Thread: LCD Backlight Upgrade

  1. #1131
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    Quote Originally Posted by greenman100
    So then do 2/3/4 bulbs wired in series attached to an inverter that outputs 2/3/4x the starting voltage....

    apparently this is not possible with CCFLs.


    dual output inverter?

  2. #1132
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    a dual bulb inverter will have two seperate circuits or outputs, one for each bulb.... the two circuits or outputs will be internally closed looped, which means they "see" each other & sync with each other.... that's why two seperate inverters won't work......

    the only thing similar that can get wired in series are called EEFL'S..... there latest greatest, & will relpace CCFL technology soon.... but still mostly in development stages & impossible to get your hands on, we tried hard.....me & jcdillin had a joke a while back about us having japanese fonts installed on our computers just to comunicate with them

    a few major manufactures actually have screens in production using this tech, were talking the likes of sony & panasonic... but for the most part it's just too soon for an individual to even consider at this point

    a dual bulb setup shouldn't be extremely difficult to source,I never tried as I personally was looking for much more that dual though.... & that's where it gets really difficult....

    one major problem in the area of multi bulb inverters is that suppliers aren't really geared up to deal with supplying these to an end user..... they really aren't interested in selling one or even 10.... there geared up to supplying manufactures..... you can have anything you want built for you when your talking large quantitys, but to get a manufacturer to deal with an individual with stupid questions & no real potential for anything significant to them, they'll just ignore you.....

    I gave up on that a while ago.... now since jc & scouse have the benifit of many more potential users than just one or two, they trudge on with this project.... gotta give them credit for there persistance.... you can also support there project with a donation.... every little bit helps....

    this is only the tip of the iceberg.... there is awhole lot more to consider & I don't want to sit here typing all night, especially since much of this has already been covered..... if you really want to do this then you must realize it's just not simple...... I would suggest that you START your quest by reading this thread, searching for other threads that also touch on these issues...... google & read....understand that just having two ccfl's that light up is not the end of your project, just the begining really... you then have to learn about light guides, diffusion, color temperature, the fact that over 80% of the light you start with will not be available to you on output.... it's not that simple really..... theres a lot to know.... & once you realize all the variables you can then start your quest for suppliers who will even talk to you...... good luck with it, you'll need it

    there is no one answer or one person that can answer you really.... after you get through with all of your research & sourcing.... you would then have to get to the point of development.... testing & if your really persistant you might actually pull it off

  3. #1133
    MySQL Error jcdillin's Avatar
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    the main problem with a inverter that has such a high starting voltage is getting the transformer, thats why we ditched the first tube design as it required 3kv starting voltage, which from 12v is not easy. Also the running voltage was so high that it was leaking everywhere.
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  4. #1134
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    ahhh yeah, that too I guess

  5. #1135
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    Quote Originally Posted by turbocad6
    a dual bulb inverter will have two seperate circuits or outputs, one for each bulb.... the two circuits or outputs will be internally closed looped, which means they "see" each other & sync with each other.... that's why two seperate inverters won't work......

    dual output inverters us a single transformer, meaning they'll be in sync with each other.

    so why not?

  6. #1136
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    I hate morons!

    Some guy from work who thinks he knows everything about leds etc etc jsut collared me in the pub about wjy i should use LEDs etc etc.

    I am so ******* sick of explaining to people why we are going the route we are. I was trying to decide if i should strangle the ****** or simply glass him in the throat with my pint glass! Serious! I could see me doing it and the blood spurting everywhere!

    damn i hate morons!

  7. #1137
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    Sorry Scouse, it seems that you just got into this project a little too deep(good thing! & Jerry too ), you just get it from all angles.

    I hope that after you get that link up that ppl will use it....

    yea turbocad6, hows yours doing, I haven't read any thing with it lately, or is life getting in the way again/still? LOL
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  8. #1138
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    Quote Originally Posted by greenman100
    dual output inverters us a single transformer, meaning they'll be in sync with each other.

    so why not?

    Sure, as long as your going with 2 short tubes.
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  9. #1139
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    Thats why we are going with shorter tubes, this is the inverter I have waiting to test with, as you can see it's actually 6 independant inverters so that they should not interfere with each other.

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  10. #1140
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    Quote Originally Posted by jcdillin
    Sure, as long as your going with 2 short tubes.

    nice 6-way.

    however, I have an inverter here that powers 2 12" white CCFLs....why not 2 U shaped CCFLs?

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