Light Guide Member Hole Depth Segmentation for LCD Backlight Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light-emitting modules have limitations in light extraction efficiency, which affects their performance in applications such as liquid crystal display backlights.
Innovation Solution
The design incorporates a light guide member with specific hole configurations, including a first hole portion and aligned second and third hole portions with varying depths and lengths, to enhance light extraction efficiency by increasing the surface area and optimizing light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light guide member with simple hole structure is used, then the device complexity is low, but the light extraction efficiency is insufficient
Solution Approach 1:
The light guide member is segmented into multiple hole portions (first, second, and third hole portions) with different depths and orientations. This segmentation allows each hole portion to extract light at different positions and angles, collectively improving overall light extraction efficiency while maintaining a structured but not excessively complex design
Solution Approach 2:
The invention introduces depth as an additional dimension by creating hole portions at different depths within the light guide member. The first hole portion is shallower while the second and third hole portions are deeper, enabling light extraction from multiple depth levels and enhancing overall extraction efficiency without simply increasing surface area
2Loss of energy
If the hole portions are made deeper to improve light extraction, then more light can be extracted, but the manufacturing precision requirements increase
Solution Approach 1:
Different hole portions are designed with different depths tailored to their specific functions and positions. The first hole portion is shallower while the second and third hole portions are deeper, allowing each region to be optimized for its specific light extraction needs rather than requiring uniform high-precision deep holes throughout
Solution Approach 2:
The hole portions exhibit asymmetric depth characteristics, with the first hole portion being shallower than the second and third hole portions. This asymmetric design allows for differentiated light extraction at various depths and positions, improving overall efficiency while potentially simplifying manufacturing by not requiring all holes to be uniformly deep
Data Source
AI summary
A light-emitting module includes a light source unit, and a light guide member surrounding the light source unit in a plan view and including a first hole portion opening on a side of a first surface of the light guide member and a second hole portion and a third hole portion, the second hole portion and the third hole portion are aligned in a first direction, a depth of the first hole portion from the first surface is shallower than a depth of the second hole portion from the first surface and a depth of the third hole portion from the first surface, and in the plan view, a maximum length of the second hole portion in the first direction is longer than a maximum length of the second hole portion in a second direction orthogonal to the first direction.