Lighting Device With Segmented Side Covers
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Solution Overview
Problem
Existing lighting devices with multiple light emitters face challenges in achieving efficient color mixing and flexible emitter arrangements due to limitations in light transmission and reflection, leading to suboptimal luminance efficiency and color rendering properties.
Innovation Solution
The lighting device incorporates two or more light emitters with p-n junctions, each partially covered by a side cover and a light-transmitting layer containing phosphors, allowing for flexible arrangements such as linear, non-linear, or matrix configurations, and enabling efficient mixing of light with different emission spectra through the use of separate side covers and light-transmitting layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple light emitters are arranged in a single sealed resin layer, then manufacturing is simplified, but light transmission and color mixing efficiency deteriorate
Solution Approach 1:
The patent divides the light-emitting structure into multiple independent light emitters, each with its own side cover and light-transmitting layer. This segmentation allows each emitter to be optimized separately for light extraction and color mixing, improving overall luminance efficiency while maintaining manufacturing simplicity through modular assembly.
Solution Approach 2:
The patent introduces vertical stacking of multiple light emitters arranged to face each other, transitioning from a planar single-layer configuration to a three-dimensional multi-layer structure. This dimensional change enables improved light transmission paths and color mixing between adjacent emitters, enhancing luminance efficiency without complicating the manufacturing process.
2Manufacturing precision
If light emitters are arranged in a fixed configuration, then manufacturing precision is improved, but adaptability for different applications deteriorates
Solution Approach 1:
The patent enables dynamic reconfiguration of light emitters by providing independent side covers and light-transmitting layers for each emitter. This allows the arrangement to be adapted from linear to matrix configurations or other patterns based on application requirements, while maintaining precise positioning through the modular structure that facilitates controlled assembly.
Solution Approach 2:
The patent creates a universal light emitter module that can function in multiple configurations. Each light emitter with its side cover and light-transmitting layer forms a self-contained unit that can be arranged in various patterns (linear, non-linear, matrix) to suit different applications, achieving both manufacturing precision and arrangement flexibility.
3Reliability
If side covers fully enclose light emitters, then light leakage is prevented, but light distribution and color mixing efficiency deteriorate
Solution Approach 1:
The patent applies side covers selectively to specific portions of light emitters rather than full enclosure. This local application allows light to be contained where needed to prevent leakage while maintaining open areas for efficient light distribution and color mixing between adjacent emitters, resolving the contradiction between reliability and efficiency.
Solution Approach 2:
The patent uses partial side covers that enclose only certain portions of the light emitters. This partial action provides sufficient light containment to prevent leakage while leaving enough exposed surface area for effective light distribution and color mixing, achieving both reliability and color mixing efficiency.
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
This configuration enhances color rendering properties and luminance efficiency by allowing for customizable color mixing and improved light distribution, with the ability to adjust the height and position of side covers for optimal light emission.
Implementation Method 1
a first light-transmitting layer comprising a phosphor that can be excited by light from the first light emitting element
Data Source
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AI summary
In a first aspect of the present invention, a lighting device (100) includes a first light emitter (1) that includes a first light-emitting element (10) with a p-n junction (lOg), and a first side cover (11) partly covering a peripheral side surface (lOc-lOf) of the first light- emitting element (10); a second light emitter (2) that includes a second light-emitting element (20) with a p-n junction (20g) and a second side cover (21) partly covering a peripheral side surface (20c-20f) of the second light-emitting element (20), and the first light emitter (1) and the second light emitter (2) are disposed to face each other at uncovered side portions (10c, 20c) that are uncovered by the first side cover (11) and the second side cover (21). It is disclosed that the first side cover (11) covers a quarter or more area of the peripheral side surface (lOc-lOf) of the first light-emitting element (10).