Capacitive Touch Panel Contactless Operation Control
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Solution Overview
Problem
Current mobile devices with capacitive touch panels primarily support direct touch operations, lacking the capability for contactless operations, which limits the versatility of information processing and user interaction.
Innovation Solution
An information processing apparatus that includes a determining unit to assess whether an application program supports contactless operations, an operation detector to differentiate between direct touch and contactless operations, and a controller with dual modes to manage process execution accordingly, using capacitance threshold levels to detect and process both types of operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the controller functions as a two-dimensional coordinate converter detecting direct touch operations only, then the device complexity is reduced and the operation detection is simplified, but the adaptability and versatility of the device is limited
Solution Approach 1:
The controller dynamically switches between different operational modes (direct touch mode and contactless mode) based on the detected operation type. The controller adjusts its processing logic and threshold settings according to whether it is detecting a direct touch or contactless operation, enabling versatile functionality without requiring separate dedicated hardware for each mode.
Solution Approach 2:
The system changes detection parameters (such as capacitance threshold levels and operation duration criteria) based on the operation mode being processed. By adjusting these parameters dynamically, the same capacitive touch panel can accurately detect both direct touch and contactless operations, expanding adaptability without adding physical components.
2Adaptability or versatility
If the controller supports both direct touch and contactless operations, then the adaptability is improved, but the operation detection complexity increases
Solution Approach 1:
The controller continuously monitors operation characteristics (such as capacitance change patterns, touch duration, and pressure levels) and uses this feedback to automatically differentiate between direct touch and contactless operations. Based on this feedback, the system adjusts its interpretation of the input and selects the appropriate processing mode, making the detection process more accurate and automated.
Solution Approach 2:
The operation detection process is segmented into distinct phases: first detecting the basic capacitive change, then analyzing additional characteristics (such as operation duration or pressure threshold) to determine the operation type. This segmentation allows the system to handle complex differentiation systematically by breaking down the detection process into manageable steps.
3Measurement precision
If the controller uses multiple threshold levels for capacitance detection, then the measurement precision is improved for different operation types, but the device complexity increases
Solution Approach 1:
The controller pre-sets multiple capacitance threshold levels (such as first threshold for direct touch and second threshold for contactless operations) before actual operation detection begins. This preliminary configuration allows the system to quickly and accurately differentiate between operation types during runtime without performing complex real-time calculations, improving measurement precision while keeping the detection process simple.
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
Enables new operation modes where information processing in application programs can be performed through contactless operations, enhancing user interaction and device functionality by allowing hands-free modes and gesture-based interactions.
Implementation Method 1
an operable surface configured to detect changes in capacitance
Data Source
AI summary
[Object] To make information processing based on a given application program operable by contactless operations.[Solution] A display unit forming a capacitive touch panel is provided. Changes in the capacitance values of respective capacitive sensors in the display unit are detected during a contactless operation, and on the basis of such changes in capacitance values, a contactless operation mode (gesture) of the contactless operation, and two-dimensional coordinate information corresponding to the contactless operation mode are detected. Then, execution of information processing corresponding to the detected contactless operation mode and two-dimensional coordinate information from among respective information processing in the currently activated application program is controlled. Thus, information processing in a given application program can be made operable by a contactless operation.