Abstract: There is provided a TFT liquid crystal display device in which the adhesion strength of a sealing material is high and the reliability of its terminals is high. In a peripheral area of the liquid crystal display device, an organic protective film underlying the area of the sealing material is collectively removed together with an inorganic protective film, and video signals are respectively led from drain lines of a display area in such a manner that the respective drain lines are temporarily connected to gate lines underlying an insulating film under the sealing material.

Abstract: A pair of electrodes which constitute an upper layer and a lower layer with respect to an interlayer insulation film are formed as different layers at respective pixel regions on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal. At two pixel regions which are selected from the respective pixel regions, the height of background layers on which the electrodes which constitute the lower layers with respect to the interlayer insulation films are formed differs with respect to a surface of one substrate. The film thickness of the interlayer insulation film is set small with respect to the high background layer out of respective background layers which differ in height and is set large with respect to the low background layer out of respective background layers which differ in height.

Abstract: In a liquid crystal display device, a capacitance element uses a semiconductor layer as one electrode and is formed between the semiconductor layer and a storage capacitance line with an insulating film interposed therebetween, and a voltage which constantly brings a MOS type transistor into an ON state is applied to the storage capacitance line.

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 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: In a liquid crystal display device of the active matrix type using in-plane switching (IPS), with at least four transmission regions being formed within a single pixel area surrounded by neighboring gate wiring lines and neighboring drain wiring lines disposed in a direction transverse to the drain wiring lines, a multilayer structure formed of two layers of conductive films with an insulating film sandwiched therebetween is provided at a pixel electrode extending from either one of the neighboring gate wiring lines toward the interior of the pixel and causes one of these two-layer conductive films (i.e.

Abstract: A flexible display device includes: a flexible substrate which constitutes at least part of an envelope of the flexible display device; a plurality of pixels disposed on the flexible substrate; a group of terminals which is formed at a first portion on one surface of the flexible substrate and supplies signals to the plurality of pixels; and a reinforcing member attached to at least a second portion on another surface of the flexible substrate which faces the first portion across a thickness of the flexible substrate.

Abstract: In a liquid crystal display device, a capacitance element uses a semiconductor layer as one electrode and is formed between the semiconductor layer and a storage capacitance line with an insulating film interposed therebetween, and a voltage which constantly brings a MOS type transistor into an ON state is applied to the storage capacitance line.

Abstract: The present invention provides a liquid crystal display device which can sufficiently reduce coloring even in an intermediate gray scale display, not to mention, coloring in a white display state. Pixel regions are formed between respective substrates with liquid crystal filled therebetween, a projection pattern or a groove pattern which divides each pixel region into a plurality of domains is formed parallel to liquid-crystal-side surfaces of the respective substrates, and the inclination of the projection pattern or the groove pattern differs among red pixels, green pixels and blue pixels.

Abstract: There is provided a TFT liquid crystal display device in which the adhesion strength of a sealing material is high and the reliability of its terminals is high. In a peripheral area of the liquid crystal display device, an organic protective film underlying the area of the sealing material is collectively removed together with an inorganic protective film, and video signals are respectively led from drain lines of a display area in such a manner that the respective drain lines are temporarily connected to gate lines underlying an insulating film under the sealing material.

Abstract: A liquid crystal display device includes a liquid crystal display panel having respective pixels which are allocated to red, green and blue and a light source which allows light to pass through the respective pixels, wherein the light source is constituted of a plurality of red light emitting elements, a plurality of green light emitting elements and a plurality of blue light emitting elements. The liquid crystal display device further includes pixels which have the largest light transmitting quantity out of the respective pixels allocated to red, green and blue, and the number of light emitting elements of color corresponding to color which is allocated to the pixels having the largest light transmitting quantity is smaller than the number of light emitting elements of other color.

Abstract: In a TFT type liquid crystal display device comprising first and second transparent substrates and a liquid crystal layer which is sandwiched between the first and second substrates, the first substrate includes a plurality of video signal lines, a plurality of scanning signal lines and a plurality of pixel regions which are formed as regions surrounded by the video signal lines and the scanning signal lines, each pixel region includes at least one active element, one pixel electrode and one common electrode, and color filter layers are formed between the pixel electrodes and the liquid crystal layer. The liquid crystal display device is substantially characterized in that the common electrodes are formed as layers above the color filters, the pixel electrodes are formed as layers below the color filters, and the color filters are superposed at least on the whole surfaces of the pixel electrodes in the pixel region.

Abstract: A display device in which contact holes each having a sidewall with an ideal tapered shape are formed in a structure in which a silicon oxide film, a silicon nitride film and a silicon oxide film are stacked in named order. The display device includes a first silicon oxide film, a silicon nitride film stacked on the first silicon oxide film, a second silicon oxide film stacked on the silicon nitride film, and a contact hole extended through at least three layers which include the first silicon oxide film, the silicon nitride film and the second silicon oxide film. In the display device, letting d2 and d3 denote, respectively, a film thickness of the silicon nitride film and a film thickness of the second silicon oxide film, these films are stacked to satisfy d2<d3 and the contact hole is formed to have a tapered shape free of constrictions.

Abstract: There is provided a TFT liquid crystal display device in which the adhesion strength of a sealing material is high and the reliability of its terminals is high. In a peripheral area of the liquid crystal display device, an organic protective film underlying the area of the sealing material is collectively removed together with an inorganic protective film, and video signals are respectively led from drain lines of a display area in such a manner that the respective drain lines are temporarily connected to gate lines underlying an insulating film under the sealing material.

Abstract: A pair of electrodes which constitute an upper layer and a lower layer with respect to an interlayer insulation film are formed as different layers at respective pixel regions on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal. At two pixel regions which are selected from the respective pixel regions, the height of background layers on which the electrodes which constitute the lower layers with respect to the interlayer insulation films are formed differs with respect to a surface of one substrate. The film thickness of the interlayer insulation film is set small with respect to the high background layer out of respective background layers which differ in height and is set large with respect to the low background layer out of respective background layers which differ in height.

Abstract: In a TFT type liquid crystal display device comprising first and second transparent substrates and a liquid crystal layer which is sandwiched between the first and second substrates, the first substrate includes a plurality of video signal lines, a plurality of scanning signal lines and a plurality of pixel regions which are formed as regions surrounded by the video signal lines and the scanning signal lines, each pixel region includes at least one active element, one pixel electrode and one common electrode, and color filter layers are formed between the pixel electrodes and the liquid crystal layer. The liquid crystal display device is substantially characterized in that the common electrodes are formed as layers above the color filters, the pixel electrodes are formed as layers below the color filters, and the color filters are superposed at least on the whole surfaces of the pixel electrodes in the pixel region.

Abstract: An active matrix type liquid crystal display device includes, in each pixel, a semiconductor layer of a thin film transistor, a first insulating film formed on the semiconductor layer, a gate line formed on the first insulating film, a second insulating film formed on the gate line, and a drain line formed on the second insulating film. The bottom side of the gate line is opposed to the semiconductor layer with the first insulating film interposed therebetween, and the top side of the gate line is covered with a metal electrode formed on the second insulating film by the same process as used to form the drain line, whereby leakage electric fields from the gate line are shielded. Particularly when an IPS type liquid crystal display device using low temperature poly silicon TFTs is constructed in the above-described manner, a wide viewing angle and a bright display image are obtained.

Abstract: The present invention provides a display device which includes signal lines which are formed on an upper surface side of a substrate, an insulation film which is formed such that the film covers the signal lines except for terminal portions of the signal lines, and conductive layers which extend in the extension direction of the signal lines such that the terminal portions traverse the terminal portions. In such a display device, gaps are formed between respective sides of the conductive layer parallel to the extension direction of the conductive layer and the insulation film and holes are formed in the signal lines at portions corresponding to the gaps along the extension direction of the signal lines.

Abstract: Below a transparent pixel electrode, an opaque pixel electrode is arranged while sandwiching an insulation film between the transparent pixel electrode and the opaque pixel electrode. A common electrode is arranged below the opaque pixel electrode thus forming a holding capacitance between the common electrode and an opaque metal electrode. In case when the pixel is divided into four or more portions, an interval between the pixel electrode and the common electrode is set to an unequal pitch size or an unequal electrode width within one pixel.

Abstract: To improve optical transmission efficiency without reducing optical reflection efficiency.