[iterati]

Originally Posted by Professor

Hello, Fake51, Thanks for your advice! Lbook is a good device.
I have communicated with the manufacturer, they said this problem does not exist, PDFs run very fast on HanLin V3.
Many people use HanLin V3, I will ask somebody about this. Thank you!

Indeed, there isn't a question of efficiency. The problem is that pdf is a non-dynamic format & formatted to fit in an A4 page, it is a format indended for printing with other words. The curious is why it became popular.... and even reflow support in later editions doesn't mean much, the majority of available documents (99%, I guess) are still static.
v3 has not trouble to display and handle pdf documents, very fast, but in some cases the text appears small, you can't compare A4 page with 6-inch screen.
Check also: http://www.openinkpot.org/wiki/Optim...eink%20display