Touch Detection Module With Noise-Adaptive Driving Modes
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Solution Overview
Problem
Existing touch detection modules in display devices struggle to efficiently adapt to changes in usage states and environments, leading to reduced touch detection accuracy and increased power consumption.
Innovation Solution
A touch detection module with a touch driving circuit that adjusts its driving mode based on noise levels, object detection results, and touch position, incorporating features like analog-to-digital conversion, signal deviation detection, and data compensation to enhance accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch detection module uses a fixed driving mode, then the device structure is simple, but the touch detection accuracy decreases when environmental noise or usage conditions change
Solution Approach 1:
The touch driving circuit dynamically switches between first and second driving modes based on detected usage conditions or environmental noise levels. The mode setting unit changes the driving mode according to detected conditions, allowing the system to adapt to varying environments and maintain high touch detection accuracy without requiring a completely complex reconfigurable circuit design.
Solution Approach 2:
The system changes operational parameters by switching between different driving modes with distinct signal characteristics. The first driving mode uses one set of signal parameters while the second driving mode uses different parameters, allowing the system to optimize performance for different environmental conditions without physical hardware changes.
2Measurement precision
If the touch detection module continuously operates in high-accuracy mode, then touch detection accuracy is maintained, but power consumption increases
Solution Approach 1:
The touch driving circuit dynamically adjusts its operating mode based on actual usage conditions. When environmental noise is low or usage conditions are stable, the system can operate in a more power-efficient mode while maintaining adequate accuracy. The mode setting unit enables transitions between power-optimized and accuracy-optimized modes based on real-time conditions.
Solution Approach 2:
The system changes signal driving parameters between modes to balance power consumption and accuracy. The first driving mode may use parameters optimized for accuracy while the second mode uses parameters optimized for lower power consumption, allowing the system to adapt its energy usage to actual operational needs rather than continuously operating at maximum performance.
3Adaptability or versatility
If the touch detection module does not switch driving modes, then the control logic is simple, but the adaptability to different usage states and environments decreases
Solution Approach 1:
The touch driving circuit incorporates dynamic mode switching capability that allows it to adapt to different environmental noise levels and usage conditions. The mode setting unit provides the necessary control logic to transition between driving modes based on detected conditions, enabling environmental adaptability without requiring a completely complex reconfigurable architecture.
Solution Approach 2:
The touch driving circuit is designed to perform multiple functions through mode switching. The same hardware circuit can operate in different driving modes to handle various usage scenarios and environmental conditions, making the system universally adaptable without requiring separate dedicated circuits for each condition.
4Reliability
If the touch detection module uses noise-insensitive driving mode in noisy environments, then false touch detections are reduced, but legitimate touch signals may be missed
Solution Approach 1:
The touch driving circuit dynamically selects the appropriate driving mode based on detected environmental noise levels and usage conditions. When environmental noise is high, the system switches to a mode that reduces false detections from noise. When usage conditions indicate active touch interaction, the system can switch to a more sensitive mode to ensure legitimate touches are detected, allowing the reliability and sensitivity to be optimized for current conditions.
Solution Approach 2:
The mode setting unit uses feedback from environmental noise detection and usage condition detection to automatically adjust the driving mode. This feedback mechanism allows the system to respond to changing conditions and switch between modes that prioritize false detection reduction versus touch signal sensitivity based on what the environment and usage patterns indicate.
Data Source
AI summary
A touch detection module includes a plurality of driving electrodes that extends in parallel; a plurality of sensing electrodes that intersect the plurality of driving electrodes; and a touch driving circuit that supplies touch driving signals to the plurality of driving electrodes and detects touch position coordinates by detecting touch sensing signals through the plurality of sensing electrodes. The touch driving circuit changes a driving mode according to at least one of a noise level, an object detection result, or a touch position detection result.