Hitachi, Ltd.

Masahiro Ishi

Kikuo Ono

Nobuyuki Suzuki

Masuyuki Ohta

Masayuki Ohta

A liquid crystal display device is provided which includes first and second substrates with liquid crystal therebetween. Gate lines and drain lines are formed on the first substrate with pixel regions defined by the gate signal lines and drain signal lines. Each pixel region includes a pixel electrode and a counter electrode formed in different layers from one another, with the counter layer being formed in a layer closer to the liquid crystal layer than the pixel electrode.

Liquid crystal display device

An active matrix type liquid crystal display device having a first and a second substrate with a liquid crystal layer therebetween, a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form, and a plurality of counter signal lines formed on the first substrate and extending along an extension direction of the gate lines. Pixels are delimited by adjacent ones of the drain lines and the gate lines. A counter signal line connects counter electrodes of neighboring pixels which are arranged with a drain line therebetween by crossing the drain line, and the counter electrodes of neighboring pixels which are arranged with a gate line therebetween are electrically connected by a connecting member. The connecting member is arranged so as to be spaced with respect to the drain line in plane view.

Liquid crystal display device with connecting member of counter electrodes

An active matrix type liquid crystal display device includes first and second substrates with a liquid crystal layer therebetween, 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 formed by adjoining the drain lines and adjoining the gate lines, and at least a pixel electrode formed on the first substrate in each pixel, a first reference line is arranged along one of the adjoining gate lines in each pixel, a second reference line is arranged along another of the adjoining gate lines in each pixel, and the pixel electrode crosses only one of the first reference line and the second reference line.

Liquid crystal display device with first and second reference lines in each pixel

An active matrix type liquid crystal display device includes a first and second substrate with a liquid crystal layer therebetween, 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 formed by adjoining the drain lines and the gate lines, at least a counter electrode and at least a pixel electrode formed on the first substrate in each pixel; and at least a light blocking film formed on one of the first and second substrate. The light blocking film is arranged substantially parallel to the gate line and each light blocking film is spaced from and in overlapping relation with the drain line. At least one counter electrode has an overlapping relation with the drain line in plan view and extends in a region of the light blocking film. The counter electrode is made of a transparent conductive layer, and the liquid crystal display device has a normally black mode.

Liquid crystal display device having counter electrode with overlapping relation with drain line and extends in region of light-blocking film

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.

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.

Liquid crystal display device wherein gate terminal and drain terminal are formed by same layer of counter electrode

An active matrix type liquid crystal display device including first and second substrates, a liquid crystal composition layer provided between the first and second substrates, a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form, a plurality of reference lines formed on the first substrate, and a plurality of pixels formed by adjoining the drain lines and the gate lines. At least one pixel electrode is formed in each pixel with the pixel electrode having first and second layers. An area of the first layer is smaller than that of the second layer, and a ratio of an overlapped area between the first layer and one of the reference lines to an area of the first layer is greater than that between the second layer and the one of reference lines to an area of the second layer.

Liquid crystal display device with specified overlapping and nonoverlapping areas in a pixel

An active matrix type liquid crystal display device including first and second substrates, a liquid crystal composition layer provided between the first and second substrates, a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form, a plurality of counter lines formed on the first substrate, and a plurality of pixels formed by adjoining the drain lines and the gate lines. At least one counter electrode is formed on one of the drain lines with an insulating layer therebetween. A layer on which one of the counter lines is formed and a layer on which the at least one counter electrode formed are different, and the one of the counter lines and the at least one counter electrode for one of the pixels are connected via a through hole.

Liquid crystal display device including counter electrodes formed on the drain lines with insulating layer therebetween

A liquid crystal display device can realize a broad visual field angle comparable to a cathode ray tube and produce a high brightness and a high image quality, with low power consumption and a narrow frame. To achieve these features, in an active matrix system liquid crystal display device, a counter electrode and a pixel electrode are linearly formed so as not to flatly overlap each other, thus enabling generation of an electric field parallel to the substrate surface, and an insulating film having a specific dielectric constant not greater than 4 is formed on a drain line, thus forming the counter electrode on the insulating film to cover the drain line.

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Mobara, Japan

Masahiro Ishi