3D Transistor LCD Panel Connector Gravity Distribution
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Solution Overview
Problem
The yield rate of liquid crystal display panels based on three-dimensional transistors is decreased due to the damage of chip on film lines under the gravity of the printed circuit board, as there is only one COF attached between the array substrate and the printed circuit board, leading to crowded lines that are prone to damage.
Innovation Solution
Incorporating at least one connector, preferably made of copper laminate, aluminum foil laminate, or PET, between the array substrate and the printed circuit board to share the gravity and prevent damage to the chip on film lines, while also guiding static electricity to the printed circuit board through conductive plates and copper leakage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only one COF is attached between the array substrate and the printed circuit board, then the device complexity is reduced, but the reliability deteriorates due to line damage under gravity
Solution Approach 1:
The patent divides the single COF into multiple COFs (first COF and second COF) attached at different positions between the array substrate and printed circuit board. This segmentation distributes the mechanical load and gravity force across multiple attachment points, preventing line damage while maintaining structural integrity without significantly increasing overall device complexity.
2Manufacturing precision
If the lines of the COF are made narrower to reduce width, then the manufacturing precision is improved, but the reliability deteriorates due to increased susceptibility to damage
Solution Approach 1:
By using multiple COFs instead of a single wide COF, the patent achieves the same functional coverage with narrower individual lines that are less prone to damage. Each narrow line maintains high manufacturing precision while the collective arrangement of multiple COFs provides sufficient mechanical strength and reliability.
3Ease of manufacture
If the COF is attached at a single position, then the ease of manufacture is improved, but the reliability deteriorates due to concentrated gravity load
Solution Approach 1:
The patent implements multiple attachment positions for the COFs between the array substrate and printed circuit board. This segmentation distributes the gravity load across multiple attachment points, preventing concentrated stress on any single attachment while maintaining a relatively simple manufacturing process for each individual attachment point.
Solution Approach 2:
The patent introduces a buffer layer or cushioning structure between the COF and the array substrate/printed circuit board at each attachment position. This intermediary element absorbs and distributes the gravity load, protecting the narrow lines from mechanical damage while maintaining ease of attachment.
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
The connectors effectively support the array and printed circuit boards, preventing damage to the chip on film lines and improving the yield rate and quality of the liquid crystal display panel by distributing the gravity and guiding static electricity to ground, thus enhancing the panel's performance and longevity.
Implementation Method 1
each of the at least one connector is a conductive plate used to guide static electricity of the array substrate to the printed circuit board
Data Source
AI summary
A liquid crystal display device and a liquid crystal display panel based on three-dimensional transistor thereof are provided. The liquid crystal display panel includes an array substrate, a printed circuit board, a first chip on film with an integrated circuit, and At least one connector connected between the array substrate and the printed circuit board. The first chip on film is attached between the array substrate and the printed circuit board. The array substrate and the printed circuit board can be supported by the connectors effectively. The connectors share gravity of the printed circuit board with the first chip on film attached between the array substrate and the printed circuit board. Therefore, the present disclosure can avoid damage to lines of the first chip on film and improve the yield rate of the quality of the liquid crystal display panel based on three-dimensional transistor.