Luminous Landscape Forum
Equipment & Techniques => Computers & Peripherals => Topic started by: Frans Waterlander on September 13, 2013, 09:14:26 pm
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If you have one of these, how do you like it for color-critical image editing? The tftcentral review was very positive with special mention of significantly reduced backlighting bleed into dark areas and improved, less course, antiglare coating as compared to the previous ccfl version.
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If you have one of these, how do you like it for color-critical image editing? The tftcentral review was very positive with special mention of significantly reduced backlighting bleed into dark areas and improved, less course, antiglare coating as compared to the previous ccfl version.
I love new satin coating in NEC P/PAxx2 series, with no exeption of P232W. I also like better uniformity, lower minimum backlight brightness, and slightly larger gamut. Backlight bleeding is something that occurs randomly, so it's hard to say if it's better without checking many units, but the few I saw were ok in this respect.
The only drawback of P232W is relatively low ~180Hz PWM frequency, so some flickering may be visible at low brightness level, which may lead to eye fatigue. In comparison - P242W has ~8kHz, and PA242W ~10-20kHz PWM.
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Cz, thanks for the reply. Where can I find the PWM frequency info for the P242W and PA242W or other NEC monitors for that matter.
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Cz, Are you sure about the 8kHz and 10-20kHz? I'm wondering, if those frequencies can be done for those monitors, why NEC wouldn't use those higher frequencies for the P232W? It would make a lot of sense to reduce/eliminate flicker at lower brightness settings, so why not in the P232W? Maybe pulse-width-modulation is very hard to do at those higher frequencies and maybe the information is not correct? I've spent a lot of time trying to find more info on the internet, but it seems that 200-400Hz is mentioned most often and I haven't found any info source that clearly states what frequencies are used for NEC monitors with the exception of the 180Hz for the P232W on the tftcentral website.
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Cz, Never mind. I found the PWM frequency data on the NEC website of all places, but they make it hard to find. You have to search for the particular monitor and try several of the hits you get, because some hits lead you to specs that include it and others don't. When you download the spec sheets (what I did first), the information is not there. What a mess. So for the P232W it is 180Hz, for the P242W it is 8.736kHz and for the PA242W it is 20kHz. I'll be chatting with NEC next week to find out why it is only 180Hz for the P232W.
Thanks for bringing this issue to my attention in the first place. I have no idea if I am susceptible to the 180Hz, but it is good to be aware.
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Today, NEC confirmed that they are aware of the potential problems of flicker, eye strain, headaches, etc. caused by the low pulse width modulation frequency (just 180Hz) of the W-LED backlighting of their 23" P232W LCD monitor. They also said there are no plans to increase this frequency, which in my opinion would be very easy to do; similar W-LED backlighting of the 24" P242W runs at over 8,000Hz and is as such problem-free. They advice to buy the P242W, which is US$200 more expensive, if you have issues with flicker, eye strain, headaches, etc. If you consider the P232W, better evaluate before you buy or buy with a solid money-back warranty, which is what I am going to do.