US 2003/0112393 A1 · LIQUID CRYSTAL DISPLAY DEVICE

Abstract

An IPS (In-Plane Switching) liquid crystal display is disclosed that maintains excellent display uniformity and high aperture ratio as well as high yield during fabrication, and that includes a first transparent substrate, a second transparent substrate arranged to confront the first transparent substrate and provided with a second alignment layer, and a liquid crystal component sealed between the first transparent substrate and second transparent substrate. The first transparent substrate is provided with: a transparent insulating substrate, pixel electrodes and common electrodes that are arranged alternately and substantially parallel to each other on the transparent insulating substrate, a plurality of pixels arranged in matrix form, scan lines and switching elements for controlling the electric field applied to the pixel electrodes, signal lines, and a first alignment layer. The direction of initial orientation of liquid crystal molecules in the aperture regions has an inclination of any angle θ other than 0° and 90° with respect to the longitudinal direction of the pixel electrodes. In regions other than the aperture regions, the direction of initial orientation of the liquid crystal molecules is orthogonal to the longitudinal direction of the pixel electrodes when the dielectric constant anisotropy of the liquid crystal molecules is positive, and parallel to the longitudinal direction of pixel electrodes when the dielectric constant anisotropy is negative.

Claims27

Dependent claims

A liquid crystal display device comprising a first transparent substrate and a second transparent substrate arranged to confront each other, and a liquid crystal component layer sealed between said first transparent substrate and said second transparent substrate;

wherein,
said first transparent substrate is provided with a transparent insulating substrate, pixel electrodes and common electrodes substantially parallel and alternately arranged on said transparent insulating substrate, a plurality of pixels arranged in matrix form, scan lines and switching elements that individually control electric fields applied to pixel electrodes of said pixels, signal lines connected to said switching elements;
common lines that supply a prescribed electric potential to common electrodes of said pixels, and a first alignment layer formed on the highest layer;
and
said second transparent substrate is provided with at least a second alignment layer on the highest layer and
specific alignment processing is carried out such that alignment of said first alignment layer and said second alignment layer differs at regions of said signal lines and their vicinities that is referred to simply as signal line regions and regions of apertures of said pixels and their vicinities that is referred to simply as pixel aperture regions.

3 more elements

wherein,
said first transparent substrate is provided with a transparent insulating substrate, pixel electrodes and common electrodes substantially parallel and alternately arranged on said transparent insulating substrate, a plurality of pixels arranged in matrix form, scan lines and switching elements that individually control electric fields applied to pixel electrodes of said pixels, signal lines connected to said switching elements, common lines that supply a prescribed electric potential to common electrodes of said pixels and a first alignment layer formed on the highest layer;
and
said second transparent substrate is provided with at least a second alignment layer on the highest layer, and a light-shielding layer having aperture regions of said pixels below said alignment layer,
said liquid crystal component has a positive dielectric constant anisotropy,
said first alignment layer and said second alignment layer undergo an alignment process so as to have an inclination of any angle θ which is neither parallel nor orthogonal to the longitudinal direction of said pixel electrode,
said light-shielding layer is formed from a conductor and
voltage is applied to said light-shielding layer such that the director of liquid crystal molecules within said liquid crystal component layer in regions of said signal lines and their vicinities is aligned substantially perpendicular to said first transparent substrate.

5 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device

Life of this patent

Liquid crystal display device

Life of this patent

Abstract

Claims27