Patent ID: 7391337

Claim:
A bi-directional communication system for communicating between a control station, which receives and outputs control signals, and one or more display cabinets, the system comprising: LEDs for illuminating objects disposed about the cabinets; addressable nodes for interactively communicating with the control station and selectively operating the LEDs, each node being coupled to the control station and associated LEDs; and a signal generator at the control station for receiving information from each addressable node and generating corresponding output signals which are indicative of a desired activation state sequence for the associated LEDs; wherein each node includes: a sensor for detecting a change in an environment and sending a corresponding input signal to the control station, the sensor being disposed about the cabinet; and an addressable power supply which selectively changes an activation state of selected associated LEDs in response to being addressed by the control station, which activation state change is based on the received sensor input signal and predetermined LEDs' activation state sequence.