system of the present invention, and Figure 2 is the picture control of the combined display device A schematic diagram of the software system architecture of a specific embodiment of the system. The combined display device 10 of this case is installed in a computer system to realize specific functions by utilizing its hardware and software resources.

As shown in FIG. 1 , the hardware structure of the combined display device 10 includes a plurality of displays 31, 32, 33, 34 and a picture control system 20, wherein the picture control system 20 is constructed in the host computer and includes a central Processor 21, a system chipset 22, a system memory (or called system memory) 23, an image source 24, a plurality of graphics controllers 251, 252, 253, 254, and a plurality of video interfaces 271, 272, 273, 274.

Wherein, the central processing unit 21 is the computing processing core of the computer system, and is coupled to the graphics controllers 251 , 252 , 253 , 254 via the bus bars of the north-south bridge system chipset 22 . The system memory 23 is used to cooperate with the CPU 21 to execute processing programs and temporarily store data. The image source 24 refers to the source of image data, which can be a storage medium such as a file system, an optical disc, or a hard disk, and can also be a communication socket connected to an external image database. The image data is stored and transmitted in a compressed video bit stream conforming to a video compression coding standard (eg, MPEG-1, MPEG-2, MPEG-4, H.264, etc.). In the video compression coding standard, video images are divided into multiple picture groups, and the picture groups are composed of picture frame data. When the image data is transmitted, the frame data is encoded and quantized according to the compression coding standard, and sent out according to the preset frame update frequency. The graphic controllers 251, 252, 253, 254 are respectively coupled to the displays 31, 32, 33, 34 via the video interface 271, 272, 273, 274, and can receive the image data transmitted by the image source 24, and restore it to the original image after decoding. The frame data, after image zoom processing, is then encoded into a signal format corresponding to the corresponding video interfaces 271, 272, 273, 274, and output to the displays 31, 32, 33, 34 for display.

It is particularly noted that the combined display device 10 may include one or more displays, here four displays 31, 32, 33, 34 are taken as an illustration, and the picture control system 20 correspondingly provides four graphics controllers 251, 252, 253, 254 and video interfaces 271, 272, 273, 274, but they are not used to limit the quantity of each component in this case. In addition, in the illustration, the graphics controllers 251, 252, 253, and 254 are coupled to the system chipset 22, but in practice, the graphics controllers can also be integrated in the central processing unit or the system chipset, or multiple graphics The controller package is fabricated as a single module.

Next, please refer to the software architecture of the screen control system 20 shown in FIG. 2 . As shown in FIG. 2 , the computer system is installed with an operating system 41 , a multimedia player program 42 and a screen setting program 43 . Graphics drivers 441 , 442 , 443 , 444 are installed in the operating system 41 to individually drive the graphics controllers 251 , 252 , 253 , 254 .

The multimedia player program 42 is an application program installed in the computer system. After starting, a user interface can be launched to receive an image projection command, and then control the graphics driver programs 441, 442, 443, 444 to drive the graphics controller according to the image projection command. 251, 252, 253, 254 output the image data to the displays 31, 32, 33, 34 for display. The frame setting program 43 is another application program installed in the computer system, which is used to control the capture of a specific block of the frame content corresponding to the image data. After the screen setting program 43 is started, a user interface can be opened to receive a setting command, and the setting command includes detailed information of the specific block to be captured. The picture setting program 43 then controls the graphics driver programs 441 , 442 , 443 , 444 to form control signals and output them to the graphics controllers 251 , 252 , 253 , 254 according to the setting command. And the graphics controllers 251, 252, 253, 254 individually capture the specific blocks of the screen content corresponding to the image data output to the displays 31, 32, 33, 34 according to the control signals, and match the screen aspect ratios of the individual displays. , to perform zoom processing on the picture of the specific block, so that the picture of the specific block can be expanded into a full-screen display.

The operating system 41 has an API 410 for communication between the multimedia player program 42 , the screen setting program 43 and the graphic drivers 441 , 442 , 443 , 444 . When the multimedia player program 42 receives the image projection command, it responds to the reception of the image projection command, and generates a system call to control the graphics driver programs 441, 442, 443, 444 to drive the graphics controllers 251, 252 through the application program interface 410. , 253, 254 output the image data to the displays 31, 32, 33, 34 for display. Similarly, when the screen setting program 43 receives the setting command, it will respond to the reception of the setting command, and generate a system call, and control the graphic driver 441, 442, 443, 444 through the application program interface 410 to form a control signal Output to graphics controllers 251 , 252 , 253 , 254 .

