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Thread: LCD in sunlight

  1. #11
    Maximum Bitrate
    Join Date
    May 2001
    Location
    Cincinnati, Ohio
    Posts
    461

    Post

    How about the extreme heat generated by the sun? Would that damage a TFT?

  2. #12
    Constant Bitrate
    Join Date
    May 2001
    Location
    Australia
    Posts
    183

    Post

    Yes. I would be worried about heat as well as UV rays (As the others here from Australia know, we have heaps of both). The seal around the edge between the two layers of glass that make up the LCD is very fragile. When the LCD is heated the liquid crystal chemical between expands which can damage this seal. If the seal is damaged the liquid crystal is slowly lost and the display ceases to function(usually starting with a small area and spreading from there. This damage can occur *SOME* LCDs.

    Many are available in Extended Temperature Range versions. ETR versions can take a higher temp without damage and have slightly different electrical characteristics (often require a negative bias voltage. This allows for a temperature compensated LCD contrast).

    Anyway to get to the point. I wouldnt worry about it for a character LCD. Even if the UV and heat kills it after a couple of years, it's cheap enough to replace. However, If I had a $600 TFT I would be a litte more carefull. You could try one of those little solar powered fans that such the heat out of your car when it's parked in the sun (I dont know how well they work. I've never tried one).

  3. #13
    Constant Bitrate
    Join Date
    Nov 2000
    Location
    Ottawa, ON, CA
    Posts
    142

    Post

    UV light does not generally penetrate most forms of glass .. and any UV that does generally has a lower potential energy (thus less damaging effects)

    It's the IR light that destroys stuff in cars !
    -James-

    Tech tips and more - http://www.techguys.ca

    *NIX command for today: rm -rf /bin/laden

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