Headache Caused By LCD Monitor

  • Thread starter Thread starter bz
  • Start date Start date
B

bz

Hi,

I find out something interesting.

I cannot see if my Viewsonic is flickering or not with my bare eyes.
So, I point my digital camera to the screen. My camera can indeed see
flickering from my monitor. Light-dark-light-dark... etc... just like
turning the light on and off very fast.

If I set the shutter speed on my camera to 1/1000 second, I can really see
the flickering throught my camera.

Compared the LCD to my CRT, the CRT does flicker but in another way. The
CRT does not have the light-dark-light-dark effect. But instead, the CRT
has the scan lines scrolling up and down. The brightness remains constant.

Another insteresting thing is that if I set the brightness of the LCD
higher, it makes the flickering lower.
If I set the brightness all the way to 100, the flickering stops.

I think the ultimate question is that... Is this normal to any LCD monitor?

It is not possible that I have a defected monitor, is it not?
 
bz said:
Hi,

I find out something interesting.

I cannot see if my Viewsonic is flickering or not with my bare eyes.
So, I point my digital camera to the screen. My camera can indeed see
flickering from my monitor. Light-dark-light-dark... etc... just like
turning the light on and off very fast.

If I set the shutter speed on my camera to 1/1000 second, I can reall
see
the flickering throught my camera.

Compared the LCD to my CRT, the CRT does flicker but in another way.
The
CRT does not have the light-dark-light-dark effect. But instead, th
CRT
has the scan lines scrolling up and down. The brightness remain
constant.

Another insteresting thing is that if I set the brightness of the LCD
higher, it makes the flickering lower.
If I set the brightness all the way to 100, the flickering stops.

I think the ultimate question is that... Is this normal to any LC
monitor?

It is not possible that I have a defected monitor, is it not?
Click to expand...

It is possible, that you have a defective monitor, or you just did no
set up your video correctly!

But most LCDs work just fine.

You have posted under a different nick re. LCD monitors, complainin
about the same effect.
What's your beef?
You have received helpful advice, follow it or sell your LCD screen
and go back to CRT.
Or do you have shares in a CRT manufacturing plant?

If all of the above is wrong, then, I apologise, but, next time, spen
a bit more time and check out the pros and cons of the device, befor
you buy something you are not familiar with
 
If a camera is pointed at any screen it will appear to flicker, just watch
the TV when any PC screen comes into view.
 
Sounds to me that the method that is used to control brightness is done
by changing the "on" duration of the backlight, or "pulsing" the bulb.
At 100% brightness the bulb is never off and at 0% the bulb is never on.
Now you know what's doing it, so you may decide how to proceed.
 
Hi,

I find out something interesting.

I cannot see if my Viewsonic is flickering or not with my bare eyes.
So, I point my digital camera to the screen. My camera can indeed see
flickering from my monitor. Light-dark-light-dark... etc... just like
turning the light on and off very fast.

If I set the shutter speed on my camera to 1/1000 second, I can really see
the flickering throught my camera.

Compared the LCD to my CRT, the CRT does flicker but in another way. The
CRT does not have the light-dark-light-dark effect. But instead, the CRT
has the scan lines scrolling up and down. The brightness remains constant.

Another insteresting thing is that if I set the brightness of the LCD
higher, it makes the flickering lower.
If I set the brightness all the way to 100, the flickering stops.

I think the ultimate question is that... Is this normal to any LCD monitor?

It is not possible that I have a defected monitor, is it not?
Click to expand...

This is always normal whenever any type of camera is aimed at any type of
screen (PC or TV.) Just continue to watch the TV for the news and you should
see this occur whenever the TV crew shoots a screen. The camera and the
screen are usually not in "sync" with each other.
 
Hi guys,

I took my camera to my office to see if the LCD monitor (HP 1730) that I was
using had the light-dark-light-dark effect.

To be my surprise, NONE!!!! The brightness from the HP remains constant no
matter what. And I have never gotten any headache with the HP even I look
at it all day!!!

Ok guys! We have the winner here.

The answer to the ultimate question of life, the universe, and everything
is.... 42!!!

I am going to return this piece of $#!T.
Next time I will take my camera with me to the store.
 
I just find out that my HP 1730 does not have the light-dark-light-dark
effect.
And I have never had any headache with the HP in my office.
 
I personally can't use them either. They give me headaches too. I've tried a
few different ones too. So, until they come out with something different,
I'm stuck with my 100lb 22" CRT. :-(
 
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