Timepiece
US6580479B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1999 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Mar 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133545
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A watch unit having a time-displaying section, including a reflection-type polarizing film 14 disposed on an upper portion or a lower portion of the time-displaying section or a portion comprising a part of the time-displaying section, an optical modulation section which varies the ratio of a transmission axis to a reflection axis of the reflection-type polarizing film 14, and a shutter function to shield a portion of or all of the watch unit having the time-display section by varying the reflection intensity and the transmission intensity in relation to the light incident direction using the reflection-type polarinzing film 14 and the optical modulation section, to enhance the appearance and to improve the versatility of the watch unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.