As people's pursuit of visual enjoyment becomes higher and higher, various large-screen display technologies are developing rapidly. The relatively common large-screen splicing system is usually divided into three main types according to the working mode of the display unit, that is, LCD display unit splicing. , PDP display unit splicing and DLP rear projection display unit splicing. The following is a simple analysis of the differences between these large-screen display technologies for reference.
Plasma splicing system
PDP (Plasma Display Panel) is a plasma display. PDP is a display technology that uses gas discharge and works like a fluorescent lamp. It uses a plasma tube as a light-emitting element. Each plasma tube on the screen corresponds to a pixel. The screen uses glass as a substrate, and the substrates are separated by a certain distance to form a discharge space. The discharge space is filled with a mixed inert gas such as helium or neon as a working medium, and a metal oxide conductive film is coated on the inner surfaces of the two glass substrates as excitation electrodes. When a voltage is applied to the electrodes, a plasma discharge phenomenon occurs in the mixed gas in the discharge space, which is also called the plasma effect. Plasma discharge generates ultraviolet light, which excites a phosphor screen coated with red, green, and blue phosphors, and the phosphor screen emits visible light to display images.
PDP unit splicing has the advantages of bright colors, high contrast, and high brightness, but also has its insurmountable shortcomings. Due to the large amount of electricity and heat generated, the plasma may cause severe burns and is not suitable for long-term static display monitoring. After the PDP unit is used for splicing, the entire machine heats up higher, which makes the equipment easy to burn. In addition, the current market price of plasma splicing curtain wall is relatively high, generally the price of one square meter is as high as 100,000. Today, low-carbon and energy-saving have become the mainstream trend. For most ordinary users, plasma splicing is obviously not the best choice.
LCD splicing
The so-called LCD large-screen splicing is a splicing screen body, which realizes the large-screen display effect of the splicing control software system by splicing the LCD display unit. LCD splicing is currently represented by South Korea's Samsung DID. Although there are brands such as SHARP, LG, NEC in the splicing market, DID stands out in the LCD panel splicing technology with its excellent cost performance.
LCD splicing has the advantages of thin thickness, light weight, low energy consumption, long life, no radiation, etc. Its fine picture, high resolution, and excellent performance of various key performance indicators make it the mainstream of development and promising prospects. As a spliced display terminal, although LCD has the above advantages, as a spliced display unit, its shortcomings are also fatal: that is, its seam is currently large, and it is the largest among the three spliced display units, and many users suffer from pain.
DLP is the abbreviation of "Digital Lighting Progress". This means digital light processing, which means that the technology first digitally processes the image signal and then projects light. In particular, DLP projection technology uses digital micromirror wafers (DMD) as the main key component to realize digital optical processing. The principle is that the light source is homogenized by the integrator, the light is divided into three colors of R, G and B through the color wheel with three primary colors, and the colors are imaged by the lens. On the DMD. In the synchronization signal method, the digital signal of the digital rotating lens converts continuous light into grayscale, and the colors are represented by three colors of R, G and B, and finally projected through the lens.
The DLP large-screen splicing system is based on a DLP projector, and is equipped with a high-brightness, high-resolution color vivid video wall composed of an image processor. It can display various computer, network signals and video signals. The screen can roam freely and open windows. , Zoom in and zoom out, and overlay. In addition, compared with other splicing technologies, the outstanding advantage of DLP splicing is "zero gap", and the overall display effect of physical gap images is good. In addition, the DLP splicing system has lower environmental requirements, thereby reducing operating costs.
For the light source bottleneck of DLP rear projection, the recently launched LED light source has become a good breakthrough, and it has strong strength for the application of DLP splicing. Based on the maturity of technology and the advantages of market share, industry experts believe that the future development of DLP splicing is still a bright road.
