Overdrive is a term used to describe the process of increasing the pixel response time to reduce ghosting and blurring in fast-moving images. This is accomplished by increasing the voltage of the liquid crystals in the pixels, which allows them to transition faster between states. The result is a sharper image with less blurring, but there is a trade-off: higher voltages can cause the liquid crystals to degrade over time, which can lead to permanent image retention (burn-in).
Overdrive is commonly used on gaming monitors, as the faster pixel response time is beneficial for competitive gamers who need every advantage they can get. Many monitors have an Overdrive setting in the OSD (On-Screen Display) that allows the user to enable or disable the feature, and to adjust the level of overdrive (if available).
While overdrive is generally a good thing, it’s important to be aware of its potential downsides. First, as mentioned, higher voltages can cause image retention. Second, overdrive can sometimes introduce artifacts such as inverse ghosting, where dark pixels appear as light pixels and vice versa. These artifacts are usually only visible in test patterns and are not a concern for most users.
If you’re not sure whether or not to enable overdrive on your monitor, try turning it on and seeing if you notice any improvement in image quality. If you don’t, or if you notice any negative effects, you can always turn it back off.