Temperature Regulation Mask for LCD Alignment Layer Uniformity
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Solution Overview
Problem
The uneven thickness of the polyimide alignment layer in liquid crystal display panels due to varying pre-curing conditions, particularly around metallic wirings, leads to the formation of PI halation regions, affecting display quality.
Innovation Solution
A temperature regulation mask with a base and pattern regions of varying thermal conductivity is used between the pre-curing heating plate and the substrate, where the pattern regions correspond to metallic wiring areas, allowing for balanced temperature distribution and uniform solvent evaporation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pre-curing heating plate is heated with uniform temperature, then the heating process is simple and efficient, but the actual surface temperature of metallic wiring regions becomes higher than other regions, causing PI halation and uneven alignment layer thickness
Solution Approach 1:
The heating plate is divided into different heating zones with different heating strengths. Specifically, the heating plate includes a first heating area corresponding to the metallic wiring region and a second heating area corresponding to the display pixel region, where the first heating area has a first heating strength and the second heating area has a second heating strength that is different from the first heating strength. This allows different regions to receive appropriate heating intensity to achieve uniform temperature distribution across the substrate surface.
Solution Approach 2:
The heating parameters (heating strength) are changed across different regions of the heating plate. By adjusting the heating strength parameter spatially - stronger heating in display pixel regions and weaker heating in metallic wiring regions - the patent compensates for the temperature rise caused by metallic wirings, thereby achieving uniform actual surface temperature across different regions.
2Device complexity
If the pre-curing heating plate uses uniform heating, then the device structure is simple, but it cannot ensure uniform curing of the alignment layer on substrate surfaces with various pattern designs
Solution Approach 1:
The heating plate incorporates different heating zones with locally optimized heating characteristics. The first heating area (corresponding to metallic wiring regions) and second heating area (corresponding to display pixel regions) have different heating strengths, creating a non-uniform heating distribution that compensates for the non-uniform thermal properties of the substrate.
Solution Approach 2:
The heating plate is segmented into multiple independent heating zones that can be controlled separately. This segmentation allows each region to be heated according to its specific requirements, with the first heating area providing different heating strength compared to the second heating area, thereby achieving uniform overall heating效果 despite the complex substrate pattern.
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 approach ensures an even thickness of the alignment layer, improving display quality by preventing PI halation and ensuring uniform curing across the substrate.
Implementation Method 1
A pattern region of the temperature regulation mask has a different thermal conductivity from a thermal conductivity of a non-pattern region of the temperature regulation mask
Implementation Method 2
the solvent in a region having a higher surface temperature is volatilized quickly
Data Source
AI summary
The invention discloses a temperature regulation mask and an alignment layer pre-curing device, and is related to the field of manufacturing a liquid crystal display panel. Said temperature regulation mask is suitable for the alignment layer pre-curing device for pre-curing an alignment layer, and includes a base and a pattern arranged on the base. A pattern region of said temperature regulation mask has a different thermal conductivity from a thermal conductivity of a non-pattern region of said temperature regulation mask. A position of the one having a lower thermal conductivity among the pattern region and the non-pattern region of said temperature regulation mask corresponds to a position of said alignment layer corresponding to a metallic wiring region. The present invention can obtain an alignment layer with even thickness and improve a display quality.