Display Question

**no1_vern** · December 18th, 2002, 10:11 AM

Whenever I checked a monitor it stated that the "dot pitch" to .XX(.22, .26, etc) mm of a trio of 3 dots is basically a circle.

While checking out prices I found this description of a new monitor with a (Quote): "0.20mm dot pitch (Horizontal), "

Can anyone tell me what the difference is?? Because my best guess is they are cutting of 1/3 of the normal measurement by measuring across only 2 dots instead of 3, CORRECT??

Thanks in advance,
Vern

**dunbar** · December 18th, 2002, 10:15 AM

yep, marketing ploy to make their product look good. Ask them for the triad dot pitch.

**EvilRick** · December 18th, 2002, 10:20 AM

Usually, a lower dot pitch means a sharper image.
Now, CRT manufacturers are using the horizontal dot pitch, instead of the diagonal dot pitch. The diagonal tends to be higher in value, which is what we're used to seeing in specs. See if you find out what the diagonal dot pitch is. If I did the math right, I think it will be about .23mm.

**dunbar** · December 18th, 2002, 10:24 AM

http://www.techadvice.com/tech/M/Monitors.htm

**no1_vern** · December 18th, 2002, 10:28 AM

Thanks dunbar, EvilRick!

You guys are moving fast this morning.

That was what I was thinking. I will ask. Maybe they will actually answer.

Vern

**GoSharks** · December 18th, 2002, 07:39 PM

This is NOT a marketing ploy as Dunbar suggests. Also the information in the link is inaccurate. The colored phosphors of a shadow mask line up neat columns just like an aperture grill.

Here is a much better description

In General the smaller the dot pitch the finer the image can be. The most common measure of dot pitch is the diagonal dot pitch. This is the “center to center distance between adjacent same color phosphor dot as measured in millimeters.” The diagonal measure factors both the horizontal and vertical distance between the dots and thus is an excellent measure.

While the diagonal dot pitch has historically been the measurement standard, it doesn’t work for aperture grill monitors. Aperture grille is constructed using a series of “stripes” instead of dots. Thus, there is no diagonal measure and aperture grille manufacturers quote the “stripe pitch” also known as the horizontal dot pitch. Obviously this is a shorter measure and shadow mask manufacturers responded by publishing their horizontal dot pitch to allow consumers to accurately compare between the two technologies. The horizontal measurement is an apples to apples comparison.

Jim Witkowski
Chief Harwdare Engineer
MonitorsDirect.com

**no1_vern** · December 19th, 2002, 01:03 PM

Originally posted by GoSharks

Obviously this is a shorter measure and shadow mask manufacturers responded by publishing their horizontal dot pitch to allow consumers to accurately compare between the two technologies. The horizontal measurement is an apples to apples comparison.

Jim Witkowski
Chief Harwdare Engineer
MonitorsDirect.com

Jim,

Should the DOT PITCH (not stripe pitch) be measured horizontally, instead of diaganoally?

The ad said the "dot pitch" was measured horizontally. NOT the stripe pitch.

**GoSharks** · December 19th, 2002, 01:07 PM

Yes, like I said in my first post, the Horizontal measure is the only apples to apples comparison.

Jim Witkowski
Chief Hardware Engineer
MonitorsDirect.com