Double-Sided Touch Sensing Structure With Deformable Suspension
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Solution Overview
Problem
Conventional touch input devices are limited in usability as they can only recognize inputs on a single touch surface, lacking the ability to effectively handle double-sided touch inputs.
Innovation Solution
A touch input device design featuring a first and second touch sensing member with opposing touch surfaces, a deformable suspension, and a force sensor that outputs signals based on the bending direction, allowing for bidirectional touch recognition and implementation of a double-sided touch input structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single touch surface configuration is used, then the device structure is simple, but the usability and input recognition capability are limited
Solution Approach 1:
The touch input device is segmented into two separate touch sensing members (first and second touch surfaces) positioned on opposite sides of the suspension. Each touch surface can be independently touched, allowing the device to recognize touches from either side. This segmentation enables bidirectional touch input capability while maintaining a relatively simple overall structure through the shared suspension mechanism.
2Ease of operation
If a double-sided touch structure is implemented, then the usability and input recognition are improved, but the device complexity increases
Solution Approach 1:
The first and second touch sensing members are merged through the common suspension mechanism. The suspension serves as a shared structural element that connects both touch surfaces and provides the force sensing capability for both sides. This merging approach allows double-sided touch functionality while avoiding the need for completely separate sensing systems, thereby controlling device complexity.
Solution Approach 2:
The suspension serves multiple functions: it mechanically connects the first and second touch sensing members, provides deformability in response to touches from either side, and houses the force sensor that detects bending in both directions. This multi-functionality of the suspension enables the device to achieve enhanced usability without proportionally increasing structural complexity.
3Measurement precision
If a rigid connection between touch surfaces is used, then structural stability is maintained, but touch direction recognition capability is lost
Solution Approach 1:
The suspension is designed to be deformable rather than rigid, allowing it to dynamically respond to touches from either the first or second touch surface. When touched, the suspension bends in the direction of the applied force, and this dynamic deformation is detected by the force sensor to determine touch direction. The suspension maintains sufficient structural stability to support both touch surfaces while enabling the necessary flexibility for accurate direction recognition.
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 precise recognition of touch position, intensity, and movement direction on both sides, enhancing usability by facilitating double-sided touch inputs and improving the overall input experience.
Implementation Method 1
A suspension 20 is provided to be deformable in response to a touch direction when a touch is applied to one of the first touch sensing member 11 and the second touch sensing member 12
Implementation Method 2
The force sensor outputs a signal individually according to a bending direction of the suspension
Data Source
AI summary
The present disclosure relates to a touch input device. The touch input device includes a first touch sensing member which is provided with a first touch surface. A second touch sensing member is disposed across the first touch sensing member, and is provided with a second touch surface that is located on the opposite side of the first touch sensing member. A suspension is provided to be deformable in response to a touch direction when a touch is applied to one of the first touch sensing member and the second touch sensing member. A force sensor is provided in the suspension.