Projector market new technology to stimulate the prosperity and development of projection - projector technology - Education Industry

Focus today : Campus TV boost the development of secondary school education Beijing 50 Is well known, Projector Is extremely rapid in recent years the development of high-tech products. With the acceleration of education information, types of schools are increasing educational funding, the projector has already become an indispensable tool for teaching, education, and even saturated the market trend; At the same time, a variety of business presentation and extensive efforts, the entry-level products of economic projection is sprung; home projector market has already entered a formal expansion, coupled with stimulation of the Olympic Games, engineering products, popular projector speed exceeded people's expectations, which are makes the projector further increase the market potential.

We may note that the current projection products than the former, has been more targeted to meet the needs of various populations of different applications; more importantly, most companies are speeding up Technology Updating, strengthening innovation, highlighting their advantages, as far as possible to avoid the homogenization, which will also facilitate more effective projection market prosperity and development.

This article is to introduce and talk about this two years in the projector on some new technologies, including the core projection display technology products, brightness and color control technology, personal use of technology and security technologies. Can also be so to speak, the author describes the main consumers for the rookie class, if you projector development trend of recent years do not understand, after reading this, your purchase should be helpful sorter.

Core projector display technology Present, the projector market, the core display technologies including LCD, DLP, Laser, LCOS (SXRD Sony ) And the GLV so. LCD projectors usually talking about is actually transmissive LCD, which is liquid crystal plate LCD. It contains three separate LCD LCD panel. Signal source to the image through analog-digital conversion and processing, are broken down into the red, green, blue (R, G, B) gray-scale images, respectively, is loaded into three monochrome LCD panel. Use light bulbs Light source , Form a beam of light through the beamsplitter, then the three beams of light in the prism in convergent synthesis, by projection lens to enlarge the screen can produce full color images.

DLP display technology is used is the Digital Micromirror Device DMD, DMD chip is a complex optical switching device, its surface is usually up to 50-100 million hinge installation composed of rectangular micro-mirror array, a mirror corresponds to a pixel, digital light processing technology using modulated video signals. The colors commonly used include red, green, blue, transparent color filter by the folder with the color wheel to complete. Color wheel located between the light and DMD chip, so that the light was red, green, and blue alternately, and then take the initiative to adjust the light to produce an image projected onto the screen.

Present, most DLP projectors are single DMD chip, which 3DMD chip DLP projectors due to high costs, penetration is very low, only used on high-end digital cinema.

Concentrate on new LCOS technology, in essence, LCOS is a new type of reflective LCD projection technology, also known as liquid crystal light valve LCD, are reflective LCD, and the usual transmission-type liquid crystal display significant differences .

It uses CRT tube and liquid crystal light valve imaging device, as is the CRT projector, LCD, optical product of the combination valve. First, the optical signal output from the CRT exposure to fiber media converter on the constantly changing light signal is converted to electrical signals; external light source produces a bunch of light, projected onto the light valve, followed by the polarized light filter to filter valve to the other direction of light, only allows the same direction with the optical gap of light through, and with the CRT signal phase compound, and then projected onto the screen.

Compared with traditional LCD, LCOS can achieve higher brightness, reflection LCD panels can even be total internal reflection, and open the whole can achieve zero reflection off, so that contrast is also higher. Therefore, it is generally more liquid crystal used in engineering Projection display Suitable for large-scale public demonstration sites.

Laser laser display technology is by displaying the laser projection device directly to a screen or wall, there is no problem of an aging LCD's LCD panel, it will not appear DLP's color wheel problem, but can be as independent as a small matchbox can be built into mobile phones, PDA, game consoles and even vehicle equipment which, in the future has broad application prospects.

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