Hey everybody,
Got My hands on a 17” LCD monitor and dismantled it till i reached this crossroad.I’m Hoping some of you guys who’v dismantled a LCD already can Help me… with what i need to keep and i what i dont..

So i finally ended up with three parts

1) The LCD

2) The Backlight [I’m Presuming it is because it has two sets of wires-one and top and one i the bottom which i think go to the CCL’s]

This has a acrylic sheet and a paper behind it which has a hexagonal pattern [like a bee hive].THis paper looks like it can come off....should i take it off?

3)Three Sheets of This translucent plastic film…

Hope You Guys Can Help me out with this....

To keep or not to keep:That is the Question

great !!

hey guys,
Hey guys,
A quick update… I was checking if it still
works.. With only the LCD
and the backlight ... And the monitor powers up and the backlight does glow but theres nothing on the screen!!!

Did i kill it??

Ps: my original question still remains… Im gonna catchup on some sleep now… Its 2 in the morning…
Maybe ill have some luck tommorow…

Sent from my iphone.

Check my blog for more info, I did about the same project. You only can see something on your LCD when there is some acryl for your backlight. Just putting an LCD on a table with no “air” between will show nothing. There has to be a gap. Because an LCD works with light from the back (or maybe front if correct made). Best thing to do is build a table like I did in KNEX to test everything before you build the rest…

you should only have to remove the reflective layers:
1.)the very last layer is usually a white reflective layer.
2.) some LCD’s have a reflective polarizer layer; this should be removed too

but i did keep it on the backlight acrylic…

Hey Everybody,

I thought id post an update.The LCD did turn on turns out i plugged in one connector wrong.

The LCD’s Working..

The Wires from the CCL were not letting me comfrtably arrange the setup so i cut them and added a long wire in the middle:

Now the PROBLEM on hand is the hexagonal pattern from the last diffuser paper behind the backlight acrylic....

Nima what did u do ? How do we get rid of this?

Thank You everybody,
Chaitanya

That are mostly dots on the acryl. My LCD acryl was full of those dots… The only thing I still use from the LCD is: the LCD controller, the chipset for the screen and the screen matrix. So now I use a screen of 2 mm thick. Works fine for me… Then you can simulate backlight with TL-bars…

You have to keep the diffusive layers between the acryl and LCD-panel. Otherwise the backlight quality is crap. (and those hexas will show up)

SoniX - 29 November 2007 03:15 AM

That are mostly dots on the acryl. My LCD acryl was full of those dots… The only thing I still use from the LCD is: the LCD controller, the chipset for the screen and the screen matrix. So now I use a screen of 2 mm thick. Works fine for me… Then you can simulate backlight with TL-bars…

The hexagonal pattern is on the diffusive paper BEHIND the acrylic it looks like it can easily come off.. And Nima seemed to have done his table using the lCD’s original backlight .... I wonder how he did it?

Kamelisko - 29 November 2007 03:28 AM

You have to keep the diffusive layers between the acryl and LCD-panel. Otherwise the backlight quality is crap. (and those hexas will show up)

But diffusive layers don’t pass IR well…

Hey every one.
Sonix was right about the spots they are etched onto the acrylic? Nima How did udo it then....Maybe ur LCD didn’t have the hexagonal pattern.

What am i missing here? Someone come to the rescue!

chaitanyamuppala - 29 November 2007 03:41 AM

SoniX - 29 November 2007 03:15 AM

That are mostly dots on the acryl. My LCD acryl was full of those dots… The only thing I still use from the LCD is: the LCD controller, the chipset for the screen and the screen matrix. So now I use a screen of 2 mm thick. Works fine for me… Then you can simulate backlight with TL-bars…

The hexagonal pattern is on the diffusive paper BEHIND the acrylic it looks like it can easily come off.. And Nima seemed to have done his table using the lCD’s original backlight .... I wonder how he did it?

Kamelisko - 29 November 2007 03:28 AM

You have to keep the diffusive layers between the acryl and LCD-panel. Otherwise the backlight quality is crap. (and those hexas will show up)

But diffusive layers don’t pass IR well...

In my case they do pass IR well enough to get blobs (well actually I haven’t yet tested with blobs, but remote control goes trough nicely). The layers between LCD panel and backlight acryl are very neccessary to get good backlight quality. Maybe you can try to drop one of them… Even if you don’t use original backlight you have to have some diffusive layer right behind the LCD to get good image quality.
Of course the blobs will not be as sharp as with bare actyl but maybe they’ll be sharp enough to detect touches.

Quite Right....

I dropped Two of them…

One seems to work quite nicely…

Although i dismantled the CCL’s and im trying to attach it directly to the lcd matrix and put some tracing paper to diffuse it.

Also im thinking of cutting a piece of acrylic of the same thickness and size as the original backlight acrylic so i can have almost the same backlight setup without the hexagonal pattern.

Chaitanya

The pattern on the acryl should be on the backside of the acryl (comparing to LCD-panel) and it should’t be visible at all. At least not in my case.. Doesn’t your display contain fresnel lens? (look at my blog to see what i mean) Altough the pattern is very important because it works with FTIR. So if there’s no pattern, no light will be scattered towards the LCD. (like no blobs without fingers)

From your Blog the fresnel is a sheet which has a lense like quality…
Mine didnt have any…

My backlight is composed of the CCL’s and the three reflective sheets between the matrix and the backlight acrylic [which we removed]

and the acrylic with hexagons:

and the shiny wight paper behind it:

[img]http://lh5.google.co.uk/chaitanyamuppala/R07Z5l1EMII/AAAAAAAAAEQ/9JNNNfY8oDQ/IMG_0059.jpg?imgmax=640
[img]

Okay guys…

I officially fried the whole thing… there was a flame…

Its gonna be a while before i can get some more money to buy another monitor .... so see u all in 5-6 months…