Why white dots appear after replacing the polarizer?
Hi everyone, I've a question for everyone that refurbish LCDs as a living.
When I refurbish iphone's LCDs I always remove the polarizer to speed things up, I clean very well the LCD to make sure there's no dust or streaks on it and then I apply a new polarizer film.
When I test the phone everything works great except for the fact that 9 times out of 10 I see very small white dots on the screen (you see 'em very well when you have a black image to see).
I read on the internet that small particles of dust "block" the light coming from the backlight and so you see a white dot (the same you'll see with no polarizer on the LCD but much smaller of course).
Now the question is: is there a way to avoid having this issue?
I know in China sell a dust free room to laminate polarizer and OCA films on the LCDs but I think paying more than 500USD for a simple metal bench with a fan spinning with a tent surrounding you is a ripoff.
Using compressed air did not help.
Thanks in advance
Is this a good question?