Touch Panel Dial Height Separation for Signal Clarity
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Solution Overview
Problem
In electronic devices with a touch panel and a dial, it is difficult to separate touch operation signals from dial signals due to overlapping signal peaks at the peripheral edge, making it challenging to determine the origin of signal peaks and requiring a method to distinguish between the two.
Innovation Solution
The electronic device incorporates an electrostatic-type touch panel with a rotatable annular dial part positioned higher than the touch surface, allowing only touch operations inside the peripheral edge and enabling clear separation of touch and dial signals by positioning the dial part above the touch surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dial part is positioned at the same level as the touch surface, then the device structure is simpler, but the touch operation signal and dial signal overlap making it difficult to separate the signals
Solution Approach 1:
The dial part is positioned higher than the touch surface in the height direction (Z-axis), transitioning from a two-dimensional planar arrangement to a three-dimensional spatial arrangement. This vertical separation creates distinct detection zones: the touch panel detects signals from the touch surface level while the dial part generates signals at a higher level, enabling clear signal separation without complex structural modifications
2Measurement precision
If the dial part is positioned higher than the touch surface, then touch and dial signals can be easily separated, but the device structure becomes more complex
Solution Approach 1:
The device structure is segmented into distinct functional zones: the touch panel occupies the lower level for touch operations, while the dial part is positioned at a higher level for rotational operations. This spatial segmentation creates clear separation between touch signals detected at the touch surface level and dial signals generated at the elevated dial level, improving measurement precision while maintaining structural simplicity through functional zonation
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
This configuration allows for easy identification and separation of touch operation signals from the touch panel signals, ensuring accurate touch position detection and preventing dial signal interference.
Implementation Method 1
The touch panel 910 is an electrostatic-type touch panel. The touch panel 910 detects change in electrostatic capacitance in a case where a finger of a user gets closer to the touch panel 910.
Implementation Method 2
electrostatic capacitance between the touch panel 910 and the dial 920 varies depending on a position of the dial 920. Consequently, the touch panel 910 outputs a signal (dial signal) that is based on such changes in electrostatic capacitance.
Data Source
AI summary
Signals based on touch operation can be easily separated from a signal output by a touch panel. A peripheral edge of a touch panel and a touch surface is surrounded by a dial part. The dial part is located at a position higher than a position of the touch surface.