Curved Display Substrate Alignment via Pre-Shifted Electrodes
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Solution Overview
Problem
Curved electronic display devices face challenges in maintaining proper alignment and functionality of pixel electrodes and light shielding portions due to substrate bending, leading to inadequate light filtering and shifting of components, which affects image quality.
Innovation Solution
The substrates are bent while maintaining their edges fixed in a perpendicular direction, with pixel electrodes and light shielding portions strategically positioned to account for the shift caused by curvature, ensuring proper alignment and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If substrates are bent to create curved display, then display shape is changed to curved form, but alignment between pixel electrodes and electrical lines shifts
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-adjusting the positions of pixel electrodes and light shielding portions before substrate bending. The pixel electrodes are positioned at specific offsets from their corresponding electrical lines based on predicted bending-induced shifts, so that after bending, the components align correctly despite the curvature-induced displacement.
Solution Approach 2:
The patent implements local quality by applying different positioning strategies to different regions of the display. Elements closer to the bending axis require different clearance adjustments compared to elements farther from the axis, as the shift magnitude varies locally across the curved substrate surface.
2Shape
If substrates are bent to create curved display, then display shape is changed to curved form, but light shielding portions shift relative to pixel electrodes
Solution Approach 1:
The patent applies preliminary action by pre-positioning light shielding portions at calculated offsets from their intended final positions. Before substrate bending, the light shielding portions are placed such that after bending-induced shifting, they correctly overlay the pixel electrodes to prevent light leakage and ensure proper color filtering.
Solution Approach 2:
The patent implements preliminary anti-action by intentionally positioning light shielding portions in locations that appear misaligned before bending, but which will become correctly aligned after bending. This counter-intuitive initial positioning compensates for the expected harmful shift, ensuring that the light shielding function remains effective in the final curved configuration.
3Manufacturing precision
If pixel electrodes are positioned to account for shift, then alignment is maintained after bending, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the positional parameters (clearances and offsets) of pixel electrodes and light shielding portions based on bending geometry. Specific clearance values are assigned to different pixel electrodes depending on their distance from the bending axis, with clearances increasing for elements farther from the axis to compensate for greater shift magnitudes.
Data Source
AI summary
A curved display includes a first substrate and a second substrate in a stacked configuration. The first substrate includes pixel electrodes that are arranged in a matrix and electrical lines that extend in a first direction. The second substrate includes light shielding portions that extend in the first direction. Also disclosed is a method for manufacturing a curved display that includes attaching a first substrate to a second substrate in a stacked configuration and bending the first substrate and the second substrate to be curved.