Smart mobile handheld platforms continue to integrate an ever increasing spectrum of functions from
multiple communication standards to a wide array of user interface features and sophisticated power
management. This paper explores advances in optical sensors as they apply to enhancing the user
experience and extending battery life. Developments in ultra-low power optical proximity sensors are
enabling distance measurement and contactless gesture detection while simultaneously supporting novel
power management techniques. Integration with traditional ambient light sensors optimizes display
power while maintaining satisfactory illumination.
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