Sharp Kabushiki Kaisha Corporation

Shapr Kabushiki Kaisha

Akihito Jinda

Koichi Miyachi

Makoto Shiomi

Hidekazu Miyata

Kazunari Tomizawa

Iichiro Inoue

Kiyoshi Ogishima

Toshihide Tsubata

Masumi Kubo

Mitsuhiro Murata

Akihiro Yamamoto

Kohhei Tanaka

Yosuke Iwata

Yoshito Hashimoto

Akihiro Shoraku

Hiroshi Hamada

Hiromi Katoh

Masaya Hijikigawa

Takako Koide

Seiji Shibahara

Takashi Shibatani

Hidefumi Yoshida

Yozo Narutaki

Shoichi Ishihara

Akiyoshi Fujii

Shinichi Terashita

Yasuhiko Inami

Hiroshi Yoneda

Hiroyuki Hakoi

Hiroshi Nakanishi

Junichi Tanaka

Shuji Miyoshi

Hisatoshi Furubayashi

Takashi Sugihara

Hiroki Tabuchi

Tadashi Kawamura

Nobuhiro Kuwabara

Nobuyuki Tanaka

Provided is a liquid crystal display device in which both a vertical electric field and a horizontal electric field are used and flickering is hardly recognized. The liquid crystal display device includes a liquid crystal panel and a control unit. The control unit includes a horizontal electric field control unit and a vertical electric field control unit. The horizontal electric field control unit controls the potentials of pairs of drive electrodes included in the liquid crystal panel, and thereby controls a horizontal electric field that is generated between each pair of drive electrodes. The vertical electric field control unit controls the potentials of a common electrode and an opposite electrode included in the liquid crystal panel, and thereby controls a vertical electric field that is generated between the common electrode and the opposite electrode. The horizontal electric field control unit controls the intensity and the polarity of the horizontal electric field when the vertical electric field control unit is causing the vertical electric field to be generated. The vertical electric field control unit inverts the polarity of the vertical electric field when the horizontal electric field control unit is maintaining the polarity of the horizontal electric field.

Liquid crystal display device

Provided is a liquid crystal display device having excellent viewing angle characteristics and high contrast in a display mode using both a vertical electric field and a horizontal electric field. This liquid crystal display device is provided with a first substrate and a second substrate disposed facing each other, and a liquid crystal layer held between said first and second substrates. The liquid crystal layer contains liquid crystal molecules having a negative dielectric anisotropy. The first substrate is provided with a flat plate first electrode, a first insulating layer, and a second electrode provided in a layer other than that of the first electrode and provided separated from the first electrode by the first insulating layer. The second electrode has multiple comb-tooth sections and multiple slits, and the second substrate has a flat plate third electrode. Defining Vas the potential difference between the first electrode and the third electrode, Vas the potential difference between the first electrode and the second electrode, and Vas the potential difference between the first electrode and the second electrode when the lowest gradation is showed, V, Vand Vsatisfy 0&#x3c;|V|&#x2266;|V|&#x3c;|V|.

Provided is a liquid crystal display apparatus employing a drive method whereby nonuniform electric field is not generated in pixels. This liquid crystal display apparatus is provided with a first substrate, a first electrode, a second electrode, a second substrate, a common electrode, a counter electrode, a liquid crystal layer, and a drive unit. The drive unit executes drive operations including: operations of setting the potential of the first electrode at a low level, the potential of the second electrode at a high level, and the potential of the counter electrode at the high level; operations of setting the potential at the high level, the potential at the low level, and the potential at the high level; operations of setting the potential at the low level, the potential at the high level, and the potential at the low level; and operations of setting the potential at the high level, the potential at the low level, and the potential at the low level.

Liquid crystal display apparatus and method for driving liquid crystal display apparatus

A liquid crystal display device includes a vertical alignment liquid crystal layer, first and second substrates, first and second electrodes, and a pixel region which includes first, second, third and fourth liquid crystal domains in which liquid crystal molecules are tilted in first, second, third and fourth directions, respectively. The first liquid crystal domain is located close to at least a part of an edge of the first electrode, the second liquid crystal domain is located close to at least a part of another edge of the first electrode, the third liquid crystal domain is located close to at least a part of still another edge of the first electrode, and the fourth liquid crystal domain is located close to at least a part of yet another edge of the first electrode.

