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EWG:Draft Oct 26 Luminance Contrast Ratio for Display

2.1-A - Luminance Contrast Ratio for Display

This page is the text proposed in the Nov Plenary Meeting.

Go to the Oct 26 Draft of this Provision

Go to the Sandbox of this Provision


Version 1 in Oct 26 Draft:
For displays on products, at least one mode must exist where the contrast ratio between the luminance at light state compared to luminance at dark state shall be 5:1.

  • Note: Light (or high) state typically refers to the lighter condition for the display. For example, white content/background on an LCD. Dark (or low) state typically refers to the darker condition for the display. For example, black content/background on an LCD.

Version 2 in Oct 26 Draft:
Remove this provision since display technologies have changed.

Version 3, proposed by Rob N, November 14, 2007 to address issues raised:
Products with displays must provide at least one mode where the contrast ratio between the luminance at light state compared to luminance at dark state is at least 5:1.

Note: Light (or high) state typically refers to the lighter condition for the display. For example, white content/background on an LCD. Dark (or low) state typically refers to the darker condition for the display. For example, black content/background on an LCD.

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