LED Lighting Device with Temperature Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lighting technologies, such as LEDs and CFLs, face challenges including high costs, dimming limitations, warm-up times, and disposal issues related to toxic materials like mercury, which deter consumer adoption.
Innovation Solution
A wireless lighting control system comprising a controller/processor, LED current control circuit, temperature sensor, and LEDs, enabling temperature compensation, color compensation, and calibration between lighting devices, along with a wireless controller for audio and video interface, processor, and communication circuit to control and automate lighting settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED current is increased to improve brightness, then illumination intensity is improved, but temperature increases causing color shift and reduced reliability
Solution Approach 1:
The patent implements a feedback control system where a temperature sensor continuously monitors the LED temperature and sends signals to the controller. The controller adjusts the LED current in real-time based on temperature readings, creating a closed-loop system that maintains optimal operating conditions while preserving brightness and color stability.
Solution Approach 2:
The patent dynamically changes the electrical parameters (current) of the LED based on temperature conditions. By adjusting the current parameter in response to temperature variations, the system maintains consistent color output and prevents thermal degradation while allowing for high brightness operation when conditions permit.
2Temperature
If LED current is reduced to lower temperature, then temperature is controlled, but illumination intensity decreases
Solution Approach 1:
The feedback mechanism allows the system to maintain the lowest possible current that still achieves the desired brightness level. By continuously monitoring temperature and adjusting current accordingly, the system operates at optimal efficiency points, reducing unnecessary current reduction while maintaining temperature control.
Solution Approach 2:
The patent employs dynamic current adjustment rather than static reduction. The current level is continuously adapted based on real-time temperature conditions, allowing the system to maximize brightness when thermal conditions permit and minimize current only when necessary for thermal management.
3Stability of the object's composition
If temperature compensation circuitry is added to maintain color stability, then color consistency is improved, but device complexity increases
Solution Approach 1:
The controller in the patent serves multiple functions: it manages LED current regulation, processes temperature sensor data, implements compensation algorithms, and controls color output. By making the controller multi-functional, the patent avoids adding separate dedicated circuits for each function, thereby reducing overall device complexity while achieving color stability.
Solution Approach 2:
The patent combines the temperature compensation functionality with the existing LED control circuitry. The temperature sensor, controller, and current regulation system are integrated into a unified control architecture, eliminating the need for separate compensation hardware and reducing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides flexible, energy-efficient, and portable lighting solutions that can be easily installed and transferred, offering personalized lighting options while reducing energy consumption and eliminating the need for specialized installation.
Implementation Method 1
A temperature of one or more portions of the lighting device is estimated using the temperature sensor
Implementation Method 2
a light emitting diode (LED) current control circuit communicably coupled to the controller/processor, one or more LEDs communicably coupled to the LED current control circuit
Data Source
AI summary
A lighting device having a plurality of analog LEDs mounted on a substrate, a plurality of addressable digital LEDs mounted on the substrate, a first LED circuit connected to the plurality of analog LEDs, and a second LED circuit connected to the plurality of addressable digital LEDs. The plurality of analog LEDs and the plurality of addressable digital LEDs are arranged in an array or pattern on the substrate.