1. ELECTROLUMINESCENT DISPLAYS

2. 4.2. Operating Principles of TFEL Devices
Electroluminescent Displays 목차
4.1. 서론
4.2. Operating Principles of TFEL Devices
4.3. Electrical Characterization of TFEL Devices
4.4. EL 디스플레이
4.5. ELD의 응용
4.6. 결론

3. Electroluminescent Displays
4.1. 서론

4. Electroluminescent Displays

5. 전계발광 디스플레이의 역사  EL emission from ZnS phosphor powder found in
Electroluminescent Displays
전계발광 디스플레이의 역사
 EL emission from ZnS phosphor powder found in
1936 by Destriau (yellow emission).
 AC powder EL studied until 1960 but efficiency and
life time very poor.
 AC thin-film EL(TFEL) with long life time
developed by Inoguchi.
 Volume production of monochrome ELD in 1983 by
Planar Systems.

6. Electroluminescent Displays

7. Electroluminescent Displays

8. Electroluminescent Displays

9. Electroluminescent Displays

10. EL480.240-PR2 EL Panel EL640.480-AM1 EL Display
Electroluminescent Displays
EL PR2 EL Panel
EL AM1 EL Display

11. Fig. (a) Standard and (b) inverted ac TFEL stack.
Electroluminescent Displays
Fig. (a) Standard and (b) inverted ac TFEL stack.

12. Figure 1. Structure of Thin Film EL
Electroluminescent Displays
Figure 1. Structure of Thin Film EL

13. Figure 1. Structure of Thin Film EL
Electroluminescent Displays
Figure 1. Structure of Thin Film EL

14. Fig. Structure of a conventional TFEL device
Electroluminescent Displays
Fig. Structure of a conventional TFEL device

15. Electroluminescent Displays
Fig. Physical processes resulting in light emission from an an TFEL stack.

16. Electroluminescent Displays

17. Figure 2. Integral Contrast Enhancement
Electroluminescent Displays
Figure 2. Integral Contrast Enhancement

18. Figure 3. EL Temperature Range Figure 4. Wide Viewing Angle
Electroluminescent Displays
Figure 3. EL Temperature Range
Figure 4. Wide Viewing Angle

19. Low Electromagnetic Interference (EMI) means
Electroluminescent Displays
Low Electromagnetic Interference (EMI) means
simplified designs and "clean" environments
Figure 5. EMI Signature

20. Figure 6. Fast Response Time
Electroluminescent Displays
Fast Response Time means
crisp, clear and accurate wave form representations.
Figure 6. Fast Response Time

21. Long Term Reliability means
Electroluminescent Displays
Long Term Reliability means
reduced warranty cost and improved customer satisfaction.
Figure 7. Lifetime Hours

22. Electroluminescent Displays

23. Fig. EL Emission Spectra of ZnS:Mn Phosphor.
Electroluminescent Displays
Fig. EL Emission Spectra of ZnS:Mn Phosphor.

24. Fig. EL Emission Spectra of ZnS:Tb Phosphor.
Electroluminescent Displays
Fig. EL Emission Spectra of ZnS:Tb Phosphor.
Fig. EL Emission Spectra of ZnS:Mn Phosphor.

25. Fig. EL Emission Spectra of CaS:Eu, CaS:Ce, and SrS:Ce Phosphors.
Electroluminescent Displays
Fig. EL Emission Spectra of CaS:Eu, CaS:Ce, and SrS:Ce Phosphors.

26. Fig. EL Emission Spectra of CaGa2S4:Ce Phosphor.
Electroluminescent Displays
Fig. EL Emission Spectra of CaGa2S4:Ce Phosphor.

27. Electroluminescent Displays
C.I.E.
Chromaticity
Diagram

28. SrS:Ce/ZnS:Mn broad band phosphor
Electroluminescent Displays
SrS:Ce/ZnS:Mn broad band phosphor
Fig. EL Emission Spectra of "white" Phosphor at 60 Hz and 5 kHz Drive Frequency

29. Electroluminescent Displays
Active Area: 0.61"x0.45"
Total Thickness: 68 mils (1.7 mm)
Matrix: 640x480
Density: 1000 lpi
Monochrome Wavelength: Yellow (585 nm)
31 cycles/frame: 75 fL (257 cd/m2)
Contrast Ratio: 100:1
Display Power Typical Pattern: 0.5 W Maximum: 0.7 W
Defects Pixels: < 10, Lines: 0
Weight < 3 grams
Data Refresh Rate: 60 frames/ sec.
Operating Temperature Min. / Max.: -40deg;C to +75°C
Monochrome AMEL Display

30. Electroluminescent Displays
Active Area: 0.61"x0.45"
Total Thickness: 0.36" (9.1 mm)
Color Matrix: 640x480
Density: 1000 lpi
@ 30 cycles/frame: 10fL (34 cd/m2) [goal=30fL]
Contrast Ratio: 100:1
Display Power
Typical Pattern: 1.3 W
Maximum: < 2.0 W
Defects Pixels: < 10
Lines: 0
Weight < 10 grams
Data Refresh Rate: 60 frames/ sec.
Operating Temperature
Min. / Max.: -20°C to +50°C
Color Active Matrix EL Displays