Touch Panel Z-Axis Detection Error Prevention
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Solution Overview
Problem
Existing touch panel input devices often recognize Z-axis manipulations as components of X-axis and Y-axis movements, leading to erroneous operations, as they detect inputs in all three directions without distinguishing between contact and proximity states.
Innovation Solution
An input device with a sensor and coordinates detection unit that only recognizes Z-axis coordinates after contact is detected, preventing erroneous detection during X and Y-axis inputs by invalidating hover coordinates until contact is made.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch panel detects inputs in all three directions (X, Y, and Z axes) simultaneously, then the device can recognize more types of user manipulations, but erroneous operations occur because Z-axis manipulations are mistakenly recognized as components of X-axis and Y-axis movements
Solution Approach 1:
The patent segments the detection process into distinct phases: a first detection period where only X and Y coordinates are detected, and a second detection period where Z coordinates are detected. This temporal segmentation allows the system to handle different types of manipulations in separate time windows, preventing cross-contamination of detection data and eliminating erroneous operations caused by simultaneous multi-axis detection.
Solution Approach 2:
The patent implements dynamic switching between different detection modes based on the current operational state. The control unit dynamically transitions between a first state (detecting only X and Y coordinates) and a second state (detecting Z coordinates), allowing the system to adapt its detection capabilities to the specific manipulation being performed, thereby maintaining both versatility and accuracy.
2Ease of operation
If the device recognizes only contact and non-contact states without distinguishing Z-axis movements, then the input mechanism remains simple, but the user must make many touch manipulations to select and perform desired functions
Solution Approach 1:
The patent introduces the Z-axis dimension to the traditional two-dimensional touch panel interaction model. By detecting manipulation amounts in the Z-axis direction and mapping them to function selections, the system enables users to access multiple functions through vertical movements rather than requiring multiple sequential touches on the X-Y plane, significantly improving manipulation efficiency.
Solution Approach 2:
The patent implements preliminary detection of manipulation intent through Z-axis movements before executing the corresponding function. The system detects the direction and magnitude of Z-axis manipulations in advance, preps the appropriate function for selection, and then executes it when the manipulation is completed, allowing users to efficiently navigate through multiple functions without intermediate confirmation steps.
Data Source
AI summary
An input device is equipped with a touch panel for detecting an input, a coordinates acquiring unit for detecting input coordinates which are coordinates of the input detected by the touch panel, and a pull manipulation judging unit which, when an input to an input detection surface which is a surface on which the touch panel is placed, makes effective the Z coordinate in the direction perpendicular to the input detection surface among the input coordinates detected by the coordinates acquiring unit.