US Pat. No. 10,143,064

MODULAR LED LIGHTING SYSTEM HAVING EMERGENCY LIGHT FUNCTION

Tridonic AG, Ennenda (CH...

1. A modular LED lighting having a first module (1) and a second module (2), an emergency light operating circuit, a rechargeable energy store (ES), an LED module (F), and a communication interface (6),wherein the first module (1) is configured to be supplied with a first AC supply voltage (9) and wherein the first module (1) comprises:
a first submodule (A), a second submodule (B) and a control unit (G), wherein the first submodule (A) is configured for being supplied with the AC supply voltage (9) and for providing DC voltage to a second submodule (B),
wherein the second submodule (B) comprises
a half bridge inverter comprising a series connection of a first switch (S1) with a second switch (S2), wherein the half bridge inverter is configured and arranged to receive the first DC voltage from the first submodule (A),
a storage capacitance (23) connected to a first rectifier (22) and a third submodule (C) of the second module (2),
a transformer (19) having a primary winding and a first secondary winding inductively coupled to the primary winding,
the first rectifier (22) being configured to convert a second AC voltage applied at the first secondary winding into a second DC voltage and being connected to the storage capacitance (23) and the first secondary winding of the transformer (19),
a measuring resistor (24),
a resonant circuit (15) comprising a series connection of a first inductance (16) with a coupling capacitor (17), wherein the first inductance (16) is connected to a point between the first and second switch and connected to the coupling capacitor (17), and the coupling capacitor (17) is further connect to a first end of the primary winding, wherein a second end of the primary winding is connected to ground as well as to the measuring resistor (24),
wherein the measuring resistor (24) is arranged in a series connection with the first and second switch and at the same time connected to ground as well as to the second end of the primary winding;
wherein the control unit (G) is configured and arranged to generate drive signals for clocking the first and second switch based on a voltage drop at the measuring resistor (24),
wherein the second module (2) comprises:
a control unit (E),
the third submodule (C), wherein, during a normal operation, the third submodule (C) is configured and arranged for being supplied with the second DC voltage that is output by the second submodule (B) of the first module (1) and that is supplied to the third submodule (C) from the second submodule (B) of the first module (1) to the third submodule (C), thereby providing a power supply (5) from the second submodule (B) of the first module (1) to the third submodule (C),
wherein the LED module (F), which has at least one LED path (8), is configured and arranged for being supplied by the third submodule (C), wherein the control unit (E) is configured and arranged to control the supply based on feedback values supplied from the LED module (F) to the control unit (E),
wherein the first module (1) and the second module (2) are configured and arranged to communicate via the communication interface (6),
wherein a charging circuit of the emergency light operating circuit comprises a second secondary winding (83) inductively coupled to the first secondary winding of the transformer (19) and a second rectifier (84) connected to the first secondary winding and connected to the rechargeable energy store (ES), wherein the second rectifier (84) is configured to convert a third AC voltage applied at the first secondary winding into a third DC voltage by means of which the rechargeable energy store (ES) is recharged in the normal operation;
wherein a discharge circuit (81) of the emergency light operating circuit is configured and arranged to use the rechargeable energy store (ES) to take over a feeding of the LED module (F) in an event of failure of the first AC supply voltage (9), wherein the discharge circuit (81) is coupled to the second submodule (B) of the first module (1) and, in the event of failure of the first AC supply voltage (9), is configured to feed the second module (2) via said power supply (5) from the second submodule (B) of the first module (1) to the further submodule (C) used during the normal operation, and
wherein, in the event of failure of the first AC supply voltage (9), the first module (1) is configured to transmit a control command via the communication interface (6) and the second module (2) is configured to adapt its operation in response to the transmission of the control command.

US Pat. No. 9,220,150

MODULAR LED LIGHTING HAVING AN EMERGENCY LIGHT FUNCTION

Tridonic AG, Ennenda (CH...

1. A modular LED lighting having a first module (1) to which an AC supply voltage (9) can be supplied and which has:
a second submodule (B), at the output of which a DC supply voltage (5) electrically isolated from the AC supply voltage is provided, and

a control unit (G),
furthermore having a second module (2), preferably a lamp management module, which has a further submodule (C), supplied with the DC supply voltage (5) of the first module (1), preferably a constant-current source which is controlled by a control unit (E) of the second module (2),

an LED module (F) which has at least one LED path (8) and which is supplied by the further submodule (C), and an emergency light operating circuit which is connected to a rechargeable
energy store (ES) and takes over the feeding of the modular LED lighting in the event of failure of the AC supply voltage
(9).

