Touch Controller Master-Slave Protocol for Noise Filtering
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Solution Overview
Problem
Conventional touch display devices lack an accurate communication protocol between the touch driving device and the touch controller, leading to inefficient data transmission and longer processing times, as well as noise in data transmission, which affects the accuracy of touch detection and input processing.
Innovation Solution
A master-slave communication system is implemented, where the touch driving device operates as a touch slave and the touch controller operates as a touch master, using a filter unit with a sampler and count comparator to filter noise and accurately transmit sensing data, thereby enhancing communication efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional touch display devices use traditional communication methods between touch driving device and touch controller, then basic touch functionality is maintained, but data transmission efficiency deteriorates and processing time increases
Solution Approach 1:
The patent changes the communication parameters by implementing a dedicated master-slave communication protocol between the touch controller (master) and touch driving device (slave). This protocol optimizes data transmission parameters including signal levels, timing sequences, and data formats, enabling faster and more efficient communication compared to conventional methods.
Solution Approach 2:
The patent introduces a filter unit as an intermediary component between the touch driving device and touch controller. This filter unit processes and conditions the sensing data before transmission, removing noise and ensuring data integrity, which streamlines the communication process and reduces retransmission needs.
2Measurement precision
If conventional touch display devices transmit sensing data without filtering, then data transmission is simple, but noise in transmitted data affects touch detection accuracy
Solution Approach 1:
The filter unit serves as an intermediary that cleans the sensing data by removing noise components before the data is transmitted to the touch controller. This intermediate processing step ensures high measurement precision for touch detection while maintaining a relatively simple overall system architecture.
Solution Approach 2:
The filter unit extracts and removes the noise component from the sensing data, separating the useful touch information from unwanted interference. This extraction process improves touch detection accuracy by ensuring that only clean, reliable data is used for touch coordinate calculation.
3Reliability
If touch controller stops ongoing processes to control touch driving device, then accurate touch control is achieved, but communication efficiency deteriorates
Solution Approach 1:
The master-slave communication protocol establishes predetermined communication sequences and timing relationships before actual touch control operations begin. The touch controller (master) pre-configures communication parameters and maintains continuous data flow, eliminating the need to interrupt ongoing processes for control operations.
Solution Approach 2:
The communication system maintains continuous data transmission between the touch driving device and touch controller without interruptions. The master-slave protocol ensures that control commands and sensing data are exchanged continuously, allowing the touch controller to maintain accurate control while avoiding process stoppage.
Data Source
AI summary
Disclosed are a touch display device, a touch system, a touch master, and a communication method and, more particularly, are a touch display device, a touch system, a touch master, and a communication method which can provide a communication protocol and a communication interface based on a master-slave system in which a touch driving device operates as a touch slave and a touch controller operates as a touch master. Communication between the touch driving device and the touch controller can be accurately and rapidly performed and data transmission efficiency can increase.