Liquid crystal display device to improve display quality during hover operation

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United States of America Patent

PATENT NO 11409394
APP PUB NO 20210191178A1
SERIAL NO

17097552

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Abstract

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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.

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Patent Owner(s)

  • ALPINE ELECTRONICS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Waragai, Tomoaki Iwaki, JP 1 1

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