Apparatus for the control of an electrochromic window

Details Apparatus for the control of an electrochromic window Apparatus for the control of an electrochromic window

1995-04-21

1997-08-05

Saras, Steven

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 84, G09G 338

Patent

active

056547366

ABSTRACT:
An apparatus for the control of an electrochromic window having a three-electrode structure (2, 8, 5) comprises a comparator (12) to maintain within safe limits the potential difference of the electrode (2) and the reference electrode (5), and a shunt unit (16) to switch off the power supply when the current falls below a lower limit and a unit for controlling the coloring density on the basis of the quantity of charge supplied or the optical density of the coloring (FIG. 2).

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