Power-efficient digitizer activation for stylus pen detection in electronic devices

One or more tangible processor-readable storage media embodied with instructions for executing on one or more processors and circuits of a computing device a process for synchronizing a digitizer of a computing device with an electronic stylus device using one or more electrostatic antennas of the digitizer, the process comprising:

• performing, via the one or more electrostatic antennas of the digitizer, a power-saving search cycle for detecting the electronic stylus device;
• based at least in part on detecting, during the performing of the power-saving search cycle, a trigger event:
• ceasing to perform the power-saving search cycle for detecting the electronic stylus device;
• and
• performing a power-intensive search cycle for detecting the electronic stylus device, wherein an energy usage by the computing device for the power-intensive search cycle is greater than an energy usage by the computing device for the power-saving search cycle;
• and
• synchronizing, based on detecting the electronic stylus device during the power-intensive search cycle, the computing device with the electronic stylus device.

A computing system for synchronizing a digitizer of a computing device with an electronic stylus device using one or more electrostatic antennas of the digitizer, the computing system comprising:

• one or more hardware processors;
• a search mode modifier executable by the one or more hardware processors and configured to perform, via the one or more electrostatic antennas of the digitizer, a power-saving search cycle for detecting the electronic stylus device;
• and
• a stylus context detector executable by the one or more hardware processors and configured to detect, during the performing of the power-saving search cycle, a trigger event,
• wherein the search mode modifier is further configured to:
• cease, based at least in part on detecting the trigger event, to perform the power-saving search cycle for detecting the electronic stylus device;
• and
• perform, based at least in part on detecting the trigger event, a power-intensive search cycle for detecting the electronic stylus device, wherein an energy usage by the computing device for the power-intensive search cycle is greater than an energy usage by the computing device for the power-saving search cycle.