Composite Polarizing Plate-Integrated Touch Sensing Electrode
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Solution Overview
Problem
Conventional liquid crystal displays face challenges in achieving a thin structure due to the thickness and size limitations of the polarizing plate and protective layers, making it difficult to apply them to flexible and portable devices.
Innovation Solution
A method for manufacturing a touch screen panel with a composite polarizing plate-integrated touch sensing electrode, where the touch sensing electrode is directly formed on the composite polarizing plate, eliminating the need for a separate substrate and allowing for a thin structure, and the polarizing plate and retarder are formed in a single coating layer, which also functions as an insulation layer, simplifying the manufacturing process and enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional polarizing plate with thickness of 200 to 400 μm and a protective layer with thickness of 25 to 100 μm are used, then the polarizing plate provides adequate protection and polarization function, but the overall display device thickness increases and flexibility is reduced
Solution Approach 1:
The patent combines the polarizing plate and protective layer into a single integrated structure where the polarizing plate itself serves as the protective element. This merging eliminates the need for a separate protective layer, reducing total thickness while maintaining both protection and polarization functions.
Solution Approach 2:
The polarizing plate is designed to perform multiple functions simultaneously: it provides polarization, protection, and structural support. By making the polarizing plate multi-functional, the patent eliminates the need for separate protective layers, thereby reducing overall device thickness and improving flexibility.
2Ease of operation
If separate substrate and insulation layers are used for touch sensing electrodes, then the touch sensing function is achieved, but the device structure becomes complex and thickness increases
Solution Approach 1:
The patent integrates the touch sensing electrode directly onto the polarizing plate surface, merging the touch sensing function with the existing polarizing plate structure. This eliminates the need for separate substrate and insulation layers, simplifying the overall device structure while maintaining touch sensing functionality.
Solution Approach 2:
The polarizing plate serves dual purposes: it maintains its polarization function while also serving as the substrate for the touch sensing electrode. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity and thickness.
3Reliability
If multiple separate layers (polarizing plate, protective layer, insulation layer) are used, then each layer performs its specific function, but the manufacturing process becomes complex and productivity decreases
Solution Approach 1:
The patent merges the polarizing plate and protective layer into a single integrated component, reducing the number of manufacturing steps. Instead of separately manufacturing and assembling multiple layers, the integrated structure can be produced in fewer steps, improving manufacturing efficiency and productivity.
Solution Approach 2:
By designing the polarizing plate to perform multiple functions (polarization, protection, and substrate for touch electrode), the patent reduces the total number of components that need to be manufactured and assembled. This multi-functional approach simplifies the manufacturing process and increases productivity.
Data Source
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AI summary
Disclosed are a composite polarizing plate-integrated touch sensing electrode and a touch screen panel including the same. Specifically, disclosed are a composite polarizing plate-integrated touch sensing electrode including at least one sensing pattern formed on at least one surface of a composite polarizing plate to which a retarder and a polarizing plate are adhered by a coating method, thereby a thin structure may be implemented, and a touch screen panel including the same.