When To Run This Test
Run it if your screen feels fine sometimes and rough at other times.
That pattern usually means brightness-dependent behavior. This test checks exactly that.
What You Need
- Your laptop or monitor.
- Your phone with slow-motion recording.
- A plain white screen on the display.
GOAL OF THE TEST ═══════════════════════════════════════════════════ Not to judge comfort by feeling. Not to diagnose symptoms. Only to check if output stays stable as hardware brightness goes down.
The 60-Second Script
- Set brightness to 100%, record 3 seconds.
- Set brightness to 50%, record 3 seconds.
- Set brightness to 25%, record 3 seconds.
- Play all clips side-by-side and compare patterns.
WHAT TO LOOK FOR
═══════════════════════════════════════════════════
Stable clip: no moving bands
Warning clip: rolling lines
High-risk clip: strong pulsing/strobing
If change appears at low brightness,
your panel behavior is level-dependent.
Read Your Result
| Result | Meaning | Action |
|---|---|---|
| Stable at all levels | Behavior is consistent | Use normal controls |
| Stable high, unstable low | Low-level zone is risky | Avoid low hardware brightness |
| Unstable at multiple levels | Panel is broadly noisy | Use high hardware brightness plus software dimming |
Set Up Around Stability
PRACTICAL CONFIGURATION ═══════════════════════════════════════════════════ 1) Keep hardware brightness high 2) Dim perceived output in software 3) Re-test after setup changes Repeat until output is stable in your daily range.
Product Disclaimer
Tap Zap is a software tool for controlling display output. It is not a medical device and makes no health claims. Consult a healthcare professional for sleep or vision concerns.
Test First. Then Tune.
A one-minute baseline prevents weeks of guessing.
SET HARDWARE BRIGHTNESS TO 100% FOR ZERO PWM FLICKER
Get Tap Zap →