Programmable Light Engine for Consistent CCT and Dimming
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Solution Overview
Problem
Existing LED lighting systems struggle to maintain consistent correlated color temperature (CCT) and dimming levels across multiple fixtures due to component variances and temperature changes, leading to noticeable color differences.
Innovation Solution
A programmable light engine and programming device that utilize shunt regulators, switches, and analog components to provide precise CCT and dimming signals within 0.5% of the desired output level, ensuring consistent color and dimming across all fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional LED fixtures are used without programming circuits, then the device complexity is low, but the manufacturing precision of CCT and dimming levels is poor due to component variances
Solution Approach 1:
The patent changes the electrical parameters (voltage levels) to represent different CCT and dimming settings. By varying the voltage signal levels sent to LED fixtures, the system can precisely control color temperature and brightness without requiring complex hardware modifications to each fixture. This parameter-based control achieves manufacturing precision while keeping individual fixture complexity low.
Solution Approach 2:
The patent introduces a programming device as an intermediary between the control system and LED fixtures. This intermediary translates user preferences into standardized electrical signals that can be universally understood by fixtures, eliminating the need for complex individual configuration of each fixture while maintaining high precision control.
2Reliability
If component variances are not compensated, then the device complexity is low, but the reliability of consistent color output across fixtures is poor
Solution Approach 1:
The patent implements a feedback mechanism where the programming device receives information about actual fixture output and adjusts control signals accordingly. This closed-loop approach compensates for component variances by continuously monitoring and correcting deviations, ensuring reliable color consistency across all fixtures without requiring complex hardware compensation circuits in each fixture.
3Manufacturing precision
If precise CCT control within 0.5% variance is implemented, then the manufacturing precision is high, but the use of energy for signal processing increases
Solution Approach 1:
The patent replaces complex mechanical or hardware-based precision control mechanisms with electrical signal processing. By using voltage-level signaling to encode CCT and dimming information, the system achieves 0.5% precision control with minimal energy consumption, as electrical signals require far less energy than mechanical adjustment mechanisms or complex analog circuitry.
Data Source
AI summary
A programming device includes a plurality of signal lines including a first signal line and a common ground line, and a first programming circuit coupled between the first signal line and the common ground line, and including a first configurable switch configured to receive a first switch configuration, the first programming circuit being configured to receive a first power signal from the first signal line and to supply a first programming signal to the first signal line, the first programming signal having a level corresponding to the first switch configuration.