Thread: Xenarc...Sunglasses...Problem

Don't wear polarized sunglasses in the car?

I think most displays are like that intellaworks. I have that problem as well. Heck, I can hardly read my radar detector when I'm wearing my polarized lenses (fortunately the sound coming out of that thing is all I really need).

I don't have sunglasses that wrap around too much, so I can still see the screen out of the corner of my eye without too much effort, so i just stick to that.. Sorry I don't have a better solution.

monochromatic LCD's use polarizing films as part of the LCD (that's how people do the inverted colors thing, swapping for a film with different polarization direction)

now I don't know enough about color displays, but perhaps they use a polarized film as well, and that would explain the issue.

not that it would help you much, but does the display look any different if you hold the glasses at a different angle? I would think that if you got the polarization lined up on the glasses and screen, it should look relatively normal... but then you'd probably be holding your head sideways

I know this problem and it drive me nut.
Not only that but color Cell phone display also has the same problem.
And yet, LCD/Plasma TV also has this same problem too. That is the first thing that freak the hell out of me when I walk inside the house with a polarized sun glasses. WTF is wrong with my brand spanking new TV?

Same problem for me. I just chalked it up to polarized sunglasses. The screen has some kind of polarization on it.

Any LCD screen has a polarizing filter in it. This is simply the way it goes. Even with Computer monitor LCDs, watches... any of it. There's no way around it other than ditching the polarized glasses. Unless you can find the angle of polarization on your screen, and find someone willing to match it with your glasses..But, that'd be expensive, and probably quite hard to do..

So I'm really not going nuts here ? Seems like this is something that I just have to deal with, if thats the case then thats a major drawback for LCD touchscreens. Especially in cars, I guess I could wear normal sunglasses but darn it I really like my expensive high tech ones.

If you make an LCD screen that doesnt mess up while looking through polarized lenses you'd be a an instant millionaire... I'm sure the vehicle manufactures that have LCD's as the headunit stock are aware of this problem and if you make some sort of de-polarized glass or something (forgive me for my lack of technical terms with this subject) they'd probably put one in every vehicle.

Thanks for the responses folks !

The screen has of course polarization. That's simply how it works.

Liquid crystals only work by changing the polarization of the light they transmit.

W/o Volt in the lcd:
Light comes from the cold cathod, pass thru a first polarizer (say vertical) then thru the liquid cristal. Light remains polarized verticaly, it wont pass thru the second polarizer (horizontal) : that pixel is black.

W/ volt in the lcd:
when passing thru the liquid crystal, light's polarization changes. It was vertical, now it is horizontal, and then can pass the second polarizer: that pixel is enlighted. (color is just a filter)

When you watch your screen, all photon are polarized but human eye do not see polarization. WIth your glasses, well.....

wow...