Seiko Epson Corporation

Hidetoshi Yokoyama

Masaki Tsukida

Yuichi Nishihara

Takayuki Yazawa

Junpei Yoshida

Provided is a liquid detecting unit and a liquid jetting device that avoid generation of air bubbles and deposit of the components of ink due to electrolysis of the liquid when detecting liquid information. The liquid detecting unit is provided with an alternating current generation circuit for generating an alternating current to be applied to the liquid, a detection output generation unit for generating a detection output for detecting the liquid information based on a potential of a first connection point in the alternating current generation circuit and a potential of a second connection point in the alternating current generation circuit, and a detection unit for detecting the liquid information based on the detection output.

Liquid detecting unit and liquid jetting device

A liquid consumption device of the present invention has a holder in which an opening section is provided in a position to face a prism of an ink cartridge, a light emitting section, and a light receiving section. The holder has a region that changes a light amount of the reflected light emitted from the light emitting section and received by the light receiving section in a position spaced apart from the opening section at a predetermined distance in a main scanning direction.

Liquid consumption device having holder and detecting section

A liquid consuming apparatus includes a photosensorhaving a light-emitting portionand a light-receiving portion, a holdercapable of attachably and detachably holding a liquid container in which a prismhaving a face that faces the photosensoris arranged, and a determination unit (a failure determination unit) that determines status of the photosensorbased on the output of the photosensor. When the liquid container is installed in the holder, the determination unit detects a failure of the photosensorbased on a detection signal of the photosensorin the case of causing the light-emitting portionto emit light, and a detection signal of the photosensorin the case of causing the light-emitting portionto turn off the light.

Liquid consuming apparatus and method for controlling liquid consuming apparatus

A printer includes a detection portion in which a light-emitting portionand a light-receiving portionare arranged in a main scanning direction, an ink cartridge in which a prismis arranged, the prism having an edge line aligned with a sub-scanning direction and a bottom facefacing the detection portion, a holderin which the ink cartridge is attachably and detachably installed and that has an opening portionat a position in a bottom portionarranged so as to face the detection portion, the position facing a bottom faceof the prism, and a carriage motorthat relatively moves the holderwith respect to the detection portion in the main scanning direction. The bottom portionof the holderhas, on the side facing the detection portion, an inclined faceinclining in a sub-scanning direction.

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Nagano, Japan

Hidetoshi Yokoyama