Seiko Epson Corporation

Masahiro Kimura

Yasunori Fukumitsu

Masahiro Igarashi

Yasuhisa Yamamoto

Tomoyuki Mokuo

Keiichiro Fukumasu

Sota Ishibashi

Yasuki Nogami

Takashi Akase

An image reading apparatus includes a first posture detection unit that detects a first posture that is a posture of the apparatus main body when not in use, a second posture detection unit that detects a second posture that is a posture of the apparatus main body when in use, and a posture change detection unit that detects a change in a posture of the apparatus main body. When the first posture detection unit detects a switchover of the apparatus main body to the first posture in a first power supply mode in which power is supplied to the first posture detection unit, the second posture detection unit, and the posture change detection unit, the first power supply mode transitions to the second power supply mode in which a controller supplies power to only the posture change detection unit.

Image reading apparatus with rotatable main body

Image reading apparatus

If data, which is irrelevant to recording data, is stored in a lower address of head word data of the run length compressed recording data stored in a receiving buffer unit, the irrelevant byte data of the lower address of the word data including the head byte data is nullified by masking to be developed by a decode circuit. Otherwise, in regard to a bitmap area of a local memory which is a DMA transfer destination, transfer addresses are individually set by a development processing controller in a DECU per one word of the developed recording data stored in the line buffer in order that data of one line is arranged and stored in a vertical direction, or data of one line is stored in imageand imagein turn. Otherwise, in regard to the development processing controller, when the recording data developed by the decode circuit is stored in the line buffer, it is stored from a first byte in a state where a 0-th byte of the line buffer is vacant.

Data transferring apparatus for transferring liquid ejection data and a liquid ejecting apparatus

A liquid ejection head is caused to eject liquid droplets at a region where no target medium is placed, such that such that a first prescribed number of liquid droplets are flushed from each of the nozzle orifices in the nozzle arrays of the first group, and a second prescribed number of liquid droplets are flushed from each of the nozzle orifices in the nozzle arrays of the second group. At least a part of the first prescribed number of liquid droplets and at least a part of the second prescribed number of liquid droplets are flushed by alternately performing a first unit operation for flushing a third prescribed number of liquid droplets which is smaller than the first prescribed number and a second unit operation for flushing a fourth prescribed number of liquid droplets which is smaller than the second prescribed number.

Liquid ejection apparatus and method of controlling the same

A data transferring apparatus for transferring liquid ejection data has a decoding unit having a decode circuit, which can perform hardware development on liquid ejection data, a line buffer for storing the liquid ejection data developed by a word unit and a compressed data inputting unit for transferring the liquid ejection data from an external part to the decode circuit.

Record controlling data received by an interface unit is transferred to a change controlling block, and transferred to a head analyzing block so that analysis of its head can be performed. In case the data following the head is a command, it is stored in a command storing register, and in case of compressed recording data, it is transferred to a data transfer controlling block. A MPU accesses the command storing register to analyze the command. The compressed recording data is stored in a FIFO memory via a first dedicated bus from the data transfer controlling block, and transferred to a DECU via a second dedicated bus.

Data transferring apparatus for transferring liquid ejection data and a liquid ejecting apparatus including a header analyzing unit that analyzes a header of liquid ejection controlling data

A data transferring apparatus has an ASIC (Application Specific Integrated Circuit), and the ASIC incorporates an interface unit, a head controlling unit, a receiving buffer unit and a DECU, which are coupled to be capable of transferring data. The DECU incorporates a development processing controller having a decode circuit for performing hardware development on compressed recording data, and a line buffer storing developed recording data. The DECU and the head controlling unit are coupled by an internal bus IB in order to perform data transfer.

Compressed recording data is DMA-transferred to a receiving buffer unit via a system bus one word each. It is DMA-transferred from the receiving buffer unit to a DECU via the system bus. It is developed based on hardware by a decode circuit in the DECU, and stored in a line buffer. It is DMA-transferred to a local memory via a local bus when it reaches predetermined bytes. The recording data stored in the local memory is DMA-transferred to the DECU via the local bus, DMA-transferred to a head controlling unit and DMA-transferred to a recording head.

System and method for DMA data transferring apparatus and liquid ejection apparatus

In a cleaning controller for a recording head of a recorder connected to an external device, a timer acquires a first time value indicating a current time from the external device, and performs cyclic clocking in which a first predetermined time period is repetitively clocked from a predetermined time point. A nonvolatile storage medium stores a second time value indicating a time at which a cleaning operation is lastly performed. A determinant compares the first and the second time values to obtain a third time value, and determines whether a cleaning operation is necessary to be performed based on the third time value. A cleaner performs a cleaning operation of the recording head based on the result determined by the determinant.

Growing community of inventors

Nagano-ken, Japan

Masahiro Kimura