Canon Kabushiki Kaisha

Souhei Tanaka

Hiroshi Tajika

Noribumi Koitabashi

Hitoshi Sugimoto

Yasuhiro Numata

Yoshiaki Takayanagi

Toru Nakayama

Akira Kuronuma

Hiromitsu Hirabayashi

Takuji Katsu

Yasuhiro Yamada

Miyuki Matsubara

Kazuyoshi Takahashi

Masafumi Wataya

Masayuki Hirose

Nobuhiro Ishizaka

Noriyuki Suzuki

Miyuki Fujita

Tetsushi Kono

Masahiko Watanabe

Takashi Kasahara

Takeaki Nakano

Yoshiyuki Imanaka

Hidehiko Kanda

Haruo Uchida

Takaaki Yamaguchi

Takuya Hatsui

Takahiro Matsui

Souta Takeuchi

Mineo Kaneko

Keiji Tomizawa

Kousuke Kubo

Tetsuya Saito

Yasuo Miyauchi

Masaaki Endo

Hiroshi Uemura

Akinori Horiuchi

Nobuyuki Tsukada

Hiroaki Kitazawa

An apparatus that transfers data to a recording head having a plurality of recording elements includes a transfer unit for transferring recording data to which a series of commands is attached in synchronization with a clock. The series of commands includes a stop command for temporarily stopping transfer of the recording data for a predetermined period in accordance with power-distribution timing of the recording elements.

Data transfer apparatus, recording head, and data transfer method

An object of this invention is to increase the transfer rate of image data from a host computer to a printing apparatus. To achieve this object, a printing apparatus which divides the printing area in the printhead scanning direction into a plurality of regions and prints in each divided region in order to print by scanning the printhead on the printing medium includes a conversion circuit which rearranges image data that is transmitted from the host computer and arranged in a direction perpendicular to the data arrangement of the printhead, into image data in the same horizontal direction as the data arrangement direction of the printhead.

Printing apparatus and printer driver

This invention is directed to provide an inkjet printhead, printing apparatus, and printing method capable of correcting a shift of the printing position caused by variations of the discharge characteristic between nozzles. To accomplish this, the inkjet printhead includes memories which hold block numbers used to time-divisionally drive nozzles. The block numbers are written in consideration of the discharge characteristics of the printhead during the manufacturing process of the printhead. When the inkjet printhead is mounted in the printing apparatus, the printing apparatus reads out block numbers corresponding to respective nozzles from the memories. Based on the numbers, the printing apparatus changes block selection signals for the respective nozzles, and transfers the changed block selection signals to the inkjet printhead to drive it.

Inkjet printhead, printing apparatus, and printing method

A recording apparatus has a buffer for dividing a storage area into a plurality of areas in a scanning direction of a recording head to record data by allowing a carriage loaded with the recording head to scan data on a record medium, and storing the divided image data in a divided area unit, and includes: a write control unit for controlling write address information about image data in the area unit for data of each color for storage of the image data divided in an area unit in the buffer; a read control unit for controlling for data of each color read address information for a read of image data stored in the buffer; and a record data generation unit for generating record data in a unit of the divided area based on the read image data according to the read address information.

Recording apparatus and method for controlling recording apparatus

In a recording apparatus using a recording head which can eject ink droplets having different sizes, a problem in which the recording image quality is decreased or mist is generated when the recording is performed on a predetermined area of a recording medium can be prevented. In the ink droplets having the different sizes, the size of the ink droplet used for the recording is set in accordance with the recording area to perform the recording based on the setting.

Recording apparatus and recording method

A serial type printing apparatus includes: a reception buffer that stores printing data of respective arrays of printing elements subjected to adjustment by a first unit concerning a relative position in a scanning direction among the respective arrays of printing elements and setting data including registration information by a second unit smaller than the first unit concerning the relative position in the scanning direction, the data being transmitted from a host apparatus connected to the printing apparatus; and a print buffer that stores printing data of the respective arrays of printing elements in association with printing positions in the scanning direction. The printing apparatus performs control to adjust storing locations of the printing data of the respective arrays of printing elements by the second unit on the basis of the registration information and store the printing data in the print buffer. Consequently, it is possible to reduce a buffer size of the printing apparatus and improve an actual printing speed from instruction of printing until the printing is actually started.

Printing apparatus, data processing method for printing apparatus, and printing system

In a printing apparatus including a reception buffer which stores setting data and printing data of printing element arrays transmitted from a connected host device, and a printing buffer which stores the printing data of the printing element arrays in association with printing positions in a scanning direction, the printing data are controlled to be stored in the printing buffer by adjusting the storage positions of the printing data of the printing element arrays on the basis of registration information which is contained in the setting data and corresponds to the relative distance between the printing element arrays in the scanning direction. Read address information for reading out the printing data stored in the printing buffer is controlled for each printing element array. Printing is performed by driving each printing element array in accordance with the printing data read out on the basis of the read address information. The printing apparatus executes a registration adjustment process associated with the relative distance between the printing element arrays that has conventionally been done in a host device, simplifying a printing data generation process by the host device.

Replacement of a recording head on a recording apparatus is detected on the basis of a serial number allocated to each recording head. The recording head also carries head characteristic information such as color information, shading information and so forth. When the recording head is replaced with a new one, the head characteristic information of the newly mounted recording head is automatically stored, so that head driving conditions are automatically determined to optimize the recording conditions without requiring any manual adjustment. Recovery operation is automatically executed when replacement of the recording head is detected, so that required recording conditions are recovered without manual instructions.

Ink jet recording apparatus and method using replaceable recording heads

In a connection status output circuit for confirming the connection status with a recording apparatus via connecting terminals corresponding respectively to recording signal DATA, clock signal CLK for transferring the recording signal, and control signals LT and HE for controlling a recording operation according to the recording signal, the signals being received from the recording apparatus, when the connection status is confirmed, a signal designating the connection status is outputted, and when a recording operation is performed, the output signal does not change.

Recording head, head cartridge and recording apparatus

A recording apparatus for recording with use of a recording head having two nozzle arrays arranged side-by-side includes first, second, and third direct memory access (DMA) units, a data converter unit for converting first image data stored in a work buffer into second image data, a record buffer unit for storing the second image data, a latch unit for storing the second image data in a transfer buffer, a buffer reading control table unit, and a DMA control unit for causing transfer processing to be executed by the first, second, and third DMA units based on a flag in the buffer reading control table unit when the image data stored in the work buffer is transferred to the transfer buffer.

Ink jet recording apparatus and control method therefor

To reduce the data processing load on a recording apparatus, an information processing apparatus and the recording apparatus cooperate to correct registration errors. The information processing apparatus divides a recording area of the recording apparatus into a plurality of partial areas and makes a first correction on a recording position of image data for each partial area; the correction is made for color data items and in pixels. The information processing apparatus generates image data that conforms to the corrected recording position, as well as setting information for controlling the recording apparatus to record the image data. The recording apparatus makes a second correction on the recording position of the image data in fractions of a pixel based on the setting information generated by the information processing apparatus and controls recording of the image data based on the corrected recording position.

Image formation system, recording apparatus, and recording control method

Image data developed on print buffers can be read at consecutive or adjacent addresses and transferred to recording heads at high speed. An I/F DMA block transfers image data to DRAM at discrete addresses to develop the image data on DRAM. Thereafter, a head DMA block reads the image data in DRAM at addresses consecutive in a mount direction of the recording heads and transfers the read image data to the recording heads.

Record control apparatus and recording apparatus

Growing community of inventors

Kanagawa, Japan

Souhei Tanaka