Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2006-05-16
2006-05-16
Awad, Amr A. (Department: 2677)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S077000, C345S082000, C345S083000, C345S214000, C345S690000, C315S169300
Reexamination Certificate
active
07046240
ABSTRACT:
A display device capable of obtaining a constant luminance without being influenced by temperature change is provided as well as a method of driving the display device. A current mirror circuit composed of a first transistor and a second transistor is provided in each pixel. The first transistor and second transistor of the current mirror circuit are connected such that their drain currents are kept almost equal irrespective of the level of load resistance. By controlling the OLED drive current using the current mirror circuit, a change in OLED drive current due to fluctuation in characteristics between transistors is avoided and a constant luminance is obtained without being influenced by temperature change.
REFERENCES:
patent: 5684365 (1997-11-01), Tang et al.
patent: 5952789 (1999-09-01), Stewart et al.
patent: 5990629 (1999-11-01), Yamada et al.
patent: 6023259 (2000-02-01), Howard et al.
patent: 6091203 (2000-07-01), Kawashima et al.
patent: 6229506 (2001-05-01), Dawson et al.
patent: 6307322 (2001-10-01), Dawson et al.
patent: 6331844 (2001-12-01), Okumura et al.
patent: 6351078 (2002-02-01), Wang et al.
patent: 6366116 (2002-04-01), Juang
patent: 6373454 (2002-04-01), Knapp et al.
patent: 6452341 (2002-09-01), Yamauchi et al.
patent: 6486606 (2002-11-01), Ting
patent: 6501466 (2002-12-01), Yamagishi et al.
patent: 6535185 (2003-03-01), Kim et al.
patent: 6839057 (2005-01-01), Iguchi
patent: 6859193 (2005-02-01), Yumoto
patent: 2001/0045929 (2001-11-01), Prache et al.
patent: 2001/0055828 (2001-12-01), Kaneko et al.
patent: 2002/0030647 (2002-03-01), Hack et al.
patent: 2002/0135313 (2002-09-01), Koyama
patent: 2002/0180369 (2002-12-01), Koyama
patent: 2003/0043131 (2003-03-01), Iguchi
patent: 2003/0062524 (2003-04-01), Kimura
patent: 2003/0189206 (2003-10-01), Koyama
patent: 2004/0155574 (2004-08-01), Lai et al.
patent: 2004/0239654 (2004-12-01), Okuda
patent: 0 717 446 (1996-06-01), None
patent: 1 102 234 (2001-05-01), None
patent: 1 130 565 (2001-09-01), None
patent: 08-234683 (1996-09-01), None
patent: 10-214060 (1998-08-01), None
patent: 11-282419 (1999-10-01), None
patent: 2000-40924 (2000-02-01), None
patent: 2000-56847 (2000-02-01), None
patent: 2000-138572 (2000-05-01), None
patent: 2000-267164 (2000-09-01), None
patent: 2001-042826 (2001-02-01), None
patent: 2001-147659 (2001-05-01), None
patent: 2001-324958 (2001-11-01), None
patent: 2002-358049 (2002-12-01), None
patent: 2003-022049 (2003-01-01), None
patent: 2003-022050 (2003-01-01), None
patent: 2003-099001 (2003-04-01), None
patent: 2003-114644 (2003-04-01), None
patent: 2003-150109 (2003-05-01), None
patent: 2004-029755 (2004-01-01), None
patent: WO 99/65012 (1999-12-01), None
patent: WO 01/06484 (2001-01-01), None
patent: WO 03/034381 (2003-04-01), None
U.S. Appl. 10/077,760, filed Feb. 20, 2002, Koyama.
U.S. Appl. No. 10/077,830, filed Feb. 20, 2002, Koyama.
R.M.A. Dawson et al.; “The Impact of the Transient Response of Organic Light Emitting Diodes on the Design of Active Matrix OLED Displays”;IEDM 98; pp. 875-878; 1998.
R.M.A. Dawson et al.; “A Poly-Si Active-Matrix OLED Display with Integrated Drivers”;SID 99 Digest; pp. 438-441; 1999.
R.M.A. Dawson et al.; “Design of an Improved Pixel for a Polysiclicon Acitve-Matrix Organic LED Display”;SID 98 Digest; pp. 11-14; 1998.
I.M. Hunter et al.; “Active Matrix Addressing of Poymer Light Emitting Diodes Using Low Temperature Poly Silicon TFTs”;AM-LCD 2000; pp. 249-252; 2000.
Sung Joon Bae et al.; “A Novel Pixel Design for an Active Matrix Organic Light Emitting Diode Display”;SID 2000 Digest; pp. 358-361; 2000.
M. Kimura et al.; “Low-Temperature Poly-Si TFT Display Using Light-Emitting-Polymer”;AM-LCD 2000; pp. 245-248; 2000.
Baldo et al.; “Highly efficient phosphorescent emission from organic electroluminescent devices”;Letters to Nature, vol. 395; pp. 151-154; Sep. 10, 1998.
Baldo et al.; “Very high-efficiency green organic light-emitting devices based on electrophosphorescence”;Applied Physics Letters, vol. 75, No. 1; pp. 4-6; Jul. 5, 1999.
Sedra & Smith; “6.7 MOS Differential Amplifiers”;Micro-Electronics Circuits; pp. 447-456.
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.
Yumoto et al.; “Pixel-Driving Methods for Large-Sized Poly-Si AM-OLED Displays”;Asia Display /IDW '01; pp. 1395-1398; 2001.
Awad Amr A.
Fish & Richardson P.C.
Kovalick Vincent E.
Semiconductor Energy Laboratory Co,. Ltd.
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