Checking the screen and sensor
Inspect pixels and gradients, measure browser frames, and test touchscreen touches.
Dead pixel test
Display solid colors in full screen and inspect your screen. Compare suspicious dots against several backgrounds.
Backlight bleed and screen uniformity test
Inspect dark and gray fields. Compare the corners and edges of your display under the same conditions.
Screen gradient and color banding test
Inspect grayscale and color transitions, subtle shade differences and visible banding.
Browser frame rate test
Measure requestAnimationFrame intervals and compare animation smoothness. Look for missed frames in this browser, not a certified panel refresh rate.
Touchscreen test
Trace the grid with a finger and see which areas receive touch events. Look for places where the line repeatedly breaks.
Multitouch test
Check how many simultaneous touch points your browser receives. Each finger appears as a separate point.
Chroma subsampling 4:4:4 test
Compare fine color and black-and-white stripes. Inspect color detail on a monitor or TV and download the pattern as a native-size PNG.
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