Liquid crystal display panel capable of reducing persistence...

Details Liquid crystal display panel capable of reducing persistence... Liquid crystal display panel capable of reducing persistence...

2006-08-22

2006-08-22

Nguyen, Dung T. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

Reexamination Certificate

active

07095473

ABSTRACT:
AC voltage of rectangular wave is applied between a pixel electrode25A and a common electrode23A, and the amplitude Vac of the AC voltage component and the DC voltage component Vdc thereof are changed to measure the range of optimal DC component variation ΔVdc and determine a structure or material of a liquid crystal display device so as to lower ΔVdc less than a given value, wherein ΔVdc=|Vdcb−Vdcw|, Vdcb is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying black (2V), and Vdcw is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying white (7 V). Thickness of an insulating layer26A on the pixel electrode25A and on the common electrode23A are the same. Electrode crossover portions are made to be in axial symmetry. The top surface of each stripe electrode of a pixel electrode has convex shape in cross section.

REFERENCES:
patent: 6341003 (2002-01-01), Ashizawa et al.
patent: 6512565 (2003-01-01), Lee et al.
patent: 6525798 (2003-02-01), Yamakita et al.
patent: 6784967 (2004-08-01), Ko et al.
patent: 8-220518 (1996-08-01), None
patent: 11-167126 (1999-06-01), None
patent: WO 96/00408 (1996-01-01), None

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