Color Filter Substrate with Underlying Blocking Layer
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Solution Overview
Problem
As the size of liquid crystal display (LCD) apparatus increases, the manufacturing cost of the color filter substrate also rises due to the increasing amount of color filter pigment required, which is not efficiently managed in existing technologies.
Innovation Solution
The color filter substrate is designed with a first and second blocking layer, where the second blocking layer is formed under the color filter in each unit pixel, reducing the volume of the color filter and including a common electrode and protection layer, which can be made of organic materials, to decrease the amount of pigment needed and enhance color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of LCD apparatus increases, then the display area increases, but the manufacturing cost increases due to increased amount of color filter pigment
Solution Approach 1:
The patent introduces a vertical dimension by forming the second blocking layer beneath the color filter layer, creating a three-dimensional structure. This allows the blocking function to be distributed across multiple layers (first blocking layer at the substrate level and second blocking layer under the color filter), thereby reducing the horizontal spread and volume of the color filter pigment needed while maintaining effective light blocking across the increased display area.
2Manufacturing precision
If the thickness of color filter is increased, then color reproducibility improves, but the volume and manufacturing cost of color filter pigment increases
Solution Approach 1:
The patent segments the light blocking function into two separate blocking layers positioned at different vertical levels. The first blocking layer is formed on the substrate before the color filter, and the second blocking layer is formed under the color filter. This segmentation allows the color filter to be thinner while maintaining adequate light blocking, as the combined blocking effect of both layers provides sufficient contrast without requiring excessive color filter thickness.
Data Source
AI summary
A color filter substrate includes a color filter, a common electrode, a first blocking layer, and a second blocking layer. The color filter is formed in a unit pixel. The first blocking layer corresponds to an outline of the color filter. The second blocking layer is formed in the unit pixel, and under the color filter so to be covered by the color filter, thus decreasing a volume of the color filter. A common electrode is formed over the color filter and the first blocking layer. Thus, an amount of a color filter pigment required for manufacturing the substrate may be decreased and manufacturing cost may be decreased.