The present invention provides a liquid crystal display device in a new display mode that is based on the horizontal alignment capable of giving a wide viewing angle and that can achieve high speed response. The liquid crystal display device includes: a first substrate that includes a pair of electrodes; a second substrate that includes a pixel electrode and a common electrode; and a liquid crystal layer that contains liquid crystal molecules aligned horizontally, at least one of the pair of electrodes including a first linear portion that extends in a first direction, at least one of the pixel electrode and the common electrode including a second linear portion that extends in a second direction intersecting the first direction, the liquid crystal molecules being aligned in a direction perpendicular or parallel to the first direction in a first display state in which voltage is applied between the pair of electrodes but voltage is not applied between the pixel electrode and the common electrode, the liquid crystal molecules being aligned in a direction different from the alignment direction of the first display state, in a second display state in which voltage is applied between the pair of electrodes and voltage is applied between the pixel electrode and the common electrode.

An exemplary embodiment of the present invention provides a liquid crystal display, including: a first substrate including a first pixel electrode, the first pixel electrode having a planar shape; a second substrate disposed facing the first substrate, including a common electrode disposed on the second substrate; a liquid crystal layer including a plurality of liquid crystal molecules disposed between the first substrate and the second substrate; and a plurality of pixels disposed between the first substrate and the second substrate, each of the plurality of pixels including a plurality of domains, and liquid crystal molecules of the liquid crystal layer disposed in different domains have different pretilt directions.

The present, invention provides a liquid crystal display device that can exhibit excellent retardation stability against heat and that can prevent reduction in contrast ratio due to scattering even when the liquid crystal display device includes a retardation layer formed by polymerization of a reactive monomer, and a method for producing a liquid crystal display device suitable for production of the liquid crystal display device. The liquid crystal display device of the present invention includes paired substrates and a liquid crystal layer provided between the paired substrates. At least one of the paired substrates includes a retardation layer formed from a polymer of at least one type of monomer. The at least one type of monomer includes a photo-aligning monomer that is to be aligned by polarized light.

A liquid crystal display including a first substrate; a second substrate on the first substrate; a liquid crystal layer between the first substrate and the second substrate; a first alignment layer between the first substrate and the liquid crystal layer and including a first polymer; a second alignment layer between the second substrate and the liquid crystal layer and including a second polymer; and protrusions between the first alignment layer and the liquid crystal layer, wherein at least one of the protrusions includes an alignment polymer polymerized with a reactive mesogen, the first polymer includes a first main chain and a plurality of first side chains connected to the first main chain, and at least one of the plurality of first side chains includes a photoreactive group and a photoreactive derivative, and wherein the photoreactive group has an absorbance that is greater than that of the reactive mesogen.

A liquid crystal display panel includes a first substrate, a second substrate, a first alignment layer, a second alignment layer and a liquid crystal layer. The second substrate faces the first substrate. The liquid crystal layer is disposed between the first alignment layer and the second alignment layer. The first alignment layer and the second alignment layer each include a polyimide compound polymerized by cyclobutane-1,2,3,4-tetracarboxylic dianhydride and cyclobutane-1,2,3,4-tetracarboxylic dianhydride derivative.

A manufacturing method of a liquid crystal display includes: forming a first alignment layer on a passivation layer and a pixel electrode to form a first display panel; forming a second alignment layer on a common electrode to form a second display panel; and combining the first and the second display panels, wherein formation of the first and second alignment layers includes spraying a first alignment mixture and second alignment mixture on, respectively, the first and second display panels using an inkjet head while moving the inkjet head across the first and second display panels to form a first alignment mixture layer and a second alignment mixture layer, and hardening the first and second alignment mixture layers, and spray progressing directions of the first and second alignment mixture are more than 7 degrees to less than 45 degrees with respect to the first substrate and the second substrate respectively.

The present invention relates to a liquid crystal alignment agent composition including a copolymer for liquid crystal alignment agent containing two types of repeating units classified according to the types of diamine-derived functional groups, and a crosslinker compound in which the protecting group having a specific structure was introduced, 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.

The present invention provides a liquid crystal display device in which display unevenness is suppressed by preventing degradation of TFT characteristics due to photo-alignment treatment. A liquid crystal display device of the present invention includes: a thin film transistor substrate; and a liquid crystal layer. The thin film transistor substrate includes a thin film transistor having an etching stopper structure, an alignment film, and a pair of electrodes for applying an electric field to the liquid crystal layer. The thin film transistor includes a gate electrode, a gate insulating film, a channel layer containing an oxide semiconductor, an etching stopper layer, and a pair of a source electrode and a drain electrode in the stated order. The alignment film includes a photofunctional group. The liquid crystal layer has negative dielectric anisotropy.

The present invention relates to novel photoactive polymer materials and their use as orienting layer for liquid crystals, which are used for the production of non-structured and structured optical elements or electro-optical elements and multi-layer systems.

The present application relates to a liquid crystal aligning agent, a liquid crystal alignment film and a method for producing the same, as well as a liquid crystal display device. The liquid crystal aligning agent comprises (i) a first polyamic acid having a photoreactive group without a liquid crystal group; (ii) a second polyamic acid having a liquid crystal group without a photoreactive group; (iii) a third polyamic acid having both a liquid crystal group and a photoreactive group; (iv) a fourth polyamic acid having neither a photoreactive group nor a liquid crystal group. The liquid crystal display device using the liquid crystal alignment film formed by the liquid crystal aligning agent provided by the present disclosure has a high display contrast and an improved AC residual image.