Online proceedings - EDA Publishing Association

11-13
May 2011, Aix-en-Provence, France
15.4 Square 2296 3008 712 31
10.5 Circular 2279 3669 1390 61
15.4 Circular 2343 3538 1195 51
(a)
Fig. 11. The brightness of OLED square/circular lens and no medium.
(b)
Fig. 10. Comparison of the brightness of the same OLED panel (a) with and
(b) without the MLA film.
Table 4 The brightness of OLED with square/circular lens and no medium.
Fig. 12. The brightness of OLED with square/circular lens and silicon oil
medium.
Lens
height
(μm)
Shape
Original
brightness
(cd/m 2 )
Brightness
with lens
(cd/m 2 )
Increase
amount
(cd/m 2 )
Increase
ratio
(%)
10.5 Square 2336 3060 724 31
15.4 Square 2311 2588 277 12
10.5 Circular 2284 3106 822 36
15.4 Circular 2309 2956 647 28
Table 5 The brightness of OLED with square/circular lens and silicon oil
medium.
Lens
height
(μm)
Shape
Original
brightness
(cd/m 2 )
Brightness
with lens
(cd/m 2 )
Increase
amount
(cd/m 2 )
Increase
ratio
(%)
10.5 Square 2299 3265 966 42
15.4 Square 2311 2773 462 20
10.5 Circular 2303 3339 1036 45
15.4 Circular 2323 3206 883 38
Table 6 The brightness of OLED with square/circular lens and Ag silicon oil
medium.
Lens
height
(μm)
Shape
Original
brightness
(cd/m 2 )
Brightness
with lens
(cd/m 2 )
Increase
amount
(cd/m 2 )
Increase
ratio
(%)
10.5 Square 2332 3707 1375 59
Fig. 13. The brightness of OLED with square/circular lens and Ag silicon oil
medium.
IV. CONCLUSION
A new method to improve the external quantum efficiency
of OLED has been developed. The result shows the brightness
affect by the medium in OLED. When sliver particle add into
silicon oil in OLED, the brightness increase significantly.
When the lens is 11μm in height, 30μm in diameter, and
50μm in gap, add sliver particle into silicon oil increase
OLED brightness by up to 61%.
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