LCD – For the Novice and the Expert
by Kristopher Kubicki on September 4, 2003 12:13 AM EST- Posted in
- Displays
Where do manufacturers get their specs?
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© VESA |
We worked closely with VESA and NEC during our last few LCD reviews to assure our testing procedures were correct. Unfortunately, it seems as if not all manufacturers adhere to the same standards. LCD substrates are always produced to a certain specification, whether it be 250cd/m^2 or 16ms, etc. These specifications are straight from the OEM (LG.Philips, AUO). However, manufacturers usually retest the final product after assembling all of the components (including bezel and stand). Sometimes, if the manufacturer ends up with a more desirable figure, that figure goes into the final specification.
| Brightness (cd/m2) | Colors | Contrast Ratios | |
| NEC 1760NX | 260 | 16,200,000 | 450:1 |
| ViewSonic VP171B | 260 | 262,000 | 500:1 |
| Hitachi CML174 | 260 | 16,700,000 | 400:1 |
| BenQ FP767 | 260 | 16,000,000 | 500:1 |
| Planar PX171M | 260 | 16,700,000 | 400:1 |
| AUOptronics (OEM) | 260 | 262,000 | 450:1 |
As you can see, there are some clear irregularities, even though all of these monitors are produced from the same panel. Our general rule of thumb is to find the OEM for every monitor we review. Thus, when we looked at the Hitachi CML174, we compared our specification expectations with that of the AUO specifications. On the next page, you will see a short table of how each test is conducted for LCDs.
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Anonymous User - Thursday, September 4, 2003 - link
A good article.I my self use CML174.Made a lot of difference to my eyes compared to CRT.
Anonymous User - Thursday, September 4, 2003 - link
Outstanding reading, thanks.mechBgon - Thursday, September 4, 2003 - link
Nice work, Kristopher. : )KristopherKubicki - Thursday, September 4, 2003 - link
#5 fixed it - sorry.#7 fixed that one too. Yeah rubbing pixels really doesnt do much good. I think NewEgg is going to be pissed when they find out I messed up their monitor pretty good.
#6 Say it aint so!! We want to be the only ones ;)
Kristopher
Shalmanese - Thursday, September 4, 2003 - link
Finally! It took long enough for you to get this out :). Great article, finally an article about LCD's which isn't full of opinion and hearsay.dvinnen - Thursday, September 4, 2003 - link
ok, maybie you did mean that. Hard to tell, you say you scuffed the monitor, then go on to tell other people how to do it...I problay just need some sleep...
dvinnen - Thursday, September 4, 2003 - link
Rubbing the pixils does more good then harm then?<<<Personally, it seems that rubbing the pixels does more good than harm so continue at your own risk.>>>
Might want to fix that one
dvinnen - Thursday, September 4, 2003 - link
good to hear it. Seems like alot of the hardware sites are getting there act together.Anonymous User - Thursday, September 4, 2003 - link
On page 6, where you talk about the cables in the picture (the sentence right below the picture), shouldn't the good cable be the *upper* one or am I missing something?KristopherKubicki - Thursday, September 4, 2003 - link
Yeah, new editors and kind of a revamped AT staff. We went through a lull period after we lost Matthew, but now we have some really good writers and a lot of great content to write about.Just wait till Computex and COMDEX - 3 and 4 reviews per day sounds about right.
Kristopher