Device for detecting the position of a control member on a touch-sensitive pad
First Claim
1. A device for detecting the position of a control member on a touch-sensitive pad comprising a series of detection areas, an analog circuit for attributing a detection coefficient to each area, which coefficient is a function of the amplitude of a signal emitted by said analog circuit, said amplitude being itself a function of the degree to which the detection area is overlapped by the control member, means for selecting detection areas having a high degree of overlap amongst all of the detection areas, means for attributing an origin to one of the areas having a high degree of overlap and means for determining a median point of said detection areas having a high degree of overlap as weighted by their detection coefficient.
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Abstract
The device in accordance with the invention includes a series of detection areas (2) on the touch-sensitive pad, an analog circuit for applying a detection coefficient to each detection area (2), which coefficient corresponds to the degree the detection area is overlapped by the control member, and determines a median point of the detection areas as weighted by their respective detection coefficients.
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Citations
4 Claims
- 1. A device for detecting the position of a control member on a touch-sensitive pad comprising a series of detection areas, an analog circuit for attributing a detection coefficient to each area, which coefficient is a function of the amplitude of a signal emitted by said analog circuit, said amplitude being itself a function of the degree to which the detection area is overlapped by the control member, means for selecting detection areas having a high degree of overlap amongst all of the detection areas, means for attributing an origin to one of the areas having a high degree of overlap and means for determining a median point of said detection areas having a high degree of overlap as weighted by their detection coefficient.
Specification