Optical User Interface with Weighted Photosensor Position Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing user interfaces require physical manipulation and are susceptible to electromagnetic interference, lacking precision and intuitiveness in detecting user inputs.
Innovation Solution
A user interface with an optical detection system using a linear detection strip of photosensors, where sensitivity to light is weighted based on the position of the photosensors, allowing precise and contactless detection of user presence and position without cameras or physical devices, and minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical keys or mice are used for user input, then the interface is easy to operate, but the device complexity increases and electromagnetic interference susceptibility increases
Solution Approach 1:
The patent replaces mechanical input devices (keys, mice) with an optical detection system using photosensors and light sources. The system detects user input through optical signals reflected from the user's finger or hand movements, eliminating the need for physical mechanical components while maintaining ease of operation.
Solution Approach 2:
The patent introduces light as an intermediary medium between the user and the detection system. Light sources illuminate the detection zone and photosensors detect reflected light, creating an optical intermediary that transfers user input information without direct physical contact or electromagnetic interference.
2Device complexity
If cameras are used for contactless detection, then the device complexity decreases, but the measurement precision and reliability deteriorate due to electromagnetic interference
Solution Approach 1:
The patent replaces camera-based electromagnetic detection with an optical detection system using photosensors. This substitution eliminates susceptibility to electromagnetic interference while maintaining simple device structure and achieving high measurement precision through weighted sensitivity calculation of multiple photosensor signals.
Solution Approach 2:
The patent changes the detection parameter from general image capture (camera) to specific light intensity measurement (photosensors). By measuring light intensity at multiple positions and applying weighted sensitivity calculations, the system achieves precise position detection without the complexity and interference susceptibility of camera systems.
3Device complexity
If uniform photosensor sensitivity is used, then the device complexity decreases, but the position detection precision deteriorates
Solution Approach 1:
The patent applies local quality by assigning different sensitivity weights to different photosensors based on their positions. Photosensors are configured with sensitivity weights that correspond to their spatial locations, allowing the system to accurately determine object position by analyzing the weighted distribution of detected light signals across the detection zone.
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 and intuitive user input detection in various environments, reducing the need for physical equipment and electromagnetic interference, while maintaining reliability and simplicity.
Implementation Method 1
a linear detection strip, oriented toward the detection zone, and comprising a row of photosensors configured to measure the light intensity of the light emitted by the lighting means
Data Source
AI summary
A user interface, which includes a device for optically detecting the presence and position of an object in a detection zone, includes a lighting means for illuminating the detection zone. A linear detection strip is oriented toward the detection zone. The linear detection strip includes a row of photosensors that are configured to measure the light intensity of the light emitted by the lighting means. The sensitivity to light of each photosensor is weighted depending on the position of the photosensor along the row of photosensors.