seminar 7thsem

8/2/2019 Seminar 7thsem

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SHRI DADAJI INSTITUTE OF TECHNOLOGY

& SCIENCE

PRESENTATION ON

Field Emmision Display(FED)

Submitted by:

SHUBHANGEE JAIN

4TH year (7TH SEM)


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INTRODUCTION TYPES OF TECHNOLOGY

FED TECHNOLOGY

WORKING

FED CHARACTERISTICS

COMPETING TECHNOLOGY

ADVANTAGE

DISADVANTAGE

APPLICATION

CONCLUSION

REFRENCES


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A field emission display (FED) is a display technology that

incorporates flat panel display technology that uses large-

area field electron emission sources to provide electrons that

strike colored phosphor to produce a color image as a electronic

visual display.

In a general sense, a FED consists of a matrix of cathode ray tubes

each tube producing a single sub-pixel, grouped in threes to form

red-green-blue (RGB) pixels.


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LIQUID CRYSTAL DISPLAY

PLASMA DISPLAY

ELECTRO LUMINESCENT DISPLAY

FIELD EMISSION DISPLAY

PROJECTION DISPLAY


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The FED screen mainly contains three parts:

1.Low-voltage phosphors.

2. A field emission cathode using a thin carbonsheet as an edge emitter.

3.FED packaging, including sealing and vacuum

processing


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1.Brightness2.Speed

3.Compact and lightweight

4.Displaysize

5.Low driving voltage6.Wider viewing angle

7.High illumination

8. Wide temperature extremes

9.ColourQuality


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CATHOD RAY TUBE (CRT)

LIQUID CRYSTAL DISPLAY (LCD)

ORGANIC LED (OLED)

SURFACE CONDUCTION DISPLAY (SED)


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Good color representation. Large viewing angle.

Fast response time (50 s).

Low price.

Multiple resolutions.

Shortcomings.

Large and bulky (2 kg/in).

Flicker causes eye strain.

High power (11 W/in).


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Just like any other displays with individually addressable sub-pixels, FED displays can potentially suffer from manufacturing

problems that will result in dead pixels

FED display requires a vacuum to operate, so the display tube has

to be sealed.

FEDs require high vacuum levels which are difficult to attain:

anically robust.

The efficiency of the field emitters is based on the extremely small

radii of the tips, but this small size renders the cathodes

susceptible to damage by ion impact.


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Sonograms.

X-ray imaging .

Heart-rate monitors .

Laptop computers .Hang-on-the-wall televisions .

Big screen and PC monitors .

High-definition T.V.


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CRT technology has already reached itstechnological and marketing limits and will likely

be replaced in 10 years.

The modern world needs substances that

are small in size. This shows that the cathode ray

tube do not have much to do anything in the

market in future. And it would die already, if Field

Emission Display (FED) technology or any other

displays would bring anything to the market.


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THANK

YOU


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Any question

seminar 7thsem

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