Light-Emitting Module Recess Design for Color Consistency
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Solution Overview
Problem
Conventional light-emitting modules experience significant color shift due to variations in light emission, affecting their performance in applications like liquid-crystal displays.
Innovation Solution
A light-emitting module design featuring a light-guiding plate with recesses, a wavelength conversion member, a light-transmissive member, and a light-reflective member, which together minimize color shift by optimizing light emission and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light-emitting module structure is used, then the device is simple and easy to manufacture, but significant color shift occurs due to variations in light emission
Solution Approach 1:
The patent applies local quality by creating a recess in the light-guiding plate specifically at the light-emitting element position, and placing a light-reflective member only in that localized area. This targeted modification improves color consistency where it matters most (at the light source) without requiring complex changes to the entire module structure, thus resolving the contradiction between manufacturing simplicity and color precision.
Solution Approach 2:
The patent segments the light-guiding plate by creating a recess that separates the light-emitting element area from the rest of the light guide. This segmentation allows independent optimization of the light emission zone with the reflective member, while the rest of the light guide maintains its simple structure, balancing manufacturing ease with color consistency.
2Manufacturing precision
If a light-reflective member is added to reduce color shift, then color consistency improves, but the device complexity increases
Solution Approach 1:
The patent merges the light-reflective member with the recess structure in the light-guiding plate, creating an integrated solution where the reflective member is positioned within the recess rather than being a completely separate component. This merging reduces assembly complexity while maintaining the color consistency benefit, as the reflective member and recess work together as a unified light management system.
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 module achieves reduced color shift, ensuring consistent and uniform light emission, enhancing the performance of light-emitting modules in display applications.
Implementation Method 1
a wavelength conversion member disposed in the recess of the light-guiding plate
Implementation Method 2
a light-reflective member covering the second main surface of the light-guiding plate and lateral surfaces of the at least one light-emitting element
Data Source
AI summary
A light-emitting module includes: a light-guiding plate having a first main surface serving as a light extracting surface and a second main surface opposite to the first main surface, a recess defined in the second main surface by at least one lateral surface and a base surface; a wavelength conversion member in the recess of the light-guiding plate, the wavelength conversion member having a first surface facing the base surface defining the recess, a second surface opposite to the first surface, and at least one lateral surface between the first surface and the second surface; at least one light-emitting element bonded to the second surface of the wavelength conversion member; a light-transmissive member disposed between the lateral surface defining the recess and the lateral surface of the wavelength conversion member; and a light-reflective member covering the second main surface of the light-guiding plate and lateral surfaces of the light-emitting element.