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Digital Light Processing and it's Future applications

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This ppt describes briefly about DLP, its evolution and working. It also includes the Pros & Cons of this technology.
You can also find an youtube video regarding the working of digital light processing.

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Digital Light Processing and it's Future applications

  2. 2. OUTLINE:  Introduction  History of Evolution  Basic components of DLP  How DLP works?  Pixel structure of Digital Micro-mirror Device (DMD)cell  Advantages & Disadvantages  Applications  Conclusion  Future roadmap  References
  3. 3. Introduction: Digital Light Processing (DLP) is a display technology developed by Texas Instruments. It is based on an optical semiconductor, called a Digital Micro- mirror Device (DMD), which uses mirrors made of aluminium to reflect light to make the picture. DMD can be combined with image processing, memory , a light source and optics to form a DLP system capable of projecting images with better colour fidelity and consistency than current technology. It provides all-digital projection displays that offer superior picture quality in terms of resolution, brightness, contrast.
  4. 4. History of innovation: DMD was invented in 1987 by Dr. Larry Hornbeck of Texas Instruments. In 1993, 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. Since 2000, several DLP technology based products such as projectors, HDTV’s, “Instant theatre”, etc were introduced .
  5. 5. Why DLP? • The traditional CRT projectors have RGB tubes which makes the entire cabinet bulky. • The LCD projectors use LCD light gates for projecting, which introduces pixelation effect. • In order to overcome all the drawbacks of previous techniques, DLP was developed.
  6. 6. Components required for DLP: Light source Colour wheel DMD Memory Projection lens & screen
  7. 7. How DLP works? It digitally manipulates light to produce film-like, all-digital images. DLP integrates a projection lamp and an electronic video signal from a source and the processed light produces an all-digital picture.
  8. 8. DLP projector internal structure: DLP accepts analog or digital signals, which is converted into an entire picture frame video signal through processing.
  9. 9. Isometric schematic of DMD cell: DMD comprises of over one million mirrors, where each mirror represents a pixel. These mirrors reflects light in either of two directions depending on the state of underlying memory cell.
  10. 10. Pixel structure of DMD cell: The mirror is rigidly connected to an underlying yoke, which is in turn connected to the hinges to support posts that attaches the substrate. This DMD mirror is electronically driven.
  11. 11. Chip models of DLP: Single chip model Three chip model One chip DLP systems use a projection lamp to pass white light through a colour wheel that sends red-green-blue colours to the DMD chip in a sequential order to create an image on- screen. In 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 send to their respective red, green and blue DMD chip to process the image for display on-screen.
  12. 12. Advantages: Brighter -Because it brings more light from lamp to screen. Sharper -As it can produce the closest mirror image of an incoming video of any resolution . Versatile -DLP projectors are small and light weight. Reliable -it is capable of recreating the source material .
  13. 13. Disadvantages:  The only real disadvantage of DLP projectors is "rainbow effect." •The Rainbow Effect often referred to as RBE, is a affect that has some people seeing flashes of red, green and blue. This is caused by the eye/brain dealing with the effects of projectors using high speed, spinning colour filter wheels. •Since a colour wheel is needed for this to occur, the only types of projectors affected are DLP projectors, since they are single chip devices, and require a colour wheel to add colour.
  14. 14. LCD Vs DLP Projector: DLP Vs LCD LCD DLP LCD projector tends to produce more saturated colors and sharper images. LCD Projectors operate by shining light through transparent LCD cells. DLP Projectors typically offer deeper blacks and higher contrast. DLP projectors operate by reflecting light through mirrors placed in the form of a matrix over a DMD device.
  15. 15. Applications: DLP Televisions Digital Light Processing Television is a technology that uses one, or sometimes three, electronic chips called Digital Micro-mirror Devices, or DMDs, to produce a vivid picture with a high contrast ratio on a high- definition large-screen TV.
  16. 16. Conclusion: As compact disc revolutionized the audio industry, DLP will revolutionize the video projection. Based on the reflected light produced by multiple mirrors, DLP creates a final link to display visual information.
  17. 17. Future Roadmap: DLP projectors are becoming more common in business environments as it incorporates high-definition image creation. Scientist and developers are likely to discover even more uses for DMDs and DLP technology in the future.
  18. 18. References: Digital light processing and its future applications, International Journal of Scientific and Research Publications, Volume 3, Issue 4, April 2013 1 ISSN 2250-3153. Digital Light Processing™: A New MEMS-Based Display Technology Larry J. Hornbeck Texas Instruments P. Van Kessel, L. Hombeck, R. Meier and M. Douglass, “A MEMS- Based Projection Display,” Proc. IEEE, Vol. 86, No. 8, pp. 1687-1704, August, 1998 . Rainbow effect, guides/rainbow-effect-2/#sthash.DEBP38Ek.dpuf