Amazon Kindle Fire HDX 7 featuring a Quantum Dot display from Nanosys and 3M

Aug 13 (Reuters) - When Amazon.com Inc was developing its most advanced tablet to date, it asked a little-known company to solve a tricky problem with the screen: how to produce rich colors without draining battery life.

With the help of Milpitas, California-based Nanosys Inc, the Kindle Fire HDX 7 became one of Amazon's best-selling tablets, winning critical acclaim for its vibrant display.

The answer? Quantum dots, which are semiconductor crystals 10,000 times finer than a human hair. They convert electrical energy into light and can be manipulated to produce precise colors.

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