Electrochromic system with measurement of charge to be transferr

Details Electrochromic system with measurement of charge to be transferr Electrochromic system with measurement of charge to be transferr

1993-04-29

1994-11-15

LaRoche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359265, 359275, 345105, G02F 103, G02F 107

Patent

active

053653653

ABSTRACT:
An electrochromic system for controlling the color state of an electrochromic pane. The charge needed to obtain the desired color is determined from the discharge potential of the system and the coloration set-point. An integrator measures the charge passing through the system and compares it to the charge to be transferred. This charge is measured by a differential amplifier which compares a discharge potential measured by a capacitor with a selected color set-point.

REFERENCES:
patent: 4242681 (1980-12-01), Tabata
patent: 4529275 (1985-07-01), Ballmer
patent: 4832468 (1989-05-01), Ito
patent: 4896030 (1990-01-01), Miyaji
patent: 5193029 (1993-03-01), Schofield
patent: 5220317 (1993-06-01), Lynam

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