Active matrix liquid crystal display having interdigitated pixel and first counter electrodes in the same plane and a second counter connected to the first counter electrode via a contact hole in a insulating layer
A liquid crystal display. The display has a substrate and a first counter electrode formed on the substrate. The first counter electrode extends in a first direction. An insulating layer having a contact opening is formed on the substrate, which has the first counter electrode. A pixel electrode is formed on the insulating layer and has a body separated from the first counter electrode by a selected distance. The pixel electrode also has a plurality of comb-teeth, which extends parallel to the first counter electrode from the body of the pixel electrode. The body extends in a second direction substantially perpendicular to the first direction. A second counter electrode is formed on the insulating layer. The second electrode also has a body extending parallel to the body of the pixel electrode. The pixel electrode has a plurality of comb-teeth extending from the body of the second counter electrode in the first direction. The body of the second counter electrode overlaps the first counter electrode at one end thereof. The plurality of comb-teeth of the second counter electrode interdigitate with the plurality of the pixel electrode by a predetermined distance.
High screen quality In Plane-Fringe Field Switching mode Liquid Crystal Device ("LCD") having plural gate bus and data bus line cross-arranged on a transparent substrate; common bus lines parallel with the gate bus line; thin film transistor at the intersection of the gate bus and the data bus lines; counter electrode, including a first body parallel with the data bus lines and a plurality of first branches, the end of one side being in contact with the first body, the first branches having a predetermined angle symmetric with the common bus line; and pixel electrode, including a second body parallel with the data bus line and plural second branches, the other end being in contact with the second body and the one end being extended to the upper part of the first branches, the second branches being on the same layer with the first branches, extending parallel between the first branches.
An IPS mode TFT-LCD and method for fabricating the same are disclosed. The IPS mode TFT-LCD includes a gate electrode interconnection; a pixel electrode formed on the same layer with the gate electrode interconnection; a first common electrode formed on the same layer with the gate electrode interconnection; a gate insulating layer formed on a substrate and covering each electrode; a data electrode formed on the upper of the gate insulating layer perpendicularly to the first common electrode; and a second common electrode which is formed on the same layer with the data electrode, parallel thereto and simultaneously in contact with the pixel electrode and the first common electrode.
An active matrix substrate includes: a plurality of scan lines and signal lines on a transparent insulative substrate which cross each other; a plurality of switching elements formed at predetermined intersections of the scan lines and signal lines, the switching elements being electrically connected to the scan lines and signal lines; a connection electrode electrically connected to a corresponding one of the switching elements; an interlayer insulating film formed over the scan lines, the signal lines, the connection electrode, and the switching elements; a contact hole formed in the interlayer insulating film over the connection electrode; and a pixel electrode at each intersection, the pixel electrode being electrically connected to the connection electrode through the contact hole, wherein each of the scan lines and signal lines includes an opaque electrode layer; and the contact hole is formed such that a portion of the contact hole exists outside the connection electrode.
There is provided a liquid crystal display including (a) a first substrate, (b) a second substrate spaced away from and facing the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a first electrode formed on the first substrate at a surface facing the liquid crystal layer, (e) a second electrode formed on the first substrate at a surface facing the liquid crystal layer, and cooperating with the first electrode to form a pixel, the first and second electrodes generating an electric field therebetween to thereby implement in-plane switching, and (f) an interlayer insulating film formed at least below the second electrode, but not formed at least below the first electrode, a dielectric layer formed between at least a part of an upper surface of the first electrode and the liquid crystal layer being designed to have a capacitance per a unit area, almost equal to a capacitance per a unit area of a dielectric layer formed between at least a part of an upper surface and the liquid crystal layer. In the abovementioned liquid crystal display, since a dielectric distance between the first electrode and the liquid crystal layer is almost equal to a dielectric distance between the second electrode and the liquid crystal layer, it is possible to balance flexo-electric effects on the first and second electrodes, which ensures suppression in generation of after-images.
There is provided a liquid crystal display including (a) a first substrate, (b) a second substrate spaced away from and facing the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a first electrode formed on the first substrate at a surface facing the liquid crystal layer, (e) a second electrode formed on the first substrate at a surface facing the liquid crystal layer, and cooperating with the first electrode to form a pixel, the first and second electrodes generating an electric field therebetween to thereby implement in-plane switching, and (f) an interlayer insulating film formed at least below the second electrode, but not formed at least below the first electrode, a dielectric layer formed between at least a part of an upper surface of the first electrode and the liquid crystal layer being designed to have a capacitance per a unit area, almost equal to a capacitance per a unit area of a dielectric layer formed between at least a part of an upper surface and the liquid crystal layer. In the above-mentioned liquid crystal display, since a dielectric distance between the first electrode and the liquid crystal layer is almost equal to a dielectric distance between the second electrode and the liquid crystal layer, it is possible to balance flexo-electric effects on the first and second electrodes, which ensures suppression in generation of after-images.