Nec Corporation

Nec Lcd Technologies, Ltd.

Nippon Electric Co., Ltd.

Nec C Orporation

Yoshihiko Hirai

Masayoshi Suzuki

Teruaki Suzuki

Hiroaki Matsuyama

Toshiya Ishii

Michiaki Sakamoto

Seiji Suzuki

Ken Sumiyoshi

Yuji Yamamoto

Mamoru Okamoto

Kiyomi Kawada

Ken-Ichi Takatori

Shinichi Nishida

Makoto Watanabe

Hideya Murai

Kazumi Kobayashi

Eishi Mizobata

Naoyasu Ikeda

Setsuo Kaneko

Hiroshi Kanoh

Eriko Fujimaki

Hideo Shibahara

Daisuke Inoue

Hiroyuki Uchida

Hiroaki Tanaka

Takahiko Watanabe

Shinichi Nakata

Hirotaka Yamaguchi

Toshiaki Ishiyama

Syuusaku Kido

Tsueno Hamaguchi

Kenichiro Naka

Kousaku Ohira

A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.

Liquid crystal display and method of manufacturing the same and method of driving the same

An LCD device includes front substrate and rear substrate sandwiching therebetween an LC layer, front polarizing film and rear polarizing film disposed on the front side of the front substrate and the rear side of the rear substrate, respectively, and a reflecting film disposed on the rear side of the rear polarizing film. The distance between the LC layer and the reflecting film is set at 0.8 mm or smaller, to solve a parallax problem.

LCD device suppressing a parallax problem

An in-plane-switching liquid crystal display unit has a two-dimensional matrix of pixel regions each including a first auxiliary region and a second auxiliary region. When no electric field is applied, liquid crystal molecules in the first and second auxiliary regions are directed in respective orientations that lie at 90&#xb0; with respect to each other. When a voltage is applied, the liquid crystal molecules are rotated in the same direction while maintaining their orientations in the first and second auxiliary regions at 90&#xb0; with respect to each other. Alternatively, the liquid crystal molecules in the first and second auxiliary regions are directed in the same orientation when no electric field is applied, and when a voltage is applied, the liquid crystal molecules are rotated 15 opposite directions while maintaining their orientations in symmetric relationship.

In-plane-switching liquid crystal display unit

A color filter substrate C includes an orientation filmprovided on one surface of another glass substrateand an optical compensation layerprovided on the other surface of the glass substrateand formed from a plastic film. The two substrates are disposed such that the orientation films thereof oppose each other, and polarization platesandare disposed on the outer sides of the two substrates, and a liquid crystal layerhaving a positive refractive index anisotropy is provided between the orientation films. The optical compensation layerhas a negative one axial refractive index anisotropy and can cancel a retardation produced in the liquid crystal layerthereby to suppress white floating of a black display portion.

Transverse electric field active matrix liquid crystal display panel having particular optical compensation layer

To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion. A liquid crystal display device comprises a first substrate on which a plurality of pixel electrodes are formed, a second substrate on which an opposing electrode is formed, and a liquid crystal layer sandwiched between the first and second substrates, the second substrate further having thereon a plurality of protrusions, each of the protrusions being positioned at a substantially central portion of a corresponding one of the pixel electrodes.

Liquid crystal display device

An active matrix liquid crystal display panel by which a good display characteristic can be obtained without suffering from gradation reversal over a wide visibility angle range. A liquid crystal layeris formed such that the thickness thereof varies in accordance with transmission wavelengths of color layersandso that a very good display which does not exhibit any coloring in whichever direction it is viewed may be obtained. An active matrix substrate A includes a plurality of opposing electrodes, a plurality of pixel electrodesparallel to the opposing electrodes, a thin film transistor, and an orientation filmall formed on a glass substrate. A color filter substrate C includes an orientation filmprovided on one surface of another glass substrateand an optical compensation layerprovided on the other surface of the glass substrateand formed from a plastic film. The two substrates are disposed such that the orientation films thereof oppose each other, and polarization platesandare disposed on the outer sides of the two substrates, and a liquid crystal layerhaving a positive refractive index anisotropy is provided between the orientation films. The optical compensation layerhas a negative one axial refractive index anisotropy and can cancel a retardation produced in the liquid crystal layerthereby to suppress white floating of a black display portion.

