| 摘要 |
<p>PURPOSE: A microstructure optical film is provided to allow an electronic pen to recognize position information of a surface by forming an encoding pattern on the surface. CONSTITUTION: A surface of a microstructure optical film includes marks(120) which indicate position information. The mark comprises microstructures(110) and executes an optical reflection process sensed by an optical device. The microstructure is shaped into a quadrangular pyramid shape, a cylinder shape, or a wedge shape. Mark values include two different values and are determined according to a position formed around a contact point of a virtual grid line. An infrared reflection layer(130) reflects infrared rays, transmits a visible ray, and is included at a lower end unit of the microstructure optical film.</p> |
