Patent ID: 6246505
Filing Date: 2001-06-12
Classification: B32B,G02F,H01M

Abstract:
A controllable photochromic glazing comprising:a photochromic cell comprising a first transparent substrate having a front and rear surface, said front surface of said first substrate coated with a first transparent electronic conductor; a second transparent substrate having a front and rear surface, said front surface of said second substrate coated with a second transparent electronic conductor; said first and second substrates spaced apart and arranged so that said transparent conductor coated surface of said first substrate opposes said transparent conductor coated surface of said second substrate; a photochromic medium disposed between said first and second substrates and contacting said transparent conductors;electrical connection means for electrically connecting said first and second transparent conductors, said electrical connection means including control means to provide said device with controllability whereby transmission of light through said photochromic cell can increase from a lower transmission level to a higher transmission level by said control means increasing the electrical resistance of said electrical connection means from a lower resistance level to a higher resistance level.