Segmented Electrode Blocks for Thin Display Panels
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Solution Overview
Problem
Conventional electronic devices with displays face challenges in integrating supplemental features like touch sensing, touch pressure sensing, and tactile feedback without compromising display quality, often resulting in increased thickness and weight due to separate components, and issues like parasitic capacitance that cause visual defects.
Innovation Solution
A display panel configuration with segmented electrode blocks over the display area, where transparent electrode blocks communicate with a touch driver via common signal lines, forming a planar surface with a lower planarization layer to minimize thickness and weight, and integrate touch sensing functionality without disrupting display operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate touch panel and display panel are used, then touch sensing functionality is provided, but thickness and weight of the display device increase
Solution Approach 1:
The patent combines the touch sensing functionality and display functionality into a single integrated display panel. The touch sensing lines and display pixel electrodes share the same substrate and layer structure, eliminating the need for a separate touch panel. This merging approach maintains touch sensing versatility while reducing the overall weight and thickness of the display device.
2Adaptability or versatility
If separate touch panel and display panel are used, then touch sensing functionality is provided, but the display device becomes thicker
Solution Approach 1:
The patent integrates touch sensing lines and display pixel electrodes within the same panel structure, sharing common substrates and layer configurations. This consolidation eliminates the need for stacked separate panels, thereby reducing the overall thickness while maintaining full touch sensing functionality.
3Adaptability or versatility
If conductive lines are added for touch sensing, then touch sensing functionality is integrated, but parasitic capacitance is generated causing visual defects
Solution Approach 1:
The patent extracts the problematic conductive lines that cause parasitic capacitance and places them in a separate lower layer beneath the display pixel electrodes. This spatial separation removes the harmful electromagnetic interaction while preserving the touch sensing functionality, thereby eliminating visual defects such as line dim and moiré effects.
Solution Approach 2:
The patent resolves the parasitic capacitance issue by transitioning the conductive lines to a different spatial dimension - specifically, placing them in a lower layer beneath the pixel electrodes rather than in the same plane. This vertical separation in the layer structure eliminates the harmful capacitive coupling while maintaining touch sensing operation.
4Ease of manufacture
If components are integrated within display panel stacks, then fewer parts and manufacturing steps are needed, but operation of display panel becomes complicated
Solution Approach 1:
The patent segments the display panel into distinct functional layers with clear separation of responsibilities. The lower layer contains conductive lines for touch sensing, while the upper layer contains pixel electrodes for display. This segmentation simplifies the operational control of each layer while maintaining manufacturing efficiency, as each layer can be addressed independently without interfering with the other.
Data Source
AI summary
A display of an electric device includes a plurality of separated transparent electrode blocks, which are configured to provide one or more of supplemental features such as touch recognition. Signal paths between the transparent electrode blocks and the driver for the supplemental feature are implemented with a plurality of conductive lines placed under positioned under one or more planarization layers. The conductive lines implementing the signal paths are routed across the display area, directly toward a non-display area where drive-integrated circuits are located.