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LCD contrast Control negative STN

Discussion in 'Electronic Design' started by Joe G \(Home\), Apr 20, 2007.

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  1. Hi All,

    We are changing from std Yellow positve STN to Blue/White negative STN.

    Does the contrast voltage pin work in opposite direction between postive
    and negative STN?

    Eg
    For deeper contrast on positive STN : Contrast Voltage reduced
    For deeper contrast on negative STN Contrast Voltage increased

    Are these statements above correct?

    Thanks in advance
    Joe
     

  2. What do the datasheets say?


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  3. Sorry Michael,

    This looks like a reply but realy it's the 1st post, as the 1st one didn't
    go through.

    So I am looking for replies.

    Sorry to confuse.

    Joe
     
  4. SparkyGuy

    SparkyGuy Guest

    Sorry Michael,
    ??

    What do the datasheets say?
     
  5. I am waiting for the data sheets from the manufactuer that could be some
    time.

    Hence my email hear about -ve STN

    Joe
     
  6. Gary Tait

    Gary Tait Guest

    Why do you need to know so soon?
    If you are doing a PCB design now, an want consitancy in operation, just
    design the pot for either way. It is not that hard. Same for the code if
    you are doing it from your host micro, but have a dip-switch, jumper, or
    option diode to select positive or negative.
     
  7. <snip>
    Tto improve my learning and experinces other people have had.

    Joe
     
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