Abstract: A first substrate, a second substrate opposing to the first substrate, and liquid crystal provided in a space between the first substrate and second substrate are provided to an IPS mode liquid crystal display. A plurality of gate lines and a plurality of drain lines, thin film transistors, pixel electrodes, and common electrodes are formed on a transparent substrate in a first substrate. Each of the thin film transistors is provided in a vicinity of the intersection of the gate line and drain line. Each of the pixel electrodes is formed within a pixel region enclosed with an adjacent pair of the gate lines and an adjacent pair of the drain lines. Each of the common electrodes develops an electric field within each of the pixel regions between the pixel electrode and itself. The second substrate includes color layers provided for each of the pixel regions. The color layers are spaced apart from the gate lines and drain lines when seen on a plane.

Abstract: An active-matrix addressing LCD device using lateral electric field realizes a higher transmittance and a higher fabrication yield and improves the aperture ratio without raising the fabrication cost. A first one of the common electrode lines, a first one of the pixel potential layers, and an intervening dielectric layer constitute a first storage capacitor for each of the pixels and at the same time, a second one of the common electrode lines, a second one of the pixel potential layers, and the intervening dielectric layer constitute a second storage capacitor for the same pixel. The first and second pixel potential layers are electrically connected to each other by way of a corresponding transparent pixel electrode. Therefore, the rotation of the liquid crystal molecules caused by applied electric field makes full contribution to the panel transmittance, preventing the obtainable total panel transmittance from lowering. This means that a higher transmittance is obtainable.

Abstract: An in-plane switching type liquid crystal display device includes (a) a first substrate on which a plurality of gate lines and a plurality of data lines are formed such that the gate lines are substantially perpendicular to the data lines, and on which at least one pixel electrode and at least one common electrode are alternately formed in each of pixels defined by the gate and data lines, (b) a second substrate facing the first substrate, and (c) a liquid crystal layer sandwiched between the first and second substrates, wherein when a voltage is applied across the pixel electrode and the common electrode, liquid crystal existing on extensions of the data lines are caused to rotate in a plane substantially in parallel with the first substrate. Both the pixel electrode and the common electrode have at least one bending point at which the pixel electrode and the common electrode bend, and are designed to bend such that both an intensity and a direction of a field generated by the voltage successively vary.

Abstract: Liquid crystal in an in-plane switching type active matrix liquid crystal display unit has elastic coefficients K11 and K33 which respectively concern a spray deformation and a bent deformation of the liquid crystal layer, wherein one of the elastic coefficients K11 and K33 is fallen within the range between 6 pN and 25 pN or the range between 5 pN and 20 pN; otherwise, the square root of the product between the elastic coefficients K11 and K33 is fallen within the range between 5 pN and 20 pN, thereby improving the luminance through restricting the spray deformation and/or the bent deformation.

Abstract: A color filter substrate is provided with a transparent substrate and color filters of three colors with a bored part provided at every pixel on the transparent substrate. Color filters neighboring to each other in one direction are connected to each other. A thin film transistor is to oppose to the bored part. Data lines are to be aligned along said one direction.

Abstract: A liquid crystal display and a method for manufacturing the liquid crystal display which are capable of an inhibiting occurrence of strong flicker even when only pixels each having a same polarity are displayed on a screen, without causing a decrease in an aperture rate. In the above liquid crystal display, first and second data lines each feeding a pixel voltage being different in polarity to each of first and second pixel electrodes through first and second thin film transistors are formed in such a manner that the first data line is overlaid by the second data line with an insulating film being interposed between the first and second data lines.

Abstract: In an active matrix type liquid crystal display device in which a common electrode and a second pixel electrode have portions opposing each other, and an electric field parallel to substrates is formed between the two electrodes, Y direction extending portions of the common electrode are provided above data lines via a second interlayer insulation film. Slits are opened in the Y direction extending portions of the common electrode along the data lines. Portions of a black matrix which are set to a common electric potential with the common electrode are provided on an opposing substrate at positions opposing the slits.

Abstract: In an in-plane switching (IPS) mode active matrix type liquid crystal display device, data lines 24 supplied with data signals, common electrode wiring portions 26a and 26b applied with a reference voltage, a common electrode 26, pixel electrodes corresponding to pixels to be displayed, scanning lines 28 supplied with scan signals and TFT's 50 are provided on an active element substrate 11. The common electrode wiring portions 26a and 26b are formed by using a first metal layer, extend in parallel to the scanning line and connected to a common electrode potential at a peripheral portion thereof. Protruded portions 299a and 299b are formed in at least one of the common electrode wiring portions 26a and 26b in such a way that the protruded portions are positioned on both sides of the data line 24 to be formed later. Unevenness of display of the display device is reduced and the aperture ratio thereof is improved.

Abstract: In an active matrix liquid crystal display device, a drain and source of a TFT element for controlling power supply to a pixel electrode, are arranged so that an alignment direction of liquid crystal molecules over the source and drain does not change, thereby preventing formation of ghost images in the display. In one embodiment, an electric field generated between the source and drain is parallel to an initial non-zero alignment angle of the molecules.

Abstract: An in-plane switching mode active matrix type liquid crystal display device includes a first substrate, a second substrate located opposing the first substrate, and a liquid crystal layer sandwiched between the first and second substrates. The first substrate includes a thin film transistor, a pixel electrode, a common electrode, a data line, a scanning line, and a common electrode line. The scanning line and the common electrode line are formed in a common layer in parallel with each other. The common electrode overlaps the data line and the scanning line with an interlayer insulating film existing therebetween. The common electrode line is singly formed at either side about the scanning line. The common electrode is electrically connected to the common electrode line through a contact hole formed throughout the interlayer insulating film, and shields a gap formed between the scanning line and the common electrode line.

