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26 Posts

06-03-2015

USA

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

2016-02-24, 21:19 PM

Thanks tk-don. This is helpful.

 

I am trying to understand the differences between these 2 Sharp 4K screens (JW05 & JW04). When you say that JW04 "is the sRGB variant (of the JW05?)", what do you mean by this? I read the review that you linked of the JW04 & I noticed that the color coverage was not as comprehensive as the Panny display on the P70 (as reviewed by NotebookCheck), especially for AdobeRGB

 

Would the JW05 have different color coverage than the the JW04? I am particularly interested in this because I would be doing photo editing on the P50.

 

It seems odd that they would put a display of lesser quality on the P50 - compared to the P70.

 

The 4K screen on the P70 would be good for photo editing. The JW04 screen reviewed in your  NotebookCheck  link has a weaker color coverage & would not be as suitable. My question is, where does the P50 with its JW05 display stand?

 

Thanks for any light you can shed on this.

 

Thanks.

 

Flycoop

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664 Posts

10-21-2011

Germany

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  • Message 12 of 168

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

2016-02-24, 23:17 PM

According to Lenovo, the AdobeRGB coverage should be even greater on the P50 4k (compared with the P70 4k). No tests on the 4K display until now though.

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26 Posts

06-03-2015

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  • Message 13 of 168

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

2016-02-25, 2:59 AM

Really? I didn't realize that but that's good news.

 

Where can I find Lenovo specs?

 

I had been relying on the NotebookCheck review of the P70 4K display (sRGB = 99.7%; AdobeRGB = 76%) and the NotebookCheck review of the Sharp LQ156D1JW04 display (sRGB = 96%; AdobeRGB = 61%).

 

However, the P50 has, apparently, the Sharp LQ156D1JW05, not the JW04 display that NotebookCheck reviewed.

 

I don't know how similar the Sharp JW05 and JW04 displays are or how they compare.

 

Any light that can be shed on the quality of the P50 display would be appreciated. I'm especially curious about  the color coverage. On paper, the P70 display looks pretty good & I would want something comparable in the P50.

 

 

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2 Posts

02-25-2016

Australia

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  • Message 14 of 168

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

2016-02-25, 3:06 AM

From the PSREF specification:

 

P50:

Some: 15.6" (396mm) 4K (3840x2160), anti-glare, LED backlight, IPS, 300 nits, 16:9 aspect ratio, 1000:1 contrast ratio, 100% gamut, 178° viewing angle

 

P70:

Some: 17.3" (439mm) 4K (3840x2160), anti-glare, LED backlight, IPS, 300 nits, 16:9 aspect ratio, 800:1 contrast ratio, 90% gamut, 170° viewing angle

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160 Posts

08-23-2009

United States of America

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  • Message 15 of 168

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

2016-02-25, 4:47 AM

I found the screen to be pretty bad too https://forums.lenovo.com/t5/ThinkPad-P-and-W-Series-Mobile/Lenovo-P50-4K-vs-Dell-Latitude-E6520-1080p-screens-at-full/td-p/2273141. When my 4-year-old Dell Latitude has a better screen (except for sharpness, obviously, since 1080p vs 4K), it's pretty sad.

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123 Posts

01-30-2016

Denmark

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  • Message 16 of 168

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

2016-02-25, 19:21 PM

Flycoop,

 

Indeed that is the only unknown parameter here. No-one knows the actual difference between the 04 and 05 panel, except for what is promised regarding color gamut. I.e. no datasheet available for the 05. My point is just that such a small change in numbering unlikely means that the panel technology is different, etc.

 

When I receive my P50 with 4K panel, hopefully near the end of next week, I'll make some measurements of the screen. Not with the Fisher-Price colorimeter that one is forced to buy with the P50, but with a Quato DTP94. It is unsuitable for wide gamut displays, but it is more than fine for gamma/gray level tracking and contrast measurements, which is what I'm looking for. Unfortunately, much more expensive equipment would be required for contrast loss measurements as a function of viewing angle.

I will likely be able to do a direct comparison with a colleague's W541 with 3K panel and hopefully grab some photos and post here.

 

On paper the Sharp 4K panel is the BEST PANEL Lenovo has ever offered in a laptop. It therefore feels completely crazy to hear about these complaints, which are completely valid.

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26 Posts

06-03-2015

USA

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  • Message 17 of 168

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

2016-02-27, 18:13 PM

Thanks Trevorg for the specs. On paper, the P50 display seems very strong. (I know that some P50 owners have been disappointed with the actual display.)

 

TK-don, I look forward to your review of your new P50 display.

 

If some folks have had a positive experience with P50 displays, it would be helpful to hear about those experiences.

 

Thanks all for your help.

 

Flycoop

 

 

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123 Posts

01-30-2016

Denmark

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  • Message 18 of 168

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

2016-02-27, 19:46 PM

By the way: Things may not look as good in the other "camp" either: http://forum.notebookreview.com/threads/xps-15-9550-igzo-terrible-view-angle-color-shift-red-tint.784275/

 

Here's an image of the 04 display on a Clevo notebook:

http://forum.notebookreview.com/media/xmg-u505-clevo-p751zm-3.1200/full?d=1448585539

 

Definitely some severe sort of gamma shifting going on here. So this is just how IGZO-based panels from Sharp are like, I suppose.

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4 Posts

02-28-2016

United States

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  • Message 19 of 168

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

2016-02-28, 18:05 PM

wrote:

 

 

2) Contrast and  viewing angles. I have a LG 21" screen, at least 10 years old. That has about the same contrast and quality. It is really bad. one inch movement of your body and colors change. The contrast is just horrible.


My screen is currently getting replaced (unfortunately, the screen is on back order for a month) - I'm assuming it's a screen defect as it will be the worst screen I've ever seen. 

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123 Posts

01-30-2016

Denmark

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  • Message 20 of 168

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

2016-02-28, 19:15 PM

Silvenga-ng,

Ouch! And having to wait for one month is kind of insane, considering that they have no problem building and shipping laptops within a week or two.

What was the screen like - color inversion? bad light uniformity?

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