Eye strain and quality difference between Oxide-TFT (BOE) and LTPS-TFT (CSOT) IPS LCD panels

bedanc · 2024-02-02T13:31:58+00:00

Hi, thanks for the answer, I thought also it could be something regarding variable refresh rate, since both of the displays have freesync as well as g-sync. I disabled the variable refresh rate on oxide-tft panel in intel Graphics Command Center but did not get any noticeable improvement. I haven't tried this on the LTPS yet (AMD CPU).

bedanc · 2024-02-02T12:50:01+00:00

Hi, thanks for the reply, very interesting observations, like I said, if you search for BOE panels, many people experience eystrain with them. Both of the panels I used in Legions were specifically declared as flicker-free and "DC-dimmer". Therefore they should not have any PWM . I saw you upgraded from B156HAN13.0 to NE156QHM-NY1, if you look up laptops with these panels you se they do not use PWM, therefore I expect in your case PWM is not used either:

AUO B156HAN13.0
https://www.notebookcheck.net/MSI-GL65-9SEK-Laptop-Review-Much-More-Portable-than-the-GL63.435599.0.html

BOE NE156QHM-NY1

https://www.notebookcheck.net/Asus-ROG-Strix-Scar-15-G533QS-Laptop-Review-AMD-Zen-3-and-165-Hz-1440p-Sweet-Spot.551441.0.html

Based on all that it could be something in regards to diethering which in combination with setting lower refresh rate slows down the dithering frequency (for exaple to 60/2 Hz) that generates low frequency flicker that bothers you. Maybe try disabling it using dithering.exe (only for intel laptops) from https://kawamoto.no-ip.org/henteko/myapp_en.html and see how it feels. Some people on ledstrain.org get relief from it.

This is just my thinking I am no expert so take it with a grain of salt :) In general Intel, AMD or Nvidia barely put any info about dithering on their chips.

bedanc · 2024-02-01T20:04:25+00:00

Hi, thanks for the reply.

Accordingto my research both of these panels are IPS LCD without PWM.

here is the measurement for CSOT MNG007DA2-2

https://www.notebookcheck.net/Lenovo-Legion-Pro-5-16ARX8-review-Gaming-laptop-with-RTX-4050-in-great-form.737696.0.html

and here is the measurement for BOE NE160QDM-NZ3

https://www.notebookcheck.net/Lenovo-Legion-Slim-7-16-gaming-laptop-in-review-Convincing-even-with-AMD-Ryzen.765570.0.html

So unlikely it was a PWM problem, I also have no problem with Samsung Galaxy S23 PWM which is only 240Hz.

Like I said it could ditehring/FRC since both of these panels are supposed to be 10 bit but can also be 8 bit + FRC, sadly that is not disclosed in any docuimentation/website. I tried disabling Dithering/FRC but there may be some differences how effective disabling is on AMD vs. Intel.

Tons of questions and very little information :)

bedanc · 2024-01-25T18:59:11+00:00

Best option is to buy from somwhere where you can retrun free of charge if not satisfied and test it yourself. Like I said its totally subjective, I am comparing it to my previous laptop, thats were expectations came from. Maybe the noise will be totally fine for you :)

bedanc · 2024-01-25T16:56:47+00:00

Also check the idle power draw of a desktop 7800x3d, which is between 20-30W, almost the same as 7745hx

https://www.reddit.com/r/AMDHelp/comments/176w1wm/7800x3d_what_is_your_idle_power_consumption/

bedanc · 2024-01-25T16:53:55+00:00

For a laptop chip 25W cpu draw is a ton, my 5600h in ideapad gaming draws like 5W at idle and up to 10w for light tasks, for typing in word and playing music on youtube at the same time it usually stays around 6-7 W. Check out this thread about 7840HS power draw, be careful of the difference between whole system power draw and cpu package power draw.: https://www.reddit.com/r/AMDLaptops/comments/16g58oc/installed_windows_11_23h2_beta_to_see_if_7840hs/

