Controller for optically-switchable windows

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United States of America Patent

PATENT NO 11796886
APP PUB NO 20210072611A1
SERIAL NO

16949855

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Abstract

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This disclosure provides a window controller that includes a command-voltage generator that generates a command voltage signal, and a pulse-width-modulated-signal generator that generates a pulse-width-modulated signal based on the command voltage signal. The pulse-width-modulated signal drives an optically-switchable device. The pulse-width-modulated signal comprises a first power component having a first duty cycle and a second power component having a second duty cycle. The first component delivers a first pulse during each active portion of the first duty cycle, and the second component delivers a second pulse during each active portion of the second duty cycle. The first pulses are applied to a first conductive layer and the second pulses are applied to a second conductive layer. The relative durations of the active portions and the relative durations of the first and second pulses are adjusted to result in a change in an effective DC voltage applied across the optically-switchable device.

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Patent Owner(s)

  • VIEW, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brown, Stephen Clark San Mateo, US 140 3203

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