Enforcer

The only 'hate' came from the OP (who incidentally has received a 'yellow card') after being given good advice and not likening it.

Next time I shall not warn any future newbs about the danger of messing with the high voltage around backlite inverters, just as I won't warn any small children about the dangers of playing with fire.

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ironfinger

iamgnat, your whole post was full of contradictions.. you basically said that I shouldn't ask a question about something I don't know, then followed up with another contradiction by saying do research then come back with a question about what I couldn’t find.ARRRR!!!!!

Enforcer, you may have given advice, but it was filled with flame bait attitude, and it worked, you baited me into flaming and I got a warning, so I'm sorry for calling ya a prick if that even matters to you. If you search all my previous posts I try to share info I know in a mature helpful manner. My specialty is mostly car audio which involves just as much danger. If some car stereo noob asks about amp installation I will offer advice or point towards how-to links, most likely with proper safety steps. If those do not exist, or if I don't have the info I just will not offer any advice and hope someone else will. Or, get this, I may just say don't do it because there's no easy way of doing it yourself without expert knowledge, but I would do so in a non aggressive high an mighty way.

iamgnat

Is it really that hard to comprehend going and doing the basic research (do you think how CCFLs in general work and are wired, how backlights work, etc... would probably be a good place to start? Seems pretty reasonable to me...) so that when you ask a question you can ask specific questions in a manner that shows that you at least have some idea about what you are asking.

You complain that you feel Enforcer and myself have treated you and your request for information poorly, but the way you wrote your original post (and honestly my opinion of you hasn't changed based on your further posts in this thread) is that you want to be spoon fed the information and don't care about the opinions of others that are warning you about your own safety. In this situation, that is a very dangerous combination.

And yes playing with Amps (specifically with the car's battery and Alt) can be dangerous too and no I don't think just anyone should jump right into it. But I didn't walk in and demand my car audio shop teach me how to do it so that I could by pass them. I paid them to do the first two, watched them, learned, read up on the details, then I started doing my own work. To expect someone that has 0 experience to be able to understand the risks with such work and do it safely based on a howto is plain negligent if you are the one pointing them to such information while being aware of their inexperience.

I wish you luck on your project, but as this thread has turned into nothing but a slap fight, i'm moving on.

-dave

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bbalazs

Answering the ORIGINAL question:

No, you can not do that easily. There is not enough space to put your second tube to. Additional problem, the backplane is designed for having ONE tube, that means the light spreader is special and different from the light spreader for two tubes (both side).
Next problem you have to face is: as far as I remember, the backlight unit is built on the main PCB of the lilliput.

And now the possibilities:
1. Use sunlight readable display
2. Because the LCD part is totally independent from the backlight, it can be separated and can be replaced a kind of backlight you like. I recommend LEDs - somewhere in the forum, there is a good example, somebody made a 15' with watercooled extra strong backlight. Because it lights toward you, it can be very bright, and increasing the number of leds there is 'no limit' for brightness contrary to the CCFLs, that shine from sideway (perpendicular to the flat surface of the LCD).
3. Make your own backlight out of two tubes AND a special backplane with light spreader designed for two tubes. For example, in my small 7' LCD TV there are two tubes.

If I am wrong, and the lilliput has two tubes (I mean top/bottom), you have to replace the backplane to a thicker one and double those tubes top/bottom (two tubes are laying parallel on the top of each other).

Powering those tubes: you have to keep both the original units, because wiring parallel overload a single unit. You also have to synchronize them, but it is quite easy...

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Enforcer

There was no flame bait attitude in my posts whatsoever, you're just trying to make excuses for flaming.

I just gave good solid advice from what I have learnt by reading on the forum, and having experience of taking numerous Lilliputs apart.

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ironfinger

imagnat

Once again you just don't get that everyone starts off with 0 experience at some point.
Were you born with cursory knowledge of lighting fixtures?
I did do searching and I don't expect to be spoon fed. You're just jumping to conclusions without even knowing me, nor my DIY skills, experience, or work methodology. There's no way you could have attained any of that knowledge in my first post. You're just using me and this thread as an excuse to step up to the pulpit.

But, this will be my last rant on this. It just came to a boil because I’ve been holding back every time I see this happen to others who come in asking questions. But it finally happened to me and I couldn’t keep it shut in.

ironfinger

bbalazs thank you! I will open the lilliput up to see it's configuration. It would be cool if i could use the existing unit. It will solve the issue of wiring and powering the second backlight.
Is it possible to stack backplanes if it needs to be thicker?

ironfinger

you think I wouldn't take that as an insult?
EDIT TO ADD, yeah, you did give good advice too, thank you for that. .

bbalazs

I think yes, but you have to fix it by a different method than the original. Certain electronics also exists there...
Think twice, the brightness you sense wont be doubled by doubling the number of the bulbs (our eyes works on this weird way).

Also take care about those thin flatribbon cables/wires that leads to the glass part of the lcd, they are extremely sensitive. Do not tense or bend them, because they are just glued onto the glass, and I do not know any method to push them back...

I strongly suggest to use LEDs (Ceterum censeo....)

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greatwhite

LED's, now you have my attention...........

Any advice/guidance on converting from CCFL backlight to LED backlight? Sure would be nice to ditch the heat produced buy the CCFL backlight components and the long warm up time in cold weather........

Cheers

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nobb

I am interested in the prospect of an LED upgrade as well and I was considering it too. On ebay, some chinese sellers are selling bulk smd (very small and bright 2500mcd) leds for very cheap. <$20 shipped can get you 50pcs.

Maybe you could solder up a bunch of these LEDs in a string-like structure (epoxy for support?) and slide it into the spot where the ccfl tube normally goes. You wont be able to hook it up to the high voltage output of the inverter though, so you would need a way to feed power to them.

My cell phone has a screen size of 15cm^2 and it is very brightly lit by 4 smd leds (its readable in the sun). A standard 7 inch ts has a screen area of 135cm^2, so according to my calculations, about 30 - 40 of these smd leds should light up the screen fairly well (theoretically, I think). The width of a 7inch ts is 15cm, and each smd led is 0.32 mm long so you can easily fit 30-40 of such leds on the same length as the ccfl tube.

I would be really interested in pics if anyone decides to go for this.

Bugbyte

JCdillon and Scouse Monkey made a run at this a couple of years ago. 1222 posts.

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quantum

Somebody say LED backlight? I love mine!

I started following this thread because I took apart a 7" LCD with a cracked screen the other day and began the "what if" thought process. Not for my LED monitor, but for a CCFL I have.

I also seem to remember coming across someone doing exactly this on the forum. I can even visualize the picture in the thread, it was 2 CCFL backlights mounted on their internal diffusers placed one in front of the other. They were turned so one tube ran across the top and right side, the other ran across the bottom and left. 2 inverters were used IIRC. Damned if I can find the OP though.

I know there isn't a whole lot of room inside the LCD housing with all the filters and diffusers films and screen, and adding 2mm more of CCFL probably wouldn't fit. But it doesn't look like too much of a stretch to extend that. Biggest challenge for the housing would be sealing in light and of course heat. I also believe that the net gain woudn't be exactly 2x brighter, but in theory it would be pretty close.

Oh, and to chime in on the lack of love, I gotta say that if someone said to me they wanted to begin playing with high voltage and haven't got a clue, I probably would have said "don't" too. Misunderstandings aside, it just would have been an automatic response from a safety standpoint.

Anyway, good luck on the project, keep us posted. I'll probably experiment with mine once things slow down on the ranch here.

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