Posted by Marc Martin on
URL: https://www.es-forum.com/re-Quaixeman-s-computer-tp1540077p1540078.html

> Did you also take electric field readings? If you are using this
> computer plugged in to public power with a transformer, I am sure that an electric
> field meter will show you are being exposed to a tremendous electric field,

Yes, LCD monitors are deceptive when they give a "zero" reading on a magnetic
field meter, because they have quite large electric fields.

I have found that LCD monitors also make me more sensitive to florescent
lighting. If I use CRT monitors during the day, I do not notice any
florescent lighting. However, if I use an LCD monitor, I notice the
florescent lighting found in stores, at work, etc.

Note that besides the AC->DC transformer that you often see as part
of the power cord, LCD monitors also contain inside the monitor itself
a DC->AC inverter (!), because the florescent backlight requires AC
power to function. So you've got two transformations taking place --
AC->DC, then DC->AC!

I'm hoping that future technology will lessen these concerns -- there
do exist computer monitors which use light emitting diodes for the
backlight and also as the main source of light ("OLED"), but so far
I don't believe there is anything that is commercially available
for a reasonable price.

And of course, I don't know if light emitting diodes will be an
improvement over florescent lighting or not.

Marc