Touch Panel Input Detection for Electrode-Based Operating Parts
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Solution Overview
Problem
Existing electrostatic capacitance type touch panels struggle with precise input detection when using input devices with buttons or pads, as the electrostatic capacitance changes are not accurately detected.
Innovation Solution
An electronic apparatus equipped with an input device having electrodes that change potential upon operation, combined with a touch panel and a detection system that uses a processor to detect operations based on electrostatic capacitance changes, employing mathematical distribution models and non-negative matrix factorization to enhance detection precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If input is performed by operating physical buttons or pads connected to the touch panel, then input functionality is provided, but detection precision of the touch panel decreases
Solution Approach 1:
The invention separates the input device into distinct components: electrodes that change potential upon operation and the touch panel that detects electrostatic capacitance changes. This segmentation allows the touch panel to detect input device operations through electrostatic field changes rather than direct contact, resolving the contradiction between providing input functionality and maintaining detection precision.
Solution Approach 2:
The invention introduces an intermediary mechanism where electrodes connected to operating parts serve as mediators between the physical operation and the touch panel detection. These electrodes transmit operational information through electrostatic capacitance changes to the touch panel, enabling indirect detection that preserves precision while maintaining ease of operation.
2Measurement precision
If electrodes are added to detect operating part operations, then detection capability is improved, but device complexity increases
Solution Approach 1:
The touch panel serves multiple functions: it acts as both the display interface and the detection mechanism for operating part operations. The electrodes are integrated into the existing input device structure, allowing the same component to provide both input functionality and detection capability, thereby reducing overall device complexity while improving detection.
Solution Approach 2:
The invention merges the detection function into the existing touch panel infrastructure rather than adding separate detection hardware. The electrostatic capacitance detection capability of the touch panel is utilized to detect operations on operating parts, combining multiple functions into a single integrated system that reduces complexity.
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
Improves the precision of input detection by accurately distinguishing operations on the touch panel, even when using input devices with buttons or pads, through advanced signal processing and modeling techniques.
Implementation Method 1
the touch panel is configured to detect a value of a parameter relating to an electrostatic capacitance formed between a region of the touch panel corresponding to the electrode and the electrode and changing in accordance with a change in potential of the electrode
Data Source
AI summary
An electronic apparatus can be equipped with an input device provided with an electrode which changes in potential by an operating part being operated. The apparatus includes: a touch screen provided with a display part and a touch panel; and a processor configured to detect operation at the operating part. The touch panel detects a value of a parameter relating to an electrostatic capacitance formed between the touch panel and the electrode and changing in accordance with a change in potential of the electrode. The processor is configured to detect operation at the operating part at any timing based on a first parameter value expressed by the value of the parameter detected by the touch panel when no operating part is being operated, and a second parameter value expressed by the value of the parameter detected by the touch panel after the first parameter value is detected.