The distance LA0 - A1 between the coordinates A0(X0, Y0) and the coordinates A1(x1, y1) in the CIE 1931 chromaticity coordinate system satisfies LA0 - A1 ≤ 0.20.

The distance LA1 - A2 between the coordinates A1(x1, y1) and the coordinates A2(x2, y2) in the CIE 1931 chromaticity coordinate system satisfies 0.13 ≤ LA1 - A2 ≤ 0.35.

The organic electroluminescence element has a pair of electrodes and an emission layer provided between the electrodes and takes on the emission color of the coordinates A0(X0, Y0) in the CIE1931 chromaticity coordinate system.

Variation of chromaticity coordinates within a six-step MacAdam ellipse or less.

In this color space, L* indicates lightness and a* and b* are the chromaticity coordinates.

In the L*a*b* color space, L* indicates lightness and a* and b* are chromaticity coordinates.

In this space, L* indicates lightness and a* and b* are the chromaticity coordinates.

The controller is responsive to an input signal indicating a target color point (T) having target chromaticity coordinates (xT, yT) and target brightness (BT).

L* indicates lightness and a* and b* are the hue coordinates. +a* is the red direction, -a is the green, +b is the yellow, and -b is the blue direction.

L* indicates lightness and a* and b* are the hue coordinates. +a* is the red direction, -a is the green, +b is the yellow, and -b is the blue direction.