Apple Patent Could Bring True Tone Display to Apple Watch by Measuring Ambient Light Through Skin<img style="float: left; margin-right: 10px"  src="

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Apple has patented a new method of measuring ambient light that could bring its True Tone display technology to a future Apple Watch. The invention uses a special sensor to measure light through a user’s skin, allowing it to be placed on the back of the device.   
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Apple Patent Could Bring True Tone Display to Apple Watch by Measuring Ambient Light Through Skin