Active matrix liquid crystal display panel having particular optical compensation layer

An in-plane-switching liquid crystal display unit has a two-dimensional matrix of pixel regions each including a first auxiliary region and a second auxiliary region. When no electric field is applied, liquid crystal molecules in the first and second auxiliary regions are directed in respective orientations that lie at 90&#xb0; with respect to each other. When a voltage is applied, the liquid crystal molecules are rotated in the same direction while maintaining their orientations in the first and second auxiliary regions at 90&#xb0; with respect to each other. Alternatively, the liquid crystal molecules in the first and second auxiliary regions are directed in the same orientation when no electric field is applied, and when a voltage is applied, the liquid crystal molecules are rotated opposite directions while maintaining their orientations in symmetric relationship.

In-plane switching liquid crystal display unit having tinting compensation

Active matrix liquid crystal display panel

In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (B,R,G) as color filters and pixel electrodesare formed on a substrate on the side of the pixel electrodes and slopesare provided along four side peripheries of each pixel electrode. Liquid crystal moleculesbetween each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display. The slope is formed on a step portionformed by a BM layer formed on at least one of a gate electrode, a drain electrode and a source electrode formed in a periphery of the pixel electrode or at least one of a gate wiring and a drain wiring formed in the periphery or a step portion formed by partially overlapping peripheral portions of the adjacent pixel color layers.

Orientation division type liquid crystal display, fabrication method thereof and image display method

An active matrix liquid crystal display panel by which a good display characteristic can be obtained without suffering from gradation reversal over a wide visibility angle range. A liquid crystal layeris formed such that the thickness thereof varies in accordance with transmission wavelengths of color layersandso that a very good display which does not exhibit any coloring in whichever direction it is viewed may be obtained. An active matrix substrate A includes a plurality of opposing electrodesa plurality of pixel electrodesparallel to the opposing electrodesa thin film transistor, and an orientation filmall formed on a glass substrateA color filter substrate C includes an orientation filmprovided on one surface of another glass substrateand an optical compensation layerprovided on the other surface of the glass substrateand formed from a plastic film. The two substrates are disposed such that the orientation films thereof oppose each other, and polarization platesandare disposed on the outer sides of the two substrates, and a liquid crystal layerhaving a positive refractive index anisotropy is provided between the orientation filmsThe optical compensation layerhas a negative one axial refractive index anisotropy and can cancel a retardation produced in the liquid crystal layerthereby to suppress white floating of a black display portion.

In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers ( B, R, G) as color filters and pixel electrodes are formed on a substrate on the side of the pixel electrodes and slopes are provided along four side peripheries of each pixel electrode. Liquid crystal molecules between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display. The slope is formed on a step portion formed by a BM layer formed on at least one of a gate electrode, a drain electrode and a source electrode formed in a periphery of the pixel electrode or at least one of a gate wiring and a drain wiring formed in the periphery or a step portion formed by partially overlapping peripheral portions of the adjacent pixel color layers.

A VA (Vertical Aligned) type active-matrix liquid crystal display capable of stabilizing a boundary position between divided areas (alignment areas). The liquid crystal display comprises a TFT (thin film transistor) substrate including a pixel electrode provided for each pixel and a driving element such as a TFT provided for each pixel electrode, an opposite substrate disposed opposite to the TFT substrate and including an opposite electrode, and a liquid crystal layer sandwiched between the TFT substrate and the opposite substrate. Each pixel electrode has a recess in groove shape formed therein. The pixel electrode preferably has a generally rectangular shape. The recess is provided such that it extends from one of a pair of opposite sides of the pixel electrode to the other to divide the pixel electrode into two parts.

Active-matrix liquid crystal display

Growing community of inventors

Tokyo, Japan

Yoshihiko Hirai