Filter Color-Resisting Blocks Surface Evenness
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Solution Overview
Problem
The existing methods for manufacturing liquid crystal display filters result in uneven surfaces and 'ox horn-shaped segment differences' due to varying film thicknesses of color-resisting blocks, affecting the alignment of liquid crystals and display quality.
Innovation Solution
A method involving a transparent substrate with a patterned foundation layer and light-shielding layer, where through holes are formed with grooves under the color-resisting blocks to adjust their bottom heights, ensuring evenness and eliminating protrusions, by calculating and forming grooves to match thickness differences between color-resisting blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color-resisting blocks of different colors are formed with different material thicknesses to achieve required chroma, then the chroma of each color block is improved, but the surface evenness deteriorates and 'ox horn-shaped segment differences' occur
Solution Approach 1:
The patent applies preliminary action by forming grooves in the foundation layer before depositing the light-shielding layer and color-resisting blocks. These pre-formed grooves compensate for the thickness differences of different color materials, ensuring that the top surfaces of all color blocks align at the same height. This preliminary structural adjustment prevents surface unevenness before the coloring process occurs.
Solution Approach 2:
The patent applies local quality by creating grooves with different depths at different locations corresponding to different color blocks. Each groove depth is specifically designed to match the thickness difference of that particular color material, providing localized compensation rather than a uniform structure. This allows each color block to achieve its required chroma while maintaining overall surface evenness.
2Ease of manufacture
If photo-etching development process is used to pattern the light-shielding layer and form color-resisting blocks, then the manufacturing process is simplified, but surface unevenness and alignment problems occur
Solution Approach 1:
The patent applies preliminary action by pre-forming grooves in the foundation layer before creating the light-shielding layer patterns. This preliminary groove formation ensures that when color-resisting blocks are subsequently formed using photo-etching, they will rest on a compensated surface, eliminating the need for complex post-processing alignment adjustments and preventing ox horn-shaped defects.
3Adaptability or versatility
If different thicknesses of color-resisting blocks are used to represent different colors, then the color display capability is improved, but liquid crystal alignment is affected
Solution Approach 1:
The patent applies preliminary action by forming compensating grooves in the foundation layer before depositing color materials of different thicknesses. This ensures that despite the varying thicknesses required for different colors (red, green, blue), the top surfaces of all color blocks will be at the same height, providing a uniform surface for liquid crystal alignment and preventing alignment defects.
Data Source
AI summary
A method of making a filter adjusts the bottom heights of the color-resisting colors to make the top ends of the color-resisting blocks be in a same level by disposing the foundation layer between the transparent substrate and the light-shielding layer and disposing the groove in the foundation layer, so that ensuring that surfaces of the filter have a good evenness and the alignment of liquid crystals is normal for enhancing the displaying effect of the liquid crystal display. The present invention improves the bottom evenness of the through holes by disposing the foundation layer on the bottoms of the through holes, thereby eliminating the “ox horn-shaped segment difference” of the protruding edges of the color-resisting blocks formed later.