Proximity and multi-touch sensor detection and demodulation
First Claim
1. An electronic device comprising:
- a first input device configured to detect a presence of an object;
a second input device capable of switching between a normal power mode and a reduced power mode; and
a processor in communication with the first input device and the second input device and configured to switch the second input device to the reduced power mode based on a detection of the presence of the object by the first input device.
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Abstract
The use of one or more proximity sensors in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the sensor outputs is disclosed. In some embodiments, one or more infrared (IR) proximity sensors can be driven with a specific stimulation frequency and emit IR light from one or more areas, which can in some embodiments correspond to one or more multi-touch sensor “pixel” locations. The reflected IR signal, if any, can be demodulated using synchronous demodulation. In some embodiments, both physical interfaces (touch and proximity sensors) can be connected to analog channels in the same electrical core.
89 Citations
20 Claims
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1. An electronic device comprising:
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a first input device configured to detect a presence of an object; a second input device capable of switching between a normal power mode and a reduced power mode; and a processor in communication with the first input device and the second input device and configured to switch the second input device to the reduced power mode based on a detection of the presence of the object by the first input device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reducing power consumption by an electronic device, the electronic device comprising a first input device and a second input device, the method comprising:
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detecting, by the first input device, a presence of an object; and switching the second input device from a normal power mode to a reduced power mode in response to a detection of the presence of the object by the first input device. - View Dependent Claims (10, 11, 12, 13)
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14. A method performed by an electronic device comprising a first input device and a second input device, the method comprising:
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detecting a presence of an object from data captured by either the first input device or the second input device; and disabling the other of the first input device and the second input device in response to the detected object presence. - View Dependent Claims (15)
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16. An apparatus for reducing power consumption by an electronic device, comprising:
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first means for detecting a presence of an object; second means for switching between a normal power mode and a reduced power mode; and means for switching the second means from the normal power mode to the reduced power mode in response to a detection of the presence of the object by the first means. - View Dependent Claims (17, 18, 19, 20)
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Specification