The latest patent application, spotted by AppleInsider, having something to do with Apple’s upcoming headset is called “Method and Device for Eye Tracking Using Event Camera Data.” The document first explains that in typical systems, the direction that the user is gazing is determined by an eye tracking system that includes a camera. The camera is focused on the user’s gaze which is transmitted to a processor.
But Apple points out that it would require a connection with “sufficient bandwidth” to handle eye-tracking at the frame rate required. This would cause the headgear to generate plenty of heat and drain the battery on the device. So Apple was at a fork in the road and decided to use a less intensive tracking system. Light is projected onto the user’s eye and the reflection tracked. Since the system would know how much light was projected into the eyes, the data generated by the reflection could help track the user’s eyes.
Source: Phonearena
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