DLP projection technology, PDP plasma technology, LCD LCD splicing technology difference

The development of LCD splicing products has made rapid progress in recent years, among which LCD splicing technology can be said to be an indispensable factor. Nowadays, the three major splicing technologies that occupy the major positions are DLP projection technology, PDP plasma technology, and LCD splicing technology. Now, Ai Didi will give you a detailed analysis of the advantages and disadvantages of the three splicing technologies.

DLP is the abbreviation of “Digital Light Procession”. It is a digital light processing DLP large-screen splicing system. It is mainly composed of a DLP projector and an image processor. The high-brightness, high resolution, vivid color TV wall can display various kinds of computers. Workstations, network signals and various video signal screens can roam freely, open windows, zoom in and out, and superimpose. The main feature of DLP splicing wall spliced ​​by multiple rear projection display units is that the main dimensions of the screen are currently 50 inches, 60 inches, and 67 inches in the market. As the user's demand for large screen sizes increases, 80 The inches, 84 inches, 100 inches, and 120 inches are also gradually used. The resolution of the DLP Video Wall is superimposed by the resolution of each display unit. Such as the single 1024 * 768 3 * 2 mosaic wall mosaic wall resolution up to 1024 * 3768 * 2. In addition to the large size, the other major feature of the DLP large-screen video wall is the small seam. Although there are screen seams between the display units, the current physical joint between the unit cells has been controlled within 0.5 mm. However, DLP rear-projection splicing system still has some fatal defects. DLP display uses multiple display units to achieve a certain number of splicing. Color and brightness will be uneven, and its large power consumption, the internal light bulb in the continuous work 6000-8000 After hours, there will be a decrease in brightness. In order to maintain a good display effect, the lamp bulb needs to be replaced at the later stage of the project application, so the maintenance cost is very large. In addition, due to the large thickness of the DLP splicing unit, a sufficient space is left on the back, which is also a problem in some relatively small environments. The advantages of DLP splicing are large size, small stitching, digital display, low brightness attenuation, slow pixel gaps, small images, fineness, long time display, computer and static images, DLP splicing, shortcomings, lower brightness, lower number of splicing, higher brightness, and uneven brightness. Large power consumption in the later period of high maintenance costs.

PDP plasma splicing splicing PDP (Plasma Display Panel The plasma display panel Taiwan called plasma display) is a display technique using a gas discharge lamp and its working principle is similar. From the technical principle, since the plasma tubes emitting light in the PDP screen are evenly distributed in the plane, the center and the edge of the displayed image are completely consistent without any distortion, and a true pure plane is achieved. Since there is no electron beam motion in the display process, there is no need to rely on electromagnetic fields, so the external electromagnetic field will not interfere with it. It has good environmental adaptability. This is also the reason why the US military has long used it for military equipment.

