Digital light processing


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Digital Light processing

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Digital light processing

  1. 1. DLP - Digital Light Processing Based on,  High-Brightness  High-Resolution Applications
  2. 2. What is DLP Technology ? • Digital Light Processing (DLP) is a display technology developed by Texas Instruments. • It provides all-digital projection displays that offer superior picture quality in terms of resolution, brightness, contrast. • This provides an overview of the digital video processing solutions like scan conversion, picture enhancements, color processing. • DLP™ technology is in use wherever visual excellence is in demand.
  3. 3. Background Information • DLP was invented in 1987 by Dr. Hornbeck of Texas Instruments Inc.  In 1992, TI started a project to explore the DMD's commercial viability.  A year later, it named the new technology DLP and formed a separate group to develop commercial display applications.  In 1994, TI demonstrated DLP projectors for the first time.  In 1997, the Academy of Motion Picture Arts and Sciences chose DLP to project film at the Oscars, where the first three-chip DLP technology was demonstrated to the Hollywood community.
  4. 4.  In 1999, DLP Cinema was first demonstrated to the public with the release of Star Wars Episode I: the Phantom Menace. By December 2002, TI had shipped 2 million DLP subsystems.  DLP Products has also received two Emmy Awards, for excellence in 1998 and for technology and engineering in 2003.  In 2002, Hornbeck was elected a fellow of the International Society for Optical Engineering and received the David Sarnoff Medal from the Society of Motion Picture and Television Engineers.
  5. 5. • Cathode Ray Tube (CRT) • Liquid Crystal Display (LCD) • Plasma
  6. 6. Enter Digital Light Processing • pixels on a DLP chip is a reflective mirror • amplifies the light generated from the chip. • The advantage of DLP It produces bright, high-contrast images It can be projected onto any size screen
  7. 7. Important Basic Concepts of DLP • DMD • Color Wheel
  8. 8. Semiconductor That Changed Everything  Heart of DLP  Invented by Larry Hornbeck of Texas Instrument  world's most sophisticated light switch  Rectangular array of up to 1.3 million of hinge-mounted movable microscopic mirrors  Size of a fifth of human hair  Each mirror correspond to one pixel of image  Mounted over a CMOS SRAM
  9. 9. • • • •    Not operating – parked at 0 degree On – Tilt +10 degrees Off – Tilt –10 degrees On/Off Switching – 1000 times/sec Consists of 508,800 tiny, tiltable mirrors The tilt directs light toward the screen, or into a "light trap" that eliminates unwanted light when reproducing blacks and shadows. A glass window seals and protects the mirrors.
  10. 10. DLP: Adding Colors • The white light passes through a color wheel • The color wheel filters the light into red, green, and blue. • a single-chip DLP projection system can create at least 16.7 million colors. • 3-DMD chip system is capable of producing no fewer than 35 trillion colors.
  11. 11. How DLP works ? • Signal Conversion • Gray Scale Image • Color Creation
  12. 12. Step 1 – • Accepts both analog or digital signal • All signals must be converted into digital • The digital signal, enables mirrors to tilt towards “On” or away from “Off” light source.
  13. 13. Step 2 –  On” – light Pixel vs. “Off” – Dark Pixel  Mirror switched on more frequently than off – Reflects Light Gray Pixel  Rapid Switching allows up to 1024 shades of gray reflections  Digitalized video signal entering DMD get converted into highly detailed grayscale image Not present
  14. 14. Step 3 – • Color is added as white light from the lamp passes through a color wheel filter • Color Wheel – RED, GREEN & BLUE • mirrors on DMD are tilted on for the exact amount of time required for each basic color • Only 1 color is shined onto DMD at a time • When spinning fast enough, human eyes blend alternating flashes to view “more” colors in the projected image. Color wheel present
  15. 15. DLP Technology allows for a clear smooth picture with no glare due to its embossed coating technology: • DLP Technology allows for a clear smooth picture with no glare due to its embossed coating technology: Anti Glare Coating Screen Normal Screen
  16. 16. Current Projection TV or Monitor Technology A 43" DLP™ TV is 35% slimmer and 56% lighter than a 36" direct view TV. • Every pixel on a DLP chip is a reflective mirror, which amplifies the light generated from the chip. • There is no limit to the size of the screen that can be manufactured. • Brightness and contrast is even across the entire surface of the screen.
  17. 17. ARCHITECTURE DESIGN Only inorganic Mirrors are aluminium Off chip drivers Arrayed on center->high fill factor Electrostatic torque +ve & -ve Potential of yoke Thick oxide Brightness, contrast ratio
  18. 18. EXAMPLES Video processing systems        SVP2 Performing 5.7 billion 8-bit additions/sec. Data Path ASIC 48-bit Data Input Register(DIR) 32-bit DOR Independent Clock Control Room Projectors, home theater, CRT, institutional projectors.
  19. 19. 1-chip DLP Projection System  16.7 millions of colors  TV, projector, home theater system
  20. 20. 3-chip DLP Projection System     35 trillion of colors 3 DMD configuration Each DMD dedicated to 1 color only White light passes through a prism to divide red, green and blue and later recombine to form image
  21. 21. RESEARCH AND DEVELOPMENT CONVERGENCE OF TECHNOLOGY • • Rotation of the mirror memory cell in the on (1) state, the mirror rotates to +10 degrees.  off (0) state, the mirror rotates to -10 degrees  (1) state of the mirror appears bright  (0) state of the mirror appears dark.
  22. 22. INDUSTRY RELEVANCE • used in large projection screen applications • Mission To Mars, Toy Story 2, Rocky and Bullwinkle, Disney's Dinosaur, and Spy Kids. • several manufacturers, such as Hitachi, Panasonic, Samsung, and Mitsubishi are producing rear-projection DLP sets for the consumer.
  23. 23. • organic compounds in LCD panels susceptible to high heat and light energy stress. • DLP technology does not use organic compounds • LCD technology has a failure mode that does not exist with DLP.
  24. 24. FUTURE OF TECHNOLOGY • HD2+ for contrast ratios greater than 3000:1 for much improved color. • eliminating more of the latent brightness when in the “off” position . • Sequential Color Recapture (SCR) “Spiral of Archimedes”