SED1335 LCD Controller: Screen Disturbance

Hello all,

I've been using this chip (built into an LCD module) for a while and have
the LCD inverted, i.e. background "black" and characters "green".

I find that when I write info to the screen I often get very slight
disturbances (tiny horizontal lines) appearing on the screen that vanish
again almost immediately.

I have written my code so that it only updates the SED's memory inbetween
LCD screen-line writes (if I don't do this, the problem is MUCH worse!) to
minimise flicker.

I find that if the LCD is not inverted, the effect cannot be seen at all (at
the moment, the spec I am following requires inversion).

Does anyone have any experience of this problem with this chip? I have
poured over the device spec and can't see anything I can do, it's not a
terrible problem because the disturbance is only slight, but I'd like to get
it as good as possible!

Regards,
Richard.


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