The device I saw was crudely camouflaged in a sort of cardboard enclosure, but the screen was clearly visible. With a tap, a slider popped up on the screen, and as it was dragged to the right, the screen lit up evenly with a rather cool light. In the dark, it was plainly noticeable as a glow, and in uneven light — say, shade or a shuttered room — the slight illumination made the screen much more readable. At full blast it was definitely projecting some light (technically speaking it was reflecting it), but it was still a soft glow and not the harsh flashlight of a backlit LCD.

via techcrunch.com

見やすく光るそうで。楽しみですね。