So I thought of this around 2 years ago but I finally decided to share this concept. I should probably patent it, but oh well, I can’t keep this great idea a secret from the world. (Note: If you’re a major company and want to take this idea, I’m easy to please!).
Basically take a tablet device with two layers. One is a typical LCD/OLED/Color display. The second layer is e-ink with a transparent background. When you want to use your iPad (for example) as a normal tablet device, the e-ink layer would be switched off and since it’s transparent, it would look like you’re using a normal iPad. When it’s time to read a book, the LCD would switch off and the e-ink layer would switch on giving you that nice ‘paper’ looking screen.
This would make reading better, save a great deal on battery, reduce eye-strain, and potential to use the LCD backlight as a backlight for the e-ink screen for night reading.
Anyway, just something that’s always been in my mind.