Liquid crystal sunglasses with selectively color adjustable lenses
US5114218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1991 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Jan 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
LC sunglasses with selectively color adjustable lenses comprising an energy cell (30) attached to one butt-strap (22) of a rim (10), a color changing switch (28) supported by another butt-strap (24), a memory chip (26) supported by a bridge portion (16) of the glasses rim, and lenses (12 and 14) of a laminated structure. Each lens consists of a color mosaic mask (43), an input polarizing plate (44), a liquid crystal cell (50) sandwiched between voltage-controlled active matrices (52a and 52b), and an output polarizing plate (46). When the wearer of the sunglasses wants to change the color of the lenses (12 and 14), he/she installs the switch (28) into the position of a selected color, whereby the battery cell (30) is electrically connected with respective pixel sets of the active matrices (52a and 52b) via the memory chip (26). As a result, the lenses will pass only the component of the white light (W) which corresponds to the selected color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.