![]() The DXGK_BRIGHTNESS_INTERFACE_3 interface is ignored on down-level Windows versions. If a display driver exposes the DXGK_BRIGHTNESS_INTERFACE_3 interface, Windows 10, version 1809 and later controls brightness using nits values. If a display driver only exposes the DXGK_BRIGHTNESS_INTERFACE_2 interface, the system will control brightness using percentage values. Windows detects the type of brightness interface exposed by the display driver and selects the most appropriate one. And therefore, enables very smooth and accurate brightness transitions. Nits-based (recommended): Controlling brightness using nits values allows for a fined-grained control of backlight levels.Percentage-based: Controlling brightness using percentage values, supporting 101 levels (zero through 100) of backlight control. ![]() The number of brightness levels that a display device exposes is important. Optimizing display brightness steps and transitions Adaptive brightness registry configuration parameters.Users can control brightness using the action center slider.Automatic brightness is enabled by default.The following improvements in Windows 10 version 1903 (19H1) are still in place: There is a user toggle for Content Adaptive Brightness Control (CABC). Updates to the Display settings page are noted in this article. The default curve is more stable and reliable, plus easier to integrate. The new method does not rely on the previous OEM-configurable lux-to-brightness curve. For more information, see Ambient light response curve changes for Windows 11. The implementation for auto-brightness has been radically simplified for OEMs wishing to integrate light sensors into Windows 11 using a new paradigm, a bucketized ambient light response (ALR) curve. ![]() Adaptive brightness provides users a more responsive display experience where brightness adapts automatically to the user's environment. ![]() Adaptive brightness is the screen brightness set automatically by the system in response to the ambient light sensor reading. ![]()
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