Wavelength Conversion Member Layout for Light Crosstalk Suppression
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Solution Overview
Problem
Existing wavelength conversion members face challenges in reducing light propagation between adjacent light-emitting portions, leading to interference and decreased luminous efficiency.
Innovation Solution
A wavelength conversion member with three or more light-emitting portions and two or more light shielding layers, where each light-emitting portion is separated and aligned in a specific direction, and light shielding layers are disposed between adjacent portions to reduce light interference, using a layered structure of light reflecting and light shielding layers to control light propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light shielding layers are added between light-emitting portions, then light propagation between adjacent portions is suppressed, but device complexity increases
Solution Approach 1:
The wavelength conversion member is divided into multiple light-emitting portions (first, second, third light-emitting portions) with light shielding layers positioned between them. This segmentation isolates each light-emitting portion, preventing light from one portion from reaching adjacent portions, thereby suppressing unwanted light propagation while maintaining a structured and organized device layout.
Solution Approach 2:
Light shielding layers are introduced as intermediary elements between adjacent light-emitting portions. These shielding layers act as mediators that block and prevent light from propagating between portions, effectively eliminating the harmful interaction between adjacent light sources without requiring complex reconfiguration of the light-emitting portions themselves.
2Loss of energy
If light-emitting portions are separated to reduce interference, then luminous efficiency improves, but pitch between portions increases
Solution Approach 1:
Light shielding layers are selectively positioned only between adjacent light-emitting portions where interference occurs, rather than uniformly across the entire device. This local application of shielding allows the pitch between light-emitting portions to be minimized in critical areas while maintaining overall compactness, thereby improving luminous efficiency without excessively increasing the overall device footprint.
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 effectively suppresses light propagation between adjacent light-emitting portions, allowing for individual light emission without interference, thereby improving luminous efficiency and reducing the pitch of light-emitting portions.
Implementation Method 1
Each of the two or more light shielding layers is disposed between the two light-emitting portions adjacent to each other
Implementation Method 2
Each of the three or more light-emitting portions has a phosphor
Data Source
AI summary
A wavelength conversion member includes three or more light-emitting portions, and two or more light shielding layers. Each of the three or more light-emitting portions has a phosphor, is separated from each other, and is disposed to be aligned in a first direction. Each of the two or more light shielding layers is disposed between the two light-emitting portions adjacent to each other. The light-emitting portion and the light shielding layer are alternately aligned in the first direction. In the first direction, a length of each of the light-emitting portions is in a range of 0.3 mm to 2.0 mm. An interval in the first direction between the two light-emitting portions adjacent to each other is in a range of 0.1 mm to 2.0 mm.