Capacitive Touch Display Electrode Assembly Layer Reduction
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Solution Overview
Problem
Existing touch-sensitive displays in portable electronic devices face challenges in optimizing space and improving user input efficiency due to limited space for user input and output, necessitating advancements in their assembly and functionality.
Innovation Solution
The proposed assembly for a touch-sensitive display includes a substrate with scanning and sense electrodes disposed between a color filter and black matrix, integrated with a thin-film transistor structure, and a controller to detect touches, enhancing touch detection accuracy and reducing manufacturing complexity by eliminating unnecessary layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional multi-layer assembly is used for touch-sensitive display, then manufacturing precision can be maintained, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the color filter and black matrix into a single integrated layer, and integrates the scanning and sense electrodes directly onto the substrate without requiring separate carrier substrates. This merging of functions reduces the total number of layers while maintaining the necessary functional precision for touch detection and display quality.
Solution Approach 2:
The substrate serves multiple functions simultaneously: it acts as the base for mounting scanning and sense electrodes, provides structural support, and serves as the foundation for the color filter and black matrix arrangement. This multi-functionality reduces the need for separate specialized layers, thereby reducing overall device complexity while maintaining manufacturing precision.
2Illumination intensity
If more layers are added to improve display quality, then display quality improves, but manufacturing cost and device thickness increase
Solution Approach 1:
The color filter and black matrix are combined into a single integrated arrangement that is disposed directly on the substrate. This merging maintains the optical quality necessary for display performance while reducing the number of separate manufacturing steps and layers required, thereby controlling manufacturing cost and device thickness.
3Manufacturing precision
If scanning electrodes and sense electrodes are disposed on separate substrates, then manufacturing precision can be maintained, but device complexity and manufacturing cost increase
Solution Approach 1:
Both scanning electrodes and sense electrodes are disposed on the same substrate, eliminating the need for separate carrier substrates for each electrode type. This merging reduces structural complexity while the precise positioning methods described in the patent ensure that electrode alignment and manufacturing precision are maintained.
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 improves touch detection accuracy and reduces manufacturing costs by minimizing the number of layers, while maintaining high display quality and clarity, effectively addressing the space constraints and efficiency needs of portable electronic devices.
Implementation Method 1
scanning electrodes and sense electrodes disposed between the substrate and the arrangement. A controller is coupled to the scanning electrodes and the sense electrodes, and is configured to detect touches on the touch-sensitive display
Data Source
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AI summary
An assembly includes a substrate (202), scanning electrodes (204) and sense electrodes (206) disposed on the substrate, and color filter (218) and black matrix (220) disposed in an arrangement on the scanning electrodes and sense electrodes. The scanning electrodes and sense electrodes are disposed between the substrate and the arrangement. The assembly forms a component of a touch-sensitive display.