Ricoh Company, Ltd.

Kohsuke Inoue

Tomohiro Mizutani

Tetsuya Matsumoto

Hiroki Takahashi

Hirohito Murate

Katsuhiro Tobita

Takeo Shirato

Takatsugu Maeda

Kohtaroh Ikegami

Ryuichi Hayashi

Yasuyuki Horie

Takaaki Kaneko

Shinichiroh Hirabayashi

A liquid ejection apparatus includes a first control unit, a light projection unit, a light reception unit, a determination unit, and a liquid ejection head. The first control unit is configured to change a threshold for determining a lifting of a recording medium conveyed along a conveyance path according to thickness of the recording medium. The light projection unit is configured to emit a detection beam for detecting the lifting of the recording medium. The light reception unit is configured to receive the detection beam. The determination unit is configured to determine the lifting of the recording medium, when the recording medium is detected with a height greater than the threshold by the detection beam. The liquid ejection head is configured to eject liquid to the recording medium.

Liquid ejection apparatus and liquid ejection method

A liquid output apparatus includes a plurality of liquid output heads and a maintenance assembly. The plurality of liquid output heads is arranged in a staggered arrangement. The maintenance assembly is configured to perform maintenance on the plurality of liquid output heads in different rows in a set.

Liquid output apparatus, maintenance control method, and recording medium

A controller for a liquid discharging device generates a correction chart including a reference pattern and a correction part, using a liquid discharged from a liquid discharge head, the liquid discharge head having a plurality of nozzles that are arranged to form a nozzle array. The controller drives a predetermined number of the plurality of nozzles to form the reference pattern on the recording sheet along a direction of the nozzle array, the predetermined number being a number equal to or less than a total number of the plurality of nozzles of the nozzle array, and drives a number of the plurality of nozzles that is different than the predetermined number of nozzles driven in forming the reference pattern, to form the correction pattern on the recording sheet along the direction of the nozzle array.

Liquid discharging device, correction chart generating method, and recording medium

A semiconductor device includes a constant voltage circuit configured to convert an input voltage to a predetermined voltage by controlling an output transistor, and an overheat protection circuit configured to restrict output current of the constant voltage circuit according to temperature of the semiconductor device. The overheat protection circuit includes a diode to detect the temperature of the semiconductor device and a resistor connected in series with the diode.

Semiconductor device performing overheat protection efficiently

A small-scale semiconductor device having several trimming portions is disclosed. The device includes an auxiliary voltage regulator circuit outputting an output voltage and having a first trimming unit for adjusting the output voltage output from the auxiliary voltage regulator circuit; an auxiliary circuit comparing a first voltage with a second voltage and performing a prescribed operation based on the compared result, where the first voltage is in proportion to the output voltage of the auxiliary voltage regulator circuit and the second voltage is generated by a detecting unit, the auxiliary circuit including a second trimming unit for adjusting the first voltage; and a single test terminal, connected to receive any one of the first voltage and the second voltage, provided as an external terminal of the semiconductor device so as to adjust both the first and the second trimming units.

Growing community of inventors

Kanagawa, Japan

Kohsuke Inoue