03-23-2009 03:27 PM - edited 03-23-2009 03:41 PM
Another piece of evidence to support the notion that these LED LCDs are manufactured by Hydis:
Perhaps someone with knowledge of the power requirements of the panel and tablet can make a couple of inferences here. It's a long shot, true enough, but perhaps one way to uniquely identify this LCD panel. After all, owners of this system should be interested in who makes what's in an expensive piece of equipment.
03-24-2009 08:52 AM - edited 03-24-2009 09:12 AM
I'd be extremely surprised if Samsung has anything to do with this panel...
Even going back to the old TN days of DBU vs. ID Tech vs. Samsung, their panels were the ones you didn't want to have on your ThinkPad...horrible viewing angles, uneven/bleeding backlight, pitiful colour reproduction...and judging by my last WUXGA T61p they haven't gotten any better...while even Hydis TN panels (have one on my 14" T42p) are acceptable at the very least...
Having owned every single IPS/AFFS-equipped ThinkPad prior to X200T (some of them in ridiculous quantities) I can't see Samsung getting out of its decades-old niche of producing bottom-of-the-barrel LCDs and actually aiming for quality...
Not to mention that the first tablet with a WXGA AFFS LCD (Fujitsu) sported a Hydis panel as well...
03-24-2009 08:59 AM - edited 03-24-2009 08:59 AM
I agree with you, George. I just can't see Samsung connected in any way with this panel--it's a superb LCD. The thread I mentioned earlier at notebookreview suggests otherwise, but as I mention there, all to this point is conjecture and guesswork. While it'd be nice to have concrete confirmation that this is a Hydis panel, I don't think that's forthcoming barring disassembly, so I'm going to call your answer a solution. I'm certainly not going to lose sleep or worry over this, but it's vexing that Lenovo cannot publish precise specifications of its equipment, particularly in one of its most capable x series machines.
I'll close with the cliche that at times, such is life, and thank everyone for their time and effort. I'd like to see a definitive resolution--yes, this is a Hydis panel, and here's the spec. sheet--but George has satisfied my curiosity.
03-24-2009 09:24 AM - edited 03-24-2009 09:25 AM
I understand that you have the utmost belief that it is in fact a Hydis panel. I am not one to argue on who manufactured the panel. I am simply going by facts.
03-24-2009 09:49 AM
If you can provide a link that shows this specific LCD is made by Samsung, then that's fine. All that has been posted, here and in the thread at notebookreview, is conjecture and guesswork based on model number and manufacturer code sequences that closely resemble that of this panel. I've been nothing but appreciative of your efforts. Given the fact that there is no Samsung specification sheet for this panel and ajkula66's input on the history of IPS, Flexview and AFFS panels, it's reasonable to say this is a Hydis panel.
03-24-2009 10:12 AM - edited 03-24-2009 10:13 AM
03-24-2009 11:58 AM
03-24-2009 01:17 PM
Well, honestly I don't know where the overall problem in tagging the 12.1" LTN121xx-xxx panel line is. As others correctly told the initial poster before LTN is the main identifier for Samsung LCD panels. BTW, these are all Samsung 12" panels...
LTN121AP01 LTN121AP03 LTN121AT02 LTN121AT03 LTN121W1-L03 LTN121XF-L01 A01 LTN121XJ-L02 LTN121XJ-L02 X12 LTN121XJ-L07
The LTN121AP03 model line is possibly one of the newer ones, you can actually find offers of these panels from a chinease TFT-LCD supplier (search for LTN121AP03 on the below referenced sites):
You can even find those panels offered at Ebay in Hong Kong. You can also find some vague infos about that panel on some asian Thinkpad sites.
And in case you don't believe what others are telling you about that LCD panel contact some institution like DisplaySearch and make or pay for a research. Alternatively you can contact ScreenTek etc. and ask them for an panel identification help.
03-24-2009 03:32 PM
The last Chinese site that you've linked shows the picture of a parts info, with a X200T CCFL panel identified as a Hydis one... unfortunately, I don't speak Chinese so I can't make much of that thread altogether...
So once again, CCFL=Hydis, but LED=Samsung?
I'm not saying you're wrong, but it makes zero sense to me in the light of everything else involved...
Before you call my statement a rant, you may want to do some research on how Samsung compares to other panels, be it on T61/p or on other models...and see where I'm coming from after having owned a four-digit number of ThinkPads...
03-24-2009 05:05 PM
Nowadays all the major panel producers have also focused on producing LED based panels and Samsung, as one of the biggest LCD panel producer beside LG-Philips, is no exception here. Related to IPS (in-plane switching) LCD panels, this technology was unveiled in 1995 and was put to practical use in 1996 by Hitachi, since then it has evolved into Super-IPS, AFFS and Advanced-Super IPS through to IPS-Pro etc.
In former ThinkPad times there have been only certain 15" 4:3 SXGA+/UXGA/QXGA IPS panels available for ThinkPads, the so called FlexView panels, which came mostly from IDTech (a merger of the Chi Mei Group and IBM) and later from LG-Philips als the main LCD panel suppliers. However, those times sadly have gone and when the 12" TabletPCs area established on the market, Boe Hydis was able to offer 12" IPS/AFFS LCD panels in quantity with/for build in digitizers.
Of course there are also still some smaller and bigger sized IPS panels available on the market, the smaller ones are used partly for digital still cameras and other smaller devices, the bigger ones in good, far more expensive desktop LCD monitors and LCD TVs nowadays. - However, the overall sad point is that in the notebook LCD segment the overall tendency has gone over to the dominating (crappy) widescreen TN panels, but even if that wouldn't be sad enough, we nowadays mostly live also in that glossy (makeup mirror) area, at least in the consumer notebook segment.
But back to topic, as said before Samsung is one of the big guys in the LCD panel supplier segment and they are also focusing on the evolving LED panel segment. Since Samsung is producing a bunch of PVA panels, among those also 12.1" PVA panels, I pretty much believe that it is one of their newer 12.1" widescreen panels.