System and method for capturing hand annotations

摘要

A capture device for remote, virtual on screen data input by hand annotation comprises at least three functional layers including a bottom rigid layer, a middle pressure sensor layer and a top flexible layer. The bottom rigid layer has a surface that provides a mechanical support for writing. The middle pressure sensor layer is adapted to measuring a pressure array or map on the capture active area and to send data representing the measured pressure to a personal computer. The top flexible touch-sensitive passive LCD display layer includes an LCD surface by which whatever is written down on the LCD is impressed graphically due to its liquid crystal physical properties wherein applied pressure changes the crystal particles orientation and light properties, such that when a stylus presses against a writing surface thereof, it leaves a visible trace allowing the user to produce a drawing though no real ink has flown.

主权项

1. A capture device for capturing and processing hand annotation data that comprises at least three functional layers including:
(a) a bottom rigid layer having a surface that provides a mechanical support for writing; (b) a top flexible touch sensitive passive LCD display layer including particles which change light properties in response to pressure, to produce an apparent ink display; (c) a middle pressure sensor layer for measuring touch pressure electrically independently from the top flexible touch sensitive passive LCD (d) a processing circuit directly coupled to the middle pressure sensor and configured order to create a pressure array or map of a capture active area indicating location and amount of pressure and to send and process the pressure data as inputs to a personal computer separate from the capture device; and (e) an LCD control configured to erase the apparent ink display of the passive LCD display layer in response to an activate signal.