Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Xenarc...Sunglasses...Problem

  1. #1
    FLAC IntellaWorks's Avatar
    Join Date
    Jun 2004
    Location
    NH
    Posts
    1,173

    Xenarc...Sunglasses...Problem

    Thanks for taking the time to read my post. This maybe a weird problem however I think that it may be a possible design "flaw" in xenarc or any LCD screen for that matter.

    I just finished the install of the xenarc 7" TSD lcd with a custom bezel in my truck. Things were fine and dandy for about two weeks because it rained here for 14 days straight lots of cloudy weather.(yuck)

    The first sunny day I wore Polarized sun glasses (because I'm a fisherman at heart) When looking at my LCD through the glasses I could barely see the LCD screen. It wasn't that I couldnt see the screen because of the darker image my eyes get when looking through the glasses. But if anyone with polarized glasses has ever seen a "film" on the windsheild of on comming cars (especially vans). This is exactly what I see when looking at my LCD.

    For those that have never seen this I'll describe what I see the best I can.

    A multicolored film over the xenarc touchscreen that basically blocks any chance I have to see whats actually on the screen.

    Using regular sunglasses, I can see the screen noproblem.

    So what the crap ?
    Progress [I will seriously never be done!]
    Via EPIA MII
    512MB RAM
    OEM GPS (embedded)
    nLite WinXP pro on
    1GB Extreme III CF card
    Carnetix 1260 startup/ DC-DC regulator
    Software: Still, re-Writing my existing front end in .Net

  2. #2
    Variable Bitrate
    Join Date
    Jan 2004
    Location
    Jersey/NY
    Posts
    436
    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.

  3. #3
    FLAC evandude's Avatar
    Join Date
    Mar 2005
    Location
    Maine
    Posts
    937
    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
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
    eegeek.net

  4. #4
    MySQL Error MatrixPC's Avatar
    Join Date
    Sep 2003
    Location
    Beach City, Socal
    Posts
    4,053
    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?
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER

  5. #5
    Admin. Linux loser.
    Auto Apps:loading...
    Bugbyte's Avatar
    Join Date
    Sep 2004
    Location
    Corning, NY
    Posts
    7,359
    Blog Entries
    2
    Same problem for me. I just chalked it up to polarized sunglasses. The screen has some kind of polarization on it.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  6. #6
    FLAC Jahntassa's Avatar
    Join Date
    May 2005
    Location
    Conyers, GA
    Posts
    1,417
    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..

  7. #7
    FLAC IntellaWorks's Avatar
    Join Date
    Jun 2004
    Location
    NH
    Posts
    1,173

    Ahh so I'm not going nuts !

    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 !
    Progress [I will seriously never be done!]
    Via EPIA MII
    512MB RAM
    OEM GPS (embedded)
    nLite WinXP pro on
    1GB Extreme III CF card
    Carnetix 1260 startup/ DC-DC regulator
    Software: Still, re-Writing my existing front end in .Net

  8. #8
    Maximum Bitrate DeltaFX's Avatar
    Join Date
    Sep 2004
    Location
    France
    Posts
    499
    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.....

  9. #9
    FLAC IntellaWorks's Avatar
    Join Date
    Jun 2004
    Location
    NH
    Posts
    1,173

    .

    wow...
    Progress [I will seriously never be done!]
    Via EPIA MII
    512MB RAM
    OEM GPS (embedded)
    nLite WinXP pro on
    1GB Extreme III CF card
    Carnetix 1260 startup/ DC-DC regulator
    Software: Still, re-Writing my existing front end in .Net

  10. #10
    FLAC PatO's Avatar
    Join Date
    Dec 2000
    Location
    Afton MN
    Posts
    1,120
    Some company made a notebook a while back with a unique "privacy" feature - they simply didn't add the top layer of polarizing film! (or something like that) It appeared to be a blank screen to anyone happening to glance at it, but put on polarized glasses and everything was clear!

    So, get a razor blade out and peel off the polarizing filter! (remove the t.s. first, of course) And make sure your glasses are polarized in the same way the top layer is on your LCD (vertical or horizontal). Most glasses and camera lenses use circular polarization - which would cause really funky effects!
    http://www.jeepmp3.com/
    CarPC Stolen. Starting over.
    Ne1 recognize the avatar?

Page 1 of 2 12 LastLast

Similar Threads

  1. problem with 800x600 with xenarc 7"
    By shiltz in forum LCD/Display
    Replies: 13
    Last Post: 02-13-2005, 02:09 AM
  2. Problem with Xenarc TS
    By bluehcc in forum LCD/Display
    Replies: 1
    Last Post: 01-19-2005, 01:13 AM
  3. Blurry Xenarc Problem
    By Lord_Pall in forum LCD/Display
    Replies: 9
    Last Post: 12-24-2004, 09:26 PM
  4. Xenarc 700YV Problem
    By Sivion in forum LCD/Display
    Replies: 0
    Last Post: 12-04-2004, 06:46 PM
  5. Xenarc 7" Touchscreen VGA Group Buy.
    By Skippman in forum LCD/Display
    Replies: 144
    Last Post: 07-27-2002, 11:52 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •