Mirror with dazzle light attenuation zone
US5168378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1992 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Feb 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A liquid-crystal matrix-type reflection mirror (10) with a localized dazzle light attenuation zone. The mirror has a multilayered structure and consists of a broadband reflective base mirror (12) having maximum reflectivity in the range corresponding to spectral range of halogen lamps of automobile headlights. Deposited on the base mirror are a matrix transparent electrode (14) and a photoconductive layer (20) placed on the matrix transparent electrode. The photoconductive layer (20) and the matrix transparent electrode (14) have a matrix-type structure formed as a pixel array. Each pixel of the matrix transparent electrode (14) is a projection of an overlaid pixel of the photoconductive layer (20). The multilayered structure further includes the following subsequent layers: a rear polarizer (22) which has a predetermined axis of polarization and is placed on the photoconductive layer, a common transparent electrode (36), a liquid crystal (25) sandwiched and sealed between the rear polarizer (22) and the common transparent electrode (36), a front polarizer (42), and an antireflection coating (44). The mirror (10) has a control circuit connected between the common transparent electr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.