In-plane switching mode liquid crystal display device

1. An in-plane switching mode liquid crystal display device comprising:

first and second substrates;

a plurality of gate and data bus lines defining pixel regions and arranged on the first substrate;

a common line in the pixel region, the common line and the data bus lines having a crossing relationship;

a pair of first and second electrodes parallel to each other applying plane electric fields in the pixel regions; and

a liquid crystal layer between the first and second substrates;

wherein dΔn is in the range of 0.29-0.36 μm and transmittance is greater than or equal to 60 percent, where d is the thickness of the liquid crystal layer, and Δn is the refractive anisotropy of the liquid crystal molecule;

a plurality of thin film transistors adjacent respective cross points of the gate and data bus lines, each of the thin film transistors including a gate electrode, a gate insulator, a semiconductor layer, and source and drain electrodes;

a passivation layer on the thin film transistors;

a first alignment layer on the passivation layer;

a black matrix for preventing light from leaking around the TFTs gate bus line and data bus line;

a color filter layer on the second substrate; and

a second alignment layer on the color filter layer,

wherein the first and second alignment layers comprises polysiloxanecinnamate; and

wherein dΔn is selected to achieve a desired light transmittance and color-shift.

2. The in-plane switching mode liquid crystal display device according to claim 1 , wherein the first electrode includes data electrode and the second electrode includes common electrode.

3. The in-plane switching mode liquid crystal display device according to claim 1 , wherein the passivation layer includes one of SiNx and SiOx.

4. The in-plane switching mode liquid crystal display device according to claim 1 , wherein the common line is substantially perpendicular to the data bus lines.

5. A method of making an in-plane switching mode liquid crystal display device having first and second substrates, the method comprising the steps of:

forming a plurality of gate and data bus lines defining pixel regions and arranged on the first substrate;

forming a common line in the pixel region, the common line and the data bus lines having a crossing relationship;

forming a pair of first and second electrodes parallel to each other applying plane electric fields in the pixel regions; and

forming a liquid crystal layer between the first and second substrates;

wherein dΔn is in the range of 0.29-0.36 μm and transmittance is greater than or equal to 60 percent, where d is the thickness of the liquid crystal layer, and Δn is the refractive anisotropy of the liquid crystal molecule;

forming a plurality of thin film transistors adjacent respective cross points of the gate and data bus lines, each of the thin film transistors including a gate electrode, a gate insulator, a semiconductor layer, and source and drain electrodes;

forming a passivation layer on the thin film transistors;

forming a first alignment layer on the passivation layer;

forming a black matrix for preventing light from leaking around the thin film transistors, gate bus line, and data bus lines,

forming a color filter layer on the second substrate; and

forming a second alignment layer on the color filter layer,

wherein the first and second alignment layers comprises polysiloxanecinnamate; and

wherein dΔn is selected to achieve a desired light transmittance and color-shift.

6. The method according to claim 5 , wherein the first electrode includes data electrode and the second electrode includes common electrode.

7. The method according to claim 5 , wherein the passivation layer includes one of SiNx and SiOx.

8. The method according to claim 5 , wherein the common line is substantially perpendicular to the data bus lines.