Traditionally there are LED lights embedded into the bottom of the bezel and they project light upwards across the screen. (goodereader.com)
Unlike smartphones and tablets, the light does not shine in your eyes, instead its evenly distributed across the screen via LED lights on the bottom of the bezel. (goodereader.com)
There is a camera positioned at the top (curiously not mentioned in the specs) with an Apple - like Home button on the bottom of the bezel. (arstechnica.com)