Response Time Explained

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#2
hey dracul the first one is the time for the pixel to turn on, its 13ms in this case, the second is the time for the pixel to turn off, 27ms in this case, add the both together and u get the speed of the lcd,(40ms) corect me if im wrong anyone.

Trev
 
#4
Duno about that bud, its just a speed of an lcd's reaction times lol, some scenes are fast moving and some are slow moving all at the same frame rate, this measurment tells us the reaction times on the lcd, the reaction time on how fast it can react no matter the frame rate, the frame rate would come more under refresh rate, even with that said thats more of a reaction measurment too, u could run 240fps through that lcd, u wouldnt see a diff from 30fps, im talking video not games, games rely on frame rate and refresh rate, hence the faster the frame rate the smoother the image and u need a high refresh rate (refreshed image responce ) to compensate for the frame rates timings, lcd's dont use frame rates and its why they arent measured in that way, they use the responce times and refresh rate, the higher the numbers are on both, the smoother the image will look in fast moving action or gaming scenes rather then just a blur, try to go for somthing abit faster then 40ms, i personally wouldnt go any more then 30ms, 30ms and under are great for all kinds of media.

Trev
 
#5
Response Time 60 ms (Max)
Rise time 13 ms (typical)
Fall Time 27 ms (typical)

Specs for the LG 566LM

So the response time is 40ms. Now what does 60ms max mean exactly?
Also since it is and LG and most lg screens are used in our Stripable Monitor list does this mean I will most likely be able to strip it?
Also I am also looking at Phililps lcd. This is the same company correct? They make their own lcd screens so the specs should be reliable correct?
 
#6
tON 13ms from white to black, tOFF 27 ms from black to white.

40 ms response time -> max. 25 FPS.

For 50 Hz progressive scan (PAL) 20 ms is the maximum RT needed. CMV, BenQ (AUO) and NEC have that fast monitors.

What's wrong with CMV? It's the best of the available 15" monitors. There are several models with the same panel.
 
#7
What's wrong with CMV? It's the best of the available 15" monitors. There are several models with the same panel.
Click to expand...

So your saying I need 20ms minimum. Man was I wrong. I thought 30ms would do for movies. I am having dificulty getting a hold of a cmv 1512 now. What other models have the same panel? I already looked for Polyview and Liquidvideo in Argentina, Brazil and Paraguay.

Benq is available to me but I heard bad reviews such as splitting required and lousy color and image detail.
 
#10
I use Benq FP567s (AUO) panel in my pj and it's excellent. You just have to know how to use it. Yes you will need split fresnel and tilt almost everything for best CR, it's not so easy to use as CMV. It's very easy to strip. You just have to remember to connect the ground wire.
 
#11
As explained by others, "t(rise) + t(fall)" or "TRON + TOFF" or "rise and fall" times indicate the same things.

The first measure is the time in milliseconds for a single lc element to react to voltage rise from zero to full voltage (black to absolute white). The second is the reverse.

HOWEVER and this is a big however....

Those figures depend on:

- luminosity setting of the panel (as measured in candela per square meter)

- greyscale tracking and whitepoint temp settings (i.e. color calibration)

- angle of measurement (yes, you can cheat by measuring purposefully or wrong)

For almost ANY panel currently out there, all the measure TRON+TOFF= 16ms figures are purposefully measured using non-realistic luminosity and calibration that is completely off any common standards (print or video).

As such, you should proceed with caution when reading response time specifications for any LCD panel.

A second thing one must be aware of is the black-to-grey and white-to-grey response times.

These are ALWAYS (on panels currently available) worse than black-to-white and white-to-black response times.

That is, for a single LC element, it takes much longer (usually 2-3 times as long) to go from black-to-grey than from black-to-white.

Now, why is this important?

For human vision, the grey transition times are in many cases more important.

The to-grey transition times can often accurately predict whether you will have "loss of detail", "loss of depth" or "ghosting with moving objects" artifacts when viewing the image.

All in all, proceed with caution when looking at pixel response times.

Currently there is no substitute for visual inspection when it comes to display artifacts. The proof is in the pudding, at the brits say.

I won't even get started on polarisation, viewing angle, greyscale inversion and black level issues 🙂
 
#12
There is no magic "minimum" or "maximum" response time which defines "acceptable" vs "not acceptable". Theoretically, a response time of near zero is ideal for eliminating motion artifacts. This is more or less what you get with CRT based displays. If an object is in motion across the screen, and your eyes pan along with it, only a near-zero persistence CRT screen will avoid visible blurring.

In other words, a response time of 30ms has blurring; a responcse time of 20ms ALSO has blurring. Just less of it. There's no LCD screen in existence which can match up to a typical CRT display when it comes to motion blurring artifacts.

So basically, don't sweat it. Nothing beats personal observation and if it looks good to you, then great.
 
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