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LCD to LED conversions?

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OldLes:
My failure with the Sharp 42" set is somewhat dispiriting, and my pal drew my attention to a Utube video of a conversion to LED backlighting.
http://www.youtube.com/watch?v=LLIkS-cEuT0
Has anybody played about with this? It seems that CCFL, inverter board connections and simple inverter failures are commonplace, and the cost of a new inverter board for this Sharp, and the possible cost of any replacement CCFLs would be prohibitive. It also seems that CCFL tube failures are high probability.
So, what about LED conversions? I would guess about 500 LEDs would be needed, not sure how much, but it seems they are available in pre-created strips for some smaller sets. Done with care, it must be a foolproof repair surely. Would you have to tell the brain the previously existing inverter and CCFLs were all present and correct? If so, how?
Opinions please.
Les.

OldLes:
I have a Toshiba 23" which needs an inverter transformer, so by way of experiment, I have just ordered a 5M strip of 300LEDs (cool white) for £8 which I will try to fit into the Toshiba just to see how it works. Not sure how I will control the output, or if I need to fool the TV to think its inverter is still OK and working. I may need help there, but will ask later if required.
Les.

Keith:
Hi Les,

An interesting idea! But probably too costly. Good quality pure white LEDs are not cheap. You need pure white otherwise the colour reproduction of the LCD won't be very good. If you estimate 500 LEDs that will cost about £100 @ 20p each, obviously you could source cheaper if you didn't care too much about colour reproduction. you will then have to make them into strips and securely fix them. You could use the existing inverter PSU, and connect the LEDS in series groups.

If the TV will run OK with the inverter disconnected, I see no reason why it couldn't be done. But it would require a lot of experimentation. A 42" is probably a bit big, but I think it could be considered on smaller screens, if you have the time!.

I have just measured a screen and I think your 500 is about right. Looked on the old auction site and see you can get 5 meter rolls of white LEDs on a strip for less than £15, but I don't think they will be bright enough! Maybe worth a try, you have to start somewhere!

Will be interesting to see how you get on with this.

Good luck

Keith

tv tony:
Interesting, but how do you propose to illuminate them, power supplies run pretty near their threshold as it is, the current consumption of all those leds wont be small.

clark97:
Think I've got an Inverter + CCFL's + Connectors

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