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This top layer has been described by Amazon as being akin to a fiber optic cable flattened out into a sheet. These tiny lights point toward the display, and the light guide layer disperses the light across the entire screen. There are four tiny LEDs built into the bezel at the bottom of the device's screen.
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And the light guide is something new altogether. The multi-touch screen is a step up from the Kindle Touch's infrared (IR) touch screen.
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The display layer is similar to previous Kindle displays, but with improved resolution and contrast. The display is made up of three layers: the E Ink display (innermost), the capacitive touch screen (middle) and the light guide (outermost) layers. The most innovative thing about the Kindle Paperwhite is the front-lit screen with what Amazon is calling "light guide" technology.
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