Micro-LED Display Module Sealing for Moisture and ESD Protection
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Solution Overview
Problem
Existing display apparatuses face challenges such as slow response time, high power consumption, and susceptibility to burn-in issues, particularly in liquid crystal panels and OLED panels.
Innovation Solution
A display module and apparatus utilizing a substrate with a thin-film transistor (TFT) layer, mounted with inorganic light-emitting elements, and protected by an anisotropic conductive layer, front cover, side cover, and metal plate, which enhances electrostatic discharge protection and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a liquid crystal panel is used, then it can display information visually, but it has slow response time and high power consumption
Solution Approach 1:
The patent extracts the backlight unit from the display structure, using self-emissive micro-LEDs instead. This eliminates the need for external light sources and complex liquid crystal switching mechanisms, directly achieving fast response times and low power consumption through the inherent properties of inorganic light-emitting diodes
Solution Approach 2:
The patent replaces the mechanical liquid crystal rotation system with inorganic LED light emission. The micro-LEDs directly convert electrical energy to light through electroluminescence, eliminating the need for liquid crystal molecular reorientation and backlight modulation, thereby achieving superior response speed and energy efficiency
2Length of moving object
If an OLED panel is used, then it can be made thin without backlight, but it is susceptible to burn-in phenomenon
Solution Approach 1:
The patent uses inorganic micro-LEDs which, while having similar thin-form-factor capabilities to OLEDs, provide significantly longer operational lifetimes and resistance to burn-in. The inorganic semiconductor materials maintain stable light emission characteristics over extended periods without the degradation issues that plague organic compounds
Solution Approach 2:
The patent employs inorganic semiconductor materials for the light-emitting elements, combining the thin-form-factor advantage of self-emissive displays with the superior stability and longevity of inorganic compounds. This composite approach integrates micro-LEDs with substrate and encapsulation structures to achieve both thickness reduction and burn-in resistance
3Reliability
If the anisotropic conductive layer extends outside the mounting surface, then electrostatic discharge protection is improved, but the device complexity increases
Solution Approach 1:
The anisotropic conductive layer serves multiple functions: it provides electrical connection between the TFT layer and light-emitting elements, offers electrostatic discharge protection when extending beyond the mounting surface, and maintains structural integrity. This multi-functional design achieves enhanced ESD protection without proportionally increasing device complexity
Solution Approach 2:
The anisotropic conductive layer is implemented as a thin film that can be extended beyond the mounting surface area. This flexible film approach allows ESD protection to cover a larger area without adding significant bulk or complexity, as the conductive layer conforms to the substrate structure
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 provides improved reliability against external solutions and electrostatic discharge, while also offering better contrast, response times, and energy efficiency compared to traditional display technologies.
Implementation Method 1
an anisotropic conductive layer on an upper surface of the thin-film transistor layer and configured to electrically connect the thin-film transistor layer to the plurality of inorganic light-emitting elements
Implementation Method 2
a plurality of inorganic light-emitting elements mounted on the mounting surface
Data Source
AI summary
A display module includes: a substrate including a mounting surface having a thin-film transistor (TFT) layer is formed thereon, a side surface, and a rear surface opposite to the mounting surface; a plurality of inorganic light-emitting elements mounted on the mounting surface; an anisotropic conductive layer on the TFT layer and configured to electrically connect the TFT layer with the plurality of inorganic light-emitting elements; a front cover for covering the mounting surface; a side cover for surrounding the side surface; and a metal plate adhered to the rear surface. A side end of the front cover extends to a region outside the mounting surface. The side cover is made of a moisture-proof material for preventing moisture from permeating, and extends to at least a part of a side surface of the metal plate from a lower portion of the front cover corresponding to the region outside the mounting surface.