LIQUID CRYSTAL DISPLAY DEVICE
A liquid crystal display device is provided. The liquid crystal display device includes a first substrate having a pixel unit, wherein the pixel unit has a pixel electrode. A second substrate is disposed opposite to the first substrate, having an opposite electrode. A first polarizer is disposed under the first substrate. A second polarizer is disposed under the second substrate, wherein a polarization axis of the second polarizer is vertical to that of the first polarizer. A liquid crystal layer with chiral dopants having negative dispersion characteristics is disposed between the first and second substrates.
1 . A liquid crystal display device, comprising:
a first substrate having a pixel unit;
a second substrate disposed opposite to the first substrate, having an opposite electrode;
a first polarizer disposed under the first substrate;
a second polarizer disposed under the second substrate, wherein a polarization axis of the second polarizer is vertical to that of the first polarizer; and
a liquid crystal (LC) layer with chiral dopants having negative dispersion characteristics disposed between the first and second substrates.
2 . The liquid crystal display device as claimed in claim 1 , wherein liquid crystal display device is operated by an incident light having a wavelength between 380 nm and 780 nm.
3 . The liquid crystal display device as claimed in claim 1 , wherein a parameter of LC rotations (d/p ratio) of the LC layer with chiral dopants is between 0.2 and 0.3, wherein d is a thickness of the LC layer with chiral dopants, and P is a pitch of chiral dopants.
4 . The liquid crystal display device as claimed in claim 1 , wherein a first differential of a refractive index (n) of the LC layer with chiral dopants with respect to the wavelength (λ) of an incident light is larger than zero.
5 . The liquid crystal display device as claimed in claim 1 , wherein the first substrate is a thin film transistor (TFT) substrate, and the second substrate is a color filter substrate.
6 . The liquid crystal display device as claimed in claim 1 , wherein the LC layer with chiral dopants is formed by a nematic LC material.
7 . A liquid crystal display device, comprising:
a first substrate having a pixel unit:
a second substrate disposed opposite to the first substrate, having an opposite electrode;
a first polarizer disposed under the first substrate;
a second polarizer disposed under the second substrate, wherein a polarization axis of the second polarizer is vertical to that of the first polarizer; and
a liquid crystal (LC) layer with chiral dopants disposed between the first and second substrates, wherein a first differential of a refractive index (n) of the LC layer with chiral dopants with respect to the wavelength (λ) of an incident light is larger than zero.
8 . The liquid crystal display device as claimed in claim 7 , wherein liquid crystal display device is operated by an incident light having a wavelength between 380 nm and 780 nm.
9 . The liquid crystal display device as claimed in claim 7 , wherein a parameter of LC rotations (d/p ratio) of the LC layer with chiral dopants is between 0.2 and 0.3, wherein d is a thickness of the LC layer with chiral dopants, and p is a pitch of chiral dopants.
10 . The liquid crystal display device as claimed in claim 7 , wherein the liquid crystal (LC) layer with chiral dopants having negative dispersion characteristics.
11 . The liquid crystal display device as claimed in claim 7 , wherein the first substrate is a thin film transistor (TFT) substrate, and the second substrate is a color filter substrate.
12 . The liquid crystal display device as claimed in claim 7 , wherein the LC layer with chiral dopants is formed by a nematic LC material.