How do you convert LCD screen size from CRT screen size?

[Caveman]

I keep hearing that a 17" LCD screen is actually bigger than it sounds -- in fact, "it's more like a 19" CRT". Can someone take the "more like" qualifier out of the equation and explain the way to quantify one screen size to the next?

Specifically, I'd like to know how a 19" LCD would compare to a CRT (of some size)???

 

[BigFatCow]

lcd screen sizes are the actual viewable and CRT sizes are for the whole thing with the bezel. Generally for crts you take what its rated as and subtract 1 inch to get the viewable screen size.

so a 19inch LCD would compare to a 20 inch CRT.

 

[rade]

An LCD screen is just as big as it sounds. A 17" LCD has a viewable screen of 17".

On CRT monitors however they measure the size of the cathode ray tube which produces the screen, not the actual viewable screen.
A 17" CRT has a tube with the size 17", but the actual viewable screen size which the tube delivers is usually ~1" smaller (my 17" CRT is for instance 15.94" viewable).

Large size CRT monitors may be even more deceiving, some 22" CRT monitors actually have only a 20" viewable screen size and some 21" CRTs have 19" viewable screens.

So, to answer your question, up to 20" the difference in comparable screen sizes is virtually always ~1" less for LCDs. For larger screens it's also mostly ~1" but in sometimes ~2".

 

[DaveSimmons]

In addition to the 1" extra "viewable image size" the "more like +2 inches" you've heard comes from the LCD pixels being a bit sharper / easier to read than CRT pixels. So a 15" LCD is technically one inch smaller than a 17" CRT (with v.i.s of 16") but generally accepted as being just as easy to read at the same resolution.

 

[Confused]

My 19" CRT is 18" visible, and one of my 17" CRTs is 15.5", the other is 15.75"


With LCD's, what it says is what you get, so a 15" screen is 15" visible etc


Confused