Per-display blackouts and dimming to protect OLED monitor panels
Put idle OLED monitors into full-black or dim states on a per-display basis, using independent timers and wake detection. OLED Sleeper, by Diego Demétrio, runs as a native Windows utility and sits in the system tray. It offers three idle detection modes, hardware brightness control via DDC/CI, and instant wake on input. The app targets PC users and enthusiasts who run static content on a secondary OLED screen and want a precise way to reduce pixel wear.
How does it detect when a screen is idle?
The tool offers three idle detection modes: mouse movement, focused-application monitoring, and system-wide input. Each monitor can use its own idle timer, so you can assign different inactivity thresholds per display. The focused-application mode tracks which window holds input focus, which helps avoid false triggers when a fullscreen game or video is active on one screen while another is left static.
Does it affect desktop performance or run in the background?
The app is a lightweight native WPF utility that lives in the system tray and reports minimal resource usage. It performs idle checks and, when configured, sends DDC/CI commands or overlays a black image; these operations run without continuous high CPU load. Instant wake returns control on keyboard or mouse activity, so the tool's background work is limited to polling and the occasional hardware command.
Is it safe for OLED panels and how does it interact with hardware?
OLED Sleeper uses two action modes: a blackout overlay that displays a pure black image and a dimming mode that sends brightness adjustments over DDC/CI. Blackout uses the panel's native pixel-off behavior on OLED screens, while dimming requires the monitor to support DDC/CI. The tool avoids full power cycling, which preserves immediate wake behavior and reduces the wear associated with repeated hardware power events.
Who should configure advanced settings, and is setup technical?
The tray interface is minimal, but configuring per-monitor timers and choosing detection modes requires basic familiarity with multiple-display setups. Users must confirm their monitor's DDC/CI support if they plan to use dimming. The open-source design makes configuration transparent for technically minded users, while casual users can rely on default timers and the blackout option for a simple setup.
Practical recommendation and final assessment
For owners of OLED screens who keep static content on a secondary display, the app provides a focused way to reduce pixel wear and preserve wake responsiveness. Test the chosen mode and wake behavior on each monitor before relying on it for long sessions, since effectiveness depends on how a particular panel treats a black image and on DDC/CI availability. Use conservative idle timers during initial setup to confirm expected behavior.