Abstract: A liquid crystal display apparatus using a thin film transistor, includes first and second substrate sections and a liquid crystal layer provided between the first substrate section and the second substrate section. A supporting spacer extends from the first substrate section. The second substrate section has a concave section. The tip portion of the supporting spacer engages the concave section to keep a gap from the first substrate section.

Abstract: In a liquid crystal display device comprising first and second substrates having first and second principal surfaces which are opposed to each other with a space left therebetween, first and second alignment layers are formed on the first and the second principal surfaces of the first and the second substrates. The first alignment layer is subjected to a first aligning treatment in a first aligning treatment direction while a second alignment layer is subjected to a second aligning treatment in a second aligning treatment direction which shifts from the first aligning treatment direction by a predetermined slight angle. Interposed between the first and the second alignment layers, a liquid crystal layer comprises a plurality of liquid crystal molecules each of which is twist aligned by a twist angle equal to the predetermined slight angle.

Abstract: An in-plane switching type liquid crystal display unit has a matrix of pixels for producing images thereon, and each of the pixels includes a pixel electrode and a thin film transistor connected to the pixel electrode both formed in a first substrate structure, a part of a second substrate structure spaced from the first substrate structure and a piece of liquid crystal filling the gap therebetween, wherein a partition wall is formed for encircling part of said piece of liquid crystal so as to block the piece of liquid crystal from elastic influence of the remaining liquid crystal, thereby improving the response time and the threshold of the pixel.

Abstract: A dissociating substance and its salt are added to a liquid crystal to keep the amount of ions included in the liquid crystal constant under temperature variation and to prevent alignment disorder in the liquid crystal due to static electricity and unevenness or spots due to excessive ion accumulation, leading to improved reliability.

Abstract: An in-plane switching type liquid crystal display unit has an array substrate structure for a matrix of thin film transistors, pixel electrodes connectable through associated thin film transistors to data lines and a common electrode, a counter substrate structure for a black matrix and color filters and liquid crystal filling the gap between the array substrate structure and the counter substrate structure, wherein spacer columns and spacer walls are respectively formed in an image producing area and a frame area, and the spacer walls are formed of anti-eroded material less eroded in acidic washing solution rather than the sealant for a sealing layer for adhering the substrate structures together, thereby preventing the liquid crystal from contaminant due to the acidic washing solution.

Abstract: An in-plane switching mode liquid crystal display device includes a substrate, a scanning line formed on the substrate, a data line formed above the substrate to cross the scanning line while interposing an insulation film between the data line and the scanning line, and a transparent common electrode interconnect line located farther the substrate than the scanning line and the data line and having a width longer than those of the scanning line and the data line, and further, formed to geometrically cover the scanning line and the data line. The construction of the device makes it possible to make all electric fields from the data line and the scanning line terminate on the common electrode interconnect line. Forming the common electrode interconnect line with a transparent conductive material maintains the aperture ratio of the device.

Abstract: An active matrix type of a liquid crystal display apparatus, includes a pair of substrates, a liquid crystal layer and a pixel electrode and a common electrode and a transparent auxiliary electrode. The liquid crystal layer is provided between the pair of substrates. The pixel electrode and the common electrode are provided on at least one side of the pair of substrates. The pixel electrode and the common electrode are provided at established intervals to be shaped like teeth of a comb to generate an electric field substantially parallel to the pair of substrates in the liquid crystal layer. The transparent auxiliary electrode is provided through an insulating film above the common electrode. The same voltage as that of the common electrode is applied to the transparent auxiliary electrode such that the electric field applied to the liquid crystal layer is strengthened.

Abstract: An active-matrix addressing LCD device using lateral electric field realizes a higher transmittance and a higher fabrication yield and improves the aperture ratio without raising the fabrication cost. A first one of the common electrode lines, a first one of the pixel potential layers, and an intervening dielectric layer constitute a first storage capacitor for each of the pixels and at the same time, a second one of the common electrode lines, a second one of the pixel potential layers, and the intervening dielectric layer constitute a second storage capacitor for the same pixel. The first and second pixel potential layers are electrically connected to each other by way of a corresponding transparent pixel electrode. Therefore, the rotation of the liquid crystal molecules caused by applied electric field makes full contribution to the panel transmittance, preventing the obtainable total panel transmittance from lowering. This means that a higher transmittance is obtainable.

Abstract: An active-matrix LCD device drives the LCD panel by using a dot reversible driving technique. The switching between two sets of input signals or two resolution modes is conducted by applying a DC voltage between the pixel electrode and the common electrode in each pixel before restart of the image display of a switched signal. The DC voltage has the same polarity among the pixels in the pixel array to thereby reduce the flicker after the restart of the image display.

Abstract: In an in-plane switching (IPS) mode active matrix type liquid crystal display device, data lines 24 supplied with data signals, common electrode wiring portions 26a and 26b applied with a reference voltage, a common electrode 26, pixel electrodes corresponding to pixels to be displayed, scanning lines 28 supplied with scan signals and TFT's 50 are provided on an active element substrate 11. The common electrode wiring portions 26a and 26b are formed by using a first metal layer, extend in parallel to the scanning line and connected to a common electrode potential at a peripheral portion thereof. Protruded portions 299a and 299b are formed in at least one of the common electrode wiring portions 26a and 26b in such a way that the protruded portions are positioned on both sides of the data line 24 to be formed later. Unevenness of display of the display device is reduced and the aperture ratio thereof is improved.