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Test de Motif en Damier

Testez la netteté des pixels avec un motif de damier en plein écran. Détectez les pixels flous. Outil gratuit.

Test de Damier
Testez la netteté des pixels avec un motif de damier en plein écran. Détectez les pixels flous. Outil gratuit.
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Tests sub-pixel rendering at 2px grid
Reveals dead or stuck pixels instantly
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Qu'est-ce qu'un Test de Damier ?

Des pixels alternés noir et blanc testent la netteté, la luminance et la réponse des pixels.

Ce qu'il Révèle

Why Should You Run This Test?

A checkerboard pattern is the most demanding test for pixel-level sharpness. Every single pixel must be distinctly black or white — if your display is running at a non-native resolution, using poor scaling, or has a faulty display cable, the checkerboard will immediately look blurry, moiré-patterned, or gray instead of crisp.

Common Symptoms This Test Catches

  • Text looks fuzzy or slightly out of focus
  • Fine details in images appear soft or smeared
  • Screen looks sharp in the center but blurry at edges
  • Certain areas of the screen have a colored tint that shouldn't be there

What Causes a Blurry or Distorted Checkerboard?

Resolution & Scaling Issues

  • Non-native resolution — If your OS is set to a resolution that doesn't match your monitor's native resolution, pixels are interpolated and the checkerboard will look soft or gray.
  • Display scaling above 100% — Windows/macOS scaling (125%, 150%) can blur pixel-level patterns. This is expected behavior but indicates your apps may not be pixel-perfect.

Cable & Connection Issues

  • VGA/analog cable — Analog signals introduce noise and blur. Use digital connections (DisplayPort, HDMI, USB-C).
  • Damaged or low-quality cable — A faulty cable can cause sparkle, blur, or intermittent pixel issues.

Hardware Defects

  • Dead or stuck pixels — Individual pixels that don't respond will stand out dramatically against the alternating pattern.
  • Sub-pixel rendering issues — If sub-pixels are misaligned, you'll see colored fringes on the black/white edges.

How to Read Your Results

✅ Crisp, distinct black and white pixels — Your display is running at its native resolution with a good digital connection. Pixel-level rendering is working correctly.

⚠️ Pattern appears slightly gray or has moiré effects — Your display is likely running at a non-native resolution or is using display scaling. Check your OS display settings and ensure the resolution matches your monitor's native spec.

❌ Blurry, soft, or has colored artifacts — There may be a cable issue (try a different cable), your resolution is wrong, or there is a hardware defect. Check: 1) Display resolution, 2) Cable type/quality, 3) GPU output settings.

How to Fix Checkerboard Issues

  • Set native resolution — Right-click desktop → Display Settings → Resolution. Choose the resolution marked "Recommended" — this is your panel's native resolution.
  • Switch to digital cable — Replace VGA with DisplayPort, HDMI, or USB-C. Digital connections are pixel-perfect.
  • Set scaling to 100% — For pixel-perfect testing, temporarily set display scaling to 100% (Settings → Display → Scale).
  • Check for overscan — Some TVs/monitors crop or scale the image. Disable overscan in your TV settings or GPU driver.
  • Try a different cable — If the pattern has sparkle or intermittent artifacts, the cable may be faulty.
  • Update GPU drivers — Outdated drivers can cause rendering issues at the pixel level.

reference_results

✅ Good Result — Crisp Checkerboard

When viewed close-up, you should see perfectly alternating black and white squares at the pixel level. From normal viewing distance, the pattern should appear as a uniform medium gray — this means every pixel is rendering correctly and your resolution is native.

⚠️ Mediocre Result — Moiré Pattern

Instead of uniform gray, you see wavy, shimmering patterns or uneven brightness areas. This is called moiré and typically indicates your display is running at a non-native resolution, causing pixel interpolation.

❌ Bad Result — Blurry or Tinted

The pattern looks soft, smeared, or has colored fringes (pink, green, or blue edges). This indicates a cable issue (analog VGA signal), incorrect resolution, or sub-pixel rendering problems.

Questions Fréquentes – Test de Damier

Vos yeux mélangent les pixels alternés en un gris moyen.

Oui. Les pixels morts sont très visibles.

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Quick Screen Health Check

How did your screen perform?

How did the checkerboard pattern appear?