Lamp Plate Geometry for Uniform M-LED Display Luminance
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Solution Overview
Problem
Mini/Micro-Light-emitting Diode (M-LED) technology suffers from poor luminance uniformity due to stronger light emission directly from the center of the M-LED chips, weaker emission from the periphery, resulting in dark spots and cross-shaped dark bands, leading to poor display quality.
Innovation Solution
A lamp plate design with luminance partitions shaped as regular polygons, where light-emitting units are arranged at vertices, and luminance combination regions have equal distances between centers, enhancing light mixing and reducing dark bands through specific geometric arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rectangular light-emitting partitions are arranged sequentially in row and column directions, then the lamp plate structure is simple and easy to manufacture, but the luminance uniformity deteriorates due to dark spots at centers and cross-shaped dark bands
Solution Approach 1:
The patent transforms the traditional rectangular light-emitting partitions into regular triangular partitions, changing the geometric symmetry from rectangular to triangular. This asymmetric transformation eliminates the cross-shaped dark bands caused by rectangular arrangement while maintaining manufacturing feasibility through standardized triangular component production.
Solution Approach 2:
The patent introduces a new spatial arrangement dimension by configuring triangular partitions in a specific geometric pattern where three triangular partitions surround each light-emitting unit. This dimensional reorganization optimizes light distribution paths and eliminates the dark spot formation inherent in sequential rectangular arrangements.
2Device complexity
If M-LED chips are disposed at vertices of rectangular light-emitting partitions, then the light-emitting structure is compact, but dark spots appear at centers due to stronger central emission and weaker peripheral emission
Solution Approach 1:
The patent replaces rectangular partitions with triangular partitions, fundamentally changing the geometric symmetry. This transformation repositions the light-emitting units relative to the partition geometry, eliminating the central dark spot problem caused by rectangular vertex arrangements while maintaining structural compactness.
Solution Approach 2:
The patent optimizes the local arrangement of light-emitting units around each triangular partition, positioning them at specific vertices to achieve uniform light distribution. This local optimization ensures that each triangular partition contributes evenly to the overall luminance, preventing dark spot formation.
3Shape
If rectangular light-emitting partitions are used, then the partition shape is simple, but the light mixing effect deteriorates due to unequal distances between adjacent partition centers
Solution Approach 1:
The patent adopts regular triangular partitions instead of rectangular ones, creating a symmetric triangular lattice structure. This geometric transformation ensures equal distances between adjacent partition centers, optimizing light mixing while maintaining shape simplicity through standardized triangular geometry.
Data Source
AI summary
A lamp plate and a display panel, a luminance combination region in the lamp plate includes a first luminance partition and multiple second luminance partitions surrounding and sharing edges with the first luminance partition, a center of the first luminance partition is defined as a first center, and the centers of the second luminance partitions are defined as second centers, and in one luminance combination region, distances between each one of the second centers and the first center are equal.