Variable refresh rate
A display supporting a variable refresh rate usually supports a specific range of refresh rates (e.g. 30 Hertz through 144 Hertz). This is called the variable refresh rate range (VRR range). The refresh rate can continuously vary seamlessly anywhere within this range.
A major purpose of variable refresh rates is the elimination of stutters and tearing by keeping refresh rates in sync with a varying frame rate from a video game. This makes display motion more smooth despite a varying frame rate.
More recently, since the 2010s decade, raster displays gained several industry standards for variable refresh rates. Historically, there was only a limited selection of fixed refresh rates for common display modes.
Variable refresh rate display technologies include several industry standards and proprietary standards:
- AMD FreeSync
- Nvidia G-Sync
- VESA Adaptive-Sync press release
- HDMI 2.1 Variable Refresh Rate (VRR)
- Apple ProMotion
- Qualcomm Q-Sync
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