Canon Kabushiki Kaisha

Akira Nagatomo

Hiroshi Tajika

Hiroyuki Ishinaga

Toshio Kashino

Tsutomu Abe

Kenjiro Watanabe

Yoshifumi Hattori

Yoshie Asakawa

Isao Ebisawa

Shinya Matsui

Hiroshi Iida

Takashi Ohba

Tetsushi Kohno

Mikio Shiga

Yoshiaki Takayanagi

Asao Saito

Akira Kuronuma

Takayuki Murata

Shinichi Omo

Ryoichi Koizumi

Hiroshi Fukui

Hiroshi Kyogoku

Takatoshi Ohta

Wataru Sakagami

Shigemitsu Tasaki

Shigeru Tsuyukubo

Liquid ejecting head and head cartridge capable of adjusting energy supplied thereto, liquid ejecting device provided with the head and head cartridge, and recording system

A method for standardizing an ink jet recording head is arranged to be capable of utilizing the characteristics of each of recording heads to the maximum, while maintaining the compatibility between them. Particularly, the compatibility is maintained between the novel type recording head whose interior is partitioned into two layers through movable members, and a conventional type recording head. When the conventional type recording head is mounted on a novel type recording apparatus, all the requirements are handled by the novel type recording apparatus side to drive the conventional type recording head under a condition regulated for the conventional type recording head. When the novel type recording head is mounted on a conventional type recording apparatus, it is driven within the capacity of performance of the conventional type recording apparatus. A discriminator for discriminating the kind of mounted recording head is provided for each of the recording apparatuses. In this way, various control operations are attained. When the structure is arranged to use separate recording heads and ink tanks, the compatibility is maintained, while utilizing the difference in characteristics of the novel type recording head and ink, and those of the conventional type recording head and ink to the maximum by means of discriminating one kind of ink from another.

Method for standardizing an ink jet recording head and an ink jet

An ink jet printing apparatus has a discharge recovery system that controls the amount of ink suction in a discharge recovery operation on the basis of a property of the ink in a cartridge mounted on the apparatus. The discharge recovery operation can also be controlled when the power to the apparatus is turned on if a cartridge has been replaced or mounted while the power is off.

Controlling a discharge recovery operation according to a condition

A liquid-discharge recording apparatus such as an ink-jet printer comprises: a liquid-discharge recording unit having an emission energy generating device including an electrothermal energy converting device which can heat a recording liquid such as an ink to form liquid droplets in response to an electrical signal, in which this recording unit emits the liquid droplets and deposits them on a recording paper and thereby recording thereon; a recording unit control circuit which can set and supplies the electrical signal to form the liquid droplets to the emission energy generating device in response to a recording signal; and an emission controller for setting the electrical signal to form the liquid droplets to the recording unit control circuit when a power supply is turned on, thereby allowing the recording unit to and emit the liquid droplets in accordance with an environmental condition such as a temperature of the recording liquid. With this dedicated emission controller, the proper emission condition is set and preheating processes and preliminary emitting processes are executed prior to starting the printing after the turn-on of the power supply of the printer, so that the printing state can be promptly and easily optimized by a simple software.

Liquid discharge recording apparatus having apparatus for effecting

In order to prevent change in the properties of recording liquid such as surface tension, viscosity, etc. a recording head is provided with an integral temperature sensor. The temperature controlling operation is performed in response to an output of the temperature sensor to maintain the recording liquid within a predetermined temperature range. In order to correct the variation in the properties of the individual temperature sensors, the main apparatus contains a reference temperature sensor. The temperature sensor of the recording head is corrected in its output on the basis of comparison between the temperature sensors. The recording head is provided with information representative of a property of the temperature sensor of the recording head. By the mounting of the recording head into the apparatus, the information is read, and the output of the temperature sensor is corrected on the basis of the read information.

Liquid jet recording apparatus

A video data processing system includes a CPU, a video memory, video data shift registers, a ternary counter, an octal counter, a blanking counter, and a flip-flop. Video data is shifted in the shift registers in response to an output from the ternary counter. The outputs from the ternary counter are counted by the octal counter, and an output from the octal counter is counted by the blanking counter so as to count down a blanking parameter. A borrow output from the blanking sets the flip-flop to hold video data which is then stored in the video memory. This operation is repeated up to the last H along the main scanning direction. The initial value of the blanking parameter is incremented by one by one to repeat main scanning inputs along a subscanning direction.

Video data processing system

A recorder comprises an input port for inputting a data, an output unit for outputting data of different formats supplied from the input port as dot matrix data of identical format, and a dot matrix record unit for recording the data supplied by the output unit.

Recorder and dot pattern control circuit

A liquid-discharge recording apparatus such as an ink-jet printer comprises: a liquid-discharge recording unit having an emission energy generating device including an electrothermal energy converting device which can heat a recording liquid such as an ink to form liquid droplets in response to an electrical signal, in which this recording unit emits the liquid droplets and deposits them on a recording paper and thereby recording thereon; a recording unit control circuit which can set and supplies the electrical signal to form the liquid droplets to the emission energy generating device in response to a recording signal; and an emission controller for setting the electrical signal to form the liquid droplets to the recording unit control circuit when a power supply is turned on, thereby allowing the recording unit to emit the liquid droplets in accordance with an environmental condition such as a temperature of the recording liquid. With this dedicated emission controller, the proper emission condition is set and the preheating processes and preliminary emitting processes are executed prior to starting the printing after the turn-on of the power supply of the printer, so that the printing state can be promptly and easily optimized by a simple software.

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Yokohama, Japan

Akira Nagatomo