sed

WELCOME:

WELCOME

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PRESENTED BY SUNIL.S 1sgo8cs408 SED

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SED Surface conduction Electron emission Display

CONTENTS. :

CONTENTS. INTRODUCTION HISTORY TECHNOLOGY HOW IT WORKS ADVANTAGES SED CHARACTERISTICS DISADVANTAGES COMPARISION PRICING CONCLUSION REFERENCES

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co-developed by Canon and Toshiba Corporation. An SED display is very similar to a CRT A best inter mix of LCD & CRT technologies uses surface conduction electron emitters for every individual display pixel. INTRODUCTION

HISTORY:

HISTORY Canon began SED research in 1986 in 2004, Toshiba and Canon announced a joint development agreement originally targeting commercial production of SEDs by the end of 2005. During the 2006 Consumer Electronics Show in Las Vegas, Nevada , Toshiba showed working prototypes of SEDs

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The surface conduction electron emitter apparatus consists of a thin slit across which electrons tunnel when excited by moderate voltages. some are scattered at the receiving pole and are accelerated toward the display surface TECHNOLOGY

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SED has thousands of tiny electron guns known as "emitters" for each phosphor sub-pixel. a sub-pixel is just one of the three colors (red, green, blue) that make up a pixel. it takes three emitters to create one pixel on the screen and over 6 million SED emitters to produce a true high definition (HDTV) image! How it works?

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How it works?

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0.2 M illiseconds response time. Brightness of 450 cd/m 2 . 50,000:1 contrast ratio. at the 2006 CES show, Toshiba's final versions of SEDs will ship with a contrast ratio of 100,000:1 Excellent color and contrast potential Wide viewing angle Low power consuption ADVANTAGES

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provide dynamic color expressions, a sharp picture, and perform faster video response . it possible to create screens of more than 40" in size that are only several centimeters thick. CLEAR IMAGES

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SED TV CONTRAST RATIO 100000:1 a large jump in contrast ratio was a broad reduction in black luminance, from 0.04 cd /m2 to 0.003 cd /m2

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SED CHARACTERISTICS Very high contrast ratio. Fast response time. High brightness. 180 degree Viewing angle. Viewable in bright room. It can be used in mobile device display. Low power consuption

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SED may also be susceptible to screen burn- In. High production cost DISADVANTAGES Unknown life expectancy Currently prototype only

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SED TV v/s CRT TV SED TV v/s LCD TV COMPARISON

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LCD's highly directional light, it has a limited angle of view This will not be an issue for SED's self illuminated phosphors. LCD does have the advantage of not being susceptible to burn-in which any device using phosphors will, including SED. SED is likely to use about two-thirds the power of a similarly sized LCD. LCD generally suffers from the same black level issues SED COMPARED TO LCD TV

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A traditional CRT has one electron gun that scans side to side and from top to bottom CRTs are typically as wide as they are deep. but SED need only a few inches of thickness . Screen size can be made as large as the manufacturer dares CRTs can have image challenges around the far edges of the picture tube, which is a non-issue for SED. SED COMPARED TO CRT

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expensive in early production. If it works, the use of inkjet technology to make SED displays rather than the more expensive photolithography process used in LCD panels should help cost management. PRICING

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SED TV 1 ms response time Canon and Toshiba Corporation are jointly working on SED , the new generation of high-quality large flat-screen display.

CONCLUSION:

CONCLUSION All of the claims made by the backers of SED you would think that there should be no reason to buy any other type of display.

REFERENCES:

REFERENCES Finch, C.A., Polyvinyl Alcohol Developments, 1992 John Wiley & Sons, pp. 606-607 Shane , Michael et al, Electrophoretic Deposition of Phosphors, 1994, Academic Press, Inc. pp. 334-340 . IEEE SPECTRUM

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