| 摘要 |
1. Circuit arrangement for an illumination device in car radios, wherein the illumination device can be switched on via the equipment switch (S2) of the car radio or at the same time as the instrument illumination (S1, L1), characterized in that the light source of the illumination device (L2) can be switched on and controlled (S1, RA ) via the instrument illumination (L1) by a first circuit stage (1) independently of the operating condition of the car radio, that, if necessary, a certain area of illumination (L3) of the car radio can be switched on of the remaining light source only via the equipment switch (S2) by a second circuit stage (2) and that in addition the total illumination (L2, L3) of the car radio can be switched on in familiar manner via the equipment switch (S2) with a predetermined background brightness when the instrument illumination (L1, S1) is not switched on. |
