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Thread: Compact fluorescent backlight

  1. #1
    FLAC is for flaccid parksgm's Avatar
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    Compact fluorescent backlight

    Hi all,

    I'm building a compact fluorescent backlight upgrade (not CCFLs!) for my 7" Super screen using bulbs like these:

    http://genet.gelighting.com/LightPro...ouble+Biax®_T4

    ...except with a color temperature of 5000K. They'll be arranged in horizontal rows behind the LCD. Heat will be managed through a combination of case design and forced air cooling.

    I've searched for a similar project on the forums in an attempt to determine the overall feasability/any potential drawbacks, but all other backlight upgrade threads seem to revolve around using either CCFLs or LCDs. Anyone know of an attempted compact fluorescent light upgrade?

    Pics to follow...

  2. #2
    Maximum Bitrate Fusion-One's Avatar
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    I tried it. I used 6 850lumen (13w) compact fluros. It got too hot, even with a 120mm fan blowing into the lightbox.

  3. #3
    FLAC is for flaccid parksgm's Avatar
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    1) Aside from the cooling issue, did it effectively light the screen?

    2) What exactly do you mean by "too hot". Did it damage your LCD?

    Thanks,

    Gregory

  4. #4
    Maximum Bitrate Fusion-One's Avatar
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    It was bright, I'd say about twice as bright as the normal backlight. By too hot I mean that the box was so hot i couldn't comfortably hold my hand on it.

  5. #5
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    floresent lamps are way to inefficent, & will make a whole lot more heat than the same amount of light from ccfl's.. why not use ccfl's, there not very expensive really or hard to get.... the side benifit of being able to dim them will be another huge plus... I don't get why you'd rather use the wrong thing for the aplication when the right thing isn't any harder really?

  6. #6
    Variable Bitrate
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    5000k is more of a bluish white isnt it?
    Carputer HIFI car stereo project!
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  7. #7
    Maximum Bitrate Sidewalksalvage's Avatar
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    I think the CCFL is a better way to go. They are much more available and manage temperature much better.
    Brown 2010

  8. #8
    Maximum Bitrate Fusion-One's Avatar
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    Go with CCFL, or LED's. Those're the best options.. and neither is very expensive.

  9. #9
    Variable Bitrate
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    arent LEDS directional though? so wouldnt you get "spotting" unlike an even glow with a ccfl tube?
    Carputer HIFI car stereo project!
    [XXXXXXXXXXXXXXXXXXXXX-]
    95% COMPLETE! FINALIZING SOFTWARE PLATFORM!

    [XXXXXX--------------]
    30% COMPLETE! CAPUTER Version 2.0! Hardware FAILING! CARPUTER BLEW UP! AND NOW MONITOR TOO! WTF?!

  10. #10
    Maximum Bitrate Fusion-One's Avatar
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    Short answer: No.

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