3D Input Display Operation Detection for Overlapping Touch Areas
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Solution Overview
Problem
Existing input display devices with three-dimensional operation portions face challenges in accurately detecting operations when the detection areas of multiple operation portions overlap or are arranged closely together, leading to reduced detection accuracy.
Innovation Solution
The input display device employs a capacitive touch sensor to detect finger position and distance in a three-dimensional space, combined with analysis of finger movement direction, to differentiate between adjacent three-dimensional operation portions by setting threshold values for capacitance differences and determining the intended operation based on finger distance and direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple three-dimensional operation portions are arranged closely together to save space, then the device compactness is improved, but the detection accuracy deteriorates due to overlapping detection areas
Solution Approach 1:
The patent introduces a third dimension (depth/distance from touch sensor) to differentiate between operation portions. The distance detector measures the distance from the touch sensor to the operation object, and the determiner uses this depth information to identify which operation portion is being operated when detection areas overlap in the two-dimensional plane. This dimensional addition resolves the contradiction by enabling accurate detection in compact arrangements.
2Ease of operation
If the detection area of each operation portion is enlarged to improve operability, then the ease of operation is improved, but the detection accuracy deteriorates when portions are arranged adjacent to each other
Solution Approach 1:
By utilizing the distance dimension (Z-axis) in addition to the two-dimensional touch sensor plane, the system can determine which operation portion is being operated based on the measured distance to the operation object. This allows each operation portion to have a larger detection area while maintaining accuracy through depth-based differentiation.
3Ease of operation
If three-dimensional operation portions with different heights are used to improve identification, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The operation portions themselves serve as the identification mechanism through their varying distances from the touch sensor. The distance detector automatically measures these distances, and the determiner uses this information to identify which portion is being operated. This self-identifying mechanism eliminates the need for additional complex identification systems while improving ease of operation.
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 approach allows for accurate detection of the intended three-dimensional operation even when portions are closely arranged, enhancing user interface precision and reducing operational errors.
Implementation Method 1
a touch sensor of a capacitive type mounted on the display
Data Source
AI summary
An input display device that includes: a display configured to display an image; a touch sensor of a capacitive type mounted on the display; a plurality of three-dimensional operation portions mounted over the touch sensor and capacitively coupled to the touch sensor; a distance detector configured to detect a distance, that is the distance from an operation object to the touch sensor, of the three-dimensional operation portion receiving an operation by the operation object among the three-dimensional operation portions; a position detector configured to detect a position of the operation object, in response to the operation to the three-dimensional operation portion by the operation object; and a determiner configured to determine the three-dimensional operation portion being operated by the operation object, among the three-dimensional operation portions, based on the distance detected by the distance detector and the position detected by the position detector.