Integrated Touch Polarization Substrate Eliminating Misalignment
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Solution Overview
Problem
Current touch screens face challenges in manufacturing thin devices due to misalignment and air bubbles between display panels and touch sensing substrates, leading to complex rework processes and potential scrapping of defective screens.
Innovation Solution
A touch sensing substrate integrating polarization and touch functions, featuring first and second touch electrodes with specific geometric arrangements and bridging lines, allowing for efficient touch sensing and linear polarization, which can be used as part of a display, such as a color filter array substrate or polarizer, to prevent misalignment and air bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display panel and touch sensing substrate are adhered using OCA, then touch sensing function is achieved, but misalignment and air bubbles occur leading to complex rework
Solution Approach 1:
The patent merges the polarization layer and touch sensing substrate into a single integrated structure. The touch electrodes are formed directly on the polarization layer, eliminating the need for separate OCA adhesion between display panel and touch substrate. This integration removes the interface where misalignment and air bubbles typically occur, thereby simplifying the manufacturing process and reducing rework complexity while maintaining touch sensing reliability
2Length of moving object
If touch screen thickness is reduced, then portability is improved, but misalignment and air bubbles become more difficult to repair
Solution Approach 1:
By integrating the touch sensing function directly into the polarization layer, the patent eliminates the separate touch substrate that would require OCA adhesion. This integration means that even in thin designs, there are no separate layers to misalign or trap air bubbles between, making defects far less common and much easier to repair if they do occur
Solution Approach 2:
The polarization layer serves dual functions: both polarization and touch sensing. This multi-functionality allows the structure to maintain thin profiles while avoiding the defects associated with multi-layer adhesion, thereby improving both portability and repairability simultaneously
3Adaptability or versatility
If separate display panel and touch sensing substrate are used, then manufacturing flexibility is maintained, but misalignment occurs requiring precise aligning process
Solution Approach 1:
The patent combines the touch sensing substrate and polarization layer into one integrated component, eliminating the need for precise aligning processes between separate layers. The touch electrodes are formed directly on the polarization layer in a single manufacturing sequence, maintaining manufacturing flexibility while eliminating alignment precision requirements
Solution Approach 2:
The touch electrodes are formed directly on the polarization layer during the polarization layer formation process itself, before any assembly operations. This preliminary integration ensures that no subsequent aligning is needed, reducing manufacturing complexity while maintaining flexibility
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
The integrated structure enables the production of thinner touch screens with reduced defects, eliminating the need for rework and improving product yield by providing effective touch sensing and polarization capabilities.
Implementation Method 1
widths of each of the first conducting lines and each of the second conducting lines range from approximately 50 to 100 nanometers... have a linear polarization function
Data Source
AI summary
A structure integrating polarization and touch functions includes first touch electrodes and second touch electrodes. A first touch electrode includes a first connecting line and a plurality of first conducting lines. End points of the first conducting lines are disposed along an outline of an M-sided polygon (M≥3). For the first touch electrode, the first connecting line electrically connects the first conducting lines. A second touch electrode includes a plurality of second conducting lines and a second connecting line. End points of the second conducting lines are disposed along an outline of an N-sided polygon (N≥3). For a second touch electrode, the second connecting line electrically connects the second conducting lines. Widths of the first and second conducting lines range from approximately 50 to 100 nanometers.