Liquid crystal display panel capable of reducing persistence degree and development method thereof
First Claim
1. A liquid crystal panel development method, said liquid crystal panel comprising:
- first and second substrate, said first substrate including a first electrode, said first or second substrate including a second electrode, said first and second electrode being for a display voltage to be applied therebetween; and
liquid crystal interposed between said first and second substrates;
said method comprising the steps of;
applying a voltage signal between said first electrode and said second electrode, said voltage signal being composed of an AC voltage component and a DC voltage component Vdc, said AC voltage component having an amplitude Vac;
changing said amplitude Vac and said DC voltage component Vdc to measure the range of optimal DC component variation Δ
Vdc; and
determining a structure or material of said liquid crystal panel such that said range of optimal DC component variation Δ
Vdc becomes less than a given value;
wherein said range of optimal DC component variation Δ
Vdc is defined as Δ
Vdc=|Vdcb−
Vdcw|, wherein Vdcb is a value of said DC voltage component Vdc at which a range of transmittance variation is the minimum when said DC voltage component Vdc is changed with said amplitude Vac being fixed at a value for displaying black, wherein Vdcw is a value of said DC voltage component Vdc at which a range of transmittance variation is the minimum when said DC voltage component Vdc is changed with said amplitude Vac being fixed at a value for displaying white.
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Abstract
AC voltage of rectangular wave is applied between a pixel electrode 25A and a common electrode 23A, 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 layer 26A on the pixel electrode 25A and on the common electrode 23A 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.
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Citations
2 Claims
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1. A liquid crystal panel development method, said liquid crystal panel comprising:
- first and second substrate, said first substrate including a first electrode, said first or second substrate including a second electrode, said first and second electrode being for a display voltage to be applied therebetween; and
liquid crystal interposed between said first and second substrates;
said method comprising the steps of;
applying a voltage signal between said first electrode and said second electrode, said voltage signal being composed of an AC voltage component and a DC voltage component Vdc, said AC voltage component having an amplitude Vac;
changing said amplitude Vac and said DC voltage component Vdc to measure the range of optimal DC component variation Δ
Vdc; and
determining a structure or material of said liquid crystal panel such that said range of optimal DC component variation Δ
Vdc becomes less than a given value;
wherein said range of optimal DC component variation Δ
Vdc is defined as Δ
Vdc=|Vdcb−
Vdcw|,wherein Vdcb is a value of said DC voltage component Vdc at which a range of transmittance variation is the minimum when said DC voltage component Vdc is changed with said amplitude Vac being fixed at a value for displaying black, wherein Vdcw is a value of said DC voltage component Vdc at which a range of transmittance variation is the minimum when said DC voltage component Vdc is changed with said amplitude Vac being fixed at a value for displaying white. - View Dependent Claims (2)
- first and second substrate, said first substrate including a first electrode, said first or second substrate including a second electrode, said first and second electrode being for a display voltage to be applied therebetween; and
Specification