ILLUMINATING DEVICE
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.
1 . 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 ).
2 . Illuminating device according to claim 1 ,
wherein the light source ( 5 , 6 , 7 ) comprises a lamp bulb ( 5 ) which is at least partly coaxially or concentrically surrounded by the carrier ( 1 ; 2 ; 3 ; 4 ), and a socket ( 6 ) at which the carrier ( 1 ; 2 ; 3 ; 4 ) rests or abuts.
3 . Illuminating device according to claim 1 ,
wherein at least one thermal isolation layer ( 8 ) comprises or is formed by a predefined gap or a predefined distance between the light source ( 5 , 6 , 7 ) and the carrier ( 1 ; 2 ; 3 ; 4 ) with air in between both.
4 . Illuminating device according to claim 1 ,
wherein at least one thermal isolation layer ( 8 ) comprises or is formed by a thermally isolating material.
5 . Illuminating device according to claim 1 ,
wherein the material of the carrier ( 1 ; 2 ; 3 ; 4 ) onto which the after-glowing material is applied is made of a metal or a translucent material.
6 . Illuminating device according to claim 1 ,
wherein the carrier ( 1 ; 2 ; 3 ; 4 ) comprises at least one ring ( 11 ; 21 , 22 ; 31 ; 41 ) with a diameter which is dimensioned for coaxially or concentrically surrounding the light source ( 5 , 6 ).
7 . Illuminating device according to claim 1 ,
wherein the carrier ( 1 ; 2 ; 3 ; 4 ) comprises two cylindrical rings ( 21 , 22 ) which are arranged coaxially or concentrically to each other and which are fixed to each other by means of at least one connector ( 23 ) which is positioned between the rings ( 21 , 22 ).
8 . Illuminating device according to claim 6 or 7 ,
wherein at least one ring ( 41 ) of the carrier ( 1 ; 2 ; 3 ; 4 ) is provided with at least one cooling rib ( 44 ).
9 . Illuminating device according to at least one of claims 6 to 8 ,
wherein the at least one ring ( 31 ; 41 ) is provided with at least one leg ( 32 ; 42 ) for supporting the ring at a socket ( 6 ) of the light source ( 5 , 6 , 7 ).
10 . Illuminating device according to claim 9 ,
wherein two slits ( 33 ; 43 ) are provided into the ring ( 31 ; 41 ) extending at both sides of and parallel to the at least one leg ( 32 ; 42 ).