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2032 Posts

11-28-2007

Czech Republic

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Re: When do we finally get a good screen? (P50 4K)

2016-06-29, 23:43 PM

wrote:

 

As far as the birghtness shifting, almost all Sharp IGZO screen have this shift.


This is an old trick how to save on backlight luminance. By saving on panel layers you get higher brightness in direct view but it is getting worse with increasing viewing angle. Again, I can accept it in a $400 laptop but saving a $20 to get better display/backlight component (don't mention low PWM frequency issues) in a $4000 flagship workstation laptop is just treating customers like fools.

 


wrote:

I see the slight shadowing on the sides on a white screen looking straight on, but it is far better than the pinkish or blueish color gradients I have seen on the XPS 15 and other IGZO screens.  I find those gradients incredibly distracting especially when working on an Excel spreadsheet.


This is really terrible you can not get a decent laptop screen these days. Can anything beat ten years old T60p UXGA AFFS ones ?  So many cost cutting side effects that kills the product in general. And we are still talking about saving several $10 per unit only.

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ThinkPad (1992 - 2012): R51, X31, X220, Tablet 8.
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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-07-01, 19:03 PM

Thanks for replying Southwestrocks, it is/was much appreciated. It is a funny coincidence that you compared it to the latest MBP, because that was my reference too before going for the P50 in order to see what kind of performance was available in high-dpi displays, and I also remember it as having much better viewing angles and brightness I think was perceived to be higher. :)

 

Maybe the best would be to just get a full refund for the P50 and stay with my T60p and Dell D630 for now. Both have much better horizontal viewing angles, but are inferior on so many other points.

 

Yes, Puppy, we're living in interesting times indeed. And with the latest BIOS backdoors and all BIOS releases in particular just to get a useful P50 leaves me absolutely zero confidence in Lenovo.

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2032 Posts

11-28-2007

Czech Republic

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Re: When do we finally get a good screen? (P50 4K)

2016-07-10, 9:48 AM

Lenovo ThinkPad P50 Workstation (Xeon, 4K) Review

http://www.notebookcheck.net/Lenovo-ThinkPad-P50-Workstation-Xeon-4K-Review.168604.0.html

 

Our review unit is equipped with a panel from Sharp with the designation LQ156D1JW05.

 

Our initial measurements are a bit sobering though, because while we can measure a decent maximum luminance of 276 cd/m², the average brightness is just 250 cd/m² due to the mediocre brightness distribution of 86 percent. This means we are pretty far away from the manufacturer's claims. The contrast ratio of 801:1 (black value: 0.31 cd/m²) cannot meet the advertised value, either.

 

Contrary to the Full-HD panel, the 4K screen uses PWM to control its brightness. This is the case for level 8/15 and lower at a pretty low frequency of 217 Hz, so there can be problems for sensitive user

 

Similar to the FHD model, the IPS technology ensures wide viewing angles, but we can once again see a comparatively quick brightness drop when we change the viewing angle.

 

In short, Lenovo is cheating on customers by such mediocre component that even does not meet advertised specs in premium price workstation.

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ThinkPad (1992 - 2012): R51, X31, X220, Tablet 8.
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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-07-10, 11:51 AM

I actually don't think that a 86% brightness distribution is 'mediocre'. If it was mediocre, it is surprising that the MBP with it's 82% brightness distribution receive no such comments: http://www.notebookcheck.net/Apple-MacBook-Pro-Retina-15-Mid-2015-Review.144402.0.html .

But other than that I'm glad they came to the same conclusion as me that the built-in color calibrator is just for fun.

 

It now appears that my P50 has suddenly been returned from Teleplan (without any note or warning) and will receive it soon. Wonder what to expect :-)

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2032 Posts

11-28-2007

Czech Republic

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Re: When do we finally get a good screen? (P50 4K)

2016-07-10, 12:01 PM

wrote:

I actually don't think that a 86% brightness distribution is 'mediocre'. If it was mediocre, it is surprising that the MBP with it's 82% brightness distribution receive no such comments


Is the MBP calculator considered as workstation for graphic color critical work ? Both values are not good. Even Acer Aspire V15 Nitro Black Edition has better values.

 

Wonder what to expect :-)

 

Anything but a good display.

