????????? The Prospects of Field Emission Displays ???? FED??? ??? ??

1
?????????The Prospects of Field Emission
Displays???? FED??? ??? ??
2
? ? ? ?

• ? FED vs other displays.
• ? What is the Field Emission Display (FED)?
• ? Kinds of field emission display.
• The traditional FEDs PixTech, Motorola,
• Candescent/Sony, Futaba.
• The New Approaches pFED, SED and
• CNT FED.
• ? The prospects of commercial FED.

3
? ? ? ?

• ? FED vs other displays.
• ? What is the Field Emission Display (FED)?
• ? Kinds of field emission display.
• ?The traditional FEDs PixTech, Motorola,
• Candescent/Sony, Futaba.
• ? The New Approaches pFED, SED and
• CNT FED
• ? The prospects of commercial FED.

4
FED?????????????
45?FED 21?OLED 42?PDP 42?LCD 32?CRT
Low Cost ? ? X X ?
Viewing Angle / environment ? (free) ? (free) ? (free) X (lt160o) ? (free)
Life time ? (????? 2?hr) X (6?hr) ? (1?hr) ? (6?hr) ? (5?hr)
Response time ? (lt1ms) ? (lt1ms) ? (lt1ms) X (8ms) ? (lt1ms)
Low Power Consumption ? (lt150W) ? (lt150W) X (385W) ? (240W) ? (200W)
High Resolution ? (1920x1080) ? (1920x1080) X (1024x768) ? (1920x1080) X (525line)
Brightness ? (gt800nits) ? (400nits) ? (640nits) ? (600nits) ? (800nits)
Contrast (Dark) ? (100001) ? (50001) ? (30001) X (10001) ? (50001)
Color Fidelity ? (94NTSC) ? (75NTSC) ? (90NTSC) ? (72NTSC) ? (75NTSC)
? good ? medium X bad
5
FED????
Different Technologies their limitations
TFT-LCD
Existing Technologies
Complex vacuum process, yield problems as size
increases
CRT
PDP
Various Pixel Module Display
Bulky, large screens costly to manufacture
Power hungry, inefficient as smaller screen,
expensive electronics
Relative expensive to mfg. operate, separate
pixels-discontinuous heavy panel
1 10 20 30 40 50 60 Screen Diagonal
Source Materials World, Vol. 8, pp22-25
OLED
Tip FED Flat FED Printable FED
Emerging Technologies
6
????????????????????
????????????HDTV?????????????????X-ray?????STM????
7
? ? ? ?

• ? FED vs other displays.
• ? What is the Field Emission Display (FED)?
• ? Kinds of field emission display.
• ?The traditional FEDs PixTech, Motorola,
• Candescent/Sony, Futaba.
• ? The New Approaches pFED, SED and
• CNT FED
• ? The prospects of commercial FED.

8
CRT ? Field Emission Display
1.CRT?FED?????????????(CL)???? 2.CRT??????????,?FE
D?????????????
9
? CRT???????Richardson??????? Richardson const.
, ???????? ?,?????Eext???,??????
? ? FED??????,??????,???????? ??,????,??????F
owler-Nordheim???? ?? ,A?B???,??
, ß ???????,??emitter?????
10
FED?????????
CNT
11

• FED?????????
• FED???????,??????????black matrix??,????(pixel)??
  ????????????,????????????????
• FED????????,??????????????????,???????????,??????
  ???,?????????
• FED????Gate?????emitter??????,??????????????????,
  ???CRT???CL????,????FED?????CRT?
• FED??????????????????????,???CRT?????????????????
  ?,??CRT?????????400mm?FED??1mm???

12
FED?????????

• CRT??????25KeV???????????????????,?FED????????????
  ????????,????????????,??FED??????????????
• ??FED??????????????????????
• ??????HDTV?????????
• ???????????
• FED???????,?????????,????????????????
• ???????,????????(ESD)???106cm-2???????????????????
  
• ???????????????????????????,?????????

13
? ? ? ?

• ? FED vs other displays.
• ? What is the Field Emission Display (FED)?
• ? Kinds of field emission display.
• ?The traditional FEDs PixTech, Motorola,
• Candescent/Sony, Futaba.
• ? The New Approaches pFED, SED and
• CNT FED
• ? The prospects of commercial FED.

