Patent ID: 6299068
Filing Date: 2001-10-09
Classification: G06K

Abstract:
Optoelectronic label having optoelectric cells (1) arranged so as to intercept light (10) for supplying the optoelectronic label, an electronic memory (59) able to maintain its state in the absence of a power supply, a control circuit (61) connected to the electronic memory (59), several electrooptical means (6, 8) arranged so as to detect input light signals (11) and deliver output light signals (37) and a sequence generator (31) with a time base (30), characterized in that it has a shift register (41) registering the length of the input light signals (11), the shift register (41) is connected to a gate (35), said shift register (41) opening said gate (35) to the signal sequence (S1,S1+S2,S1+S2+S3) to be delivered to the outside when the length of the input light signals (11) exceeds an opening length and said shift register (41) closes said gate (35) to the signal sequence (S1,S1+S2, S1+S2+S3) to be delivered to the exterior when the length of the input light signals (11) exceeds a closing length, making it possible to activate or deactivate the optoelectronic label from the outside.