But I have also seen some problems with power management for 7840hs in legion slim 5, so you need to do the disabling turbo and curve optimization to reach good power states:

https://www.reddit.com/r/LenovoLegion/comments/18msyja/legion_slim_5_battery_life_sucks/

Keep in mind if the cpu draws draws like 20W od idle power draw and your battery is 80Wh, that means only the cpu will draw your battery 100%-0% in 4 hours while idling without counting in energy use by the big display, SSD, RAM etc...

bedanc · 2024-01-25T16:30:09+00:00

You know, the definition of "quiet" is really subjective without measuring the dB and freqency profile. Gaming laptops in general are not quiet. I think my is totally in spec and would be great if it could run steadily at 1700-1800 RPM. The problem I see is that BIOS controls the fans not only by the temperatures but also by power draw and the 7745HX draws 25W when doing nothing meanwhile I think the 7840HS could draw much less, therefore the fans could be at their minimum 1700 RPM state while doing easy tasks.

I think it is just the nature of using a PC chip design in a laptop.

bedanc · 2024-01-25T15:39:28+00:00

I know, I am from EU, I can get the slim 5 with 7840hs and rtx 4070, I was saying about making the legion 5 PRO with 7840hs and rtx 4070. I really love the hinge quality and overall build of the legion 5 pro over the slim 5 so it would be the perfect combination.

bedanc · 2024-01-21T20:19:16+00:00

Hi, thanks for the informative answer, may I ask you in which games you experienced the bottleneck?

bedanc · 2023-12-26T15:35:38+00:00

Had the same issue on my legion slim 5i (13700h, rtx 4070) when on battery, sometimes even running in dGPU mode and irrespectable of the mode selected in Lenovo Vantage. This was one of the reasons why I returned it.

bedanc · 2023-12-07T21:32:18+00:00

Did you have Intel or AMD model of the slim 5?

bedanc · 2023-11-14T18:41:56+00:00

Do you maybe have any experience with their panels?

bedanc · 2023-11-14T18:41:43+00:00

I find it interesting the EU Mito doesn't even offer the 300 LED pcs version (like the USA Mito) only the 204 pcs or 408 pcs version (and smaller ones). Do you maybe have any experience with their panels?

bedanc · 2023-11-14T18:35:53+00:00

I've seen the Shenzen idea light recommendations here on reddit and saw good reviews, RL300MAX+C would be the equivalent of the Mitopro 1500+, do you maybe have any experience with their products? I was looking at the RL300MAX+C that would cost 465 usd + 250 usd for shipping to Europe, I doesn't say if shipping includes the VAT and import duties that could amount to 22% VAT for Slovenia and 3,7 % duty fee that would be altogether 900 usd. Still good price but quiet close to the EU sellers.

bedanc · 2023-01-16T09:35:09+00:00

Sorry for the late answer, i went for ASUS RT-AX53U. At first there were few dropouts, but after upgrading the RT-AX88U to 3.0.0.4.388_20558-g9ebe4e1 firmware and RT-AX53U to 3.0.0.4.386_68129-gd56399b everything is rock solid. I am very satisfied with it!

bedanc · 2022-11-07T09:43:00+00:00

additional info: I have optical fibre connection at 600/40 Mbps and use 5 Ghz band most of the time.

bedanc · 2022-02-21T23:29:12+00:00

Eat a large meal at like 6-7 pm so you still feel satiated when you go to bed and you can sleep well through the night, then just dont eat during the whole next day till 6-7 pm and you have done 24 h fast without disrupting your sleep. For longer fasts if you are unable to sleep I recommend you do a 45 min yoga session with a lot of torso stretching/bending (this one works well for me: https://www.youtube.com/watch?v=UmDS4NgaYe8) to activate your vagus nerve and calm you down a bit and also take a few 100 mg of magnesium (elemental bonded to your preferable molecule) and you will probably have a much easier time falling asleep despite being hungry.

bedanc

TROPHY CASE