Mirror with dazzle light attenuation zone

Details Mirror with dazzle light attenuation zone Mirror with dazzle light attenuation zone

1992-02-10

1992-12-01

Sikes, William L.

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 70, 359 72, 359 79, 359 63, 359 85, G02F 113

Patent

active

051683784

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 electrode (36) and the matrix transparent electrode. The control circuit applies a control voltage to the liquid crystal in accordance with the incident light. The pixel enabling just the dazzle light zone to be attenuating.

REFERENCES:
patent: 4623222 (1986-11-01), Itoh et al.
patent: 4655549 (1987-04-01), Suzuki et al.
patent: 4669827 (1987-06-01), Fukada et al.
patent: 4671617 (1987-06-01), Hara
patent: 4693558 (1987-09-01), Nakaho et al.
patent: 4696548 (1987-09-01), Ueno et al.

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