Touch Display Panel Segmentation for Precision and Cost Reduction
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Solution Overview
Problem
Existing embedded touch display apparatuses, especially large-sized ones, face challenges such as high costs, large frame widths, and reduced touch detection precision due to the large number of touch channels and driver chips required.
Innovation Solution
The proposed touch display apparatus divides the touch display panel into multiple independent touch areas, each containing a plurality of touch structures. This configuration allows for improved touch detection precision, reduced costs, and a simplified architecture by minimizing the number of touch signal lines and driver chips needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of touch channels and driver chips is increased to cover the entire touch display panel, then the touch detection coverage is improved, but the cost and device complexity increase significantly
Solution Approach 1:
The touch display panel is divided into multiple touch areas, with each touch area containing multiple touch structures. Each touch structure includes multiple first touch electrodes and multiple second touch electrodes that are insulated from each other. This segmentation allows the touch detection function to be distributed across multiple independent touch structures, reducing the need for a large number of driver chips while maintaining comprehensive touch detection coverage.
Solution Approach 2:
Each touch structure serves multiple functions: it detects touch events in its local area, contributes to overall touch detection precision through the array of touch structures, and enables multi-finger touch detection. The first and second touch electrodes within each structure work together to detect touches from different directions, making each touch structure a multi-functional unit that reduces the total number of components needed.
2Measurement precision
If the number of touch channels is increased to improve touch detection precision, then the touch detection precision is improved, but the frame width and cost increase
Solution Approach 1:
The touch panel is segmented into multiple touch areas with multiple touch structures per area. Each touch structure contains multiple first touch electrodes arranged along a first direction and multiple second touch electrodes arranged along a second direction. This segmentation allows touch detection precision to be improved through the distributed array of touch structures rather than increasing the number of touch channels per structure, thereby reducing frame width requirements.
Solution Approach 2:
Instead of increasing touch channels in a single dimension, the patent uses multiple directions (first direction and second direction) for arranging touch electrodes within each touch structure. This multi-dimensional arrangement improves touch detection precision without requiring proportional increases in frame width, as the precision gain comes from the geometric arrangement rather than channel quantity alone.
3Reliability
If multiple driver chips are used to handle all touch structures, then the touch detection capability is improved, but the cost and architectural complexity increase
Solution Approach 1:
The touch display panel is divided into multiple touch areas, with each touch area containing multiple independent touch structures. Each touch structure includes multiple first touch electrodes and multiple second touch electrodes that are insulated from each other. This segmentation allows the system to achieve comprehensive touch detection capability through the distributed arrangement of touch structures rather than relying on a large number of driver chips, thereby simplifying the overall architecture.
Solution Approach 2:
Each touch structure is designed to be self-contained with its own first and second touch electrodes that can independently detect touch events. The touch structures work autonomously within their respective touch areas, reducing the coordination complexity between multiple driver chips and simplifying the overall system architecture while maintaining reliable touch detection capability.
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 solution enhances touch detection precision, particularly for large-sized displays under multi-finger touch, while reducing costs and simplifying the architecture by minimizing the number of touch channels and driver chips. This also leads to improved refresh rates and display effects.
Implementation Method 1
The capacitive touch includes out-cell touch and embedded touch. The embedded touch is also referred to as in-cell touch
Data Source
AI summary
An example touch display apparatus includes a touch display panel including one or more touch areas. Each touch area can include touch structures, where each touch structure includes first touch electrodes arranged along a first direction and second touch electrodes arranged along a second direction. Each first touch electrode can include first electrode blocks arranged along the second direction. Each second touch electrode can include second electrode blocks arranged along the first direction. The display apparatus can further include at least one touch driver chip, where one touch driver chip is electrically connected to a touch signal line connected to touch structures in one touch area.