The official Philips BDM4065UC thread

Hopefully badass made a typo and it's 2400Hz.. Doubt it though :D

I have come to the conclusion that monitor manufacturers are mostly numpties. The perfect monitor doesn't exist, and for every good thing they may do on one monitor, they will do something to detract from it :)

It's like they simply REFUSE to get it "just right" :D
 
Last edited:
It's 240Hz frequency, and a full on/off amplitude. the duty cycle (on time) just gets progressively shorter as you lower the brightness setting.

240Hz is low for any PWM screen, so it could lead to problems for some. personally i've never found it a problem, so one shouldn't just dismiss it immediately just because it uses PWM. Even expensive high end models like the Dell UP321Q use PWM incidentally.

I will report back about the luminance at different brightness settings. i'm using the screen currently at 100% brightness as i'm testing response times, and it's not overly bright or uncomfortable to be honest. A software programme to limit brightness could help, as could changing brightness via graphics card instead of from the screen, but you will crush contrast ratio by reducing luminance from a software point of view.
 
studulike said:
i don't think you will have problem if you never had problem before as most old LCDs after CRT would used PWM ? i heard about it but never happen to me. ( i wouldn't know my old monitors were PWM if i did not read it online )
Click to expand...


As Baddass states though, it's new monitors that are more prone to the problem than older monitors, I can't seem to find info on my Dells 2405, 2407 and 2709 to see if it was an issue for them to compare with this new one.
 
Thank you Baddass , i'll wait for full review too ,i will get this monitor delivery tomorrow then i will use your review guide me what best setting i should use.
 
Baddass said:
I will report back about the luminance at different brightness settings. I'm using the screen currently at 100% brightness as i'm testing response times, and it's not overly bright or uncomfortable to be honest. A software programme to limit brightness could help, as could changing brightness via graphics card instead of from the screen, but you will crush contrast ratio by reducing luminance from a software point of view.
Click to expand...

That's an idea but I'm not sure how that would be implemented for those of us who colour calibrate, as the software makes the screen go black, not sure if the other software could be overlayed to adjust the colours in software...worth a try though!
 
TheBigCheese said:
As Baddass states though, it's new monitors that are more prone to the problem than older monitors, I can't seem to find info on my Dells 2405, 2407 and 2709 to see if it was an issue for them to compare with this new one.
Click to expand...

all the old models almost certainly use PWM. I don't know for sure, but i would be 99% confident old models like that do. Those are all CCFL backlit screens though and PWM is less noticeable on that technology due to the way the backlight brightness has a more subtle curve when it's turned on. On LED backlights it's a more instant off/on switch and so PWM becomes more noticeable.
 
Anyone else suffering from displayport syncing problems? I frequently get "no input detected" when booting my PC now, which is bloody annoying!
 
Baddass said:
all the old models almost certainly use PWM. I don't know for sure, but i would be 99% confident old models like that do. Those are all CCFL backlit screens though and PWM is less noticeable on that technology due to the way the backlight brightness has a more subtle curve when it's turned on. On LED backlights it's a more instant off/on switch and so PWM becomes more noticeable.
Click to expand...

Thanks for the clarification. :) It's difficult to compare, I tend to think that newer tech will fix the problems of older tech, but maybe that's not the case.


hernaldo said:
Can't imagine anyone would want less than 100% brightness on this monitor anyway to be completely honest.
Click to expand...

How come? Is it pretty dim generally?

Smurfin said:
Anyone else suffering from displayport syncing problems? I frequently get "no input detected" when booting my PC now, which is bloody annoying!
Click to expand...

Uh oh...here we go...displayport is the only viable connection as well isn't it? That's the only one that can display 4K at 60Hz isn't it?

Is it monitor firmware upgradable?
 
Smurfin said:
Anyone else suffering from displayport syncing problems? I frequently get "no input detected" when booting my PC now, which is bloody annoying!
Click to expand...

ARGH!

Starting to think I should stay away from this thread.... Last thing I want to hear about is another monitor with displayport problems! :eek:
 
Waking up from sleep results in the screen appearing for a second, going black and then locking on a final time (so no real issues other than a few seconds wait).

It's mainly booting that gives me a problem.
 
Smurfin said:
Waking up from sleep results in the screen appearing for a second, going black and then locking on a final time (so no real issues other than a few seconds wait).

It's mainly booting that gives me a problem.
Click to expand...

So how do you get it to work again?


Also, just a thought, is it a standard displayport cable it takes? It doesn't need anything fancy does it (thinking of HDMI v1.3), I have a displayport into my monitor now...I've had it a while so it must just be a standard one.
*edit* Just had a chance to check all the displayport cables from OCUK, looks like they are all the same standard, that'll do. :)
 
Last edited:
TheBigCheese said:
Thanks for the clarification. :) It's difficult to compare, I tend to think that newer tech will fix the problems of older tech, but maybe that's not the case.




How come? Is it pretty dim generally?



Uh oh...here we go...displayport is the only viable connection as well isn't it? That's the only one that can display 4K at 60Hz isn't it?

Is it monitor firmware upgradable?
Click to expand...

100% brightness is right on the upper limit line of how bright I would want the monitor to be, it's the exact sweet spot.
Having said that, I'm talking from aesthetics point of view, for example if I worked in an office all day typing things in spreadsheets or other office stuff 9-5 for work then I'd turn it down to avoid eye strain long term.

(Actually talking rubbish here, I'd just leave it at 100%, but I'm trying to empathize ;))

It's not that bright. We're not talking "dynamic" setting on your TV bright for example, but as stated it's only *just* ok - putting myself in conservative person's shoes again.
 
PSA: Nvidia drivers are having issues with 4k monitors at the moment, causing screens to go black, Windows crashes and the lowering of hertz from 60 the 30. Check the geforce forums if you're having issues.
 
TheBigCheese said:
So how do you get it to work again?


Also, just a thought, is it a standard displayport cable it takes? It doesn't need anything fancy does it (thinking of HDMI v1.3), I have a displayport into my monitor now...I've had it a while so it must just be a standard one.
*edit* Just had a chance to check all the displayport cables from OCUK, looks like they are all the same standard, that'll do. :)
Click to expand...

This displayport issue smurfin talks about is strange as the other 4K displays that have issues is down to the fact they are using MST for the communication over displayport interface...

Haven't noticed a problem here on mine booting but only turned on a few times from cold, been in standby loads though and not a problem there.
 
Smurfin said:
Trouble is, there's no such thing as a perfect monitor :(

I'd take this over backlight bleed problems!
Click to expand...

Yeah, am less concerned about displayport issues than I was with say the 32 inch VA panels and their flickering - I am more confident displayport issues are something that can be fixed and will hopefully be limited to certain sets, whereas the 32 inch flicker issue is more a panel problem and am not convinced it will get addressed as easily.

Edit: unless it's what is likely some kind of stupid firmware fix, which I suspect was the problem on the 34um95 with sleep.
 
You must log in or register to reply here.
Back
Top Bottom