Handwriting input device

摘要

This handwriting input device is equipped with an object to be coated 101, a detection means 102, and a display means 103. The object to be coated 101 is transparent or translucent. When a letter or a figure is written or drawn with a coating material, the detection means 102 detects a position in which the coating material attaches on the object to be coated 101. The display means 103 causes a visual change in accordance with the position in which attachment of the coating material is detected by the detection means 102, thereby displaying the letter or figure written or drawn with the coating material.

主权项

1. A handwriting input device comprising:
a transparent or translucent object to be coated capable of guiding non-visible light therewithin by total internal reflection; a light source part configured to emit non-visible light which is incident into the object to be coated and is guided therewithin by total internal reflection; a detection unit configured to periodically optically detect an area of the object to be coated on which a coating material has been deposited by distinguishing non-visible light transmitted from the object to be coated and through the coating material due to an optical coupling between the object to be coated and the coating material, the optical coupling thereby destroying the total internal reflection and transmitting the non-visible light through the coating material; and a display unit configured to periodically cause a visual change in a visible image in accordance with the detection of the area of the object to be coated on which the coating material has been deposited, wherein the coating material is physically removable from the object to be coated, and the display unit is further configured to change the visible image based on a removal of the coating material.