18-06-2015 дата публикации
Номер: US20150169114A1
Автор:
Amm David,
Bernstein Jeffrey Traer,
CHOUDRY Muhammad Umar,
Cieplinski Avi E.,
KERR Duncan Robert,
KING Brian Michael,
Leung Omar S.,
Mucignat Andrea,
PICHE Marc J.,
Puskarich Paul G.,
SUBRAMANI Praveen R.
Принадлежит:
Compensation for sensors in a touch and hover sensing device is disclosed. Compensation can be for sensor resistance and/or sensor sensitivity variation that can adversely affect touch and hover measurements at the sensors. To compensate for sensor resistance, the device can gang adjacent sensors together so as to reduce the overall resistance of the sensors. In addition or alternatively, the device can drive the sensors with voltages from multiple directions so as to reduce the effects of the sensors' resistance. To compensate for sensor sensitivity variation (generally at issue for hover measurements), the device can apply a gain factor to the measurements, where the gain factor is a function of the sensor location, so as to reduce the sensitivity variation at different sensor locations on the device. 1. A method of compensating for sensors of a sensing panel , the method comprising:measuring capacitance at the sensors, the capacitance being indicative of an object hovering over the sensing panel;determining a sensor location having the measurement of the hovering object; andadjusting the measurement based on the determined sensor location so as to compensate for sensitivity variation in the sensors.2. The method of claim 1 , wherein adjusting the measurement comprises applying a gain factor to the measurement claim 1 , the gain factor being a function of a minimum capacitance determined at an edge sensor location and a maximum capacitance determined at a center sensor location.3. The method of claim 2 , wherein the gain factor varies based on sensor location.4. The method of claim 1 , wherein the sensor sensitivity is at a minimum at edge sensor locations claim 1 , at a maximum at center sensor locations claim 1 , and increases therebetween from the edge sensor locations to the center sensor locations.5. The method of claim 1 , wherein adjusting the measurement comprises providing a substantially uniform sensitivity across the sensors.6. The method of claim 1 , ...
Подробнее