The Science Behind DLP Television
By: Mitchell Medford
DLP televisions are based on a technology invented by Texas 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 highly reliable, all-digital display chip that delivers the best picture 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 come 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 sequential order to create an image 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 respective red, green, and blue DMD chip to process the image for display on-screen. One-chip models are said 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 picture 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 image onto a screen or other surface. The DLP chip and the sophisticated electronics that surround it are what we call Digital Light Processing™ technology.
Benefits of Single chip DLP:
1. Fantastic color accuracy.
2. The best contrast ratios and shadow detail.
3. Generally very quiet.
4. Very little space between each pixel creates a very smooth image, even when using lower resolution projectors.
5. Light engine failures are very rare so repairs are less costly than other technologies.
6. Technology doesn't degrade over time. With proper routine maintenance, DLP™ projectors consistently provide just-out-of-the-box performance. (DLP™ is the only technology that makes this claim).
Benefits of Three chip DLP:
1. Good contrast; much greater than film theaters.
2. Good shadow detail.
3. Can provide high brightness compared to the limited brightness of single chip versions.
4. Overall image quality deemed as the best of any type of micro display technology.
5. Same technology as projectors installed in digital theaters.
6. Pure digital technology.
The bit-streamed image code entering the semiconductor directs each mirror to switch on and off up to several thousand times per second. When a mirror is switched on more frequently than off, it reflects a light gray pixel; a mirror that's switched off more frequently 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 highly detailed 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 projecting a purple pixel will only reflect red and blue light to the projection surface; our eyes then blend these rapidly alternating flashes to see the intended hue in a projected image.
The Real Jesus: Who is the Real Jesus? Ever since the dawn of modern rationalism, skeptics have sought to use textual criticism, archaeology and historical reconstructions to uncover the "historical Jesus" -- a wise teacher who said many wonderful things, but fulfilled no prophecies, performed no miracles and certainly did not rise from the dead in triumph over sin. Over the past 100 years, however, startling discoveries in biblical archaeology and scholarship have all but vanquished the faulty assumptions of these doubting modernists. Regretably, these discoveries have often been ignored by the skeptics as well as by the popular media. As a result, the liberal view still holds sway in universities and impacts the culture and even much of the church.
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This presentation explodes the myths of these critics and the movies, books and television programs that have popularized their views.
Presented in ten parts -- perfect for individual, family and classroom study -- viewers will be challenged to go deeper in their knowledge of Christ in order to be able to defend their faith and present the truth to a skeptical modern world – that the Jesus of the Gospels is the Jesus of history -- "the same yesterday, today and forever" (Hebrews 13:8). He is the real Jesus. Speakers include: George Grant, Ted Baehr, Stephen Mansfield, Raymond Ortlund, Phil Kayser, David Lutzweiler, Jay Grimstead, J.P. Holding, and Eric Holmberg. Ten parts, over two hours of instruction! Running Time: 130 minutes
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| The Beast of Revelation: IDENTIFIED
Who is the dreaded beast of Revelation? Now at last, a plausible candidate for this personification of evil incarnate has been identified (or re-identified). Ken Gentry's insightful analysis of scripture and history is likely to revolutionize your understanding of the book of Revelation -- and even more importantly -- amplify and energize your entire Christian worldview! Historical footage and other graphics are used to illustrate the lecture Dr. Gentry presented at the 1999 Ligonier Conference in Orlando, Florida. It is followed by a one-hour question and answer session addressing the key concerns and objections typically raised in response to his position. This presentation also features an introduction that touches on not only the confusion and controversy surrounding this issue -- but just why it may well be one of the most significant issues facing the Church today. Ideal for group meetings, personal Bible study -- for anyone who wants to understand the historical context of John's famous letter "... to the seven churches which are in Asia." (Revelation 1:4) |
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INCLUDES A FREE Sixteen Christian leaders and scholars answer some of the most common questions and misperceptions related to this volatile issue: Download the free |
Perfect for group instruction as well as personal
Bible study. Speakers include: George Grant, Howard Phillips,
R.C. Sproul Jr., Ken Gentry, Gary DeMar, Jay Grimstead, R.J. Rushdoony,
Steven Schlissel, Andrew Sandlin, Eric Holmberg, and more!
Ten parts, over four hours of instruction! Watch over 60 streaming videos from God's Law and Society at:
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| Amazing Grace: The History and Theology of Calvinism
Over four hours of instruction! Just what is “Calvinism?” Does this teaching make man a deterministic robot and God the author of sin? What about free will? If the church accepts Calvinism, won’t evangelism be stifled, perhaps even extinguished? How can we balance God’s sovereignty and man’s responsibility? What are the differences between historic Calvinism and hyper-Calvinism? Why did men like Augustine, Luther, Calvin, Spurgeon, Whitefield, Edwards and a host of renowned Protestant evangelists embrace the teaching of predestination and election and deny free will theology? This is the first video documentary that answers these and other related questions. Hosted by Eric Holmberg, this fascinating three-part, four-hour presentation is detailed enough so as to not gloss over the controversy. At the same time, it is broken up into ten “Sunday-school-sized” sections to make the rich content manageable and accessible for the average viewer. |
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