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

A liquid crystal eWriter system with a resistive digitizer and having palm rejection, comprising:

• an eWriter including a writing surface, eWriter substrates spaced apart from each other, an upper one of said eWriter substrates being formed of a flexible, clear polymeric material and a lower one of said eWriter substrates being formed of a flexible polymeric material, electrically conductive layers spaced apart from each other and located between said eWriter substrates, a dispersion layer including a dispersion of cholesteric liquid crystal material and polymer disposed between said electrically conductive layers, wherein pressure applied to said writing surface by a user changes a reflectance of said cholesteric liquid crystal material forming an image;
• and
• a resistive digitizer disposed more distal from the user than said eWriter is from the user, wherein said resistive digitizer determines a location of the pressure applied to said writing surface;
• wherein said liquid crystal eWriter system includes a minimum Stylus Activation Force in the range of 0.02N to 0.4N and a Palm Activation Force that is ≥2.5N providing palm rejection.

An optically clear liquid crystal eWriter system with a resistive digitizer and having palm rejection, comprising:

• an eWriter including a writing surface, eWriter substrates spaced apart from each other, an upper one of said eWriter substrates being formed of a flexible, optically clear polymeric material and a lower one of said eWriter substrates being formed of a flexible, optically clear polymeric material, optically clear electrically conductive layers spaced apart from each other and located between said eWriter substrates, a dispersion layer including a dispersion of cholesteric liquid crystal material and polymer disposed between said electrically conductive layers, wherein pressure applied to said writing surface by a user changes a reflectance of said cholesteric liquid crystal material forming an image;
• a semitransparent back layer disposed below a lower one of said electrically conductive layers, wherein said semitransparent back layer absorbs light that passes through said dispersion layer, reflects grey light or light of a color and is light transmitting;
• and
• an optically clear resistive digitizer that determines a location of the pressure applied to said writing surface;
• wherein said liquid crystal eWriter system is constructed and arranged such that said resistive digitizer detects fingernail or stylus input with substantially no lightly written stroke loss but detects substantially no palm input, under ordinary writing conditions.

A liquid crystal eWriter system with a resistive digitizer and having palm rejection, comprising:

• a battery for powering said liquid crystal eWriter system;
• a memory storage device included in said liquid crystal eWriter system;
• an eWriter including a writing surface, eWriter substrates spaced apart from each other, an upper one of said eWriter substrates being formed of a flexible, clear polymeric material and a lower one of said eWriter substrates being formed of a flexible, polymeric material, electrically conductive layers spaced apart from each other and located between said eWriter substrates, a dispersion layer including a dispersion of cholesteric liquid crystal material and polymer disposed between said electrically conductive layers, wherein pressure applied to said writing surface by a user changes a reflectance of said cholesteric liquid crystal material forming an image;
• a resistive digitizer disposed more distal from the user than said eWriter is from the user, wherein said resistive digitizer determines a location of the pressure applied to said writing surface;
• and
• a processor configured to execute software for converting said location of the pressure applied to said writing surface into image data and for storing said image data in said memory storage device;
• wherein said liquid crystal eWriter system includes a Stylus Activation Force in the range of 0.02N to 0.4N and a Palm Activation Force that is ≥2.5N providing palm rejection.

A liquid crystal eWriter system with a resistive digitizer and having palm rejection and providing streaming data, comprising:

• a battery for powering said liquid crystal eWriter system;
• an eWriter including a writing surface, eWriter substrates spaced apart from each other, an upper one of said eWriter substrates being formed of a flexible, optically clear polymeric material and a lower one of said eWriter substrates being formed of a flexible polymeric material, electrically conductive layers spaced apart from each other and located between said eWriter substrates, a dispersion layer including a dispersion of cholesteric liquid crystal material and polymer disposed between said electrically conductive layers, wherein pressure applied to said writing surface by a user changes a reflectance of said cholesteric liquid crystal material forming an image;
• a resistive digitizer disposed more distal from the user than said eWriter is from the user, wherein said resistive digitizer determines a location of the pressure applied to said writing surface;
• a data interface adapted to connect said liquid crystal eWriter system to an external device and also adapted to transmit data to said external device;
• a processor configured to execute software for converting said location of the pressure applied to said writing surface into coordinate data and to stream said coordinate data over said data interface to said external device in real time or near real time for reproducing on said external device the image formed on said eWriter;
• wherein said liquid crystal eWriter system includes a Stylus Activation Force in the range of 0.02N to 0.4N and a Palm Activation Force that is ≥2.5N providing palm rejection.