The Dasung Paperlike is a one-of-a-kind USB monitor with a 13.3" E-ink screen. This device is an expensive solution for those who get headaches from LCD screens, and it is almost impossible to acquire, but luckily it is not your only option.
Sol Computers offers the Vision, a monitor with inputs for VGA, HDMI, and RCA. It's built around a ten inch Pixel Qi display with a screen resolution of 1024 x 600, and costs $499.
The Pixel Qi screen on the Vision is a special type of an LCD screen which offers a unique solution to the sunlight usability problem.
It features a backlight which can be disabled at the flick of a switch, and if you take the monitor outside you'll discover that it becomes a grayscale monitor when exposed to sunlight.
At 10", it's not a particularly large screen, but it is available and it is considerably cheaper than the Paperlike monitor from Dasung.
Unfortunately, I don't expect to see a larger model any time soon.
Pixel Qi screens were originally developed for the XO-1, the low-cost educational laptop developed for the OLPC project. They were designed to be a low-power screen which continued to function even when used in direct sunlight.
The tech was spun out of OLPC into Pixel Qi, which was launched in 2008 in order to develop and produce the screens for commercial customers. The company developed both 7" and 10" screens which were used in several tablets and laptops over the next 8 years.
Due to Pixel Qi's tenuous state, I don't expect them to develop and launch a larger model. On the other hand, Pixel Qi's patents are licensed under the defensive patent license, so it is possible that another company might decide to pick up where Pixel Qi left off.
LCD screens don't bother me, so I can wait and hope for the new screens. But if LCD screens cause vision problems for you then you should consider trying the Vision monitor.
After you've tried it, do let me know whether it helps. Sol Computer pitches Pixel Qi screens as a solution to the vision problems caused by regular LCD screens, but I don't have any first-hand reports which confirm the hype.
If you have a Pixel Qi screen, please feel free to share you opinion. I'm sure I'm not the only one who would like to hear what you think.