LED lighting system
View Patent ↗The invention describes an LED lighting system ( 1 ) comprising a wireless communication arrangement ( 11, 12 ) for wireless transfer of signals (D 10 _ 11 , D 11 _ 12 , D 4 _ 12 , D 5 _ 12 ) between devices ( 10, 11, 12, 4, 5 ) of the LED lighting system ( 1 ); at least one LED lamp ( 10 ) connectable to a mains power supply ( 2 ), which LED lamp ( 10 ) comprises a driver arrangement ( 100 ) with a control unit ( 102 ) for controlling the LED lamp ( 10 ) according to a received signal (D 10 _ 11 ); a phase-cut detector ( 103 A, 103 B, 103 C) realized to detect a phase-cut input (V cut ) to the LED lamp ( 10 ); and a protection circuit ( 106 ) realized to prevent operation of the LED lamp ( 10 ) with the phase-cut input (V cut ) if the phase-cut angle of the phase-cut input (V cut ) exceeds a critical threshold, wherein said protection circuit ( 106 ) is adapted to prevent an exposure of the LED lamp to the phase-cut input. The invention further describes an LED lamp ( 10 ) comprising a driver arrangement ( 100 ); and a method of controlling an LED lighting system ( 1 ).
1. An LED lighting system comprising a wireless communication arrangement for wireless transfer of signals (D 10 _ 11 , D 11 _ 12 , D 4 _ 12 , D 5 _ 12 ) between devices of the LED lighting system; the LED lighting system comprising:
at least one LED lamp connectable to a mains power supply, wherein the LED lamp includes a driver arrangement, wherein the driver arrangement includes,
a control unit for controlling the LED lamp according to a received signal (D 10 _ 11 ) received from the wireless communication arrangement of the LED lighting system;
a phase-cut detector realized to detect a phase-cut input (V cut ) to a driver of the driver arrangement; and
a protection circuit realized to prevent operation of the LED lamp with the phase-cut input (V cut ) as long as a phase-cut angle of the phase-cut input (V cut ) exceeds a critical threshold by preventing an exposure of the LED lamp to the phase-cut input, and
a remote-controlled dimmer device, and wherein the protection circuit is realized to issue a phase-cut angle correction signal (D 5 _ 12 ) over the wireless communication arrangement to the remote-controlled dimmer device.
2. The LED lighting system according to claim 1 , wherein the phase-cut detector is realized to detect the phase-cut angle (ϕ) of a phase-cut dimmer.
3. The LED lighting system according to claim 2 , wherein the phase-cut detector comprises a driver current monitoring circuit.
4. The LED lighting system according to claim 1 , wherein the protection circuit is realized to place the LED lamp in a standby mode of operation, and/or the protection circuit is realized to issue the phase-cut angle correction signal (D 5 _ 12 ) over the wireless communication arrangement to the remote-controlled dimmer device.
5. The LED lighting system according to claim 1 , wherein said devices of the LED lighting system are realized to communicate according to a Zigbee specification.
6. A method of controlling an LED lighting system, which method comprises steps of:
providing a wireless communication arrangement for wireless transfer of signals (D 10 _ 11 , D 11 _ 12 , D 4 _ 12 , D 5 _ 12 ) between devices of the LED lighting system;
providing at least one LED lamp connectable to a mains power supply, which LED lamp comprises a driver arrangement with a control unit for controlling the LED lamp according to a received signal (D 10 _ 11 );
detecting a phase-cut input (V cut ) to the LED lamp; and
preventing operation of the LED lamp with the phase-cut input (V cut ) by preventing an exposure of the LED lamp to the phase-cut input, as long as a phase-cut angle of the phase-cut input (V cut ) exceeds a critical threshold, and
issuing a phase-cut angle correction signal (D 5 _ 12 ) over the wireless communication arrangement to a remote-controlled dimmer device of the LED lighting system to adjust the phase-cut angle of the remote-controlled dimmer device to a minimum value.
7. The method according to claim 6 , wherein the step of preventing operation of the LED lamp with the phase-cut input (V cut ) comprises a step of issuing a message (D 10 _ 11 , D 11 _ 12 , D 4 _ 12 ) over the wireless communication arrangement for presentation by a software application running on a communications device of a user of the LED lighting system.
8. The method according to claim 7 , wherein the message (D 4 _ 12 ) comprises a set of instructions to assist the user in correcting a configuration of the LED lighting system.
9. The method according to claim 6 , further comprising the step of driving the LED lamp to generate a visual warning to a user of the LED lighting system.
10. The method according to claim 6 , further comprising the steps of:
detecting a permissible input (V OK ) to the LED lamp; and
resuming operation of the LED lamp with the permissible input (V OK ).
11. An LED lamp having a driver arrangement, wherein the driver arrangement comprises
a control unit for controlling the LED lamp according to a received signal (D 10 _ 11 ) received from a wireless communication arrangement of an LED lighting system;
a phase-cut detector realized to detect a phase-cut input (V cut ) to a driver of the driver arrangement; and
a protection circuit realized to prevent operation of the LED lamp with the phase-cut input (V cut ) as long as a phase-cut angle of the phase-cut input (V cut ) exceeds a critical threshold by preventing an exposure of the LED lamp to the phase-cut input, and
wherein the protection circuit is realized to issue a phase-cut angle correction signal (D 5 _ 12 ) over a wireless communication arrangement to a remote-controlled dimmer device.