Local Dimming Transition Inspection

Sweeps high-contrast geometry across the display to expose zone grid transitions. Strictly named "Transition Inspection" rather than a zone counter.

Technical Scope & Limitations

Inspection only. Browsers cannot count physical zones. Observed transitions reflect software zone mapping.

Browser rendering output can be influenced by OS display scaling, GPU driver color settings, and active HDR profiles.

Testing Instructions

Watch the wide bright bar as it sweeps across the screen.
Notice any abrupt stepped brightness jumps as the pattern passes from one backlight zone to the next.
Observe whether transitions are smooth or cause noticeable stepping in surrounding dark areas.

Interaction Controls

Next Pattern

→Space

Previous Pattern←

Exit FullscreenEsc

Mouse / TouchTap screen to cycle

Zone Transition InspectionPress ESC to exit

What This Test Checks

Smoothness of brightness transitions as moving highlights pass from one backlight zone into the next.
Prevention of abrupt stepped brightness jumps in adjacent dark zones.
Backlight algorithm spatial filtering behavior.

How to Perform the Test

Enter fullscreen mode in dim ambient lighting.
Watch the wide vertical bright bar as it sweeps continuously across the screen.
Notice any abrupt stepped brightness jumps in the surrounding black space.

What to Look For

Seamless, gradual illumination indicates well-tuned backlight zone smoothing algorithms. Distinct step jumps indicate aggressive or unbuffered zone switching.

Common Display Problems & Diagnostic Guidance

Abrupt Step Jumps

When backlight firmware switches zones abruptly with zero spatial blending, moving content creates distracting rectangular brightness flickers.

Frequently Asked Questions

Does this test count the physical number of zones on my monitor?

No. Do not use this test as a zone counter. Observed transitions reflect how the monitor firmware blends zones together, not the raw count of physical LED clusters.