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:
Jan. 20, 2004
Filed:
Feb. 11, 2002
Ben-Chuan Du, Shindian, TW;
Yung-Yi Li, Yungkang, TW;
Benq Corporation, Taoyuan, TW;
Abstract
A method of performing printhead maintenance comprises the steps as follow. First, the orifices of the printhead are defined to form a plurality of orifice groups. Then, a test graph comprising a plurality of test lines associated with the orifice groups is provided, and the ink is ejected through the printhead to obtain a printing result of the test graph. Next, the orifice groups containing the clogged orifices are selected according to the printing result. Then the orifice groups to be cleaned undergo the maintenance procedure. In the present invention, the orifice groups to be cleaned are determined by comparing the printing result and the test graph. Then the maintenance procedure can be selected to purge only the orifice groups containing clogged orifices, so that the unnecessary consumption of ink in purging unclogged orifices is reduced.