US Pat. No. 9,060,406

POWER REGULATION OF LED BY MEANS OF AN AVERAGE VALUE OF THE LED CURRENT AND BIDIRECTIONAL COUNTER

TRIDONIC GMBH and CO KG, ...

1. A method for regulation of an LED of an output circuit with a converter having a switch, the method comprising:
actively clocking the switch to magnetize an inductance in an inductor;
measuring an actual value representative of an average value of the LED current (ILED) for use as a feedback variable;

comparing the actual value to a reference value (IAVG¬óDESIRED); and

regulating the LED based on the comparison of the actual value to the reference value.

US Pat. No. 9,326,351

LED CONTROLLER COMPRISING A CLOCKED CURRENT SOURCE

Tridonic AG, Ennenda (CH...

1. An LED operating circuit, having:
a circuit block for providing an adjustable DC voltage, and
a clocked constant current source, supplied with the DC voltage, with a switch (S), which is clocked by a control circuit
in such a way that a reduction in the switch-on time period ton of the switch (S) results in a reduction in the power provision, wherein, starting from the constant current source, one or
more LEDs can be supplied,

wherein the control unit is designed to vary at least one further control variable of the constant current source or of the
circuit block for DC provision, in addition to the reduction in the switch-on time period (ton), and

wherein the control unit is designed to reduce the power provision of the constant current source by varying the at least
one further control variable of the constant current source or of the circuit block for DC provision, in case the switch-on
time period (ton) corresponds to a preset minimum value (ton_min).

US Pat. No. 9,693,402

MODULAR LED-LIGHTING SYSTEM

Tridonic AG, Ennenda (CH...

1. A modular LED lighting having a first module (1), to which an AC input voltage (9) can be supplied and which has a first submodule (A), a second submodule (B), and a control unit (G), wherein:
the first submodule (A) is configured to convert the AC input voltage (9) to a DC voltage to be supplied to the second submodule (B);

the second submodule (B) is an insulated energy-transferring DC/DC converter and comprises an inverter (14), a resonant circuit (15), a transformer (19), which isolates an DC output voltage (5) electrically from the AC input supply voltage (9), and a rectifier (22); and

several second modules (2), each second module (2) of the several second modules (2) having a further submodule (C) and a control unit (E), wherein the further submodule (C) of the second module (2) is supplied with the DC output voltage (5) of the first module (1), and is a clocked constant-current source which is controlled by the control unit (E) of the second module (2) and wherein the several second modules (2) are selectively selectable for switching off the selected second modules (2); and

an LED module (F) which has at least one LED path (8) and which is supplied by the further submodule (C).

US Pat. No. 9,693,407

LED-LIGHTING SYSTEM COMPRISING AN OPERATIONAL DATA MEMORY

Tridonic AG, Ennenda (CH...

1. An LED operating circuit, in which a first module (1) powered by input voltage (9) is upstream of a second module (2), the second module (2) having a further submodule (C) supplies an LED module (F) which has one or more LED paths (8), a control unit (E) of the second module (2) being designed to access a memory (4) of the LED module (F) in order to read out an identification of the LED module (F) or in order to read out data stored in
the memory (4) and being designed to transmit said data to the first module (1) upstream of the second module (2) via a communication interface (6),
wherein downstream is a direction that electricity flows from the input voltage (9) to the LED module (F) and upstream is opposite to downstream.

US Pat. No. 9,137,861

CIRCUIT FOR THE OPERATION OF AT LEAST ONE LED

TRIDONIC GMBH and CO KG, ...

1. A driver circuit for at least one LED, the driver circuit comprising:
input terminals to be connected to an input or operating voltage in the form of a direct current (DC) voltage or a rectified
alternating (AC) voltage,

output terminals to be connected to a load circuit, said load circuit containing the at least one LED,
an inductor,
a clocked switch,
a control circuit for clocking the switch, said control circuit comprising an integrated circuit (IC) having input and output
pins,

wherein the control circuit generates a clock signal for the switch based on at least two actual value signals,
wherein the two actual value signals are associated with different switching phases of the switch,
wherein the inductor is connected in such a way that it is charged in one switching phase of the switch and is discharged
in another switching phase,

and wherein a current is driven through the load circuit, at least in the other switching phase,
such that the two actual value signals are tapped off in different time periods or at different times, but at a common measurement
point in the driver circuit.