Electrochromic window with high reflectivity modulation
US6094292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1555
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-layered, active, thin film, solid-state electrochromic device having a high reflectivity in the near infrared in a colored state, a high reflectivity and transmissivity modulation when switching between colored and bleached states, a low absorptivity in the near infrared, and fast switching times, and methods for its manufacture and switching are provided. In one embodiment, a multi-layered device comprising a first indium tin oxide transparent electronic conductor, a transparent ion blocking layer, a tungsten oxide electrochromic anode, a lithium ion conducting-electrically resistive electrolyte, a complimentary lithium mixed metal oxide electrochromic cathode, a transparent ohmic contact layer, a second indium oxide transparent electronic conductor, and a silicon nitride encapsulant is provided. Through elimination of optional intermediate layers, simplified device designs are provided as alternative embodiments. Typical colored-state reflectivity of the multi-layered device is greater than 50% in the near infrared, bleached-state reflectivity is less than 40% in the visible, bleached-state transmissivity is greater than 60% in the near infrared and greater than 40% in th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.