Kabushiki Kaisha Toshiba

Noriko Y Kudo

Satoshi Takayama

Chiaki Tanuma

Shiroh Saitoh

Mamoru Izumi

Tetsuro Itakura

Hitoshi Nagato

Shuzo Hirahara

Hideki Nukada

Isao Amemiya

Yoichi Tokai

Tutomu Saito

Shunsuke Hattori

Hisako Tanaka

Kumi Okuwada

Masami Sugiuchi

Fumihiko Murakami

Atsuko Nakamura

Seizaburou Shimizu

An ink-jet recording apparatus records an image onto a recording medium by flying an ink-droplet from an ink surface by a pressure of an ultrasonic beam. The apparatus including an ultrasonic generating element array having a plurality of ultrasonic elements arranged in an array for emitting ultrasonic beams, a driving device for applying a plurality of pulses having different phases from each other, and a converging device for converging the ultrasonic beams by interfering the ultrasonic beams with each other. The generating elements are simultaneously driven and sequentially shifted in an array direction, and the converging device converging the ultrasonic beams in a direction perpendicular to the array direction.

Ink-jet recording device having an ultrasonic generating element array

A driving circuit controls a time for applying a drive signal to a piezoelectric element so as to bring a control in the number of ink droplets squirted from a liquid surface of liquid ink according to a gray scale level of an image to be printed on a printed object. According to application of the drive signal, acoustic waves emitted from a piezoelectric element array are focused in a main scanning direction, made incident to an acoustic lens via an acoustic matching layer, further focused in a direction orthogonal to the main scanning direction and focused in a vicinity of the liquid surface in a point form. In the vicinity of the liquid surface, an ink liquid mound is formed by means of pressure (discharging pressure) generated by the focused acoustic waves and then from a tip of the ink liquid mound an ink droplet according to the application time is squirted. The squirted ink droplet is ejected and stuck to the printed object. By performing main and subscanning to the printed object, a two-dimensional image is printed thereon.

Ink-jet printer using RF tone burst drive signal

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Yokohama, Japan

Noriko Y Kudo