L-Shaped Spacer for TFT-LCD Panel Stability
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Solution Overview
Problem
In Thin Film Transistor Liquid Crystal Displays (TFT-LCDs), spherical or cylindrical spacers are prone to distortion, rupture, or slippage under pressure, leading to display defects and uneven light transmission due to insufficient restoring force, affecting the aperture ratio and grayscale performance.
Innovation Solution
A color filter substrate with spacers having a cross-sectional shape featuring a first supporting portion and a second supporting portion, where the first direction is perpendicular to the second direction, with the first supporting portion being larger than the second, and the second supporting portion connected to the first, reducing shearing stress and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spherical or cylindrical spacers are used to control liquid crystal layer thickness, then the spacer positioning can be achieved, but the spacers are prone to distortion, rupture or slippage under pressure or shearing force
Solution Approach 1:
The spacer is divided into multiple supporting portions (first supporting portion extending along first direction, second supporting portion extending along second direction) that are connected together. This segmentation allows each portion to independently bear stress in its specific direction, preventing the entire spacer from distorting or rupturing under pressure or shearing force.
Solution Approach 2:
The spacer transitions from a one-dimensional linear structure (cylindrical) or zero-dimensional point structure (spherical) to a two-dimensional cross-sectional shape with multiple supporting portions extending in different directions. This dimensional change enables the spacer to resist forces from multiple directions simultaneously, significantly improving its structural strength and stability.
2Ease of operation
If spherical spacers are sprayed onto preset regions, then the spacers can be positioned, but positional deviation occurs as spacers roll during the spraying process
Solution Approach 1:
The spacer adopts an asymmetric cross-sectional shape with a first supporting portion and a second supporting portion of different orientations and dimensions. This asymmetric design creates an inherent positional reference, allowing the spacer to be oriented correctly during the spraying process and preventing rotational deviation, thereby improving positioning accuracy.
Solution Approach 2:
The spacer structure is pre-designed with specific supporting portions that extend in different directions before the spraying process. This preliminary structural configuration ensures that the spacer maintains its intended orientation and position during spraying, eliminating the need for post-positioning adjustments and preventing deviation caused by rolling.
3Reliability
If damaged spacers are subjected to external force, then debris may enter the display region causing display defects, but the restoring force of damaged spacers is insufficient to prevent panel denting
Solution Approach 1:
The segmented structure with multiple supporting portions allows stress to be distributed across different segments rather than concentrating at a single point. When external force is applied, each supporting portion independently absorbs and distributes the load, preventing catastrophic failure and reducing the generation of debris that could enter the display region.
Solution Approach 2:
The spacer's cross-sectional dimensions and shape parameters are optimized to enhance its mechanical properties. By adjusting the size and orientation of the supporting portions, the spacer achieves improved strength-to-weight ratio and elastic restoring force, enabling it to better resist external pressure and maintain panel flatness even after partial damage.
Data Source
AI summary
Embodiments of the invention provide a color filter substrate and a manufacturing method for the same, and a display device. The color filter substrate comprises a plurality of spacers. The spacer has a cross-sectional shape in a direction parallel to the color filter substrate, and the cross-sectional shape including a first supporting portion extending along a first direction and a second supporting portion extending along a second direction, which is connected to an end portion of the first supporting portion, the first direction being perpendicular to the second direction.