Victor Company of Japan, Limited

Jvc Kenwood Corporation

Taku Katayama

Masato Furuya

Yoshihiro Hori

Yoshihisa Koyama

Hideo Kurogane

Manabu Endou

Manabu Endo

Toshiki Yoshida

Shuichi Konno

Takashi Kozakai

Aiichiro Fujiyama

Masashi Yoshimura

Katsuhiko Morita

A liquid crystal display apparatus is composed of a plurality of pixels, a plurality of switches and a driver circuit for driving the plurality of switches. Each of the plurality of pixels is provided with a liquid crystal element in which a liquid crystal layer is sandwiched between a pixel driving electrode and a common electrode confronting with each other, a first sampling and holding circuit, a second sampling and holding circuit and a switching device. The switching device switches a positive image signal voltage and a negative image signal voltage, and supplies the positive and negative image signal voltages alternately to the pixel driving electrode.

Liquid crystal display apparatus, and driving circuit and driving method thereof

An LED (light emitting diode) array of the present invention has a plurality of light emitting diodes aligned in row on a substrate crystal. Each of the light emitting diodes has a double hetero-structure formed by causing a light emitting layer to be interposed between p-type and n-type semi-conductive layers and is isolated with isolating mesa grooves. A reflecting layer is provided between the substrate crystal and one of the p-type and n-type semi-conductive layers. The reflecting layer comprises a plurality of semi-conductive layers having at least different refractive indexes of 2 or more than 2-kinds, each of the semi-conductive layers made of semiconductor having the same polarity as that of the substrate crystal and having a wider forbidden band width than that of the light emitting layer. Further, the isolating mesa grooves are provided by a wet etching using an etching liquid of H.sub.3 PO.sub.4 .multidot.H.sub.2 O.sub.2 having volume ratio of H.sub.3 PO.sub.4 : H.sub.2 O.sub.2 =1.about.5:1, thus, the LED array having a high integration and a high light emitting output can be successfully produced.

Light emitting diode array and production method of the light emitting

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Kanagawa-ken, Japan

Taku Katayama