Help - Search - Members - Calendar
Full Version: 10.6" Polarizer/ag Layer
Lumenlab > Audio Video Sciences > Advanced Projector Builder > Projectors based on small panels
The J
Recently, I bought the 10.6" LCD with MST controller from the Trading Post here. The LCD was already mostly stripped, it seems. The rear (I assume that the side the circuit board wants to hang on is the rear) is shiny, but the front has a matte finish, which made me think that the front had an AG on it. After reading stripping guides on here and stripping a 17" LCD, I thought I was ready to go at it. I've read that others were able to strip this LCD dry, so I tried that and the AG on front was coming up easily. l pulled a piece about 1 inch down the width of the LCD and halfway down the height before I realized that I was also pulling up the polarizer. ohnoes.gif

I did some more searching and found a few plogs with guides on stripping this LCD. One plog said that there didn't seem to be a way to get the AG off the front without the polarizer coming with it and someone in another was able to get the front to a shiny black, so I don't really know if I did something wrong or if the AG and polarizer are combined on the front.

Either way, I tried putting the AG/polarizer back down, but can't get it just right. Air bubbles appear that I can see in the picture (when looking through the LCD directly; I don't have it projecting on a wall yet). Is there a way to smooth it down or am I just going to have to buy a new polarizer? If I do have to buy, will I need to buy a pair for the front and back or do I just need one for the front? Also, I remember reading that the stock polarizer is better than many aftermarket ones in transmissivity. Is there any polarizer I can use that at least comes close to the transmissivity of the stock one?

Thanks for any help anyone can give. I can see this is going to be one fun project. tongue.gif
J
jonjandran
You won't be able to get that big of a piece down without it showing imperfections in the projection.

You will need a new polarizer, but just on the side where you removed that piece. Or you might be able to just use a small piece of polarizer on your triplet.

Someone else will have to tell you where to get it from , but you might put up a post in the Buying/Selling forum and see if someone has a piece for sale.
elken2004
ok,, solution is to put a piece directly behind or in front of the triplet,

I have put mine inside the the triplet,, works perfectly well, solves all the expense issues getting a piece big enough for the panel,, also added advantage is a dial up style control on brightness too by simply turning trippy in threaded focusser,, smile.gif
geckostudios
The above advice will work well. The AG is on top of the polarizer. It's just a very thin layer. That's why it's easy to pull up the polarizer along with it. You could do two things here:

1. Continue pulling off the whole sheet carefully, then use a paper towel and water to soak the AG layer and remove it. You would then have a polar that you could reuse (you might have to remove the adhesive from the back though).

2. Remove the Polarizer. Then buy a replacement polar from Johnzo. You just have to be very careful not to trap air bubbles when putting it down on the LCD (use two people if neccessary).

Good luck!

David
The J
I figured I would need to by a new one, though at least for now it's still usable enough to test and get going. I'm a bit confiused about putting a piece of polarizer on the triplet, though. Wouldn't it be best to put the polarizer where the light is columnated? Wouldn't you lose some light if the polarizer were on the triplet since the light rays are angled to a point towards it, so that the angled light wouldn't pass through?

Gecko, so are you saying that I should remove the whole layer first, then soak it after I remove it? How would I go about removing the adhesive from the back?

Thanks for the help, guys! I'm very slowly building things up and hopefully I can get pictures (no camera for me) and a plog up here soon.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2008 Invision Power Services, Inc.