NP-41 Emulator (may be)

[jebem]

(10-03-2015 09:58 PM)Chris Chung Wrote:  MEMORY LOST.



The most worry now is the quality of how I am driving the display. The ghosting is just too much. Have to rule out these possibilities.

. bad soldering.
. lack of precise bias control (due to no charge pump).
. software / firmware not optimized (timing and other control).
. LCD itself?

Hi, Chris,
The LCD ghost can be caused by excessive high scan frequency (timings in your shortlist above).
Did you try to reduce it to a value as low as possible (without flickering)?