Since the PDP emits light without a background light source, there is no problem of viewing angle and brightness uniformity of the LCD display and high brightness and contrast are achieved. The design of the three primary colors sharing the same plasma tube also avoids the problems of focusing and focusing to achieve very clear images. The larger the screen of the PDP than the LCD display technology, the higher the depth of field and fidelity of the image. In addition to the advantages of brightness, contrast, and viewing angle, the PDP technology also avoids the response time problem in LCD technology, which is a crucial factor in dynamic video display. Therefore, from the current state of the art, the advantages of PDP display technology in the field of dynamic video display are even more obvious. It is more suitable for use as a TV or home theater display terminal, especially for large-screen displays, and is more suitable for HDTVs to be launched soon. No scanning line scan of PDP display is entirely for pixels to display pixels. Therefore, clear and stable images without flicker will not cause eyestrain. The PDP also has no X-ray radiation. Because of these two characteristics, the PDP is truly a green display product. Plasma display body ultra-thin, small footprint, suitable for wall hanging, suitable for installation in any area, even if your space is very small installation of plasma display is also entirely possible on the installation space than the DLP to save much. However, plasma screen products have large gaps in pixel reliability, lower power consumption relative to other products, and higher lifespan. Congenitally, the brightness of the screen will be halved after 5000 to 10000 hours, and it will be difficult to work normally at an altitude of 2,500 meters or more. The weak point is that it is easy to burn when the computer image or the static image is displayed for a long time. The so-called burning phenomenon means that the plasma inside the screen is changed when the plasma TV is in the image static state for a long time, resulting in failure to work normally. Intuitively, it will appear at a specific position on the screen. The residual image of the image and the replacement of any film source cannot remove the PDP splicing. Disadvantages: Large gaps between pixels Display of computer images or static images is easy to burn Brightness decay is fast and can not improve reliability. Low consumption electrode High LCD splicing LCD splicing LCD liquid crystal display is the abbreviation of Liquid Crystal Display. The structure of the LCD is to place a liquid crystal in two parallel glasses. Two glass sheets have many vertical and horizontal small wires in between. By energizing or not, the rod crystal molecules can be changed in direction. Light refracts to produce a picture. The LCD consists of two glass plates about 1 mm thick separated by a uniform spacing of 5 μm containing the liquid crystal material. Because the liquid crystal material itself does not emit light, there is a light tube as a light source on both sides of the display screen, and a back light plate or a uniform light plate and a reflective film is formed on the back of the liquid crystal display. The backlight board is composed of fluorescent substances and can emit light. Mainly to provide a uniform background light source. The light emitted by the backlight enters the liquid crystal layer containing tens of thousands of liquid crystal droplets after passing through the first polarization filter layer. Liquid droplets in the liquid crystal layer are all contained in a fine cell structure. One or more cells constitute one pixel on the screen. An electrode electrode that is transparent between the glass plate and the liquid crystal material is divided into rows and columns. The optical state of the liquid crystal is changed by changing the voltage at the intersection of the rows and the columns. The liquid crystal material functions like a small light valve. Around the liquid crystal material are the control circuit portion and the driver circuit portion. When the electrodes in the LCD generate electric fields, the liquid crystal molecules are distorted so that the light passing through them undergoes regular refraction and then passes through the second filter layer and is displayed on the screen. LCD splicing LCD splicing is a new splicing technology that has emerged in recent years after DLP splicing and PDP splicing. LCD splicing wall has low power consumption, light weight, and long service life. It can work normally for 50,000 hours without radiation and screen brightness. Uniformity and other advantages, but its biggest drawback is that it can not be seamlessly stitched. It's a bit of a pity for industry users who require very fine display screens. As the LCD screen will have a border LCD splicing it will appear border (sew), such as a single 21-inch LCD screen frame generally 6-10mm two LCD screens to connect the seam there is 12-20mm. In order to reduce the gap of LCD splicing, there are several methods in the industry. One is the narrow seam splicing and the other is the micro-slit splicing micro-slit splicing that the manufacturer will buy back the outer shell of the LCD screen to remove the splicing between the glass and the glass. The risk of such practices is greater If the LCD screen is not properly removed, it will damage the quality of the entire LCD screen. At present, there are very few manufacturers in China using this method. In addition, after 2005 Samsung introduced a special LCD screen for splicing - DID LCD screen DID LCD screen is designed specifically for splicing in the factory to do its border is very small. At present, the most common LCD LCD wall sizes are 19-inch, 20-inch, 40-inch, and 46-inch. It can be arbitrarily stitched to a maximum of 10X10 according to the customer's needs. The backlight uses a backlight with a lifetime of 50,000 hours. Secondly, the small physical distance between LCDs can easily meet the high-definition standard. In addition, the power consumption of LCD screens with low calorific value and low 40-inch LCD screens is about 150W, which is only about 1/4 of the plasma, and stable operation and low maintenance cost. Currently more suitable for LCD splicing products are Samsung DID LCD screen, NEC ultra-narrow LCD screen, Vewell ultra-narrow LCD screen are all belong to LCD splicing products, but Vewell ultra-narrow LCD screen has a very high cost performance is very suitable for monitoring Large screen splicing project LCD LCD splicing screen Advantages Low power consumption, light weight, long service life Normally work more than 50,000 hours No radiation, uniform screen brightness Late maintenance cost Less LCD splicing Cons Spelling

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