Liquid crystal lens driver electronics for eye protection, high speed shuttering with consistent performance
US5751258A · kind A · utility
116Cited by
27References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Sep 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/0276
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power supply circuit for a liquid crystal welding lens or shutter provides a consistent and stable regulated power signal for driving or powering the liquid crystal shutter for maintaining stable performance over the life of the power supply and a battery level indicator feature to provide advance warning of degraded device performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.