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. 11, 1999
Filed:
Jun. 19, 1996
Young-Bok Ju, Seongnam, KR;
Jae-Han Lee, Kyungki-do, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
An ink cartridge detection circuit and method for detecting whether an ink cartridge is mounted in an ink jet recording apparatus. The ink cartridge circuit includes a driver for driving a corresponding nozzle by applying a driving power supply voltage to a corresponding heating element; a voltage detector connected to the heating elements for detecting a voltage level of the driving power supply voltage dropped by means of driving of the heating elements; and a controller for driving one or more of the heating elements through the driver and for comparing a voltage level detected by the voltage detector with a preset reference voltage level in order to detect whether an ink cartridge is mounted on a carriage of the ink jet recording apparatus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile