What Screen Detect is for
A new monitor, phone, laptop or TV can look fine at first glance while still showing a stuck pixel, uneven backlight, unexpected refresh mode or touch problem. Screen Detect makes repeatable test patterns available from one place, then explains what a result can—and cannot—tell you.
Start with the dead pixel test, check dark-screen behavior with the uniformity test, or estimate the active mode with the refresh rate test.
How the tools work
Test patterns, browser measurements, touch trails and local reports run on your device. The site does not capture screenshots or upload the contents of your display. Browser-based measurements have limits, so each tool distinguishes visual checks from laboratory measurements and manufacturer diagnostics.
How we write and review content
- Each page is written around a specific display question or inspection task.
- Safety limits and browser measurement limits are stated next to the relevant tool.
- Guides link to a practical test when a browser check can help confirm the symptom.
- We update pages when tools, browser behavior or common device practices change.
The knowledge base is educational and does not replace a manufacturer warranty decision, professional repair assessment or medical advice.
Who operates the site
Screen Detect is operated by Hefei Kerdoo Technology Co., Ltd. The site is maintained as a practical web utility and an ongoing display-education project. Learn how data is handled in the privacy policy, review the terms of use, or use the contact page for questions and corrections.