philips ambilight tv faulty

[Mikeyboy2007]

Hi guys got a friend of a friend that has asked me to loom at his tv. He said the line used to be further down but as time as went on the fault has went further and further up the screen... is this a faulty panel ?

I have put an old working tv beside the faulty one to show what picture should look like.

[tom66]

Re: philips ambilight tv faulty

That's a bad panel. Possibly it can be fixed by tab bond repair but probably not. Usually horizontal bars are the hardest to fix

[Mikeyboy2007]

Re: philips ambilight tv faulty

Ok tom thanks will let him know cheers. Hes givin me 2 tvs so hopefully other one isnt the same.

[tom66]

Re: philips ambilight tv faulty

If you scrap this TV... I'm interested in the ambilight strips for building my own ambilight for my TV...

[Mikeyboy2007]

Re: philips ambilight tv faulty

Tom sorry just got this reply. i did scrap it sorry but when i get hold of another i will let you know. i didnt realise you could build Ambilight, would RGB or dream-color strips from ebay not work ?

[tom66]

Re: philips ambilight tv faulty

I am using ones from China, but I have concerns for the overall reliability. I can get 3m of strip for about £45 which is 180 RGB LEDs.

I then have to build some custom electronics to supply 5V @ 10A and control them to follow a video signal. I'll be putting a build log up soon on this.

The ambilight bars seemed like a cheap way of getting RGB LEDs but most sellers wanted more than actual strips plus I'd need to decode an obscure communications protocol (TV to ambilight strips) without a usable TV, so it would have been difficult.

This is a 180 channel ambilight design I'm working on, which basically means each light is independent and follows the video source directly.

[stj]

Re: philips ambilight tv faulty

i'm sure i'v seen them much cheaper than that from china.
5m roll costs less than that i'm sure.

[tom66]

Re: philips ambilight tv faulty

i'm sure i'v seen them much cheaper than that from china.
5m roll costs less than that i'm sure.

Yes, you are correct, but not with independently controllable LEDs. This design can have each of the 180 channels with a different colour.

[stj]

Re: philips ambilight tv faulty

those ones are expensive that's true.
are you looking at the integrated ones or the cheapo microcontroller on the strip type?

[tom66]

Re: philips ambilight tv faulty

WS2812B based ones, driven from twin SPI ports (90 LEDs/port)

Since the WS2812B can be driven up to about 360 Hz framerate, you can do sub-field multiplexing like a plasma display to get 10 bits of RGB information (at 60Hz real frame rate) which is sufficient for a good LED display. At 24fps (cinema) you can go up to 11 bits of RGB data.

Still a work in progress.

[stj]

Re: philips ambilight tv faulty

http://www.aliexpress.com/store/grou...251310291.html

[tom66]

Re: philips ambilight tv faulty

I'm buying them from Seeedstudio, it works out at $16.90/1m strip (with 60 LEDs/m, not standard 30 LEDs/m)

That's about $50 or £30 plus shipping cost.

But I am also buying some PCBs for the project from there. It samples VGA analog video and has a Tiva ARM CortexM4F on it for the control of the display.

[stj]

Re: philips ambilight tv faulty

i was looking at this one to replace some ropelight actually.
http://www.aliexpress.com/store/prod...935645023.html

and maybe these for experiments.
http://www.aliexpress.com/store/prod...202415085.html