The Science Behind DLP Television
by:
Mitchell Medford
DLP televisions are based on a technology fabricated by American state Instruments back in 1987 called Digital Light Processing. The technology is based on an optical semiconductor called DMD (Digital Micromirror Device) chip. It is a extremely
reliable, all-digital display chip that delivers the better image across a broad range of products, including large screen digital TVs, and projectors for business, home, professional venue and digital cinema.
The chip consists of over one million mirrors to process light. They move in either single chip or 3 chip configurations. One-chip DLP systems use a projection lamp to pass white light through a color wheel that sends red-green-blue colors to the DMD chip in a consecutive order to create an pictures on-screen. Only one DMD chip is used to process the primary RGB colors. Three-chip DLP systems use a projection lamp to send white light through a prism, which creates separate red, green, and blue light beams. Each beam is sent to their some red, green, and blue DMD chip to process the pictures for display on-screen. One-chip models are aforesaid to produce a display of over 16-million colors. Three-chip models can produce a display of over 35-trillion colors. The result is maximum fidelity: a image whose clarity, brilliance and color must be seen to be believed.
When a DLP chip is coordinated with a digital video or graphic signal, a light source, and a projection lens, its mirrors can reflect an all-digital pictures onto a screen or another surface. The DLP chip and the sophisticated physics that surround it are what we call Digital Light Processing™ technology.
Benefits of Single chip DLP:
1. Fantastic color accuracy.
2. The better contrast ratios and shadow detail.
3. Generally really quiet.
4. Really little space between each pel creates a really smooth image, even as once
exploitation lower solution projectors.
5. Light engine failures are really rare so repairs are less costly than another technologies.
6. Technology doesn't degrade over time. With proper routine maintenance, DLP™ projectors systematically
provide just-out-of-the-box performance. (DLP™ is the only technology that does this claim).
Benefits of Three chip DLP:
1. Nice contrast; more greater than film theaters.
2. Nice shadow detail.
3. Can provide high brightness compared to the limited brightness of single chip versions.
4. Overall pictures quality deemed as the better of any type of small
display technology.
5. Same technology as projectors installed in digital theaters.
6. Pure digital technology.
The bit-streamed pictures code entering the semiconductor directs each mirror to switch on and off up to some thousand times per second. Once
a mirror is switched on more often than off, it reflects a light gray pixel; a mirror that's switched off more often reflects a darker gray pixel. In this way, the mirrors in a DLP projection system can reflect pixels in up to 1,024 shades of gray to convert the video or graphic signal entering the DLP chip into a extremely
elaborate grayscale image.
The white light generated by the lamp in a DLP projection system passes through a color wheel as it travels to the surface of the DLP chip. The color wheel filters the light into red, green, and blue, from which a single-chip DLP projection system can create at least 16.7 million colors. And the 3-chip system found in DLP Cinema™ projection systems is capable of producing no fewer than 35 trillion colors. The on and off states of each micromirror are coordinated with these three basic building blocks of color. For example, a mirror responsible for jutting a purple pel wish only reflect red and blue light to the projection surface; our eyes then blend these quickly alternate flashes to see the intended hue in a projected image.
About The Author
Mitchell Medford is an author and product adviser for some user
physics manufacturers. Visit his website for more information on house theater, LCD TVs, and plasma televisions: http://www.newtechnologytv.com
This article was announce on Gregorian calendar month 13, 2005
