Optical Pressure Sensing for Fatigue-Free Multi-Gesture Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mechanical joysticks suffer from mechanical fatigue due to limited operation gestures, leading to user discomfort and inefficiency over long-term use.
Innovation Solution
A pressure detection device with a deformable body, image sensor, and processor that captures and analyzes variations in a pattern on its surface, such as asymmetric dots or conducting dots, to identify and interpret various gestures, eliminating mechanical fatigue by allowing multiple gesture inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional mechanical joystick is used with limited gestures, then the structure is simple and easy to manufacture, but mechanical fatigue occurs due to long-term usage
Solution Approach 1:
The patent replaces the mechanical lever arm and trackball system with a deformable body that uses optical sensing. Instead of mechanical components moving through designated directions, the deformable body changes shape in response to user gestures, and these shape changes are detected by an image sensor monitoring vision features on the inner surface. This substitution eliminates mechanical fatigue while maintaining manufacturability.
Solution Approach 2:
The patent employs a deformable body with a flexible outer surface that can be deformed by user gestures. This flexible structure allows multiple gesture types (pushing, pulling, rotating, pinching) without mechanical wear. The deformable body maintains structural integrity while enabling diverse input methods, resolving the contradiction between simplicity and reliability.
2Device complexity
If a mechanical joystick with designated directions is used, then the device complexity is low, but the adaptability to various gestures is limited
Solution Approach 1:
The patent transitions from a static mechanical structure with fixed movement directions to a dynamic deformable body that can respond to multiple gesture types. The deformable body's outer surface can be pushed, pulled, rotated, pinched, or otherwise deformed, and each gesture type creates distinct shape changes detected by the image sensor. This dynamic response capability increases gesture adaptability while keeping device complexity low.
Solution Approach 2:
The deformable body serves multiple functions: it detects pushing gestures, pulling gestures, rotating gestures, pinching gestures, and other input types through a single unified structure. The image sensor captures vision features that reflect various deformation modes, allowing one component to handle diverse gesture types, thereby improving adaptability without significantly increasing device complexity.
3Measurement precision
If the deformable body with pattern recognition is used, then gesture detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent introduces an intermediary element: a pattern of vision features (such as asymmetric dots or conducting dots) disposed on the inner surface of the deformable body. This pattern acts as a mediator between the physical deformation and the digital detection system. The image sensor captures changes in the pattern's position, shape, or orientation, and the processor analyzes these changes to identify gesture types. This intermediary approach improves detection accuracy while keeping the overall device complexity manageable through software-based pattern 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
The device provides a more comfortable and efficient user experience by enabling the detection of diverse gestures without mechanical fatigue, enhancing usability and reducing wear and tear.
Implementation Method 1
The image sensor is disposed inside the body and faces the inner surface of the body, and is adapted to capture a frame containing the identifiable vision feature on the inner surface
Data Source
AI summary
A pressure detection device of detecting a forced state of a deformable object includes a body, an image sensor and a processor. The body is a deformable hollow structure. The body has an inner surface and an outer surface, and an identifiable vision feature is disposed on the inner surface. The image sensor is disposed inside the body and faces the inner surface of the body, and is adapted to capture a frame containing the identifiable vision feature on the inner surface. The processor is electrically connected with the image sensor, and adapted to analyze position variation of the identifiable vision feature within the captured frame for identifying a motion type of a gesture applied to the outer surface of the body.