Flicker free, PWM free computer monitors

I recently found out that most LED backlit LCD computer monitors use pulse wave modulation (PWM) to control the screen brightness. This rapidly turns the LEDs on and off to make the screen appear dimmer, instead of lowering the voltage and letting them steadily glow.

Interestingly enough, there are a lot of people who complain of health effects (eye strain, blurred vision, and headaches).  A few years ago, there were some posts on this group about it (http://es-forum.com/Anyone-here-flicker-sensitive-td1553876.html#a1553907).

Based on the web sites and forum posts I've come across, it sounds like most people have concluded that their problems are caused by the flickering light.  That makes sense.  However, some also complain of burning sensations, pressure in their head, dizziness, and difficulty concentrating, which mirrors the symptoms for electrohypersensitivity.  I suspect that these people may be affected by the rapidly changing electromagnetic field caused by the PWM, rather than the flickering lights.  

On the bright side, some monitors are now being made without PWM for controlling brightness:

http://www.tftcentral.co.uk/articles/flicker_free_database.htm
http://pcmonitorsguide.blogspot.com/2012/12/monitors-with-no-pwm.html

I haven't bought one yet, so I don't know how much of a difference any of these make.  And the power supplies most likely still use PWM, so they may not be a perfect solution. However, I wanted to pass this along, since it might be helpful.

It would be nice to check for dirty electricity/electromagnetic fields by bringing an AM radio into a store to see how much buzzing can be heard, but I have been unable to find any stores that carry these monitors.

Here are a couple of web sites that discuss the problem:

http://archive.is/LHath
http://lightsickness.com/


James

> On the bright side, some monitors are now being made without PWM for controlling brightness:
>
> http://www.tftcentral.co.uk/articles/flicker_free_database.htm
> http://pcmonitorsguide.blogspot.com/2012/12/monitors-with-no-pwm.html

Interesting!  I knew that LED monitors used high frequency flicker to control dimming, but
I wasn't aware that there were flicker-free alternatives!

(of course, I'm still using a florescent backlit monitor, and have always preferred to have
it dimmed instead of running it at full brightness)

Marc

Smart Meter Radiation From My Neighbors Became Intolerable And Drove Me To Write A Book

Posted by Lloyd Burrell on October 18, 2013 under EMF Books, Smart Meters


For Elizabeth it all started when the utility company started installing new electric meters in her neighborhood.

These weren’t just any meters they were installing, they were smart meters.

By smart meter I mean a utility meter fitted with an antenna that transmits energy usage to the utility company – in this case once a day.

Now here’s the thing, Elizabeth decided she didn’t want one. She opted out.

Her immediate neighbors, an elderly gentleman on one side and a young couple trying for a baby on the other, also opted out.

You’d think that would’ve made things pretty safe for her, right?

Wrong.

It Started With A Rash

Within days of the first smart meters being installed in her neighborhood an itchy rash started developing around her ankle.

A week later the rash was up her calf and covered half her thigh.

Two weeks later she’d a solid rash over her arms, legs, stomach and back.

The itch from this rash was so ferocious she couldn’t sleep.

Her doctor said it was scabies and gave her cortisone cream and pills.

This did nothing to stop the spreading or the itching.

The dermatologist said it was scabies and gave her ‘full body’ scabies medication – thankfully she decided not to use it.

She went from specialist to specialist, an allergist, an infectious disease doctor, and another dermatologist. Nothing worked.

Spontaneous Bleeding

By this time she couldn’t use a cell phone or a computer without bloody sores breaking out on her arms and legs within minutes.

Things got so bad her skin would start spontaneously bleeding whenever she was exposed to any from of EMF. Sometimes it bled so profusely she had to destroy clothes and sheets because of the heavy staining.

So she started to do her homework. Looking at the health complaints in Northern California she was astonished to see how many people had written about problems with skin rashes subsequent to getting a smart meter installed.

This is how EMFs brutally came into Elizabeth’s world.

This is what inspired her to write a book.

What’s In The Book?

It was smart meters and smart meter radiation that drove Elizabeth to write her book. But this is more than a book about smart meter radiation. Elizabeth is a researcher and that shines though on every page.

Part 1 of the book does an excellent  job of pulling the research together on the biological impacts of EMF exposures, with chapters on:

        • Electromagnetic hypersensitivity
        • Altered cellular functions
        • The brain
        • Alzheimer’s disease/CNS/AS
        • The Immune System and Cancer
        • Blood cells
        • Sleep and insomnia
        • Fertility
        • Diabetes, Anorexia and Tinnitus
        • Autism/behavior

The books also got a well filled out reference section so if you want to look further into the studies you can. It’s got some great explanatory diagrams, charts and visuals. This bring to life some of the technical explanations, without which some of this stuff might be hard to follow.

Parts 2 and 3 of the book are devoted to the solutions. Solutions are what interest me most. This is my only gripe really, it’s a little thin in that department.

Is This A Book For You?

I read everything I can get my hands on on this subject. There’s a lot to learn here and its well explained. Things like how our DNA acts as a fractal antenna but also that our spinal cord acts as a natural antenna.  Fascinating stuff.

The book exists in a paperback and kindle version and you can buy it through Amazon, click here for details.

If you’re suffering from smart meter radiation exposures, in certain cases smart meter radiation shielding can help.

Long term, comprehensive EMF protection is the only solution – click here to download my EMF Protection Free Report.

- See more at: http://www.electricsense.com/7064/smart-meter-radiation-emf-dangers-book/