Method and apparatus for controlling an electrochromic device
US5973818A · kind A · utility
140Cited by
22References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Sep 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/163
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and concomitant apparatus for use in an electrochromic control system in which components causing the charging and discharging of an electrochromic device are subject to drift errors and other errors. In the case of such errors, the actual programming level and the desired programming level as indicated by, e.g., a count value, may diverge. The invention periodically determines the actual programming level of the electrochromic device and responsively adjusts a parameter representative of the desired programming level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.