Touch Controller Ternary Binary Data Lines EMI
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch sensing devices face challenges in reducing the number of lines connecting touch controllers and readout integrated circuits, which can lead to increased electromagnetic interference (EMI) noise.
Innovation Solution
A touch sensing device is designed with a first touch controller that transmits and receives data through a clock terminal and multiple input/output terminals, using ternary data for certain communications and binary data for others, and employs a method to synchronize data without a separate clock signal, reducing the need for additional lines and minimizing EMI noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of lines connecting touch controllers and readout integrated circuits is reduced, then device complexity is reduced, but electromagnetic interference noise increases
Solution Approach 1:
The patent combines multiple data transmission functions into a single data line by using ternary data encoding. Instead of separate lines for different data types, the invention merges control and data transmission into one channel by encoding control information within the ternary data signals themselves, thereby reducing the total number of lines while maintaining signal integrity and minimizing EMI.
Solution Approach 2:
The patent changes the data encoding parameter from traditional binary to ternary encoding. This parameter change allows more information to be transmitted per signal cycle, reducing the number of required transmission lines. The ternary encoding scheme represents data using three states (0, 1, 2) instead of two, enabling more efficient data compression and transmission through fewer physical lines.
2Productivity
If ternary data transmission is used through clock terminal and input/output terminals, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent makes the existing clock terminal and input/output terminals multi-functional by using them for both traditional binary data transmission and the new ternary data transmission. The controller can dynamically switch between transmission modes or use both simultaneously on the same physical infrastructure, thereby improving data transmission efficiency without requiring additional dedicated hardware terminals or channels.
3Device complexity
If binary data transmission is used through remaining input/output terminals, then device complexity is reduced, but data transmission efficiency decreases
Solution Approach 1:
The patent segments data transmission into two parts: control information transmitted through the clock terminal using ternary encoding, and payload data transmitted through input/output terminals using binary encoding. This segmentation allows each channel to be optimized for its specific function - the clock terminal handles synchronization and control with ternary's higher information density, while I/O terminals handle bulk data with binary's simplicity and reliability.
Data Source
AI summary
Disclosed herein is a touch sensing device including a first touch controller configured to transmit and receive data, wherein the first touch controller includes a clock terminal and a plurality of input/output terminals, and ternary data is transmitted and received through the clock terminal and at least two terminals among the plurality of input/output terminals of the first touch controller, and binary data is transmitted through the remaining input/output terminals.