Optical Gesture Detection Using Light Concentration
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Solution Overview
Problem
Conventional gesture recognition devices are not compact in size or energy efficient, limiting their application due to the use of image sensors, ultrasonic sensors, and acceleration sensors, which are not suitable for non-contact gesture recognition.
Innovation Solution
An electronic device with an optical source, a light concentrator, and a light receiver using photodiodes to determine the position of a target object based on the light quantity pattern of reflected light, allowing for compact and low-power gesture recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image sensors, ultrasonic sensors, or acceleration sensors are used for gesture recognition, then gesture recognition capability is achieved, but device size and power consumption increase
Solution Approach 1:
The patent replaces conventional sensors (image sensors, ultrasonic sensors, acceleration sensors) with a light-based detection system consisting of a light source, light concentrator, and photodiode array. This substitution uses optical principles instead of mechanical or electronic sensing systems, achieving gesture recognition with lower power consumption and smaller device footprint while maintaining recognition capability
Solution Approach 2:
The patent changes the detection parameter from mechanical movement (acceleration) or sound waves (ultrasonic) to light intensity patterns. By detecting changes in light quantity patterns reflected from the user's hand, the system achieves gesture recognition through optical parameter changes, enabling compact and energy-efficient operation
2Reliability
If image sensors, ultrasonic sensors, or acceleration sensors are used for gesture recognition, then gesture recognition capability is achieved, but device size increases
Solution Approach 1:
The patent replaces bulky conventional sensors with a compact optical detection system using a light source, light concentrator, and photodiode array. This substitution dramatically reduces the physical footprint of the gesture recognition device while maintaining full gesture recognition capability through optical detection principles
Solution Approach 2:
The patent uses a two-dimensional array of photodiodes to detect light intensity patterns, converting spatial information about hand position into electrical signals. This dimensional approach allows compact detection of gesture position and orientation without requiring large sensor areas, achieving efficient space utilization
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 accurate and energy-efficient non-contact gesture recognition by determining the position and distance of a target object using the light quantity pattern and incidence angles, improving the compactness and energy efficiency of the device.
Implementation Method 1
an optical source configured to emit light to a detection area
Implementation Method 2
a light concentrator configured to concentrate light reflected by a target object located in the detection area
Implementation Method 3
a light receiver configured to receive through photodiodes the reflected light concentrated by the light concentrator
Data Source
AI summary
An electronic device for detecting a position of an object is disclosed, The electronic device includes an optical source configured to emit light to a detection area, a light concentrator configured to concentrate light reflected by a target object located in a detection area, a light receiver configured to receive through photodiodes the reflected light concentrated by the light concentrator and to output a light quantity pattern of the reflected light, and a processor configured to determine the position of the target object based on the light quantity pattern of the reflected light.