Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2006-04-18
2006-04-18
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S087000
Reexamination Certificate
active
07030865
ABSTRACT:
In a period T1(positive polarity) in which a voltage level of a counter electrode VCOM becomes VC1, a data line is driven using P-type operational amplifier OP1having P-type driving transistor, while in a period T2(negative polarity) in which VCOM becomes VC2, the data line is driven using N-type operational amplifier OP2having N-type driving transistor. An output of a selection circuit for the operational amplifiers OP1, OP2is set to the high impedance state when VCOM is changed over. At the time of driving the operational amplifier OP1, a current which flows in current sources of the operational amplifier OP2is cut off, while at the time of driving the operational amplifier OP2, a current which flows in current sources of the operational amplifier OP1is cut off. In the period before the operational amplifiers OP1, OP2are driven, the driving transistors of the operational amplifiers OP1, OP2are turned off. The voltage level of the data line can be changed before driving by positively utilizing the parasitic capacitance between the counter electrode and data line.
REFERENCES:
patent: 4906984 (1990-03-01), Takeda et al.
patent: 5625387 (1997-04-01), Moon
patent: 5627457 (1997-05-01), Ishiyama et al.
patent: 6118421 (2000-09-01), Kawaguchi et al.
patent: 6172663 (2001-01-01), Okada et al.
patent: 6496175 (2002-12-01), Fukuo
patent: 6995741 (2006-02-01), Ishiyama
patent: 7006070 (2006-02-01), Ishiyama
patent: 2118471 (1987-09-01), None
patent: 2188471 (1987-09-01), None
patent: A 05-014064 (1993-01-01), None
patent: A 06-149188 (1994-05-01), None
patent: A 7-98577 (1995-04-01), None
patent: A 7-281639 (1995-10-01), None
patent: A 07-281640 (1995-10-01), None
patent: A 08-122733 (1996-05-01), None
patent: A 08-251518 (1996-09-01), None
patent: A 09-230829 (1997-09-01), None
patent: A 11-150430 (1999-06-01), None
patent: A 11-259052 (1999-09-01), None
patent: A 2001-004974 (2001-01-01), None
Lesperance Jean
Oliff & Berridg,e PLC
Seiko Epson Corporation
Wu Xiao
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