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Apparatus and method of detecting abnormal condition of printhead

A technology of abnormal state and printing head, which is applied in the direction of printing device, printing, measuring device, etc., which can solve the problems of increased manufacturing cost, time-consuming and inconvenient detection

Inactive Publication Date: 2007-03-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] However, since the conventional equipment is provided with additional devices such as a power driver and a voltage comparator for supplying additional test power to detect an abnormal state of the print head, the manufacturing cost increases
In addition, since the driving power supplied to the print head must be cut off, it becomes time-consuming and inconvenient for the user to detect

Method used

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  • Apparatus and method of detecting abnormal condition of printhead
  • Apparatus and method of detecting abnormal condition of printhead
  • Apparatus and method of detecting abnormal condition of printhead

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Embodiment Construction

[0035] Reference will be made in detail to the embodiments of the present general inventive concept, examples of which are illustrated in the drawings, and like reference numerals refer to like constituent parts throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.

[0036] FIG. 2 is a block diagram illustrating an apparatus for detecting an abnormal state of a printhead according to an embodiment of the present general inventive concept. Referring to FIG. The apparatus of FIG. 2 may be used with a printhead 220 and / or an imaging apparatus including a heater 221 or a piezoelectric device as a drive source to eject ink through the nozzles and a second switch 222 to control the operation of the heater 221, which includes a power supply Unit 200 , voltage stabilization unit 210 , print head 220 , voltage measurement unit 230 , voltage comparison unit 240 , time measurement unit 250 , time comparison ...

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Abstract

An apparatus and method of detecting an abnormal condition of a printhead includes a voltage stabilizing unit to stabilize a voltage of a power supplied to the printhead, a voltage measuring unit to measure the stabilized voltage, and an abnormal condition detecting unit to compare the measured voltage in a predetermined time and a critical voltage to detect an abnormal condition of the printhead.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2005-0087858 filed with the Korean Intellectual Property Office on September 21, 2005, the disclosure of which is incorporated herein by reference. technical field [0003] The present general inventive concept relates to an image forming apparatus, and in particular, to an apparatus and method for detecting an abnormal state of a print head in a full-page width printer using a charging time or a discharging time of a capacitor stabilizing a power supply unit that supplies power to the print head. Voltage. Background technique [0004] Generally, to detect an abnormal state of the conventional printhead shown in FIG. 1, test power is supplied via a resistor using a connection line originally used to supply power to the printhead, and a voltage distributed by the resistor is compared with a standard voltage. [0005] For this purpose, the drive powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J29/393G01R19/165
CPCB41J29/393B41J2/0451B41J2/0457B41J2/155
Inventor 金政焕
Owner SAMSUNG ELECTRONICS CO LTD
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