Method for adapting a pulse power mode of a proximity sensor
There is described portable electronic devices having one or more proximity sensors with adaptive capabilities that can help reduce power consumption. The proximity sensors of the portable electronic device in accordance with the present invention may be adjusted to operate in multiple and/or different modes. These modes are environmentally and contextually driven. An adaptive sensor is dynamically adjusted based on different criteria. In particular, adjustments are based on correlations of input signals from one or more sensors of the device, data signals received from the device's processor and/or external data signals received from an external source, which provide characterization values of environmental, contextual and/or ambient light characteristics. Adjustments are made to pulse power to affect the range of the sensor, pulse frequency, filtering of noise of the sensor input signal to attenuate interference and the spectrum of a proximity detector.
1. A method of a portable electronic device for adapting a pulse power mode of a proximity sensor configured to detect light of a particular frequency range, the method comprising:
determining environmental and contextual characteristics of the device;
selecting the pulse power mode of the proximity sensor based on determining the environmental and contextual characteristics of the device, which comprises:
receiving one or more characterization values, and
determining from a look-up table a pulse power mode based on the one or more characterization values; and
adjusting the pulse power mode of the proximity sensor based on a selected pulse power mode.
2. The method of claim 1 , wherein determining environmental and contextual characteristics of the device comprises:
receiving input signals from one or more sensors of the device; and
correlating the input signals to evaluate the environment and the context of the device to generate a characterization value representative of the environment and the context of the device.
3. The method of claim 1 , wherein determining environmental and contextual characteristics of the device comprises:
receiving data signals from a processor of the device; and
correlating the data signals to evaluate the environment and the context of the device to generate a characterization value representative of the environment and the context of the device.
4. A method of a portable electronic device for adapting a pulse power mode of a proximity sensor configured to detect light of a particular frequency range, the method comprising:
determining environmental and contextual characteristics of the device, which comprises:
receiving external data signals from an external source, and
correlating the external data signals to evaluate an environment and a context of the device to generate a characterization value representative of the environment and the context of the device;
selecting the pulse power mode of the proximity sensor based on determining the environmental and contextual characteristics of the device; and
adjusting the pulse power mode of the proximity sensor based on a selected pulse power mode.
5. The method of claim 1 , wherein adjusting the pulse power mode of the proximity sensor comprises:
increasing the amplitude of a pulse of the proximity sensor or lengthening the duration of a pulse of the proximity sensor.