Hitachi, Ltd.

Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Japan Display Inc.

Masahito Ohe

Katsumi Kondo

Kazuhiko Yanagawa

Keiichiro Ashizawa

Masuyuki Ohta

Kazuhiro Ogawa

Masahiro Yanai

Sukekazu Aratani

Nobutake Konishi

Hagen Klausmann

Yasuyuki Mishima

Masuyuki Ota

Ikuo Hiyama

Yuka Utsumi

Osamu Itoh

Shigeru Matsuyama

Masaaki Matsuda

Masahiko Ando

Kenkichi Suzuki

Hidehiro Sonoda

Hiroaki Asuma

Shuichi Ohara

A liquid crystal display device includes a first substrate, a pixel electrode and a counter electrode, an insulation film, and a first orientation film formed over the pixel electrode and the counter electrode on the first substrate, the first orientation film being responsive to a radiated polarized light to obtain an initial orientation direction. A second substrate is opposed to the first substrate, a second orientation film is formed over the second substrate, and a liquid crystal is sealed between the first and second substrates. The first and second orientation films are made of polyimide, the liquid crystal has negative dielectric anisotropy, and the liquid crystal display device is normally in a black mode. An angle formed between the electric field and the initial orientation direction of the first orientation film is in a range of greater than 0&#xb0; to 45&#xb0;.

In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions

A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an orientation film formed on the first substrate. The orientation film has two orientation regions in a pixel, and the orientation regions are formed by polarized light.

A liquid crystal display device includes a first substrate, a second substrate, a first electrode and a second electrode formed on the first substrate, the second electrode being arranged at an upper layer with respect to the first electrode, a drain signal line and a gate signal line formed on the first substrate, and a liquid crystal layer driven by an electric field formed between the first electrode and the second electrode. The first electrode extends in parallel to the drain signal line and the second electrode extends at a slanted direction to the drain signal line.

A liquid crystal display device includes a first substrate and a second substrate with a liquid crystal material sandwiched therebetween, neighboring first, second, third and fourth regions arranged in a rectangular shape and in a clockwise direction, the first, second, third and fourth regions having a first pixel electrode, a second pixel electrode, a third pixel electrode and a fourth pixel electrode, respectively. The first pixel electrode and the third pixel electrode extend in a parallel direction to one another, and the second pixel electrode and the fourth pixel electrode extend in a parallel direction to one another.

A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween with a plurality of scanning signal lines and of video signal lines being formed on a first substrate. The scanning and video signal lines are arranged in a shape of a grid, and a pixel region is defined as a region surrounded by the scanning and video signal lines. A black matrix is formed on a second substrate, is arranged in a position overlapped on the scanning and video signal lines, and has an opening portion in each pixel region. A plurality of first electrodes are provided on the first substrate, and a plurality of second electrodes are provided on the second substrate, wherein at least one of first electrodes and at least one of the second electrodes are arranged in a position overlapped with the opening portion.

A liquid crystal display apparatus includes a liquid crystal panel having polarizers, and a back light having a light source for illumination of the liquid crystal panel which has a characteristic of spectral transmittance required to satisfy the following equation, x&#x3e;y&#x3e;z, when a medium tone display voltage varies in a range between a minimum and maximum voltage for a Blue pixel, where 'x' is a value of the transmittance in the panel at a wavelength corresponding to a longest wavelength in a range of wavelengths designated for blue light, 'y' is a value of the transmittance in the panel at a wavelength corresponding to a maximum value of the intensity in a range of wavelengths designated for green light, and &#x201c;z&#x201d; is a value of the transmittance in the panel at a wavelength corresponding to a maximum value of the intensity in a range of wavelengths designated for red light.

