| 摘要 |
A colour detecting electronic system has circuitry with at least two channels that comprise each a photosensitive element (2, 7) and a signal amplifier (4, 9). The light falling on the photosensitive elements previously goes through optic filters (1, 6) transparent for various colours. An evaluating circuit (5) correlates the signals in the various channels and delivers an output signal which is representative of the presence of given colours in the light falling on the optic filters (1, 6) or of a change in its colour composition. |
