Lighting system and lighting device

A lighting device comprising:

• a communication module having a first communication chip supporting a first communication method, a second communication chip supporting a second communication method, and a shared antenna connected to and shared by the first and second communication chips;
• a light source having a plurality of light emitting diodes (LEDs);
• and
• a driver configured to drive the light source in response to a control command received by the communication module,
• wherein the first communication method and the second communication method are different,
• the first and second communication chips share the shared antenna in an activated state in a time division manner,
• the communication module processes a first RF signal based on the first communication method when the shared antenna is allocated to the first communication chip and not allocated to the second communication chip, and processes a second RF signal based on the second communication method when the shared antenna is allocated to the second communication chip and not allocated to the first communication chip, and
• at a first time while the first communication chip occupies the shared antenna, the communication module selectively activates the first communication chip and deactivates the second communication chip, and at a second time while the second communication chip occupies the shared antenna, the communication module selectively activates the second communication chip and deactivates the first communication chip.

A lighting system comprising:

• a plurality of lighting devices installed in a predetermined space and connected to one another to communicate directly with one another using a first communication method without communicating through a gateway;
• the gateway connected to at least one of the plurality of lighting devices to communicate with the plurality of lighting devices according to a second communication method;
• and
• a mobile device directly connected to at least one of the plurality of lighting devices to communicate therewith according to the first communication method,
• wherein the first communication method and the second communication method are different,
• each of the plurality of lighting devices includes a communication module configured to support the first communication method and the second communication method, and a driver configured to drive a light source in response to a control command received by the communication module, and
• when one of the plurality of lighting devices is directly connected to at least another one of the plurality of lighting devices using the first communication method, the one of the plurality of lighting device is disconnected from the gateway.