Abstract: A liquid crystal display device in which electrolytic corrosion is prevented from occurring at the intersections of gate lines and drain lines or in a lead terminal portion over an active matrix substrate. In the liquid crystal display device, each interconnection of a gate line and a drain line over the active matrix substrate is formed to have the gate line, a gate insulating layer, a semiconductor layer, a contact layer, the drain line and a passivation layer all stacked in that order from the active matrix substrate, and a capping layer, which is made of the same ITO layer as a pixel electrode layer, is formed over the passivation layer at the intersection of the gate line and the drain line over the active matrix substrate.

Abstract: A liquid crystal display device in which the time necessary for luminance to change from application of a different gray-scale voltage exceeds one frame period in relation to the response as a luminance change time of the liquid crystal. The liquid crystal display device includes a signal control circuit for preventing the content of a preceding frame from being displayed as an after-image and preventing also deterioration of image quality. The signal control circuit includes a frame memory for delaying by one frame the first display data inputted from the external device, an arithmetic operation circuit for comparing the second display data stored in the frame memory and delayed by one frame with the first display data, and an addition/subtraction circuit for adding and subtracting correction data outputted by the arithmetic operation circuit to and from the first display data.

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: The present invention provides a liquid crystal display device which can simplify patterning steps of signal wirings and electrodes during manufacture and can enhance the reliability by preventing the electrolytic corrosion of terminal portions or the like. At the time of forming electrodes and/or signal wirings on a substrate 1, an amorphous oxide conductive film 3 having a large etching rate is laminated onto a metal film 2 which is made of chromium or the like and is formed on the substrate 1, and these films arc etched simultaneously in only one photolithography treatment.

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: 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: A liquid crystal display device in which the time necessary for luminance to change from application of a different gray-scale voltage exceeds one frame period in relation to the response as a luminance change time of the liquid crystal. The liquid crystal display device includes a signal control circuit for preventing the content of a preceding frame from being displayed as an after-image and preventing also deterioration of image quality. The signal control circuit includes a frame memory for delaying by one frame the first display data inputted from the external device, an arithmetic operation circuit for comparing the second display data stored in the frame memory and delayed by one frame with the first display data, and an addition/subtraction circuit for adding and subtracting correction data outputted by the arithmetic operation circuit to and from the first display data.

Abstract: In a liquid crystal display device having a repair line for replacing a signal line disconnected in a display area thereof and extended from one side thereof to another side thereof opposite to the one side thereof, there is provided a signal amplifier on a circuit board arranged at the one side thereof. Since the circuit board supplies control signals to a signal driver circuit which outputs a video signal or the like to be transferred by the repair line toward another side of the liquid crystal display device, the video signal can be amplified by the signal amplifier before its waveform is deformed on its way through the repair line. Therefore, the video signal can be supplied to a part of the disconnected signal line at the another side of the liquid crystal display device by preventing the video signal from being deformed and delayed.

Abstract: An active matrix type liquid crystal display device having first and second substrates with a liquid crystal layer between the first and second substrate. A plurality of drain lines and gate lines are formed on the first substrate and cross each other in a matrix form. A plurality of pixels are formed by adjoining the drain lines and the gate lines. At least a signal line is formed with at least two contact holes over the signal line in each pixel, and the two contact holes is arranged to connect between different electrodes.

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: An active matrix type display device having first and second substrates, and a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form. A plurality of pixels are formed by adjoining the drain lines and the gate lines. A gate terminal is connected to the gate line formed on the first substrate, and a drain terminal is connected to the drain line formed on the first substrate. At least a pixel electrode is formed on the first substrate in each pixel, at least a counter electrode is formed on the first substrate in each pixel, and the gate terminal and the drain terminal are formed by the same layer of the counter electrode.

Abstract: A liquid crystal display unit in which a voltage is applied to a pixel electrode and a common signal electrode constituted by two upper and lower transparent conductive layers having insulation layers disposed therebetween so that a liquid crystal is driven to control display can improve any one or both of reduction of a writing time of the liquid crystal (reduction of a capacitance between the pixel electrode and the common signal electrode) and reduction of a driving voltage of the liquid crystal. An inter-layer insulation layer between the transparent electrodes formed of different layers is constituted by at least one or a laminated structure of a part of a gate insulation layer, a part of a surface protection layer of a thin film transistor and an applied-type insulation layer and insulation layers in an area which is positioned above the lower transparent electrode.

