Display Panel Light-Shielding Layer Gap Region Design
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Solution Overview
Problem
In display panels formed by splicing multiple sub-panels, the large-sized black matrix required to prevent light leakage at joints results in display defects like black stripes, deteriorating the display effect.
Innovation Solution
A display panel design where a light-shielding layer is strategically placed in the gap region between sub-panels, with the black matrix positioned away from the gap, allowing for a reduced light-shielding width and eliminating display defects like black stripes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large-sized black matrix is provided at the joints of adjacent display sub-panels to prevent light leakage, then light leakage is reduced, but display defects such as black stripes occur at the joints, deteriorating the display effect
Solution Approach 1:
The patent divides the light-shielding function into two separate components: a black matrix for shielding data lines and a distinct light-shielding layer for shielding joint gaps. This segmentation allows each component to be optimized independently, preventing the black matrix from extending into the joint gap and causing black stripe defects while still achieving comprehensive light leakage prevention.
Solution Approach 2:
The patent extracts the light-shielding function from the black matrix by introducing a separate light-shielding layer. This extraction removes the harmful effect of the black matrix extending into joint gaps (causing black stripes) while preserving the beneficial light-shielding effect through the dedicated light-shielding layer positioned at the joint gaps.
2Object-affected harmful factors
If the black matrix covers both the joint gap and adjacent data lines, then light leakage at data lines is prevented, but the display area is reduced and black stripe defects occur
Solution Approach 1:
The patent segments the light-shielding coverage by assigning the black matrix to cover only data lines and the light-shielding layer to cover joint gaps. This segmentation ensures that the display area is maximized by preventing the black matrix from encroaching on the joint gap region, while both light leakage paths (data lines and joints) are still shielded.
Solution Approach 2:
The patent extracts the light-shielding function from the black matrix and places it in a separate light-shielding layer positioned at joint gaps. This extraction allows the black matrix to be confined to its optimal position covering data lines, maximizing display area while preventing light leakage at data lines.
3Object-affected harmful factors
If a separate light-shielding layer is added to shield joint gaps, then light leakage at joints is reduced, but device complexity increases
Solution Approach 1:
The patent merges the light-shielding layer with existing structural layers in the display panel, integrating it into the overall device architecture rather than adding it as a completely separate component. This merging approach provides effective joint gap shielding while minimizing the increase in device complexity.
Data Source
AI summary
There are provided a display panel and a manufacturing method thereof. The display panel includes first and second display sub-panels with a gap region arranged therebetween; and a light-shielding layer at least located in the gap region, the first and second display sub-panels each include multiple pixel units arranged in an array, each pixel unit includes: a substrate; a data line on the substrate; a black matrix on a side of the data line away from the substrate, an orthographic projection of the data line on the substrate falls within that of the black matrix on the substrate, in at least one of the first and second display sub-panel, the black matrix of the pixel unit closest to the gap region and the light-shielding layer are arranged with an interval therebetween, the black matrix is located on a side of the light-shielding layer away from the gap region.