Electro-optic Device Potential Drop Compensation

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Solution Overview

Problem

Electro-optic devices face variability in the electrical potential delivered to the electro-optic medium due to inrush currents and resistance variances, leading to inconsistent activation and transmissivity.

Innovation Solution

A system comprising a power source, voltmeter, and controller that measures the actual potential across the electro-optic medium and dynamically adjusts the drive potential to achieve a desired level of activation, compensating for inherent potential drops.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a fixed drive potential is supplied by the power source, then the system is simple to operate, but the actual potential delivered to the electro-optic medium varies due to inrush currents and resistance variances

Engineering Contradiction:

Improveconsistency of electro-optic activationVSAvoidcomplexity of potential delivery system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback control system where a voltmeter continuously measures the actual potential across the electro-optic medium, and a controller adjusts the drive potential from the power source based on this measurement to maintain the desired activation level. This closed-loop feedback mechanism compensates for potential drops caused by inrush currents and resistance variances, ensuring reliable and consistent electro-optic activation despite variations in operating conditions.

Inventive Principle:

Principle #23Feedback

2Reliability

If the drive potential is increased to compensate for potential drop, then the desired potential at the electro-optic medium is achieved, but energy loss increases

Engineering Contradiction:

Improveachievement of desired potentialVSAvoidenergy loss in potential drop

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent employs a dynamic adjustment mechanism where the drive potential is not fixed but is continuously modified based on real-time measurements of the actual potential at the electro-optic medium. The controller dynamically increases or decreases the drive potential as needed to maintain the desired activation level, rather than permanently operating at a higher potential that would waste energy. This dynamic approach ensures the desired potential is achieved only when necessary, minimizing energy loss.

Inventive Principle:

Principle #15Dynamics

3Reliability

If potential drop compensation is implemented, then activation consistency improves, but device complexity increases

Engineering Contradiction:

Improveconstant transmissivityVSAvoidcomplexity of control system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs self-adjustment by automatically measuring its own operating conditions through the voltmeter and correcting potential drops through the controller without requiring external intervention. The electro-optic device effectively monitors and regulates its own activation level, maintaining constant transmissivity through autonomous feedback control rather than requiring complex external regulation systems.

Inventive Principle:

Principle #25Self-service

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

This solution ensures more reliable and constant electro-optic activation and transmissivity by accurately maintaining the desired electrical potential, reducing fluctuations caused by manufacturing inconsistencies and operational changes.

Implementation Method 1

The voltmeter may be operable to measure a second electrical potential between two points within the chamber

Methodology Applied

Scientific EffectElectrical potential measurement: Ohm's Law

Implementation Method 2

Some electro-optic devices are electrochromic and accordingly, when activated, change their color and/or light transmissivity

Methodology Applied

Scientific EffectElectrochromism: Electrochromism

Data Source

PatentUS11360367B2Potential drop compensated electro-optic device

Publication Date: 2022.06.14 GENTEX CORP

AI summary

An electro-optic system where an electrical potential is changed and/or regulated to achieve a desired potential applied to an electro-optic medium. The electro-optic system comprises an electro-optic medium disposed in a chamber defined in part by two electrodes. A power source is connected to the two electrodes and thereby operable to apply an electrical potential to the electrochromic medium across the two electrodes. A voltmeter is operable to measure an electrical potential between two points within the chamber. Additionally, a controller is connected to the voltmeter and the power source and is operable to regulate the electrical potential applied by the power source based, at least in part, on the electrical potential measured between the two points within the chamber by the voltmeter.