Display Panel Pad Layout for Dual Bonding in High-Resolution Panels
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Solution Overview
Problem
Existing display panels face challenges in electrical connections due to increased requirements for power, signal, and control lines with higher resolutions, leading to issues with pad compatibility and wire bonding processes.
Innovation Solution
The display panel design includes irregularly shaped pads with specific structural features, allowing for both wire bonding and conductive adhesive binding processes, ensuring larger pad widths and reduced space competition, thereby enhancing compatibility with different binding methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of pads is increased to meet higher resolution requirements, then more power and signal lines can be connected, but the pad width decreases and space becomes insufficient
Solution Approach 1:
The pad structure transitions from a simple rectangular shape to an irregular shape with extended portions that protrude toward adjacent pads. This dimensional change allows the pad to occupy more space in the binding area without increasing the overall panel size, effectively increasing pad width and available area while maintaining the required number of pads for high-resolution displays
Solution Approach 2:
The pad is divided into multiple functional portions: a main body portion and one or more extended portions that protrude toward adjacent pads. This segmentation allows different parts of the pad to serve different functions - the main body provides electrical connection while the extended portions optimize space utilization and reduce interference with adjacent pads
2Ease of manufacture
If rectangular pads with equal spacing are used, then the structure is simple and easy to manufacture, but compatibility with different binding processes (wire bonding and conductive adhesive) is poor
Solution Approach 1:
Different portions of the pad structure are designed with different characteristics - the main body portion maintains a standard shape for ease of manufacture, while the extended portions are specifically shaped to accommodate different binding processes. This local differentiation allows the same pad structure to be compatible with both wire bonding and conductive adhesive binding processes
3Device complexity
If pads are arranged in a row with equal spacing, then the layout is regular and simple, but electrical connections become insufficient for high-resolution displays requiring more power and signal lines
Solution Approach 1:
The pad layout evolves from a simple linear row arrangement to an irregular two-dimensional arrangement where pads extend toward each other. This dimensional transformation allows more electrical connections to be established within the same linear space, effectively increasing connection capacity without significantly increasing layout complexity
Data Source
AI summary
The present disclosure provides a display panel (PNL) and a display device. The display panel (PNL) comprises a display area (AA) and a binding area (BB) located on one side of the display area (AA); wherein, in the binding area (BB), there are multiple pads (PAD) arranged in sequence along a first direction DH; wherein, the multiple pads (PAD) comprise at least multiple first pads (PA) and multiple second pads (PB); each of the first pads (PA) comprises a first connection portion (PAY) and a first structure (PAX) located on one side of the first connection portion (PAY) near the display area (AA), a maximum width of the first structure (PAX) is greater than that of the first connection portion (PAY). The first structure (PAX) is located on one side of the second pad (PB) near the display area (AA).