OLED Pad Unit One-Row Terminal Zone Corrosion
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Solution Overview
Problem
Rapid corrosion of metal wirings in flexible circuit boards of organic light-emitting display devices, particularly around high voltage terminals, leads to signal transmission issues and product failure due to increased connection terminals in a limited space.
Innovation Solution
The organic light-emitting display device features a pad unit with a one-row terminal zone in the high voltage region, where only first row terminals are connected to the display unit, and the second row terminals are removed or not electrically connected, with metal wirings arranged in multiple layers, and an anisotropic conductive layer and pressure-sensitive adhesive layer are used to prevent moisture penetration and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a 2 rows-2 layers connection structure is adopted to increase the number of connection terminals in the pad unit, then the connectivity and signal transmission capability are improved, but the corrosion resistance of metal wirings deteriorates due to rapid corrosion around high voltage terminals
Solution Approach 1:
The pad unit is segmented into a high voltage region and a low voltage region. The high voltage region contains only a single row of terminals (first row terminals), while the low voltage region contains both rows of terminals. This segmentation isolates the corrosive high voltage environment from the second metal wiring, preventing rapid corrosion while maintaining the 2 rows-2 layers connection structure's connectivity benefits.
Solution Approach 2:
Different regions of the pad unit are assigned different terminal configurations based on their functional requirements. The high voltage region uses a one-row terminal zone configuration to prevent corrosion, while the low voltage region uses the full 2 rows configuration for enhanced connectivity. This local differentiation allows each region to optimize for its specific operational conditions.
2Area of stationary object
If multiple rows of terminals are arranged in the pad unit to increase connection density, then the space utilization is improved, but the manufacturing complexity increases due to the need for precise wiring alignment and corrosion protection
Solution Approach 1:
The pad unit is divided into distinct high voltage and low voltage regions with different terminal arrangements. This segmentation simplifies the wiring structure by eliminating the need for second row terminals in the high voltage region, reducing alignment complexity while maintaining high connection density in the low voltage region where both rows are present.
Solution Approach 2:
The solution transitions from a uniform 2D terminal arrangement to a regionally differentiated structure where the high voltage region uses only one row of terminals. This dimensional simplification in the high voltage zone reduces wiring complexity and manufacturing difficulty while the low voltage zone maintains the full 2-row arrangement for space-efficient connectivity.
Data Source
AI summary
Provided are an organic light-emitting display device and a method of manufacturing the same. The organic light-emitting display device includes a panel including a display unit on which an image is formed and a pad unit including a plurality of terminals connected to the display unit and arranged in a plurality of rows on a substrate, and a flexible circuit board including metal wirings arranged in a plurality of layers so as to be respectively connected in correspondence to the plurality of rows of terminals in the pad unit and being coupled to the pad unit, in which the pad unit includes a one-row terminal zone in which only terminals in a single row from among the plurality of rows of terminals electrically connect the metal wirings to the display unit.