Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Reexamination Certificate
2006-05-08
2008-08-12
Shalwala, Bipin (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
C345S036000, C345S048000, C345S077000, C345S204000, C345S205000, C345S690000, C315S169300
Reexamination Certificate
active
07411586
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
patent: 5952789 (1999-09-01), Stewart
patent: 5990629 (1999-11-01), Yamada
patent: 6023259 (2000-02-01), Howard
patent: 6091203 (2000-07-01), Kawashima
patent: 6229506 (2001-05-01), Dawson
patent: 6307322 (2001-10-01), Dawson
patent: 6331844 (2001-12-01), Okumura et al.
patent: 6351078 (2002-02-01), Wang
patent: 6366116 (2002-04-01), Juang
patent: 6373454 (2002-04-01), Knapp
patent: 6452341 (2002-09-01), Yamauchi
patent: 6486606 (2002-11-01), Ting
patent: 6501466 (2002-12-01), Yamagishi
patent: 6535185 (2003-03-01), Kim
patent: 6753654 (2004-06-01), Koyama
patent: 6777710 (2004-08-01), Koyama
patent: 6839057 (2005-01-01), Iguchi
patent: 6859193 (2005-02-01), Yumoto
patent: 2001/0045929 (2001-11-01), Prache
patent: 2001/0052941 (2001-12-01), Matsunaga et al.
patent: 2001/0055828 (2001-12-01), Kaneko
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: 09-329806 (1997-12-01), 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
Office Action (China Application No. 02142123.4), dated Dec. 29, 2006 with English translation.
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.
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 Polysilicon Active-Matrix Organic LED Display”;SID 98 Digest; pp. 11-14; 1998.
I.M. Hunter et al.; “Active Matrix Addressing of Polymer 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.
Fish & Richardson P.C.
Kovalick Vince E
Semiconductor Energy Laboratory Co,. Ltd.
Shalwala Bipin
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