Liquid-crystal display driving method using asymmetric...

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

Reexamination Certificate

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Details

C345S096000, C345S208000, C345S209000, C345S097000, C349S037000

Reexamination Certificate

active

06975297

ABSTRACT:
Disclosed is a method for driving an active matrix type liquid crystal display device including a first electrode, a second electrode, and a liquid crystal layer interposed between the first and the second electrodes, and the liquid crystal layer having a larger polarization when a voltage of a first polarity is applied to the first electrode against the second electrode than that when a voltage of a second polarity different from the first polarity is applied to the first electrode against the second electrode, the method comprising dividing a frame into a first field and a second field, applying a first voltage of the first polarity to the first electrode during the first field, generating a second voltage from the first voltage by changing its polarity, a magnitude of the second voltage being modified by an amount of ΔV (ΔV≠0) based on a magnitude of the first voltage in a direction of the first polarity when the first voltage is not zero, and applying the second voltage to the first electrode during the second field.

REFERENCES:
patent: 6297792 (2001-10-01), Takahashi
patent: 6344889 (2002-02-01), Hasegawa et al.
patent: 6496170 (2002-12-01), Yoshida et al.
patent: 11-133380 (1999-05-01), None
patent: 2000-292774 (2000-10-01), None
Pauwels et al., “Analysis of the Asymmetic Continuous Director Rotation Mode of Ferroelectric Liquid Crystal Displays;” Conference Record of the 20thInternational Display Research Conference, pp. 72-75, Sep. 25, 2000.
Saishu et al., U.S. Appl. No. 09/942,743, filed Aug. 31, 2001.
Hasegawa et al., U.S. Appl. No. 09/801,812, filed Mar. 9, 2001.
Baba et al., U.S. Appl. No. 09/899,220, filed Jul. 6, 2001.

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