Monitor Test

Monitor testing tool provides comprehensive screen quality evaluation through 27 professional test patterns, helping identify dead pixels, backlight bleed, color deviation, and other potential issues.

Overview

This tool covers core dimensions of monitor quality assessment, including dead pixel detection, backlight bleed testing, signal interference, contrast, color gradients, and OLED burn-in detection. All tests run entirely in the browser with no data uploaded to servers.

Test Items

Dead Pixel Test

Use six pure color backgrounds (red, green, blue, yellow, cyan, magenta) to detect bright or dark pixels on screen. During testing, carefully observe the entire screen under each color, distinguishing between dust and actual dead pixels.

Backlight Bleed and Brightness Test

Pure white background detects brightness uniformity, pure black background reveals backlight bleed. Recommended in dim environments for better results.

Interference Test

Detect analog signal interference through horizontal lines, vertical lines, cross lines, and dot patterns. Flickering, shaking, or distortion of lines indicates signal issues.

Focus Test

Display box patterns for testing CRT monitors and projector focus clarity, checking if patterns are sharp at screen center and edges.

Breathing Effect Test

Black-white switching tests CRT monitor stability. Quality monitors should maintain stable edge lines during 2 switches per second without obvious size changes.

Grid Test

White grid lines and colored cross lines detect geometric distortion. Use monitor OSD menu to adjust lines horizontally and vertically straight, also checking line width consistency, especially at screen edges.

Contrast Test

Divided into white and black contrast tests, each displaying 40 gradient blocks. Professional monitors should clearly distinguish adjacent block edges, general monitors may not distinguish subtle differences in extremely bright or dark areas.

Gradient Test

Four gradients (black-white, black-red, black-green, black-blue) test color smoothness. Quality monitors should have continuous smooth color transitions without obvious banding.

Saturation Test

Rainbow gradient tests screen color saturation and reproduction ability, colors should be vivid with natural transitions.

OLED Burn-in Test

Dark gray background detects AMOLED and OLED screen burn-in. Observe in dim environments, uneven brightness distribution or image retention indicates possible burn-in.

How to Use

1. Select test type from test items dropdown (all tests, backlight bleed test, interference test, etc.)
2. Click start test button, tool automatically enters fullscreen mode (continues in window mode if fullscreen not supported)
3. Test operations:
   • Click screen or press spacebar/right arrow to switch to next pattern
   • Press left arrow to return to previous pattern
   • Press Esc to exit test
   • Move mouse to top or bottom of screen to show control panel
4. Control panel shows current progress, provides previous, next, complete, and exit buttons
5. Automatically exits fullscreen after completing all tests

Testing Recommendations

• Test in moderately lit environment, avoid direct strong light or complete darkness
• Backlight bleed and OLED burn-in tests must be conducted in dim environments
• Maintain appropriate viewing distance, stay 5-10 seconds on each pattern for careful observation
• Recommend conducting complete test every 3-6 months to identify monitor aging issues promptly

Notes

Test results are for reference only, professional evaluation should consult monitor manufacturer or professional testing institutions. All test patterns are generated and rendered locally, no data uploaded to servers.