Display Panel Edge Structure for Precise Black Matrix Cutting
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Solution Overview
Problem
During the cutting process of display apparatus manufacturing, components adjacent to the cutting line can be damaged, leading to an increased non-display area and deteriorated display quality due to uneven laser cutting, which affects the efficiency and quality of the final product.
Innovation Solution
Incorporating a blocking layer with higher thermal conductivity than the black matrix, which extends along the edges of the substrate and has no step difference with the black matrix, to protect adjacent layers from laser damage and serve as a reference point for precise cutting, thereby minimizing the non-display area and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser cutting is used to cut the substrate and black matrix, then cutting speed and productivity are improved, but components adjacent to the cutting line are damaged due to uneven cutting and thermal effects
Solution Approach 1:
A blocking layer with higher thermal conductivity than the black matrix is introduced as an intermediary component between the black matrix and the substrate. This blocking layer serves as a thermal barrier that prevents excessive heat from the laser cutting process from damaging the black matrix and adjacent components, while still allowing the cutting to proceed efficiently.
Solution Approach 2:
The blocking layer is formed in advance before the laser cutting process. By pre-positioning this thermal management layer at the cutting line, the system prepares for the thermal effects of laser cutting beforehand, ensuring that the black matrix and adjacent components are protected from heat damage during the high-speed cutting process.
2Area of stationary object
If the black matrix is extended to the edge of the substrate to minimize non-display area, then display quality is improved, but the black matrix becomes vulnerable to damage during cutting
Solution Approach 1:
The blocking layer acts as a protective intermediary between the extended black matrix and the laser cutting process. By positioning the blocking layer at the cutting line with higher thermal conductivity, it shields the black matrix edges from thermal damage while allowing the black matrix to extend to the substrate edges for minimized non-display area.
Solution Approach 2:
The blocking layer provides beforehand cushioning against thermal damage to the black matrix. By having this thermal management layer in place before cutting, the system cushions the black matrix from the harmful thermal effects of laser cutting, ensuring component integrity even when the black matrix extends to the edges.
3Manufacturing precision
If a blocking layer with higher thermal conductivity than the black matrix is introduced to protect adjacent layers, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The blocking layer is designed to serve multiple functions: it acts as a thermal barrier to protect the black matrix from laser-induced heat, provides a reference point for precise cutting alignment, and maintains structural integrity at the cutting line. By combining these functions in a single layer, the patent reduces overall device complexity compared to having separate components for each function.
Solution Approach 2:
The blocking layer combines thermal management and alignment reference functions into a single integrated structure. Rather than having separate thermal barrier layers and alignment markers, the patent merges these functions into the blocking layer, simplifying the overall device structure while maintaining manufacturing precision.
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
The blocking layer effectively prevents damage to adjacent layers during cutting, reduces the non-display area, and improves the overall display quality by ensuring precise cutting and uniformity, thus enhancing the manufacturing efficiency and image quality.
Implementation Method 1
a blocking layer between the black matrix and the substrate, wherein a tip end of the blocking layer has no step difference with an end of the black matrix
Data Source
AI summary
A display apparatus includes: a substrate; a pixel circuit layer on the substrate and including a thin-film transistor; a display element layer on the pixel circuit layer and including a display element electrically connected to the thin-film transistor; a color filter layer on the display element layer and including a color filter overlapping the display element and a black matrix having a first side contacting the color filter and a second side extending in an edge direction of the substrate; and a blocking layer between the black matrix and the substrate, wherein a tip end of the blocking layer has no step difference with an end of the black matrix.