Electricity: power supply or regulation systems – In shunt with source or load – Using diode
Reexamination Certificate
2006-04-11
2006-04-11
Vo, Tuyet Thi (Department: 2821)
Electricity: power supply or regulation systems
In shunt with source or load
Using diode
C323S230000, C323S224000
Reexamination Certificate
active
07026799
ABSTRACT:
The invention relates to a circuit assembly for operating a luminous signal, particularly an LED signal, comprising at least one light-emitting diode (D) to which a resistance (R) is serially connected and a control (St) is connected in parallel. In order to adjust the luminous power of the luminous signal to various degrees of brightness during the day and at night, the control (St) is provided with a controlled source of current so as to specify a parallel current (I_P) which reduces the current (I_D) flowing through the light-emitting diode (D).
REFERENCES:
patent: 4198629 (1980-04-01), Marion
patent: 4731830 (1988-03-01), Thomson
patent: 5013926 (1991-05-01), Aizawa
patent: 5959413 (1999-09-01), Komarek et al.
patent: 6014600 (2000-01-01), Ferri et al.
Pöpplow Norbert
Zimmermann Dirk
Morrison & Foerster / LLP
Siemens Aktiengellschaft
Vo Tuyet Thi
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