I compared the rendering effects of KPW1 and KPW2, and found that the current rendering waveform seems not suitable for KPW2? KPW2 uses the Carta E-ink with REAGL waveform and this is not reflected in the latest Koreader release.
In KPW1, the ghost is negligible and the blank space is white, which make the rendering effect terrific. However, in KPW2,
the screen becomes blurred even after turning over 2 or 3 pages. There is significant character ghost from previous pages and the blank space is not white any more, in other words, not like it used to be as in KPW1.
I report an issue in GitHub(issue id:
550) with 2 figures which I hope could help to illustrate the different rendering effect of KPW1 and KPW2.