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. 22, 2001
Filed:
Dec. 21, 1998
Mitsuhiro Watanabe, Tokyo, JP;
NEC Corporation, , JP;
Abstract
In a liquid crystal display apparatus, sampling of an A-D converter for the purpose of capturing data from a touch panel is performed at a rate that is unrelated to the AC signal applied to the LCD, and data from the touch panel is captured in a regular manner in accordance with the sampling rate of the A-D converter. An added circuit detects the transformation points of the LCD AC signal and, based on a transformation point detection signal that is output by this circuit, data of the touch panel data sampled by the A-D converter that is affected by LCD noise is discarded, so that only data not affected by LCD noise is sent to a main memory.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile