Output
Steady colors, steps or fine-line patterns
UserBenchmark / All Tools / CRT Test Patterns
Display
CRT Test Patterns
Display a crosshatch grid and geometric alignment patterns.
Free to useNo downloadNo sign-up
CRT Test Patterns · At a glance
Quick answer: Display a crosshatch grid and geometric alignment patterns. The patterns reveal visible alignment concerns.
CRT Test Patterns
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Display the crosshatch and grayscale fields.
- Inspect straightness, geometry and edge alignment from your normal position.
Input
Manual visual inspection
Browser requirement
Native resolution; fullscreen support
Processing
Runs on your device; no tool-result upload
How it works and what the result means
These are visual inspection patterns. The page cannot read individual panel pixels, measure nits or contrast ratio, diagnose a panel automatically, or repair dead pixels.
Reading the result
The patterns reveal visible alignment concerns. Browser scaling and output timing are also part of the displayed image.
Worked example and assumptions
Crosshatch and grayscale patterns
Inspect geometry, convergence and edge alignment. The browser can display a pattern but cannot change CRT service-menu adjustments or confirm safe calibration.
Inspect geometry, convergence and edge alignment. The browser can display a pattern but cannot change CRT service-menu adjustments or confirm safe calibration.
What to check next
Use a resolution and refresh mode supported by the display. Consult device-specific documentation before changing calibration controls.
Use native screen resolution and 100% browser zoom for fine patterns. Disable adaptive brightness for comparisons. PWM inspection needs an external camera; banding can also be a camera artifact.
Frequently asked questions
Does the page adjust CRT convergence?
No. It displays patterns only. It cannot modify service settings or determine a safe adjustment procedure for a particular unit.
How do I start the CRT Test Patterns?
Choose a pattern and open fullscreen. Inspect the entire panel, then click to cycle patterns. Press Escape to leave fullscreen.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.