Liquid crystal display device and thin film transistor substrate

A thin film transistor substrate comprising:

• a storage capacitance forming electrode formed on a first substrate;
• an active element formed on the first substrate;
• and
• a pixel electrode formed on the first substrate to be connected to the active element, and divided into at least three areas by slits;
• wherein electrical connection of one area of the three areas of the pixel electrode to another area has a plurality of routes passing through different areas.

A liquid crystal display device in which liquid crystal having negative dielectric anisotropy is sealed between a first substrate and a second substrate, to surfaces of which a vertical alignment process is applied, and alignment of the liquid crystal molecules becomes substantially perpendicular when no voltage is applied, substantially parallel when a predetermined voltage is applied, and oblique when a voltage smaller than the predetermined voltage is applied, comprising:

• a first domain defining means formed of dielectric projections provided on the first substrate, for defining an oblique alignment direction of the liquid crystal molecules when the voltage smaller than the predetermined voltage is applied;
• a second domain defining means provided on the second substrate, for defining the oblique alignment direction of the liquid crystal molecules when the voltage smaller than the predetermined voltage is applied;
• a plurality of first bus lines formed on the first substrate or the second substrate;
• a plurality of second bus lines formed over the first bus lines at a distance;
• a pixel electrode formed in areas that are partitioned by the first bus lines and the second bus lines;
• and
• dielectric structures formed on at least one of the first substrate and the second substrate in areas to oppose to at least a part of areas between the pixel electrode and the first bus lines, the dielectric structures being different from the projections.

A liquid crystal display device comprising:

• a first substrate and a second substrate arranged in parallel with each other at a distance;
• a liquid crystal layer formed by filling liquid crystal material having negative dielectric anisotropy between the first substrate and the second substrate;
• a first electrode and a second electrode formed on opposing surfaces of the first substrate and the second substrate respectively to define a pixel by at least one of them;
• projections formed on the opposing surface of the first electrode;
• a domain defining means formed on the opposing surface of the second electrode, for defining boundary positions of domains in which tilt directions of liquid crystal molecules are uniform together with the projections;
• an alignment film formed on at least one of the first substrate and the second substrate and having an alignment defining force to align the liquid crystal molecules on a surface of the alignment film perpendicularly to a film surface;
• and
• a compensating means arranged along edges of the projections when viewed along a normal direction of the first substrate, for reducing a double refraction effect acting on a light, that transmits in a thickness direction of the liquid crystal layer, due to oblique alignment of the liquid crystal molecules of the liquid crystal layer in a neighborhood of the edges of the projections.

A liquid crystal display device comprising:

• a first substrate and a second substrate arranged in parallel with each other at a distance;
• a liquid crystal layer formed by filling liquid crystal material having negative dielectric anisotropy between the first substrate and the second substrate;
• a first electrode and a second electrode formed on opposing surfaces of the first substrate and the second substrate respectively to define a pixel by at least one of them;
• an alignment film formed on at least one of the first substrate and the second substrate and having an alignment defining force to align the liquid crystal molecules of the liquid crystal layer perpendicularly to the film surface;
• projections formed on the opposing surface of the first electrode;
• a first domain defining means provided on the opposing surface of the first electrode and having a pattern elongated along one direction in at least a local area within a substrate surface, and for tilting the liquid crystal molecules in a neighborhood of an edge of the first domain defining means to such a direction that end portions positioned far from the first electrode go away from the first domain defining means when a voltage is applied between the first electrode and the second electrode;
• and
• a second domain defining means provided on the opposing surface of the second electrode and arranged in parallel with or to be overlapped with the first domain defining means in at least a local area within the substrate surface when viewed along a normal direction of the substrate, and for tilting the liquid crystal molecules on an inside of the second domain defining means to a direction that is substantially parallel with a length direction of the second domain defining means.

A liquid crystal display device comprising:

• a first substrate and a second substrate arranged in parallel with each other at a distance;
• a liquid crystal layer formed by filling liquid crystal material having negative dielectric anisotropy between the first substrate and the second substrate;
• a first electrode and a second electrode formed on opposing surfaces of the first electrode and the second electrode respectively to define a pixel by at least one of them;
• and
• an alignment film formed on at least one of opposing surfaces of the first substrate and the second substrate, and defined into first areas containing at least two parallel patterns elongated in one direction and a second area between the first areas, the second area having an alignment defining force to align liquid crystal molecules of the liquid crystal layer perpendicularly to the substrate surface and the first areas having no alignment defining force or a weaker alignment defining force than the alignment defining force in the second area.

A liquid crystal display device comprising:

• a first substrate and a second substrate arranged in parallel with each other at a distance;
• a liquid crystal layer formed by filling liquid crystal material having negative dielectric anisotropy between the first substrate and the second substrate;
• a first electrode and a second electrode formed on opposing surfaces of the first electrode and the second electrode respectively to define a pixel by at least one of them;
• and
• an alignment film formed on at least one of opposing surfaces of the first substrate and the second substrate, and defined into first areas extended from respective corners of the pixel to an inside of the pixel to have patterns connected mutually and a second area partitioned by the first areas and edges of the pixel, the second area having an alignment defining force to align liquid crystal molecules of the liquid crystal layer perpendicularly to the substrate surface and the first areas having no alignment defining force or a weaker alignment defining force than the alignment defining force in the second area.

A liquid crystal display device comprising:

• a first substrate on which a first electrode and bus lines for transmitting a signal to the first electrode are formed;
• a second substrate on which a second electrode is formed;
• domain defining projections provided on one of the first substrate and the second substrate;
• a plurality of domain defining slits provided on an electrode on the other of the first substrate and the second substrate to be aligned on a straight line;
• a first alignment film for covering the first electrode;
• a second alignment film for covering the second electrode;
• and
• liquid crystal sealed between the first substrate and the second substrate and having negative dielectric anisotropy;
• wherein a pre-tilt angle revealing process is applied to the alignment film on the other substrate in an area in which alignment of liquid crystal molecules becomes unstable by a lateral electric field from the bus line.

A liquid crystal display device comprising:

• a first substrate on which a first electrode and a bus line for transmitting a signal to the first electrode are formed;
• a second substrate on which a second electrode is formed;
• domain defining projections provided on one of the first substrate and the second substrate;
• a plurality of domain defining slits provided on the electrode on the other of the first substrate and the second substrate to be aligned on a straight line;
• and
• liquid crystal sealed between the first substrate and the second substrate and having negative dielectric anisotropy;
• wherein a width of a bus line opposite side end of a first slit of the plurality of slits, that is positioned closest to the bus line, is set smaller than a width of a bus line side end of a second slit positioned adjacent to the first slit.

A liquid crystal display device comprising:

• a first substrate on which a first electrode and a bus line for transmitting a signal to the first electrode are formed;
• a second substrate on which a second electrode is formed;
• domain defining projections provided on one of the first substrate and the second substrate;
• a plurality of domain defining slits provided on the electrode on the other of the first substrate and the second substrate to be aligned on a straight line;
• a first alignment film for covering the first electrode;
• a second alignment film for covering the second electrode;
• and
• liquid crystal sealed between the first substrate and the second substrate and having negative dielectric anisotropy;
• wherein a pre-tilt angle revealing process is applied to the alignment film on the other substrate in an area in which alignment of liquid crystal molecules becomes unstable by a lateral electric field from the bus line, and a width of a bus line opposite side end of a first slit of the plurality of slits, that is positioned closest to the bus line, is set smaller than a width of a bus line side end of a second slit positioned adjacent to the first slit.