I am driving a large, complex HTN LCD with 3 Holtek HT1625 LCD drivers. There are over 700 segments. The data sheet for HT1625 LCD driver is here: http://www.holtek.com.tw/documents/10179/116706/ht1625v170.pdf
The problem is the ghosting effect, where the LCD segments are being partially on when they should be off.
All segments should be off in this picture.
This image shows OFF segments are affected by the ON segments. Some kind of crosswalks, I guess.
I am trying to figure out whether it is the driver or the LCD signal layout. Is there anything I can do to improve the display? I tried different LCD bias voltages but they seem to affect the view angles more than the ghosting effect.
Any pointers are appreciated.