Touch controlled zoom of waveform displays
First Claim
1. An apparatus for controlling zoom of a displayed waveform comprising:
- means for indicating a point on the displayed waveform about which zoom is desired; and
means for zooming the displayed waveform about the indicated point so that the indicated point remains stationary.
1 Assignment
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Accused Products
Abstract
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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Citations
6 Claims
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1. An apparatus for controlling zoom of a displayed waveform comprising:
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means for indicating a point on the displayed waveform about which zoom is desired; and means for zooming the displayed waveform about the indicated point so that the indicated point remains stationary. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification