There are generally two screens and four screens.
Multi-screen card is a kind of graphics card, which is inserted into the PCI slot of the computer. Install the driver and you can use it. If a four-screen card is used, four monitors can be arranged in a row for splicing. Pretty cool! Ha ha! But this is mostly used for professional occasions, design, production, medical care, monitoring, or other functions.
Professional multi-screen cards are expensive, ranging from 3 thousand to 10 thousand yuan each.
The simplest way, you can use two VGA output or two DVI output graphics cards, and you can cooperate with the driver to make a dual-screen extended display. It's also very cool!
The following is the explanation of multi-screen card.
Multilayer screen
Multi-screen card is a special graphics card with different names, including multi-screen card, multi-screen display card, multi-head card and multi-head display card. If your job is to deal with a lot of information, such as images, words, videos and so on. You should be busy with frequent switching of various applications. Even a 25-inch monitor can't meet your requirements. Do you want a bigger screen? Or there are several monitors for you to use at the same time, and you want to display different application windows in your computer on each monitor or display the same content by splicing, then you need a multi-screen display card to help you.
Multi-screen graphics card can make a PC support multiple monitors/TVs; Display different pictures on different screens, and several monitors/TVs can be combined to form a big picture; The mouse can roam freely between multiple screens, move the cursor smoothly from one screen to any other display, expand any application from occupying one screen to occupying two or more screens, and switch different applications between different screens at will. In addition, a computer can install multiple cards at the same time, choose the number of screens at will, and arrange the screen modes at will; This will give you more display information and be more comfortable and convenient.
Multi-screen cards can display all kinds of software and information you need on their respective screens at the same time. For example, to process a word list, you can directly drag this EXCELL file from WINDOWS Explorer to the word list processing software. Or maximize the opening of the web browser and email manager on two screens. The advantage of multi-screen display card is not only that it can enlarge and widen the working window size, but more importantly, it can realize more different working windows through a PC, which provides a broad field for your work.
Application field of multi-screen graphics card
Large screen splicing (splicing cg animation, splicing dynamic video) projection wall; Public security, military, railway, transportation, aerospace, post and telecommunications, satellite launch and other command and dispatch systems; Graphic image editing, three-dimensional animation, multimedia design; Process control in industrial field; Securities trading, futures and bank information display; CAD/CAM design, typesetting and editing system, video image editing.
Number of screens supported by multi-screen card
The number of supported screens is the most important technical index of multi-screen graphics cards. At present, the common multi-screen graphics card can support 2 screens, 4 screens and 8 screens, which are basically the square of 2. Theoretically, you can expand the number of screens supported by the system by inserting a multi-screen graphics card, and also consider the number of PCI slots on your computer motherboard. If you need to display more screens, but there are fewer PCI slots, then you should make reasonable calculations when purchasing and choose a multi-screen graphics card that supports more screens.
What display chipset does the multi-screen card use?
Like ordinary graphics cards, the performance of multi-screen graphics cards depends largely on the performance of the display chipset. It uses multiple chipsets to support multi-screen display. Buyers can understand the performance of multi-screen cards by knowing the information of display chips.
Resolution supported by multi-screen card
Resolution is no stranger to friends with graphics cards and monitors. As a device supporting display output, the resolution of multi-screen graphics card is also a very important technical performance index of multi-screen graphics card. Just like choosing an ordinary graphics card, it is enough to know the format type, quantity and resolution supported by the product, as well as the refresh rate and color in this case.
Multi-screen display mode and control supported by multi-screen card
At present, there are two modes to drive the universal multi-screen graphics card. One is to directly use Windows 98/2000/XP and other operating systems to support multi-screen display. In this driving mode, each output port can be set with different resolution, which is more suitable for fields that need multi-task and multi-display windows. For example, another display mode of AutoCAD is called overlay display mode. In this mode, it is easier to display a display window or application program by splicing multiple screens, such as screen wall splicing and industrial process control configuration software display. Design, web design, text typesetting, stock display and other fields.
No matter what kind of display driving mode, the arrangement of display screen in application can't be fixed, so how to switch and adjust the operation mode is very important. Different manufacturers have different product designs. For example, the HYDRAVISION multi-screen control software provided by Appian company enables customers to conveniently control multi-window and multi-task display.
Multi-screen card output interface type
In addition to conventional monitors, multi-screen graphics cards may also support video output devices such as televisions (such as Taiwan Province Video-UFO graphics cards with video output ports), so the types of input and output interfaces it supports are also very important. Common interfaces include VGA interface, DVI interface and video interface.
Multi-screen card extension function
Some multi-screen graphics cards have many accessories to enhance their functions, which can make them more powerful. So when shopping, you should choose according to your actual situation. NTSC/PAL/SECAM video capture chips are added to multi-screen cards, such as Jpro four-screen card of Appian company and PROMEDIA four-screen card of COLOGRAPHIC company, all of which have video capture chips. This option enables multi-screen card products to play external video source signals under the playing software provided by multi-screen cards, and play them in the form of windows on the display.
Multi-screen card supports 3D, OpenGL and other technologies.
At present, the application of computers has entered the 3D era, and 3D functions have become very common in ordinary graphics cards. However, the 2D card and 3D card of multi-screen graphics card are different, and some products without 3D function cannot realize 3D display function. Therefore, for some users who need 3D display, they must buy a multi-screen card with 3D display function, and of course the price will be much more expensive.