Module-Hole Display Structure for Electrode Deposition and Adhesion
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Solution Overview
Problem
Existing display apparatuses face challenges in preventing performance deterioration of electronic modules disposed in module holes, particularly due to issues with light reflection and adhesion of electrodes and sealing members.
Innovation Solution
The display apparatus incorporates a deposition preventing pattern, such as ABH113, which is positioned on the same layer as the second electrode but does not overlap with it, and is thicker, to prevent electrode deposition in the module hole area, while ensuring the sealing member adheres firmly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second electrode is deposited in the module hole area to improve electrical connection, then electrical conductivity is improved, but light reflection increases and adhesion deteriorates
Solution Approach 1:
The patent applies different properties to different areas: the deposition preventing pattern (made of organic emission material) is placed only in the module hole area, while the second electrode is deposited in the active area. This local differentiation allows the electrode to provide electrical connection where needed while preventing light reflection and adhesion issues in the module hole area.
2Reliability
If the second electrode is deposited in the module hole area to improve electrical connection, then electrical conductivity is improved, but adhesion of sealing member deteriorates
Solution Approach 1:
The deposition preventing pattern is locally applied in the module hole area to prevent electrode deposition, ensuring that the sealing member can adhere properly to the substrate in this region. The second electrode is still deposited in the active area where electrical connection is required, maintaining the adhesion strength where the sealing member needs to bond.
3Object-affected harmful factors
If a deposition preventing pattern is introduced to prevent electrode deposition in the module hole area, then light reflection and adhesion issues are resolved, but device complexity increases
Solution Approach 1:
The deposition preventing pattern serves multiple functions: it prevents electrode material deposition in the module hole area, acts as an adhesive promoter for the sealing member, and reduces light reflection. By combining these functions into a single pattern layer, the patent avoids adding excessive structural complexity while achieving multiple benefits.
4Reliability
If the deposition preventing pattern is made thicker to improve prevention of electrode deposition, then deposition prevention is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a thickness range of 50-200 nm for the deposition preventing pattern, which is thicker than conventional electrode layers. This parameter change ensures effective prevention of electrode deposition while maintaining manufacturability through standard deposition processes.
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 enhances the performance of electronic modules by reducing light reflection and improving adhesion, thereby maintaining the functionality and reliability of the display apparatus.
Implementation Method 1
a deposition preventing pattern; and a light emitting element including: a first electrode connected to the thin film transistor; an emission pattern on the first electrode; and a second electrode on the emission pattern; The second electrode and the deposition preventing pattern are at a same layer and do not overlap with each other
Data Source
AI summary
A display apparatus includes: a base substrate having a front surface, a rear surface opposite to the front surface, a module hole extending through the front surface and the rear surface, an active area, a peripheral area adjacent to the active area, and a margin area adjacent to the module hole; a circuit layer on the base substrate, the circuit layer including a driving element including a thin film transistor; a display element layer including: a deposition preventing pattern; and a light emitting element including: a first electrode connected to the thin film transistor; an emission pattern on the first electrode; and a second electrode disposed on the emission pattern. An encapsulation layer is on the display element layer, and encapsulating the light emitting element. The second electrode and the deposition preventing pattern are at a same layer and do not overlap with each other.