Liquid crystal display element with conducting layers treated with surface electromagnetic wave
View Patent ↗A liquid crystal display element includes two substrates each covered with a transparent conducting layer and having a liquid crystal layer therebetween, in which the liquid crystal layer is a pure nematic electrooptical matrix or sensitized electrooptical mixture with nanoobjects and in which the conducting layers have been treated with a surface electromagnetic wave. The present invention increases a response speed of the liquid crystal display element due to a decrease of the switching time of electrooptical liquid crystal layer up to 1 ms or less; decreases the number of layers in the liquid crystal display element because an alignment layer is absent, and thus increases the transparency of element; decreases a supply voltage amplitude; and increases a possibility to develop different configurations of the liquid crystal display element.
1. A liquid crystal display element comprising:
two substrates each covered with a transparent conducting layer, the transparent conducting layer having geometric and potential relief on a surface; and
a liquid crystal layer between the two substrates,
wherein the liquid crystal layer is one of a pure nematic electrooptical matrix and sensitized electrooptical mixture with nanostructures, and the transparent conducting layer is treated with a surface electromagnetic wave to generate the relief.
2. The liquid crystal display element of claim 1 , wherein the liquid crystal layer is sensitized with 1 wt. % or less of the nanostructures.
3. The liquid crystal display element of claim 1 , wherein the nanostructures comprise fullerenes C 60 or C 70 , single or multi wall carbon nanotubes or nanoparticles.
4. The liquid crystal display element of claim 1 , wherein a liquid crystal material of the liquid crystal layer has positive optical and dielectric anisotropy, Δn>0 and Δ∈>0, respectively.
5. The liquid crystal display element of claim 1 , wherein a switching time of the electrooptical liquid crystal layer is 1 ms or less.
6. The liquid crystal display element of claim 1 , wherein the surface electromagnetic wave is generated using a pulsed or quasi-continuous CO 2 laser with p- polarized irradiation at a wavelength of about 10.6 micrometers and power of about 30 W.
7. The liquid crystal display element of claim 1 , wherein a thickness of the transparent conducting layer is about 0.05 micrometers or less during treatment thereof by the surface electromagnetic wave.
8. The liquid crystal display element of claim 1 , wherein the thickness of the electrooptical liquid crystal layer is about 10 micrometers to about 12 micrometers.