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Apple's latest patent, recently issued by the United States Patent and Trademark Office, hints at a potential resurgence for the 3D Touch technology, which was previously supplanted by Haptic Touch. The core innovation of this patent lies in a significant boost to touch accuracy, achieved by ditching traditional capacitive sensors and strain gauges in favor of advanced coherent laser interferometry. The system integrates multiple arrays of VCSELs (Vertical-Cavity Surface-Emitting Lasers), integrated photodetectors, and sophisticated algorithms, enabling it to capture touch data with unparalleled precision. Unlike its predecessors, the new patent's sensors can seamlessly track pressure variations, support multi-axis inputs, and adapt to diverse interaction interfaces, paving the way for potential applications in devices such as Apple Watch bands and MacBook trackpads.
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