Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Other

Kenkichi Suzuki

Katsumi Kondo

Genshiro Kawachi

Hidetoshi Abe

Tohru Sasaki

Masuyuki Ohta

Junichi Ohwada

Hiromu Terao

Tetsuya Nagata

Masakazu Saito

Michiko Takahashi

Toshio Ogino

Masanobu Miyano

Masaaki Matsuda

Shigeru Nakamura

Akira Arimoto

Masahito Ohe

Shigeru Matsuyama

Katsuhiko Shibata

Hideo Sato

Shinichi Komura

Ikuo Hiyama

Takeshi Watanabe

Yoshiro Mikami

Makoto Tsumura

Junichi Hirakata

Yukio Okamoto

Masahiro Yanai

Masaaki Kitajima

Hideaki Kawakami

Ryoichi Sudo

Fusaji Shoji

Akira Misumi

Masaru Takabatake

Minoru Hiroshima

Masayoshi Suzuki

Masanao Yamamoto

Osamu Itoh

Ryoji Oritsuki

Masaharu Kumada

Akihiko Kougami

Naoki Kikuchi

Jun-ichi Ohwada

Tatsuya Ohkubo

Shinichi Shinada

Masaaki Kitazima

Masayoshi Ezawa

Hitomi Madokoro

Shigeo Shimomura

Michio Ooue

Yuichi Hashimoto

Hayao Kozai

Toshikazu Horii

Takashi Isoda

A display device includes a pixel region having a plurality of pixels and a peripheral circuit region disposed at a periphery of the pixel region for driving the pixels. The peripheral circuit region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a first kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the first kind is at least 3 &#x3bc;m. The pixel region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a second kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the second kind is at least 0.05 &#x3bc;m.

Semiconductor device including a TFT having large-grain polycrystalline active layer, LCD employing the same and method of fabricating them

A process for manufacturing a liquid crystal display device including a step of irradiating polarized UV light to an orientation film formed on a substrate. A power of the irradiating polarized UV light is set to a value which is less than 10 mJ/cm.

Polarized UV light irradiation method for liquid crystal display device

A liquid crystal display device having a pair of substrates with a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates includes a plurality of scanning electrodes, a plurality of signal electrodes arranged so as to cross the plurality of scanning electrodes, a plurality of thin film transistors arranged in the vicinity of crossing points of the scanning electrodes and the signal electrodes, a plurality of common electrodes, and a plurality of pixel electrodes arranged between each of the common electrodes. An electric field is formed in the liquid crystal layer by applying a voltage to the pixel electrodes and the plurality of common electrodes. The other substrate of the pair of substrates includes color filters, an insulating film for flattening the color filters arranged on the color filters, and an orientation control film arranged on the insulating film.

Color liquid crystal display device using color filter and liquid crystal layer with d&bull;&Dgr;n of specified range

A drive circuit for a liquid crystal display apparatus and a large-sized liquid crystal display apparatus integrated with the drive circuit and having a reduced area occupied by the circuits. The drive circuit includes sample/hold circuits for sampling the input voltage at a predetermined timing, comparator circuits for comparing the output of the sample/hold circuits with the voltage of the signal line VD(i), switches for controlling the output voltage of the signal line, a voltage supply circuit constituted as an image signal control circuit for supplying a voltage to the switches, and control circuits for controlling the switches in accordance with the output of the comparator circuits. For the liquid crystal display panel drive circuit configured as described above, the signal line is controlled by the switches, and therefore the area occupied by the drive circuits can be reduced.

Liquid crystal display panel drive circuit and liquid crystal display apparatus having two sample/hold circuits coupled to each signal line

A display device includes a pixel region having a plurality of pixels and a peripheral circuit region disposed at a periphery of the pixel region for driving the pixels. The peripheral circuit region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a first kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the first kind is at least 3 &mgr;m. The pixel region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a second kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the second kind is at least 0.05 &mgr;m.

A liquid crystal display device including a pair of substrates, a liquid crystal layer interposed between the pair of substrates, a plurality of first common electrodes extending in a direction and being formed on one substrate of the pair of substrates, and a second common electrode connected to one of the first common electrodes. The second common electrode has a first edge adjacent the one of the first common electrodes and a second edge opposite to the one of the first common electrode. A first pixel electrode is formed between two of the first common electrodes and extends in the same direction as the first common electrodes. A second pixel electrode overlaps the second common electrode, is connected to the first pixel electrode, and covers at least a portion of the first edge of the second common electrode.

