This article is mainly about the related introduction of LCD screen splicing, and focuses on the working principle and application of LCD screen splicing in detail.
LCD splicingLCD splicing according to different usage needs, realizes the screen split single-screen display or multi-screen display with a variety of large-screen functions: single-screen split display, single-screen independent display, arbitrary combination display, full-screen LCD splicing, double splicing LCD splicing screen, vertical screen Display, the image frame can be compensated or covered, supports digital signal roaming, zooming and stretching, multi-screen display, setting and running of various display plans, and real-time processing of full HD signals.
LCD splicing can be used as a monitor alone, or spliced ​​into a super large screen. According to different needs, realize the screen split single-screen display or multi-screen display versatile large-screen function: single-screen split display, single-screen single display, arbitrary combination display, full-screen LCD splicing, double splicing LCD splicing screen, vertical screen display, The image frame can be compensated or covered, supporting digital signal roaming, zooming and stretching, multi-screen display, setting and running of various display plans, and real-time processing of full HD signals. The LCD splicing is a complete product, which is ready to use, and the installation is as simple as building blocks. The use and installation of single or multiple LCD splicing are very simple. The surrounding edge of the LCD splicing is only 6.7mm wide, and the surface is also covered with a protective layer of toughened glass, a built-in intelligent temperature control alarm circuit and a unique "quick dissipating" heat dissipation system. It has everything. It not only adapts to digital signal input, but also uniquely supports analog signals. In addition, there are many LCD splicing signal interfaces. The use of LCD splicing technology enables simultaneous access of analog and digital signals. The LCD splicing series products use unique and the world's most cutting-edge digital processing technology, allowing users to truly experience the full HD large screen effect.
Advantages of LCD splicing1. The LCD splicing screen has long life and low maintenance cost. Liquid crystal is the display device with the longest lifespan. It has a very long lifespan. Even the shortest life-span backlight part can reach more than 50,000 hours, and even if it is used for more than such a long time, it will only affect its brightness. , Just replace the backlight tube, you can restore the original bright colors. This is essentially different from the rear projection. The life of the LCD backlight is ten times that of the rear projection bulb; the biggest difference from the projection is that the LCD splicing technology is more mature and the power saving is obvious, and its advantages and disadvantages are self-evident.
2. Large viewing angle of LCD splicing screen. For the early liquid crystal products, the viewing angle was once a big problem that restricted the liquid crystal, but with the continuous advancement of liquid crystal technology, this problem has been completely solved. The DID LCD screen used in the LCD splicing curtain wall has a viewing angle of more than 178 degrees, which has achieved the effect of absolute viewing angle.
3. The LCD splicing screen has high resolution and bright pictures. The dot pitch of the liquid crystal is much smaller than that of the plasma, and the physical resolution can easily reach and exceed the high-definition standard. The brightness and contrast of the liquid crystal are high, the colors are bright and bright, the pure plane display is completely free of curvature, and the image is stable and does not flicker.
4. The LCD splicing screen is ultra-thin and lightweight. The liquid crystal has the characteristics of thin thickness and light weight, which can be easily spliced ​​and installed. The 40-inch dedicated LCD screen weighs only 12.5KG and has a thickness of less than 10 cm, which is unmatched by other display devices.
5. Low power consumption and low heat generation. Liquid crystal display equipment, low power, low heat has always been praised by people. The power of a small-size LCD screen is not more than 35W, and the power of a 40-inch LCD screen is only about 150W, which is only about one-third to one-fourth of that of plasma.
6. The LCD splicing screen has a long trouble-free time and low maintenance cost. Liquid crystal is currently the most stable and reliable display device. Due to the small heat generation, the device is very stable and will not cause failure due to excessive temperature rise of the components.
7. Innovation and advancement
The 46-inch ultra-narrow-edge LCD splicing has only 1.4mm seams, and the 55-inch LED backlight ultra-narrow-edge LCD splicing is only 1.8mm, which is the most advanced LCD splicing at present. Samsung is also developing a splicing that can pass through the side seams through a similar glass type, which will become a cross-epoch period of DID liquid crystal splicing.
