Tunable blinds for windows

Patent metadata

Field	Value
Publication number	US-11911996-B2
Application number	US-201916965531-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Jan 29, 2018
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Methods and apparatus for modulating light using a tunable light modulation device. The tunable light modulation devices comprises an elastomer structure including at least one elastomer layer, a compliant electrode network of conducting fibers arranged on a first surface of the at least one elastomer layer, a patterned electric conductor arranged on a second surface of the at least one elastomer layer opposite the first surface. The patterned electric conductor includes a plurality of individually-addressable sections, and the compliant electrode network is configured to compress the at least one elastomer layer in the presence of an electric field between the compliant electrode network and one or more of the individually-addressable sections of the patterned electric conductor to produce a voltage-dependent roughening of the at least one elastomer layer.

First claim

The invention claimed is:

1. A tunable light modulation device, comprising:
an elastomer structure including at least one elastomer layer;
a compliant electrode network of conducting fibers arranged on a first surface of the at least one elastomer layer, wherein the compliant electrode network is configured to be held at a first voltage potential; and
a patterned electric conductor arranged on a second surface of the at least one elastomer layer opposite the first surface,
wherein the patterned electric conductor includes a plurality of individually-addressable sections configured to be selectively coupled to at least one second voltage potential different from the first voltage potential, and
wherein the compliant electrode network is configured to compress the first surface of the at least one elastomer layer in a presence of an electric field between the compliant electrode network and one or more of the plurality of individually-addressable sections of the patterned electric conductor to produce a voltage-dependent roughening of the first surface of the at least one elastomer layer.

2. The tunable light modulation device of claim 1 , wherein the plurality of individually-addressable sections are separated by gaps to prevent electrical shorting between the plurality of individually-addressable sections.

3. The tunable light modulation device of claim 1 , further comprising a transparent substrate arranged adjacent to the patterned electric conductor.

4. The tunable light modulation device of claim 3 , wherein the transparent substrate is curved and/or flexible.

5. The tunable light modulation device of claim 1 , further comprising a controller configured to selectively provide a voltage to one or more of the plurality of individually-addressable sections and/or wirelessly receive control signals from a mobile electronic device.

6. The tunable light modulation device of claim 5 , wherein the controller is configured to selectively provide a voltage to the plurality of individually-addressable sections in sequence to provide a dynamic translucence effect.

7. The tunable light modulation device of claim 6 , wherein the plurality of individually-addressable sections are arranged as a series of conductive strips separated by gaps, and wherein the dynamic translucence effect mimics an opening or closing of horizontal or vertical blinds.

8. The tunable light modulation device of claim 1 , further comprising a plurality of conductive interconnects, each of which is arranged to couple one of the plurality of individually-addressable sections to a voltage source.

9. The tunable light modulation device of claim 1 , wherein the compliant electrode network of conducting fibers comprises a plurality of nanowires or a plurality of carbon nanotubes.

10. The tunable light modulation device of claim 1 , wherein the patterned electric conductor comprises a plurality of electrically conducting layers, and wherein the plurality of individually-addressable sections includes a plurality of first conductive strips arranged in a first direction within a first layer of the plurality of electrically conducting layers and a plurality of second conductive strips arranged in a second direction within a second layer of the plurality of electrically conducting layers, wherein the second direction is perpendicular to the first direction.

11. The tunable light modulation device of claim 1 , wherein the at least one elastomer layer comprises at least one soft elastomer layer and at least one stiff dielectric layer having a stiffness greater than a stiffness of the at least one soft elastomer layer,
wherein the compliant electrode network is arranged on a surface of the at least one soft elastomer layer, and
wherein the patterned electric conductor is arranged on a surface of the at least one stiff dielectric layer.

12. A tunable blinds structure, comprising:
a transparent substrate;
a patterned electric conductor arranged on a surface of the transparent substrate, wherein the patterned electric conductor includes a plurality of individually-addressable conductive strips arranged in a vertical or horizontal direction along the transparent substrate,
an elastomer structure arranged adjacent to the patterned electric conductor; and
a compliant electrode network of conducting fibers arranged on a surface of the elastomer structure, wherein the compliant electrode network is configured to compress the elastomer structure in a presence of an electric field between the compliant electrode network and one or more of the plurality of individually-addressable conductive strips to produce a voltage-dependent roughening of the surface of the elastomer structure, wherein the compliant electrode network is configured to be held at a first voltage potential, and wherein the plurality of individually-addressable conductive strips are configured to be selectively coupled to at least one second voltage potential different from the first voltage potential.

13. The tunable blinds structure of claim 12 , further comprising a controller configured to selectively provide a voltage to one or more of the plurality of individually-addressable conductive strips and/or wirelessly receive control signals from a mobile electronic device.

14. The tunable blinds structure of claim 13 , wherein the controller is configured to selectively provide a voltage to the plurality of individually-addressable conductive strips in sequence to provide a dynamic translucence effect to mimic an opening or closing of blinds on the transparent substrate.

15. The tunable blinds structure of claim 12 , wherein the elastomer structure includes at least one soft elastomer layer upon which the compliant electrode network is arranged and at least one stiff dielectric layer having a stiffness greater than a stiffness of the at least one soft elastomer layer.

16. A method of modulating translucency of an elastomer structure including at least one elastomer layer, the method comprising:
generating an electric field between a compliant electrode network of conducting fibers arranged on a first surface of the at least one elastomer layer and one or more of a plurality of individually-addressable sections of a patterned electric conductor arranged on a second surface of the at least one elastomer layer opposite the first surface, the generating comprising:
holding the compliant electrode network at a first voltage potential; and
selectively coupling the one or more of the plurality of individually-addressable sections of the patterned electric conductor to at least one second voltage potential different from the first voltage potential,

wherein the first surface of the at least one elastomer layer is compressed in a presence of the electric field to modulate the translucency of the elastomer structure at a location of the one or more of the plurality of individually-addressable sections of the patterned electric conductor by producing a voltage-dependent roughening of the first surface of the at least one elastomer layer.

17. The method of claim 16 , further comprising selectively providing a voltage to two or more of the plurality of individually-addressable sections in sequence to provide a dynamic translucence effect.

18. The method of claim 16 , further comprising wirelessly receiving control signals from a mobile electronic device and actuating the one or more of the plurality of individually-addressable sections based on the received control signals.

Assignees

• Harvard College
• Cardinal Cg Co

Inventors

• Cheng Kezi
• Hussain Aftab
• Burrows Keith
• Clarke David

Classifications

• B32B17/10 Primary

  of synthetic resin · CPC title

• B32B17/063

  of rubber · CPC title

• B32B25/08

  of synthetic resin · CPC title

• B32B25/10

  next to a fibrous or filamentary layer · CPC title

• E06B9/24

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title