Variable speed, image pan method and apparatus
June 16, 2009. 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 ReferencesRaster scan display apparatus for dynamically viewing image elements stored in a random access memory array Real time toroidal pan Cursor control device Graphics display system with viewports of arbitrary location and content Opto-mechanical cursor positioning device Graphic display unit Window view control Display method and apparatus employing cursor panning Position control apparatus Display apparatus which can scroll displayed data with regard to cursor position InventorApplicationNo. 367172 filed on 06/16/1989US Classes:345/163, Mouse345/168, Including keyboard345/684, Scrolling715/856CursorExaminersPrimary: Oberley, Alvin E.Assistant: Saras, Steven Attorney, Agent or FirmInternational ClassesG09G 001/00G09G 001/16 G09G 001/06 AbstractA display apparatus is described having the capability to pan a viewport image across a world-plane image. The viewport image has defined boundaries and exhibits a cursor whose position is movable by a user operated mouse or keyboard controls. The invention comprises a method for providing a variable-rate pan action of the viewport image which includes panning the viewport image at a preset rate in the direction of a first viewport boundary, if the cursor has been moved to the first boundary. The viewport image is panned at a proportionally faster rate in the direction of the first viewport boundary, as the cursor is moved further beyond the first viewport boundary thus enabling a variable speed pan under user control. | |
