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:
Aug. 09, 2022
Filed:
Nov. 13, 2020
Alpine Electronics, Inc., Tokyo, JP;
Tomoaki Waragai, Iwaki, JP;
ALPINE ELECTRONICS, INC., Tokyo, JP;
Abstract
A liquid crystal display device includes: a first electrode layer provided on a display surface side to prevent noise from being emitted from a display element to the outside; a second electrode layer provided outside the first electrode layer to perform position detection; a hover signal generation unit that generates a detection signal to be input to the second electrode layer and the first electrode layer for detection of an indicator approaching the display surface; a common electrode that applies a common voltage to derive the display element; a cancellation signal generation unit that generates a cancellation signal which cancels a signal component leaking from the first electrode layer to the common electrode; and a voltage addition unit that superimposes a cancellation signal on the common voltage.