Touch System Modulation Signal Transmission Method
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Solution Overview
Problem
Conventional touch systems face inefficiencies in signal transmission due to time division methods, resulting in insufficient detection time for both finger and stylus interactions, which affects user experience.
Innovation Solution
A signal transmission method that employs a modulation signal as both a driving and uplink signal in a touch system, allowing for a time division mode where the touch device provides a modulation signal to electrode units and receives a downlink signal, eliminating the need for time-sharing and allocating more time for each working period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch device divides a frame into multiple working periods to detect finger and stylus separately, then both detection functions are achieved, but the detection time for each working period becomes insufficient
Solution Approach 1:
The patent combines the driving signal and uplink signal into a single modulation signal that is transmitted through the electrode units. This merging eliminates the need for separate time slots for driving and uplink communication, thereby increasing the detection time available for each working period while maintaining both finger and stylus detection capabilities.
Solution Approach 2:
The modulation signal serves multiple functions simultaneously: it acts as both the driving signal for the electrode units and the uplink signal for communication with the stylus. This multi-functionality reduces the number of separate signaling operations needed, freeing up time for detection operations within each working period.
2Reliability
If the touch device uses time division method to transmit driving signal and uplink signal separately, then signal transmission is achieved, but the overall transmission efficiency is reduced
Solution Approach 1:
The patent merges the driving signal and uplink signal into a single modulation signal that performs both functions simultaneously. This combination eliminates the time overhead associated with sequential signal transmission, thereby improving transmission efficiency while maintaining reliable communication with the stylus and proper electrode unit operation.
Solution Approach 2:
By using a continuous modulation signal that serves dual purposes, the system eliminates idle time periods between driving signal transmission and uplink signal transmission. This continuous useful action improves overall transmission efficiency by ensuring that the electrode units are constantly engaged in productive operations rather than switching between different signal types.
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
This approach enhances user experience by increasing detection time for both finger and stylus interactions, improving the overall performance and responsiveness of the touch system.
Implementation Method 1
providing a modulation signal to at least one of the first electrode units for being used as a driving signal and an uplink signal transmitted to the input device
Implementation Method 2
the touch device sends a driving signal to the electrode units, and then samples the electrode units to perform capacitive sensing to capture the touch information
Data Source
AI summary
A touch system has a touch device and an input device. The touch system executes a first mode and a second mode at different times. In the first mode, the touch device transmits a modulation signal to drive the touch electrodes and to be used as an uplink signal. The input device receives the modulation signal. In the second mode, the touch device receives the downlink signal from the input device. Thus, the touch device does not have to transmit the driving signal and the uplink signal at different times. Then the time is saved for the rest work periods so that every work periods get longer length of time.