Segmented Black Matrix with Insulating Gap for Display Substrate
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Solution Overview
Problem
In display panels, the black matrix (BM) can cause issues like ink mura due to its conductivity and interaction with external electric fields, which affects the display quality.
Innovation Solution
A display substrate design featuring a base substrate with a black matrix comprising a first and second BM portion separated by a gap filled with a material of higher resistivity than the BM, which effectively shields external electric fields, preventing them from impacting the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the black matrix is made continuous to ensure conductivity and structural integrity, then the structural strength is improved, but ink mura defects occur due to interaction with external electric fields
Solution Approach 1:
The black matrix is divided into multiple segments (first black matrix portion and second black matrix portion) separated by gaps. This segmentation breaks the continuous conductive path, preventing external electric fields from interacting with the entire black matrix structure and causing ink mura defects, while each segment maintains sufficient conductivity for its local function.
Solution Approach 2:
Insulating materials are introduced as intermediaries to fill the gaps between black matrix portions or as coating layers on the black matrix. These intermediary insulating materials block the interaction between external electric fields and the conductive black matrix, eliminating ink mura while preserving the structural framework.
2Object-affected harmful factors
If the black matrix is made discontinuous to prevent ink mura, then display quality is improved, but conductivity is reduced
Solution Approach 1:
The black matrix is segmented into multiple portions with gaps between them, reducing overall conductivity to prevent ink mura while each individual segment maintains sufficient conductivity for local electrostatic control.
Solution Approach 2:
Different regions of the black matrix have different properties: the black matrix portions maintain conductivity for local electrostatic control, while the gaps or insulating coatings provide insulation to block external field interactions. This local differentiation allows simultaneous optimization of conductivity and ink mura prevention.
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 design prevents defects such as ink mura and improves the display effect by effectively shielding external electric fields, enhancing the overall performance of the display panel.
Implementation Method 1
filling the gap between the first black matrix portion and the second black matrix portion with a target material of which the resistivity is greater than that of the black matrix... effectively shields external electric fields, preventing them from impacting the display area
Data Source
AI summary
A display substrate and a manufacturing method thereof, and a display panel are provided. The display substrate includes a base substrate with a black matrix BM disposed thereon. The base substrate is provided with a display area and a non-display area, and the BM disposed in the non-display area comprises a first BM portion and a second BM portion. The first BM portion and the second BM portion are sequentially arranged in a direction away from the center of the base substrate, and a gap exists between the first BM portion and the second BM portion. When an external electric field exists around the display substrate, the second BM portion can effectively shield the external electric field, thereby effectively preventing the external electric field from affecting the display area of the display panel. Thus, the display effect of the display substrate is improved.