TV Response time, what you need to know

Response time

Pixel response and input latency are the main factors that determine speed for PC monitors and smart TVs. They are not the same thing at all, even though they are both measured in milliseconds and are somewhat connected.

For individuals who wish to stay up to date with extremely dynamic and action-oriented content, response times are also quite crucial! Higher refresh rates are made possible by quicker reaction times, which are beneficial for fast-paced sports viewing or gaming.

Ghosting and visual artifacting are also less common when response times are quicker. When a previous image during a movie remains visible over the current image, this is referred to as “ghosting.”

A faster response time will enhance your experience and prevent fuzzy video or gaming.

What is response time?

What does the data actually mean, and how are response time and pixel response measured? Grey-to-grey, or GtG for short, is the most often used pixel response statistic.

It’s not a measurement of the amount of time it takes for a pixel to completely change from off to on or from black to white, despite what the name suggests. Rather, the time it takes to transition between two intermediate colors is recorded by the GtG pixel response.

The entire time required for that intermediate transition is not even recorded by the industry standard VESA method for assessing GtG response. It only records the time required for the middle 80% of the transition, eliminating the first 10% and ending 10% of the change.

That approach has significant historical justification, including the challenge of accurately determining when a screen reaches 100% of the intended color. The problem is that the beginning and especially the end of the color shift can take longer than that middle 80%, which is especially problematic for LCD technology.

An LCD panel’s pixel response can be shown on a graph as an “S” curve, with a slightly slow initial response, a fast middle phase, and a sharp decline in response near the conclusion of the transition.

Ultimately, this means that it may take a lot longer than the quoted GtG reaction to completely change from one color to another.

MPRT, or “moving picture response time,” is another pixel response metric. It is meant to provide a more accurate representation of real perceived blurring dependent on visual capabilities.

The refresh rate directly affects MPRT responsiveness. Therefore, a 1000Hz refresh rate is needed to get an MPRT pixel response of 1 ms.

At least according to stated specifications, mitigating techniques like black-frame insertion or strobing backlights can enhance MPRT response to below the panel’s refresh rate and to the point where it’s usually faster than a screen’s GtG response.

That accomplishment is not without limitations, though. Firstly, the mitigating techniques are typically ineffective when frame synching or variable refresh rates are turned on.

Additionally, screen modes meant to enhance MPRT reactions frequently lessen visual punch and vibrancy. Therefore, achieving the best MPRT response feasible with a given display while still having ideal performance in other areas is generally not attainable.

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Source: https://guidestofixit.com/smart-tvs/tv-response-time-what-you-need-to-know/