Array Substrate Golden Finger Non-Uniform Spacing for Curved Displays
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Solution Overview
Problem
Display panels with curved surfaces experience instability due to dislocation of golden fingers on the array substrate after bending, leading to poor contact and abnormal display performance.
Innovation Solution
The array substrate features pads with non-identical intervals between parallel first golden fingers, which adjust to match with second golden fingers on the chip on film after bending, ensuring good contact and preventing dislocation, using an anisotropic conductive film for adhesion and grooves to enhance bonding and reduce bending stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the bonding area is bent to create curved-surface display panels, then the display panel achieves curved surface morphology, but the golden fingers dislocate and contact stability deteriorates
Solution Approach 1:
The patent applies local quality by making the intervals between adjacent golden fingers non-uniform in specific regions. The interval adjustment is localized to areas experiencing greater bending stress, while other regions maintain standard spacing. This targeted modification allows the golden fingers to maintain proper alignment after bending without requiring non-uniform spacing across the entire structure.
Solution Approach 2:
The patent introduces asymmetry by deliberately creating non-identical intervals between adjacent golden fingers. Instead of uniform spacing, the interval between each golden finger and its neighbor is specifically designed to be different, compensating for the asymmetric deformation that occurs during bending. This asymmetric design allows the structure to maintain functional alignment after curvature is applied.
2Ease of manufacture
If uniform intervals are used between golden fingers, then manufacturing is simplified, but bending causes dislocation and poor contact
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the intervals between golden fingers during the manufacturing process to account for future bending deformation. The non-uniform spacing is built into the structure before bending occurs, so that when the display panel is curved, the golden fingers naturally align with their corresponding contacts. This proactive design compensates for bending effects without requiring post-bending adjustments.
3Reliability
If the intervals between golden fingers are adjusted to compensate for bending, then contact stability is maintained, but the structure becomes more complex
Solution Approach 1:
The patent minimizes structural complexity by applying non-uniform intervals only where necessary - specifically in regions experiencing significant bending stress. Most other regions maintain standard uniform spacing, which keeps the overall structure simple and easy to manufacture. This localized approach to interval adjustment balances reliability improvement with structural simplicity.
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 solution maintains effective electrical contact between the array substrate and the chip on film, preventing dislocation and abnormal display issues in curved display panels by adjusting finger intervals to match the curvature, thus ensuring stable and proper display functionality.
Implementation Method 1
The first golden fingers are electrically connected to the plurality of second golden fingers, respectively... the first golden finger adheres to the second golden finger via an anisotropic conductive film
Implementation Method 2
each of the first golden fingers has a surface that is configured to be electrically connected to the second golden finger on the chip on film, and the surface is provided with a groove... the groove extends along a fold line
Data Source
AI summary
An array substrate (100, 200, 300) comprises a display region (110) and a bonding region (130, 230, 330). The bonding region (130, 230, 330) is disposed around the display region (110). The bonding region (130, 230, 330) of the array substrate (100, 200, 300) is provided with at least one pad (150, 250). The at least one pad (150, 250) comprises a plurality of first gold fingers (151, 251, 351) spaced apart and arranged in parallel. Intervals between adjacent first golden fingers (151, 251, 351) in the same pad (150, 250) are not entirely the same.