N

#### netwom

I am trying to understand how CRT RGB triads work as pixels and I have done

some simple geometry calculations.

Here is a nice webpage and have a nice picture showing the dot pitches.

I perfectly understand the definition of the horizontal dot pitch and

vertical dot pitch and diagonal dot pitch.

However, when it comes to some simple calculation, I got confused:

I have a LG Studioworks 995E CRT monitor, its max physical viewable size is

366mm x 274 mm, and its max resolution is 1600 x 1200, its diagonal dot

pitch is 0.26mm.

Horizontal dot pitch is 0.26*0.866=0.2252mm.

Vertical dot pitch, according to that article and many other article on the

Internet, equals the diagonal dot pitch, so it is 0.26mm.

366/1600= 0.2288mm/pixel, that's almost 0.2252, so I have no problem with

this result.

Now comes to the problem:

274/1200=0.2283mm/pixel, which is not the vertical dot pitch(which should be

0.26mm(see above)).

But 0.26mm, the vertical dot pitch, according to its definition, should be

the distance between two vertically adjacent pixels.

If that distance is vertical dot pitch and is 0.26mm, the maximal vertical

resolution will never be 1200, it should be 1054 pixels.

See the problem?

The factory claimed it to have a vertical max resolution of 1200 pixels, but

actually from the vertical dot pitch, it should only have 1054 pixels. So

the factory cheated?

Any thoughts? Please correct me if I am wrong!

Thank you very much,

-Net