Coordinate input detection device and method for electronic blackboard
Patent 6762747 Issued on July 13, 2004. Estimated Expiration Date: 
September 19, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 19, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectronic board system Electronic whiteboard with multi-functional user interface Coordinate input pen, and electronic board, coordinate input system and electronic board system using the coordinate input pen Device for detecting and inputting a specified position Patent #: 6518959 InventorsAssigneeApplicationNo. 09955643 filed on 09/19/2001US Classes:345/157, Cursor mark position control device250/221Controlled by article, person, or animalExaminersPrimary: Shankar, VijayAssistant: Patel, Nitin Attorney, Agent or FirmForeign Patent References
International ClassG06M 700AbstractAn electronic blackboard displays information and optically detects input information on a display/writing surface by determining the corresponding coordinates. To determine the input coordinates, a predetermined number of pairs of light emitting elements and light detecting elements are placed in parallel for each axis near the edges. The light emitting elements and the light detecting elements are also linearly and equidistantly placed. A control unit is connected to the light emitting elements for sequentially activating these light emitting elements and for controlling the light detecting elements to detect the light in an overlapping manner. Based upon the above positional information from the light detecting elements, an input coordinate determination unit determines the input coordinates of an input on the display/writing surface. | |
