Illuminating device
AssigneeKoninklijke Philips Electronics N.V.
InventorsJuergen Flechsig, Carsten Marcel Riedel, Lutz Kaeseberg
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Abstract
An illuminating device is disclosed which comprises a light source (5) for generating light and an after-glowing material (for example a luminescent pigment), especially for emitting light after the light source is switched off or has extinguished. The after-glowing material is applied onto a carrier (1), which has a predetermined thermal isolation from the light source (5). By this, the duration of the after-glowing can be extended.
Claims10
Illuminating device comprising a light source (5, 6, 7) for generating light and an after-glowing material for emitting light after the light source (5, 6, 7) is switched off or has extinguished, wherein a carrier (1;
- 2;
- 3;
- 4) is provided onto which the after-glowing material is applied and which carrier (1;
- 2;
- 3;
- 4) is formed to surround at least a part of the light source (5, 6, 7) in a longitudinal and/or circumferential direction of the light source (5, 6, 7), and wherein at least one thermal isolation layer (8) is provided between the light source (5, 6, 7) and the carrier (1;
- 2;
- 3;
- 4) in order to decrease a heating of the carrier by the light source (5, 6, 7).
Dependencies are inferred from the claim text.