Display Touch Sensor Mesh Structure for Reduced Light Reflection
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Solution Overview
Problem
Existing display devices with touch sensors face challenges in improving visibility and simplifying the cross-sectional structure of panels, which affects processing properties.
Innovation Solution
A display device with a touch sensor featuring a conductive pattern layer forming first and second sensing electrodes, including edge portions and disconnection areas, and a cover layer that overlaps these areas, with cells and bridges arranged in a mesh structure to enhance visibility and simplify the panel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous conductive pattern layer is used for sensing electrodes, then electrical connectivity is ensured, but external light reflection increases and visibility deteriorates
Solution Approach 1:
The conductive pattern layer is divided into multiple discrete conductive patterns arranged in a mesh structure, with intentional disconnection areas between them. This segmentation reduces continuous light reflection surfaces while maintaining electrical connectivity through the grid arrangement, directly resolving the contradiction between connectivity and visibility.
2Reliability
If multiple layers are added to the panel structure to improve touch sensing, then sensing performance increases, but the cross-sectional structure becomes complex and processing properties deteriorate
Solution Approach 1:
The patent combines the touch sensing function with the existing display panel structure by integrating the conductive pattern layer into the panel's existing layers. Rather than adding separate touch sensor layers, the sensing electrodes are formed within the display panel's conductive layers, simplifying the overall cross-sectional structure while maintaining sensing performance.
3Reliability
If the conductive pattern layer covers the entire sensing area, then touch sensing coverage is maximized, but visibility and processing properties deteriorate due to complex structure
Solution Approach 1:
The conductive pattern layer is designed with spatially varying properties: conductive patterns are present in sensing regions for touch detection, while disconnection areas are created in specific locations to improve visibility. This local differentiation allows the structure to optimize both sensing coverage and manufacturing ease in different regions.
Data Source
AI summary
A display device includes a display part formed on a base layer, the display part including a plurality of pixels, and a sensor part disposed on the display part, the sensor part including a conductive pattern layer and a cover layer disposed on the conductive pattern layer. The conductive pattern layer forms a first sensing electrode and a second sensing electrode, and includes an edge portion forming a disconnection area. The cover layer includes a first cover layer overlapping the disconnection area in a plan view.