Transparent Display Anode Gas Discharge Passages
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Solution Overview
Problem
In light emitting display devices, residual moisture in the organic layer on the front surface of optical elements can cause step differences, leading to reduced light transmittance and performance issues for optical elements like cameras or sensors.
Innovation Solution
A light emitting display device design that includes a transparent display area with an anode having an opening, where the opening is used as a gas discharge passage to remove residual moisture, and light blocking parts with varying heights to prevent step differences and enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the organic layer is formed continuously over the optical element surface, then the layer integrity is maintained, but residual moisture remains trapped causing step differences
Solution Approach 1:
The patent introduces openings in the inorganic encapsulation layer to segment the continuous structure, creating discrete gas discharge passages that allow residual moisture to escape from specific regions without compromising the overall integrity of the organic layer
Solution Approach 2:
The patent performs preliminary action by forming the openings in the inorganic encapsulation layer before final encapsulation is complete, allowing residual moisture to be discharged through these pre-formed passages during subsequent drying or curing processes, preventing step differences from developing
2Manufacturing precision
If light blocking parts are added to prevent step differences, then surface flatness improves, but device complexity increases
Solution Approach 1:
The patent merges the light blocking function with the encapsulation structure by forming light blocking parts from the same inorganic encapsulation material, eliminating the need for separate light blocking layers and reducing overall device complexity
Solution Approach 2:
The inorganic encapsulation layer serves multiple functions simultaneously: it provides moisture barrier protection, creates gas discharge passages through openings, and forms light blocking parts to prevent step differences, demonstrating multi-functionality that reduces device complexity
3Productivity
If the opening area in the anode is increased to improve moisture discharge, then gas discharge efficiency improves, but light transmittance decreases
Solution Approach 1:
The patent applies local quality by concentrating the opening area in specific local regions of the inorganic encapsulation layer rather than distributing it uniformly, allowing efficient moisture discharge from critical areas while maintaining light transmittance in other regions
Solution Approach 2:
The patent uses partial action by providing just enough opening area (5-20% of total anode area) to achieve effective moisture discharge without excessive opening size that would compromise light transmittance, finding the optimal balance between the two requirements
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
Proper removal of residual moisture through the gas discharge passage improves light transmittance and prevents step differences in the organic layer, enhancing the performance of optical elements.
Implementation Method 1
residual moisture in the organic layer on the front surface of optical elements
Implementation Method 2
the opening is used as a gas discharge passage to remove residual moisture
Implementation Method 3
light blocking parts with varying heights to prevent step differences and enhance light transmittance
Data Source
AI summary
The present disclosure relates to a light emitting display device that includes a transparent display area including a light transmission area and a normal display area, wherein the transparent display area includes: an anode including an opening; a first light blocking part filling the opening; and a second light blocking part positioned along an exterior side of the anode. A height of a highest part of the first light blocking part is different than a height of a highest part of the second light blocking part.