OLED Sealing Layout With Auxiliary Power Pattern Heat Shielding
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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 a sealing member is disposed on an exterior of the organic light emitting display apparatus to seal the organic light emitting diode, then the organic light emitting diode is protected from moisture and oxygen, but circuit elements around the sealing member become defective during the curing process
Solution Approach 1:
An auxiliary power supply pattern is introduced as an intermediary element between the sealing member and the power supply line. This auxiliary pattern acts as a heat sink that absorbs excess heat from the curing process, preventing thermal damage to the circuit elements while still allowing the sealing member to protect the OLED from moisture and oxygen.
Solution Approach 2:
The patent changes the thermal parameters of the system by introducing an auxiliary power supply pattern with specific thermal properties. This auxiliary pattern has higher thermal conductivity or heat capacity than the original power supply line, allowing it to absorb and dissipate heat more effectively during the curing process, thereby preventing thermal damage to circuit elements.
2Ease of manufacture
If the sealing member is formed by placing a curable material between substrates and curing it, then the sealing member is created to protect the organic light emitting diode, but circuit elements around the sealing member become defective during the curing process
Solution Approach 1:
The auxiliary power supply pattern is formed in advance during the manufacturing process, before the curing of the sealing member. This preliminary structure is strategically positioned to provide thermal protection to circuit elements that will be exposed during the subsequent curing process, ensuring their survival without requiring process changes.
3Productivity
If the non-display area is reduced, then the display efficiency is enhanced, but the sealing member may cause defects in circuit elements during the curing process
Solution Approach 1:
The auxiliary power supply pattern is strategically positioned only in the regions where circuit elements are located and where the sealing member overlaps with them. This localized approach provides thermal protection precisely where needed without adding unnecessary structures in other areas, thus minimizing the impact on display area and maintaining high display efficiency.
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, minimizing non-display areas and enhancing the overall display efficiency by ensuring the organic light emitting diodes are protected from moisture and oxygen.
Implementation Method 1
The auxiliary power supply pattern is on the power supply line, overlapped with the power supply line, and connected to the power supply line. The auxiliary voltage pattern is above the voltage supply line, overlapped with the voltage supply line, and connected to the voltage supply line.
Implementation Method 2
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.