Touch Driving Apparatus Charge Discharge Optimization
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Solution Overview
Problem
Touch control systems face challenges in achieving low noise and low power consumption during touch detection, which affects detection accuracy and increases power costs.
Innovation Solution
A touch driving apparatus and method that utilizes a Code Division Multiple Access (CDM) code matrix to modularize output stage circuits, allowing for efficient charge-discharge processes between driving electrodes, reducing power consumption and improving detection accuracy by minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional touch detection methods are used, then detection coverage is achieved, but power consumption increases and noise is generated
Solution Approach 1:
The driving electrodes are divided into multiple groups (first driving electrode group, second driving electrode group, etc.) that can be independently controlled. This segmentation allows the system to activate only specific electrode groups for detection, reducing overall power consumption while maintaining detection coverage through strategic group selection.
Solution Approach 2:
The patent implements periodic charge-discharge cycles of driving electrodes in a structured sequence. By periodically charging and discharging electrode groups in alternating patterns, the system achieves detection functionality while minimizing continuous power consumption through duty cycle management.
2Measurement precision
If driving signals are applied to all driving electrodes simultaneously, then detection coverage is improved, but noise and power consumption increase
Solution Approach 1:
Driving electrodes are segmented into multiple independent groups that can be activated separately. This allows the system to apply driving signals to only the necessary electrode groups for current detection, avoiding simultaneous activation of all electrodes which would generate noise and increase power consumption.
Solution Approach 2:
Different electrode groups are activated based on local detection needs. The controller selectively activates specific driving electrode groups corresponding to the region where touch input is detected, applying driving signals locally rather than globally, thereby reducing noise and power consumption while maintaining detection accuracy.
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 solution reduces power consumption and enhances detection accuracy by optimizing the charge-discharge process between driving electrodes, thereby improving the efficiency of touch control systems.
Implementation Method 1
the first driving electrode group is expected to discharge the first driving electrode group, and the second driving electrode group is expected to charge the second driving electrode group
Implementation Method 2
controlling utilizing power from the first driving electrode group to charge the second driving electrode group
Data Source
AI summary
A touch driving apparatus, a touch control apparatus and a touch driving method are provided. The touch driving apparatus includes at least one output module. Each output module comprises at least two output stage circuits, each having an output terminal configured to output a driving signal to a connected driving electrode. The method includes: for each output module, determining a first and a second output stage circuit groups in the current driving time period according to a CDM code matrix. A first driving signal group corresponding to the first output stage circuit group is expected to discharge a first driving electrode group, and a second driving signal group corresponding to the second output stage circuit group is expected to charge a second driving electrode group; and controlling utilizing power from the first driving electrode group to charge the second driving electrode group, in response to the determination.