Privacy Glazing Drive Timing to Offset Peak Power Spikes
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Solution Overview
Problem
Existing electrical drivers for controlling multiple electrically controllable optically active materials face challenges in managing simultaneous current and power spikes, leading to potential damage and inconsistent optical responses due to varying electrical characteristics among structures.
Innovation Solution
A driver system with a switching network and energy storage elements, coupled with a controller, applies staggered electrical drive signals tailored to individual structures' characteristics, ensuring safe and efficient operation by characterizing and adjusting signals based on specific properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple privacy glazing structures are driven simultaneously by a single driver, then the driver can control multiple structures, but current and power spikes occur simultaneously causing damage to the driver
Solution Approach 1:
The patent segments the simultaneous drive signal into multiple staggered drive signals, assigning different time offsets to each privacy glazing structure. This temporal segmentation prevents current and power spikes from occurring simultaneously across all structures, thereby protecting the driver from damage while maintaining control over multiple structures.
2Productivity
If a driver applies electrical drive signals to multiple structures, then all structures can be controlled, but current and power spikes may occur simultaneously placing a large load on the driver
Solution Approach 1:
The patent implements periodic staggered drive signals with different time offsets for each structure. By periodically cycling through the structures with offset timing, the system maintains control over all structures while distributing the peak power demands across different time periods, preventing simultaneous high power draws that would overload the driver.
3Adaptability or versatility
If drive signals are applied to structures with varying electrical characteristics, then all structures can operate, but inconsistent optical responses occur due to current and power spikes
Solution Approach 1:
The patent applies local quality by tailoring the drive signal parameters (voltage, current, frequency, duty cycle) to match the specific electrical characteristics of each privacy glazing structure. Each structure receives a customized drive signal profile that accounts for its unique capacitance, resistance, and switching behavior, ensuring consistent optical responses across all structures despite their varying electrical properties.
Data Source
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AI summary
An electrical driver can be used to provide electrical drive signals to a first and second electrically controllable optical privacy glazing structures. A first electrical drive signal can be applied to the first privacy glazing structure and a second electrical drive signal can be applied to the second privacy glazing structure. Applying the first and second electrical drive signal can comprise temporally staggering delivery of the first and second electrical drive signals such that a peak power draw and/or a peak current draw from the first privacy glazing structure is temporally offset from a peak power draw and/or a peak current draw from the second privacy glazing structure. Staggering can include delaying the application of one electrical drive signal relative to the other, phase shifting one electrical drive signal relative to the other, or a combination thereof.