Detection device

The detection device uses a multi-color light source and strategically positioned optical sensors to achieve accurate results and reduce power consumption, addressing distance and battery capacity challenges in wearable detection devices.

WO2025004624A1PCT designated stage expired Publication Date: 2025-01-02JAPAN DISPLAY INC
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Patent Information

Application Number
PCT/JP2024/018802
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-26
Filing Date
2024-05-22
Publication Date
2025-01-02

AI Technical Summary

Technical Problem

Existing detection devices face challenges in obtaining accurate results when the distance from the detection unit to the human body is significant, and they often have limited battery capacity, leading to high power consumption.

Method used

A detection device equipped with a light source emitting multiple colors of light, including visible and near-infrared/infrared, and featuring two optical sensors positioned at different distances from the light source, allowing for efficient signal processing and reduced power consumption by selectively connecting sensors during light emission periods.

Benefits of technology

This configuration enables accurate detection results while minimizing power consumption, effectively addressing the limitations of distance and battery capacity in wearable detection devices.

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Abstract

The present invention provides a detection device that can obtain appropriate detection results and suppresses power consumption. A detection device according to the present invention includes a light source that can shine light of a plurality of colors that have different wavelengths at a finger on which the detection device is installed, a light sensor that receives light from the finger as input and outputs a signal that corresponds to the light, and a detection circuit that performs signal processing on the basis of the output signal of the light sensor. The light sensor includes a first light sensor and a second light sensor that is provided further from the light source. The light source includes a first light source that can emit visible light, a second light source that can emit near infrared light or infrared light, and a third light source that can emit visible light that is different from the visible light of the first light source. The first light sensor is connected to the detection circuit during a first light emission period in which the third light source emits light but the first and second light sources do not, and at least one of the first light sensor and the second light sensor is connected to the detection circuit during a second light emission period in which the first or second light source emits light but the third light source does not.
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Citation Information

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