COLOR-TUNABLE ILLUMINATION SYSTEM, LAMP AND LUMINAIRE

摘要

The invention relates to a color-tunable illumination system (10), to a lamp and to a luminaire. The color-tunable illumination system comprises a light source (20) emitting light of a first predefined color (B), and comprises a luminescent material (30) for converting light of the first predefined color into light of a second predefined color (A). The color-tunable illumination system further comprises shielding means (40, 42) arranged for preventing at least part of the light emitted by the light source to impinge on the luminescent material. The light source, the luminescent material and/or the shielding means are changeable from a first situation to a second situation. In the first situation the color-tunable illumination system is arranged for shielding at least part of the luminescent material against impinging light of the first predefined color. In the second situation the color-tunable illumination system is arranged for shielding less of the luminescent material to the light of the first predefined color emitted by the light source compared to the first situation. The effect of the measures according to the invention is that the shielding means, luminescent material and/or the light source determine an amount of light of the second predefined color emitted by the color-tunable illumination system which determines a color of the color-tunable illumination system.