OLED Display Sealing Layout to Prevent Curing-Induced Circuit Defects
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Solution Overview
Problem
The existing organic light emitting display apparatuses face defects in circuit elements during the curing process of the sealing member, which can lead to non-functional areas and reduced display efficiency due to the vulnerability of organic light emitting diodes to moisture and oxygen.
Innovation Solution
The organic light emitting display apparatus incorporates a sealing member positioned between the circuit element layer and the encapsulation layer, overlapping with auxiliary power supply and voltage patterns, which are made of materials with higher melting points than the power supply lines, to prevent defects during the curing process and reduce the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is positioned to cover circuit elements for better sealing, then moisture and oxygen protection is improved, but the circuit elements may become defective during curing
Solution Approach 1:
The auxiliary power supply pattern acts as a protective intermediary layer that allows the sealing member to be positioned over circuit elements for enhanced sealing while preventing the curing process from damaging those elements. The auxiliary pattern absorbs or shields the harmful effects during curing.
2Area of stationary object
If the non-display area is reduced to increase display area, then display efficiency is improved, but the sealing member may overlap with more circuit elements causing defects
Solution Approach 1:
The auxiliary power supply pattern serves as a protective intermediary that enables the sealing member to extend into areas with circuit elements without causing damage. This allows the non-display area to be minimized while maintaining circuit element functionality through the protective auxiliary pattern.
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 configuration effectively prevents circuit elements from becoming defective during the sealing process, thereby minimizing non-display areas and enhancing the overall display efficiency by ensuring the integrity of the organic light emitting diodes.
Implementation Method 1
auxiliary power supply and voltage patterns, which are made of materials with higher melting points than the power supply lines, to prevent defects during the curing process
Data Source
AI summary
An organic light emitting display apparatus includes a base layer, a circuit element layer, a display element layer, an encapsulation layer, and a sealing member. The circuit element layer includes a power supply line on the base layer and an auxiliary power supply pattern on and connected to the power supply line. The display element layer includes a first electrode, a light emitting layer, and a second electrode, which are sequentially stacked on the circuit element layer. The second electrode is electrically connected to the auxiliary power supply pattern. The sealing member is between the circuit element layer and the encapsulation layer to overlap with the auxiliary power supply pattern when viewed in a plan view.