Скачать или смотреть Screen Flicker Test ⚡ (1 Hour) | PWM Dimming, VRR & Pixel Inversion | 4K

Do you get eye strain, headaches, or see strange flickering on your screen? Your monitor or TV may be suffering from PWM Dimming, VRR brightness flicker, or Pixel Inversion. Use this professional 4K Flicker Test Pattern to reveal hidden instability.

⚡ WHAT IS PWM FLICKERING?
PWM (Pulse Width Modulation) controls brightness by rapidly turning the backlight ON and OFF. If the frequency is too low, it causes invisible flicker that leads to eye fatigue and headaches.

🎮 WHAT IS VRR FLICKER?
With G-Sync or FreeSync, some panels change brightness while the frame rate varies, creating visible flicker in dark scenes.

🧩 WHAT IS PIXEL INVERSION (PIXEL WALK)?
Voltage imbalance in LCD pixels makes static patterns vibrate, shimmer, or show mesh-like artifacts.

🧪 HOW TO USE THIS TEST:
1. Play this video in 4K.
2. WATCH THE BOXES:
👉 PASS: Boxes look solid gray and stable.
👉 FAIL: Boxes flicker, shimmer, or change color (green/purple).
3. FOLLOW THE WHITE BAR:
👉 PASS: Smooth motion with slight blur.
👉 FAIL (PWM): You see multiple bars or a strobe-like trail.

⚙️ SCREENFIX LAB TECH SPECS:
• Patterns: Checkerboard Pixel Walk + Horizontal/Vertical Voltage Stress
• Feature: Seamless Loop & Active Motion (VRR friendly)
• Resolution: 4K UHD (3840×2160)
• Duration: 1 Hour

Perfect for gaming monitors, laptops, TVs, and PWM-sensitive eyes.

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