Capacitive Touch Controller Channel Configuration
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Solution Overview
Problem
Existing capacitance detection methods for touch screens are inflexible and inefficient due to varying sizes and application scenarios, leading to poor adaptation and low detection efficiency across different configurations and channel setups.
Innovation Solution
A capacitance detection method and device using a capacitive touch controller chip that pre-configures detection channels with specific activating sequences, allowing for flexible channel settings and efficient detection by activating channels sequentially based on pre-defined information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a specific design is proposed for every demand in response to diversified demands, then the detection accuracy for specific applications is improved, but the design complexity and production costs increase
Solution Approach 1:
The patent implements a universal capacitance detection method that can adapt to different touch screen sizes, applications, and channel configurations through software configuration rather than hardware redesign. The system uses a unified detection architecture with configurable parameters (number of channels, detection timing, channel activation sequences) that can be adjusted to meet diverse application requirements, eliminating the need for separate designs for each application scenario.
Solution Approach 2:
The patent changes detection parameters (number of detection channels, detection timing, channel activation sequences) to adapt to different application scenarios. By allowing dynamic configuration of these parameters, the system can optimize detection accuracy for specific applications without requiring structural redesign, thus resolving the contradiction between measurement precision and device complexity.
2Ease of manufacture
If a unified capacitance detection method is used for all applications, then the design and production costs are reduced, but the adaptation to diversified application scenarios deteriorates
Solution Approach 1:
The patent creates a unified detection architecture that serves multiple application scenarios through software configuration. The system can detect capacitance values for different numbers of channels (e.g., 4-channel, 8-channel, 12-channel configurations) and different detection timings without requiring hardware changes, thus achieving both cost reduction and high adaptability.
Solution Approach 2:
The patent introduces dynamic configurability to the unified detection method, allowing the system to adapt its behavior based on application requirements. The detection parameters (channel count, timing, activation sequences) can be dynamically adjusted through software, enabling the same hardware to serve diverse applications effectively.
3Ease of operation
If the detection channel configuration is fixed, then the device complexity is reduced, but the flexibility in setting detection channels deteriorates
Solution Approach 1:
The patent implements pre-configuration of detection channel information and activating sequences before actual detection begins. The system stores multiple preset channel configurations that can be selected based on application needs, allowing flexible channel setup without requiring complex real-time configuration during operation.
Solution Approach 2:
The patent enables dynamic channel configuration through software settings, allowing users to flexibly set the number of detection channels and their activation sequences according to specific application requirements. This dynamic configurability is achieved through a unified architecture that handles parameter changes without increasing fundamental device complexity.
4Productivity
If traditional capacitance detection method is used without pre-configuration, then the detection process is simpler, but the detection efficiency deteriorates
Solution Approach 1:
The patent performs pre-configuration of detection channels and activating sequences before the actual detection process. By preparing channel configurations, detection timing, and activation sequences in advance, the system eliminates runtime configuration overhead and optimizes detection execution, thereby improving detection efficiency despite the added pre-processing step.
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
Enhances detection efficiency and reduces costs by allowing for customizable detection channel configurations according to specific requirements, improving flexibility and accuracy across diverse touch screen applications.
Implementation Method 1
since a voltage is generated between a fixed capacitance and the capacitance of fingers to earth (that is, a ground capacitor in the channel by means of fingers based on earth), performing charging and discharging on the capacitor, thereby maximally accumulating effective charges of the capacitor from the fingers to earth and forming a capacitance voltage
Data Source
AI summary
A capacitance detection method based on a capacitive touch controller chip includes: setting configuration information of a plurality of detection channels, the configuration information includes information of activating sequence and pre-configuration information of a plurality of respective detection channels (201); pre-configuring the plurality of respective channels before detection in accordance with the pre-configuration information (202); activating a first detection channel in accordance with the information of activating sequence, and detecting a capacitance value generated by touch of a user in the currently activated channel (203); and activating a next channel in accordance with the information of activating sequence, and continuing to perform detection on a capacitance value of the next channel until completing the detection of capacitance values of all detection channels (204). The method can enhance the flexibility of setting detection channels.