发明名称 |
TOUCH CONTROLLED ZOOM OF WAVEFORM DISPLAYS |
摘要 |
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. |
申请公布号 |
CA1310772(C) |
申请公布日期 |
1992.11.24 |
申请号 |
CA19880560106 |
申请日期 |
1988.02.29 |
申请人 |
TEKTRONIX, INC. |
发明人 |
SLAVIN, KEITH R.;CRAIG, DONALD |
分类号 |
G01D7/00;G01R13/20;G06F3/033 |
主分类号 |
G01D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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