In addition, with regard to the design details of the screen setting program 43, those who are familiar with computer programming can use the function description of this case to select a programming language, cooperate with the exclusive call instructions of graphics drivers of different specifications, and write an appropriate application program. Run on the computer system to achieve the required functions, so the compilation of the screen setting program 43 will not be described in detail here.

Please refer to FIG. 3 , which is a schematic diagram of the system architecture of the graphics controller 251 . As shown in FIG. 3 , the graphics controller 251 includes a buffer memory 2510 , a decoder 2511 , a block capture and scaling module 2512 , and an encoder 2513 . The buffer memory 2510 is used for temporarily storing data, and can be an independent memory dedicated to the graphics controller 251 , or share memory resources of the system memory 23 .

The image data from the image source 24 is first temporarily stored in the buffer memory 2510, and the image data is compressed frame data. The decoder 2511 obtains image data from the buffer memory 2510, decodes the image data into an original frame data, and sends it back to the buffer memory 2510 for temporary storage. The block extraction and scaling module 2512 obtains the original frame data from the buffer memory 2510 according to the control signal sent by the graphics driver 441, and according to the information contained in the control signal, extracts a specific block of the screen content corresponding to the image data, and Scaling and zooming is performed on the specific block to match the expansion and enlargement of the display screen, so that the original frame data is converted into a target frame data and sent back to the buffer memory 2510 for temporary storage. The encoder 2513 accesses the buffer memory 2510 to match the transmission signal format of the video interface 271 to encode the target frame data and output it to the display 31 .

Previous graphics controllers do not have a block capture and scaling module, but only have a simple image scaling function, and the frame data is scaled according to the aspect ratio of the display screen, so that the content of the image corresponding to the image data fits the display screen.

The graphics controllers 251, 252, 253, and 254 in this case are equipped with individual block capture and scaling modules, which can convert the original frame data into target frame data with individual block capture and scaling modules according to the requirements of the control signal , so as to capture the specific block of the screen content corresponding to the image data, and match the screen aspect ratio of the display to perform scaling processing on the screen of the specific block to conform to the screen output screen of the display. By distributing the splitting operation of the image screen to the graphics controllers 251, 252, 253, 254 to reduce the computing load of the central processing unit, the splitting screen display function can be realized by a single computer system.

The block capturing and zooming module utilizes digital signal processing technology to complete image processing procedures such as frame specific block capturing and frame zooming. Wherein, a specific implementation manner of extracting a specific block of the screen is that the block extracting and scaling module only selects data corresponding to a specific block from the buffer memory, and then performs scaling processing on the selected data to obtain target frame data. A specific embodiment of image zooming can use a filter to achieve the image zooming processing function.

Next, please refer to FIG. 4 and FIG. 5 . FIG. 4 is a schematic diagram of an application of display switching of a single display of the present invention, and FIG. 5 is a schematic diagram of application of display switching of display screens of a combined display device of the present invention.

As shown in Figure 4, the display 31 has a screen height H and a screen width W. When selecting a specific block 310 in the upper left quarter area of the screen content of the display 31, it is desired to control the display 31 to display this in full screen. When the block 310 is specified, information such as the coordinates of the anchor point and the block size of the specific block 310 can be input through the screen setting program 43 to form a setting command. Generally speaking, the upper left corner of the screen is positioned as (0, 0) in the display screen, and the screen height H and screen width W are represented by pixel values. In this example, information such as positioning coordinate point (0, 0) and block size (W/2×H/2) is input through the user interface of the screen setting program 43 to form a setting command to control the graphics controller 251 captures the specific block 310 of the screen content corresponding to the image data, and expands and enlarges the specific block 310 so as to conform to the full screen output of the display 31 . After this setting conversion procedure, the screen of the display 31 can be controlled to display the specific block 310 in full screen.

As shown in Figure 5, based on the same principle, the upper right, lower left, and lower right quarter areas of the corresponding screen content of the display 32, 33, and 34 image data can be respectively selected as specific blocks of individual displays, and input their Individual positioning coordinates (W/2, 0), (0, H/2), (W/2, H/2) and the same block size (W/2×H/2). In this way, the displays 31 , 32 , 33 , and 34 can be controlled to jointly present a complete image data frame.

The following is an explanation of the picture control method of the combined display device in this case, which is suitable for controlling the picture display of the display device in the combined display device. Please refer to FIG. 6 , which is a flow chart of the steps of the screen control method of the combined display device. Please refer to Figure 1 and Figure 2 for the system architecture. The present invention discloses a picture control method, which is suitable for a combined display device 10 installed in a computer system. The combined display device 10 has graphics controllers 251, 252, 253, 254 to output image data to the display 31, 32, 33, 34 for display. As shown in Figure 6, the picture control method includes the following steps:

First, a screen setting program 43 is provided to be installed in the computer system (step S100);

Next, start the screen setting program 43 to receive a setting command, and this setting command includes a specific block information of the screen content corresponding to the image data (step S102);

Thereafter, according to the setting command, one or more of the graphics drivers 441, 442, 443, 444 are controlled to form a control signal and output to the corresponding graphics controller 251, 252, 253, 254 (step S104) ;as well as

Finally, among the graphics controllers 251, 252, 253, and 254, the graphics controller that receives the control signal extracts the specific blocks of the screen content corresponding to the image data that are individually output to the display according to the control signals, and The image is scaled to match the screen image of the display (step S106).

Wherein before step S102, first provide a multimedia player 42 to be installed in the computer system; secondly, start the multimedia player 42 to receive an image projection command; then, according to the image projection command, control the graphics driver 441, 442, 443, 444 drive graphics controllers 251, 252, 253, 254 to output image data to displays 31, 32, 33, 34 for display.

Please continue to refer to FIG. 7 , which is a flow chart of the steps of a specific embodiment of the screen control method of the combined display device of the present invention. In this example, firstly, start the multimedia player program 42, thereby receiving an image projection command (step S200); secondly, control the graphics drivers 441, 442, 443, 444 to drive the graphics controllers 251, 252, 253 according to the image projection command , 254, to output the image data to the display 31, 32, 33, 34 for display (step S202); thereafter, the graphics driver 441, 442, 443, 444 responds to the multimedia player 42, and drives the graphics controller 251, 252 , 253, 254 (step S204); then, the graphics controller 251, 252, 253, 254 controls the display 31, 32, 33, 34 to display the image data in full frame (step S206).

On the other hand, start the screen setting program to receive a setting command, which includes specific block information of the screen content corresponding to the image data (step S210); secondly, control the graphics driver program according to the setting command One or more of 441, 442, 443, 444 controls the graphics driver to compose a control signal to output to the corresponding graphics controller (step S212); thereafter, the graphics driver related to the setting command responds to the screen setting program 43 , the composition control signal is output to the corresponding graphics controller (step S214).

Furthermore, after step S206, the graphic controller judges whether a control signal is received, and if the control signal is received, then according to the control signal, the individual block capture and scaling modules capture the frames corresponding to the image data output to the display. The specific block of the content, and the specific block screen is zoomed, and the display is controlled to show the specific block screen in full screen. If the image data is not received, the display is still controlled to display the image data in full screen (step S216) ; Finally, according to the judgment result of step S216, control the screen display of the display (step S218).

Finally, please refer to FIG. 8 , which is a schematic diagram of the software system architecture of another specific embodiment of the picture control system of the combined display device of the present invention. In this example, the picture control system 50 further includes a combined display control program 51, which is an application program installed in the computer system, which can jointly start the multimedia player program 42 and the picture setting program 43, so that the operation process of the picture setting more convenient.

From the detailed description of the above examples, it can be known that the combined display device and its screen control method and system of the present invention distribute the screen split display processing to the graphics controller, thereby reducing the calculation burden of the central processing unit and achieving the goal of using a single computer. The system completes the screen split display function, which not only reduces the system construction cost, but also improves the convenience of management and maintenance.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (18)

