OLED Through Hole Filling for Under-Panel Camera Light Transmission
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Solution Overview
Problem
In organic light emitting diode (OLED) display panels, light incident into a through hole is absorbed by film layers, reducing the amount of light received by the camera, which is a problem in under-panel camera systems where light permeability is crucial.
Innovation Solution
A filling portion with a refractive index greater than the surrounding film layers is used within the through hole, causing total reflection of incident light and increasing the amount of light that reaches the substrate and optical sensor, which includes organic silicon and nanoparticles like Y2O3, CeO2, TiO2, and ZnS, optimizing the refractive index range from 2 to 2.5.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a through hole is created in the OLED display panel for the under-panel camera, then light permeability is improved, but light is absorbed by film layers on the inner wall of the hole reducing the amount of light reaching the camera
Solution Approach 1:
The patent changes the refractive index parameter of the filling material to be greater than the refractive index of the surrounding film layers. This parameter change creates total internal reflection at the interface between the filling portion and film layers, preventing light absorption and improving light transmission to the camera sensor.
Solution Approach 2:
The filling portion acts as an intermediary element within the through hole. By introducing this intermediate material with specific optical properties (higher refractive index), the patent mediates the interaction between light and the film layers, causing total reflection and reducing harmful light absorption while maintaining light permeability.
2Illumination intensity
If the refractive index of the filling portion is increased to reduce light absorption, then light transmission is improved, but the complexity of material selection and preparation increases
Solution Approach 1:
The patent employs composite materials (organic silicon combined with nanoparticles such as Y2O3, CeO2, TiO2, ZnS, or metal oxides) to achieve the required high refractive index. This composite approach allows tuning of optical properties while maintaining practical manufacturability, balancing performance improvement with material selection complexity.
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
This solution enhances light transmission by reducing light absorption in film layers, increasing the amount of light that reaches the optical sensor, thereby improving the imaging effect in OLED display panels with under-panel cameras.
Implementation Method 1
Light being incident with a specific angle to an interface between a filling portion and at least one film layer causes total reflection to reduce light being incident into the film layer
Data Source
AI summary
An organic light emitting diode display panel and an electronic device is provided. Light being incident with a specific angle to an interface between a filling portion and at least one film layer causes total reflection to reduce light being incident into the film layer surrounding the inner wall of the through hole, such that an amount of light after the total reflection reached the substrate and passed through the substrate and received by the optical sensor is increased.