Inclined Power Supply Terminal Electrodes for OLED Display Alignment
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Solution Overview
Problem
Conventional OLED display devices face issues with non-uniform pressure bonding of power supply terminal electrodes, leading to discrepancies in current supply, resulting in luminance gaps and decreased display quality due to the complexity of existing mounting structures.
Innovation Solution
A display device structure featuring a substrate with a TFT layer, light-emitting elements, and a sealing layer, where the power supply terminal electrodes on the frame area are inclined to ensure precise connection with the flexible printed board, reducing pressure bonding area discrepancies without the need for guide members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If guide members are added to prevent electrode displacement during pressure bonding, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies asymmetry by making the power supply terminal electrodes extend in different directions - the first power supply terminal electrode extends in a first direction while the second power supply terminal electrode extends in a second direction that is different from the first direction. This asymmetric arrangement inherently guides the pressure bonding process and prevents displacement without requiring additional guide members, thus resolving the contradiction between manufacturing precision and device complexity
2Ease of manufacture
If pressure bonding is used to connect terminal electrodes, then ease of manufacture is improved, but manufacturing precision deteriorates due to non-uniform bonding areas
Solution Approach 1:
The patent applies local quality by designing different electrode configurations for different locations - the first power supply terminal electrode has a first line width and extends in a first direction, while the second power supply terminal electrode has a second line width and extends in a second direction. This localized differentiation ensures uniform pressure bonding areas across different terminal connections, maintaining manufacturing precision while using the simple pressure bonding process
3Manufacturing precision
If power supply terminal electrodes are connected with high precision, then display quality is improved, but device complexity increases due to inclined electrode structures
Solution Approach 1:
The patent uses asymmetry where the first power supply terminal electrode extends in a first direction and the second power supply terminal electrode extends in a second direction different from the first direction. This asymmetric design inherently provides alignment guidance and ensures high-precision connection without requiring additional guide members or complex mounting structures, thus improving display quality without significantly increasing device complexity
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 structure enables high-precision connection of power supply terminal electrodes, minimizing luminance gaps and maintaining display quality by reducing pressure bonding area variations, thus simplifying the mounting process.
Implementation Method 1
The flexible printed board is connected to a terminal portion of a frame area around the display area by pressure bonding using, for example, conductive paste. This particular bonding establishes electrical connections between the power supply terminal electrodes on the terminal portion and the power supply terminal electrodes on the flexible printed board via the conductive paste.
Data Source
AI summary
A display device includes first power supply terminal electrodes and second power supply terminal electrodes. The first power supply terminal electrodes in a first terminal portion of a frame area at least partially overlap, in a plan view, at least a part of the second power supply terminal electrodes in a second terminal portion of a flexible printed board. The second power supply terminal electrodes are electrically connected to the first power supply terminal electrodes. Either the first power supply terminal electrodes or the second power supply terminal electrodes are inclined from the others.