The present invention is arranged such that interlace image data, which has been supplied, is converted to progressive image data in an I/P conversion section, and the image data converted to progressive style in the I/P conversion section is subjected to image processing including data comparison in spatial or time series manner, in an image processing section.

Image processing circuit, image display device, and an image processing method

A liquid crystal display device includes: a vertical alignment liquid crystal layer; first and second substrates facing each other with the liquid crystal layer interposed; first and second electrodes arranged on the first and second substrates to face the liquid crystal layer; and at least one alignment film in contact with the liquid crystal layer. A pixel region includes a first liquid crystal domain in which liquid crystal molecules are tilted in a first direction around the center of a plane, and approximately at the middle of the thickness, of the liquid crystal layer responsive to a voltage applied. The first liquid crystal domain is close to at least a part of an edge of the first electrode. The part includes a first edge portion in which an azimuthal direction, perpendicular to the part and pointing toward the inside of the first electrode, defines an angle greater than 90 degrees to the first direction. The first or second substrate has an opaque member including a first opaque portion for selectively shielding at least a part of the first edge portion from incoming light.

A plurality of display elements each includes two signal lines: Sand S. An electrode, which is one of the electrodes constituting an element capacitor Cp, is connected to the signal line Svia a switching element TFT, while the other electrodeis connected to the signal line Svia a switching element S. The gate electrodes of the switching elements TFTand TFTare connected to a single common scanning line G. With this structure the drive voltage applied to the element capacitor can be increased even when a TFT has a limited withstand pressure.

Display device

A color display device determines a relationship between RGB components of an input color image signal in terms of their gradation levels, and carries out a different calculation for each input color image signal depending on which of six patterns of the relationship that the input color image signal belongs to. Further, the color display device carries out the calculation for each of the RGB components excluding a component with a smallest gradation level, using variables that vary depending on the respective gradation levels of the RGB components.

Color display device, color compensation method, color compensation program, and storage medium readable by computer

The cold cathode tube for illuminating pixels with light which is in accordance with an output signal has luminance which gradually increases at a rise and gradually decreases at a fall per one frame time. The cold cathode tube contains a fluorescent material of only one of three primary colors of light, and has a certain OFF period or dimming period per one frame time. Between a diffusing plate and a reflecting plate are provided partition walls for parting emitting areas, so that the illumination light of one cold cathode tube does not reach the display elements to be illuminated by the other cold cathode tubes. The emission of each display element is changed per one frame time between a normal ON state and a dim state. The cold cathode tube has two or more OFF periods within one frame time, and, luminance of the cold cathode tube is changed per one frame period. As a result, it is possible to suppress shortening of life of emitters in an illuminating section, and to relieve lowering of luminance of the emitters, and also to obtain a desirable display quality even in a fast-moving image.

Liquid crystal display device, image display device, illumination device and emitter used therefor, driving method of liquid crystal display device, driving method of illumination device, and driving method of emitter

A display element according to the present invention is provided with a pair of substrates, at least one of which is transparent; a medium between the substrates, wherein optical anisotropy magnitude of the medium is changeable by and according to an electric field applied thereon; at least one pair of electrodes for applying, on the medium, the electric field substantially parallel to the substrates; and a shielding electrode overlapping at least a display portion of at least one of the substrates, and used for shielding the display element from static electricity.

Display device producing display by changing shape of refractive index ellipsoid of medium by applying electric field to medium

While image data is written into either one of first, second, third frame memoriesand, image data are repetitively read two times from the remaining two memories in one vertical synchronization interval and transferred to an arithmetic unit, and this operation is executed with the frame memories changed sequentially. An arithmetic unitrefers to a look-up table on the basis of two inputted data values and, when the data value of the current image signal is greater than the data value of the previous image signal, the unittransfers image data of a value greater than the data value of the current image signal to a liquid crystal display device. Thus, the step response characteristic is improved for the improvement of the dynamic image display quality.

Liquid crystal display device driving method

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Kitakatsuragi-gun, Japan

Akihito Jinda