Modern displays with Full-Array Local Dimming (FALD) present a challenge for PLUGE. If the PLUGE pattern is small, the display’s dynamic dimming algorithm may interpret the scene as mostly dark and lower the backlight intensity aggressively. This can result in a "false black," where the background appears darker than the calibration target. Conversely, the sudden appearance of a +4% bar might trigger the backlight to spike. To mitigate this, PLUGE patterns for FALD sets are often rendered as full-field signals or embedded within a field of "video level" noise to force the backlight driver into a steady state.
Organic Light-Emitting Diode (OLED) displays offer a distinct advantage: perfect blacks. When a pixel displays Reference Black, it emits zero light. pluge pattern
A typical PLUGE pattern has a dark background (near-black) and three vertical bars. Modern displays with Full-Array Local Dimming (FALD) present
HDR calibration is more complex because OLEDs and LEDs handle "near-black" differently. However, many HDR test suites still use a version of the Pluge pattern to ensure the display's tone mapping isn't "clipping" shadow detail. The Bottom Line Conversely, the sudden appearance of a +4% bar