Color Filter Substrate with Embedded Cavities for Reflective Displays
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Solution Overview
Problem
Conventional color filter patterns on the surface of color filter substrates in display apparatuses suffer from excessive light reflection and scattering, leading to the color washout phenomenon, especially in reflective flat panel displays, due to their structural design which compromises structural strength and optical performance.
Innovation Solution
The color filter patterns are embedded within cavities of a transparent substrate, allowing for closer proximity to a reflective structure layer, reducing random light scattering and reflection, and enhancing structural reliability by maintaining substrate thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filter patterns are disposed on the surface of the color filter substrate, then the manufacturing process is simple, but the light reflection and scattering effects cause color washout phenomenon
Solution Approach 1:
The color filter patterns are nested inside the containing cavities of the transparent substrate, with the cavities extending from the upper surface toward the lower surface. This nesting structure positions the color filter patterns away from the external environment, reducing direct light reflection and scattering while maintaining manufacturing feasibility through the cavity formation process.
Solution Approach 2:
The color filter patterns are transitioned from a two-dimensional surface arrangement to a three-dimensional configuration within the containing cavities. This dimensional change allows the color filter patterns to be positioned at different depths, specifically contacting the bottom surfaces of the cavities, thereby reducing optical interference from surface reflections.
2Weight of moving object
If the transparent substrate is thinned to reduce weight and size, then the display apparatus becomes more compact, but the structural strength and reliability are compromised
Solution Approach 1:
The transparent substrate is segmented into functional regions by the containing cavities, which are formed by dividing the substrate. This segmentation allows the substrate to maintain sufficient structural strength through the cavity walls while achieving the desired thinness for weight reduction. The cavities themselves provide structural support elements within the thinned substrate.
Solution Approach 2:
The color filter patterns are nested inside the containing cavities, which are formed within the transparent substrate. This nested structure allows the substrate to be thinned while the cavities provide internal structural support. The cavities act as reinforcing elements that prevent substrate deformation and breakage despite the reduced overall thickness.
3Object-affected harmful factors
If color filter patterns are positioned closer to the reflective structure layer, then the color washout is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The containing cavities are formed in advance within the transparent substrate before the color filter patterns are positioned. This preliminary action establishes precise positioning references (the cavity bottom surfaces) that guide the subsequent placement of color filter patterns, ensuring accurate positioning without requiring extremely tight manufacturing tolerances for the final assembly step.
Solution Approach 2:
The containing cavities serve as intermediary structures between the transparent substrate and the color filter patterns. The cavities provide a defined spatial framework that mediates the positioning relationship, allowing the color filter patterns to be accurately positioned relative to the reflective structure layer through the cavity geometry rather than requiring direct precision in the final positioning step.
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 configuration effectively mitigates the color washout phenomenon, improving the optical performance of display apparatuses by minimizing light scattering and reflection, while maintaining structural integrity of the color filter substrate.
Implementation Method 1
the light entering the color filter substrate would produce reflected light having an excessively large tilting angle and passing through color filter patterns with other colors due to reflecting and scattering effects
Implementation Method 2
the light entering the color filter substrate would produce reflected light having an excessively large tilting angle and passing through color filter patterns with other colors due to reflecting and scattering effects
Data Source
AI summary
A color filter substrate includes a transparent substrate and a plurality of color filter patterns. The transparent substrate has an upper surface and a lower surface opposite to each other, and a plurality of containing cavities. The containing cavities extend from the upper surface toward the lower surface and separate from each other. Each containing cavity has a bottom surface. The color filter patterns are disposed on the transparent substrate and located inside the containing cavities, respectively. The color filter patterns contact with the corresponding bottom surfaces, respectively.