Head-mounted device with flicker judder mitigation

A method of operating an electronic device comprising:

• with one or more image sensors, acquiring images of a scene;
• with one or more displays, outputting the acquired images of the scene;
• with a flicker sensor, sensing light in the scene;
• obtaining a frequency of the sensed light;
• computing a display artifact severity parameter based on at least the frequency of the sensed light and comparing the display artifact severity parameter to a threshold;
• and
• in response to determining that the display artifact severity parameter exceeds the threshold, mitigating judder when outputting the acquired images with the one or more displays by adjusting a frame rate of the one or more image sensors.

A method of operating an electronic device, comprising:

• with a flicker sensor, sensing light in a scene, the light exhibiting a waveform having a first frequency;
• with one or more image sensors, acquiring images of the scene by aligning sensor exposure periods to certain portions of the waveform;
• and
• reading out the images from the one or more image sensors at a second frequency that is asynchronous with the first frequency.

A method of operating an electronic device, comprising:

• with one or more image sensors, acquiring images of a scene illuminated by a first light source and a second light source;
• with one or more displays, outputting the acquired images of the scene;
• detecting a frequency of the first light source in the scene;
• detecting a frequency of the second light source in the scene;
• mitigating flicker associated with the first light source by performing an operation of a first type;
• and
• mitigating flicker associated with the second light source by performing an operation of a second type different than the first type.