Touch detection for a digitizer
AssigneeN-trig Ltd.
InventorsHaim Perski, Meir Morag
Life of this patent
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Abstract
A detector for detecting touches by fingers or like body parts on a sensor comprises at least one sensing conductor, typically a grid of such conductors, extending into the sensor, a source of oscillating electrical energy at a predetermined frequency, and detection circuitry for detecting a capacitive influence on the sensing conductor when said oscillating electrical energy is applied, the capacitive influence being interpreted as a touch. The detector is advantageous in that the same sensing conductors can be used both for touch sensing and for detection of an electromagnetic stylus.
Claims42
A detector for providing position detection of a first kind together with position detection of a second kind, the detector comprising:
- a sensor,
- a patterned arrangement of sensing conductors extending within said sensor, and
- detection circuitry associated with said arrangement for detecting signals at same sensing conductors arising from said position detection of a first kind and signals arising from said position detection of a second kind, therefrom to detect positions at said sensor,
- wherein said position detection of a second kind comprises capacitive-based touch detection.
Dependencies are inferred from the claim text.