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Re: Laptop Screen Problem

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On 11/17/2012 9:44 AM, the wharf rat wrote:
> In article<k8739t$db9$1@dont-email.me>, mike<ham789@netzero.net>  wrote:
>> On 11/16/2012 5:14 PM, the wharf rat wrote:
>>
>> Think you need to do some research on how LCD's work.  They're electric
>> field devices.  Yes, there is a relationship between electricity and
>> magnetism, but that ain't what's in play here.
>>
>
> 	If there's a moving electric field, there's magnetism.
>
> 	If "liquid crystals" weren't sensitive to magnetic fields then
> LCDs might not exist.  Vsevlood Freedricksz is credited with discovering
> the behavior; he discovered the Freedricksz transition by applying magnetic
> fields to films of liquid crystals.
>
> 	I'd rather you explained my error than just make snide remarks
> about how little I must know.  This is supposed to be a learning experience.
>
> 	When you put voltage into them, the dipoles line up, right? When
> dipoles align you get paramagentism, no?  Liquid crystals are para-magnetic
> as shown by Freedricksz...  Exposing an LCD to a sufficiently strong
> magnetic field WILL cause the crystals to migrate. Magnetic fields alter
> the flow of electrical charges.  What happens to the transistors in an LCD
> when you expose them to a strong magnet while they're turned on?
>
> 	If you can explain why an LCD wouldn't be effected by a strong
> magnetic field given this I'm sure I'm not the only one who'd appreciate it.

My sincerest apologies.  You are correct.  You cannot have a dynamic 
electric
field without creating a magnetic field somewhere in the universe.
And if that field is STRONG, anything can happen.

I'm confident that you and Mr. Maxwell can come up with equations describing
how LCD's work in magnetic terms.

I, however, will continue to use the simpler electric field model.
I'm just stubborn that way.

FWIW, here's an experiment I just ran.
Take the strongest magnet you can find.  I used one from a hard drive.
It's not the strongest magnetic field you can generate, but it did take
a pry-bar to get it off the refrigerator.
Set it on the display of your smart phone.
Report your results.
I saw no, zero, none, not any change in the display.
How about you?
>

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Laptop Screen Problem Enrie Membership <me2@privacy.net> - 2012-11-14 09:12 +0000
  Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-14 22:29 +0000
    Re: Laptop Screen Problem Bob_Villa <pheeh.zero@gmail.com> - 2012-11-16 04:15 -0800
      Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-16 18:39 +0000
        Re: Laptop Screen Problem mike <ham789@netzero.net> - 2012-11-16 13:52 -0800
          Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-17 01:14 +0000
            Re: Laptop Screen Problem mike <ham789@netzero.net> - 2012-11-16 20:20 -0800
              Re: Laptop Screen Problem Bob_Villa <pheeh.zero@gmail.com> - 2012-11-17 07:08 -0800
              Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-17 17:44 +0000
                Re: Laptop Screen Problem mike <ham789@netzero.net> - 2012-11-17 18:04 -0800
                Re: Laptop Screen Problem Michael Black <et472@ncf.ca> - 2012-11-17 22:30 -0500
                Cute magnet story (was: lcd blah blah blah) wrat@panix.com (the wharf rat) - 2012-11-18 18:46 +0000
                Re: Cute magnet story mike <ham789@netzero.net> - 2012-11-18 13:14 -0800
                Re: Cute magnet story wrat@panix.com (the wharf rat) - 2012-11-19 06:30 +0000
                Re: Cute magnet story ak621@chebucto.ns.ca (Richard Bonner) - 2012-11-24 22:44 +0000
                Re: Cute magnet story ak621@chebucto.ns.ca (Richard Bonner) - 2012-11-24 22:38 +0000
                Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-18 18:24 +0000
        Re: Laptop Screen Problem Bob_Villa <pheeh.zero@gmail.com> - 2012-11-18 16:10 -0800
          Re: Laptop Screen Problem wrat@panix.com (the wharf rat) - 2012-11-19 06:39 +0000

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