Of course, since the backlight luminous body of liquid crystal products still uses cathode vacuum tubes (CCFL), the filaments and tube sockets at both ends of the tube limit the liquid
The size of the crystal panel, the frame of the DID LCD screen used in the 2013 screen mosaic still has a width of 4.9mm-22mm, so a slightly larger splicing seam is the only disadvantage of the LCD splicing curtain wall, but with the investment of BSR-LED backlight technology , This defect will be significantly improved.
8. Economy
Considering the economy of the system, it should be considered from the perspective of cost performance. The economy of the system is meaningful only under the premise of high performance and high quality.
9. Well-known LCD splicing brands: Samsung, LG, etc.
Plasma (PDP) splicing curtain walls on the market, but their prices are relatively high, generally the price per square meter is as high as hundreds of thousands, which is more expensive than LCD splicing curtain walls, and due to its inherent defects, the cost performance is lower. Although the price of DLP TV wall is relatively low, the replacement cost of light bulbs per year is as high as several thousand per screen. A curtain wall can add up to tens of thousands to as many as tens of thousands. After a few years, the cost is staggering.
LCD splicing curtain wall, with its excellent performance and reasonable price, has been widely welcomed at home and abroad. With a service life of 50,000 to 80,000 hours, stable quality and low maintenance costs, it is currently the most cost-effective curtain wall.
The emergence of LCD splicing curtain wall solves the various defects of traditional TV curtain wall, and provides the best large-screen display system for convenient, comprehensive, and real-time display of video information of various systems, especially for remote real-time command, dispatch and other engineering applications.
A splicer can only specify one window as the CBD display area;
Set as the window of the CBD area, it can realize the superimposed display of all the windows of the CBD input signal;
The display window of the CBD signal area can be an independent display unit, a complete display splicing wall, or a partial splicing wall composed of some independent display units;
The maximum number of openings of the CBD display window depends on the number of hardware inputs input by the CBD. The standard configuration is: display 4 channels of VGA or video signals at the same time; the signal input from the CBD can only be moved within the CBD window, and cannot exceed the window range of the CBD output;
The CBD display area can form more display modes with other sub-input channels;
After multiple IWS-4P splicers are cascaded, multiple CBD signal display windows can be opened on the large splicing wall;
Use a separate computer with RS232 interface or network socket to connect to the large-screen image processor for window operations: perspective, picture-outside-picture tiling, picture-in-picture, window overlay, window roaming, window perspective and zoom;
The number of input channels of CBD can be configured in advance, up to 12 channels;
The technical principle of LCD screen splicingResolution introduction
The resolution of the LCD splicing screen is an important indicator related to the display image format. Generally, the resolution we refer to refers to the physical resolution of the LCD screen, that is, the number of points displayed on the screen, which is the horizontal and vertical pixel values. This value determines the clarity of the LCD screen.
By 2013, the mainstream resolutions of LCD splicing screen products are 1366×768 and 1920×1080, which are in line with the usual 16:9 widescreen ratio. 1366×768 is the minimum resolution limit that meets the national high-definition TV standard. In the future of high-definition television signals, there are mainly three formats, namely 720p, 1080i and 1080p. The popular Blu-ray BD and HD DVD also use these three formats.
Some businesses like to make a fuss about the concept of "resolution", and advertise some small-sized LCD screens with a physical resolution of only 1366×768 as the highest supported resolution of 1920×1080. In fact, there is a trap here. Consumers are misled because of the terms "physical" and "highest support." How wide the screen and how high the pixels can be displayed on the LCD screen depends entirely on its physical resolution. A TV that advertises that it supports up to 1920×1080 resolution actually only indicates that the product supports the 1920×1080 signal input format. In addition to the panel characteristics, it is also related to the TV’s driver decoding technology, but in fact, if the panel If the physical resolution is only 1366×768, when such a panel displays a 1920×1080 signal picture, it is not a one-to-one corresponding point-to-point display, but the 1920×1080 signal is converted through image conversion. The 1366×768 format that conforms to the panel output is then presented to the audience, and this conversion process will inevitably be accompanied by the compression and loss of the picture effect, and the user sees the quality of the original 1920×1080 picture.
