Smartphone Light Module for White Illumination and Biological Sensing
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Solution Overview
Problem
Existing light-emitting modules cannot effectively emit white light and simultaneously output biological photodetection information for obtaining biological information.
Innovation Solution
A light-emitting module comprising a substrate with at least one light source that emits white light, a light-receiving element for biological photodetection, and a lens to facilitate the emission and detection of light, allowing for the output of biological photodetection information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-emitting module uses a single light source configuration, then the structure is simple, but it cannot simultaneously emit white light and perform biological photodetection
Solution Approach 1:
The patent implements multi-functionality by integrating both a white light source for illumination and a separate light source for biological photodetection within a single light-emitting module. The control unit manages both functions, allowing the module to serve dual purposes: emitting white light for general illumination and emitting specific wavelength light for detecting biological information such as pulse and blood oxygen concentration, thereby achieving universality without requiring separate devices
Solution Approach 2:
The patent applies segmentation by dividing the light-emitting module into distinct functional components: a white light source unit and a biological photodetection light source unit. Each unit has its dedicated light-receiving element, allowing independent operation and optimization of each function while maintaining a unified module structure. This segmentation enables the module to perform both functions effectively without interference
2Illumination intensity
If white light is emitted for illumination, then lighting function is achieved, but biological photodetection information cannot be obtained
Solution Approach 1:
The patent implements periodic action by alternately activating different light sources based on functional requirements. The control unit switches between the white light source for illumination and the biological photodetection light source for sensing. This periodic switching allows the module to provide white light illumination when needed while separately performing biological photodetection without interference from continuous white light emission
Solution Approach 2:
The patent uses the control unit as an intermediary that manages the operation of different light sources and coordinates their functions. The control unit receives input signals and determines whether to activate the white light source or the biological photodetection light source, thereby mediating between the illumination function and the photodetection function to prevent information loss
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 module achieves the emission of white light and the output of biological photodetection information, enabling the acquisition of biological information such as pulse and blood oxygen concentration.
Implementation Method 1
at least one light source that emits white light composed of mixed-color light of red light, green light, and blue light
Implementation Method 2
at least one light-receiving element that outputs biological photodetection information obtained by receiving at least one of reflected light and scattered light by a biological body of light emitted from the light source
Data Source
AI summary
A light-emitting module includes: a substrate; plurality of light sources disposed on the substrate, the plurality of light sources including a red light source, a green light source, a blue light source, and an infrared light source; at least one light-receiving element disposed on the substrate; and a lens disposed facing the plurality of light sources and the at least one light-receiving element. The red light source includes: a first light-emitting element configured to emit blue light, and a first phosphor configured to convert a wavelength of at least part of the blue light emitted from the first light-emitting element to emit red light. The at least one light-receiving element is configured to output biological photodetection information obtained by receiving light that has been emitted from at least one of the plurality of light sources and reflected or scattered by a biological body.