Dynamic Glass Voltage Sequencing for Uniform Tint Transitions

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Solution Overview

Problem

Conventional electrochromic devices suffer from uneven tint profiles during transitions and slow transition speeds, leading to unsatisfactory user experiences.

Innovation Solution

Implementing a voltage control method that includes a ramp-to-drive voltage with increasing magnitude, followed by a drive voltage with constant polarity, a drive-reverse voltage with opposite polarity, and a hold voltage with smaller magnitude to enhance tint transition uniformity and speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a simple voltage control method is used, then the device complexity is reduced, but the tint transition uniformity deteriorates

Engineering Contradiction:

Improvevoltage control complexityVSAvoidtint transition uniformity

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The voltage control method is segmented into four distinct stages: ramp-to-drive voltage stage, drive voltage stage, drive-reverse voltage stage, and hold voltage stage. Each stage serves a specific function in achieving uniform tint transition, breaking down the complex control process into manageable segments that address different aspects of the transition uniformity problem

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic voltage control by adjusting both the magnitude and polarity of voltage throughout the transition process. The voltage parameters change dynamically across different stages, with the ramp-to-drive stage increasing voltage magnitude, the drive stage maintaining constant polarity, the drive-reverse stage flipping polarity, and the hold stage reducing magnitude, creating a dynamic control strategy that optimizes transition uniformity

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If a simple voltage control method is used, then the ease of operation is improved, but the transition speed deteriorates

Engineering Contradiction:

Improvecontrol simplicityVSAvoidtint transition speed

Core Design Contradiction:

Ease of operationVSSpeed

Solution Approach 1:

The ramp-to-drive voltage stage performs preliminary action by gradually increasing the voltage magnitude before the main drive voltage is applied. This preliminary ramping prepares the electrochromic device for the subsequent rapid transition, preventing sudden shocks while ensuring the device is ready for fast tinting when the drive voltage stage begins

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The voltage control follows a periodic sequence of four distinct stages with specific time durations. Each stage is applied in a predetermined sequence (ramp-to-drive → drive → drive-reverse → hold), creating a periodic control pattern that balances ease of operation with optimized transition speed through structured temporal progression

Inventive Principle:

Principle #19Periodic action

3Use of energy by moving object

If conventional voltage control is used, then the energy consumption is reduced, but the tint transition uniformity deteriorates

Engineering Contradiction:

Improveenergy consumptionVSAvoidtint transition uniformity

Core Design Contradiction:

Use of energy by moving objectVSManufacturing precision

Solution Approach 1:

The drive-reverse voltage stage applies localized correction by reversing the polarity to specifically address non-uniformity issues that develop during the drive stage. This targeted reverse voltage action corrects edge effects and ensures uniform tint distribution across the device surface, improving precision without requiring continuously high energy input

Inventive Principle:

Principle #3Local quality

4Speed

If the voltage magnitude is increased to speed up transition, then the transition speed is improved, but the device complexity increases

Engineering Contradiction:

Improvetint transition speedVSAvoidvoltage control complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

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 method achieves faster and more uniform tint transitions across electrochromic devices, improving user experience by ensuring consistent tint levels and reducing transition times.

Implementation Method 1

Electrochromism is a phenomenon in which a material exhibits a reversible electrochemically-mediated change in an optical property when placed in a different electronic state, typically by being subjected to a voltage change. The optical property is typically one or more of color, transmittance, absorbance, and reflectance. One well known electrochromic material is tungsten oxide (WO3).

Methodology Applied

Scientific EffectElectrochromism: Electrochromism

Data Source

PatentUS20250257609A1Method for improved aesthetics of dynamic glass

Publication Date: 2025.08.14 VIEW INC

AI summary

Methods, computer program products, and devices for controlling tint of electrochromic devices that includes, e.g., applying ramp-to-drive voltage having magnitude that increases during ramp-to-drive period, applying drive voltage having substantially constant magnitude and same polarity as ramp-to-drive voltage at end of ramp-to-drive period, applying drive-reverse voltage, and applying hold voltage having same polarity as, and smaller magnitude than, drive voltage.