QDEF CFG70 quantum dot is here

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Waddo
Posts: 27
Joined: 31 May 2014, 05:23

QDEF CFG70 quantum dot is here

Post by Waddo » 20 Oct 2016, 16:39

The quantum dot Samsung QDEF CFG70 has been announced.
https://www.amazon.com/Samsung-24-Inch- ... B01M1DEEYP
C24FG70/C27FG70; 23.5", 25" and 27" delayed
$349.99 for 24"
125% sRGB
3000:1 Contrast
1ms (blur reduction only at 144hz mode I heard/no combined freesync, might be 4ms without...need reveiws)
only its 2k/1080p
144hz Freesync
1800R Curve
no panel lottery with samsung panel
and does a monitor need to be HDR certified or can monitors wit wide gamut still display HDR content accurately?
whats that 4-channel backlight going on about?
Last edited by Waddo on 05 Nov 2016, 01:32, edited 5 times in total.

Q83Ia7ta
Posts: 761
Joined: 18 Dec 2013, 09:29

Re: TN/IPS/VA all combined

Post by Q83Ia7ta » 20 Oct 2016, 18:27

yes and no.
advanced motion blur reduction is used. quantum dots also make motion blur reduction mode to be not so low brightness like other techs (lightboost, ulmb, bbr, etc).
https://youtu.be/tY5jwihAObY?t=89
no HDR afaik. only 125% sRGB.

also check this thread
http://forums.blurbusters.com/viewtopic.php?f=16&t=2987

Q83Ia7ta
Posts: 761
Joined: 18 Dec 2013, 09:29

Re: QLED CFG70 quantum dot is here

Post by Q83Ia7ta » 03 Nov 2016, 16:00

Used mine google-fu and here is some info about C24FG70
Response Time
Increase the response rate of the video or game screen.
The Faster and Fastest modes display motion blur-free sharper pictures with faster movements by
analyzing movement of liquid crystals in the panel and controlling the LED behavior.
In Faster and Fastest modes, the brightness is decreased according to the panel LED behavior. This will
prevent motion blur.
― Use Standard mode when not playing a video or game.
― When FreeSync is set to On, you cannot use both Faster and Fastest modes.
― In Faster and Fastest modes, Flicker Free is unavailable, regardless of LED control.
Only FreeSync or strobe backlight at same time.
Faster and Fastest modes give different pulse width?
Low Input Lag
Minimize input lag for fast reactions by reducing the video processing time.
― It is recommended to set the refresh rate of the graphic card to any of 100 Hz, 120 Hz, and 144 Hz. With 60 Hz,
the function is unavailable
.
― This feature is not available if the scanning rate on the computer is different from the settings in the Refresh
Rate menu.
source: http://downloadcenter.samsung.com/conte ... 7C-Eng.pdf

60Hz only with high input lag?!
MPRT rate of C24FG70: Standard 4ms / Faster 2ms / Fastest 1ms
Input lag 7~8ms
I don't like this input lag value :(

source: http://rhyshan.com/483

Motion blur reduction mode (The Faster and Fastest modes at OSD) is much brighter than ULMB at Dell S2716DG.

more info:
http://rhyshan.com
http://blog.naver.com/kayu3321

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Chief Blur Buster
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Re: QLED CFG70 quantum dot is here

Post by Chief Blur Buster » 03 Nov 2016, 16:25

Thank you for your research!

Yes, 2ms and 1ms strobe lengths for Faster and Fastest respectively.

For globally strobed LCD monitors, MPRT equals strobe length. (Not the case for all technologies, but consistently equal accurate for full-flash strobed liqud crystal display panels of any technology, where the whole display panel is flashed all at once).
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Q83Ia7ta
Posts: 761
Joined: 18 Dec 2013, 09:29

Re: QLED CFG70 quantum dot is here

Post by Q83Ia7ta » 03 Nov 2016, 19:51

Chief Blur Buster wrote:Thank you for your research!

Yes, 2ms and 1ms strobe lengths for Faster and Fastest respectively.

For globally strobed LCD monitors, MPRT equals strobe length. (Not the case for all technologies, but consistently equal accurate for full-flash strobed liqud crystal display panels of any technology, where the whole display panel is flashed all at once).
But Samsung isn't globally strobed LCD monitor. I guess you know it update in 4 steps from top to bottom.
https://www.youtube.com/watch?v=tY5jwihAObY&t=89
Do you expect any crosstalk or artifacts with 1ms mode at 144Hz? Will it be much better than BenQ MBR at 144Hz or a bit better?

StrobeMaster
Posts: 48
Joined: 25 Apr 2014, 01:31

Re: QLED CFG70 quantum dot is here

Post by StrobeMaster » 04 Nov 2016, 03:41

Q83Ia7ta wrote: But Samsung isn't globally strobed LCD monitor. I guess you know it update in 4 steps from top to bottom.
From the luminance curves I have seen, it looks rather like 3 segments, maybe it will be 4 with the 27". And the pulse pattern looks the same when frame rates drop (FreeSync), except for the additional gaps caused by delayed frames which stay dark. Obviously, this gives rise to annoying flicker, but FreeSync can be used without backlight strobing, so they say. Source: German computer journal c't.

Glide
Posts: 280
Joined: 24 Mar 2015, 20:33

Re: QLED CFG70 quantum dot is here

Post by Glide » 04 Nov 2016, 12:48

This is a QDEF display, not a QLED display.
It's a regular LCD which uses blue LED backlighting with a quantum dot enhancement film to create a pure white backlight.

QDCF displays will be arriving next year which have blue LED backlighting and individual quantum dot material to replace the color filter in the LCD. These are also not QLED displays.
They're quite exciting though, as my understanding is that the quantum dot material is emissive. So while it won't give you OLED-like contrast, it might give you much better viewing angles than a typical LCD display, and should be much brighter and more saturated than QDEF displays or regular LED-backlit LCDs.

QLED displays are displays made up of quantum-dot patterned LEDs which are due to arrive some time within the next five years and should be a competitor for OLED displays.

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