Timepiece
US6169708A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2000 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Feb 9, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A timepiece with a liquid crystal display panel 40 having at least either of a time display section 40a and a calendar display section 40b, and comprising a TN liquid crystal cell with about 90.degree. twisted nematic liquid crystals sealed in-between a pair of transparent substrates having respective transparent electrodes, a first polarizing film disposed on the visible side of the TN liquid crystal cell, a second polarizing film, a retardation film for circularly polarized light, a cholestric liquid crystal polymer sheet, a translucent light absorbing member and a backlight disposed successively on a side of the TN liquid crystal cell, opposite from the visible side thereof. With such a constitution, time display and calendar display are rendered visible even at night by lighting up the backlight, and colored display in a metallic tone can be indicated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.