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  • 1. CET ,DIGITAL SIGNAL PROCESSING SURFACE CONDUCTION ELECTRON EMITTER DISPLAY (SED) MAHANTESH R.CHOUDHARI DIGITAL SIGNAL PROCESING
  • 2. CET ,DIGITAL SIGNAL PROCESSING A Surface-conduction Electron-emitter Display (SED) is a flat panel display technology currently being developed by a number of companies. Canon began SED research in 1986 and, in 2004, Toshiba and Canon announced a joint development agreement originally targeting commercial production of SED’s by the end of 2010. SED will be the next generation display technology in the near by future. Hopefully we will see a Canon SED display since CEATEC (Combined Exhibition of Advanced Technologies)LAB in Japan started developing on SED Display Panels TECHNOLOGY DEVELOPMENT:
  • 3. CET ,DIGITAL SIGNAL PROCESSING SED’s use nanoscopic scale electron emitters to energize colored phosphors and produce an image. In a general sense, a SED consists of a matrix of tiny cathode ray tubes, each "tube" forming a single sub-pixel on the screen grouped in threes to form red-green-blue (RGB) pixels. A Surface-conduction Electron-emitter Display (SED) is a flat panel display technology that uses Surface Conduction Electron emitters (SCE’s) for every individual display pixel. The surface conduction electron emitter emits electrons that excite a phosphor coating on the display panel. WHAT IS SED??????????
  • 4. CET ,DIGITAL SIGNAL PROCESSING Working of SED  Creating the picture o The electron emitting device o Electrons emitted from emission region by applying a voltage o SED Display consists of SCE units o Millions of these SCE units are used o A set has three SCE’s for every pixel o Millions of these SCE’s are arranged in a matrix o The matrix activates all the SCE’s needed to create the picture virtually simultaneously
  • 5. CET ,DIGITAL SIGNAL PROCESSING HOW SED Technology Works ???
  • 6. CET ,DIGITAL SIGNAL PROCESSING Internal Structure of SED Internal connections:
  • 7. CET ,DIGITAL SIGNAL PROCESSING
    • OTHER DISPLAY TECHNOLOGIES
    • CRT
    • PLASMA Display
    • LCD Display
    • LED Display
  • 8. CET ,DIGITAL SIGNAL PROCESSING CRT: 1. Three Electron guns (for red, green and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red, green and blue part of displayed image 7. Phosphor layer with red, green and blue zones 8. Close-up of the phosphor-coated inner side of the screen
  • 9. CET ,DIGITAL SIGNAL PROCESSING
    • SED is flat. A traditional CRT has one electron gun that scans side to side and from top to bottom by being deflected by an electromagnet.
    • The gun has had to be set back far enough to target the complete screen area.
    • It starts to get ridiculously large and heavy as size gets increased.
    • CRTs can have image challenges around the far edges of the picture tube
  • 10. CET ,DIGITAL SIGNAL PROCESSING plasma display panel
  • 11. CET ,DIGITAL SIGNAL PROCESSING LCD Display
    • Polarizing filter film with a vertical axis to
    • polarize light as it enters.
    • Glass substrate with electrodes .
    • Twisted nematic liquid crystal.
    • Glass substrate with common electrode film
    • with
    • horizontal ridges
    • to line up with the horizontal filter.
    • Polarizing filter film with a horizontal axis to
    • block/pass light.
    • Reflective surface to send light back to viewer.
  • 12. CET ,DIGITAL SIGNAL PROCESSING LED display
  • 13. CET ,DIGITAL SIGNAL PROCESSING
  • 14. CET ,DIGITAL SIGNAL PROCESSING
    • FEATURES
    • SED’s are usually more compact, lightweight, portable, less expensive,
    • more reliable and
    • easier on the eyes. And also had features like,
    • Contrast ratio 50,000:1.
    • Toshiba's final versions of SED’s will have a contrast ratio of 100,000:1.
    • 2. Response time 0.2 milliseconds.
    • 3. Brightness of 450 cd/m².
    • 4. 180º Viewing angle.
    • 5. Quality of Motion of Pictures is Very Good.
    • 6. Viewable in Bright room.
    • 7. Low power consumption.
    • 8. Longer life expectancy.
    • 9. Light Enough for Wall-Hanging Designs .
  • 15. CET ,DIGITAL SIGNAL PROCESSING APPLICATIONS
    • They can be used in a wide range of applications including: computer monitors ,
    • television , instrument panels, aircraft cockpit displays , signage etc.
    • And in consumer devices such as video players, gaming devices, clocks , watches,
    • calculators , and telephones with SED Display technology.
    • Continued development for commercial applications like medical equipment with
    • SED Display.
    • SED display panel segment is expected to continue displaying growth additionally,
    • the advent of digital Hi-Vision broadcasting and next-generation DVDs with best
    • vision quality.
    • SED monitors can be adopted for military instead of CRT displays because they
    • are smaller, lighter and more efficient.
  • 16. CET ,DIGITAL SIGNAL PROCESSING APPLICATIONS
  • 17. CET ,DIGITAL SIGNAL PROCESSING
    • The Limiting Factors for SED Display Technology Are:
    • As with any phosphor-based technology, SED may also be susceptible to
    • screen burn-in. This was a constant problem for people
    • using CRT television monitors for security camera systems.
    • Early plasmas also had this problem, but with phosphor
    • development, the problem has
    • largely been reduced. And of course we don't know
    • if there are major obstacles yet to be overcome in its development.
    • Highly competitive market situation (Product Costs/price pressure).
    • Process for mass manufacturing seems not mature yet
  • 18. CET ,DIGITAL SIGNAL PROCESSING
    • SED will be the next generation display technology in the near by future.
    • The technology appears to be roughly 1 year away from the market, and of
    • course we don't know if there are major obstacles yet to be overcome in its
    • development.
    • Both Canon and Toshiba are apparently pouring big bucks into making it happen .
    CONCLUSION
  • 19. CET ,DIGITAL SIGNAL PROCESSING
    • REFERENCE
    REFERENCE
    • Emerging Display Technology, IEEE Transactions on Volume 7,
    • Issue 4, July 2009.
    • A paper on SED technology, Department of Communication
    • Technical Paper (http://www.k-ids.or.kr/science/conference/session_B/b4.23.pdf)
    • CEATEC JAPAN -2009/Engineering, National Chiao Tung University.
    • www.canon.com
    • http://www.canon.com/technology/detail/device/sed_display/
    • http://www.hdtvexpert.com/pages/bettersan.htm
    • http://www.hdbeat.com/2005/11/16/sed-made-best-of-whats-new/
    • http://www.dlmag.com/video.php?type=flash&fileid=CES2006-Canon-SED-
    • Demo-480-h264384K_Stream .
    • www.thoshiba.com
  • 20. CET ,DIGITAL SIGNAL PROCESSING THANK YOU