ELECTROSTATICALLY CONTROLLABLE DEVICE

摘要

An electrostatically controllable optical device is provided, comprising:
a transmissive substrate (101);a single transmissive electrode (102) arranged on a surface of said substrate;a transmissive dielectric layer (103) arranged on said electrode; anda flexible roll-up blind (104) attached to said dielectric layer, said flexible roll-up blind comprising a flexible electrode (106) and a flexible optically functional layer (105) provided on said flexible electrode, said flexible roll-up blind having naturally a rolled configuration and being capable of unrolling in a roll-out direction in response to an electrostatic force. At least one of said transmissive electrode, said transmissive dielectric layer, said flexible electrode and said flexible optically functional layer is adapted with respect to its shape, size, and/or position relative to another one of said transmissive electrode, said transmissive dielectric layer, said flexible electrode and said flexible optically functional layer, to allow partial unrolling but prevent complete unrolling of said flexible roll-up blind.;The electrostatically controllable optical device provides improved switching reliability, and is relatively simple to manufacture.

主权项

1. An electrostatically controllable optical device, comprising:
a transmissive substrate; a single transmissive electrode arranged on a surface of said substrate; a transmissive dielectric layer arranged on said electrode; and a flexible roll-up blind having one end attached to said dielectric layer, said flexible roll-up blind comprising a flexible electrode and a flexible optically functional layer provided on said flexible electrode; said flexible roll-up blind having a permanent mechanical stress to bias the flexible roll-up blind into a rolled configuration proximate the attached end and being capable of unrolling in a roll-out direction in response to an electrostatic force; wherein upon an application of an electrical voltage to the transmissive electrode, an electrostatic force is created which causes an attraction between the transmissive electrode and the flexible electrode, said attraction being greater proximate the attached end than at the end distal the attached end, and wherein said attraction causes the flexible roll-up blind to be partially unrolled while preventing complete unrolling of said flexible roll-up blind.