LED Lighting Apparatus with Dual Color Temperature Control
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Solution Overview
Problem
Traditional lighting technologies, such as fluorescent lamps, face issues with high costs, environmental contamination, and temperature sensitivity, while early LEDs were limited in application due to high cost and restricted color output, necessitating a cost-effective solution for controlling light in modern settings.
Innovation Solution
A lighting apparatus comprising a light source with two sets of LED modules emitting different color temperatures, a detector to recognize operation patterns from a wall switch, and a driver that generates currents to adjust luminance and color temperature, utilizing a lower-cost circuit design to decode and dispatch currents for desired light settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional fluorescent lamps are used, then lighting coverage is adequate, but environmental contamination occurs due to mercury leakage
Solution Approach 1:
The patent transitions from fluorescent lamp technology to LED technology, fundamentally changing the light generation mechanism from mercury vapor excitation to electroluminescence. This parameter change eliminates mercury contamination while maintaining lighting performance through the use of LED modules with appropriate phosphor coatings that convert blue or UV light to visible spectrum light.
2Object-affected harmful factors
If early commercial LEDs are used, then environmental friendliness is improved, but cost is extremely high limiting practical application
Solution Approach 1:
The patent divides the lighting system into multiple LED modules, each containing multiple LED chips. This segmentation allows for cost-effective manufacturing by using standard LED components while achieving the desired lighting effects through modular assembly and control of multiple modules with different color temperatures.
Solution Approach 2:
The patent uses LED modules that can serve multiple functions: providing illumination, adjusting color temperature, and enabling dimming control. By using white light LEDs with phosphor conversion, the system achieves both environmental benefits and cost-effectiveness while maintaining versatility in lighting applications.
3Ease of manufacture
If early red LEDs are used, then manufacturing cost is reduced, but illumination capability is insufficient for area lighting
Solution Approach 1:
The patent transitions from early red LED technology to modern white light LEDs using phosphor conversion. This parameter change in light generation methodology enables high brightness output across the visible spectrum while maintaining cost-effectiveness through established manufacturing processes for white LEDs.
4Illumination intensity
If fluorescent lamps are used, then lighting coverage is adequate, but temperature sensitivity reduces efficacy in extreme conditions
Solution Approach 1:
The patent replaces fluorescent lamp technology with LED technology, fundamentally changing the operating temperature characteristics. LEDs maintain high efficiency and stable performance across a wide temperature range because they are solid-state devices that do not rely on gas discharge or phosphor excitation by UV radiation, which are temperature-sensitive processes in fluorescent lamps.
5Ease of operation
If simple wall switch control is used, then ease of operation is improved, but ability to adjust luminance and color temperature is limited
Solution Approach 1:
The patent integrates multiple control functions into a single wall switch interface. The switch can detect different operation patterns (single press, double press, long press, rotating) to provide diverse lighting modes including on/off, dimming levels, and color temperature adjustment. This makes the simple wall switch serve multiple functions, maintaining ease of operation while achieving lighting control flexibility.
Solution Approach 2:
The system incorporates a detector that monitors wall switch operations and provides feedback to the driver circuit. Based on the detected operation patterns, the system automatically adjusts lighting parameters such as luminance and color temperature, creating a closed-loop control system that translates simple user actions into complex lighting adjustments.
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
Enables cost-effective adjustment of color temperature and luminance levels without complex circuitry, providing flexible and efficient lighting options suitable for various applications.
Implementation Method 1
Electroluminescence, an optical and electrical phenomenon, was discover in 1907. Electroluminescence refers the process when a material emits light when a passage of an electric field or current occurs.
Implementation Method 2
The detector is used for detecting an operation pattern corresponding to one of a plurality of operation modes. The operation pattern is transmitted from an operation on a wall switch electrically connected to the lighting apparatus.
Implementation Method 3
The driver generates a first current to the first set of LED modules and a second current to the second set of LED modules based on the operation mode associated with the detected operation pattern.
Data Source
AI summary
A lighting apparatus includes a light source, a detector and a driver. The light source includes a first set of LED modules and a second set of LED modules. The first set of LED modules and the second set of LED modules emit lights with different color temperatures. The detector is used for detecting an operation pattern corresponding to one of a plurality of operation modes. The operation pattern is transmitted from an operation on a wall switch electrically connected to the lighting apparatus. The driver generates a first current to the first set of LED modules and a second current to the second set of LED modules based on the operation mode associated with the detected operation pattern. The operation mode corresponding to both a corresponding luminance level and a corresponding color temperature at the same time.