Flexible Display Pad Alignment via Convergent Virtual Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display panels and structures face disconnection issues due to misalignment and deformation during bonding, especially under temperature and humidity changes, affecting signal transmission and display quality.
Innovation Solution
The design features obliquely extending pads with convergent virtual extension lines and equally-divided points to ensure accurate alignment and reduce misalignment probability, improving bonding yield and reliability by allowing for adjustable pad positions and inclination angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of flexible display panel increases, then the display quality is improved, but the pad dimension decreases and pad density increases, making the bonding process more prone to misalignment and disconnection
Solution Approach 1:
The bonding region is divided into multiple rows of pads, with each row containing multiple pads arranged along the first direction. This segmentation allows for systematic alignment control across different rows, reducing the overall complexity of aligning all pads simultaneously while maintaining high density
Solution Approach 2:
Pads in adjacent rows are arranged with relative offset, where pads in the (i+1)-th row are positioned relative to equally-divided points in the i-th row. This asymmetric arrangement creates a staggered pattern that reduces misalignment propagation and provides tolerance for bonding variations
2Quantity of substance
If the pad dimension decreases to increase pad density, then the signal transmission capacity is improved, but the alignment precision between pads becomes more difficult to maintain
Solution Approach 1:
The pad arrangement extends in two directions (first direction for horizontal arrangement, second direction for vertical rows), creating a two-dimensional grid pattern. This dimensional approach allows density increase in both directions while maintaining alignment control through the structured offset pattern between rows
Solution Approach 2:
The offset distance between pads in adjacent rows is specifically designed based on pad dimensions and bonding tolerances. By optimizing this parameter, the design accommodates smaller pad sizes while maintaining sufficient alignment margin during the bonding process
3Adaptability or versatility
If the flexible display panel and flexible structure undergo deformation during bending, then the flexibility is improved, but the misalignment between pads increases causing disconnection
Solution Approach 1:
The offset arrangement of pads in adjacent rows creates a built-in tolerance buffer before bonding. This pre-designed offset provides a cushion against misalignment caused by deformation during bending, allowing the structure to flex while maintaining pad alignment through the staggered configuration
4Adaptability or versatility
If temperature and humidity factors affect the bonding process, then the environmental adaptability is improved, but the misalignment and disconnection probability increases
Solution Approach 1:
The offset distance and row spacing are designed with sufficient margin to accommodate thermal expansion and humidity-induced dimensional changes. This parameter optimization ensures that alignment precision is maintained across varying environmental conditions during the bonding process
Data Source
AI summary
The flexible structure includes substrate and n rows of first pads arranged on a side of substrate, first pads in each row arranged along a first direction; a virtual extension line of the first pad extends in an oblique direction with respect to a second direction, and virtual extension lines of all first pads intersect at a same convergent point, the first direction is perpendicular to the second direction; at least one equally-divided point is defined in a space between two adjacent first pads in an i-th row; and a central point of each first pad in an (i+1)-th row, a first setting equally-divided point of the at least one equally-divided point, and the convergent point are located on a same straight line, n is integer greater than 1, i is positive integer, i less than n, and m equal to (n−i+1).