Notices
Results 1 to 5 of 5

Thread: LCD from my old watch...

  1. #1 LCD from my old watch... 
    Forum Freshman Sudhamsu's Avatar
    Join Date
    May 2008
    Location
    New Delhi, India
    Posts
    95
    I bought a new watch after my old one's strap got broken. I opened the "watch" part of the watch and took out the LCD display. Here it is...



    The upper one is the glass/plastic thingy. And the lower one was beneath the upper one in the "arrangement" (and isn't a part of this question). The thing is, when I press the glass/plastic one on its surface a liquid-rainbow kind of thing appears (one like you might have noticed a million times on LCDs), and when I touch the upper and lower edges of the glass/plastic, it lights up! I mean I see digits and other symbols on it as if the watch is still working just like before I tore it apart! And also it shimmers when viewed from different angles

    You guys got any explanation??? I really need to know why this is happening!!!

    I'm checking more about LCDs in the meanwhile...


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Freshman Sudhamsu's Avatar
    Join Date
    May 2008
    Location
    New Delhi, India
    Posts
    95
    some one??? anyone???

    is there no one here who can explain this?

    please reply...

    could it be that electricity from our body might charge the screen for a moment??


    Reply With Quote  
     

  4. #3  
    Moderator Moderator Dishmaster's Avatar
    Join Date
    Apr 2008
    Location
    Heidelberg, Germany
    Posts
    1,624
    Be patient. The forum is not there for you alone.

    I guess, it has to do with squeezing the liquid into the pre-defined cavities rather dragging it with an electric field. But I'm not sure. You can falsify your hypothesis by touching it with something else than your hand. Maybe, you will find something here.
    Reply With Quote  
     

  5. #4  
    Moderator Moderator Janus's Avatar
    Join Date
    Jun 2007
    Posts
    2,074
    LCD displays work by placing a nematic fluid between two electrically charged plates driven by a square wave. When the charge is directed across a given segment, it changes the shape of the molecule making up the fluid, which in turn changes how the molecules react to light. In the undistorted state, the molecules reflect light and look silvery. When distorted, they absorb light and look black.

    Many nematic fluids are also sensitive to pressure, so when you press on the display, you are distorting the molecules and forcing them into the light absorbing state.
    "Men are apt to mistake the strength of their feelings for the strength of their argument.
    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


    Edit/Delete Message
    Reply With Quote  
     

  6. #5  
    Forum Senior Booms's Avatar
    Join Date
    Sep 2008
    Location
    The perceptual schematic known as earth
    Posts
    361
    there is a fluid inside the LCD that is pulled around by electomagnetic forces from the watch, much like iron fillings can be moved around paper with a magnet below


    it will also move if you squash the screen which is what your doing
    It's not how many questions you ask, but the answers you get - Booms

    This is the Acadamy of Science! we don't need to 'prove' anything!
    Reply With Quote  
     

Bookmarks
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
  •