Partitioned Micro LED Substrate for Uniform Backlight Emission
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Solution Overview
Problem
Current display technologies face challenges in achieving uniform light distribution and reducing light crosstalk between micro LEDs, leading to suboptimal display performance and visual experience.
Innovation Solution
A light emitting substrate with a retaining wall that defines partitions on a base substrate, where each partition contains at least one micro LED, and a light transmission protection layer with concave structures to manage light emission and reduce crosstalk, combined with a reflective layer and additional films for enhanced light utilization and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Micro LED backlights are used, then productivity and manufacturing efficiency are improved, but light crosstalk and halo effects increase leading to non-uniform light distribution
Solution Approach 1:
The base substrate is divided into multiple independent partitions by retaining walls, with each partition containing a single Micro LED. This segmentation physically isolates adjacent LEDs, preventing light crosstalk while maintaining the high-density arrangement that enables manufacturing efficiency.
Solution Approach 2:
A light transmission protection layer with concave structures serves as an intermediary between the Micro LEDs and the external environment. The concave structures act as light guides that direct and uniformize light output, reducing halo effects and improving overall light distribution uniformity.
2Object-generated harmful factors
If retaining walls are added to partition LEDs, then light crosstalk is reduced, but device complexity increases
Solution Approach 1:
The retaining walls create a modular partitioned structure that systematically organizes LEDs into isolated cells. This segmentation approach reduces light crosstalk while maintaining manufacturing simplicity through standardized partition designs.
Solution Approach 2:
The light transmission protection layer with concave structures serves multiple functions simultaneously: it protects the LEDs, transmits light uniformly, and reduces halo effects. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Ease of manufacture
If conventional backlight structures are used, then manufacturing is simpler, but light utilization is insufficient and uniformity is poor
Solution Approach 1:
The concave structures in the light transmission protection layer utilize curved surfaces to redirect and distribute light more uniformly. The curved geometry efficiently captures and redirects light that would otherwise be lost, improving light utilization while maintaining manufacturing feasibility through standard molding techniques.
Solution Approach 2:
The invention optimizes parameters such as the depth, width, and spacing of the concave structures in the light transmission protection layer to maximize light utilization and uniformity. These parameter adjustments are achieved through conventional manufacturing processes, balancing performance improvement with ease of manufacture.
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 reduces light crosstalk, achieves better uniform light distribution, and enhances the visual experience by improving picture contrast to levels comparable to OLED displays while maintaining the advantages of LCD technology.
Implementation Method 1
a material of the retaining wall includes a reflective material
Implementation Method 2
a light transmission protection layer covering the multiple light emitting diodes
Data Source
AI summary
A light emitting substrate, comprising a base substrate, a retaining wall disposed on the base substrate, and a plurality of light emitting diodes. The retaining wall defines a plurality of partitions on the base substrate, and at least one light emitting diode is provided in at least one partition.