Systems and methods for producing objects incorporating selectably active electromagnetic energy filtering layers and coatings

Patent metadata

Field	Value
Publication number	US-9726791-B2
Application number	US-201615006150-A
Country	US
Kind code	B2
Filing date	Jan 26, 2016
Priority date	Apr 14, 2015
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A system and method are provided for forming body structures including energy filters/shutter components, including energy/light directing/scattering layers that are actively electrically switchable. The filters or components are operable between at least a first mode in which the layers, and thus the presentation of the shutter components, appear substantially transparent when viewed from an energy/light incident side, and a second mode in which the layers, and thus the presentation of the energy filters or shutter components, appear opaque to the incident energy impinging on the energy incident side. The differing modes are selectable by electrically energizing, differentially energizing and/or de-energizing electric fields in a vicinity of the energy scattering layers, including electric fields generated between a pair of transparent electrodes sandwiching an energy scattering layer. Refractive indices of transparent particles, and the transparent matrices in which the particles are fixed, are tunable according to the applied electric fields.

First claim

We claim:

1. An object body structure, comprising:
a structural body member with an energy-incident face including at least first portions and second portions; and
an energy scattering layer formed over the at least the first portions of the energy-incident face of the structural body member, the energy scattering layer having an energy-incident surface and a body side surface opposite the energy-incident surface, the energy scattering layer comprising:
a plurality of substantially-transparent particles; and
a substantially-transparent matrix material that fixes the substantially-transparent particles in a layer arrangement to form the energy scattering layer,
the substantially-transparent particles being fixed in the matrix material in a manner that causes the layer arrangement to have a first refractive index in a first mode, and a second refractive index different from the first refractive index in a second mode when subjected to effects from an externally-applied electrical field,
refractive indices of at least some of the plurality of substantially-transparent particles fixed in the substantially-transparent matrix material being modified by the externally-applied electrical field between the first mode and the second mode, and
a refractive index of at least a portion of the substantially-transparent matrix material being modified by the externally-applied electrical field between the first mode and the second mode.

2. The object body structure of claim 1 , further comprising:
at least one transparent electrode positioned on one of the energy-incident surface or the body side surface of the energy scattering layer, and in contact with the energy scattering layer; and
a power source that generates the electrical field via the at least one first transparent electrode.

3. The object body structure of claim 2 , further comprising a controller for controlling the power source,
the controller being configured to receive a control input from one of an electrically-activated component or an electronic device with which the object body structure is associated, the controller commanding the power source to generate the electrical field to switch the layer arrangement between the first mode and the second mode according to the control input.

4. The object body structure of claim 3 ,
the first refractive index in the first mode rendering the energy scattering layer substantially transparent over the at least the first portions of the energy-incident face of the structural body member, and
the second refractive index in the second mode causing the energy-incident surface of the energy scattering layer to present an opaque appearance in response to incident energy in the form of light energy in the visual range over the at least the first portions of the energy-incident face of the structural body member.

5. The object body structure of claim 4 , the second refractive index in the second mode being adjusted according to (1) the applied electrical field and (2) one or more of an index of refraction of the particles, a size of the particles, a material from which the particles are formed, a structural composition of the particles including a multi-layered structure in which each of a plurality of layers displays a different index of refraction and a composition of the matrix material.

6. The object body structure of claim 5 , the at least one transparent electrode being formed to have a plurality of discrete electrode portions for inducing a plurality of separate electrical fields acting on the energy scattering layer,
discrete portions of the energy scattering layer exhibiting different responses to the plurality of separate electrical fields based on having a plurality of different second refractive indices among the discrete portions in the second mode.

7. The object body structure of claim 6 , the discrete portions of the at least one transparent electrode comprising a pattern formed by one or more of (1) valleys formed in and (2) protrusions formed on the energy-scattering layer facing side of the at least one transparent electrode, the different responses causing the pattern to appear in the energy-incident surface of the energy scattering layer in the second mode.

8. The object body structure of claim 1 , the energy scattering layer in the second mode reflecting a substantially same wavelength of the incident light from the energy-incident surface in a manner that causes the energy-incident surface to cause the first portions of the structural member to appear as single-color opaque surface portions.

9. The object body structure of claim 1 , the energy scattering layer in the second mode reflecting a first wavelength of the incident light from first discrete portions of the energy-incident surface and at least one second wavelength of the incident light from one or more second discrete portions of the energy-incident surface in a manner that causes the first portions of the structural member to appear as at least one of multi-color or texturized opaque surface portions.

10. The object body structure of claim 1 , the energy scattering layer being formed additionally over the at least the second portions of the energy-incident face of the structural body member.

11. The object body structure of claim 10 , the structural body member being a transparent structural body member.

12. The object body structure of claim 1 , the structural body member comprising a wall plate.

13. A method for filtering energy through a structure, comprising:
providing a structural body member with an energy-incident face including at least first portions and second portions, the at least the first portions being transparent; and
forming an energy scattering layer over the at least the first portions of the energy-incident face of the structural body member, the energy scattering layer having an energy-incident surface and a body side surface opposite the energy-incident surface, the energy scattering layer comprising:
a plurality of substantially-transparent particles; and
a substantially-transparent matrix material that fixes the substantially-transparent particles in a layer arrangement to form the energy scattering layer;

fixing the substantially-transparent particles in the matrix material in a manner that causes the layer arrangement to have a first refractive index in a first mode, and a second refractive index different from the first refractive index in a second mode when subjected to effects from an externally-applied electrical field, and
alternately exposing the layer arrangement to the externally-applied electrical field to cause the layer arrangement to switch between the first mode and the second mode,
refractive indices of at least some of the plurality of substantially-transparent particles fixed in the substantially-transparent matrix material being modified by the externally-applied electrical field between the first mode and the second mode, and
a refractive index of at least a portion of the substantially-transparent matrix material being modified by the externally-applied electrical field between the first mode and the second mode.

14. The method of claim 13 , further comprising:
positioning at least one transparent electrode on one of the energy-incident surface and the body side surface of the energy scattering layer;
connecting the at least one transparent electrode to a power source that is controlled to induce the electrical field in the energy scattering layer; and
controlling, with a controller, the power source to switch the energy scattering layer between the first mode and the second mode.

15

Assignees

• Face Int Corp

Inventors

• Boyd Clark D
• Face Bradbury R
• Shepard Jeffrey D

Classifications

• G02B27/1006

  for splitting or combining different wavelengths (G02B27/1086, G02B27/141 take precedence) · CPC title

• B32B2559/00

  Photographic equipment or accessories · CPC title

• B32B2255/26

  Polymeric coating · CPC title

• B32B2255/20

  Inorganic coating · CPC title

• B32B2307/412

  Transparent · CPC title