Touch controlled zoom of waveform displays

Details Touch controlled zoom of waveform displays Touch controlled zoom of waveform displays

G - Physics

06

F

375/33

G06F 3/023 (2006.01) G01R 13/20 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1310772

- 8 - Abstract of the Disclosure Touch 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.

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