Dual-Chip Touch Panel Layout for Accurate Adjacent Region Sensing
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Solution Overview
Problem
In large-size and high-resolution touch display panels, the use of multiple touch chips to collect touch point coordinates leads to inaccuracies due to differences in chip performance, environment, and driving voltages, especially in adjacency regions, affecting touch accuracy and linearity.
Innovation Solution
A touch display panel design with adjacently arranged display regions connected to multiple touch chips, allowing for dual measurement of touch points by each chip to ensure data consistency and redundancy, correcting errors and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple touch chips are used to collect touch point coordinates in large-size and high-resolution display panels, then the coverage area and resolution are improved, but the measurement precision deteriorates due to different errors between chips in adjacency regions
Solution Approach 1:
The display panel is divided into multiple display regions, each corresponding to a specific touch chip. The touch panel is segmented into first and second display regions with adjacent sub-display regions that are respectively connected to first and second touch chips, allowing each chip to independently measure touch points in its designated region while maintaining overall coverage
Solution Approach 2:
The system uses feedback from both touch chips to correct measurement errors. By obtaining first touch information from the first touch chip and second touch information from the second touch chip for the same adjacency region, the system can identify and correct errors through comparison and integration of both measurements, improving overall measurement precision
2Productivity
If multiple touch chips are used to measure touch points in different regions, then the productivity and driving ability are improved, but the device complexity increases due to coordination between multiple chips
Solution Approach 1:
The display panel is divided into multiple display regions, each corresponding to a specific touch chip. The touch panel is segmented into first and second display regions with adjacent sub-display regions that are respectively connected to first and second touch chips, allowing each chip to independently measure touch points in its designated region while maintaining overall coverage
Solution Approach 2:
Each touch chip is designed to measure touch points not only in its corresponding display region but also in the adjacent display region. The first touch chip measures touch points in both the first display region and the second display region, while the second touch chip measures touch points in both the second display region and the first display region, providing redundant measurement capability that simplifies coordination
3Device complexity
If touch points in adjacency regions are measured by only one chip, then the device complexity is reduced, but the reliability deteriorates due to inability to correct measurement errors
Solution Approach 1:
The measurement system implements different measurement strategies for different regions. In non-adjacency regions, a single chip measures touch points, while in adjacency regions, both touch chips measure the same touch points to provide redundant data for error correction, ensuring high reliability where it is most needed
Solution Approach 2:
The system uses feedback from both touch chips to correct measurement errors. By obtaining first touch information from the first touch chip and second touch information from the second touch chip for the same adjacency region, the system can identify and correct errors through comparison and integration of both measurements, improving overall measurement precision
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 dual measurement approach improves the accuracy and linearity of touch coordinate calculations by ensuring consistent data sources and reducing errors in adjacency regions, enhancing data redundancy and overall touch point measurement precision.
Implementation Method 1
changes in capacitance values corresponding to touch points
Data Source
AI summary
A touch display panel and method for measuring touch points are provided. The coordinate of each of touch points located in a first sub-display region and a second sub-display region can be measured by a first touch chip and a second touch chip respectively. When it is necessary to use the coordinates of the touch points located in the second sub-display region for joint calculation for obtaining the coordinates of the touch points located in the first sub-display region, the data can all be obtained through the first touch chip. When it is necessary to use the coordinates of the touch points located in the first sub-display region for joint calculation for obtaining the coordinates of the touch points located in the second sub-display region, the data can all be obtained through the second touch chip, thereby ensuring the unity of data sources, and increasing data accuracy.