Liquid crystal eWriter system with resistive digitizer and having mechanical palm rejection

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10649261
APP PUB NO 20180031886A1
SERIAL NO

15665924

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Importance

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Abstract

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A liquid crystal eWriter system with a resistive digitizer and having palm rejection includes the following features. An eWriter includes eWriter substrates that are spaced apart from each other, an upper one of the eWriter substrates being formed of a flexible, clear polymeric material and a lower one of the eWriter substrates being formed of a flexible polymeric material. Electrically conductive layers are spaced apart from each other and located between the eWriter substrates. A dispersion layer including a dispersion of cholesteric liquid crystal material and polymer is disposed between the electrically conductive layers. Pressure applied to the eWriter changes a reflectance of the cholesteric liquid crystal material forming an image. A resistive digitizer determines a location of the pressure applied to the eWriter. The system is designed so that the resistive digitizer detects fingernail or stylus input with substantially no lightly written stroke loss but detects substantially no palm input, under ordinary writing conditions.

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Patent Owner(s)

Patent OwnerAddress
KENT DISPLAYS INC343 PORTAGE BLVD KENT OH 44240

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khan, Asad A Kent, US 22 650
Lightfoot, Mark Sterling, US 6 23
Marhefka, Duane Winona, US 9 118
Montbach, Erica N Kent, US 18 403

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