Segmented Partitioning Member for Uniform Planar Light Output
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Solution Overview
Problem
Thermal shrinkage of the partitioning member in planar light sources leads to luminance non-uniformity, which existing technologies have not adequately addressed.
Innovation Solution
A partitioning member with first and second ridges, each having cuts at intersections, allowing segmentalized shrinkage to reduce thermal stress and maintain light source positioning stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the partitioning member is made as a single continuous structure, then it provides good structural integrity and light reflection, but it undergoes thermal shrinkage under high temperature conditions causing luminance non-uniformity
Solution Approach 1:
The partitioning member is divided into multiple independent partitioned regions by introducing first and second ridges with cuts at their intersections. This segmentation allows each region to shrink independently under thermal stress, preventing the continuous structure from warping and maintaining luminance uniformity across the light source array.
2Stability of the object's composition
If the partitioning member uses a continuous ridge structure, then it maintains structural stability, but it experiences thermal shrinkage that displaces light sources and causes luminance non-uniformity
Solution Approach 1:
The continuous ridge structure is segmented by introducing cuts at the intersections of first and second ridges. This creates independent partitioned regions that can accommodate thermal shrinkage without displacing light sources, thereby maintaining both structural stability and positioning reliability under thermal stress.
3Illumination intensity
If the partitioning member is designed with intersecting ridges forming a grid pattern, then it provides comprehensive light reflection and structural support, but it creates multiple stress concentration points that exacerbate thermal shrinkage effects
Solution Approach 1:
The grid pattern of intersecting ridges is segmented by introducing cuts at the intersection points. This converts the continuous grid into a series of independent partitioned regions, allowing thermal stress to be distributed evenly across multiple small units rather than concentrating at intersection points, thereby reducing overall thermal shrinkage while maintaining light reflection efficiency.
4Productivity
If the partitioning member uses deep wall parts to contain light sources, then it provides good light extraction efficiency, but it increases the overall height and complexity of the device structure
Solution Approach 1:
Instead of increasing wall height vertically to improve light extraction, the invention uses the planar dimension by creating a segmented grid pattern of ridges. This two-dimensional segmentation effectively contains and directs light from multiple angles without requiring excessive vertical height, thereby improving light extraction efficiency while controlling device complexity.
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
Reduces thermal shrinkage and luminance non-uniformity by segmentalizing ridges with cuts, maintaining light direction consistency and enhancing light extraction efficiency.
Implementation Method 1
the reflective member undergoes thermal shrinkage under high temperature conditions to thereby cause luminance non-uniformity
Data Source
AI summary
A planar light source includes a substrate, a plurality of light sources arranged on the substrate, and at least one partitioning member disposed on the substrate. The at least one partitioning member includes: a plurality of first ridges extending in a first direction; a plurality of first wall parts, each first wall part having a predetermined height, at least two sides of each first wall part facing each other; a plurality of partitioned regions, each partitioned region being partitioned by the plurality of first ridges in a plan view, the plurality of partitioned regions arranged in a second direction intersecting the first direction; at least one first cut provided on a corresponding one of the plurality of first ridges; and at least one of the light sources arranged in a corresponding one of the plurality of partitioned regions.