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:
Sep. 16, 2003
Filed:
Sep. 07, 2001
Junhua Chang, Nagano-Ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A driving signal generation unit generates a plurality of kinds of driving pulses and a minute vibration pulse to be applied to a pressure generation element so as to finely vibrate a meniscus of liquid. A pulse generation unit generates the minute vibration pulse and the driving pulses by selecting a part of the driving signal. The driving signal includes a plurality of waveform elements used to generate the driving pulses and a connection element used to connect the waveform elements between different voltage levels and not used to generate the driving pulses. The pulse generation unit generates the minute vibration pulse by a combination of at least a part of the waveform elements and at least a part of the connection element. A plurality of driving pulses for ejecting a plurality of kinds of ink drops and a minute vibration pulse for causing minute vibrations to a meniscus of liquid can be efficiently put in a driving signal of one driving period.