Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a light-shielding film, a plurality of subpixels on the first substrate, a first electrode for each of the subpixels, a second electrode for each of the subpixels, and a color filter formed on the second substrate for each of the subpixels. The second electrodes each include a plurality of linear portions, wherein the subpixels include first and second subpixels that are adjacent to each other. A signal line forms between the first subpixel and second subpixel, and the color filter is formed across the signal line in the same color, and the second electrodes of the first and second subpixels are formed separately, and the second electrode of the first subpixel is disposed to an area of the second subpixel beyond the signal line.

Abstract: The present invention realizes an IPS liquid crystal display device which exhibits small directivity of viewing angle and high brightness. Below a pixel electrode having a comb-teeth-shaped electrode and having a laterally-extending trapezoidal profile, a planar common electrode not shown in the drawing is formed by way of an insulation film. When a video signal is applied to the pixel electrode, an electric field is generated between the pixel electrode and the common electrode via slit portions formed in the pixel electrode thus controlling liquid crystal molecules. The pixel electrodes are arranged in a packed state by alternately reversing the direction of the trapezoidal shape in the longitudinal direction. Since a light blocking film is not present between two pixel electrodes arranged adjacent to each other in the longitudinal direction, the liquid crystal display device can acquire high transmissivity. As a result, a liquid crystal display device having high brightness can be realized.

Abstract: To improve the reflectivity or the transmissivity significantly, there is provided a liquid crystal display device including a liquid crystal display panel having a pair of substrates and liquid crystal sandwiched between the pair of substrates. The liquid crystal display panel includes a plurality of subpixels each having an active element, a pixel electrode, and a counter electrode, in which an electric field is generated by the pixel electrode and the counter electrode to drive the liquid crystal. The liquid crystal display device includes a light-shielding film and a color filter formed on a first substrate of the pair of substrates, a scanning line for supplying the active element with a scanning voltage, the scanning line being formed on a second substrate of the pair of substrates. The boundary region between the subpixels adjacent along the scanning line has no light-shielding film and no color filter.

Abstract: A liquid crystal display panel is provided with a light-shielding film, and a plurality of subpixels arranged in a matrix. The subpixels each include a first electrode formed on a first substrate, a second electrode formed to be located upper than the first electrode, and a color filter formed on a second substrate. The second electrode has a plurality of linear portions. The subpixels are disposed adjacently along the direction of display lines, and any two of the adjacent subpixels have the same color of color filter. The light-shielding film is formed on the second substrate not to cover the pixel boundary between the two adjacent subpixels but to cover pixel boundaries of the remaining subpixels.

Abstract: The present invention enhances display quality of an IPS-type transflective liquid crystal display device. In the transflective liquid crystal display device including a liquid crystal display panel having a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, the liquid crystal display panel including a plurality of sub pixels each of which has a transmissive portion and a reflective portion, each subpixel out of the plurality of subpixels having a counter electrode formed on one substrate out of the pair of substrates and a pixel electrode formed on one substrate, the counter electrode and the pixel electrode generating an electric field for driving liquid crystal of the liquid crystal layer, the counter electrode and the pixel electrode in the reflective portion are stacked by way of an insulation film, and the counter electrode and the pixel electrode in the transmissive portion face each other in a planer direction.

Abstract: A liquid crystal display of a transflective IPS system in which a lateral electric field is applied to a liquid crystal layer. Polarization films are arranged on the entire surface of a transmissive display unit and a reflective display unit in a manner similar to a transmissive IPS system. An inner retardation layer whose retardation is equal to a half wave is formed in the reflective display unit. A retardation of the liquid crystal layer of the reflective display unit is set to a quarter wave. Thus, a reflective display can be performed in a wide range of environment from a light place to a dark place and a transmissive display of a wide viewing angle and high picture quality can be performed.

Abstract: A liquid crystal display device includes pixels A and pixels B, wherein a width BB of the pixel B is smaller than a width AA of the pixel A. A pixel electrode formed in the pixel B is smaller than a pixel electrode formed in the pixel A in area and hence, capacitance formed between the pixel electrode and a counter electrode which is formed below the pixel electrode with an insulation film sandwiched therebetween becomes small. To eliminate this difference in capacitance, a first branch electrode and a second branch electrode are formed on the pixel electrode of the pixel B thus increasing capacitance between the pixel electrode and the counter electrode. Due to such a constitution, it is possible to prevent the deterioration of image quality attributed to imbalance of capacitance.