Active matrix type liquid crystal display apparatus

A liquid crystal display apparatus includes a liquid crystal panel including a pair of polarizers, and a back light provided at a back side of said liquid crystal panel. The liquid crystal panel is an active matrix type liquid crystal panel enabling display and has a characteristic of spectral transmittance required to satisfy the following equation, &#xd7;&#x3e;y, when a drive voltage is applied thereto so as to vary from a dark state to a light state, in which 'x' is a value of the transmittance in the liquid crystal panel at a wavelength which corresponds to one of 490 nm and 500 nm, and 'y' is a value of the transmittance in the liquid crystal panel at a wavelength which corresponds to 545 nm.

A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of said pair of substrates, a plurality of first electrodes on the one of said pair of substrates and a plurality of second electrodes on the one of said pair of substrates to drive the liquid crystal by a voltage difference with respect to the first electrode. The first electrodes have a bent form, and the second electrodes have a rectangular form.

A liquid crystal display apparatus having a liquid crystal panel including a pair of substrates, a plurality of electrodes formed on at least one of the pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, and a light source provided on one surface of the liquid crystal panel. An electric field in the liquid crystal layer produced by the plurality of electrodes is predominantly in parallel with surfaces of the pair of substrates. The light source has a luminous characteristic with a first chromaticity and the liquid crystal panel has a characteristic of spectral transmittance with a second chromaticity different from the first chromaticity so as to compensate for the color of the light source.

A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of the pair of substrates, a plurality of first electrodes provided on the one of the pair of substrates, and a plurality of second electrodes provided on the one of the pair of substrates to drive the liquid crystal layer by a voltage difference with respect to the first electrode. The first electrode and the second electrode are arranged in different layers with an insulating layer therebetween. The first electrode has a bent form and each first electrode is connected by connecting portion in each pixel, and the connecting portion has an overlapping relation with at least one the second electrode and a signal line connected to the second electrode.

An active matrix type liquid crystal display apparatus having a pair of substrates, a liquid crystal layer between the substrates, an orientation film a scanning signal electrode, an image signal electrode, a pixel electrode and an active device. Each of the electrodes is arranged so as to apply an electric field, mainly parallel to the substrates. At least one of the electrodes is disposed between at least two dielectric layers disposed above and below the at least one of the electrodes. The resistivity of the liquid crystal layer is set at a value sufficient to substantially prevent disturbance of the orientation of the liquid crystal layer due to static electricity.

A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, scanning signal lines and video signal lines formed on one of the substrates, first electrodes provided on the one substrate, second electrodes provided on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the first electrode, and an orientation film formed on a nearest surface to the liquid crystal layer on each of the substrates and having an initial orientation direction. At least two first electrodes and at least one second electrode are provided in each pixel with the first electrode and the second electrode having portions substantially in parallel. The at least two first electrode are connected by connecting portion in each pixel.

A liquid crystal display device includes a pair of substrates sandwiching of a liquid crystal layer, plural scanning signal lines and plural video signal lines formed on one of the pair of substrates, and plural pixel regions formed as an area surrounded by an adjacent two of the plural scanning signal lines and an adjacent two of the plural video signal lines. At least a pixel electrode is formed on the one of the pair of substrates in each of the pixel regions, a plurality of counter electrodes is formed on one of the pair of substrates in each of the pixel regions, and at least a counter voltage signal line connects the counter electrodes formed on one of the pair of substrates. The counter voltage signal line is arranged in an overlapping relation with at least one of the scanning signal lines in plan view.

A liquid crystal display device includes a pair of substrates sandwiching a liquid crystal layer, scanning signal lines and video signal lines formed on one substrate, plural pixel electrodes on the one substrate, and at least a counter electrode on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the pixel electrode. An orientation film formed on a nearest surface to the liquid crystal layer on substrate has an initial orientation direction. At least one of the pixel electrode and the counter electrode has a first region and a second region, and an angle formed by the first region and the initial orientation direction is substantially same in absolute value and reverse in polarity to an angle formed by the second region and the initial orientation direction. A length of the first region and the second region are substantially equal.

An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.

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Mobara, Japan

Masahito Ohe