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:
Apr. 13, 2004
Filed:
Feb. 07, 2003
Hung-Lieh Hu, Hsinchu, TW;
Chi-Lung Li, Hsinchu, TW;
Jack Wu, Hsinchu, TW;
Chieh-Wen Wang, Hsinchu, TW;
International United Technology Co., Ltd., Hsinchu, TW;
Abstract
The present invention provides an ink jet printhead identification circuit and method. The identification circuit is constructed of a fuse and other electronic components. A plurality of circuits are arranged and integrated on the printhead of the cartridge and encoded prior to leaving the factory subjecting the identification and detection circuits to achieve its identification purpose (of identifying general information of the cartridge, such as model number, serial number, color or gray-scale setting, and best printing quality). The circuits may alternatively be encoded subsequent to leaving the factory and usage to a certain state subjecting the identification circuits to achieve its detection purpose (of detecting the current status of the cartridge, such as whether its lifespan has elapsed).