Electronic Device Biometric Sensing Wavelength Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electronic devices lack an efficient method for accurately measuring biometric information, such as fingerprint, pulse, and blood oxygen saturation, using light-based recognition schemes that can effectively differentiate between various types of biometric data and adjust light wavelengths accordingly.
Innovation Solution
An electronic device with a display panel and input device that utilizes light emitting and receiving elements to provide and detect light signals, where a control module adjusts the wavelength of light based on the type of biometric information to be measured, using visible light for fingerprint and blood oxygen saturation and infrared for pulse, and alternates between wavelengths for blood oxygen saturation measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light wavelength is used for biometric measurement, then the device structure is simple, but the ability to differentiate between various types of biometric data is insufficient
Solution Approach 1:
The patent implements dynamic wavelength switching where the light source changes its emission wavelength based on the type of biometric measurement being performed. The display panel dynamically adjusts between visible light wavelengths (for fingerprint and blood oxygen saturation) and infrared wavelengths (for pulse measurement), allowing a single device structure to adapt to multiple measurement types without requiring separate fixed-wavelength light sources for each function
Solution Approach 2:
The patent changes the physical parameter of light wavelength to differentiate between various biometric measurement types. By controlling the light source to emit at specific wavelengths (visible or infrared) depending on the measurement requirement, the system achieves versatility in handling different biometric data types while maintaining a unified device structure
2Measurement precision
If multiple light wavelengths are used for different biometric measurements, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the display panel universally functional by enabling it to serve both as a display device and as a biometric sensing device. The same display panel structure performs multiple functions: displaying information and conducting biometric measurements across different wavelength ranges, thereby achieving high measurement precision without proportionally increasing device complexity
Solution Approach 2:
The patent merges the light emission function and light detection function into a single integrated display panel structure. The display panel combines light emitting elements (for providing illumination at different wavelengths) and light receiving sensors (for detecting reflected or transmitted light), creating a unified multi-functional device that achieves precise biometric measurements without requiring separate dedicated hardware components
3Measurement precision
If visible light is used for fingerprint measurement, then measurement precision is improved, but energy consumption increases compared to infrared
Solution Approach 1:
The patent dynamically changes the light wavelength parameter based on the specific biometric measurement task. For fingerprint recognition, it uses visible light wavelengths that provide superior measurement precision. For pulse measurement, it switches to infrared wavelengths. This parameter switching allows the system to optimize for precision when needed while managing energy consumption through selective wavelength usage
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 efficient measurement of biometric information by distinguishing between different types of biometric data through controlled light wavelength adjustment, improving the precision and reliability of biometric data acquisition.
Implementation Method 1
The light receiving sensors may detect the second light provided from the input device and generate a detection signal
Data Source
AI summary
An electronic device includes a display panel including a base layer, and an element layer disposed on the base layer, the element layer including pixels outputting a first light, and light receiving sensors, an input device providing a second light to the display panel, and a control module controlling operations of the display panel and the input device. The light receiving sensors detect the second light provided from the input device and generate a detection signal. The control module calculates biometric information of a user based on the detection signal.