Patent ID: 9262004
Filing Date: 2016-02-16
CPC Classification: G02F,G06F

Claim Text:
1. An overlay for covering the writing surface of an electronic writing tablet, the overlay comprising: a) an LCD touch screen having an upper surface and a lower surface, the LCD touch screen being adapted to (i) initially display an image drawn or written upon the upper surface by application of pressure on the upper surface without requiring a transfer of matter to the upper surface and (ii) continue display of the image without the consumption of electrical power; b) a source of electrical power for powering the LCD touch screen; c) a reversible attaching mechanism for reversibly attaching the LCD touch screen over the writing surface of the writing tablet; and d) an auto-erase mechanism capable of directly sensing pressure applied to the upper surface of the LCD touch screen and adapted to erase an image displayed on the LCD touch screen after the passage of a predetermined period of time when a pressure sensing layer directly senses no pressure applied to the upper surface of the LCD touch screen.