Active Diffuser System with Quantum Dots for LED Colour Rendering
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Solution Overview
Problem
LED luminaires often have inadequate colour rendering index, suffer from uneven aging of LEDs, and can produce mismatched colour perception when new or different manufacturers' units are integrated, leading to undesirable aesthetic effects and difficulty in adjusting illumination quality.
Innovation Solution
An active diffuser system incorporating quantum dots and a control system that adjusts light emission to improve colour rendering characteristics, compensate for LED aging, and correct for colour mismatches by using a second light source with optically transparent or translucent material, leaky optical fibers, and electrical stimulation of quantum dots, along with sensors to monitor and adjust the light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED luminaires are used to provide bright and efficient illumination, then energy efficiency and lifetime are improved, but colour rendering index deteriorates
Solution Approach 1:
The patent combines multiple LED types with different colour temperatures (e.g., cool white, warm white, yellow LEDs) within a single luminaire to achieve both energy efficiency and improved colour rendering. This merging of different LED types allows the system to maintain the energy benefits of LEDs while compensating for their poor colour rendering through complementary colour LEDs.
Solution Approach 2:
The patent employs composite lighting structures that integrate multiple LED types, phosphors, and optical elements to create a unified lighting system. This composite approach allows the different materials to work together, where each component contributes specific spectral characteristics that collectively improve colour rendering while maintaining energy efficiency.
2Reliability
If multiple types of LEDs are used in LED luminaires to improve colour rendering, then colour rendering index is improved, but device complexity increases
Solution Approach 1:
The patent divides the lighting system into distinct modular components, each containing specific LED types for particular colour rendering functions. This segmentation allows for easier manufacturing, assembly, and maintenance while managing the complexity of multiple LED types through organized modular architecture.
Solution Approach 2:
The patent designs a universal control system that can manage multiple LED types through a single interface, allowing the same control circuitry to regulate different LED colours and intensities. This multi-functionality reduces the need for separate control mechanisms for each LED type, thereby reducing overall device complexity.
3Reliability
If LEDs are permanently mounted on electronic circuit boards, then reliability is improved, but ease of repair deteriorates
Solution Approach 1:
The patent segments the LED assembly into replaceable modules that can be independently removed and replaced without replacing the entire luminaire. This modular segmentation maintains the reliability benefits of permanent mounting while enabling easy repair by allowing users to replace only the failed module rather than the entire unit.
Solution Approach 2:
The patent extracts the LED array from the circuit board as a separate replaceable component. This extraction allows the LEDs to be permanently mounted for reliability during operation, while enabling easy removal and replacement of the LED module when failure occurs, thus improving ease of repair without compromising the permanent mounting benefit during normal use.
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 active diffuser system enhances the colour rendering index, maintains consistent light quality over time, and adjusts for aesthetic and circadian rhythm purposes, improving the overall illumination quality and user experience.
Implementation Method 1
The second light source comprises quantum dots and one or more energy sources arranged to stimulate the quantum dots to emit light
Implementation Method 2
leaky optical fibers embedded in the sheet or disposed along its surface
Implementation Method 3
A diffuser is a component often added to a light source or luminaire in order to even out the spatial distribution of the light
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3(a)~3(b)
AI summary
Apparatus, methods and systems are provided for improving the quality of illumination from a luminaire. The apparatus, methods and systems provide quantum dots, methods and apparatus for stimulating device light emission from quantum dots, sensors, and controllers to adjust quality of illumination from a luminaire.