Black/White Uniformity And Viewing Angles
Acer S231HL Bid
While the S231HL Bid can’t achieve our standard 200 cd/m2 after calibration, the experience it delivers is complicated by slightly poor white luminance uniformity. With the exception of the lower right-hand corner, the values that we measured are lower than the center of the screen, which leads to a vignetting effect.
Separately, Acer's choice to employ TN technology is particularly evident in the bottom row of pictures. From low vertical angles, the screen appears washed out.
| Acer S231HL bid | ||
|---|---|---|
| White Luminance cd/m^2 | ||
| 139.5966 | 154.6733 | 153.2672 |
| 143.1036 | 165.7612 | 154.9442 |
| 152.6986 | 169.1083 | 165.1925 |
| Black Luminance cd/m^2 | ||
| 0.7307 | 0.7106 | 0.6318 |
| 0.6327 | 0.5840 | 0.6193 |
| 0.7703 | 0.8120 | 0.7390 |
Dell S2330MX
With the exception of its above-average color production, Dell’s S2330MX exhibits the typical weaknesses of other budget-oriented TN-based displays. Like the S231HL Bid, white uniformity is poor, but the problem isn’t as noticeable thanks to calibration. Even so, its picture still appears washed out from low vertical angles.
| Dell S2330MX | ||
|---|---|---|
| White Luminance cd/m^2 | ||
| 187.4039 | 174.1443 | 167.1880 |
| 169.4942 | 197.2808 | 157.6985 |
| 178.5247 | 161.2816 | 162.2522 |
| Black Luminance cd/m^2 | ||
| 0.3183 | 0.1676 | 0.2184 |
| .3017 | 0.1927 | 0.2665 |
| 0.2349 | 0.1475 | 0.1927 |
LG IPS236V
LG’s IPS236V exhibits the best uniformity of the bunch, and viewing angles are excellent thanks to its IPS panel. However, contrast remains low because we’re unable to achieve deep black production.
| LG IPS236V | ||
|---|---|---|
| White Luminance cd/m^2 | ||
| 200.8004 | 212.3469 | 192.1041 |
| 189.7031 | 213.3274 | 180.4633 |
| 186.9778 | 193.9527 | 192.9520 |
| Black Luminance cd/m^2 | ||
| 1.2908 | 1.1216 | 1.6251 |
| 1.1479 | 1.0553 | 0.9956 |
| 1.3664 | 0.9991 | 0.9492 |
Samsung S23A550H
Even though the S23A550H suffers from poor contrast, Samsung achieves pretty good uniformity considering its TN-based panel. When we view the screen from lower vertical angles, there is minimal washout.
| Samsung S23A550H | ||
|---|---|---|
| White Luminance cd/m^2 | ||
| 180.0246 | 188.7714 | 177.9484 |
| 192.4707 | 201.6051 | 176.2663 |
| 209.0496 | 189.6473 | 196.2824 |
| Black Luminance cd/m^2 | ||
| 0.8288 | 0.6377 | 0.8420 |
| 0.9698 | 0.7236 | 0.7831 |
| 1.0248 | 0.6644 | 0.7024 |
I thought the LG used not S-IPS but e-IPS, 6 bit + AFC. I actually thought it was almost identical to the CCFL backlit Dell U2311H (except the module is for LED backlight in the LG's case, not CCFL).
I guess I was wrong.
^ I mean the panels, not the two monitors themselves.
Im not sure if that input lag test is accurate.
Why dont you guys test it the usual way? with a CRT monitor side by side running a timer (with ms ofc) and take some photos?
why no review a viewsonic monitor they have a 150$-180$ monitor with these same specs
Also noticeably absent is the ever popular ASUS brand. I don't have one myself, but it seems a lot of people do. Would have been an interesting comparison.
Can anyone tell me why the prices haven't dropped? i bought my asus 24" screen 2 years ago for 178$
I thought the LG used not S-IPS but e-IPS, 6 bit + AFC. I actually thought it was almost identical to the CCFL backlit Dell U2311H (except the module is for LED backlight in the LG's case, not CCFL).
I guess I was wrong.
LG's QA website.
I own the LG IPS236V, and I find your numbers completely non-believable. The contrast ratio is not that abysmal, and it can reproduce decent (though not the best, I admit) blacks. Also, on a review of the IPS226V, while being the 22" model, it is otherwise identical, and DigitalVersus found it to have a contrast ratio of over 1000:1. I'm wondering where the huge disparity in numbers is coming from, and I don't think it's DigitalVersus mussing things up.
Question: did you go into the Menu > Picture and change the Black Level setting to Low? It defaults to High for some unknown reason, and at that setting the blacks are indeed terrible. At Low, the blacks are much, much better, and the slight decrease in white levels isn't much of an issue given that this is an extremely bright monitor.