In addition, we need to remind everyone that the resolution and the screen aspect ratio are actually not the same. In general, the horizontal and vertical pixel pitch of the screen pixels are the same, that is to say, the pixels are square, so the resolution parameter ratio can be regarded as the screen aspect ratio, for example, a panel screen with a resolution of 1366×768 The ratio is 16:9. However, some products have different horizontal and vertical pixel pitches, which means that the pixels are rectangular. At this time, the resolution parameter cannot show the aspect ratio of the screen. For example, the resolution is 1024× There is no contradiction between a 1024 product and a product with a 16:9 screen ratio. 1024×1024 does not mean that the product’s screen is square.
Distributed control technology
Distributed signal control technology is the patented control of IWS splicing processor
One of the technologies is that each independent module is used in the splicer to process in parallel. Before the signal is input to the splicer, it is necessary to complete the signal scheduling and control through proprietary technology to achieve the balance between the signal transmission of each channel and the hardware bandwidth.
For signals entering the non-public area, each window signal corresponds to an independent processing module and controls the display content of the corresponding display unit; the external matrix completes the signal distribution and scheduling switching; for unimportant signals, enter the CBD area. During window operation, according to different window display modes, the matrix completes the micro-distribution of the corresponding signals. In some special cases, if you need more display bandwidth, you can release part of the display function of the base map to increase bandwidth requirements.
Principle action
LCD splicing is a professional terminal display device specially designed for engineering applications. It uses FPGA array as the hardware foundation and uses parallel high-speed graphics processing technology to realize the unified processing of multiple high-speed video signals, fundamentally replace the plug-in splicing controller, and solve the problem that the number of VGA signal inputs is limited. It combines the most outstanding high-definition, high-brightness and high-color gamut liquid crystal display technology, embedded hardware splicing technology, multi-screen image processing technology, signal switching technology, etc. into one, forming a high-brightness, high-definition , Low power consumption, long life, advanced LCD splicing curtain wall display system. The LCD splicing curtain wall is a brand-new large-screen splicing method, which can be spliced ​​infinitely. Flat panel splicing display technology will be the mainstream application technology of the next generation splicing display system. After years of development, liquid crystal display technology has occupied an important position in the field of flat panel splicing displays. The splicing curtain wall is ultra-light, ultra-thin, long-life, low maintenance cost, low power consumption, no radiation, high-definition, outstanding advantages, and attracts attention. LCD splicing curtain wall, with LCD screen as the basic display unit, integrating the latest LCD technology and pure hardware high-speed real-time splicing control technology, all input signals can be freely displayed in the display wall window, fully supporting image cross-screen , Roaming, Picture-in-Picture, Overlay, Zoom and other high-end display functions. The controller is tailor-made for the display screen and is dedicated to the special plane, which can maximize the efficiency of the display unit. The LCD splicing curtain wall has clear images, flexible and diverse combinations, and rich display content, which can give users the greatest free design space and provide shocking display effects. LCD splicing walls are widely used in: video surveillance, telecommunications, public utilities, process processing, traffic control, security monitoring, and national defense, stage entertainment, television studios, stocks, large-scale exhibitions, shopping malls, banks, office halls, company welcome screens , Specialty stores, dispatch command, etc. The practicality of LCD splicing curtain wall The LCD splicing curtain wall has a large combination space: either small screen splicing or large screen splicing can be used; it can be one-to-one single-screen splicing, or a pair of M×N full-screen splicing; You can also mix and assemble large and small screens. According to the customer's system scale and application requirements for the LCD splicing curtain wall system, according to the use environment of the system, select appropriate products and splicing methods, design specific implementation plans, and meet the application requirements of the system.
According to the user's requirements for input signals, different video processing systems can be selected to realize VGA, composite video, S-VIDEO, YPBPR/YCBCR or DVI signal input to meet the needs of different use occasions and different signal input. Through the control software, various signals can be switched, spliced ​​into full-screen display, display in any combination, image stretched display, image roaming display, image superimposed display, etc. The LCD splicing curtain wall can create a personalized system according to the different needs of customers, and provide different implementation plans and technical support.
The difference between lcd splicing screen and led splicing screen1. High brightness and high contrast: DID LCD splicing screen has higher brightness, which is different from ordinary TV and PC LCD screens? The brightness of TV or PC LCD screen is generally only 250~300cd/m2, while the brightness of DID LCD screen can reach more than 700cd/m2. The DID LCD splicing screen has a contrast ratio of 1200:1, or even a contrast ratio of 10000:1, which is more than double that of traditional PC or TV LCD screens and three times that of general rear projections.
