Researchers had wrestled with e-book readers for decades, but most sported power-thirsty, backlit LCD screens that glared in low light or were drowned out by bright sunlight.

• 研究人员苦思研发电子书阅读器已经有数十年了，但是萤幕所使用的LCD背光模组耗电量太高，在阴暗处使用时显得太过刺眼，在太阳下又会被强光盖过而无法阅读。