Mita Industrial Co., Ltd.

Sumitomo Electric Industries, Limited

Yuki Ito

Ryuji Wataki

Noritaka Okazaki

Michio Uchida

Eiichi Tone

Yoshiko Uriu

Koji Umeno

Yuzuru Nanjo

Eiji Nimura

Shigeo Fujita

Mitsuru Ekawa

A semiconductor optical device, in which a light emitting region and a modulator region are integrated, includes a first mesa disposed in the light emitting region, protruding in a direction that intersects a light propagation direction, and including an active layer, first and second buried layers disposed on the first mesa in a direction that intersects the light propagation direction and sequentially stacked in a direction in which the first mesa protrudes, a first semiconductor layer disposed on the first mesa and the second buried layer, a second mesa disposed in the modulator region and including a light absorption layer, and a third buried layer disposed on the second mesa. The first semiconductor layer and the first buried layer each have a first conductivity type. The second buried layer has a second conductivity type different from the first conductivity type, and the third buried layer is a semi-insulating semiconductor layer.

Semiconductor optical device having distributed feed-back type laser and electroabsorption-type modulator

An ink ejecting device includes an ink ejecting member having an ink chamber and a nozzle at a specified position thereof; an ink ejecting driver for reducing the volume of the ink chamber to eject out ink from the ink chamber through the nozzle; and a controller connectable to an image data generator generating image data indicative of a plurality of densities for controlling the ink ejecting driver to regulate the volume reduction of the ink ejecting chamber in accordance with image data. Ink is ejected at an amount corresponding to image data indicative of a density. An image having a gradation can be printed at a high speed accurately and clearly with a simplified construction.

Ink jet printing apparatus which utilizes different voltages applied to

An image reading device includes a photoelectric conversion array of a number of photoelectric conversion elements arranged in a first direction; and a scanner which scans photoelectric conversion elements in the first direction, the scanner having: a first scanning mode of scanning respective photoelectric conversion elements of two or more primary regions defined in the photoelectric conversion array in parallel; and a second scanning mode of scanning respective photoelectric conversion elements of two or more secondary regions defined in a particular primary region in parallel, and a switch which switches over the first and second scanning modes.

Image reading device

An image forming machine equipped with a transfer belt unit includes a safety detecting means for detecting the completion of setting of an opening/closing member constituting the image forming machine, and a controlling means for controlling the operation of a driving means for a driving roller on the basis of a signal from the safety detecting means. When the safety detecting means signals the completion of the setting after signaling the incompletion of the setting, the controlling means controls the driving means so as to perform a reverse driving, thereby driving the driving roller reversely by a predetermined amount.

Image forming machine

A transfer plate which also serves as a sheet guide plate is pushed by a torsion spring. A minimum gap less than 0.2 mm between a guide surface of the transfer plate and the surface of a photoreceptor drum is maintained to be smaller than the thickness of a transfer sheet by a spacer member provided on the guide surface. When the sheet passes through the gap between the drum surface and the guide surface, the transfer plate is pushed down by the sheet and the sheet is pressed onto a toner image formed on the drum surface with an appropriate pressure by the pushing force of the torsion spring. At this time, a transfer voltage is applied to the transfer plate, so that the toner image on the drum surface is transferred to the sheet.

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Osaka, Japan

Yuki Ito