Its essence District 5 large projection of its dregs inventory of technical advantages - projection technology, DLP-education industry

Its essence District 5 large projection of its dregs inventory of technical advantages - projection technology, DLP-education industry

With the requirements of technological development and display, large screen application system in all walks of life more and more, for large-screen systems, display Technology There are the following:

CRT display technology. Using cathode ray tube (CRT) technology in big screen Projection display Screen, the technology is the first large-screen projectors using the technology. CRT projection display technology, display brightness light-emitting core and completed by the CRT, because CRT projection technology, brightness and resolution of conflicts, limiting their opportunities to continue to develop. And CRT projection technology to the three projection guns were used (R, G, B) are shown and then brought together, making projection installation is very difficult, CRT projection technology is now largely LCD, DLP and LCOS technologies such as the new alternative.

LCD display technology. This technology is from 90's, Japanese companies led by the projection technology, its technology more and more mature and maturing, the static from the silicon crystal to today's dynamic polysilicon liquid crystal, the technology has come a long way development, the key for desktop projectors, business projectors, and a small number of large-screen projector tiled display wall applications.

DLP pure Digital Display technology. DLP (Digital Light Processing) projection and display information in respect of a revolutionary technology, according to the U.S. TexasInstruments (TI) developed without pieces of digital micromirror (DMD) design is made, creating the final show of digital video information part of it by launching optical imaging theory, to achieve full digital image processing, with stable, reliable, easy maintenance, high brightness, display images smooth, delicate and exact, DLP projection technology is widely used in desktop projectors Business Projector , Movie theaters, especially in the field of large-screen projection display wall, it has been dealing with leadership.

LCOS display technology. LCD technology is based on the past few years in the development of a new display technology, LCOS biggest advantage is that resolution can be high, in the portable information device applications, this advantage outstanding. Drawback is that the process is more complicated modules, control all stages of production yield is not easy, cost is difficult to be competitive. Can only remain in the high resolution required for specific purposes, such as LCD projectors.

GLV display. GLV technology, principles and Texas Instruments (TI) Digital Micromirror Device Development (DMD) chip is somewhat similar, is also the principle of MEMS (Micro-ElectromechanicalSystem; MEM)-based, relying on light reflection to determine the image appeared or not; The GLV light reflecting element is reflected by a striped surface formed according to the voltage provided on the substrate, for a very small range of vertical movement, decided to light reflection and deflection, plus the reflection device high switching speed, to achieve the image regeneration. This technology is still in development stage and there were no industry.

1, CRT display technology

Seventies, due to video cinema application requirements, projection display technology also will start to emerge and get a rapid development, in 1974, CRT (CathodeRayTube) projector began to appear on the market, the early projection CRT machine is mainly used in video and other video signals show. With the projector expanding application fields, it has developed to the telecommunications, transportation, banking, military, education Calvary industry, application area monitoring system, public information release, 3D simulations show that the meeting system. CRT Display Technology for the projector, it will input signal source decomposition into R (red), G (green) B (blue) three CRT tube screen, the phosphors light system under high pressure amplification, gathered in large screen color image. Optical system and projection CRT tubes, pipes, commonly referred to as three shots at the projector is composed of three CRT projectors, as used in Light source , Also called active projection method. CRT technology is mature, show colorful images, restore good, with rich geometric distortion adjustment capability; but its important technical indicators between image resolution and brightness constraints directly affect the brightness value of CRT projector, so far, its brightness value has remained at 300lm less. Another CRT projector complex operation, especially complicated convergence adjustment, a large body size, and expensive, only suitable for installation on the ambient light is weak, relatively fixed place, not moving, has been basically out of the market.

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