Abstract: Each of a plurality of pixels is composed of a first sub-pixel for a first color, a second sub-pixel for a second color, and a third sub-pixel for a third color. The longitudinal direction of the first sub-pixel is the extending direction of video lines, and the longitudinal direction of each of the second sub-pixel and the third sub-pixel is the extending direction of scanning lines. The second sub-pixel and the third sub-pixel are arranged adjacent to each other on one side of the first sub-pixel. The first sub-pixels are continuously formed in two adjacent pixels in the extending direction of the video lines. When three adjacent pixels in the extending direction of the video lines are defined as first to third pixels, the second sub-pixels are continuously formed in the first pixel and the second pixel, and the third sub-pixels are continuously formed in the second pixel and the third pixel.

Abstract: An object of the present invention is to prevent the domain from being generated in the pixel end portions so that the transmittance can increase in an IPS type liquid crystal display device where the size of the pixels is extremely small. In the liquid crystal display device according to the present invention, the electrodes close to the liquid crystal layer have a comb-like structure having a linking portion only at one pixel end, the end portion of the comb-like structure has a structure for preventing the domain from growing, the width of the slits in the comb-like structure is greater than the width of the electrodes, and the alignment of the liquid crystal layer has such a pretilt angle that the liquid crystal rises from the end portion in the comb-like structure towards the root in the interface close to the electrode.

Abstract: A liquid crystal display device having a liquid crystal display panel, which includes a pair of substrates, liquid crystal sandwiched between the substrates, a plurality of sub pixels, each sub pixel including a transmissive portion and a reflective portion, a light blocking film formed on one of the substrates, color filters formed on the one substrate, a leveling film formed on the light blocking film and the color filters, an orientation film formed on the leveling film, a retardation film formed on the orientation film at portions corresponding to the reflective portions of the respective sub pixels, and a protective film formed on the retardation film. The orientation film extends at least from the reflective portion to the transmissive portion, the protective film covers the retardation film and a region of the orientation film, the region of the orientation film is a region where the retardation film is not formed.

Abstract: An IPS-method liquid crystal display device which exhibits small directivity of a viewing angle and high brightness is realized. A planar common electrode is arranged below a pixel electrode which includes comb-teeth-shaped electrodes and slits. When a video signal is applied to the pixel electrode, an electric field is generated between the pixel electrode and the common electrode by way of slit portions formed in the pixel electrode thus controlling liquid crystal molecules. To reduce the occurrence of a phenomenon that an abnormal domain is generated in an end portion of the slit and the abnormal domain lowers transmissivity of liquid crystal, the structure in which the slits having both ends thereof closed and the slits having one-side end portion thereof opened are alternately arranged next to each other in parallel is adopted.

Abstract: The present invention provides a liquid crystal display device including a liquid crystal display panel, wherein the liquid crystal display panel includes a pair of substrates, liquid crystal which is sandwiched between the pair of substrates, a plurality of sub pixels, each sub pixel including a transmissive portion and a reflective portion, a light blocking film which is formed on one substrate out of the pair of substrates, color filters which are formed on one substrate out of the pair of substrates, a leveling film which is formed on the light blocking film and the color filters, an orientation film which is formed on the leveling film, a retardation film which is formed on the orientation film at portions corresponding to the reflective portions of the respective sub pixels, and a protective film which is formed on the orientation film and the retardation film.

Abstract: The present invention realizes an IPS liquid crystal display device which exhibits small directivity of viewing angle and high brightness. Below a pixel electrode having a comb-teeth-shaped electrode and having a laterally-extending trapezoidal profile, a planar common electrode not shown in the drawing is formed by way of an insulation film. When a video signal is applied to the pixel electrode, an electric field is generated between the pixel electrode and the common electrode via slit portions formed in the pixel electrode thus controlling liquid crystal molecules. The pixel electrodes are arranged in a packed state by alternately reversing the direction of the trapezoidal shape in the longitudinal direction. Since a light blocking film is not present between two pixel electrodes arranged adjacent to each other in the longitudinal direction, the liquid crystal display device can acquire high transmissivity. As a result, a liquid crystal display device having high brightness can be realized.

Abstract: A liquid crystal display device comprising electrodes of the one side formed on the pixel regions on the surface of one of the substrates arranged facing each other with the liquid crystals interposed therebetween and on the side of the liquid crystals, and electrodes of the other side formed on at least the pixel regions on the surface of the other substrate on the side of the liquid crystals, wherein each electrode of the one side has a shape of a plurality of circular patterns or patterns close to circles that are arranged in contact with each other, whereby a region where the electrode of the one side is not formed is surrounded by the circular patterns or patterns close to circles of an odd number of three or more, and projections are formed on the surface of the other substrate on the side of the liquid crystals at portions facing nearly the centers of the circular patterns or the patterns close to circles.

Abstract: In a liquid crystal display device into which a phase difference film is incorporated on the color filter substrate side, the phase difference film can be formed more easily than the prior art.

Abstract: A liquid crystal display device comprising a liquid crystal display panel that has a first substrate (SUB1), a second substrate (SUB2) disposed so as to oppose the first substrate (SUB1), and a liquid crystal layer (LC) sandwiched between the first substrate (SUB1) and the second substrate (SUB2); wherein the first substrate (SUB1) has a reflective electrode (RAL) having a surface formed in an irregular shape; an organic insulation film (18) formed in a layer above the reflective electrode (RAL); a transparent electrode (19) formed in a layer above the organic insulation film (18); an inorganic insulation film (20) formed in a layer above the transparent electrode (19); and a pixel electrode (PIX) formed in a layer above the inorganic insulation film (20).

Abstract: A liquid crystal display panel is provided with a light-shielding film, and a plurality of subpixels arranged in a matrix. The subpixels each include a first electrode formed on a first substrate, a second electrode formed to be located upper than the first electrode, and a color filter formed on a second substrate. The second electrode has a plurality of linear portions. The subpixels are disposed adjacently along the direction of display lines, and any two of the adjacent subpixels have the same color of color filter. The light-shielding film is formed on the second substrate not to cover the pixel boundary between the two adjacent subpixels but to cover pixel boundaries of the remaining subpixels.

Abstract: A liquid crystal display apparatus includes a transmissive display portion having the same liquid crystal alignment directions and transmissive axes of the polarizers as the transmissive IPS liquid crystal display apparatus. Further, the liquid crystal layer of its reflective display portion has a retardation of a quarter wave. The liquid crystal alignment directions of the reflective display portion are set to be crossed with the transmissive axes of the polarizers in the transmissive display portion at an angle of 45 degrees.

Abstract: The present invention enhances a numerical aperture of a liquid crystal display device having color filters. In a liquid crystal display device including a liquid crystal display panel which has a first substrate, a second substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal display panel includes a light blocking film and a plurality of sub pixels arranged in a matrix array, each one of the plurality of sub pixels includes a pixel electrode, a counter electrode and a color filter, an electric field is generated between the pixel electrode and the counter electrode thus driving liquid crystal of the liquid crystal layer. The plurality of sub pixels includes two neighboring sub pixels which are arranged adjacent to each other along the direction of a display line and have the color filters of the same color.

Abstract: A liquid crystal display device includes a first substrate and a second substrate with a liquid crystal material sandwiched therebetween, a pixel having an optically transmissive portion and an optically reflective portion, a phase plate which is formed between the second substrate and the liquid crystal material in the optically transmissive portion of the pixel, and a color filter which is formed between the second substrate and the liquid crystal material in the optically transmissive portion of the pixel and between the phase plate and the liquid crystal material in the optically reflective portion of the pixel. A counter electrode is formed between the color filter and the liquid crystal material, and a pixel electrode is formed between the first substrate and the liquid crystal material. An electric field which is produced by a voltage between the pixel electrode and the counter electrode induces behavior of the liquid crystal material.