Lighting Control Device Indirect Electrical Supply Detection

The patent introduces an intermediary approach by using the power factor correction circuit as a mediator to indirectly detect electrical supply status. Instead of directly measuring the electrical supply voltage with additional detection inputs, the system uses the existing PFC circuit's feedback variables (switching frequency, current, voltage) to infer the electrical supply state. This intermediary method resolves the contradiction by achieving detection accuracy through the PFC circuit's inherent measurements without adding direct detection inputs.

The patent applies the self-service principle by enabling the power factor correction circuit to serve dual purposes: its primary function of power factor correction and its secondary function of electrical supply detection. The PFC circuit's existing feedback mechanisms are leveraged to detect electrical supply failures, eliminating the need for separate detection hardware. This self-service approach allows the same circuit components to perform multiple functions, thereby improving detection accuracy without increasing device complexity.

The patent applies dynamics by transitioning from static threshold-based control to dynamic evaluation of electrical supply status. Instead of using fixed voltage thresholds that fail under varying loads, the system dynamically assesses the electrical supply state by analyzing feedback variables from the PFC circuit (switching frequency, current, voltage) in real-time. This dynamic approach maintains ease of operation through automated control while significantly improving reliability under varying load conditions by adapting to actual system state.

The patent implements feedback by utilizing the PFC circuit's feedback variables (switching frequency, current, voltage) to continuously monitor and determine electrical supply status. The control unit evaluates these feedback signals to detect electrical supply failures reliably, even when loads vary. This feedback mechanism replaces simple threshold switching with intelligent, adaptive control that maintains both operational simplicity and detection reliability across different operating conditions.

The patent applies universality by making the power factor correction circuit multi-functional. The PFC circuit not only performs its primary power factor correction function but also serves as an electrical supply detection system. By extracting electrical supply status information from the PFC circuit's existing feedback variables (switching frequency, current, voltage), the system achieves accurate electrical supply measurement without adding dedicated detection inputs. This multi-functional approach resolves the contradiction by using existing components for dual purposes.

The patent uses the PFC circuit as an intermediary to bridge the gap between power conversion and electrical supply detection. Instead of directly measuring electrical supply voltage with additional inputs, the system uses the PFC circuit's inherent measurements of switching frequency, current, and voltage as intermediary data to infer the electrical supply state. This intermediary approach achieves measurement precision through indirect but accurate inference without increasing control unit input quantity.