Originally Posted by Extreme_Boky
It does not….
What you tried (but failed) to explain is interpolation. Interpolation being turned ON or OFF will not affect how many frames are sent to the LCD panel within a period of time. If the interpolation is OFF -> frames will be repeated. If the interpolation is ON -> the frame interpolation algorithm and surrounding hardware (fast memory) will receive a frame and store the same, it will then receive the second frame, and then calculate in-between-interpolated frame (hence the unavoidable lag between sound processing, and picture processing -> there’s another reason for the lag, but more on that if there’s an interest from other members…).
240Hz TV's charge and discharge LCD panel pixels from white(ON) ->black(OFF) ->white(ON) much faster than 120Hz TV sets -> hence the need for very fast LCD panel response time -> which means better quality panels in general.
240Hz TV sets will always display constant number of full pictures (frames) IRELEVANT of interpolation being switched ON or OFF. LCD panels are "progressive" in nature, they can not display interlaced material - there's no picture tube electron beam to do the scanning line-by-line, so the T-CON processor and adjacent memory chips work very hard to generate full frames that are sent to LCD panel. This puts additional stress on T-CON PCB layout and power supply -> both have to be of very low noise nature to allow for fast rise / fall times, so this is ANOTHER benefit of 240Hz sets -> good engineering and high quality (fast) IC’s / memory.
Once again, interpolation and refresh rates are not related in any way, hopefully you understand that now...
My theory of interpolation is solid, this link clearly states that the processors on LCD sets recreate images from real ones and double or tripple frame rate.
You have some good understanding about LCD hardware technology but i don't think anything i said was incorrect.
Originally Posted by Extreme_Boky
If the interpolation is OFF -> frames will be repeated. If the interpolation is ON -> the frame interpolation algorithm and surrounding hardware (fast memory) will receive a frame and store the same, it will then receive the second frame, and then calculate in-between-interpolated frame
You clearly state that with interpolation off (120/240hz) that the frames are repeated and yes this is true because of the pulldown effect from having to fit a uneven 24 frames into 60 and with it on it will take a single frame store it then take the second frame and compare it to the first frame to correctly calculate and create a prediction frame and place it in between those two frames and then process it to display on the screen. Because of this process this creates input lag or a delay in the response for it to be displayed on the screen.
No your right interpolation doesn't affect the refresh rate at all and i don't think i said that it ever did, say a set has 240hz they are not implying a actual 240 hz they just use this term to draw attention to customers and categorise its technology with a name. But the frames within a set are modified or polated, a 60hz rated with 240hz will only be able to reproduce 60hz maximum.
Computers are able to use interpolation without any extra hardware to be installed, its this that proves that screens are not needed to be more than 60hz to have this judder free technology.http://www.tested.com/news/how-to-en...vie-files/329/
It may well be that the technology has just improved on newer sets which have 240hz but there may very well be 120hz sets that can have better response time than 240hz ( iv seen and tested this ).
Remember the lag created from 120/240hz technology is not referred to as response time, response time is a term used for measuring the response for a pixel to change from one state to another. The lag from the interpolation is called input lag and input lag increases from 120 to 240hz and is unavoidable.
If these screens were true 120hz/240hz refresh rates this would give a noticeable improvement in response time just like with plasma's 600hz as they excite each subpixel 10 times per frame to make sure the transition between the pixel state of change is small thus low response time. But i don't believe LCD's do, LCD's use their interpolation to make up for the bad response time that LCD's give off. LCD manufacturers have been trying to push the response times of these displays, they are still nowhere close to producing something that plasma technology can and its this that they introduced Interpolation to try and recover some clarity from the already bad ghosting and image blurring. The slow response time is still there and is unavoidable when trying to play games, as the repeated frames cause the screen to hold the frames longer, you shouldn't run games with 120/240hz as it is already running at a high frame rate and would only make the image and gameplay worse.
Your theory that LCD response time would be better when the refresh rate is increased from 120hz to 240hz but like i said i do not believe that its actually pushing past 60, if you can prove that this technology is making the actual refresh rate increase then i would be interested to see this as it would explain a better response time.