Light-Emitting Module Layout for Heat Dissipation and Color Uniformity
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Solution Overview
Problem
Existing light-emitting modules for display apparatuses have poor reliability due to inadequate mechanical protection and heat dissipation, leading to suboptimal performance and lifespan.
Innovation Solution
A light-emitting module comprising multiple light-emitting elements with different wavelengths, arranged in a centrosymmetric pattern, with a wiring layer and conductive pad configuration that ensures electrical connectivity and mechanical protection, enhancing reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-emitting modules are encapsulated to mechanically protect LEDs, then mechanical protection and heat dissipation are improved, but manufacturing complexity increases
Solution Approach 1:
The light-emitting module is divided into multiple pixel units, each containing multiple light-emitting elements arranged in a specific pattern. This segmentation allows for simplified manufacturing of individual units that can be assembled into larger modules, reducing overall manufacturing complexity while maintaining mechanical protection and heat dissipation effectiveness.
Solution Approach 2:
The patent employs a nested structure where pixel units are arranged in groups, with wiring layers and conductive pads integrated within the encapsulation structure. The wiring layer is positioned between the light-emitting elements and the encapsulation layer, creating a nested arrangement that simplifies the overall manufacturing process while ensuring mechanical protection.
2Illumination intensity
If multiple light-emitting elements with different wavelengths are arranged closely, then color distribution and luminous efficacy are improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent implements local quality by creating gaps between adjacent light-emitting elements within pixel units and between different pixel units. These gaps are strategically positioned to facilitate heat dissipation from specific high-heat-generation areas while maintaining close arrangement of elements for optimal color distribution and luminous efficacy.
Solution Approach 2:
The patent addresses heat dissipation by introducing vertical spacing through the encapsulation structure and wiring layer arrangement. The wiring layer is positioned in a intermediate layer between the light-emitting elements and the outer encapsulation, creating a three-dimensional heat dissipation pathway that allows heat to escape in multiple directions rather than being confined to a two-dimensional plane.
3Ease of manufacture
If light-emitting elements are arranged in a non-centrosymmetric pattern, then manufacturing is simpler, but color uniformity and visual performance deteriorate
Solution Approach 1:
The patent employs centrosymmetric arrangement patterns where pixel units are positioned symmetrically around a central point. This symmetric arrangement ensures uniform color distribution and visual performance while maintaining manufacturing simplicity through standardized, repeating unit patterns that can be systematically fabricated.
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 improves the reliability and efficiency of light-emitting modules by ensuring effective heat dissipation, mechanical protection, and consistent color distribution, thereby enhancing the performance and lifespan of display apparatuses.
Implementation Method 1
The light-emitting elements include a first light-emitting element emitting a first wavelength, a second light-emitting element emitting a second wavelength, and a third light-emitting element emitting a third wavelength
Data Source
AI summary
A display apparatus includes a thin-film transistor (TFT) substrate and a light-emitting module arranged on the TFT substrate. The light-emitting module includes multiple light-emitting elements, the light-emitting elements include a first light-emitting element emitting a first wavelength, a second light-emitting element emitting a second wavelength, and a third light-emitting element emitting a third wavelength. A voltage of each light-emitting element is greater than or equal to 3 volts (V) when a rated current is 1 microampere (μA).