Staggered Display Panel Pad Layout for Reliable Wire Bonding
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Solution Overview
Problem
Existing display devices face challenges with connection failures of wires connected to the display panel, which can lead to performance issues and reliability problems.
Innovation Solution
The display device incorporates a design where first panel pads are arranged in a specific pattern with exposed areas between rows, and wires are connected to these pads with a loop-shaped connection portion, ensuring secure attachment and preventing connection failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are directly connected to panel pads in a conventional grid arrangement, then the device complexity is reduced, but connection failures occur due to insufficient exposure and bonding area
Solution Approach 1:
The panel pads are divided into multiple rows with alternating exposure patterns. First panel pads in odd rows are exposed while second panel pads in even rows are exposed, creating a segmented arrangement that allows wires to access bonding portions without obstruction from adjacent pads, thereby improving connection reliability
Solution Approach 2:
The pad arrangement transitions from a simple two-dimensional grid to a staggered three-dimensional configuration where pads in alternating rows are offset. This dimensional change creates exposure spaces between adjacent pads, enabling reliable wire bonding while maintaining a compact overall structure
2Area of stationary object
If the pitch between panel pads is reduced to increase density, then the area is reduced, but connection failures occur due to insufficient bonding area
Solution Approach 1:
By segmenting the pad arrangement into alternating exposed rows, the invention allows reduced pitch between pads while maintaining sufficient bonding area. The staggered configuration ensures that wires bonding to pads in one row are not obstructed by adjacent pads, enabling high-density layouts without compromising connection reliability
Solution Approach 2:
The pad layout is pre-configured with alternating exposure patterns before wire bonding. This preliminary arrangement ensures that bonding portions are adequately exposed and accessible, allowing for reliable connections even when the overall pitch is reduced to increase device density
Data Source
AI summary
There is provided a display device including a display panel including first panel pads arranged along a plurality of rows, each of the rows extending in a first direction in a plan view, wires extending in a second direction crossing the first direction, each of the wires including a first bonding portion attached to a corresponding one of the first panel pads, and a first circuit board including first pads connected to the wires. The first panel pads in a first row of the plurality of rows in a plan view are exposed in the second direction crossing the first direction between the first panel pads in a second row neighboring to the first row of the plurality of rows.