Patent ID: 8111004
Filing Date: 2012-02-07
Classification: G01J,G09G,H04N,H05B

Abstract:
1. A memory comprising discrete color points and suitable for use with a color navigation system generating light with a variable color, the color points defined according to three-dimensional CIELAB coordinates hue (H), lightness (L), chroma (C), with predefined intervals ΔH between neighboring color points in the hue direction, with predefined intervals ΔL between neighboring color points in the lightness direction, and with predefined intervals ΔC between neighboring color points in the chroma direction, respectively; wherein ΔL is equidistant over the color space; and wherein ΔS is equidistant over the color space, with ΔC=ΔS·L, S indicating saturation; such that the perceptual color difference ΔE is substantially constant over the color space for steps in the L direction and in the S direction; wherein f wherein, for hue values H between a first hue value (H wherein, for hue values between the second hue value (H wherein, for hue values between the third hue value (H wherein ΔH is a function of H such that, for steps in the hue direction along the border of the color space, said perceptual color difference ΔE