2. Thanks to the color calibration technology specially developed for DID products, through this technology, in addition to the color calibration of still images, the color of dynamic images can also be calibrated. Only in this way can the screen output be accurate and stable. In terms of color saturation, DIDLCD can achieve high color saturation of 80%-92%, while the current color saturation of ordinary CRT is only about 50%.
3. The brightness is uniform, and the image is stable without flickering. Since each dot of LCD keeps that color and brightness after receiving the signal, it does not need to constantly refresh the pixels like CRT. Therefore, the LCD has uniform brightness, high image quality and absolutely no flicker.
4. 120HZ double frequency refresh frequency, 120Hz double frequency liquid crystal display technology of DID products? Can effectively solve the smearing and blurring in the rapid motion of the image? Enhance the sharpness and contrast of the image? Make the picture clearer? It is not easy for the human eyes to get tired after watching for a long time.
5. The viewing angle is wider, use this technology? The viewing angle can reach double 180° (horizontal and vertical), and the application of PVA technology that is "image vertical adjustment technology" makes the LCD splicing screen have a wider viewing angle.
6. Pure flat display, LCD is the representative of flat-panel display devices, is it a true flat-panel display, no curvature at all and a large screen? No distortion or distortion.
7. Ultra-thin and narrow-edge design, the LCD splicing screen not only has the characteristics of a large display area, but also has the advantages of ultra-light and thin. It can be spliced ​​and installed easily. The special LCD screen for splicing, with its excellent narrow-edge design, makes the edge of a single chip even below 1 cm. Such a small edge effect will not affect the overall display effect of the entire display.
8. High service life, the service life of the backlight source of the DIDLCD LCD screen can reach more than 50,000-100,000 hours? This ensures the consistency of brightness, contrast and chromaticity of each LCD screen used in the spliced ​​display screen after long-term use? And to ensure that the service life of the display screen is not less than 50,000 hours.
9. Better reliability, ordinary LCD screens are designed for TVs and PC monitors and do not support continuous day and night use. Is the ID LCD screen designed for monitoring center and display center? Supports continuous use 7x24 hours.
The difference between LCD splicing screen and LED display: LED display characteristics
1. The brightness of the light is strong. When the sun shines directly on the screen surface within the visible distance, the display content is clearly visible
2. Automatic brightness adjustment has automatic brightness adjustment function, which can obtain the best playback effect in different brightness environments
3. Video, animation, charts, text, pictures and other information display, network display, remote control
4. Advanced digital video processing, technology distributed scanning, modular design/constant current static drive, automatic brightness adjustment
5. Super gray scale control has 1024-4096 gray scale control, the display color is above 16.7M, the color is clear and realistic, and the three-dimensional feeling is strong
6. Static scanning technology adopts static latch scanning mode, high-power drive, and fully guarantees the luminous brightness
7. Full use of imported large-scale integrated circuits, greatly improved reliability, easy to debug and maintain
8 Static scanning technology adopts static latch scanning method, high-power drive, fully guarantees the brightness of light
9. The image is clear, without jitter and ghosting, and eliminates distortion
10. Super bright pure color pixels
11. All-weather work is fully adapted to various harsh outdoor environments, waterproof, moisture-proof, anti-corrosion, lightning protection, strong overall seismic performance, good display performance, and high cost performance. The pixel tube can adopt P10mm, P16mm and other specifications.
The difference between LCD splicing screen and LED display: application
1. LCD splicing screens are widely used in financial and securities information display terminals; airports, ports, docks, subways, highways and other transportation industry information display terminals; commercial, media advertising, product displays and other display terminals; dispatch and control rooms Broadcasting and television, large-scale studios/performance venues; mining and energy safety monitoring systems; fire control, meteorology, maritime, flood control, traffic hub command systems; military, government, and urban emergency command systems; education training/multimedia video conference systems.
2. LED display screens are used in sports, advertising, factories and mining enterprises, transportation, stations, docks, airports, hotels, banks, securities markets, construction markets, taxation, shopping malls, hospitals, finance, industry and commerce, post and telecommunications, education systems, auction houses , Industrial enterprise management and other public places.
This is the end of the related introduction about LCD splicing. I hope this article will give you a more comprehensive understanding of LCD splicing.
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