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Substrate for printing head, printing head, head cartridge, and printing device

A printing head and substrate technology, which is applied in the fields of head cartridges, printing equipment, printing heads, and printing head substrates, can solve problems such as difficulty in driving heaters at high speed, and achieve the effect of suppressing increase and cost

Inactive Publication Date: 2007-05-09
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage application time in heater driving must be extended to compensate for the voltage drop, which makes it difficult to drive the heater at high speed

Method used

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  • Substrate for printing head, printing head, head cartridge, and printing device
  • Substrate for printing head, printing head, head cartridge, and printing device
  • Substrate for printing head, printing head, head cartridge, and printing device

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Embodiment Construction

[0067] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0068] In this specification, the term "printing" includes not only the formation of meaningful information such as characters and graphics, but also broadly includes the formation of images, diagrams, patterns, etc. on a print medium, or the processing of the medium, whether they are meaningful or not Whether they are visualized as perceptible by human vision.

[0069] Also, the term "printing medium" includes not only paper sheets used in common printing devices, but also broadly ink-receptive materials such as cloth, plastic films, metal plates, glass, ceramics, wood, and leather.

[0070] Furthermore, the term "ink" (hereinafter also referred to as "liquid") should be interpreted in an extended manner, similar to the definition of "printing" described above. That is, "ink" includes a liquid that, when applied to a print medium, can form images, graphi...

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PUM

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Abstract

An object of this invention is to implement higher-quality printing at a higher speed by changing an electric current value to a printing element and adjusting energy applied to the printing element in an inkjet printhead. To achieve this object, a current regulating circuit is arranged on the head substrate of an inkjet printhead of a constant electric current driving type which supplies a constant electric current to a heater. The electric current value is changed in accordance with a signal (digital signal etc.) supplied from the outside of the printhead. Energy corresponding to the electric current value is applied to the printing element from a constant electric current source corresponding to each group.

Description

technical field [0001] The present invention relates to a printhead substrate, a printhead, a head cartridge, and a printing apparatus, and more particularly, to a printhead substrate including a circuit for driving a printing element by sending a predetermined current, the printhead substrate for printing according to an inkjet method, and Involves print heads, head boxes and printing equipment. Background technique [0002] There is conventionally known an ink jet print head (hereinafter referred to as a "print head") that generates thermal energy by sending an electric current to heaters arranged in nozzles, thereby discharging ink. [0003] This print head is a print head using a method of foaming ink near a heater by using the generated thermal energy, and discharging the ink from nozzles for printing. [0004] In order to print at a high speed, it is desirable to simultaneously drive as many heaters (printing elements) installed in the print head as possible in order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/05
Inventor 平山信之
Owner CANON KK