Touch Driving Circuit Encoding for Reduced Sensing Data Volume
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Solution Overview
Problem
The increasing number of touch electrodes in touch display devices leads to higher processing loads and power consumption for touch driving circuits and controllers, resulting in reduced touch sensing speed and increased data transmission times.
Innovation Solution
Implementing encoding techniques to reduce the amount of data transmitted by encoding sensing data from multiple sensing nodes, such as using difference values between adjacent nodes, and optimizing data transmission protocols to minimize the number of transmission cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of touch electrodes is increased to improve touch sensitivity, then touch sensitivity is improved, but the amount of sensing data transmitted increases, causing increased processing load and power consumption
Solution Approach 1:
The patent extracts only the necessary information from the complete sensing data by transmitting only difference values between adjacent sensing nodes instead of all raw sensing data. This extraction approach reduces the quantity of transmitted data while preserving the essential touch information needed for accurate touch coordinate determination.
Solution Approach 2:
The patent changes the parameter representation from absolute sensing values to relative difference values. By encoding the difference between adjacent sensing nodes rather than transmitting each node's complete sensing value, the data is compressed while maintaining the relative spatial information required for touch detection.
2Measurement precision
If the number of touch electrodes is increased to improve touch sensitivity, then touch sensitivity is improved, but processing load and power consumption increase
Solution Approach 1:
The patent extracts only the necessary information from the complete sensing data by transmitting only difference values between adjacent sensing nodes instead of all raw sensing data. This extraction approach reduces the quantity of transmitted data while preserving the essential touch information needed for accurate touch coordinate determination.
Solution Approach 2:
The patent changes the parameter representation from absolute sensing values to relative difference values. By encoding the difference between adjacent sensing nodes rather than transmitting each node's complete sensing value, the data is compressed while maintaining the relative spatial information required for touch detection.
3Measurement precision
If the number of touch electrodes is increased to improve touch sensitivity, then touch sensitivity is improved, but touch sensing speed decreases
Solution Approach 1:
The patent extracts only the necessary information from the complete sensing data by transmitting only difference values between adjacent sensing nodes instead of all raw sensing data. This extraction approach reduces the quantity of transmitted data while preserving the essential touch information needed for accurate touch coordinate determination.
Solution Approach 2:
The patent changes the parameter representation from absolute sensing values to relative difference values. By encoding the difference between adjacent sensing nodes rather than transmitting each node's complete sensing value, the data is compressed while maintaining the relative spatial information required for touch detection.
4Loss of time
If the amount of sensing data is reduced by encoding, then data transmission time is reduced, but data must be decoded by the controller
Solution Approach 1:
The patent changes the parameter representation from absolute sensing values to relative difference values. By encoding the difference between adjacent sensing nodes rather than transmitting each node's complete sensing value, the data is compressed while maintaining the relative spatial information required for touch detection.
Data Source
AI summary
Embodiments of the present disclosure relate to touch display devices, touch driving circuits, touch controllers, and sensing data transmission methods, provide effects of reducing the amount of sensing data transmitted as a touch driving circuit transmits encoded sensing data to a touch controller.