Controlling transitions in optically switchable devices
US9885935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2014 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Jun 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/19
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.