Kyocera Corporation

Brother Kogyo Kabushiki-kaisha

Hisamitsu Sakai

Kenichi Satake

Shuichi Fukuoka

Atsushi Ishihara

Takayuki Yamamoto

Shuzo Iwashita

Takashi Miyahara

Masashi Kato

Sin Ishikura

Chihiro Takeshita

Hitoshi Ookoda

Atsuo Sakaida

Kazuo Watada

Hiroshi Aida

Shin Ishikura

Akihiko Nishimoto

Koji Hamada

Kiyohiro Sakasegawa

Toshikazu Kishino

Junji Hatanaka

Tetsuya Maeda

An ink contains a medium, a coloring agent, a fixing polymer, and one or more kinds of polymers other than the fixing polymer. The coloring agent is dissolved or dispersed in the medium. The fixing polymer has a glass-transition temperature higher than the ordinary temperature and is dispersed in the medium. The one or more kinds of polymers each have a glass-transition temperature higher than the ordinary temperature and are dissolved or dispersed in the medium. The fixing polymer is higher in glass-transition temperature than 80 mass % or more of the one or more kinds of polymers contained in the ink and each having a glass-transition temperature higher than the ordinary temperature.

Ink, ink set and printer

A printing apparatus includes an ink ejector, a dryer, and a melting device. The ink ejector ejects an ink to an object on which a printed record is to be produced. The ink contains a medium and a fixing polymer. The dryer heats the object to expedite evaporation of the medium. The melting device is configured to irradiate the ink on the object with ultraviolet rays to subject the ink to heat that causes the fixing polymer to melt and to fix the ink to the object accordingly.

Printing device

A method for driving a liquid ejector () provided with a piezoelectric actuator () including a piezoelectric ceramic layer () having a size covering a plurality of pressurizing chambers (). An arbitrary piezoelectric deformation region () of the liquid ejector () is deflected in one thickness direction and the opposite direction individually by applying a driving voltage waveform including a first voltage (&#x2212;V) and an equivalent second voltage (+V) of the opposite polarity in order to vary the volume of the pressurizing chambers () of a corresponding liquid droplet ejecting portion (), and a liquid droplet is ejected through a communicating nozzle (). Since gradual creep deformation of the inactive region () of the piezoelectric ceramic layer () is prevented, the ink droplet ejection performance is maintained at a good level over a long period.

Method for driving liquid ejector

A method for driving a liquid drop ejector () equipped with a piezoelectric actuator () including a piezoelectric ceramic layer () having a size covering a plurality of pressurizing chambers (). An arbitrary piezoelectric deformation region () of the liquid drop ejector () is deflected in one thickness direction and the opposite direction, respectively, by applying a driving voltage waveform including a first voltage (&#x2212;V) and an equivalent second voltage (+V) of the opposite polarity in order to vary the volume of the pressurizing chambers () of a corresponding liquid drop ejecting portion (), and a liquid drop is ejected through a communicating nozzle (). Since gradual creep deformation of the inactive region () of the piezoelectric ceramic layer () is prevented, the ink drop ejection performance is maintained at a good level over a long term.

An inkjet head has: a channel unit having a plurality of nozzles and a plurality of pressure chambers respectively communicating with the nozzles; and an actuator unit on the channel unit and having a piezoelectric sheet, a plurality of individual electrodes respectively arranged to positionally correspond to the pressure chambers respectively and a common electrode sandwiching the piezoelectric sheet together with the plurality of individual electrodes. The actuator unit has a thickness of 20 &#x3bc;m to 100 &#x3bc;m and a surface roughness of the end face of the actuator unit including an intersection with channel unit and the actuator unit is 0.15 &#x3bc;m to 0.5 &#x3bc;m, and at least part of the end face is sealed by a resin film.

Inkjet head

The present invention is directed to a method for driving a piezoelectric ink jet head comprising a piezoelectric actuator AC that includes two piezoelectric ceramic layershaving such a size that covers the plurality of pressure chambers, wherein an electric field of opposite sense to the polarizing direction is applied to the second piezoelectric ceramic layerby using the common electrodesand, (1) for the pressure chambersfrom which the ink is discharged, an electric field of the same sense as the polarizing direction of the layer is applied to the first piezoelectric ceramic layerby using the individual electrodeand the first common electrode, thereby causing the region of the piezoelectric actuator AC to deflect toward the pressure chamber, while (2) for the pressure chambersfrom which the ink should not be discharged, an electric field of the opposite sense to the polarizing direction is applied to the first piezoelectric ceramic layerby using the electrodes, thereby to maintain the region of the piezoelectric actuator AC in the initial state, so as to discharge an ink droplet selectively through the nozzlethat communicates with the pressure chamberdescribed in (1) and form a dot.

Method of driving piezoelectric ink jet head

Method for driving piezoelectric ink jet head

In a plasma display device comprising a pair of opposing insulating substrates and a plurality of light emitting cells formed from partition walls which divide the space between the insulating substrates while a plurality of electrodes are formed in the light emitting cells and the inner space is filled with a discharge gas and plasma being generated by applying a voltage selectively between the electrodes so that the fluorescent substances formed on the inner walls of the light emitting cells emit light as light emitting elements, wherein sizes of the light emitting cells of different colors are made different according to the luminance of the fluorescent substance of the corresponding color. That is, cells which emit light of a color of luminance lower than the other cells are made with larger opening to obtain equally high luminance for all the three primary colors, thereby mitigating the deviation in the luminance among the fluorescent substances and achieving full-color display of high image quality with high color purity.

Plasma display device

A plasma display substrate comprising a rear plate and a plurality of partitions for forming display cells between every two adjacent partitions on one of the surfaces of the rear plate, wherein the partitions are molded independently of the rear plate with the mixture of ceramic or glass powder and a binder inclusive of organic additives and solvents are formed in a desired shape and a desired disposition on one of the surfaces of the rear plate made of ceramics or glass, and integrally joined to the rear plate. According to the substrate, the display cells have improved dimensional accuracy, particularly, the partitions having highly accurate flat side surfaces with no deformation and having a predetermined height can be formed easily. This disclosure also provides a method of producing the same.

Growing community of inventors

Kagoshima, Japan

Hisamitsu Sakai