Also, what was the Gamma setting on the IPS236V?
I own the LG IPS236V, and I find your numbers completely non-believable. The contrast ratio is not that abysmal, and it can reproduce decent (though not the best, I admit) blacks. Also, on a review of the IPS226V, while being the 22" model, it is otherwise identical, and DigitalVersus found it to have a contrast ratio of over 1000:1. I'm wondering where the huge disparity in numbers is coming from, and I don't think it's DigitalVersus mussing things up.
Question: did you go into the Menu > Picture and change the Black Level setting to Low? It defaults to High for some unknown reason, and at that setting the blacks are indeed terrible. At Low, the blacks are much, much better, and the slight decrease in white levels isn't much of an issue given that this is an extremely bright monitor.
Gamma set to 2.2. We did set to low. And as you know we measure luminance (nits) not illuminance (lux). Maybe this unit sat in the review pool too long... Not sure, but those were the readings that we achieved.
Please test also the absolute input lag of a CRT (you only have to do it once, I guess) for reference.
I've noticed that Tom's seems to be focussing its attention on 23" 16:9 monitors. For the previous 3 years the most commonly advertised large monitors were 24" 16:9 with a noticable number of 24" 16:10 panels in the mix. I upgraded from a 19" 4:3 monitor 2 years ago to a 26" 16:10. At that time the market seemed to be flooded with 16:9 monitors.
I have a friend with a 26" 16:9 monitor and he always wishes he had followed my choice for the vertical real estate gain. Going from 1080 pixels to 1200 pixels is just over 11% more space. That means MS Office can display two A4 pages side by side at life size even with the 'ribbon' showing.
When gaming, the 1920x1200 resolution gives a greater feeling of being there due to the extra vertical space whilst maintaining the 'widescreen' ability to keep eye-attention.
It seems that the computing world is beginning to be dictated to by the panel manufacturers who are geared for widescreen TVs in the same way that 4:3 computer moniters were originally just converted TV tubes. I have spent a lot of time in front of computer monitors over a great many years and I have found the 16:10 format to be the most satisfying to the eyes and the best for productivity.
With these points in mind it seems that the computing industry is on the verge of losing a significant asset in the 16:10 format.
Therefore,
Toms Hardware will you please investigate the availability and future of this format.
Q
Tom's hardware readers are mostly developers who need 16:10 (extra vertical space) not 16:9 (for movies). I would like to see 16:10 monitors reviewed.
I'd like to add to the call for reviewing 16:10 monitors.
I love my 1920x1200 Samsung 2443BW but worry that when it needs replacing there won't be any affordable replacements. Tom's can't tell manufacturers what to do but perhaps more reviews would result in more sales and hence more interest in making 16:10 displays.
Can anyone tell me why the prices haven't dropped? i bought my asus 24" screen 2 years ago for 178$
it reached the lowest price point. you can't expect to buy an LCD for 1$.
remember CRT TV's. they were produced for over 50 years, yet the price remained the same for several years after reaching a certain minimum.
It will be the same with OLED and AMOLED. currently you can buy a 17" OLED for 4k$. in some years in the future you can buy a 24" OLED for 178$. Just like you did for your LCD.
I suspect the truth is - a display is a display is a display. For all but the very specialised applications
around - they are probably all more than good enough. I'd rather someone warned me that my
black samsung bled light round the edges - had a dark "reflected shaddow" along the top edge of the image about 4mm down if it was slightly higher than my eyeline (caused by the shiny black plastic case - not as I originally thought - by dead LCD electronics - its a weird effect)
I'd like reviewers to get out of the tech details and into the real world.
Another example of this is video cards. I neither know nor card how they work. For all intents
and purposes the only reason to have a better graphics card is to play games. Very little else
has any reason these days.
And I dont want to know how many pixels a second in mode 2 with X operaing system and Z memory
it can do.
I want to know where the new card sits IN RELATION to my existing card for ease of play.
Nothing else anyone says helps me choose. And no one seems to do that.
I read the review here this week to see if upgrading my GT320 card would play Far Cry better.
I still havn't the faintest idea. Not a clue. I'm getting the sense that others are reluctant to upgrade
just to get the newest thing on the block these days too. Just because its newer and even performs better doesnt mean its worth having.
And guess what. I design electronics for a living so I'm not dumb to tech talk. So whats the point?
Lets have reviews targeted at users not specification matching.
lol...
Why not buy ASUS 24" LED monitor over these? The picture quality is better and you can get it less then $200 sometimes on New Egg.
There have been some new 1920x1200 monitors released in the last 6 months, so the format is far from dead.
Why arent more monitors shipping with DisplayPort? need more non legacy displays out there for Eyefinity/Nvidia Surround!