【 Weak current College 】 comparison of various mosaic screen

Display technology development today, as schools of thought contend, possibilities, especially rear projection (DLP), plasma (PDP), liquid crystal (LCD) launched the continuousness offering a contrast select space. There is no doubt that the larger, thinner, more advanced technology development direction for splicing wall (wall), also from the traditional to the rear projection CRT, plasma, LCD development. Then, rear projection, plasma and LCD that a more technical superiority, better meet the needs of various applications place? we think the LCD will be able to better meet the application requirements, it is precisely this article will explain to you, we will list the rear projection, plasma and liquid crystal display of three technical principles and analysis to a few key indicators on their respective advantages and disadvantages, as well as excellent an LCD mosaic facade.

Rear-projection principum

Rear-projection of the realization principle is very simple, in the device's internal settings of a projector, issued zooming through the lens of images projected onto the back of the screen after is the rear projection. It was on the basis of that principle was born in rear-projection, as the use of different types of projectors can be divided into the main CRT (cathode ray tube) and LCD (liquid crystal), DLP (digital light processing), etc. CRT rear-projection belongs to the rear projection camp in the low-end product, and several other rear-projection you correspond to high end products, including DLP, the most excellent image sharpness, brightness, color, Visual perspective and volume, than the traditional CRT rear-projection has been greatly improved. The following described rear-projection DLP means.
Advantages: cheap low-end show programme.
Disadvantages: volume and weight is too large, long uninterrupted work, speed up the aging of the backlight.

Plasma principum

PDP is a use of gas discharge of display technology, it works much like the fluorescent lights. It uses a plasma tube as a light emitting element, each plasma tube corresponds to one pixel, screen with glass as a substrate, the distance between the substrate, forming one discharge space. Discharge space is filled into the neon, xenon, mixed with an inert gas as a working medium, in two pieces of glass substrate on the inner side coated with metal oxide electrodes made of conductive film incentive. When adding to the electrode voltage, discharge spaces mixed gas plasma discharge phenomenon occurs, also known as plasma effect. Plasma discharge produces ultraviolet UV excitation, coated with red-green-blue phosphor screens, screens emit visible light, showing images.
Advantages: colourful, high brightness, high contrast
Disadvantages: low power and heat, severe burns, picture quality decreases with time and each mosaic screen color difference between.

LCD principum

LCD is the use of liquid crystal in the voltage under the effect of the principle of the deflected. Due to the composition of the liquid crystal screen at the same point, you can display the red, green and blue primary color, or point of a liquid crystal is composed of three points together, they follow a certain order, through the voltage to stimulate these liquid crystal, can exhibit different colors, different proportions of collocation can show a variety of colors. The LCD itself is not illuminated, it relies on the backlight tubes to glow, and LCD backlight tubes of depends. Since the adoption of point Imaging's LCD, a screen which constitute the more dots, the finer the imaging effects, the number of points constitute crisscross the LCD TV's resolution, the higher the resolution, the better the effect.
Advantages: high resolution, the thickness of thin, light weight, low energy consumption, long life, no radiation.
The bad: slightly larger mosaicking.


Summary
1) from function: rear-projection technology for large volume and weight, the key technical indicators are far and plasma and LCD, and long hours of uninterrupted work, speed up the aging backlight, because only a few thousand hours of life, if you run 24 hours a day, a few months will need to change the backlight. Plasma as the power consumption and heat is very big, and there is serious burns and is not suitable for long time display static monitoring picture, and for concatenation, the total warming greater cause the device to easily burn. LCD in the flat panel display technology unique in the thickness of thin, light weight, low energy consumption, long life, no radiation, etc., as well as various key performance indicators of excellence that have made it into mainstream development prospect.

2) from price: consider the economics of the system, you cannot fail to mention the price, only in the high-performance, high-quality, economics has meaning. At present there is a plasma (PDP) mosaic walls, but its price is high, generally square up to hundreds of thousands of prices, and because of plasma burn-in problems, nor desirable in some display static images (security, road traffic, port, etc) to use, low overall price/performance ratio. And DLP TV wall although the price is relatively low, but one year replacement bulbs cost up to several thousand pieces, each screen, a curtain wall and a few tens of thousands to more than a hundred, a few years, its costs are amazing.

Liquid crystal mosaic wall, with its superior performance, reasonable prices at home and abroad have been widely welcomed. Its up to 5 million hours of service life, stable quality, low maintenance, it is wise to not select the second.