Flicker observation test
Show gray patterns for camera-assisted PWM flicker observation.
LIVE TEST WORKSPACEVISUAL PATTERN · OBSERVATION
What does PWM / rolling shutter mean here?
Aim a phone camera at the static gray field and vary the monitor brightness in its own menu. Camera bands alone cannot confirm PWM.
Enter fullscreen test
SCREEN · CSS PIXELS—
DEVICE PIXEL RATIO—
What do you see?
What does PWM / rolling shutter mean here?
Aim a phone camera at the static gray field and vary the monitor brightness in its own menu. Camera bands alone cannot confirm PWM.
How to use this test
- Aim a phone camera at the static gray field and vary the monitor brightness in its own menu. Camera bands alone cannot confirm PWM.
- Record what you actually see or calculate; repeat under the same settings.
What does PWM / rolling shutter mean here?
Aim a phone camera at the static gray field and vary the monitor brightness in its own menu. Camera bands alone cannot confirm PWM.
Where is my test data stored?
The test runs on your device. Results are only saved to this browser when you choose Save. Clear them from the report page at any time. Audio and video are never uploaded.