Power unit assembly for use with a liquid crystal eyewear device
US8231995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Jul 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A goggle includes a lens assembly which comprises a front lens, a rear lens spaced apart from the front lens, and a liquid crystal device disposed on one of the lenses. The goggle includes a frame, which defines an aperture and a peripheral channel. The peripheral channel receives the front lens and the rear lens is positioned rearward of the channel so that the aperture receives the lens assembly. A power unit includes a battery and a drive circuit, wherein the drive circuit is connected to a pair of prongs that are electrically connectable to the liquid crystal device for operation thereof. The power unit provides a master switch connected to the battery to control application of power to the drive circuit, and a state change switch to control application of power from the drive circuit, through the prongs, to the liquid crystal device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.