14
Spindt Type FED
Typical System Design of Spindt-FED
15
Spindt Type FED
PixTech FED
PixTech 5.2
In field emission displays, electrons coming
from millions of tiny micro-tips pass through
gates and light up pixels on a screen.
16
Spindt Type FED
PixTech FED
?? Micron Display Technology ???FED Spacer Posts
17
Spindt Type FED
Motorola
18
Spindt Type FED
?? Candescent ??? Sony ????? FED
??Candescent???Sony?2000?5??SID????????FED??,??5.3
???13.2??Spacer?????(Wall)??,???55µm,??1270µm,??
278mm????,?Spacer????23????????????????????????
19
Spindt Type FED
Candescent ThinCRT Technology
Image from 13.2 in. SVGA 18-bit color
Sony/Candescent Joint Development Display
20
Futaba (14.4SVGA / 2005)
Spindt Type FED
21
Why the traditional FEDs are going out?
Cost, Cost, Cost, ...
? Small Size Display Only
? High Voltage Driver IC
? Spacer Technology
? Low Throughput Self-Aligned Spindt Emitter
? IC Process
22
Whats next?
? Large Size Display Possible
? Lower Voltage Driver IC
? Improved Spacer Technology
? Thin Film Technology
? Printing Process
23
? ? ? ?

• ? FED vs other displays.
• ? What is the Field Emission Display (FED)?
• ? Kinds of field emission display.
• ?The traditional FEDs PixTech, Motorola,
• Candescent/Sony, Futaba.
• ?The New Approaches pFED, SED and
• CNT FED
• ? The prospects of commercial FED.

24
PFE-pFED
pFED
25
pFED
PFE-pFED
PFE?FED?????????????(???graphite?DLC?CNT)?????,?
??????????????,?????????1um,?????????10nm??????
???emitter?,??gate oxide?gate??,????????????,gate?
??gate oxide?????,???????emitter??????????,???????
?????????? Emitter?????????MIM??????,??MIV??????
?????,??????emitter?????
26
pFED
PFE-pFED
The Electron Emission Mechanism
PFE emitter technology utilises the source of
pre-breakdown current
PFEs Screen Printable Cold Cathode MIMIV
Structure
27
Hop-FED
PFE??Philip???,??????????????Hop-Plate?Hop-Plate??
?spacer?,??????????????????,?
28
The Hop-FED homogenises and focuses the output of
many emitting sites
Hop-Flue FED
PFE-pFED
???????,?Hop-Plate?????????Flue-Plate,????arcing??
,????Hop-Plate??????????????,?Flue-Plate?spacer???
??????????
29
PFE-pFED
Hop-FED

• Hop-FED (with Hop and Flue)
• Significant Improvement in uniformity and
  contrast when Hop and Flue plates are
  implemented.
• Improvement in both inter-pixel and intra-pixel
  uniformity, and contrast, clearly visible also
  no doughnuts.
• No cross-talk (will give excellent colour purity)
• Closer packing possible - even with these pixels
  which are not yet optimised for smaller geometry

With hop only
With hop and flue
30
PFE-pFED
31
Canon/Toshiba Surface-Conduction
Electron-Emitter Display (SED)

• Fault line formation
• Low driving voltage (10 V)
• Suppression of spread of electron
• Conventional CRT phosphor
• Large area panel

Nomura et al. (1996)
32
SED
SED???????????????Pt??,??????10um??????ink-jet??
??PdO,??PdO???????????,????????10nm??????
?????????,?10nm??????????PdO?????????,????????????
??????????????
33
36 SED Display at Canon/Toshiba
(Surface-conduction Electron-emitter
Display,???????????)
Announced on Sep. 14, 2004
contrast ratio gt86001
?????????!(?????????????????)????????????????,
SED????????????????????36??SED??????????86001????
PDP???????????30001??,???????10001??,????SED????
????????????PDP???????????????????????????,?SED???
????,???????????????
34

• CNT-FED????????????????
• ??NEC??????????????LG???
• ???????????
• CNT???????????
• ???(aspect ratio)??????????,??????
• Conductivity????????
• ???????????

35
SID 2000 Display of the YearSilver Award Winner
CNT- FED
ISEs Field Emission Lamp Module
Source ISE (2001)
36
CNT- FED
ISEs FED
37
CNT- FED
ISEs FED
38
CNT- FED
Samsungs CNT-FED
Samsung ?2003?IVMC???????38?CNT FED
Test image of a fully sealed 9-inch CNTs-FED
(Samsung)
39

• The prospects of commercial FED
• CNT????????,?????????????emitter???????,?LCD????(B
  LU)???????????,?????????,??CNT-FED?????
• ??????FED??,??pFED?SEDCNT-FED???Toshiba
  Cannon?????2007?????SED?CNT??????????????????????
• ?????FED????

40

• ?????FED?????
• ?????92???????FED????,??????????????????????????
  ?,????????4?color FED panel?
• ?????CRT?TFT-LCD?PDP?????,?FED???????,??????????
  ???
• ??????FED??? ????????????? ?,????????????????????
  ?
• ??printable spacer ??????????????Spacer??,??????P
  DP rib???,????????
• ??MIMIV?PFE IPs?????emitter?insulator??,??spacer??
  ????????????,??MIMIV????,??????????????

41
A9294?Dynode????????????????(??????) B9596?2
0??????????(??????-???) C97???40???????????? D9
8?BLU?? E99???40????????????
42
Thanks for your attentions.
Comments are welcome!