"Doc" wrote in message
Could you translate that into english. π
So which are you saying is easer on the eyes?
A white area on a CRT, let’s say 100cd/m2, 1024×768, 70 Hz, is in fact created by a horizontal bar which consumes 1/50 of the height. This bar moves from top to bottom 70 times per second.
The luminance of the bar is 50 times larger than the average screen luminance: 5000 cd/m2. This is a rather strong invisible flicker.
IMO, the neuronal system is not well prepared for the exposure to such an artificial stimulus.
An additional problem: the maximal detectable frequency is in the region of 40Hz or half the flicker frequency of the monitor. This may cause internal aliasing effects.
Scientific publications are rare.
A discussion about:
http://tinyurl.com/3863qa
Best regards –Gernot Hoffmann
recently replaced (cheap KDS FLAT) 19 inch CRT, that fried itself into blurriness, I had always used it on highest refresh rate (85). Replaced with 19" LCD Samsung 971P (not the cheapest but had contrast ratio I wanted)
I was thinking I had to get another CRT but went shopping and saw the improvements to LCD and changed my mind
never got headaches from either (get shoulder/neck/back tension from mousing often)
BUT I do not notice as much eye strain with LCD (for me this is experienced as dry itchiness in eyes,not headache)
My first LCD has very decent viewing angle range (important to me to show my work over shoulder to others)
Has good contrast ratio (1500 to 1) (usually only in higher priced models) decent speed 6ms redraw rate (I do FPS games)
matches my printer with not much changes to settings on same OS and install as the CRT
looks nicer
takes less space
it rotates!!! (love that)
lacks manual controls (do not need them) and the software is not perfect but decent
it has USB ports on the side, so you can put peripherals on the other side of your desk if you like
(Magic Rotate refuses to shut down when I want to, end program comes up. It may be in conflict to ATI vid drivers as they have some shared functions like rotate that clash.
But if you don’t use the SAMSUNG prog, when you rotate with the vid driver the mouse does not orient to the new direction and you can’t use it properly.)
Good advice for any comp users:
rest eyes at least once an hour, look to infinity and stretch your vision to look into the distance, close them and rest them!!!!! use eye drops for moisture if they get dry.
MOST IMPORTANT please work in a dimly lit room!!!! cannot overstate how much this affects your eyes, make sure no reflections are on your screen from backlight!!!!!
stretch arms shoulder neck FREQUENTLY
use leg rests too if your legs are dangling or pressing on your chair edges.
get massages and go to chiropractor if you can….
The really good monitors are so expensive, I have never been able to own an EIZO or similar high end
there are some companies that still make hi quality CRT but I needed to replace fast and had to buy local.
After searching my options CRT were not to be found in good selections or qualities in stock at local retailers. I had a Samsung before my KDS and it lasted forever so I trusted the brand, and saw good reviews.
To translate above
take a photo or vid of your TV set or CRT
you will see a horizontal band moving up the frame
normally invisible to your eye because it is so quick
but a camera can capture this "swipe"
you brain however is affected by it’s frequency, and it does cause eye strain