Undulating Lens Structure for Display Panel Adhesion and Light Extraction
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Solution Overview
Problem
Display apparatuses with optical adjustment layers suffer from issues such as bubbles, cracks, and low reliability due to the fall-off of film structures with different refractive indexes, leading to reduced light emitting efficiency and shortened product life.
Innovation Solution
A display panel design featuring a light emitting device layer, an encapsulation layer, and an optical adjustment layer with a first lens structure having an undulating morphology and a planarization layer, which improves adhesion and reduces the likelihood of film fall-off, thereby enhancing light emitting efficiency and product reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an optical adjustment layer is disposed in the optical path region to adjust the incident angle of light and reduce total internal reflection, then light emitting efficiency is improved, but the product is prone to bubbles, cracks, and film fall-off, reducing reliability
Solution Approach 1:
The patent applies curvature by forming an undulating morphology on the surface of the first lens structure. This curved surface design enables effective light extraction by reducing total internal reflection, while the gradual undulating structure maintains good adhesion with the planarization layer, preventing film fall-off and improving overall product reliability.
2Loss of energy
If film structures with different refractive indexes are stacked to form an optical adjustment layer, then light emitting efficiency is improved, but adhesion between layers deteriorates, causing film fall-off
Solution Approach 1:
The undulating morphology creates a curved interface between the first lens structure and the planarization layer. This curved surface increases the contact area and mechanical interlocking between layers with different refractive indexes, significantly improving adhesion strength while maintaining the optical adjustment function.
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 proposed solution effectively reduces the probability of total internal reflection, improves light emitting efficiency, and enhances the reliability and longevity of the display apparatus by improving the adhesion between the first lens structure and the planarization layer.
Implementation Method 1
improving the adhesion between the first lens structure and the planarization layer
Implementation Method 2
When an incident angle of light on a critical surface between the inner and outer optical path regions of the display apparatus reaches or exceeds the critical angle of total reflection, total internal reflection will occur
Implementation Method 3
an optical adjustment layer can be disposed in the optical path region of the display apparatus to adjust the incident angle of light
Data Source
AI summary
A display panel, a manufacturing method therefor, and a display apparatus. The display panel (100) comprises a light-emitting device layer (110), an encapsulation layer (120) and an optical regulation layer (130), which are successively stacked, the optical regulation layer (130) comprising first lens structures (131) located on the side of the encapsulation layer away from the light-emitting device layer, and a planarization layer (132) located on the sides of the first lens structures away from the light-emitting device layer, and on the exposed side of the encapsulation layer away from the light-emitting device layer, the surfaces of the sides of at least part of the first lens structures (131) away from the light-emitting device layer (110) having relief appearances.