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In the ICDM DMS (Display Metrology Standard), we introduce a method to help quantify contrast for displays which have backlight dimming for low-level drive levels — Starfield Contrast. LCD Displays with Dynamic Contrast (global/local dimming) reduce the output level of the backlights for display content with low average content. At the extreme (for all black or near black content) the backlight might be turned off, giving very high contrast values which might even be stated as infinite. Starfield Contrast determines the contrast of a display with global/local dimming at the threshold as the dimming circuitry begins operation. It controls the dimming to determine the real contrast of the display and provides the highest contrast before the display goes into its dynamic mode.

*School of Public and Environmental Affairs, Indiana University, Bloomington, IN 47405–1701, U.S.A., email meretsky@indiana.edu †P.O. Box 16426, Portal, AZ 85632, U.S.A. ‡Department of Environmental Science, Policy & Management, 151 Hilgard Hall, University of California, Berkeley, CA 94720–3114, U.S.A. §Wind Wolves Preserve, P.O. Box 189, Maricopa, CA 93252, U.S.A. **Grambling Cooperative Wildlife Project, Grambling State University, P.O. Box 841, Grambling, LA 71245, U.S.A.