Light-Emitting Device With Segmented Areas For Natural Color Appearance
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Solution Overview
Problem
Current light-emitting devices prioritize efficiency and color rendering index over color appearance, leading to unnatural and uncomfortable illumination, especially in indoor environments, where illuminance variations cause color perception issues like the Hunt effect, resulting in dull colors and hue deviations.
Innovation Solution
A light-emitting device with multiple light-emitting areas and a control element that adjusts spectral power distribution to achieve a natural, vivid, and comfortable color appearance by modifying luminous and radiant flux, correlated color temperature, and chromaticity points, allowing independent control of each light area for optimal illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light-emitting devices prioritize efficiency and color rendering index, then energy consumption is reduced and color accuracy is improved, but color appearance becomes unnatural and uncomfortable
Solution Approach 1:
The light-emitting device is divided into multiple light-emitting areas with different spectral characteristics. Each area emits light with specific color temperature and spectral power distribution, allowing independent optimization of energy efficiency and color appearance in different regions, thereby resolving the contradiction between efficiency and natural color perception
Solution Approach 2:
Different portions of the light-emitting device are assigned different spectral properties. Specifically, certain areas emit light with color temperatures and spectral distributions designed to reproduce natural outdoor illumination characteristics, while other areas optimize for energy efficiency. This local differentiation enables simultaneous achievement of natural color appearance and energy savings
2Illumination intensity
If light-emitting devices use higher illuminance, then color visibility is improved, but energy consumption increases and Hunt effect causes color perception issues
Solution Approach 1:
The device dynamically adjusts spectral power distribution parameters across different light-emitting areas to optimize color visibility at lower illuminance levels. By controlling the spectral composition rather than relying solely on intensity, the system achieves natural color appearance and reduced Hunt effect while consuming less energy
Solution Approach 2:
The light-emitting device incorporates dynamic control capabilities that allow real-time adjustment of spectral characteristics and luminous flux in different areas. This enables adaptation to various viewing conditions and illuminance levels, maintaining optimal color visibility without requiring high energy consumption
3Ease of manufacture
If light-emitting devices use multiple light-emitting areas with independent control, then color appearance and illumination quality are improved, but device complexity increases
Solution Approach 1:
The device is segmented into multiple independently controllable light-emitting areas, each with optimized spectral characteristics. This segmentation enables sophisticated illumination quality and natural color appearance while maintaining manageable complexity through modular design and independent control of each segment
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 solution provides a light-emitting device that replicates outdoor color appearance and comfort indoors, enhancing color visibility and legibility, even at lower illuminance, while allowing for user-adjusted color preferences and optimal illumination settings.
Implementation Method 1
a light-emitting device which includes M number of light emitting areas (M is 2 or greater natural number), and has the light-emitting elements in the light emitting areas
Data Source
AI summary
Described herein are light-emitting devices that incorporate at least one light-emitting element and that satisfy predetermined requirements, in which ϕSSL(λ) emitted from the light-emitting device satisfies predetermined conditions described herein.