Position pointing device, system and method employing AC field
February 3, 2015. 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 References Re33805 Re33894 Re34835 Position determination apparatus Input integrated flat panel display system Image processing device Electronic blackboard and accessories such as writing tools Electronic blackboard system marker and eraser therefor Method for forming color images, using a hue-plus-gray color model and error diffusion Architecture for communication of remote devices to a digitizing display InventorsAssigneeApplicationNo. 384557 filed on 02/03/1995US Classes:178/19.07MultifrequencyExaminersPrimary: Chin, WellingtonAssistant: Shankar, Vijay Attorney, Agent or FirmForeign Patent References
International ClassG09G 003/02Foreign Application Priority Data1994-02-10 JPAbstractDetailed information about plural factors determining a color and the coordinate value of a pointed position are determined from a position pointing device. The detailed information about the plural colors is by factors such as detailed gradation information on basic colors such as red, green, and blue. The amplitude or frequency of an AC field is controlled in accordance with the set color information. The AC field has a spatial distribution corresponding to the coordinate value of the pointed position. | |
