Embodiments of a dual-sided transparent display panel are presented herein. One embodiment comprises a first layer of electro-optic material, the first layer of electro-optic material including an outer surface and an inner surface; a second layer of electro-optic material, the second layer of electro-optic material including an outer surface and an inner surface; a waveguide disposed between the inner surface of the first layer of electro-optic material and the inner surface of the second layer of electro-optic material; one or more light sources disposed along an edge of the waveguide that is perpendicular to the inner and outer surfaces of the first and second layers of electro-optic material; a first grating coating adjacent to the outer surface of the first layer of electro-optic material; and a second grating coating adjacent to the outer surface of the second layer of electro-optic material.

A method of coating a polyimide film and a method of fabricating a display panel are provided by the embodiments of the present invention. The method of coating a polyimide film includes providing a glass substrate and at least one nozzle; forming a nanomaterial filled graphic letterpress on the glass substrate, wherein the nanomaterial filled graphic letterpress is formed with a plurality of protrusions; and spraying a polyimide liquid on the nanomaterial filled graphic letterpress by the at least one nozzle to form a polyimide film.

A liquid crystal aligning agent composition for preparing a liquid crystal alignment film having enhanced stability and exhibiting excellent electrical characteristics, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.

A polyimide film according to the present invention can be effectively used as a substrate for a flexible display device without a deterioration in heat resistance even at a temperature of 350° C. or higher since a coefficient of thermal expansion (A) in the section of 100-350° C., of the polyimide film, and a coefficient of thermal expansion (B) in the section of 350-450° C., of the polyimide film, meet 0<B/A<2.

A polyimide is provided, which contains at least one repeating unit selected from a group consisting of the following general formulas, M, N, and O:

##STR00001##

X is a residue derived from TCA represented by formula I. Y.sub.1 is a residue derived from a diamine with a cardo structure. Y.sub.2 is a residue derived from a diamine with the structure of a benzene ring, biphenyl, phenylbenzimidazole or phenylbenzoxazole. Y.sub.3 is a residue derived from a diamine with an ether or an ester group.

##STR00002##

A liquid crystal display panel is provided. The liquid crystal display panel includes a first substrate disposed opposite to a second substrate. A color resist layer is disposed between the first substrate and the second substrate. A conductive electrode is disposed on the color resist layer. A via hole penetrating the conductive electrode and in contact with the color resist layer is formed on the conductive electrode. A support column is disposed at a position corresponding to the via hole, and a material for preparing the support column includes a molecular sieve.

An electronic device includes a first substrate, a second substrate disposed opposite to the first substrate, and a third substrate disposed between the first substrate and the second substrate, wherein the third substrate has a first surface closer to the first substrate and a second surface closer to the second substrate. A first alignment layer having a first alignment direction is disposed on a surface of the first substrate. A second alignment layer is disposed on a surface of the second substrate. A third alignment layer having a third alignment direction is disposed on a first surface of the third substrate, and a fourth alignment layer is disposed on the second surface of the third substrate. The third alignment direction is perpendicular to the first alignment direction.

The present invention relates to a liquid crystal alignment composition for the preparation of a liquid crystal alignment film having enhanced alignment property and stability and exhibiting a high voltage holding ratio, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.

According to an aspect, a liquid crystal display device includes: a first light-transmitting substrate; a second light-transmitting substrate disposed so as to be opposed to the first light-transmitting substrate; a liquid crystal layer sealed between the first light-transmitting substrate and the second light-transmitting substrate; alignment films that are provided to the first light-transmitting substrate and the second light-transmitting substrate, respectively, and are in contact with the liquid crystal layer; and at least one light emitter disposed so as to be opposed to at least one of side surfaces of the first light-transmitting substrate and the second light-transmitting substrate. The liquid crystal layer includes a polymer-dispersed liquid crystal comprising a polymer network formed in a mesh shape and liquid crystal molecules held in a dispersed manner in gaps of the polymer network, and each of the alignment films comprises a photocrosslinkable group connected to the polymer network.

A liquid crystal display is provided. The liquid crystal display includes a first substrate. The liquid crystal display also includes a plurality of first thin film transistors disposed on the first substrate. The liquid crystal display further includes a second substrate disposed opposite to the first substrate. In addition, the liquid crystal display includes a plurality of second thin film transistors disposed on the second substrate. The liquid crystal display also includes a plurality of sensing units disposed on the second substrate, and at least one of the plurality of sensing units electrically connected to at least one of the plurality of second thin film transistors. The liquid crystal display further includes a liquid crystal layer disposed between the first substrate and the second substrate.