OLED Sealant Overlap Detection for Circuit Protection
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Solution Overview
Problem
The adhesion process between substrates in organic light-emitting display apparatuses can damage the circuit pattern due to heat from the sealing process, affecting the reliability and lifespan of the device.
Innovation Solution
Incorporating a detecting unit that overlaps the circuit pattern to detect any damage caused by the sealant, allowing for precise calculation of the sealant's overlap range without harming the circuit, and using a sealant that overlaps the circuit pattern to enhance adhesive strength between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sealant overlaps the circuit pattern to enhance adhesive strength between substrates, then the adhesion degree improves, but the circuit pattern may be damaged by heat from the sealing process
Solution Approach 1:
The patent divides the sealing structure into two distinct parts: a sealant that overlaps the circuit pattern to provide adhesion, and a protective layer that covers the circuit pattern to shield it from heat damage. This segmentation allows each component to fulfill its specific function without compromising the other.
Solution Approach 2:
The protective layer acts as an intermediary between the sealant and the circuit pattern. It mediates the interaction by blocking heat transfer from the sealant to the circuit pattern, thereby protecting the circuit while allowing the sealant to maintain its adhesive function.
2Strength
If the sealant is applied to adhere the upper and lower substrates, then the adhesion degree improves, but the lifespan and reliability become dependent on adhesion quality
Solution Approach 1:
The protective layer is applied beforehand to cushion the circuit pattern against potential heat damage during the sealing process. This preventive measure ensures that even if the sealant generates excessive heat, the circuit pattern remains protected, thereby extending the device lifespan.
Solution Approach 2:
The sealing structure employs composite materials consisting of the sealant and the protective layer. The sealant provides adhesion through its adhesive properties, while the protective layer provides thermal protection. This composite structure combines the benefits of both materials to achieve both strong adhesion and long lifespan.
3Measurement precision
If the detecting unit overlaps the circuit pattern to detect damage, then the detection capability improves, but the device complexity increases
Solution Approach 1:
The protective layer serves multiple functions: it protects the circuit pattern from heat damage during sealing and simultaneously acts as a detecting unit that overlaps the circuit pattern to detect any damage. This multi-functionality reduces the need for separate detection components, thereby minimizing device complexity.
Solution Approach 2:
The patent merges the protective function and the detection function into a single integrated structure. The protective layer is designed to both shield the circuit pattern and detect damage through its overlap with the circuit pattern, combining two functions that could otherwise require separate components.
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
Improves the operational reliability of the organic light-emitting display apparatus by ensuring the sealant's adhesive strength without damaging the circuit pattern, thereby extending the device's lifespan.
Implementation Method 1
a sealant between the first substrate and the second substrate, the sealant adhering the first substrate to the second substrate
Data Source
AI summary
An organic light-emitting display apparatus includes a first substrate, a display unit that defines an active area on the first substrate, a second substrate on the display unit, a circuit pattern on outer sides of the active area on the first substrate, a sealant between the first substrate and the second substrate, the sealant adhering the first substrate to the second substrate and overlapping at least a part of the circuit pattern, and a detecting unit that overlaps the at least a part of the circuit pattern and detects whether the circuit pattern is damaged.