[Disposition96]

Hey,

Hopefully this will be an easy question, I have done a bunch of research but am not satisfied...

CRT's work off refresh rates, anything below 70 Hertz (60 ex) seriously strains the eyes and over time causes glasses. xD

LCD however the Hertz doesn't apply and having a 40 Hertz monitor won't really hurt your eyes as it's more so the lights response time that matters and that's about it?

Am I understanding this right? I just don't want to strain my eyes more so than I have to and want to know the facts.

REgards,

[alex]

No.

The response time refers to the time it takes a pixel to go from one colour to another (usually black to black as it produces artificially faster response times that manufacturers can shout about on web pages).

The refresh refers to the monitor 'drawing' an image.

TFT's natively support progressive (digital, as in dvi) refresh which means the lines are updated one after the other (vga, or analogue, updates every other line).

The frequency of this refresh is the hz figure you mention.

[Disposition96]

So having it at 40Hertz is bad on an LCD? :S

I've read many things and they all seem to indicate the other way...

Regards,

[Carbon]

Essentially, there is no such thing as refresh rate on a LCD - at least not the same thing as a CRT. 40hz is perfectly acceptable, what you want to look at is the response time.

LCDs do not have a problem with this as each pixel stays opaque and does not need to be re-illuminated because of the electron beam dimming like a CRT. The backlight will continue to illuminate that pixel. CRTs need to move the electron beam up and scan across through the length of the display to illuminate the pixels more than once per frame or dimming occurs - with a continuous backlight, this is no longer the case.