Abstract: A liquid crystal display apparatus includes a circuit for generating an alternating signal and a correction time-period signal, the alternating signal indicating alternating of an opposed electrode voltage applied to an opposed electrode, the correction time-period signal indicating a time period during which a correcting voltage is applied to the opposed electrode voltage applied to the opposed electrode, and an opposed electrode voltage generating circuit that, in accordance with the alternating signal and the correction time-period signal and with respect to the alternated opposed electrode voltage applied to the opposed electrode, adds an upwardly convex correcting voltage to the alternated opposed electrode voltage when the alternated opposed electrode voltage is a positive polarity voltage, and subtracts the upwardly convex correcting voltage from the alternated opposed electrode voltage when the alternated opposed electrode voltage is a negative polarity voltage.

Abstract: A method for fabricating a liquid crystal display device comprises steps of forming a first metal layer on a substrate and patterning the first metal layer into a plurality of scanning signal lines using a photolithographic treatment; forming a first insulating film, a semiconductor layer, and a second metal layer sequentially in this order on the substrate so as to cover the plurality of scanning signal lines thereby without a photolithographic treatment; patterning the second metal layer into a plurality of data lines and a plurality of electrodes using a photolithographic treatment so that the plurality of data lines extend in a transverse direction to extension directions of the plurality of scanning signal lines and each of the plurality of electrodes confronts one of the data lines on one of the plurality of the scanning signal lines; etching the semiconductor layer using a mask; forming a second insulating film on the data lines, the electrodes, and the first insulating film; forming a plurality of ope

Abstract: An active matrix type display device having first and second substrates, and a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form. A plurality of pixels are formed by adjoining the drain lines and the gate lines. A gate terminal is connected to the gate line formed on the first substrate, and a drain terminal is connected to the drain line formed on the first substrate. At least a pixel electrode is formed on the first substrate in each pixel, at least a counter electrode is formed on the first substrate in each pixel, and the gate terminal and the drain terminal are formed by the same layer of the counter electrode.

Abstract: An active matrix type liquid crystal display device having first and second substrates with a liquid crystal layer between the first and second substrate. A plurality of drain lines and gate lines are formed on the first substrate and cross each other in a matrix form. A plurality of pixels are formed by adjoining the drain lines and the gate lines. At least a signal line is formed with at least two contact holes over the signal line in each pixel, and the two contact holes is arranged to connect between different electrodes.

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 method for fabricating a liquid crystal display device comprises steps of forming a first metal layer on a substrate and patterning the first metal layer into a plurality of scanning signal lines using a photolithographic treatment; forming a first insulating film and an semiconductor layer consecutively in this order without a photolithographic treatment on the substrate so as to cover the plurality of scanning signal lines thereby, and then forming a second metal layer on the semiconductor layer; patterning the second metal layer into a plurality of data lines and a plurality of electrodes using a photolithographic treatment so that the plurality of data lines extends in a transverse direction to extension directions of the plurality of scanning signal lines and each of the plurality of electrodes confronts one of the data lines on one of the plurality of the scanning signal lines; etching the semiconductor layer using the data lines and the electrodes as a mask; forming a second insulating film on the da

Abstract: A liquid crystal display device suitable for generating an electric field sufficiently between the pixel electrode and the counter electrode to control the orientations of the liquid crystal molecules lying therebetween has a simple structure. A liquid crystal display device has a pair of substrates superposed on one another between which a liquid crystal layer is sealed, at least one video signal line and at least one pixel being formed on a surface of one of the pair of substrates confronting the liquid crystal layer. The pixel has at least one pixel electrode and at least two counter electrodes spaced from each other, and one of the counter electrodes is disposed adjacent to the one video signal line. The one video signal line and the one of the counter electrodes are spaced from one another by at least two insulating regions disposed along the surface, and one of the insulating regions comprises a material having a higher permittivity than that of the other regions.

Abstract: A liquid crystal display device comprising a wiring line of a laminated structure over an insulating substrate. The laminated structure includes a first layer made of a first metal layer, and a second layer formed over the first layer and made of a second metal layer having the same principal component as that of the first metal layer but a different added element and/or a different composition. The first layer has a side end face of a right-tapered shape, whereas the second layer has a side end face set at a right angle or counter-tapered with respect to the substrate face.