Seminar ppt

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Seminar
On
Digital Light
Processing

2. CONTENT
 Introduction
 Important Basic Concepts of DLP
 How DLP works ?
 DLP Structure
 Models of DLP
 Advantages of DLP
 Conclusion
 References

3. INTRODUCTION
 Digital Light Processing is the one of primary display
technologies driving this rapid growth and maturation .
 it is a revolutionary way to project and display
information based on the Digital Micro Mirror Device
(DMD) Digital Light processing was invented in 1987
by Texas Instruments it creates the final link to display
digital visual information.

4. IMPORTANT BASIC CONCEPTS OF DLP

5. HOW DLP WORKS ?
 Signal Conversion
 Gray Scale Image
 Color Creation

6. SIGNAL CONVERSION
 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.

7. GRAY SCALE IMAGE
 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

8. COLOR CREATION
 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.

9. DLP STRUCTURE

10. DMD MODULATER STRUCTURE

11. MODELS OF DLP
 Like digital video camcorders, DLP devices come in
either one or three chip models.
 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.
 Only one DMD chip is used to process the primary red,
green and blue colours.
 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.

12. ADVANTAGES OF DLP
 Brighter
 Sharper
 Versatile
 More reliable
 Consistent picture quality

13. CONCLUSION
 We have described the basic processing blocks DLP has
a number of potential uses beyond home theatre,
television and film projector.
 Other application that could incorporate its high-
definition image creation are photo finishing , three
dimensional visual displays, holographic storage,
microscopes and medical imaging.
 Scientist and developers are likely to discover even more
uses for DMDs and DLP technology in the future.

14. REFERENCES
 www.google.com
 www.wikipedia.com
 www.studymafia.org

15. THANKS