
The amount of time it takes a TV to make this change in luminosity is the response time, measured in milliseconds. Every shade corresponds to a different level of luminance output, and so when a TV switches from one shade to another, the screen’s luminosity must also change.

We use a specialized tool connected to a computer through USB to record how quickly a TV can make transitions between different shades of gray, which is measuring the response time. One is the 100% response time, and the second is the 80% response time. There are two measurements we take to test for response time. It has a big impact on the appearance of motion blur, but it's not the only factor.

Response time is the time it takes for a pixel to change from one color to the next.
