Touch controlled zoom of waveform displays

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

1987-03-24

1988-07-05

Birmiel, Howard A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340709, 340721, 324121R, G09G 116, G06F 314

Patent

active

047558113

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.

REFERENCES:
patent: 4197590 (1980-04-01), Sukonick et al.
patent: 4532605 (1985-07-01), Waller
patent: 4546349 (1985-10-01), Prohofsky et al.

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