CONTROL SYSTEM FOR ELECTROCHROMIC DEVICE - SAGE ELECTROCHROMICS INC

Title:

CONTROL SYSTEM FOR ELECTROCHROMIC DEVICE

Document Type and Number:

Japanese Patent JP2006053551

Kind Code:

A

Abstract:

To provide a control system for an electrochromic (EC) device which can monitor the temperature of the EC device without requiring an external temperature monitoring element and control the EC device based on the temperature readings.

The control system provides methods for heating the EC device using current flowing through the device and for simultaneously heating and changing the transmissivity level of the device. The controller also provides security feedback by detecting glass breakage via a high frequency impedance measurement of the EC device. The controller also provides for methods of determining the bleaching/coloring history of the EC device, determining the transition state of the EC device, and applying a holding voltage to maintain the transmission state of the EC device.

Inventors:

GREER BRYAN D

Application Number:

JP2005214689A

Publication Date:

February 23, 2006

Filing Date:

July 25, 2005

Export Citation:

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Assignee:

SAGE ELECTROCHROMICS INC

International Classes:

G02F1/15; G02F1/163; G08B13/04

Domestic Patent References:

JPS6159317A	1986-03-26
JPS61245143A	1986-10-31
JPH1195266A	1999-04-09

Attorney, Agent or Firm:

Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo

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