Abstract: Passive diffuser frame uses light emitted from a video display front face to produce cold emission ambient lighting effects, having a light guide capturing display image light and in optical communication with a distributive outer frame that redirects that light. The ambient light can be diffuse, non-image forming, directed as spill light or to a light pipe. A goniophotometric element or goniochromatic element allows changing intensity or color of ambient light as a function of viewing angles. The light guide can use a prism splitter or partial reflector, to redirect light and allow viewing the original display image simultaneously. Additive and subtractive color mixing and photoluminescent substances allow new chromaticities, including fluorescent colors and new colors outside of the gamut of output light colors inherently producible by the unaided video display unit.

Abstract: Extracting and processing video content encoded in a rendered color space to be emulated by an ambient light source, using perceptual rules for intelligent dominant color selection. Steps include quantizing the video color space; performing dominant color extraction by using a mode, median, mean, or weighted average of pixel chromaticities; applying perceptual rules to further derive dominant chromaticities via [1] chromaticity transforms; [2] a weighted average using a pixel weighting function influenced by scene content; and [3] extended dominant color extraction where pixel weighting is reduced for majority pixels; and [4] transforming the dominant color chosen to the ambient light color space using tristimulus matrices. A color of interest can be further analyzed to produce a true dominant color, and past video frames can guide selection of dominant colors in future frames.