Controlled switching for electrochromic devices

Patent metadata

Field	Value
Publication number	US-9939702-B2
Application number	US-201514741156-A
Country	US
Kind code	B2
Filing date	Jun 16, 2015
Priority date	Jun 17, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

An electrochromic device is structured to selectively switch separate regions to separate transmission levels, based at least in part upon different transport rates of different charged electrolyte species in the separate regions. Charged electrolyte species can be introduced in various regions of one or more electrochromic stack layers, including a counter-electrode layer, ion-conducting layer, and electrochromic layer. The charged electrolyte species can have different transport rates, so that a distribution of one species introduced in some regions move between layers and different rates relative another distribution of another species introduced in some regions. A species can be introduced, in one or more regions, in one or more particular distributions associated with a particular transmission pattern to structure the electrochromic device to selectively switch to the particular transmission pattern. Species can be introduced via various processes, including ion implantation, chemical diffusion, etc.

First claim

What is claimed is:

1. An apparatus, comprising:
an electrochromic (EC) stack, comprising:
an EC layer,
an ion conducting (IC) layer, and
a counter-electrode (CE) layer comprising a plurality of CE layer regions, wherein each CE layer region of the plurality of CE layer regions is structured to selectively switch to a separate one of at least two different transmission levels, based at least in part upon a particular transport rate of a particular charged electrolyte species in the respective CE layer region,
wherein at least one of the respective CE layer regions comprises a different charged electrolyte species than other ones of the respective CE layer regions.

2. The apparatus of claim 1 , wherein:
the plurality of CE layer regions comprises:
a first CE layer region, which includes a first charged electrolyte species having a first transport rate, is structured to selectively switch to a first transmission level; and
a second CE layer region, which includes a second charged electrolyte species having a second transport rate, is structured to selectively switch to a second transmission level;
wherein the first transport rate is greater than the second transport rate, such that the first CE transmission level is lower than the second transmission level.

3. The apparatus of claim 1 , wherein:
the CE layer is structured to selectively switch between two separate transmission patterns, based at least in part upon a particular distribution pattern of at least the particular charged electrolyte species in at least one CE layer region of the plurality of CE layer regions;
wherein the particular distribution pattern of the at least one particular charged electrolyte species is associated with at least one transmission pattern of the at least two separate transmission patterns.

4. The apparatus of claim 3 , wherein:
the at least one transmission pattern approximates a Gaussian pattern.

5. The apparatus of claim 3 , wherein:
the EC stack comprises at least a portion of a selectively apodized camera aperture filter which is structured to be selectively apodized; and
wherein, to be selectively apodized, the camera aperture filter comprises the CE layer structured to selectively switch between a at least two different transmission patterns, based at least in part upon a particular distribution pattern of at least the particular charged electrolyte species in at least one CE layer region of the plurality of CE layer regions.

6. The apparatus of claim 1 , wherein the encapsulation layer comprises one or more of:
the particular transport rate of the particular charged electrolyte species in the respective CE layer region is based at least in part upon one or more of relative size of the particular charged electrolyte species or relative binding strengths of the particular charged electrolyte species to one or more molecular lattice structures of the CE layer region.

7. The apparatus of claim 1 , wherein the plurality of CE layer regions comprise at least one annular region of the CE layer.

8. A method of making an electrochromic device, the method comprising:
structuring a counter-electrode (CE) layer of the electrochromic device to selectively switch to a separate one of at least two different transmission levels in separate CE layer regions of a plurality of CE layer regions, wherein the structuring comprises:
introducing a separate charged electrolyte species of a plurality of charged electrolyte species, each separate charged electrolyte species having a separate transport rate, in each of the separate CE layer regions
wherein at least one of the separate charged electrolyte species introduced in at least one of the separate CE layer regions comprises a different charged electrolyte species than other ones of the separate charged electrolyte species introduced in other ones of the separate CE layer regions.

9. The method of claim 8 , wherein introducing a separate charged electrolyte species of a plurality of charged electrolyte species, each separate charged electrolyte species having a separate transport rate, in each of the separate CE layer regions comprises:
introducing a particular charged electrolyte species in at least one particular CE layer region to establish a particular charged electrolyte species distribution of the particular charged electrolyte species in the at least one particular CE layer region.

10. The method of claim 9 , wherein:
the particular charged electrolyte species distribution is associated with at least a portion of a particular transmission pattern, such that structuring the CE layer to selectively switch to a separate one of at least two different transmission levels in separate CE layer regions comprises structuring the CE layer to selectively switch to the particular transmission pattern.

11. The method of claim 8 , wherein:
introducing a separate charged electrolyte species of a plurality of charged electrolyte species in each of the separate CE layer regions comprises implanting the separate charged electrolyte species in at least one CE layer region via one or more ion implantation processes.

12. The method of claim 11 , wherein:
implanting the separate charged electrolyte species in at least one CE layer region via one or more ion implantation processes comprises:
implanting the separate charged electrolyte species in at least two separate CE layer regions, wherein the separate charged electrolyte species is implanted in each separate CE layer region according to a separate one of at least two different sets of ion implantation parameters, to establish different charged electrolyte species distributions in each of the at least two separate CE layer regions.

13. The method of claim 12 , wherein introducing a separate charged electrolyte species of a plurality of charged electrolyte species in each of the separate CE layer regions comprises:
introducing another separate charged electrolyte species of the plurality of charged electrolyte species, in one or more of the CE layer regions, subsequently to implanting the separate charged electrolyte species in the at least one CE layer region via one or more ion implantation processes, via a chemical diffusion process.

14. The method of claim 8 , wherein:
introducing a separate charged electrolyte species of a plurality of charged electrolyte species in each of the separate CE layer regions comprises selectively exposing at least one CE layer region to implantation of the separate charged electrolyte species, based at least in part upon a masking which selectively exposes the at least one CE layer region to implantation of the separate charged electrolyte species.

15. A method, comprising:
introducing separate charged electrolyte species, each charged electrolyte species having a different transport rate, in separate electrochromic (EC) regions of an electrochromic device,
wherein at least one of the separate charged electrolyte species introduced in at least one of the separate EC regions comprises a different charged electrolyte species than other ones of the separate charged electrolyte species introduced in other ones of the separate EC regions.

16. The method of claim 15 , wherein introducing separate charged electrolyte species in separate EC regions comprises:
introducing a particular charged electrolyte species into at least one particular EC region to establish a particular charged electrolyte species distribution of the particular charged electrolyte species in the at least one particular EC region.

17. The method of claim 16 , wherein introducing separa

Assignees

• Sage Electrochromics Inc

Inventors

• Bjornard Erik Jon

Classifications

• G02F1/155 Primary

  Electrodes · CPC title

• G02B27/58

  Optics for apodization or superresolution; Optical synthetic aperture systems · CPC title

• G02F1/15

  based on an electrochromic effect · CPC title

• G02F2001/1555

  Counter electrode · CPC title

• G02F1/153

  Constructional details · CPC title