Liquid crystal display device with common electrode arrangement

A polarized light irradiation method for achieving both wide view-field angles and display uniformity with less display irregularity as well as an apparatus for use in attaining this polarized light irradiation method. After reshaping output light from a light source,into a beam pattern BP, a polarized light separation plate,is used to separate therefrom only P-polarized wave components while simultaneously causing the polarizing axis of the separated P-polarized wave components to be identical to the short side direction of the rectangular beam pattern BP thereby letting it pass through an organic high-molecular or polymeric film acting as an optical radiation surface,for addition of a liquid crystal orientation controllability thereto.

Liquid crystal display device having orientation film oriented by light

A semiconductor device has a thin film transistor including an insulating substrate, an island made of a polycrystalline semiconductor material and disposed on the insulating substrate, a conductive layer made of the polycrystalline semiconductor material and at least one of metals and metallic silicides and surrounding the island, a source region and a drain region spaced from the source region, the source region and the drain region being formed in said island, a gate electrode disposed on the island with an insulating film interposed between the island and the gate electrode, the gate facing a spacing between the source region and the drain region. The polycrystalline semiconductor material forming the island and the conductive layer are fabricated by initially annealing a first amorphous semiconductor material deposited on the insulating substrate with a crystallization-inducing layer made of the at least one of metals and metallic silicides and having a hole corresponding to the island, the crystallization-inducing layer being disposed on a surface of the amorphous semiconductor material on at least one of a substrate side thereof and a side thereof opposite from the substrate side, and then by depositing a second amorphous semiconductor material on the first amorphous semiconductor and annealing the second amorphous semiconductor material.

A liquid crystal display device has a plurality of pixel elements, the optical transmissivity of which is varied by suitable electrical signals. The liquid crystal display device has electrodes which apply electric fields to a liquid crystal layer, the electric fields having components in a direction generally parallel to the liquid crystal layer. Each pixel element has at least one pixel electrode which extends in a common direction as a signal electrode and common electrodes which extend over several pixel elements. The common electrodes may be on the same side of the liquid crystal layer as the pixel and signal electrodes, or they may be on opposite sides. Each pixel may have two pixel electrodes with the signal electrode disposed therebetween, and there are then a pair of common electrodes with the pixel electrodes therebetween. The common electrodes may be common to adjacent pixel elements. The pixel electrodes and the common electrodes may be separated by an insulating film.

Liquid crystal display device with arrangement of common electrode

The liquid crystal display device has a plurality of pixel elements, the optical transmissivity of which is varied by suitable electrical signals. The liquid crystal display device has electrodes which apply electric fields to a liquid crystal layer, the electric fields having components in a direction generally parallel to the liquid crystal layer. Each pixel element has at least one pixel electrode which extends in a common direction as signal electrodes and common electrodes which extend over several pixel elements. The common electrodes may be on the same side of the liquid crystal layer as the pixel and signal electrodes, or they may be on opposite sides. Each pixel may have two pixel electrodes with the signal electrode therebetween and there are then a pair of common electrodes with the pixel electrodes therebetween. The common electrodes may be common to adjacent pixel elements. The pixel electrodes and the common electrodes may be separated by an insulating film.

Liquid crystal display device

An information indicator suitable for information processors such as personal computers, word processors and the like includes a light source, a scattering plate which scatters light from the light source, an indicator plate irradiated with scattered light from the scattering plate, and a prism plate operatively arranged with respect to the scattering plate and the indicator plate and having a prism-like protuberance structure formed at a side thereof. The prism plate is so disposed that the prism-like protuberance structure faces the scattering plate, and the angle 2.theta. constituting the prism-like protuberance structure is defined by the formula, 2.theta..ltoreq.2/3.times.(.pi./2+2.times.arcsin (n'/n)), in this inequality, n is the refractive index of said prism plate medium, and n' is the refractive index of a material in which the prism plate is arranged.

Prism plate for efficiently emitting light flux within a predetermined

In a liquid crystal display substrate in which the pixel electrode is applied with a voltage through the drain and source of a thin-film transistor (TFT) that conducts by a voltage applied to the TFT gate electrode, this gate electrode and a busline connected to the gate electrode are formed as a multi-layered structure consisting of a gate layer and at least two layers of a gate insulation film and an amorphous silicon film. The multi-layered structure is formed by etching through a single mask.

Liquid crystal display device having multilayer gate busline composed of

A testing method is provided for a semiconductor device which includes a control terminal and a pair of main terminals wherein one of the main terminals is isolated from the outside by a dielectric. First, a voltage which changes with time is applied to the isolated main terminal through the dielectric. A control signal which controls conduction and non-conduction of the semiconductor device is the applied to the control terminal. Following this, the test is made by detecting a displacement current flowing through at least one of the two main terminals and the control terminal.

Method for testing an on-off function of semiconductor devices which

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Mobara, Japan

Kenkichi Suzuki