1. A picture control method, suitable for a combined display device installed in a computer system, the combined display device has at least one graphics controller to output an image data to a display for display, characterized in that The picture control method includes the following steps: Provide a screen setting program to be installed on the computer system; Start the screen setting program to receive a setting command, wherein the setting command includes a specific block information of the screen content corresponding to the image data; controlling a graphics driver to form a control signal output to the graphics controller according to the setting command; and According to the control signal, the graphics controller captures the specific block of the image content corresponding to the image data output to the display, and performs scaling processing on the specific block screen. 2. The picture control method according to claim 1, further comprising the following steps before the step of starting the picture setting program: providing a multimedia player program to be installed on the computer system; start the multimedia player program to receive an image show command; and According to the image projection command, control the graphics driver to drive the graphics controller to output the image data to the display for display. 3. The picture control method according to claim 2, further comprising the following steps: providing a combined display control program to be installed on the computer system; and Start the combined display control program to jointly start the multimedia player program and the screen setting program. 4. The picture control method according to claim 1, wherein said computer system is installed with an operating system, the graphics driver is installed in the operating system, and the operating system has an application program interface. The step of the graphics driver composing the control signal output to the graphics controller also includes the following steps: The screen setting program generates a system call in response to receiving the setting command, so as to control the graphic driver to compose the control signal to output to the graphic controller through the application program interface. 5. The image control method according to claim 1, wherein the graphics controller uses a block capture zoom module to capture the specific block from the image data, and the image of the specific block Perform scaling. 6. The image control method according to claim 1, wherein the setting command includes coordinates of the anchor point of the specific block and block size information. 7. A picture control system is located in a computer system to control at least one monitor for display, characterized in that the picture control system includes: a graphics controller coupled to the display; a graphics driver installed in the computer system to drive the graphics controller; a multimedia player program installed in the computer system to control the graphics driver to drive the graphics controller to output an image data to the display for display; and A screen setting program is installed on the computer system to receive a setting command, wherein the setting command includes a specific block information of the screen content corresponding to the image data, the screen setting program and according to the setting A predetermined command is used to control the graphics driver to form a control signal and output it to the graphics controller; Wherein the graphics controller captures the specific block corresponding to the image data output to the display according to the control signal, and performs scaling processing on the specific block screen. 8. The picture control system according to claim 7, wherein said computer system is installed with an operating system, the graphics driver is installed in the operating system, the operating system has an application program interface, the screen The setting program generates a system call in response to receiving the setting command, so as to control the graphics driver program to form the control signal output to the graphics controller through the application program interface. 9. The picture control system according to claim 7, characterized in that it also comprises: A combined display control program is installed in the computer system to jointly start the multimedia playing program and the screen setting program. 10. The picture control system according to claim 7, wherein said graphics controller comprises: a buffer memory for temporarily storing the image data; A decoder accesses the buffer memory to obtain the image data, decodes the image data into an original frame data, and outputs it to the buffer memory for temporary storage; A block capture and scaling module accesses the buffer memory to obtain the original frame data, converts the original frame data into a target frame data according to the control signal, and outputs it to the buffer memory for temporary storage; as well as An encoder accesses the buffer memory to obtain the target frame data, and outputs the target frame data to the display after encoding. 11. The picture control system according to claim 7, wherein said graphics controller expands the picture of the specific block to fit the full picture of the display according to the control signal. 12. The image control system according to claim 7, wherein the setting command includes coordinates of the anchor point of the specific block and block size information. 13. A combined display device installed in a computer system, characterized in that it comprises: at least one display; and One screen control system, including: a graphics controller coupled to the display; a graphics driver installed in the computer system to drive the graphics controller; a multimedia player program installed in the computer system to control the graphics driver to drive the graphics controller to output an image data to the display for display; and A screen setting program is installed on the computer system to receive a setting command, wherein the setting command includes a specific block information of the screen content corresponding to the image data, the screen setting program and according to the setting A predetermined command is used to control the graphics driver to form a control signal and output it to the graphics controller; Wherein the graphics controller captures the specific block corresponding to the image data output to the display according to the control signal, and performs scaling processing on the specific block screen. 14. The combined display device according to claim 13, wherein the computer system is installed with an operating system, the graphics driver is installed in the operating system, the operating system has an application program interface, and the screen setting The routine responds to the reception of the setting command and generates a system call to control the graphics driver to form the control signal and output it to the graphics controller through the application program interface. 15. The combined display device according to claim 13, wherein the picture control system further includes: A combined display control program is installed on the computer system to jointly start the multimedia playing program and the screen setting program. 16. The combined display device according to claim 13, wherein said graphics controller comprises: a buffer memory for temporarily storing the image data; A decoder accesses the buffer memory to obtain the image data, decodes the image data into an original frame data, and outputs it to the buffer memory for temporary storage; A block capture and scaling module accesses the buffer memory to obtain the original frame data, and converts the original frame data into a target frame data according to the control signal, and outputs it to the buffer memory for temporary storage; and An encoder accesses the buffer memory to obtain the target frame data, so as to encode the target frame data and output it to the display. 17. The combined display device as claimed in claim 13, wherein the graphics controller expands the specific block to fit the full screen of the display according to the control signal. 18. The combined display device according to claim 13, wherein the setting command includes coordinates of the anchor point of the specific block and block size information.

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