The video wall refers to the splicing of different numbers of screens into a large display screen to achieve the effect of image magnification display. In addition, it can also integrate multiple screens and display them on one screen at the same time to achieve multiple functions. Common application areas include outdoor large screens, monitoring command centers, conference rooms, etc. According to different functions, the video wall also includes a variety of display technologies.
So now, what types of video walls are there?
Four types of large-screen splicing technology: LED, LCD, DLP, PDP
The mainstream display products on the market include LED displays, LCD displays, etc., which represent the latest technology. Among them, the application of large-screen splicing technology is undoubtedly one of the hottest topics. The following four types of large-screen splicing technology are the most popular Representativeness, let’s make a simple comparison of their advantages and disadvantages for the convenience of friends to understand.
LED display
By controlling the display mode of semiconductor light-emitting diodes, the red, blue, white, and green LED lights are turned on and off to display text, pictures, animations, videos, and content.
LED splicing display is a kind of large screen, which is mainly spliced by LED unit boards. The distance between the lamp beads on each unit board is different, and its display effect is also different. Its main function is to be used as a large screen, like a square. Large screens and sky screens in shopping malls have the advantage of seamless stitching, but the disadvantage is the lack of resolution. There are more outdoor applications.
Focus: bigger, thinner and more stable
Advantages: long life, spherical display, strong and durable, suitable for outdoor applications
Disadvantages: The pixel points are sometimes obvious. The industry's finest LED point pitch is 1mm, which is not easy to miniaturize.
LCD video wall
The LCD liquid crystal display technology is adopted, and a back-illuminated screen is formed through the liquid crystal panel to form a full-HD, colorful screen. This display technology is characterized by clear pictures, high contrast, and mature technology, which is currently the mainstream A display technology, compared with our home LCD TVs, LCD video walls are industrialized on the panel based on this, so as to achieve the requirement of continuous startup, and its frame is only a few millimeters, so after splicing it together The impact of the image is very small. With control equipment such as a decoder or matrix, it can realize functions such as monitoring, decoding, display and signal switching. It is currently widely used in various monitoring centers and conference displays.
The liquid crystal itself does not emit light, it relies on the backlight tube to emit light, so the LCD screen depends on the backlight tube.
Focus: taller and thinner
Advantages: high resolution, thin thickness, light weight and long life
Disadvantages: There is a delay problem, and the splicing gap is obvious
DLP video wall
Digital light processing, that is to say, this technology needs to digitally process the image signal, and then project the light.
DLP is a rear projection device that uses a kind of reflective imaging technology on a screen. Its core equipment is an optical machine, which mainly includes two types of laser light sources and LED light sources. It is the main equipment used in monitoring and display in previous years. The seam is very small, basically negligible, the single screen size is large, ranging from 50 to 100 inches, the defect is high and the maintenance cost is high, the lights and the optical machine need to be replaced regularly, and the equipment is large in size, and the space requirements are relatively high. However, with the rise of LCD video walls, this market has been devoured more seriously. At present, it is only used in some large-scale occasions, such as public security traffic police command centers and data analysis centers.
Focus: bigger and higher
Advantages: seamless splicing, the largest display area, support for spherical display
Disadvantages: high maintenance costs in the later period, lamp life problems, must have a projection distance
Plasma PDP splicing
The ion display is a display device that uses gas discharge to emit light. This screen uses a plasma tube as a light-emitting element.
Focus: thinner
Advantages: high brightness, short response time
Disadvantages: limited by materials and processes, the screen size is small and the display quality is poor. In terms of the development trend of the entire industry, the development potential of plasma splicing is limited, and it will definitely be replaced in the future
Summary: The advantages and disadvantages of the above four types of large screens are different. Of course, it is not to say which screen is not good. They are suitable for use in their respective fields. Among them, LED display screens, as a key product in the field of large screens, have prospects in outdoor advertising, stage dance and other fields. broad.
