Coded Light Electronic Architecture for Ambient Noise Rejection

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Solution Overview

Problem

Existing optical analysis methods face challenges in achieving high sensitivity and stability for non-invasive detection of target analytes due to noise from ambient light and external interference, particularly in low-power, battery-operated devices.

Innovation Solution

An electronic interface device with coded light architecture that includes an electronic interface device and optics, using coded light sources and photodetectors to enhance sensitivity, stability, and power efficiency, enabling ultra-high signal-to-noise ratio and rejection of ambient noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional optical analysis methods are used, then measurement can be performed, but sensitivity and stability are insufficient due to noise from ambient light and external interference

Engineering Contradiction:

ImprovesensitivityVSAvoidnoise from ambient light

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by modulating the light source with a known code pattern before the light interacts with the target. This pre-encoding of information allows the system to distinguish signal from noise during subsequent measurement, thereby improving sensitivity without requiring complex filtering or post-processing

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses an intermediary approach by introducing a coded modulation layer between the light source and the target. This coded light acts as a carrier that embeds identification information, enabling the system to selectively detect and reject ambient noise while preserving the target signal through correlation processing

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If high intensity illumination is used to improve signal strength, then measurement sensitivity improves, but power consumption increases

Engineering Contradiction:

Improvesignal strengthVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies periodic action by using time-modulated light emission patterns. Instead of continuous high-intensity illumination, the system uses periodic coding sequences that enable signal extraction through temporal correlation, reducing average power consumption while maintaining measurement sensitivity

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent changes the parameter of light emission from constant intensity to time-varying coded patterns. This parameter transformation allows the system to achieve high signal-to-noise ratio through intelligent signal processing rather than brute-force intensity increase, thereby reducing power consumption

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If thermoelectric cooling is used to reduce photodetector noise, then measurement stability improves, but device complexity and power consumption increase

Engineering Contradiction:

Improvemeasurement stabilityVSAvoidcooling system complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent substitutes the mechanical/thermal cooling system with an electronic signal processing approach. Instead of physically cooling photodetectors to reduce noise, the system uses coded modulation and correlation processing to electronically separate signal from noise, eliminating the need for thermoelectric coolers and reducing device complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary signal processing layer that mediates between the photodetector output and the final measurement. This intermediary correlation processing systematically removes noise effects without requiring physical cooling, thereby achieving measurement stability with simpler device architecture

Inventive Principle:

Principle #24Intermediary (Mediator)

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 non-invasive detection of molecules like glucose and environmental gases with high sensitivity and low power consumption, reducing the need for thermoelectric cooling and improving measurement accuracy in wearable devices.

Implementation Method 1

measuring a scattering response

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS12458260B1Electronic architecture for coded light target analysis

Publication Date: 2025.11.04 EMCODE PHOTONICS LLC

AI summary

An electronic interface device is configured for use with associated optics for employing coded light for illuminating a liquid, gaseous, or other analyte or target, such as for measuring or determining a composition or other property of the analyte or target. The arrangement can help enable a far higher level of performance, such as for spectral analysis, imaging, or both. A shared common clock on both the illumination and receive sides of the system can be included, such as together with one or more of reference detection, per-channel wavelength-dependent modulation, multiple concurrent feedback loops at different levels, orthogonal and circulant codes, phase-scrambling to better utilize ADC dynamic range, oversampling, and other signal processing can be provided.