Biometric Sensor Optical Communication for Noise-Resistant Wireless Charging
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Solution Overview
Problem
Existing wireless charging systems using in-band communication for power reception are limited by restricted information transfer and susceptibility to noise, which affects the reliability and efficiency of communication between electronic devices.
Innovation Solution
Incorporating a biometric sensor with a light emitting diode (LED) and light receiving unit in electronic devices to enable optical communication using a wireless power signal, allowing for robust and reliable data transfer alongside wireless charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If in-band communication is used for wireless charging control, then power transfer capability is improved, but communication reliability deteriorates due to noise susceptibility and restricted information transfer
Solution Approach 1:
The patent separates communication function from power transfer function by using distinct hardware components: the power receiving circuit handles wireless power transfer through electromagnetic induction, while the biometric sensor (with LED and light receiving unit) handles optical communication. This segmentation eliminates interference between power and data channels, resolving the contradiction between power transfer capability and communication reliability.
Solution Approach 2:
The patent introduces an intermediary optical communication channel using the biometric sensor as a mediator. Instead of using the power receiving circuit for both power and data (which causes noise issues), the biometric sensor acts as an independent intermediary that receives optical signals from the external device and converts them to electrical signals, enabling reliable communication separate from the power transfer path.
2Device complexity
If the power receiving circuit is used for both power reception and communication, then device complexity is reduced, but information transfer capability is restricted
Solution Approach 1:
The patent applies multi-functionality to the biometric sensor, which originally was designed for biometric detection but is now repurposed to also perform optical communication functions. The LED can emit light for communication, and the light receiving unit can detect optical signals, allowing a single component to serve multiple purposes (biometric sensing and wireless communication) without significantly increasing overall system complexity.
3Productivity
If optical communication is implemented using biometric sensor, then communication speed is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the communication function with the existing biometric sensor structure. Instead of adding a completely separate communication module, the LED and light receiving unit that were already part of the biometric sensor are utilized for optical communication. This merging approach enables high-speed communication while minimizing the increase in device complexity by reusing existing components for dual purposes.
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
Enhances communication reliability and efficiency by enabling faster and more robust data transfer between electronic devices, providing various information exchange capabilities beyond power transfer.
Implementation Method 1
a biometric sensor including at least one light emitting diode (LED) and at least one light receiving unit and obtaining biometric information using the at least one LED and the at least one light receiving unit
Implementation Method 2
when the electronic device is located within a specific distance from a power transmitting device such as a wireless charging pad, the electronic device may charge the battery of the electronic device, using an electromagnetic induction or resonance phenomenon
Implementation Method 3
to obtain at least part of light reflected by the living body among the light output through the light emitting unit, using the light receiving unit and then detect the biometric signal based at least partly on the obtained light
Data Source
AI summary
An electronic device is provided comprising: a biometric sensor, including at least one light emitting diode (LED) and at least one light receiving unit, for acquiring biometric information by means of the at least one light emitting device and the at least one light receiving unit; a power receiving circuit configured to receive a wireless power signal from an external electronic device; and a processor operatively coupled to the biometric sensor and the power receiving circuit. The processor may be configured to receive a designated wireless power signal from the external electronic device by using the power receiving circuit and to perform optical communication with the external electronic device by using the biosensor when the designated wireless power signal is received. Other various embodiments identified from the specification are also possible.