I have a handheld battery powered instrument with a LCD display that has a
sort-of ghosting appearance (slow transition response?).

The readings are stable, they aren't drifting or searching for a reading, as
they might if the input components were out-of-spec.

(1) The digits change slowly
(2) the display looks different when viewed at an angle for certain
readings.

When the decimal point is in one place, the digits look normal.. but when a
different range is displayed, the display looks OK viewed straight on, but
looks like it's all eights (88888) when viewed from an angle (off center
from the left side).

Is it likely that the slow transition time is a fault/result of the A-D
converter/driver IC? It's a socketed Intersil ICM 7211AIPL 40-pin device.

Would the ghosting be related to a backplane or a DP signal?

Do polarizer filters go bad? If one is utilized I suspect that it's bonded
to the LCD.

I've inspected and cleaned the zebra strips and board pads for the display
signals, and the same symptoms are still present.

Any suggestions would be appreciated

Thanks
WB



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