Patent ID: 6501457
Filing Date: 2002-12-31
Classification: E06B,G02F

Abstract:
A circuit arrangement for regulating light transmission of an electrochromic glass, said circuit arrangement comprising:a microprocessor having a first microprocessor input, a second microprocessor input, and a microprocessor output; a voltage follower comprising a regulated voltage source; a voltage reversing device having two voltage reversing outputs; a first analog-to-digital converter; a second analog-to-digital converter; a digital-to-analog converter; a variable reference voltage device; and an electrochromic glass having a first terminal and a second terminal; wherein said variable reference voltage device is connected to said first microprocessor input of said microprocessor via said first analog-to-digital converter; wherein said microprocessor output of said microprocessor is connected to said voltage follower via said digital-to-analog converter; wherein said voltage reversing outputs of said voltage reversing device are electrically connected to said first and second terminals of said electrochromic glass;. and wherein said second terminal of said electrochromic glass and one of said voltage reversing outputs of said voltage reversing device are connected to said second microprocessor input of said microprocessor via said second analog-to-digital converter.