The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2006
Filed:
Nov. 20, 2002
Kyung-chool Choi, Suwon, KR;
Kyung-chool Choi, Suwon, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
An inkjet printer checks whether each nozzle on a printing head is normal, and upon receipt of a nozzle checking command for a nozzle of a printing head through an inputting unit, cuts off a first driving power supply provided during a normal operation and drives in sequence a plurality of nozzle driving units using a second driving power supply. Through such operation, the inkjet printer determines a state of each nozzle driving unit in accordance with an output signal from a comparator comparing a voltage level during driving of each nozzle driving unit with a reference voltage, and then stores a nozzle number corresponding to the nozzle driving unit whose failure is detected. Upon completion of checking for each nozzle driving unit, the stored nozzle number representing an abnormal nozzle is displayed on a display. Therefore, it is possible for a user to check an abnormal state of the nozzle driving unit and to recognize exactly reasons for an improper dot formation on a printing medium, whereby ink consumption due to unnecessary spitting is prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile