Liquid crystal display device and method of fabricating the same

A method of fabricating a liquid crystal display device, comprising:

• forming on a first substrate a common electrode for applying a voltage over an entire surface of the substrate;
• forming on a second substrate a gate bus line and a data bus line arranged in a matrix array, a thin-film transistor located at an intersection of the two bus lines, a pixel electrode connected to the thin-film transistor, and a Cs bus line that forms an electrical capacitance with the pixel electrode;
• forming a liquid crystal layer by filling a liquid crystal composition, containing a photosensitive material, into a gap between the first substrate and the second substrate;
• forming an electrical capacitance using the common electrode and the pixel electrode by sandwiching the liquid crystal layer therebetween;
• insulating the common electrode from the three bus lines, or connecting the common electrode to the three bus lines via high resistance;
• and
• radiating light onto the liquid crystal layer while applying a DC voltage between the common electrode and the pixel electrode by applying a DC voltage between the common electrode and the three bus lines (the gate bus line, the data bus line, and the Cs bus line) formed on the second substrate.

A method of fabricating a liquid crystal display device, comprising:

• forming on a first substrate a common electrode for applying a voltage over an entire surface of the substrate;
• forming on a second substrate a gate bus line and a data bus line arranged in a matrix array, a thin-film transistor located at an intersection of the two bus lines, a pixel electrode connecting to the thin-film transistor, a Cs bus line that forms an electrical capacitance to the pixel electrode, and a repair line intersecting with at least one of the data bus and gate bus lines;
• forming a liquid crystal layer by filling a liquid crystal composition, containing a photosensitive material, into a gap between the first substrate and the second substrate;
• forming an electrical capacitance using the common electrode and the pixel electrode by sandwiching the liquid crystal layer therebetween;
• and
• radiating light onto the liquid crystal layer while applying a DC voltage between the common electrode and the pixel electrode by applying a DC voltage between the common electrode and the four bus lines (the gate bus line, the data bus line, the Cs bus line, and the repair line) formed on the second substrate.

A method of fabricating a liquid crystal display device, comprising:

• forming on a first substrate a common electrode for applying a voltage over an entire surface of the substrate;
• forming on a second substrate a gate bus line and a data bus line arranged in a matrix array, a thin-film transistor located at an intersection of the two bus lines, a pixel electrode connecting to the thin-film transistor, and a Cs bus line that forms an electrical capacitance to the pixel electrode;
• forming a liquid crystal layer by filling a liquid crystal composition, containing a photosensitive material, into a gap between the first substrate and the second substrate;
• forming an electrical capacitance using the common electrode and the pixel electrode by sandwiching the liquid crystal layer therebetween;
• and
• connecting the common electrode via high resistance to the three bus lines (the gate bus line, the data bus line, and the Cs bus line,) formed on the second substrate, and radiating light onto the liquid crystal layer while applying a DC voltage between the common electrode and the pixel electrode by applying a DC voltage between the common electrode and at least one of the bus lines.

A method of fabricating a liquid crystal display device, comprising:

• forming on a first substrate a common electrode for applying a voltage over an entire surface of the substrate;
• forming on a second substrate a gate bus line and a data bus line arranged in a matrix array, a thin-film transistor located at an intersection of the two bus lines, a pixel electrode connecting to the thin-film transistor, and a Cs bus line that forms an electrical capacitance to the pixel electrode;
• forming a CF resin or a light blocking pattern on a channel portion of the thin-film transistor;
• forming a liquid crystal layer by filling a liquid crystal composition, containing a photosensitive material, into a gap between the first substrate and the second substrate;
• forming an electrical capacitance using the common electrode and the pixel electrode by sandwiching the liquid crystal layer therebetween;
• electrically connecting adjacent data bus lines at both ends thereof;
• and
• radiating light onto the liquid crystal layer while applying an AC voltage between the common electrode and the pixel electrode by applying a transistor ON voltage to the gate bus line and an AC voltage between the common electrode and the data bus line.

A method of fabricating a liquid crystal display device, comprising:

• forming on a first substrate a common electrode for applying a voltage over an entire surface of the substrate;
• forming on a second substrate a gate bus line and a data bus line arranged in a matrix array, a thin-film transistor located at an intersection of the two bus lines, a pixel electrode connecting to the thin-film transistor, a Cs bus line that forms an electrical capacitance to the pixel electrode, and a repair line intersecting with the data bus line;
• forming a CF resin or a light blocking pattern on a channel portion of the thin-film transistor;
• forming a liquid crystal layer by filling a liquid crystal composition, containing a photosensitive material, into a gap between the first substrate and the second substrate;
• forming an electrical capacitance using the common electrode and the pixel electrode by sandwiching the liquid crystal layer therebetween;
• connecting at least one data bus line with at least one repair line by laser radiation or another method;
• and
• radiating light onto the liquid crystal layer while applying an AC voltage between the common electrode and the pixel electrode by applying a transistor ON voltage to the gate bus line and an AC voltage between the common electrode and the data bus line and repair line (the repair line is at the same potential as the data bus line).

A method of fabricating a vertical alignment liquid crystal display device, comprising:

• forming a liquid crystal layer by filling a liquid crystal composition into a gap between two substrates each having a transparent electrode and an alignment control film for causing liquid crystal molecules to align vertically, the liquid crystal composition having a negative dielectric anisotropy and containing a polymerizable monomer;
• and
• polymerizing the monomer while applying a voltage between opposing transparent electrodes, and thereby providing a pretilt angle to the liquid crystal molecules, and wherein:
• before polymerizing the monomer, a constant voltage not smaller than a threshold voltage but not greater than a saturation voltage is applied between the opposing transparent electrodes for a predetermined period of time, and thereafter, the voltage is changed to a prescribed voltage and, while maintaining the prescribed voltage, ultraviolet radiation or heat is applied to the liquid crystal composition to polymerize the monomer.

A method of fabricating a liquid crystal display device, comprising:

• forming a liquid crystal layer by filling a liquid crystal composition containing a polymerizable monomer into a gap between two substrates each having a transparent electrode;
• and
• polymerizing the monomer while applying a voltage between opposing transparent electrodes, and thereby providing a pretilt angle to liquid crystal molecules while, at the same time, controlling the direction in which the liquid crystal molecules tilt in the presence of an applied voltage, and wherein:
• light radiation for polymerizing the polymerizable monomer is performed in at least two steps.

A method of fabricating a liquid crystal display device, comprising:

• forming a common electrode and a color filter layer on a first substrate;
• constructing a second substrate from an array substrate on which are formed a gate bus line layer, a gate insulating film layer, a drain bus line layer, a protective film layer, and a pixel electrode layer;
• forming fine slits in the pixel electrode layer in such a direction that a pixel is divided by the slits into at least two sub-regions;
• forming on each of the two substrates a vertical alignment film for vertically aligning liquid crystal molecules;
• forming a liquid crystal layer by filling an n-type liquid crystal composition having a negative dielectric anisotropy into a gap between the two substrates, the liquid crystal composition containing an ultraviolet curable resin having a liquid crystal backbone;
• radiating ultraviolet light while applying to the liquid crystal molecules a voltage not smaller than a threshold value of the liquid crystal molecules, thereby defining the direction in which the liquid crystal molecules tilt in the presence of an applied voltage;
• and
• arranging two polarizers on top and bottom surfaces of the liquid crystal display device in a crossed Nicol configuration with the absorption axes thereof oriented at an angle of 45 degrees to the alignment directions of the liquid crystal molecules.