Display Substrate Touch Control Structure Layer Integration
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Solution Overview
Problem
Current display substrate technologies face challenges such as complex processes, high costs, and limited brightness attenuation angles, particularly in flexible multi-layer on cell (FMLOC) and CF on encapsulation (COE) technologies.
Innovation Solution
A display substrate design that incorporates a touch control structure layer between color optical filters, featuring a touch control connection electrode and a coating protective layer, which reduces the distance between the organic light emitting layer and the color filter layer, thereby simplifying the process, lowering costs, and increasing brightness attenuation angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the touch control structure layer is arranged between color optical filters, then the distance between the organic light emitting layer and the color filter layer is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the touch control structure layer with the color filter layer by arranging the touch control connection electrode and touch control electrode between the color optical filters. This integration allows the touch control function and color filtering function to share the same structural space, reducing the overall distance between the organic light emitting layer and the color filter layer while maintaining both functionalities.
Solution Approach 2:
The color filter layer is designed to serve multiple functions: it acts as both the color optical filter and the touch control structure layer. The touch control connection electrode and touch control electrode are embedded within the color filter layer, enabling the layer to simultaneously perform color filtering and touch control operations, thereby reducing the need for separate layers and simplifying the overall structure.
2Length of stationary object
If the touch control structure layer is integrated into the color filter layer, then the substrate thickness is reduced, but the process complexity increases
Solution Approach 1:
The patent combines the touch control structure layer with the color filter layer, integrating multiple functions into a single layer. This merging reduces the overall substrate thickness by eliminating redundant layers and structures, while the integrated design allows for streamlined manufacturing processes that can reduce complexity over time through consolidation.
Solution Approach 2:
The color filter layer is segmented into multiple functional components: the color optical filters, the touch control connection electrode, the first coating protective layer, and the touch control electrode. This segmentation allows each component to be optimized for its specific function while maintaining a compact overall structure that reduces substrate thickness.
3Reliability
If multiple metal layers are used in the touch control electrode, then the touch control performance is improved, but the manufacturing cost increases
Solution Approach 1:
The touch control electrode is constructed using composite material layers, specifically a first metal layer and a second metal layer with different reflectivity characteristics. This composite structure improves touch control performance by optimizing both conductivity and optical properties, while the use of standard metal materials and established deposition techniques helps control manufacturing costs.
Solution Approach 2:
The second metal layer is designed with lower reflectivity compared to the first metal layer, creating local quality differences within the touch control electrode structure. This local optimization of reflectivity properties enhances touch control performance in specific areas without requiring expensive materials throughout the entire structure, thereby balancing performance improvement with cost control.
Data Source
AI summary
A display substrate, a preparation method thereof and a display apparatus. The display substrate comprises a substrate, multiple pixel units arranged on the substrate and a color filter layer arranged on the pixel unit, wherein the color filter layer comprises color optical filters of different colors and a touch control structure layer arranged between the color optical filters of different colors; the touch control structure layer comprises a touch control connection electrode, a first coating protective layer covering the touch control connection electrode and a touch control electrode arranged on the first coating protective layer, the touch control electrodes comprise a first touch control electrode and a second touch control electrode, and at least one of the first touch control electrode and the second touch control electrode is connected with the touch control connection electrode through a via hole penetrating through the first coating protective layer.