Quote:
Originally Posted by CatRovacer
Thanks for response. 
Then if say by other words:
Which display prefferable: with -1.5V or -2.5V Vcom?
|
Neither is preferable based on Vcom -- you need to check the display speed, contrast, min/max reflectance, etc. The differences were not easily noticed when I played with Vcom values. Using the manufactured suggested value for the display is the safest route.
Quote:
Originally Posted by CatRovacer
Also still question "How to read and/or rewrite Vcon for Kobo GLO?" 
|
I've never dismantled a Glo to that extent. Depending on the chips used, changing Vcom may be simply changing a resistor value or it may require reprogramming a chip's internal EEPROM. Check the data sheets for the chips for more information.
The last time I played with eInk displays was about 4 years ago when I was trying to connect a Raspberry Pi to an eInk display so my information is likely to be outdated.
You might want to check
Sprites mods Eink display and
Essential Scrap - eInk for some ideas.