Display Panel Connection Board for Reliable Pad Bonding
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Solution Overview
Problem
The connection reliability between display panels and circuit boards in display devices is not adequately addressed, leading to potential issues with signal transmission and device performance.
Innovation Solution
A display device design that includes a connection board with spaced-apart connection lines, where each connection line has a first end portion directly contacting a panel pad on the display panel and a second end portion contacting a board pad on the circuit board, using materials like copper and tin, and employing ultrasonic vibration to form a direct bond between the panel pads and connection lines for enhanced contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connection methods are used between display panel and circuit board, then the device structure is simple, but the connection reliability is insufficient
Solution Approach 1:
The connection structure is segmented into multiple independent connection lines spaced apart from each other on the connection board. Each connection line independently connects a panel pad to a board pad, distributing the connection function across multiple elements rather than relying on a single connection point, thereby improving overall connection reliability while maintaining structural clarity
Solution Approach 2:
A connection board is introduced as an intermediary component between the display panel and the circuit board. This intermediate board provides a stable platform for multiple connection lines, ensuring reliable signal transmission while isolating the complexity of the connection structure from both the display panel and circuit board
2Reliability
If direct contact connection is used between panel pad and connection line, then the manufacturing process is simple, but the contact reliability is insufficient
Solution Approach 1:
Ultrasonic vibration is applied during the bonding process between the connection line and panel pad. The mechanical vibration energy facilitates direct bonding of the materials, creating a reliable direct contact connection while maintaining a relatively simple manufacturing process that can be integrated into existing production lines
3Reliability
If connection lines are spaced apart from each other, then the signal transmission stability is improved, but the board area increases
Solution Approach 1:
The connection lines are spaced apart specifically in regions where signal transmission requires stability, while maintaining compact arrangement in other areas. This local optimization ensures signal transmission stability where needed without unnecessarily increasing the overall connection board area
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 design improves the connection reliability between the display panel and circuit board, ensuring stable signal transmission and enhancing the overall performance of the display device.
Implementation Method 1
employing ultrasonic vibration to form a direct bond between the panel pads and connection lines
Data Source
AI summary
A display device includes a display panel including a plurality of panel pads, a connection board including a plurality of connection lines, and a circuit board including a plurality of board pads. The plurality of connection lines are spaced apart from each other. Each of a connection line among the plurality of connection lines includes: a first end portion at which the connection line is connected to the display panel, the first end portion being in direct contact with a panel pad, and a second end portion opposite to the first end portion and at which the connection line is connected to the circuit board, the second end portion being in contact with a board pad.