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200 Posts

06-14-2016

Sweden

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Re: When do we finally get a good screen? (P50 4K)

2016-07-11, 10:05 AM

wrote:

Lenovo ThinkPad P50 Workstation (Xeon, 4K) Review

http://www.notebookcheck.net/Lenovo-ThinkPad-P50-Workstation-Xeon-4K-Review.168604.0.html

 

Our review unit is equipped with a panel from Sharp with the designation LQ156D1JW05.

 

Our initial measurements are a bit sobering though, because while we can measure a decent maximum luminance of 276 cd/m², the average brightness is just 250 cd/m² due to the mediocre brightness distribution of 86 percent. This means we are pretty far away from the manufacturer's claims. The contrast ratio of 801:1 (black value: 0.31 cd/m²) cannot meet the advertised value, either.

 

Contrary to the Full-HD panel, the 4K screen uses PWM to control its brightness. This is the case for level 8/15 and lower at a pretty low frequency of 217 Hz, so there can be problems for sensitive user

 

Similar to the FHD model, the IPS technology ensures wide viewing angles, but we can once again see a comparatively quick brightness drop when we change the viewing angle.

 

In short, Lenovo is cheating on customers by such mediocre component that even does not meet advertised specs in premium price workstation.


 

And that definately ended my interest in the currennt P50 :(

 

Wondering what Lenovo is really thinking here. Wouldn't really use the built in screen all that much but by putting such an obvious low quality component in a machine that is sold as premium has me wondering what else is also less than stated quality.

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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-07-11, 16:50 PM

wrote:

 

Anything but a good display.


Haha... You were right. Teleplan and Lenovo apparently spent 2½ months on determining that nothing is wrong and then just update the UEFI firmware to the latest firmware. I actually was thinking that Lenovo and Teleplan had some sort of sense of quality, but this proves that there is absolutely zero percentage of this. Really unfortunate that IBM sold their PC division to a company that apparently only seeks to run the credibility of Thinkpads to zero.

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2032 Posts

11-28-2007

Czech Republic

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Re: When do we finally get a good screen? (P50 4K)

2016-07-12, 8:50 AM

wrote:

Really unfortunate that IBM sold their PC division to a company that apparently only seeks to run the credibility of Thinkpads to zero.

Number and severity of quality issues (including service) related to P series and also .60 series has completed the mission :smileyfrustrated:

 

I don't know your local policy but here if the repair takes more than 30 days you can return it and get your money back.

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281 Posts

12-08-2008

United States of America

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Re: When do we finally get a good screen? (P50 4K)

2016-07-14, 3:32 AM

it has been an interesting read; until I started reading this thread I was quite happy with my P50, having had it for two weeks. got the Xeon, M2000M, 4k display, and I had been happy. I must confess I dont even know how to read the actual manufacturer of my panel. 

 

I will keep an eye on this thread as there seem to be a lot of genuiely interested people in getting a good screen. I think I am personally biased to be happy, as 1) I just use it for casual video/photo at home (my kids videos type of thing), 2) I think I got a good price at US$1.5k for the Xeon, with the 512PCIe, 32GB non-ECC, and the aforementioned 4k and M2000M. when people on this thread make expressions as "this is now that I expect in a US$4k machine", I cannot help but draw soem comfort. Coming from XPS 15 and Asus Zenbook Pro, I appreciate the matte screen, and less aggresive color shifting to adjust to power and ambience. I do miss the color intensity of the Surface Book, but to me it's more than compensated by raw processing (CPU and GPU) power.

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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-07-20, 16:39 PM

Jdrodrig,

For around 1,500 or 2,000 I would be really happy with the setup too, most definitely. Besides, if one ever gets fed up with the display, there is money left to spend on a decent panel.

It is only when you convert what Europeans pay for a similar setup that you get to $3,000+. There are no "steals" like that at $1,500. Event with student discounts you won't get that (yet) :smileyhappy:

 

I'll settle it as this: Keep my P50 and replace the screen down the line with an OLED panel when they become available. It doesn't seem to be that expensive an option, but there are no 15.6" variants yet.

Lenovo level 2 support apparently deemed my screen fine. This just tells me to fully avoid Lenovo for private and professional purposes altogether, because they are too .... to see what quality is and what competition has to offer. I was actually very close to buying the Zuk 2 Pro. Now I wouldn't touch it with a ten foot pole.

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