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:
Mar. 13, 2007
Filed:
Jun. 17, 2004
Jessen Chen, Hsinchu, TW;
Yu-chu Huang, Hsinchu, TW;
Jane Chang, Hsinchu, TW;
Hsiang-pei Ou, Hsinchu, TW;
Jessen Chen, Hsinchu, TW;
Yu-Chu Huang, Hsinchu, TW;
Jane Chang, Hsinchu, TW;
Hsiang-Pei Ou, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A circuit and a method of estimating pulse frequencies of nozzles in an ink-jet head use a new mechanism of estimating pulse frequencies of nozzles instead of in a conventional counting mechanism. The circuit includes a DRAM, an adder and a method control mechanism. The method control mechanism controls the access method. The DRAM retrieves a plurality of pulse frequency parameters of nozzles after ink-jet cycle signals are received. The adder adds the parameters and weighted values to update pulse frequency parameters. The updated parameters are saved back to the DRAM.