Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure
Reexamination Certificate
2005-03-22
2005-03-22
Nelms, David (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
C257S079000, C257S072000
Reexamination Certificate
active
06870192
ABSTRACT:
By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.
REFERENCES:
patent: 4523189 (1985-06-01), Takahara et al.
patent: 4951041 (1990-08-01), Inada et al.
patent: 5247190 (1993-09-01), Friend et al.
patent: 5399502 (1995-03-01), Friend et al.
patent: 5414443 (1995-05-01), Kanatani et al.
patent: 5552678 (1996-09-01), Tang et al.
patent: 5641991 (1997-06-01), Sakoh
patent: 5847516 (1998-12-01), Kishita et al.
patent: 5882761 (1999-03-01), Kawami et al.
patent: 5990629 (1999-11-01), Yamada et al.
patent: 6023259 (2000-02-01), Howard et al.
patent: 6064158 (2000-05-01), Kishita et al.
patent: 6087245 (2000-07-01), Yamazaki et al.
patent: 6121943 (2000-09-01), Nishioka et al.
patent: 6151006 (2000-11-01), Yanagi et al.
patent: 6380689 (2002-04-01), Okuda
patent: 6452341 (2002-09-01), Yamauchi et al.
patent: 6529178 (2003-03-01), Kimura
patent: 20010054991 (2001-12-01), Kimura et al.
patent: 20020000613 (2002-01-01), Ohtani et al.
patent: 10-92576 (1998-04-01), None
patent: WO 9013148 (1990-11-01), None
Zou et al.; “Improvement of Current-Voltage Characteristics in Organic Light Emitting Diodes by Application of Reversed-Bias Voltage”;Japan Journal of Applied Physics, vol. 37, Part 2, No. 11B; pp. L1406-L1408; Nov. 15, 1998.
Baldo et al.; “Highly Efficient Phosphorescent Emission From Organic Electroluminescent Devices”;Nature, vol. 395, pp. 151-154; Sep. 10, 1998.
Baldo et al.; “Very High-Efficiency Green Organic Light-Emitting Devices Based on Electrophorescence”;Applied Physics Letters, vol. 75, No. 1; pp. 4-6; Jul. 5, 1999.
Tsutsui et al.; “High Quantum Efficiency in Organic Light-Emitting Devices with Iridium-Complex as a Triplet Emissive Center”;Japan Journal of Applied Physics, vol. 38, Part 2, No. 12B; pp. L1502-L1504; Dec. 15, 1999.
Tsutsui et al.; “Electroluminescence in Organic Thin Films”;Photochemical Processes in Organized Molecular Systems, pp. 437-450; 1991.
Schenk et al.; “Polymers for Light Emitting Diodes”;EuroDisplay '99; The 19thInternational Display Research Conference Proceedings; pp. 33-37; Sep. 6-9, 1999.
Akiba Mai
Koyama Jun
Yamazaki Shunpei
Nelms David
Nguyen Thinh T
Semiconductor Energy Laboratory Co,. Ltd.
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