Flexible Light Shield for LED Crosstalk Reduction
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Solution Overview
Problem
Existing light pipe systems for electronic equipment suffer from substantial crosstalk and light leakage due to the intensity of LEDs, making it difficult to achieve acceptable light alignment and increasing mechanical assembly challenges.
Innovation Solution
A flexible light shield made from a material like silicon is introduced, featuring a set of openings and curved fins that align with the light pipes and LEDs, effectively reducing crosstalk and light leakage by directing light vertically and improving mechanical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light pipes are used to redirect light from circuit board to front face at 90 degrees, then light directionality is improved, but crosstalk between adjacent light pipes increases substantially
Solution Approach 1:
The light shield is divided into multiple discrete fins, with each fin positioned between adjacent light pipes to block crosstalk. This segmentation allows the shield to address crosstalk issues locally between each pair of light pipes while maintaining the overall light redirection function.
Solution Approach 2:
The light shield acts as an intermediary component positioned between the light pipes and the external environment. It mediates the light transmission by allowing vertical light output while blocking lateral crosstalk between adjacent light pipes through its fin structures.
2Illumination intensity
If light pipes are mounted on circuit board, then light redirection is achieved, but light leakage into non-aligned light pipes occurs
Solution Approach 1:
The light shield extracts and blocks the harmful lateral light leakage by introducing fin structures that intercept light attempting to escape into adjacent light pipes. The fins are positioned to capture this leaked light and redirect it vertically, preventing it from entering non-aligned light pipes.
3Manufacturing precision
If high mechanical tolerances are required for light pipe alignment, then light alignment precision is improved, but assembly difficulty increases
Solution Approach 1:
The light shield changes the mechanical parameters of the assembly by providing a flexible mounting structure with inherent compliance. This flexibility allows the shield to accommodate variations in light pipe positioning and mechanical tolerances while maintaining optical alignment, thereby simplifying assembly without sacrificing precision.
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 flexible light shield significantly reduces crosstalk and light leakage, enhancing the directional alignment of light and simplifying the mechanical assembly process by providing a more precise and efficient light distribution system.
Implementation Method 1
A flexible light shield made from a material like silicon is introduced, featuring a set of openings and curved fins that align with the light pipes and LEDs, effectively reducing crosstalk and light leakage by directing light vertically
Implementation Method 2
A flexible light shield made from a material like silicon is introduced, featuring a set of openings and curved fins that align with the light pipes and LEDs, effectively reducing crosstalk and light leakage by directing light vertically
Data Source
AI summary
A flexible light shield for a light pipe.