Patterned Cover Member for Wearable Optical Sensor Light Management

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Solution Overview

Problem

Ambient light interferes with the measurement precision of heartbeat-related information in wearable electronic devices, degrading the quality of data collected by sensors that rely on optical transmittance changes in blood vessels.

Innovation Solution

A patterned cover member with regions of high and low optical transmittance is used to reduce ambient light ingress, featuring blocking units with low optical transmittance arranged at predetermined intervals on the cover member facing the light emitting and receiving units, thereby minimizing noise and enhancing data quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a cover member with high optical transmittance is used to allow light from the light emitter to reach the light receiver, then the measurement function is enabled, but ambient light interferes with the measurement precision

Engineering Contradiction:

Improveheartbeat-related information measurement precisionVSAvoidambient light interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The cover member is divided into a first region with high optical transmittance for light emitter light passage and a second region with low optical transmittance for blocking ambient light, allowing selective light transmission based on source

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the cover member are assigned different optical transmittance properties: the first region has high transmittance to allow light from the light emitter to pass through, while the second region has low transmittance to block ambient light, creating localized functional zones

Inventive Principle:

Principle #3Local quality

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 solution effectively reduces ambient light interference, improving the measurement precision and quality of heartbeat-related information by blocking unwanted light, allowing for more accurate biometric data collection.

Implementation Method 1

a light emitting unit configured to generate light

Methodology Applied

Scientific EffectLight emission: Light Emitting Diode

Implementation Method 2

a light receiving unit configured to convert light into an electrical signal

Methodology Applied

Scientific EffectPhotoelectric conversion: Photoelectric Effect

Implementation Method 3

blocking units having low optical transmittance arranged at a predetermined interval

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS11963292B2Patterned cover member and electronic device including same

Publication Date: 2024.04.16 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a printed circuit board, a light emitting unit and a light receiving unit which are disposed on the printed circuit board, a cover member which has at least a partial region configured by a material having high optical transmittance, is disposed to face the printed circuit board, and includes a first region substantially facing the light emitting unit, and a second region substantially facing the light receiving unit, and a pattern disposed in at least one of the first region and the second region of the cover member. The pattern may be disposed by repeatedly arranging blocking units having low transmittance at a predetermined interval. In addition, various embodiments may be possible.