US 8,896,803 B2 · Liquid crystal display device and method of manufacturing the same

Abstract

In accordance with a method of manufacturing a liquid crystal display device including, in a picture element, a first sub-picture-element region where a threshold voltage of the transmittance-applied voltage characteristic is Vth1 and a second sub-picture-element region where a threshold voltage of the transmittance-applied voltage characteristic is Vth2, liquid crystal, which polymerizable components are added to, is filled into the space between a first and a second substrates; thereafter, a voltage V1 slightly higher than the threshold voltage Vth1 is applied to a liquid crystal layer, and is held for a certain length of time; subsequently, a voltage V2 slightly higher than the threshold voltage Vth2 is applied to the liquid crystal layer, and is held for a certain length of time; additionally, a voltage V3 higher than a white-displaying voltage which is applied while the liquid crystal display device is in actual use is applied to the liquid crystal layer, and is held for a certain length of time; then, the polymerizable components are polymerized by irradiation of ultraviolet light; and thus polymers are formed in the liquid crystal layer.

Claims13

Dependent claims

A method of manufacturing a liquid crystal display device including, in a picture element, a plurality of sub-picture-element regions having transmittance-applied voltage characteristics which are different from one region to another, which comprises:

filling liquid crystal, in which polymerizable components are added to, in a space between a first and a second substrates;
and
applying, to the liquid crystal, voltages slightly higher than threshold voltages of the transmittance-applied voltage characteristics in the plurality of sub-picture-element regions, on a step-by-step basis in the ascending order to the voltages, and then polymerizing the polymerizable components while applying a constant voltage far higher than the voltages slightly higher than threshold voltages to the liquid crystal, wherein
each sub-picture element region has a different threshold voltage,
time for which each of the applied voltages slightly higher than the threshold voltages is held is 2 to 30 seconds, and
the constant voltage is held for a predetermined period before the polymerizing of the polymerizable components.

3 more elements

A method of manufacturing a liquid crystal display device including, in a picture element, a first sub-picture-element region where a threshold voltage of the transmittance-applied voltage characteristic is Vth1 and a second sub-picture-element region where a threshold voltage of the transmittance-applied voltage characteristic is Vth2 (Vth2>Vth1), which comprises:

filling liquid crystal, in which polymerizable polymers are added to, in the space between a first substrate and a second substrate;
applying to the liquid crystal, and holding, a first voltage lower than the threshold voltage Vth1;
applying to the liquid crystal, and holding, a second voltage, which is higher than the threshold voltage Vth1, and which is lower than the threshold voltage Vth2;
applying to the liquid crystal, and holding, a third voltage, which is higher than the second voltage, and which is lower than the threshold voltage Vth2;
applying to the liquid crystal, and holding, a fourth voltage, which is higher than the threshold voltage Vth2;
and then
only after applying the first to the fourth voltages to the liquid crystal, forming polymers by means of polymerizing the polymerizable components in the liquid crystal while applying, to the liquid crystal, any one of the fourth voltage and a fifth voltage higher than the fourth voltage.

4 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device and method of manufacturing the same

Life of this patent

Liquid crystal display device and method of manufacturing the same

Life of this patent

Abstract

Claims13