Touch controlled zoom of waveform displays
Patent 4755811 Issued on July 5, 1988. Estimated Expiration Date: 
March 24, 2007. 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.
March 24, 2007. 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 ReferencesMethod for dynamically viewing image elements stored in a random access memory array True zoom of a displayed image Local zoom for raster scan displays Patent #: 4546349 InventorsAssigneeApplicationNo. 07/030758 filed on 03/24/1987US Classes:345/668, By arbitrary ratio324/121R, Cathode ray (e.g., magic eye)345/173Touch panelExaminersPrimary: Birmiel, Howard A.Attorney, Agent or FirmInternational ClassesG06F 3/033 (20060101)G01R 13/20 (20060101) AbstractTouch controlled zoom of a waveform display uses a touch screen for the display surface. Function buttons for moving or expanding the waveform display and for determining the axis of such movement or expansion operate in conjunction with a rotary encoder. Expansion, or zoom, is accomplished by contacting the screen overlying a point on the waveform about which zoom is desired. Such contact or activation of the expand function button results in movement of the rotary encoder providing a gain parameter to a zoom function. The zoom function operates on the waveform display in an exponential manner as a function of the gain parameter to expand or contract the waveform display about the zoom point according to the direction of rotation of the rotary encoder. | |
