LCOS projection technology compared with LCD projection technology - overhead projectors, office equipment - office supplies industry

Projection technology today has become increasingly mature

. According to the different projection core technology can be divided into CRT (cathode ray tube) projectors, LCD (liquid crystal) projector, LCOS (liquid crystals) projection, and DLP (digital light processor) projection of four main types. Which, CRT and LCD projection technology by transmission type projection method, while the DLP and LCOS projection technology uses reflective projection means. The current mainstream market Projector Is a DLP projection technology using LCD and projector. Projector market in the late 20th century occupies the main position of the CRT (cathode ray tube) projector technology, almost all of the early projector using this projection. But now it is already being LCD, DLP, LCOS projectors and other new technology instead. LCD projection technology is the light through the optical system formed by spectroscopic red, green and blue beams of light were transmitted through the red, green and blue liquid crystal panel and after analog / digital signal conversion, by controlling the liquid crystal panel LCD unit opening and closing to control light off road, red, green and blue color light in the prism of the last cluster, projected by the projection lens to form color images on the screen. DLP projection system a bit complicated, the core is the digital micromirror device DMD chip. Its principle is by controlling the micro-lens is tilted to the light of different angles, to control the light reflected to the lens, thus creating an image. DMD DLP chip, according to the number used is divided into two single-chip and three chips. General single-chip DLP projector is, that there is only one DMD imaging components; three-chip DLP projection technology can achieve very high or very high image quality, brightness, but the cost is high, so now most of the DLP projector market machine is a single chip. LCOS is a new type of reflective LCD projection technology, which uses liquid crystal coated silicon CMOS integrated circuit chip as a reflective LCD substrates, polished with advanced technology as a post-plated aluminum mirror, the formation of CMOS substrate, then the CMOS substrate and contains a transparent electrode on glass substrate with lamination, then into the liquid crystal packages. Mainly by the halogen light source, xenon lights, LED light, set light to the panel, the panel of the image projected by the reflection or transmission image, and then after splitting, combined optical system, and finally the image projected onto the screen imaging. [LCOS projection technology compared with LCD projection technology] Exquisite high-resolution images LCOS chip has a higher aperture ratio and a more fine pixel pitch. This makes the screen LCOS smaller the distance between pixels, the picture looks more distinctive uniform. LCD projection technology has obvious grid phenomenon. This projection screen features large in the projection is particularly evident when. Optical efficiency LCOS chip, high aperture ratio will in itself enhance the efficiency of the optical projector. High aperture ratio means more chip area involved in light reflection. Also, because the special structure of LCD projection liquid crystal optical chip demand, further weakening the LCD's optical efficiency. Therefore, the same bulb with LCOS and LCD projectors in the effect of higher brightness than can be achieved. This is not only to improve the picture quality, but also can save more energy. Outstanding black By transmission technology, LCD projection technology projection, display color, whether or not requirements are beyond the control of liquid crystal chip zero transmittance. This makes the perfect presentation of LCD projection technology can not be a black screen effect. However, LCOS projection technology was able to significantly restore the projector to improve the performance of the black. Excellent black and gray effect to LCOS projector brings more rich and delicate grayscale expression. Make more real image details, natural, with three-dimensional. For showing motion pictures LCOS projection technology in motion picture display has some advantages. As a result of special reflective optics, thinner liquid crystal layer can be done, it can reduce the viscosity of liquid crystal molecules role in making sports screen respond more quickly, clearly, to develop a more fluid picture. That is why single-chip DLP LCOS can use a similar image as one of the reasons the timing. Integrated in terms of LCOS high resolution, color, gray scale excellent, deep black, bright screen, grid is much less and more energy-saving features. By contrast LCD projection screen grid, black impure and utilization of the bulb is less obvious expenses. [LCOS projection technology and DLP projection technology more] And today most of LCOS projector on the market are compared with three-chip structure, DLP projector camp slightly complicated products.

LCOS projection technology compared with LCD projection technology - overhead projectors, office equipment - office supplies industry

By: coquettish

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