Micro-LED Display Module Edge Structure for Light Leakage Control

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Solution Overview

Problem

Existing display technologies face issues such as slow response time, high power consumption, and screen burn-in, particularly in liquid crystal panels, while micro-LED panels offer better contrast, response times, and energy efficiency but can suffer from light leakage between modules.

Innovation Solution

A display module design incorporating a substrate with mounted inorganic light emitting devices, a front cover, side cover, and light absorbing end member to prevent light leakage, along with a metal plate and ground member for improved heat dissipation and conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If multiple display modules are arranged to form a large screen, then the screen size and resolution are improved, but light leakage occurs at the seams between modules

Engineering Contradiction:

Improvescreen sizeVSAvoidlight leakage

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

A light absorbing member is introduced as an intermediary component between adjacent display modules. This member includes a light absorbing body that blocks light from escaping through the side ends of front covers, and a grounding body that provides electrical connection. The light absorbing member effectively mediates the light leakage problem at module seams while maintaining the modular structure for large screen assembly.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The light absorbing member is strategically positioned only at the critical regions where light leakage occurs - specifically at the side ends of front covers where modules join. The grounding body is positioned to provide localized electrical connection. This targeted approach addresses the light leakage issue at specific locations without requiring modification of the entire display module structure.

Inventive Principle:

Principle #3Local quality

2Speed

If inorganic light emitting devices are mounted on substrates to form micro-LED panels, then response time and energy efficiency are improved, but heat dissipation becomes a challenge

Engineering Contradiction:

Improveresponse timeVSAvoidheat dissipation

Core Design Contradiction:

SpeedVSTemperature

Solution Approach 1:

The grounding body of the light absorbing member serves as an intermediary heat dissipation pathway. It provides electrical grounding while simultaneously conducting heat away from the inorganic light emitting devices through thermal conduction, addressing both electrical and thermal management needs.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The light absorbing member performs multiple functions: it absorbs stray light to prevent leakage, provides electrical grounding through the grounding body, and facilitates heat dissipation from the inorganic light emitting devices. This multi-functional component addresses several challenges simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enhances display performance by preventing light leakage and improving heat dissipation, resulting in better contrast, energy efficiency, and durability, suitable for large screens and various resolutions.

Implementation Method 1

a light absorbing end member covering the side end of the front cover and configured to prevent light, emitted from the plurality of inorganic light emitting devices, from passing through the side end of the front cover

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

a side cover covering the side surface of the substrate and bonded to a lower surface of the front cover

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

a ground member covering at least a portion of a side end of the side cover and in contact with the metal plate so as to be grounded with the metal plate

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12501754B2Display apparatus including display module and manufacturing method thereof

Publication Date: 2025.12.16 SAMSUNG ELECTRONICS CO LTD

AI summary

A display module is provided. The display module includes a substrate including a mounting surface, on which a plurality of inorganic light emitting devices is mounted, and a side surface; a front cover covering the mounting surface and including a side end that is in a region outwards from the mounting surface; a side cover covering the side surface of the substrate and bonded to a lower surface of the front cover, corresponding to the region outwards from the mounting surface, and the side surface of the substrate; and a light absorbing end member covering the side end of the front cover and configured to prevent light, emitted from the plurality of inorganic light emitting devices, from passing through the side end of the front cover.