OLED Light-Emitting Substrate Supports for Uniform Encapsulation
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Solution Overview
Problem
OLED light-emitting devices face issues such as scratching and light diffraction due to insufficient or non-uniform support during encapsulation, leading to light-emitting failures and adverse effects like Newton's rings, which affect display or lighting performance.
Innovation Solution
A light-emitting substrate design featuring a base substrate with arranged light-emitting and non-light-emitting regions, supported by an array of support structures that distribute evenly in non-light-emitting regions and between light-emitting units, preventing deformation of the encapsulation material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encapsulation material is applied without sufficient support structures, then the device structure is simpler, but the light-emitting unit suffers scratching and deformation during encapsulation
Solution Approach 1:
The support structure is segmented into multiple discrete pillars distributed across the substrate. Each pillar is an independent structural element with specific dimensions (height 1-10 micrometers, top surface area 1-100 micrometers squared), providing localized support without requiring a continuous complex framework. This segmentation allows the encapsulation material to be adequately supported while maintaining manufacturing simplicity.
Solution Approach 2:
The support structures are strategically positioned in non-light-emitting regions and between light-emitting units where support is most needed during encapsulation. The pillars have varying heights and top surface areas tailored to local requirements, providing optimal support distribution without uniformly increasing device complexity across the entire substrate.
2Manufacturing precision
If encapsulation material deforms during encapsulation, then the encapsulation process is simpler, but light diffraction and Newton's rings occur affecting display quality
Solution Approach 1:
The support pillars are formed on the substrate before the encapsulation material is applied. This preliminary structural preparation ensures that when the encapsulation material is subsequently deposited, it receives immediate and uniform support, preventing deformation during the encapsulation process. The pre-formed pillars eliminate the need for complex real-time control during encapsulation while achieving high manufacturing precision.
Solution Approach 2:
Multiple support pillars are distributed across the substrate in a regular pattern, creating a replicated support structure that uniformly prevents encapsulation material deformation. This array of identical or similar pillars provides consistent support at multiple locations, ensuring uniform encapsulation quality across the entire device area without requiring complex varied structures.
Data Source
AI summary
The present disclosure provides a light-emitting substrate, a light-emitting apparatus and a lighting apparatus. The light-emitting substrate includes: a base substrate including a plurality of light-emitting regions and a plurality of non-light-emitting regions, where the plurality of light-emitting regions are arranged in an array; a plurality of light-emitting units located in the plurality of light-emitting regions, respectively, where in each light-emitting region, more than one light-emitting unit is arranged in an array; a covering layer covering the light-emitting region and the non-light-emitting region; and a plurality of support structures arranged in an array and evenly distributed in the plurality of non-light-emitting regions and/or between the plurality of light-emitting units, where the support structures are used to support the covering layer.