Electrochromic glass control device

Details Electrochromic glass control device Electrochromic glass control device

2008-05-20

2008-05-20

Dang, Hung X. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C349S033000, C345S049000, C345S105000, C348S817000

Reexamination Certificate

active

07375871

ABSTRACT:
A light control system having a full range of dimming for smart-glass by providing an interface between an off-the-shelf dimmer and a electrochromic glass device is disclosed herein. The light control system or electrochromic glass control device acts as an interface that converts an asymmetric alternating current (AC) power signal from the dimmer device into a symmetric, amplitude controlled AC output signal for controlling the tint of the smart-glass device. The electrochromic glass control device includes a powerline interface circuit that receives the asymmetric AC power signal from the dimmer. A controller connects to the powerline interface circuit to generate a control signal responsive to the asymmetric AC power signal. Connecting between the dimmer and the controller, an output stage generates the symmetrical AC output signal responsive to the control signal to control the electrochromic glass device.

REFERENCES:
patent: 2005/0200934 (2005-09-01), Callahan et al.

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