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Field Emission Displays
The future of display technology?
Presentation Outline
History of display technology
Current display alternatives
How FEDs work
Companies working on FED
Difficulties with FED
Future of FED displays
History of Display Technology
Cathode Ray Tube
1950’s
Cathode Ray Tubes (CRT)
Liquid Crystal Display
Plasma Display Panel
Technology Comparison
Technology Comparison cont’d
Advantages
Good color representation
Large viewing angle
Fast response time (50 µs)
Low price
Multiple resolutions
Shortcomings
Large and bulky (2 kg/in)
Flicker causes eye strain
High power (11 W/in)
Technology Comparison cont’d
Technology Comparison cont’d
Advantages
Shortcomings
Light weight (0.6 kg/in)
Low power (5 W/in)
Less eye strain
High brightness (500 Cd/m2)
Small viewing angle
Slow response time (8 ms)
Weaker contrast & color
Technology Comparison cont’d
Technology Comparison cont’d
Advantages
Shortcomings
High brightness (1000 Cd/m2)
High contrast (10000:1)
Large viewing angle
More power vs LCD (8 W/in)
Burn-in effect
Size limitation (>40”)
Slow response time
FED: The Best of Both Worlds
Promised Advantages
Very light (100 g/in)
Large Viewing angle (178o)
Extremely fast (20 ns)
Low power (0.2 W/in)
High contrast (10x PDP)
No flicker
No dead pixels
How FED Works?
Array of mini-CRTs
Technology Options - SED
Technlogy Options - Spindt
Technology Options - CNT
Companies Researching FED
Canon and Toshiba joint venture in SED
Sony promises Spindt-type FED display in 2009
Samsung is researching CNTs, Applied Nanotech Inc. have made a 25” display
Challenges: Technical Problems
Fluctuations in emission current
Low cost manufacturing methods
Developing for large areas
Tip damage
High vacuum levels required
Dropping LCD prices
LCD panels are dropping in cost while increasing in quality
Hope for FED Displays
The success of FEDs depends on:
Cost
Quality
Timing